crane ship, method of lowering an object from a crane ship

专利摘要:
CRANE SHIP, METHOD OF LOWERING AN OBJECT FROM A CRANE SHIP. The present invention relates to a crane ship and a method of lowering an object from such a crane ship into the sea. The crane comprises a stationary pedestal, a crane housing which is adapted to rotate relative to the pedestal about a geometric axis of vertical rotation and a boom comprising an inner end which is pivotally connected about a horizontal pivot axis. to crane housing. A jib lifting device extends between the jib and the crane housing, adapted to position the jib and actuate the up and down movement of the jib. Furthermore, an object lifting device is provided, to which a object can be connected, and a lifting assembly comprising a winch and an associated lifting cable, the lifting cable extending from the winch, via a starter pulley on the boom, to the object lifting device, so that, when the winch is actuated, the object suspension device can be raised and (...).
公开号:BR112015002399B1
申请号:R112015002399-1
申请日:2013-08-02
公开日:2021-07-06
发明作者:Joop Roodenburg；Hendrikus Jacobus Weterings
申请人:Itrec B.V.；
IPC主号:

专利说明:

[001] The present invention relates to a crane ship and a method of lowering an object from such a crane ship into the sea, for example, as part of a procedure for lowering the object onto the seabed, for example , at a depth of 300 meters or greater. A prior art crane ship, for example as described in WO 2005123566, by the same depositor, comprises a hull and a crane, wherein the crane comprises: - a stationary pedestal mounted on or integrally formed with the hull of the ship ; - a crane housing which is adapted to rotate relative to the pedestal about a geometric axis of vertical rotation, - a jib, comprising an inner end which is pivotally connected about a horizontal pivot axis to the crane housing, allowing an up and down movement of the boom, and comprising a starter pulley, - a boom lifting device extending between the boom and the crane housing, adapted to position the boom and actuate the up and down movement of the boom, - an object suspending device, to which the object can be connected, - a lifting assembly comprising a winch and an associated lifting cable, the lifting cable extending from the winch, via a starter pulley on the boom, for the object suspension device, so that, in the actuation of the winch, the object suspension device can be raised and lowered, in which the portion of the lifting cable between the boom and the object lifting device forms one or more parts of the lifting cable.
[002] Objects may be lowered into the sea from such a crane ship, that is, lowered out of board from the crane ship into the water, for example, lowered onto the seabed, for example, to a depth of 300 meters or more, by the following steps: - position the object suspension device above the object, - hook the object by the object suspension device and actuate the hoisting winch to raise the object, - position the object in an outside position from board by rotation of the crane housing and/or actuation of the boom hoisting cable, - lower the object overboard and into the sea by actuation of the hoisting winch.
[003] Such a crane vessel is commonly known in the art, and the method of lowering an overboard object into the sea is commonly applied in the art. The aim of the present invention is to provide an improved crane ship and method.
[004] This is accomplished in accordance with a first aspect of the present invention by providing the crane ship, in addition, with a lifting cable guide which, in an operational position thereof, is adapted to guide at least one of the parts of suspension cable between boom and object suspension device. Consequently, the method according to the first aspect of the present invention involves an additional step of bringing a suspension cable part of the lifting cable into engagement with the lifting cable guide, preferably when the object is lowered below sea level. , in particular below the hull of the ship, and guide at least one of the suspension rope parts through the hoist rope guide in its operational position.
[005] An advantage of this guide of a suspension cable part by the hoisting cable guide is that the point of engagement by the guide can be close to the ship's hull, in particular close to the center of movement of the ship. As a result of the sea state, the ship moves around this center of motion: so-called sea state induced ship movements. Ship movements induced by the state of the sea cause the lance to move, and thus the starting sheave of the lance, the amount of which can be several meters in the vertical direction. The closer to this center of motion, the smaller the extent of sea state-induced ship motions.
[006] In the prior art, each part of suspension cable is suspended from the boom. A vertical balance compensating system is commonly provided to compensate for vessel movements induced by the state of the sea, which may thus have to compensate for several meters. According to the first aspect of the invention, a hitch point is in the operative position of the hoisting cable guide, which is between the boom and the object suspension device. By providing this hitch point relatively close to the center of movement of the ship, the suspension cable part is less influenced by ship movements induced by the state of the sea. As a result, the compensation that can be provided by a vertical balance compensator is relatively reduced.
[007] Another advantage of guiding at least a part of the suspension cable between the boom and the object suspension device is that the point of engagement of the suspension cable part with the crane vessel is lower. The closer the point of attachment is to the center of gravity, the better the stability of the crane vessel will improve.
[008] The object to be lowered is thus first engaged, raised, positioned and lowered in the air phase, and subsequently lowered into the sea. Once below water, this is referred to as the underwater phase. The underwater phase then starts when the object has just been lowered underwater, and it may take time for the object to be on the sea floor. The lifting cable guide and its use of guiding a suspension cable part according to the first aspect of the invention are advantageous in this subsea stage. The engagement of the suspension rope part with the lifting rope part preferably takes place when the object is lowered below sea level, in particular below the hull of the ship. The crane ship according to both aspects of the present invention is particularly, but not exclusively, for use in connection with lifting equipment employed for purposes at sea, in particular in the petroleum industry. Underwater activities of the oil industry are being carried out in increasingly deeper waters and, consequently, the lifting of equipment and pipes must be carried out at a much greater depth than hitherto. Such depths are usually around 3000 meters or higher.
[009] Such oil industry activities may include positioning an object on the seabed from a floating vessel, lifting and moving operations from the seabed where a heavy cargo was previously left or stored at over the seabed to be subsequently lifted and moved to a new location without being removed from the water, or positioning an unlaunched end portion of a pipe being cast over the seabed, or retrieving to the ship floating from the end of the pipe that is resting on the seabed, in other words, the launching, abandonment and recovery of objects such as oil transport pipes, pipe end terminations (PLETs), header pipes and the like, particularly during or at the end of the process of launching such tubes from a tube launching vessel onto the seabed. For example, the object is an underwater template to be installed on the seabed. The term "abandonment and recovery" is often abbreviated as "A&R".
[0010] The crane ship according to both aspects of the invention is used for lifting and lowering operations at sea, in particular the launching of objects into the water. The crane ship can be a monohull ship, or a catamaran ship, or any other type of ship. It is even conceivable that the ship is, or could act as a platform at sea. The ship preferably comprises a deck, on which objects to be lowered or raised can be positioned. It is also conceivable that the objects to be lowered or lifted are positioned on the ship's hull, or on another ship or floating object, which is positioned adjacent to the crane ship, or even on land.
[0011] The lifting assembly according to both aspects of the invention preferably comprises a deepwater winch and an associated deepwater cable for raising and lowering an object.
[0012] Preferably, such a deepwater winch and cable allow the lowering of subsea structures to water depths of at least 1000 meters, more preferably up to 3000 meters.
[0013] Such a deepwater winch and such a deepwater cable may preferably be incorporated as an abandonment and recovery (A&R) winch and cable. Such a winch and such A&R cable are used in pipe laying operations to be able to abandon and retrieve a previously laid pipe. For such purposes, it is required that the total weight of the previously laid pipe is suspended from an A&R cable.
[0014] The winch, in particular when used for lowering in deep water, may be incorporated as a linear winch, or a traction winch, or any other suitable type of winch. Preferably, the hoist assembly winches are installed outside the crane housing, as they require a large storage capacity for ultra-deep lifts. Preferably, the winch, and associated or integrated storage drum for the hoisting rope is positioned in the ship's hold. Preferably, the winch and associated or integrated storage drum, in particular a deep water winch, is positioned as low as possible due to its large weight.
[0015] The lifting rope used on the crane ship in accordance with both aspects of the invention may, like most lifting equipment currently in use on offshore construction ships, employ a solid steel cable or steel cables as a means of lifting. To handle the objects involved (250 tons or more), these cables are necessarily large and heavy.
[0016] Alternatively, fiber tows can be used, which can be made of natural or synthetic fibers, in particular polymer fibers, which weigh little or nothing when immersed in water. Possibly aromatic polyamides (aramids) are applied, such as Twaron, Kevlar and Nomex, which thermally degrade at high temperatures and do not fuse. These fibers have a strong bond between polymer chains, resulting in a high-performance artificial fiber. Cable material may be dependent on environmental conditions. It is conceivable that in some cases electrical signal conductors, optical conductors, etc. they can form part of the cable, such as, for example, in umbilical cables.
[0017] In accordance with both aspects of the invention, a stationary pedestal is mounted to, or integrally formed with, the hull of the crane vessel. In particular, the pedestal is preferably mounted on the ship's deck, but it is also conceivable that the pedestal is formed integral with a portion of the hull and possibly the ship's deck, which can improve the overall stability of the crane.
[0018] In accordance with both aspects of the invention, a crane housing is provided, which is adapted to rotate with respect to the pedestal around a geometric axis of vertical rotation, for example, by means of a rotating bearing. In one possible embodiment, the lower portion of the crane housing is bolted via a swivel bracket or bearing to the pedestal. In one possible embodiment, according to both aspects of the invention, the pedestal is incorporated as a fixed mast, and the crane housing is incorporated as a combination of a rotating rotating platform supporting the boom and a rotating mast head on top of the mast. Thus, both a rotating platform supporting the boom and the mast head are provided rotating relative to the fixed mast (pedestal) around a geometric axis of vertical rotation. The hoist rope is allowed to run from the mast head or the rotating slewing platform to the boom starter sheave. Also, the boom lift cable is allowed to run from the masthead to the main boom to control the position of the main boom. Such a mast construction provides an inherent safety feature; the load moment is supported by the mast and not the slewing bearings.
[0019] Furthermore, according to both aspects of the invention, the crane comprises a jib, comprising an inner end that is pivotally connected around a horizontal pivot axis to the crane housing, allowing an upward and downward movement. under the spear, and comprising a starter pulley. As a result of the rotating movement of the crane housing, rotation of the boom in a horizontal plane is allowed. Preferably, the crane housing is allowed to rotate over 360° so that the boom has a 360° reach to have a large crane reach area from a position above the deck so that an object can be engaged , to a position above water, into which the object can be lowered.
[0020] According to both aspects of the invention, the boom is rotatable about a geometric axis of horizontal pivot with respect to the crane housing, allowing an up and down movement of the boom. This movement is actuated by a boom lifting device, which is provided in order to position the boom. The jib lifting device, which may, for example, comprise a cable or a cylinder, extends between the jib and the crane housing.
[0021] According to both aspects of the invention, the lance may comprise a single lance or lance arm. Alternatively, the boom may comprise multiple articulated boom sections.
[0022] In a particular embodiment of both aspects of the invention, the boom is incorporated as an articulated boom, comprising a main boom and a boom arm. The main boom comprises the inner end of the boom, which is pivotally connected about a first horizontal pivot axis to the crane housing; the main boom additionally comprising a center area and an outer end. The starter pulley is provided on the jib arm. The lance arm comprises a spear point, and additionally a central area and an inner end opposite the point. The inner end of the boom arm is pivotally connected about a second horizontal pivot axis to the outer end of the main boom. As is typical for a jib crane, the boom swivels at the 'pivot' near the center, letting it bend back like a finger, thus creating the so-called jib boom. This provides a compact size for storage and maneuvering. Thus, the boom arm can be pivoted at least between an extended position, in which the starter pulley extends mainly in front of the main boom, and a bent position, in which the boom arm is bent backwards along the boom. main.
[0023] The articulated jib crane was particularly advantageous for marine purposes as the crane's 'finger folded back' allows the crane to lift objects with the boom arm starter pulley close to the ship, in particular on the ship deck . In this way, object movements can be limited as the boom arm starter pulley can be kept at a limited height above the deck. Also, when the object's force is introduced at a lower point of the crane, the stability of the ship is increased. These features make the crane safe and efficient.
[0024] To operate the articulated boom, both parts of the boom, the main boom and the boom arm, are individually controlled. The boom lifting device usually controls the main boom. Conventionally, hydraulic cylinders are used, in particular for articulated jib cranes capable of lifting objects of a few thousand kilograms up to objects of up to 50 tons.
[0025] Alternatively, according to another invention of the same depositor, in order to position the lance arm with respect to the main jib, a tensioning member and a curved extension guide are provided, the tensioning member extending between the housing of crane and a curved extension guide, and a curved extension guide being connected to the boom arm and being pivotable together with the boom arm about the second pivot axis, and guiding a portion of the tensioning member, wherein a second winch makes it possible to vary the length of the tensioning member and thus position the boom arm.
[0026] According to both aspects of the invention, an object suspension device is provided, to which the object can be connected. In general, the device comprises a hook or the like.
[0027] According to both aspects of the present invention, the lifting assembly may comprise multiple branches. To guide the branches of the lifting cable, the object suspension device preferably comprises at least one pulley or pulley for guiding the lifting cable. A double leg lift assembly requires a single sheave or pulley on the object suspension device. A multiple branch lifting assembly requires opposing blocks on which multiple sheaves are arranged to guide the branches of the lifting cable, preferably provided on the object suspension device and on the lance, preferably at the tip of the lance. In addition, additional pulleys or pulleys or other cable guides can be provided to guide the lifting cable from the winch to the boom.
[0028] In an embodiment of the first aspect of the invention, the hoisting rope is provided as a single branch rope, for example, adapted to lower over the seabed, for example, more than 300 meters deep. In such an embodiment, the lifting cable extends from the winch, via a starter pulley on the boom, to the object lifting device. The portion of the lifting rope between the starter pulley and the object suspension device forms the only part of the suspension rope. The lifting cable guide is, in its operative position, adapted to guide this part of the suspension cable.
[0029] In an alternative embodiment of the first aspect of the invention, the lifting cable is provided as a multi-leg cable comprising one or more first suspension cable portions extending between the object suspension device and a location radially for outside the boom, and one or more second suspension cable portions extending between the object hanging device and a location radially into the boom. In this embodiment, the lifting cable guide, in its operative position, is adapted to guide one or more second suspension cable portions. In a preferred embodiment, the one or more lance starter pulleys are provided in place radially outwardly. A hoist rope retaining device is provided on the boom between the inner end of the boom and the radially outward location. The lifting cable retaining device can be provided with one or more pulleys, or alternatively a dead end connection point for the lifting cable can be provided.
[0030] Another advantage of the first aspect of the invention is that by engaging the one or more second suspension cable parts by means of the guide in such an arrangement of multiple branches, the angle between the first and second parts of suspension cable suspension can be increased. This increased angle between the hoist rope parts allows to prevent hoist rope tangling, a phenomenon also known as rope or wire twisting. The larger the angle, the better the prevention of entanglement.
[0031] As elucidated above, it is advantageous that the hoisting cable guide, in its operational position, and thus the point of engagement of the suspension cable part with the crane ship, is provided close to the center of movement of the ship and close to the ship's center of gravity. The advantages are significant, even when the lifting cable guide is provided at some distance from the center of movement and the center of gravity, there is a favorable area of locations for the lifting cable guide. In one possible embodiment, in an operational position, the hoisting cable guide is positioned in the vertical direction essentially between the horizontal pivot axis of the boom and the bottom of the hull, and in a direction transverse to the ship within 5 meters of a side of the hull, and in the longitudinal direction along the hull of the ship.
[0032] In the operational position, the lifting cable guide can be connected, for example, to the crane pedestal, crane housing, or to the ship's hull, etc. For example, the ship can be provided with a deck, onto which the lifting cable guide is connected. Possibly, but not necessarily, the lifting cable guide is positioned outside the hull in the operative position, seen in the top view.
[0033] According to the method of the first aspect of the invention, a suspension cable part is to be brought into engagement with the lifting cable guide, after which the lifting cable guide is adapted to guide the at least one of the suspension cable part. Possibly, the lifting cable guide is incorporated as a pulley, a cable guide, a pulley, etc. In one possible embodiment, the lifting cable guide has an open configuration allowing the at least one part of the suspension cable to be brought into engagement with the lifting cable guide, which open configuration also allows the guidance of the at least one suspension cable part according to the first aspect of the present invention.
[0034] In one possible embodiment, the lifting cable guide is adapted to transform between an open configuration allowing the at least one part of the suspension cable to be placed in engagement with the lifting cable guide and a closed configuration in the which at least one part of the suspension cable is guided by the lifting cable guide and cannot become separated from the lifting cable guide.
[0035] As indicated above, the method according to the first aspect of the present invention involves the step of bringing a suspension cable portion of the lifting cable into engagement with the lifting cable guide. This can be achieved by causing the suspension cable part to move in the direction of the hoisting rope guide, for example by crane rotation, or by causing the hoisting rope guide to move in the direction to the suspension cable part, or a combination thereof.
[0036] A preferred method comprises the step of rotating the crane housing and/or actuating the boom lifting cable to bring a suspension cable portion of the lifting cable into engagement with the lifting cable guide. The rotation of the crane causes the suspension cable portion to rotate around the geometric axis of vertical rotation of the crane housing, resulting in a movement essentially perpendicular to the hull in the vicinity of the hull. Actuation of the boom lifting cable causes the suspension cable portion to radially move towards and away from the crane housing. As such, the suspension cable part can be taken to any position within the range of the crane.
[0037] The lifting cable guide, according to the first aspect of the present invention, is used in an operational position thereof during lowering objects from the crane ship, and more preferably during lowering at sea of the same to the seabed, for example, to depths above 300 meters. During other operations, and for example also during navigation, it may be advantageous to move the lifting cable guide away from its operational position. Possibly, the lifting cable guide can be brought into its operating position by the crane. Alternative means for mounting the hoisting rope guide on the ship are also conceivable.
[0038] In a possible embodiment, the lifting cable guide is provided movable relative to the hull of the ship. It is conceivable that the lifting cable guide is movable between the operating position and a storage position, in which the lifting cable guide can be stored during other operations. In addition, or alternatively, it is also conceivable that the lifting cable guide, during the guidance of at least one of the suspension cable parts, is movable from one operating position to another operating position. Still alternatively, the hoist rope guide can be movable from the operating position to a non-operating position in which no part of the hoist rope is being guided. According to a possible method of the first aspect of the invention, wherein the lifting cable guide is movable, the suspension cable portion is brought into engagement with the lifting cable guide by moving the lifting cable guide into a operational position. Still alternatively, the suspension cable part can be brought into engagement with the lifting cable guide in an engagement position of the lifting cable guide, and the lifting cable guide with the cable suspension part engaged is subsequently allowed to move into an operational position. A mobile hoisting rope guide is in particular advantageous when, due to sea state induced ship movements, it is difficult to bring the hoisting rope part exactly into an operative position of the hoisting rope guide.
[0039] In one embodiment, a lifting cable guide drive is provided, which is adapted to move the lifting cable guide to an engagement position remote from the operating position, and which is also adapted to move the lifting cable guide. lifting cable and the hooked part of the suspension cable from the hitch position to an operational position. Such a drive can allow translations of the hoist cable guide within a horizontal plane, but alternatively a sophisticated hoist cable guide drive that allows movement in all directions is also conceivable. Possibly, the hoisting cable guide drive comprises one or more hydraulic cylinders. Alternatively, the hoist rope guide drive comprises a hoist assembly comprising one or more hoists and hoist ropes. With such a lifting cable guide drive, the suspension cable part can, in a possible method according to the first aspect of the invention, be brought into engagement with the lifting cable guide by: - actuating the drive of lifting cable guide to move the lifting cable guide to an engagement position until the lifting cable guide reaches the lifting cable part, - engaging the lifting cable part with the lifting cable guide, - move the lifting cable guide and the hooked part of the suspension cable from the hitch position to an operational position.
[0040] In a possible embodiment of a mobile lifting cable guide, the lifting cable guide is connected to a guide winch and a guide handle. The guide winch comprises a jib portion which extends between the jib and the hoisting cable guide, which jib portion extends radially outward from the jib portion which is, or is to be, engaged by the guide of lifting cable. The guide handle originates from the operating position of the lifting cable guide. Both the guide winch and the guide puller can preferably be actuated and lowered by actuation of the associated winches. According to this modality, by actuation of the guide winch and the guide puller, the lifting cable guide can move between a position adjacent to the boom and the operating position of the lifting cable guide, in which the cable guide hoist is adapted to guide a part of suspension cable. In one possible method, before engaging the object by the object lifting device, the guide winch is actuated to move the lifting cable guide to a position adjacent to the boom, and after the object has been lowered overboard, the guide puller is actuated to move the lift cable guide into an operating position, to bring the suspension cable portion of the lift cable into engagement with the lift cable guide.
[0041] In an alternative embodiment, the lifting cable guide is provided on a lifting cable guide carriage engaging on a lifting cable guide track which is provided along the hull of the ship and which extends essentially parallel to the longitudinal geometric axis of the ship. A lift cable guide drive is adapted to translate the lift cable guide carriage along the lift cable guide track. According to the possible method according to a first aspect of the invention, the hoisting rope is brought into engagement with the hoisting rope guide by: - rotating the crane housing so that the suspension rope part of the hoisting rope. hoist moves in the direction of the ship's hull until the suspension cable portion is adjacent to the hoist line guide track, - actuate the hoist line guide drive to translate the hoist line guide to the guide of lifting cable reach the suspension cable part, - engage the suspension cable part with the lifting cable guide. Optionally, the hoist rope guide with the hoist rope engaged portion may subsequently be allowed to translate along the hoist rope guide track. As such, the hoist cable guide can translate to an operating position, or possibly between alternative operating positions.
[0042] In place of or in addition to a mobile lifting cable guide, in a possible embodiment, in the vicinity of the lifting cable guide a lifting cable receiver is provided, which is adapted to receive the cable portion and allow the suspension cable portion to slide into the lift cable guide. Such a hoisting rope receiver is in particular advantageous when, due to sea state induced ship movements, it is difficult to bring the hoisting rope part exactly into an operative position of the hoisting rope guide. The receiver allows the suspension cable part to be moved by the crane in one direction, for example the rotational movement, until the cable part is stopped by the receiver, and by subsequently performing the opposite movement by the crane, in the example the movement radial, thus allowing the suspension cable portion to be slid towards the lifting cable guide. As such, the movement of the suspension cable part is accurately controlled and brought to the lifting cable guide.
[0043] According to a method according to a first aspect of the present invention, the suspension cable part is placed in engagement with the lifting cable guide by: - providing the lifting cable receiver in an operational position, - rotating the crane housing and/or actuating the boom lifting cable to bring the suspension cable portion of the lifting cable into engagement with the lifting cable receiver; - rotate the crane housing and/or actuate the boom lifting cable to allow the suspension cable portion to be slid along the lifting cable receiver to the lifting cable guide, engaging the suspension cable portion with the lifting cable guide.
[0044] Optionally, a lifting cable guide drive and/or a lifting cable receiver drive can subsequently move the lifting cable guide with the engaged part of the suspension cable.
[0045] In one possible embodiment, the hoisting cable receiver extends in a radial direction from the crane housing. This is advantageous when the hoist rope receiver is adapted to receive the hoist rope part by rotation of the crane housing, as a result of which the hoist rope part is rotated against the hoist rope receiver. A subsequent actuation of the boom hoist rope is sufficient to translate the hoist rope portion along the hoist rope receiver.
[0046] Alternative modalities, in which the hoisting cable receiver comprises a longitudinal geometric axis extending in a horizontal plane, for example essentially parallel to the ship's hull, are also conceivable. Possibly, the hoisting rope receiver comprises a funnel-shaped portion, comprising a wide end which is adapted to receive the suspension rope part, and an opposite narrow end which is provided in the vicinity of the hoisting rope guide. When lowering the object, and for example also during navigation, it may be advantageous to remove the hoisting cable receiver. Possibly, the hoisting cable receiver can be brought into its operating position by the crane. Alternative means for installing and removing the hoist cable receiver are also conceivable. In one possible embodiment, the hoist cable receiver is movable by a hoist cable receiver drive. It is conceivable that the hoisting cable receiver is movable between an operating position and a storage position, where the hoisting cable receiver can be stored during other operations.
[0047] The present invention also relates to a crane ship comprising a hull and a crane, wherein the crane comprises: - a stationary pedestal mounted on or integrally formed with the hull of the crane ship; a crane housing which is adapted to rotate with respect to the pedestal about a geometric axis of vertical rotation, - a boom, comprising an inner end which is pivotally connected around a geometric axis of horizontal pivot to the crane housing, enabling an up and down movement of the boom, and comprising a starter pulley, - a boom lifting device extending between the boom and the crane housing, adapted to position the boom and actuate the up and down movement of the boom, - an object suspending device, to which an object can be attached, - a lifting assembly comprising a winch and an associated lifting cable, the lifting cable extending from the winch, via a pulley starting on the boom, to the object suspension device, so that, in the performance of the winch, the object suspension device can be raised and lowered, in which the one or more portions of the hoisting cable between the boom and the object hoisting device form one or more hoisting rope parts, and wherein the hoisting rope is provided as a multi-leg rope.
[0048] Such crane ships are well known in the art. When a multi-leg lift cable is used, a general problem is that the lengths of the lift cable can become tangled, a phenomenon also referred to as cable or wire twisting. This problem is solved, according to a second aspect of the present invention, by a hoisting rope retaining device which is provided on the boom. The hoisting rope comprises one or more first hoisting rope portions extending between the object hoisting device and a radially outward location of the boom, and one or more second hoisting rope parts extending between the hoisting device. object suspension and a location radially inward, so that the first and second suspension cable parts extend V-shape to each other at an angle of preferably between 20 and 60°.
[0049] It is conceivable that both the hoisting rope retaining device is provided in place radially into the boom and the starter pulley is provided in place radially outward, or vice versa, i.e. that the retaining device of lifting rope is provided in place radially outward from the boom and the starter pulley is provided in place radially inward.
[0050] The lifting assembly may comprise two branches, resulting in a single first suspension cable part and a single second suspension cable part. Also four branches are conceivable, for example comprising parallel 'first suspension cable parts' and 'second suspension cable parts'. Alternative configurations, in which, for example, one branch can be considered the second suspension cable part, and multiple branches are considered the first suspension cable part are also conceivable.
[0051] According to a preferred embodiment of the second aspect of the invention, the lifting cable extending from the winch may have an inactive end or an end connected to another winch. It is conceivable that two winches are provided, and that the hoisting cable extends from a winch, via the boom, via the object suspension device, possibly via a hoisting cable guide, and via from the hoist rope retaining device, to the second winch. Alternatively, the lifting cable has a dead end connected to a dead end connection point. This point can be provided anywhere on the boom, or in the crane housing, or even on the hull or on the deck of the ship. In one embodiment, the hoisting cable retaining device may be incorporated as the dead end connection point. As such, the lifting cable extends from the winch, via the boom, via the object suspension device, possibly via a lifting cable guide, to the lifting cable retaining device, and is connected to it.
[0052] According to the second aspect of the present invention, a hoist rope retaining device is provided on the boom. The lifting rope retaining device allows the first and second parts of suspension rope to extend V-shape to each other at an angle of preferably between 20 and 60°, but it is noted that angles of 5-120° are also possible.
[0053] As indicated above, the hoisting cable retaining device according to the second aspect of the invention may in a certain embodiment be a dead end connection point. Alternatively, the lifting cable retaining device can be a pulley or any type of lifting cable guide. In the case of an articulated jib assembly, the lifting cable retaining device is possibly provided on the second pivot axis, between the main jib and the jib arm.
[0054] In a preferred embodiment according to the second aspect of the invention, the angle between the first and second parts of suspension cable is adjustable, at a given position of the inner end of the boom and the object suspension device. Of course, the angle will inevitably change when lowering or lifting the object suspension device. In addition, on actuation of the boom lifting device, the angle will inevitably change as well. According to the preferred modality, it is also possible to change the angle, in a given position of the inner end of the boom (thus without the rotation of the boom) and in a given position of the object suspension device, thus without raising or lowering the object . According to possible embodiments of the present invention, the following alternatives for adjusting the angle are contemplated: - changing the relative positions of the starter pulley and the hoisting rope retaining device, - providing a hoisting rope guide which, in an operative position thereof is adapted to guide at least one of the second suspension cable parts between the lance and the object suspension device.
[0055] In a possible embodiment according to the first and second aspects of the invention, the crane ship is further provided with a lifting cable guide which, in an operational position thereof, is adapted to guide at least one of the second parts of suspension cable between the boom and the object suspension device. In an engaged situation, at least one of the second suspension cable portions extends from the object suspension device via the lifting cable guide to the boom. So, rather than extending directly to the boom, the cable is guided by the lifting cable guide, which is positioned lower (viewed in the vertical direction) than the boom. As the at least one of the second parts of suspension cable now no longer has to extend to the boom, but is allowed to extend to a lower point, in terms of height, the angle between the first and second parts of suspension cable will be longer.
[0056] The lifting cable guide can be releasably provided, so that only when objects are actually lowered into the (deep) water, the lifting cable guide is provided. For example, the lifting cable guide can be perforated between a bent-away position and an active position in which it can guide the lifting cable.
[0057] Preferably, the lifting cable guide is affixed to the crane housing, so that when the boom, the lifting cable and the object suspension device are rotated around the geometric axis of vertical rotation, the guide of lifting cable is spun with them. Alternatively, it is also conceivable that the lifting cable guide is affixed to the stationary pedestal, or even to the hull of the ship. As such, rotation is no longer possible, but this is not always required when lowering objects.
[0058] According to the first and second aspects of the invention, it is conceivable that multiple lifting cable guides are provided in various positions, for example, connected to the hull and the pedestal.
[0059] In an embodiment, in which a lifting cable guide is provided, the angle between the first and second suspension cable portions is thus adjusted by allowing the lifting cable guide to engage with the second cable portion of suspension cable, or vice versa, and subsequently guiding the second suspension cable part and creating a greater angle between the first and second suspension cable parts.
[0060] It is conceivable that the hoist rope guide is allowed to engage the second hoist rope part by bringing the second hoist rope part into the vicinity of the hoist rope guide.
[0061] In one possible embodiment, the crane is operable to move the one or more second suspension cable parts to a position in which the lifting cable guide is capable of engaging the one or more second suspension cable parts. The boom can be rotated to a position above the lifting cable guide. Subsequently, the boom lifting cable can be actuated to allow the boom, and thus the radially inward location from which the second part of the suspension cable is suspended, to move to a position essentially above the guide. of lifting cable, this position in which the lifting cable guide is able to engage with the second part of the suspension cable. Consequently, the boom hoisting device is used to position the boom essentially vertically, bringing the hoisting cable retaining device, to which the hoisting cable extends, to a position essentially above the hoisting cable guide, and, as such, the lifting cable to engage with the lifting cable guide (or the lifting cable guide to engage with the lifting cable).
[0062] In particular, in the case of an articulated boom assembly, the hoisting cable retaining device can possibly be provided on the second pivot axis, and the starter pulley on the boom arm. Possibly not only the boom hoisting cable may have to be actuated to bring the hoisting cable retaining device to a position essentially above the hoisting cable guide, but also the boom arm positioning means to position the boom arm in relation to the main boom.
[0063] It is noted that to obtain the engagement of the lifting cable with the lifting cable guide, the position of the object suspension device is not changed, but the position of the inner end of the boom will be changed by actuation of the lifting cable of spear. However, the position of the inner end of the boom can be brought back to the same position before the hitch operation, and as such different angles between the lifting rope portions are possible at a given position of the inner end of the boom and of the object lifting device, by actuation of the boom hoisting cable, and possibly also by the boom arm positioning means. In an alternative embodiment, it is conceivable that the lifting cable guide is allowed to engage the second suspension cable portion by bringing the lifting cable guide into engagement with the second suspension cable portion.
[0064] This can be achieved, according to a possible embodiment, wherein the hoisting cable guide is connected to a guide winch and a guide handle, wherein the guide winch comprises an extending boom portion between the jib and the lifting cable guide, which lance portion extends radially outward from the part of the suspension cable which is, or is to be, engaged by the lifting cable guide, and in which the guide handle originates from the operating position of the lifting cable guide, so that, by actuation of the guide winch and the guide handle, the lifting cable guide can move between a position adjacent to the boom and the operating position of the lifting cable guide, wherein the lifting cable guide is adapted to guide a part of the lifting cable.
[0065] As indicated above, the angle between the first and second suspension rope parts can be varied in accordance with the present invention, alternatively, by changing the relative positions of the starter pulley and the hoist rope retaining device ,
[0066] According to an embodiment of the present invention, this can be achieved by providing an articulated boom assembly. As indicated above, an articulated boom assembly comprises a main boom and a boom arm. The hoisting rope retaining device is preferably provided on the second pivot axis, between the main boom and the boom arm. The starter pulley is provided on the boom arm. The distance in position in the horizontal plane between the starter pulley and the hoisting rope retaining device can thus be changed by changing the rotational position of the boom arm, relative to the main boom. Of course, the absolute distance between the starter pulley and the second pivot axis will not change, but the distance, when viewed in the horizontal direction, will change, and, as a consequence, the angle between the first and second portions of lifting cable will vary. In this mode, the angle adjustment device thus comprises lance arm positioning means for positioning the lance arm in relation to the main lance.
[0067] As indicated above, the angle between the first and second suspension rope parts can be varied in accordance with the present invention, alternatively, by changing the position of the lifting rope retaining device with respect to the sheave of match. According to a possible embodiment, according to the second aspect of the invention, the hoisting rope retaining device is provided on a carriage which is allowed to move along the boom, thus changing the angle between the first and the second suspension cable parts. The invention can be summarized in accordance with one or more of the following clauses: 1. Crane ship for lifting and lowering objects in the sea, comprising a hull and a crane, the crane comprising: - a stationary pedestal mounted on, or integrally formed com, the hull of the ship; - a crane housing which is rotational with respect to the pedestal about a geometric axis of vertical rotation; - a jib assembly comprising an inner end and a tip, the inner end is pivotally connected about a first horizontal pivot axis to the crane housing; - a jib lifting device in order to position the jib assembly extending between the jib assembly and the crane housing; - an object suspension device, to which the object can be connected; - a multi-branch lifting assembly, comprising a winch and an associated lifting cable, the lifting cable extending from the winch, to the tip of the boom assembly, to the load suspension device, so that , in the actuation of the winch, the object suspension device can be raised and lowered; characterized in that a lifting cable retaining device is provided on the boom assembly at a distance from the tip of the boom assembly, allowing the lifting cable to extend from the object lifting device to the device. of the hoisting rope, such that a first portion of the hoisting rope extending from the tip of the boom assembly towards the object suspension device and a second portion of the hoisting rope extending away from from the object suspending device in the direction to the hoisting rope retaining device extend V-shape to each other, at an angle of preferably between 20 and 60°.
[0068] 2. Crane ship according to clause 1, further comprising an angle adjustment device for adjusting the angle between the first and second portions of the lifting cable at a given position of the inner end of the boom assembly and the load suspension device.
[0069] 3. Crane ship according to clause 2, wherein a hoisting cable guide may be provided near the pedestal of the crane, preferably affixed to the crane housing, and wherein the angle adjustment device allows the lifting cable guide engages with the second portion of the lifting cable such that, in the engaged situation, the second portion of the lifting cable extends from the object lifting device through the lifting cable guide to the lifting cable retention device.
[0070] 4. Crane ship according to clause 3, wherein the angle adjustment device comprises the boom lifting device, allowing the boom assembly, and thus the lifting cable retaining device, to move to a position essentially above the lifting cable guide so that the second portion of the lifting cable is adjacent to the pedestal, in which position the lifting cable guide is capable of engaging with the second portion of the lifting cable.
[0071] 5. Crane ship according to clause 3, wherein the hoisting cable guide is a wire-wire guide, and wherein the angle adjustment device comprises a wire-wire guide winch extending from a position close to the tip of the boom assembly, and a wire lifting wire puller that extends from a position close to the crane pedestal, both extending into the wire wire guide, so that, in actuation of the device of angle adjustment, the position of the wire wire guide can be varied, and the lifting cable can be allowed to engage the wire wire guide.
[0072] 6. Crane ship according to clause 2, wherein the hoisting rope retaining device comprises a carriage, and wherein the angle adjustment device allows the carriage to move along the boom assembly.
[0073] 7. Crane ship according to one or more of the preceding clauses, wherein the jib assembly is an articulated jib assembly, comprising: - a main jib comprising the inner end that is pivotally connected around a first axis geometric from horizontal pivot to crane housing; the main boom further comprising a center area and an outer end; and - a lance arm comprising the tip of the lance assembly, further a central area and an inner end opposite the tip, the inner end of which is pivotally connected about a second horizontal pivot axis to the outer end of the lance. main; - wherein the boom arm can be pivoted at least between an extended position, in which the tip extends mainly in front of the main boom, and a bent position, in which the boom arm is bent backwards along the main boom ; wherein the hoisting rope retaining device is provided on the second pivot axis.
[0074] 8. Crane vessel in accordance with one or more of the preceding clauses, wherein the pedestal is incorporated as a fixed mast, and wherein the crane housing is incorporated as a rotating rotating platform supporting the boom assembly and a head of rotating mast on top of the mast.
[0075] 9. Crane vessel in accordance with one or more of the preceding clauses, wherein the lifting cable has an inactive end, and wherein a lifting cable retaining device is incorporated as an inactive end connection point, provided on the boom assembly.
[0076] 10. Crane ship according to one or more of the preceding clauses, wherein the multi-leg lift assembly is a double leg lift assembly.
[0077] The invention will be explained in more detail with reference to the accompanying drawings, in which: figures 1A-1H show various steps of lifting and lowering cargo using a first mode of a crane ship according to the first and second aspects of the present invention; Figures 2A and 2B show load lifting and lowering steps using a second embodiment of a crane ship in accordance with the first and second aspects of the present invention; Figures 3A-3C show load lifting and lowering steps using a third embodiment of a crane ship in accordance with the second aspect of the present invention; Figures 4A-4C show load lifting and lowering steps using a fourth embodiment of a crane ship in accordance with the second aspect of the present invention. figure 5 represents a crane ship according to the prior art in a perspective view; Figure 6 represents the crane ship of Figure 5, provided with a lifting cable guide in accordance with the first aspect of the present invention; Figure 7 represents the crane ship of Figure 5 provided with alternative hoisting rope guides in accordance with the first aspect of the present invention; Figure 8 represents the crane ship of Figure 5, further provided with an alternative hoisting rope guide in accordance with the first aspect of the present invention; Figure 9 represents the crane ship of Figure 8, provided with an alternative configuration of lifting rope in accordance with the first and second aspects of the invention; Figures 10a-10e schematically represent a pedestal, lifting cable guide and lifting cable receiver in accordance with an embodiment of the first and second aspects of the present invention; Figures 11a-11d schematically represent alternative methods of bringing a suspension cable portion into engagement with a lifting cable guide in accordance with the first and second aspects of the present invention; Figures 12a and 12b schematically further represent alternative methods of bringing a suspension cable portion into engagement with a lifting cable guide in accordance with the first and second aspects of the present invention; Figure 13 schematically represents an embodiment of a lifting cable guide according to the first and second aspects of the present invention.
[0078] In figures 1A-1H, a crane ship 1 is visible according to the first and second aspects of the invention, comprising a hull 2 and a deck 3. On deck 3, an object 10 is placed, which must be lifted from deck 3 and subsequently lowered into the water, usually indicated with the letter W.
[0079] A stationary pedestal 5 is mounted integral with the ship's hull 2, and extends above deck 3. A crane housing 6 is mounted rotationally relative to pedestal 5, around a geometric axis of vertical rotation R1. A jib 11 is pivotally connected to the crane housing 6. In the embodiment shown, the jib 11 is an articulated jib assembly, comprising a main jib 12 comprising an outer end, which is pivotally connected about pivot axis R2 to the housing. of crane 6. The articulated jib assembly further comprises a jib arm 13 comprising a tip T of the jib 11. The outer end of the main boom 12, opposite the inner end, is pivotally connected about a second horizontal pivot axis. R3 to an inner end of the lance arm 13, opposite the tip T. The lance arm 13 can be pivoted at least between an extended position, in which the tip T extends mainly in front of the main jib 12, as seen in the figures 1A - 1D, and a folded position in which the boom arm is folded back along the main boom, as shown in Figure 1F.
[0080] In order to position the main boom 12 of the articulated jib assembly, a jib lifting device 14, here a jib lifting cable 14, is provided, extending between the second pivot axis R3 of the swivel assembly. articulated jib 11 and crane housing 6, in particular a vertical portion of crane housing 6.
[0081] In order to position the boom arm 13 with respect to the main boom 12, in the embodiment shown, a tensioning member 15 and a curved extension guide 16 are provided, the tensioning member 15 extending between the crane housing 6, here a central portion of the vertical portion of the crane housing, and a curved extension guide 16. The curved extension guide 16 is connected to the lance arm 13 and can be pivoted together with the lance arm about the second axis R3 pivot geometry. The curved extension guide 16 guides a portion of the tensioning member 15, whereby a second winch allows to vary the length of the tensioning member and thus position the lance arm.
[0082] A double branch lifting assembly is provided, comprising a winch 16 provided in the hull 2 of the ship. From winch 16, a hoisting cable 17 extends through pedestal 5, crane housing 6, via a sheave S1 and sheave S2 on the second axis of horizontal pivot R3 to the tip T of the boom, where cable 17 is guided by an S3 starter pulley (figures 1A-1E, 1G, 1H) or an S4 starter pulley (figure 1F) to an object suspension device 18.
[0083] In the embodiment shown, the object suspension device 18 is a hook, capable of engaging the object 10, comprising a pulley S5 for guiding the lifting cable 17. The lifting cable 17 comprises a first part of the suspension cable 17a extending between the object suspension device 18 and the starter pulleys S3, S4 at a location radially outward from the boom, here the tip T.
[0084] According to the present invention, a hoisting rope retaining device H is provided on the boom 11, here provided at a location radially inward with respect to the starter pulley S3, S4, provided radially externally. The hoisting rope 17 thus comprises a second suspension rope part 17b extending between the object suspension device 18 and the rope holding device H, so that the first and second suspension rope parts 17a, 17b extend in a V-shape to each other, at an angle of preferably between 20 and 60°. Here, the lifting cable 17 has an inactive end, connected to the lifting cable retaining device H, on the second axis of horizontal pivot R2.
[0085] As seen in Figure 1B, in the actuation of the hoisting winch 16, the object 10 can be lifted in an unchanged configuration of the crane and boom housing. In figure 1C, the crane housing 6 has rotated around the geometric axis of rotation R1 to place the object 10 above water W, where the lifting cable can be lowered further to lower the object, as shown in the figure. 1D.
[0086] In figure 1E, it is visible that the angle has increased with respect to the position shown in figure 1D, without changing the position of the inner end of the boom (thus without a rotation of the main boom 12) and without changing the position of the suspension device of object 18. This is achieved by actuating the tensioning member 15, and thus changing the position of the lance arm 13 with respect to the main lance 12. This thus visualizes an embodiment of the invention, according to which the angle between the first and the second part of suspension cable is adjusted by positioning the boom arm.
[0087] In Figure 1F, the angle has decreased to a minimum, but it is now visible that the combined operations of the boom arm positioning means, i.e. the tensioning member 15, and the boom lifting device 14, have led the lifting cable retaining device H to a position essentially above a lifting cable guide 19, which has now been placed in its active position. In figures 1A-1E, the lifting cable guide is not visible. By placing the lifting cable retaining device H above this lifting cable guide 19, the second portion 17b of the lifting cable is allowed to engage with the lifting cable guide 19, so that, in the engaged situation, the second portion of the lifting cable 17B extends from the object hanging device 18 via the lifting cable guide 19 to the lifting cable retaining device H.
[0088] As such, an alternative embodiment of the invention is envisioned, according to which an additional hoisting cable guide is provided, and in which the combined operations of the boom arm positioning means, i.e., the lifting member. tensioning 15, and the jib lifting device 14, allow the lifting cable guide to engage with the second portion of the lifting cable 17b.
[0089] By comparing figures 1E and 1G, it is visible that the angle is increased at a given position of the inner end of the boom and the load suspension device. To obtain this increase, it is noted that the position of the articulated boom assembly is changed by actuation of the boom lifting cable and the boom arm positioning means.
[0090] Subsequently, as visible in figures 1G and 1H, the boom 11 can be taken to any desired position, increasing the angle as much as possible to prevent entanglement (twisting cables).
[0091] In figures 2A and 2B, a second embodiment of a crane ship 35 according to the first and second aspects of the present invention is shown. Only a small portion of hull 34 and deck 37 are visible.
[0092] A lifting crane 20 has a vertical column 21, substantially hollow, with a foot 22, which in this case is fixed to the deck 37 of the ship 35. This combination forms the stationary pedestal of the crane. In addition, the column 21 has a top 23 and an annular support structure 25 extending around the vertical column 21, both of which are rotatably mounted on the vertical column and form the rotating crane housing.
[0093] The lifting crane 20 has a jib 24. The annular support structure 25 guides and supports a jib connecting member 26, so that the jib connecting member 26, and therefore the jib 24, can revolve around column 21.
[0094] The lance connecting member 26 forms a substantially horizontal pivot axis, so that the lance 24 can also be pivoted up and down. At least one drive motor 27 is present to move the lance connecting member 26 along the annular support structure 25. By way of example, the annular support structure 25 comprises one or more guide tracks, which extend into the around the column 21 and on which an annular component of the lance connecting member 26 is supported by means of roller wheels. The drive motor 27 can, for example, drive a pinion which engages with a toothed track around the column 21. To pivot boom 24 up and down, a boom lifting device is provided. In this mode, the jib lifting device comprises a winch 30 provided with a jib lifting cable 31, which engages with the jib 24.
[0095] In addition, the lifting crane 20 comprises a double-leg lifting assembly comprising a lifting winch 35 for raising and lowering a load 10, with an associated lifting cable 36 and a load suspension device, here a lifting hook 33.
[0096] At the top 23 of column 21 there is a top cable guide 40 provided with a cable pulley assembly 41 for the jib lifting cable 31, and with a cable pulley assembly 42 for the lifting cable 36 .
[0097] One or more cable pulley assemblies 43 for the lifting cable 36 and a cable pulley assembly 44 for the jib lifting cable 31 are arranged on the jib 24.
[0098] Lifting cable 36 thus extends from the winch 35 to a starter pulley 45 of the boom 24 to the object suspension device 33. It is noted that, in this modality, also within the scope of the invention, the lifting cable lift does not extend to the end of the boom, but to a starter sheave 45 provided near the end of the boom.
[0099] The winches 30 and 35 are in this case arranged on the foot 22 of the vertical column 21, so that the top cable 31 and the lifting cable 36 extend from the associated winch 30, 35 upwards through from hollow vertical column 21 to top cable guide 40 and then in direction to cable guides 43, 44 on boom 24.
[00100] The top cable guide 40 has a rotatable support structure, for example, with one or more race tracks around the top of the column 21 and roller wheels, engaging on the race tracks, of a structural part on which the cable pulley assemblies are mounted. As a result, the top cable guide 40 can follow the rotational movements of the lance around the vertical column 21 and adopt substantially the same angular position as the lance 24.
[00101] The top cable guide 40 may have an associated drive motor assembly, which ensures that the top cable guide 40 follows the rotational movements of the boom 24 around the column 21, but in a non-assembly mode of drive motor is preferred.
[00102] The boom winch 31 and the lifting winch 35 are arranged on a rotary winch support 50, which is rotatable about a geometric axis of rotation substantially parallel with the vertical column 21. The mobile winch support 50, which is movably mounted with respect to the vertical column 21. The winch support 50 is here positioned on the vertical crane structure, preferably in the region of the foot 22 below the circular cross-sectional part of the column 21, and is mechanically uncoupled from there. of the top cable guide 40. The support 50 could, for example, also be arranged on the ship's hull below the column, for example, the foot could have an extension that extends into the hull.
[00103] In the example shown, the winch support 50 is a substantially circular platform, which, in its circumference, is mounted on an annular bearing 51, with the winches 31, 35 arranged on the platform. The annular bearing 51 is, in this case, such that the platform can rotate around a vertical axis that coincides with the geometric axis of rotation of the top cable guide. The bearing can be of any suitable design, including cars that run along a circular track.
[00104] The rotary winch support 50 has an associated drive motor assembly 52 for moving the winch support 50 in such a way that the winch support 50 maintains a substantially constant orientation with respect to the boom 24 in the event of movements of rotation of the boom 24 about the vertical column 21. The orientation of the winch support 50 with respect to the top cable guide 40 likewise remains substantially constant, since its movements are again the consequence of movements of the rotation of the boom. 24.
[00105] Possibly, an additional deepwater winch (not shown) is positioned below the mobile winch holder 50. In the embodiment shown, there is an angle sensor 60 to detect the position of the lance connecting member 26 with respect to the column vertical 21, the drive motor assembly 52 of the winch bracket 50 having associated control means 53 which is in operative contact with the angle sensor 60.
[00106] The winches 31, 35 each have an associated electric (or electro-hydraulic) winch drive motor assembly, which is disposed on the mobile winch support 50. The required electrical power is supplied by generators arranged somewhere on the ship, at a distance from the mobile winch holder 50. One or more sliding contacts (not shown) are provided in the electrical connection between these generators and the winch drive motor assemblies.
[00107] In a variant, which is not shown, the winch bracket 50 can rotate about a vertical axis, this axis being provided with one or more sliding contacts. In such an arrangement, the deepwater cable extends through the center of such axis.
[00108] According to the second aspect of the present invention, a hoisting rope retaining device H is provided on the boom 24, at a location radially inward with respect to the starter pulley 45, radially outward, so that a first hoist rope part 36a of the hoisting rope extends from the jib starter sheave 24 towards the object hoisting device 33 and a second hoist rope hoisting rope part 36b extends away from the from the object suspension device 33 in the direction to the lifting cable retaining device H, wherein the first and second suspension cable portions 36a, 36b extend in a V-shape to each other, at an angle of preferably between 20 and 60°. This is visible in Figure 2A.
[00109] According to a preferred embodiment of the second aspect of the invention, the angle between the first portion 36a and the second portion 36b of the hoisting rope, at a given position of the inner end of the boom 24 and the object suspension device 33 , can be adjusted.
[00110] For this purpose, a lifting cable guide 65 is provided, capable of engaging with the second portion 36b of the lifting cable. The hoisting cable guide 65 is connected to a guide winch 66 and a guide puller 67, wherein the guide winch comprises a jib portion extending between the jib 24 and the hoisting cable guide 65, portion of which jib 66 extends radially outward from the second suspension cable part 36b to be engaged by the hoisting cable guide 65, and wherein the guide handle 67 originates from the operative position of the hoisting cable guide , here from the position near the pedestal of the crane, in particular from the annular support structure. By actuation of the guide winch 66 and the guide puller 67, the lifting cable guide 65 can move between a position adjacent to the boom 24, as seen in Figure 2a, and the operating position of the lifting cable guide 65 , as shown in Figure 2b. In the embodiment shown, both the guide winch 66 and guide puller 67 are incorporated as lifting cables, which can be operated by winches (not shown). In figure 2A, the guide winch has been actuated to place the lift cable guide 65 near the tip of the boom. In particular, the guide winch was driven inwards, while the guide puller 67 was allowed to become slack, largely without any tension being applied to it.
[00111] In Figure 2B, the guide puller 67 has been driven inwards, while the tension on the guide winch 66 is essentially removed. As such, the engaged situation is obtained, as shown, where the second portion 36b of the hoisting rope extends from the object suspension device 33 (not visible in this figure), via the hoisting rope guide 65, which is next to the crane pedestal, for the hoisting rope retaining device H.
[00112] In figures 3A-3C, a third embodiment of a crane ship 1100 according to the present invention is shown. Crane ship 1100 comprises a hull 1101 and a deck 1102. In figure 3a, an object 1110 is positioned on deck 1102, which object must be raised from deck 1102 and lowered into the water W, as shown in figure 3C. Object 1110 is connected to an object suspension device 1140.
[00113] On deck 1102, furthermore, a crane 1120 is provided, comprising a foot 1121 mounted on the deck and a stationary column 1122 mounted on the foot. A rotating bearing 1125 and a rotating top 1130 together form a crane housing which is rotational with respect to the pedestal about a geometric axis of vertical rotation R1. A lance 1124 is provided, the lance 1124 having an inner end 1124a which is pivotally connected about a first axis of horizontal pivot R2 to the rotating bearing 1125. The lance 1124 additionally has a point 1124b, where a starter pulley 1124c is provided.
[00114] A boom lifting device is provided to position the boom 1124; in the embodiment shown comprising a jib lifting cable 1135 extending between the jib 1124, here the jib point 1124b, and the crane housing, here the rotating top 1130.
[00115] The crane 1120 further comprises a multi-leg hoist assembly, which comprises a winch (not visible) and a hoist rope 1136. According to the present invention, a hoist rope retaining device H is provided in the jib 1124 at a distance from starter pulley 1124c on the boom, allowing the hoisting rope 1136 to extend from the winch, via the rotating top 1130, to the starter pulley 1124c on the boom, to the suspension device object 1140, and then to the hoisting rope retaining device H. As such, a first portion 1136a of the hoisting rope, extending from the boom starter pulley 1124c towards the object hoisting device 1140, and a second portion 1136b of the hoisting rope, extending away from the object suspension device towards the hoisting rope retaining device H, extends in a V-shape to each other at an angle which in figures 3a and 3b is too small.
[00116] According to a preferred embodiment, the angle between the first portion 1136a and the second portion 1136b of the hoisting rope, at a given position of the inner end of the boom 1124 and the object suspension device 1140, can be increased, as seen in figure 3c.
[00117] In the embodiment shown, this angle adjustment is achieved because the hoisting rope retaining device H comprises a carriage, which is allowed to move along the boom 1124. For example, a motor device is provided on the carriage, or a winch and cable extends to the car, or any conceivable alternative.
[00118] In Figures 4A-4C, steps of lifting and lowering load using a fourth embodiment of a crane vessel 200 according to the present invention are shown. The modality strongly resembles the modality of Figures 3A-3C, in which a cart is provided as a hoist rope retaining device, but differs in that a different crane configuration is employed.
[00119] The crane vessel 200 comprises a hull 201 and a deck 202. The object 210 is connected to an object suspension device 240.
[00120] On deck 202, a crane 220 is provided, comprising a pedestal 221 mounted on the deck and a crane housing 222 which is rotationally relative to the pedestal 221 about a geometric axis of vertical rotation R1.
[00121] A jib 224 is provided, the jib 224 having an inner end 224a that is pivotally connected about a first axis of horizontal pivot R2 to the crane housing 222. The jib 224 additionally has a tip 224b where the sheave of match 224c is provided.
[00122] A jib lifting device is provided to position the jib 224, in the embodiment shown comprising a jib lifting cable 235 extending between the jib 224, here the jib tip 224b and the crane housing 222, here the top of crane housing 222.
The crane 220 further comprises a multi-leg hoist assembly comprising a winch (not visible) and a hoist rope 236. According to the second aspect of the present invention, a hoist rope retaining device H is provided radially inward on boom 224, at a distance from starter sheave 224c, radially outward of boom, allowing hoist cable 236 to extend from winch, via the top of crane housing 222, to sheave starting 224c of the boom, to the object hanging device 240, and then to the hoisting rope retaining device H. As such, a first hoisting rope hoisting rope portion 236a extending from the sheave of departure 224c of the boom in the direction to the object hanging device and a second part of the lifting cable 236b of the lifting cable extending away from the object hanging device in the pa direction. ra the hoist rope retaining device H extend in a V-shape to each other at an angle which, in figures 4a and 4b, is very small.
[00124] According to a preferred embodiment of the second aspect of the invention, the angle between the first part 236a and the second part of suspension cable 236b, at a given position of the inner end of the boom 224 and the object suspension device 240 , can be enlarged, as shown in figure 4c.
[00125] In the embodiment shown, this angle adjustment is achieved because the hoisting rope retaining device H comprises a carriage, and wherein the carriage is movable along the boom 224.
[00126] In Figure 5, a crane ship 100, as known from the prior art, is shown. The crane ship 100 comprises a hull 102 and a crane 103. The crane ship shown is a monohull ship. The crane 103 comprises a stationary pedestal 4, which is mounted to, or integrally formed with, the hull 102 of the crane ship 100. The hull may be provided with a deck, on which the pedestal may be mounted, in one embodiment. Constructive advantages are possible when the pedestal is formed integral with the hull.
[00127] The crane 103 comprises a crane housing 105 which is adapted to rotate relative to the pedestal 104 around a geometric axis of vertical rotation V. A rotation angle y fi is schematically indicated in figure 1. The crane is, in addition furthermore, provided with a jib 108, comprising an inner end 108a which is pivotally connected about a horizontal pivot axis P to the crane housing 105, allowing an upward movement and rctc dckzq fc ncp>Co Wo âpiwnq fg rkx' β fi guswgocVkecogpVg kpfkecfq pc figure 1. Boom 108 is provided with a starter pulley 108d.
[00128] A boom lifting device 110 extends between the boom 108 and the crane housing 105, adapted to position the boom 108 and actuate the up and down movement of the boom.
[00129] It is noted that, in an alternative embodiment, the pedestal of the crane is incorporated as a fixed mast. In this mode, the crane housing is incorporated as a swiveling platform, adapted to rotate relative to the mast around a geometric axis of vertical rotation, which pivotally supports the inner end of the boom, and a rotating mast head at the top. of the mast. The boom lifting device extends between the boom and the rotating mast head to actuate the up and down movement of the boom.
[00130] The crane 103 further comprises an object suspension device, here incorporated as a hook 111, to which the object which is to be lowered can be connected. Hook 111 is suspended from a lifting cable 115 of a crane lifting assembly. The lifting assembly comprises a winch, which is not visible, but preferably provided on the pedestal 104 of the crane or inside the hull 102 of the ship. The hoist rope 115 extends from the winch, via a pulley 105a on the crane housing 105 and via a starter pulley 108d on the boom 108, to the hook 111. The portion of the hoist rope between the housing of crane 105 and the jib is indicated with reference numeral 115a, and the portion of the hoisting rope between the jib 108 and the object hanging device 111 forms a part of the hoisting rope 115s.
[00131] The crane ship in figure 1 is suitable for lowering an object. The object (not shown) is preferably carried by the ship and positioned on the ship's hull, optionally on the deck. The lowering method comprises the following steps: - positioning the hook 111 above the object by rotating the crane housing and/or actuating the boom lifting cable and actuating the lifting cable 115, - engaging the object by the hook 111 and actuate the lifting winch to raise the object, position the object in an outboard position by rotation of the crane housing and/or actuation of the boom lifting cable, - lower the object into the sea by actuation of the lifting winch and , as such, elongating the suspension cable portion 115s.
[00132] In figures 6-9, the crane ship of figure 1 is shown furthermore provided with a lifting cable guide according to the first aspect of the present invention. The lifting cable guide is shown in an operative position thereof, guiding at least one of the lifting cable portions 115s between the boom 108 and the object lifting device 111. When the object has been lowered into the sea, the object and the object suspension device are no longer visible in figures 6-9. In the operating position of the lifting cable guide, the lifting cable guide provides an engagement point of the suspension cable portion with the crane vessel, in addition to the engagement with the boom. Advantageously, the hitch point created by the hoisting cable guide according to the first aspect of the present invention is closer to the ship's hull, in particular closer to the center of movement of the ship, reducing the effect of ship movements induced by the state of the sea, and the hitch point is lower, in particular closer to the center of gravity, thus improving the stability of the crane vessel.
[00133] In all of the embodiments of figures 6-9, the lifting cable guide is in its operational position, guiding at least one of the suspension cable parts. All of the lifting rope guides shown are positioned in the vertical direction essentially between the horizontal pivot axis of the boom and the bottom of the hull, and in a direction transverse to the ship within 5 meters of one side of the hull, and in the longitudinal direction. along the ship's hull. In particular, in figures 6 and 7, the lifting cable guide is connected to the ship's hull, and in figures 8 and 9 the lifting cable guide is connected to the pedestal of the crane. Yet alternatively, as seen in figure 1G, the lifting cable guide is connected to the crane housing. The same parts are indicated with the same numbers.
[00134] In Figure 6, a movable lifting cable guide 120 is shown. The lifting cable guide 120 is provided on a lifting cable guide carriage 121 engaging about a lifting cable guide track 122 which is provided along the hull 102 of the ship and which extends essentially parallel to the longitudinal geometric axis. L of the ship. A lifting cable guide drive (not visible) is provided to translate the lifting cable guide carriage 120 along the lifting cable guide track 122 in a T direction. This embodiment comprises a lifting cable guide movable 120 allows the suspension cable portion 115s to be brought into engagement with the lifting cable guide 120 by the following steps: - rotating the crane housing 105 so that the suspension cable portion 115s of the lifting cable moves in the direction towards the ship's hull 102, until the suspension cable portion is adjacent to the hoist rope guide track 122, - actuate the hoist rope guide drive to translate the hoist rope guide 120 to the guide of lifting cable 120 reach the suspension cable part 115s, - engage the suspension cable part with the lifting cable guide.
[00135] The position of the lifting cable guide 120, as shown in figure 6, may be an operating position of the lifting cable guide, in which position it is adapted to guide the suspension cable part 115s. It is also conceivable that the position of the lifting cable guide 120, as shown in Figure 6, is an engagement position remote from the operating position. The lifting cable guide drive is capable of moving the lifting cable guide 120 and the suspension cable engaged portion from the engagement position to an operational position. Still alternatively, it is conceivable that multiple operating positions of the lifting cable guide 120 exist, in all of the positions the lifting cable guide is adapted to guide the suspension cable portion. In this mode, the lifting cable guide drive is adapted to move the lifting cable guide 120 and the suspension cable engaged portion from one operating position to another operating position.
[00136] The lifting cable guide 120, as shown in figure 6, is of the type that is adapted to transform between an open configuration (not shown) allowing the suspension cable portion to be placed in engagement with the lifting guide. lifting cable 120 and a closed configuration (as seen in figure 6) in which the suspension cable portion is guided by the lifting cable guide 120, and cannot be removed from the lifting cable guide 120.
[00137] In figure 7, three different modalities of a lifting cable guide are shown schematically, indicated as 125', 125" and 125"'. The lifting cable guide 125" is of the same configuration as the lifting cable guide 120 of Figure 6: adapted to transform between an open configuration and a closed configuration. Still alternatively, the lifting cable guide can be incorporated as a sheave, such as 125' and 125'' hoist rope guides. In this drawing, not only multiple lifting cable guides are shown, but also multiple operating positions of a lifting cable guide. In figure 7, it is visible that the suspension cable part 115s is guided in three different places. Although not shown, similarly to the embodiment of Figure 5, the 125', 125" or 125"' lifting cable guide may be provided on a lifting cable guide carriage engaging over a lifting cable guide track which is provided along the hull of the ship and extending essentially parallel to the longitudinal geometric axis L of the ship. A lift cable guide drive can be provided to translate the lift cable guide carriage along the lift cable guide track.
[00138] In figures 8 and 9, still an alternative cable guide winch 130 is provided on the crane pedestal 104, which is shown in an operational position guiding a suspension cable part 115s. In figure 8, the hoisting rope is provided as a single stranded rope, and the hoisting rope guide 130 which guides the hoisting rope portion 115s of the hoisting rope between the jib starter pulley 108d and the lifting device. object suspension. In figure 9, the lifting cable is provided as a multi-leg cable, which part of the boom at a radially inward location 108i and a radially outward location 108w, the lifting cable comprising a first suspension cable portion 115s ' extending between the object suspension device and the radially outward location 108w of the boom, and one or more second suspension cable portions 115s extending between the object suspension device and the radially inward location 108i. The lifting cable guide 130 guides the second suspension cable portion 115s.
[00139] In one possible method, the suspension cable portion 115s of the lifting cable is brought into engagement with the lifting cable guide 130 by rotation of the crane housing to a position where the boom extends above the lifting guide. lifting cable 130, i.e. perpendicular to the longitudinal axis L of the ship in the shown embodiment, and subsequently actuating the boom lifting cable to move the boom upwards and thus move the suspension cable portion 115s which is to be engaged , in the direction towards the ship's hull, and so in the direction towards the lifting cable guide 130. Optionally, the lifting cable guide 130 is also movable. As such, the crane can move the suspension cable portion close to the lifting cable guide, and the movements of the lifting cable guide allow the suspension cable portion and the lifting cable portion to engage, in one engagement position. This can be an operational position, or alternatively a subsequent optional movement of the hoist rope guide with the hoist rope engaged part can bring the hoist rope guide into its operational position.
[00140] In figures 10a-10e, a portion of a crane ship according to a possible embodiment of the first aspect of the invention is schematically shown in several views: from above in figures 10a - 10c and from the side in figures 10d and 10e. The pedestal 104 is visible, as well as a portion of the hull 102 and water W. On this crane ship, not only a lifting cable guide 135 is provided, but also a lifting cable receiver 140. The lifting cable receiver 140 is provided in the vicinity of the lifting cable guide 135, here a vertical distance below the lifting cable guide 140, as is visible in the side view of Figure 10e. The lifting cable receiver 140 is adapted to receive the suspension cable portion (not shown). Due to sea state induced movements of the ship, the location of the suspended part of rope, suspended from the boom in the vicinity of the hoisting rope receiver 140, may often not be defined more precisely than within a certain circular range. This band, on which the suspension cable guide can be positioned by the crane, in particular by rotation of the crane housing and/or actuation of the boom lifting cable, is indicated with reference numeral 141 in figure 10a. The lift cable receiver 140, furthermore, allows the suspension cable portion to slide into the lift cable guide. Consequently, once when the suspension cable part is received by the hoisting rope receiver, the hoisting rope part can be moved by the crane, in particular by rotation of the crane housing and/or actuation of the boom hoisting rope , and because the hoist rope receiver allows the hoist rope part to be slid along the hoist rope receiver, the hoist rope part can be correctly slid into the hoist rope guide.
[00141] The hoisting cable receiver 140 comprises a funnel-shaped portion, here a triangular portion, comprising a wide end 140a, which is adapted to receive the suspension cable portion, and an opposite narrow end 140b in the direction to the suspension cable part can be slid towards the lifting cable guide 135.
[00142] In the embodiment shown, both the lifting cable guide 135 and the lifting cable receiver 140 are provided movable. In Figures 10c and 10d, the hoist rope receiver 140 is shown in a storage position, in which the hoist rope receiver is stored within the hull 102 of the ship. The hoist cable receiver 140 is movable by a hoist cable receiver drive, not shown in detail. The drive allows the hoist rope receiver 140 to be brought into a position in which the hoist rope receiver extends radially outward with respect to the geometric axis of vertical rotation V of the crane housing.
[00143] The lifting cable guide 135 is also movable between a storage position, visible in Figure 10d, and the operational position, visible in Figure 10a, in particular the position indicated with reference numeral 135'.
[00144] This configuration allows the following procedure to place the suspension cable portion in engagement with the lifting cable guide: - provide the lifting cable receiver 140 in an operational position, that is, from the position of the figure 10c to the position of figure 10b; - rotating the crane housing and/or actuating the boom lifting cable to bring the suspension cable portion of the lifting cable into engagement with the lifting cable receiver, i.e. bring the circle 141 to the wide end 140a of the lifting cable receiver; - actuate the boom lifting cable to slide the suspension cable portion along the lifting cable receiver to the narrow end 140b of the lifting cable receiver, - providing the lifting cable guide 135 to the operating position , radially outside the narrow end 140b of the hoist rope receiver, - engaging the hoist rope part with the hoist rope guide 135.
[00145] In figures 11a-11d, various methods of bringing the suspension cable portion 151 of the lifting cable into engagement with a lifting cable guide 152 are schematically indicated. The situation is always shown from a top view, in which the crane pedestal 104 is visible with the geometric axis of vertical rotation of the crane housing V. The crane rotation is indicated with an arrow 150. In addition, a portion of the hull 102 is visible and the water W. The translational movement of the suspension cable part, which is obtained by pivoting the boom up and down, is indicated with arrows 155.
[00146] In Figures 11a and 11b, a hoisting cable receiver 153 is provided, having a longitudinal geometric axis extending essentially along the hull 102 of the ship. The suspended cable portion 151 is brought into engagement with the hoisting cable receiver 153 by rotating movement 150. Subsequently, the suspended cable portion is allowed to slide along the hoisting cable receiver 153 in the direction 155 by pivoting the boom, to engage with the hoisting cable guide 152, provided stationary. In figures 11a and 11b, directions 155 are oppositely oriented.
[00147] In Figure 11c, a hoist rope receiver 153' is provided, having a longitudinal geometric axis extending essentially perpendicular to the hull 102 of the ship. The suspended cable portion 151 is brought into engagement with the hoisting cable receiver 153' by rotating movement 150, and the suspended cable portion is subsequently allowed to slide along the hoisting cable receiver 153', to enter into engagement with a lifting cable guide 152, provided stationary (not shown in detail).
[00148] In figure 11d, a hoisting cable receiver 153" is provided, having a longitudinal geometric axis extending essentially along the hull 102 of the ship, similar to the embodiment of figure 11b. The suspended cable portion 151 is taken to within the reach of the hoisting cable receiver 153" by rotating movement 150. Subsequently, the suspended cable portion is allowed towards the hoisting cable receiver, to be received by the receiver and subsequently to slide along the receiver of lifting cable 153 in direction 155 by pivoting the boom. As such, the suspended cable part is brought to a known position in the hoisting rope receiver 153". In the embodiment shown, the hoisting rope guide 152 is movable in a direction 154 towards a position of the hanging rope part. on the 153" lifting cable receiver.
[00149] In Figures 12a and 12b, alternative embodiments of a lifting cable guide 160 and 160', respectively, are shown, in combination with alternative embodiments of a lifting cable receiver 165 and 165', respectively. The suspension cable portion 166 is moved by the crane to contact a lifting cable receiver, and slid by the lifting cable receiver towards the lifting cable guide. To prevent the suspended cable portion from disengaging from the lifting cable guide, the suspended cable portion is preferably engaged in all directions. In Figure 12a, this is accomplished by the fact that the suspended cable portion 166, in an operative position of the lifting cable guide 160, is engaged by both the lifting cable receiver 165 and the lifting cable guide 160. Figure 12b, this is accomplished by the fact that the suspension cable part 166 is guided by the lifting cable guide 16' in an operative position thereof in a closed configuration, in which the suspension cable part cannot be removed from the lifting cable guide.
[00150] In figure 13, a schematic cross section of such a hoist cable receiver 160' of figure 12b is visible.

权利要求:
Claims (23)
[0001]
1. Crane ship (1) comprising a hull (2) and a crane, wherein the crane comprises: - a stationary pedestal (5), mounted on or formed integrally with the hull (2) of the crane ship; - a crane housing (6) which is adapted to rotate with respect to the pedestal about a geometric axis of vertical rotation (R1), - a boom (11), comprising an inner end which is pivotally connected about an axis geometric of horizontal pivot (R2) to the crane housing (6), allowing an up and down movement of the boom (11), and comprising a starter pulley (S3; S4), - a lifting device (14) of boom (11) extending between the boom (11) and the crane housing (6), adapted to position the boom (11) and actuate the up and down movement of the boom (11), - a lifting device. object (18), to which an object (10) can be connected, - a lifting assembly comprising a winch (16) and an associated lifting cable (17), the lifting cable extending from the winch (16 ), by means of a starter pulley (S3; S4) on the boom (11), to the object suspension device (18), so that and, in the actuation of the winch (16), the object suspension device (18) can be raised and lowered, whereby the one or more portions of the lifting cable between the boom (11) and the object suspension device ( 18) form one or more suspension cable parts, characterized in that the crane ship is furthermore provided with a lifting cable guide (19) which, in an operational position thereof, is adapted to guide at least one of the suspension cable parts (17b) between the lance (11) and the object suspension device (18); wherein, in the operational position, the lifting cable guide (19) is connected to the crane pedestal, the crane housing (6) or the hull (2) of the ship; and wherein, in the operative position, the lifting cable guide (19) is positioned in a direction transverse to the ship within 5 meters of one side of the hull (2).
[0002]
2. Crane ship (1) according to claim 1, characterized in that the lifting cable is provided as a single branch cable, and in that the lifting cable guide (19) in the operational position thereof , is adapted to guide the hoisting rope part of the hoisting rope between the starter pulley (S3; S4) of the boom (11) and the object hoisting device (18).
[0003]
3. Crane ship (1) according to claim 1, characterized in that the lifting cable is provided as a multi-branch cable comprising one or more first suspension cable parts (17b) extending between the device of object suspension (18) and a radially outward location of the boom (11), and one or more second suspension cable portions (17b) extending between the object suspension device (18) and a radially outward location. inside the lance (11), wherein the lifting cable guide (19), in the operative position thereof, is adapted to guide one or more second suspension cable portions (17b).
[0004]
4. Crane ship (1) according to claim 1, characterized in that, in the operational position, the lifting cable guide (19) is positioned in the vertical direction essentially between the horizontal pivot axis (R2) of the lance (11) and the bottom of the hull (2), and in the longitudinal direction along the hull (2) of the ship.
[0005]
5. Crane ship (1) according to claim 1, characterized in that the lifting cable guide (19) is adapted to transform between an open configuration allowing the at least one part of the suspension cable to be placed in engagement with the lifting cable guide (19) and a closed configuration in which the at least one part of the suspension cable is guided by the lifting cable guide (19) and cannot be removed from the cable guide (19 ) of lifting.
[0006]
6. Crane ship (1) according to claim 1, characterized in that the lifting cable guide (19) is mobile in relation to the hull (2) of the ship.
[0007]
7. Crane ship (1) according to claim 6, characterized in that it further comprises a lifting cable guide drive (19) which is adapted to move the lifting cable guide (19) to a position remote to the operating position, and which is also adapted to move the lifting cable guide (19) and the suspension cable engaged portion from the engaging position to an operating position.
[0008]
8. Crane ship (1) according to any one of claims 6 or 7, characterized in that the lifting cable guide (19) is connected to a guide winch (16) and a guide handle (67) , wherein the guide winch (16) comprises a lance portion (11) which extends between the lance (11) and the lifting cable guide (19), which lance portion (11) which extends radially towards outside the part of the suspension cable which is, or is to be, engaged by the lifting cable guide (19) and where the guide handle (67) originates from the operating position of the cable guide (19) of lifting, so that, by actuation of the guide winch (16) and the guide puller (67), the lifting cable guide (19) can move between a position adjacent to the boom (11) and the operating position of the lifting cable guide (19), wherein the lifting cable guide (19) is adapted to guide a part of the suspension cable.
[0009]
9. Crane ship (1) according to any one of claims 6 or 7, characterized in that the lifting cable guide (19) is provided on a lifting cable guide carriage (121) engaging on a track of lifting cable guide (122) which is provided along the hull (2) of the ship and which extends essentially parallel to the longitudinal geometric axis of the ship, wherein a lifting cable guide drive (19) is adapted for translate the lifting cable guide carriage (121) along the lifting cable guide track (122).
[0010]
10. Crane ship (1) according to claim 1, characterized in that, in the vicinity of the lifting cable guide (19), a lifting cable receiver (140) is provided, which is adapted to receive the suspension cable portion and allow the suspension cable portion to slide into the lifting cable guide (19).
[0011]
11. Crane ship (1) according to claim 10, characterized in that the hoisting cable receiver (140) comprises a funnel-shaped portion comprising a wide end which is adapted to receive the cable portion of suspension, and an opposite narrow end which is provided in the vicinity of the lifting rope guide (19).
[0012]
12. Crane ship (1) according to any one of claims 10 or 11, characterized in that the hoisting cable receiver (140) extends radially with respect to the geometric axis of vertical rotation (R1) of the crane housing (6).
[0013]
13. Crane ship (1) according to any one of claims 10 to 12, characterized in that the hoist cable receiver (140) is movable by a hoist cable receiver drive (140).
[0014]
14. Method of lowering an object (10) from a crane ship into the sea, the crane ship comprising a hull (2) and a crane, wherein the crane comprises: - a stationary pedestal (5), mounted on , or integrally formed with the hull (2) of the ship; - a crane housing (6) which is adapted to rotate with respect to the pedestal about a geometric axis of vertical rotation (R1), - a boom (11), comprising an inner end which is pivotally connected about an axis geometric of horizontal pivot (R2) to the crane housing (6), allowing an up and down movement of the boom (11), and comprising a starter pulley (S3; S4), - a lifting device (14) of boom (11) extending between the boom (11) and the crane housing (6), adapted to position the boom (11) and actuate the up and down movement of the boom (11), - a lifting device. object (18), to which the object (10) can be connected, - a lifting assembly comprising a winch (16) and an associated lifting cable (17), the lifting cable extending from the winch (16 ), by means of a starter pulley (S3; S4) on the boom (11), to the object suspension device (18), so that , in the actuation of the winch (16), the object suspension device (18) can be raised and lowered, whereby the portion of the lifting cable between the boom (11) and the object suspension device (18) forms a or more suspension cable parts (17b), wherein the crane ship is further provided with a lifting cable guide (19) which, in an operative position thereof, is adapted to guide at least one of the parts. suspension cable (17b) between the boom (11) and the object suspension device (18), characterized in that the method comprises the following steps: - positioning the object suspension device (18) above the object (10), - engage the object (10) by the object suspension device (18) and actuate the hoisting winch (16) to raise the object (10), - position the object (10) in an outboard position by rotation of the crane housing (6) and/or actuation of the boom lifting cable (11), - lower the object (10) into the sea by actuation of the hoisting winch (16), - placing a part of the hoisting rope suspension cable in engagement with the hoisting rope guide (19), preferably when the object (10) is lowered below sea level, in particular below of the hull (2) of the ship, - guide at least one of the suspension cable parts (17b) by the lifting cable guide (19) in its operational position; wherein, in the operational position, the lifting cable guide (19) is connected to the crane pedestal, the crane housing (6) or the hull (2) of the ship; and wherein, in the operative position, the lifting cable guide (19) is positioned in a direction transverse to the ship within 5 meters of one side of the hull (2).
[0015]
15. Method according to claim 14, characterized in that it comprises the step of rotating the crane housing (6) and/or actuating the boom lifting cable (11) to place the cable suspension cable part of the cable of lifting gear in engagement with the lifting cable guide (19).
[0016]
16. Method according to any one of claims 14 or 15, characterized in that the lifting cable guide (19) is mobile and in that the suspension cable part is placed in engagement with the cable guide (19 ) lifting by moving the lifting cable guide (19).
[0017]
17. Method according to any one of claims 14 to 16, characterized in that it further comprises a lifting cable guide drive (19) which is adapted to move the lifting cable guide (19) to a position remote to the operative position, and which is also adapted to move the lifting cable guide (19) and the suspension cable engaged portion from the engagement position to an operative position, wherein the suspension cable portion is placed in engagement with the lifting cable guide (19) by: - actuating the lifting cable guide (19) drive to move the lifting cable guide (19) to an engaging position to the cable guide ( 19) of lifting reach the suspension cable part, - engage the suspension cable part with the lifting cable guide (19), move the lifting cable guide (19) and the engaged part of the suspension cable of the engagement position to an operational position.
[0018]
18. Method according to any one of claims 14 to 16, characterized in that the lifting cable guide (19) is connected to a guide winch (16) and a guide handle (67), in which the guide winch (16) comprises a lance portion (11) which extends between the lance (11) and the hoisting cable guide (19), which lance portion (11) extends radially outwardly of the lifting part. suspension cable which is, or must be, engaged by the lifting cable guide (19) and wherein the guide handle (67) originates from the operating position of the lifting cable guide (19) at whereas, prior to engagement of the object (10) by the object suspension device (18), the guide winch (16) is actuated to move the lifting cable guide (19) to a position adjacent to the boom (11), and wherein, after the object (10) has been lowered into the sea, the guide puller (67) is actuated to move the lifting cable guide (19) to an operative position, to place the cable part. lifting cable suspension in engagement with the lifting cable guide (19).
[0019]
19. Method according to any one of claims 14 to 16, characterized in that the lifting cable guide (19) is provided on a lifting cable guide carriage (121) engaging on a cable guide track (122) a hoist which is provided along the hull (2) of the ship and which extends essentially parallel to the longitudinal geometric axis of the ship, wherein a hoisting cable guide drive (19) is adapted to translate the hoist carriage. lifting cable guide (121) along the lifting cable guide track (122), and wherein the lifting cable is brought into engagement with the lifting cable guide (19) by: - rotating the lifting housing. crane (6) so that the suspension cable part of the hoisting rope moves towards the hull (2) of the ship, until the hoisting rope part is adjacent to the hoisting rope guide track (122) , - actuate the lifting cable guide (19) drive to translate the lifting cable guide (19) to the lifting guide lifting cable (19) reaches the suspension cable part, - engage the suspension cable part with the lifting cable guide (19).
[0020]
20. Method according to any one of claims 14 to 19, characterized in that, in the vicinity of the lifting cable guide (19), an elongated lifting cable receiver (140) is provided which is adapted to receive the suspension cable portion and allowing the suspension cable portion to slide into the lifting cable guide (19) where the suspension cable portion is placed in engagement with the lifting cable guide (19) by : - provide the hoist rope receiver (140) in an operational position, - rotate the crane housing (6) and/or actuate the boom hoist rope (11) to place the suspension rope part of the hoist rope lifting in engagement with the lifting cable receiver (140), - rotate the crane housing (6) and/or boom lifting cable actuation (11) to slide the suspension cable portion along the cable receiver lifting bracket (140) to the lifting cable guide (19), - engaging the suspension cable part with the cable guide (19) of lifting.
[0021]
21. Method of lowering an object (10) from a crane ship into the sea, where use is made of a crane ship as defined in any one of claims 1 to 13, the method characterized by the fact that it comprises the following steps : - position the object suspension device (18) above the object (10), - engage the object (10) by the object suspension device (18) and actuate the hoisting winch (16) to raise the object (10 ), - position the object (10) in an outboard position by rotation of the crane housing (6) and/or actuation of the boom lifting cable (11), lower the object (10) into the sea by actuation of the hoisting winch (16), - increase the angle between the first and second suspension cable parts (17b).
[0022]
22. Method according to claim 21, characterized in that the angle between the first and second suspension cable portions (17b) is increased by placing a suspension cable portion of the lifting cable in engagement with the lifting guide. lifting cable (19), preferably when the object (10) is lowered below sea level, in particular below the hull (2) of the ship, and subsequently guiding at least one of the suspension cable parts (17b) by the guide. of lifting cable (19) in its operating position.
[0023]
23. Method according to claim 21, characterized in that the angle between the first and second parts of suspension cable (17b) is increased by moving the carriage along the boom (11).

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同族专利:

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CN104520226B|2017-02-22|

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US20150151953A1|2015-06-04|

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法律状态:
2018-12-04| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

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2020-02-04| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

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2021-05-11| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

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2021-07-06| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 02/08/2013, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

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申请号 | 申请日 | 专利标题

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NL2009287|2012-08-06|

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NL2009287|2012-08-06|

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NL2010721|2013-04-26|

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NL2010721|2013-04-26|

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PCT/NL2013/050576|WO2014025253A1|2012-08-06|2013-08-02|Crane vessel|

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