• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    underwater valve actuator having visual valve position indicator connected to a manual intervention axis. an underwater valve actuator is disclosed, which comprises an intervention shaft (6) that extends from inside an actuator housing (1) filled with fluid and pressure compensated to the outside of it by means of a bearing and seal (7), in which a visual valve position indicator (14) is arranged outside the actuator housing. the visual indicator (14) is pivotally mounted on the intervention axis and guided in a non-rotating manner to be forced in an axial displacement on the intervention axis, when the intervention axis is rotated, where the assembly of the visual indicator (14) l on the intervention shaft (6) is surrounded by an indicator assembly housing (19) filled with fluid and pressure compensated that surrounds the intervention shaft (6) in relation to the seal (26) outside the actuator housing (1).
    公开号:BR112012009210B1
    申请号:R112012009210-3
    申请日:2010-10-19
    公开日:2020-07-14
    发明作者:Borchgrevink Christian；Flidh Jon
    申请人:Vetco Gray Scandinavia As；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION
    [001] The present invention relates to an underwater valve actuator comprising an intervention shaft that reaches, from within an actuator housing filled with fluid and having pressure compensated, the exterior of said housing through an arrangement of bearing and seal, where a valve position indicator is arranged to be visible outside the actuator housing. BACKGROUND OF THE INVENTION
    [002] Basically, valves for subsea production fluids operate at great depths and under corresponding high pressure, low temperature and in conditions of poor visibility. Accurate valve operation is crucial and failure can result in lost production, environmental pollution or safety risks. A subsea valve is typically controlled remotely via valve actuators that are hydraulically or electrically driven to move the valve between open, closed and any intermediate positions. The valve position can be controlled remotely by means of a position sensor arranged on the actuator and connected to a control center, in a host installation. In the event of a failure in the valve positioning system or the valve position detection function, subsea valve actuators are often arranged for manual valve displacement by replacing the normal actuator drive system in response to a visual inspection of the valve position, which are both carried out on site by divers or remotely operated vehicles (ROV).
    [003] Submarine valve actuators with manual override and visual means indicating position are previously known. Examples are found in EP 0 384 607 A1, US 2003/0116200 A1, US 6 487 960 B1, US 4 213 480 A, for example.
    [004] In a prior art valve actuator, the manual override comprises an intervention shaft that engages the drive system and extends from a pressure compensated actuator housing with a shaft end that is accessible for displacement valve manual. An indicator for the position of the valve is likewise accessible for visual inspection of the exterior of the actuator housing. The visual indicator comprises an indicator needle connected to a shaft that extends into the actuator housing and is connected to the drive system by means of pinion and reduction gears. In addition to a mechanically complex structure to ensure synchronization between valve movement and the corresponding indicator reading, each penetration of the actuator housing involves a potential risk for seawater ingress, or the risk of leakage from the actuator housing that it is typically filled with oil or grease. BRIEF DESCRIPTION OF THE INVENTION
    [005] The present invention aims at reducing the mechanical complexity of the previous underwater valve actuator by having a manual override and a valve position indicator, which is visually readable from outside an actuator housing.
    [006] Another objective of the present invention is to reduce the number of penetrations in the subsea valve actuator housing having manual control and a valve position indicator, which is visually readable from the outside of the actuator housing.
    [007] The objectives are to be found in an underwater valve actuator as presented above, which comprises a visual indicator of the valve position disposed outside the actuator housing and mounted articulated to the intervention axis and guided in a non-rotating way to be forced in axial displacement on the intervention axis when the intervention axis is rotated, in which the assembly of the visual indicator on the intervention axis is enclosed in an indicator assembly compartment, filled with fluid and with compensated pressure, which surrounds the intervention in a sealing relationship outside the actuator housing.
    [008] By the combined arrangement of the intervention facilities and visual indicator outside the actuator housing, an arrangement of non-complex mechanical structure is obtained. Through the pressure compensation arrangement, a visual indicator is created that is protected from sea water, and that operates without being affected by pressure and pressure differentials. No further penetration of the actuator housing wall is required beyond the inevitable passage of the intervention shaft.
    [009] In a preferred embodiment of the invention, the intervention axis is formed with a flow passage through which fluid flow communication is established between the pressure compensated interior of the actuator housing and the interior of the indicator mounting compartment .
    [010] In another advantageous embodiment of the invention, the indicator mounting compartment is in fluid flow communication with an external pressure compensator. The external pressure compensator can be located in an indicator housing included in a penetrator set adapted for the insertion of the intervention shaft inside the actuator housing.
    [011] The indicator mounting compartment preferably comprises a first fluid-filled chamber that is separated from a second fluid-filled chamber through a carrier that is mounted in a rotary-to-linear motion conversion coupling with the axis of intervention.
    [012] Advantageously and preferably, the carrier is mounted in a threaded coupling with the intervention shaft. An alternative embodiment provides for a carrier formed with a pin that engages a helical groove formed on the periphery of the intervention axis.
    [013] In a preferred embodiment, the indicator mounting compartment comprises a first fluid-filled chamber, which is separated from a second fluid-filled chamber through a carrier that is mounted on a rotary-to-motion conversion coupling - linear with the intervention axis, in which each of said first and second chambers communicates with the interior of the actuator housing through the flow passage formed on the intervention axis.
    [014] The flow passage on the intervention axis can be carried out as an axial hole that mounted on the inner end of the intervention axis, connecting with the indicator mounting compartment through transverse holes that mounted on the periphery of the intervention axis inside the first and second chambers, respectively. Multiple and at least two transverse holes (21) are preferably arranged to be assembled within each of the first and second chambers (22; 23).
    [015] The measures described provide fluid flow in and out of the first and second chambers, the volumes of which will vary in response to the axial displacement of the indicator carrier when the intervention axis is rotated.
    [016] An alternative embodiment, however less preferred for sealing purposes, provides for a flow passage arranged as an axial groove cut out of the surface of the intervention shaft.
    [017] In addition, in order to allow fluid flow unimpeded between the first and second chambers, one or more flow passages can additionally be formed through the carrier. Fluid flow communication between the first and second chambers can, in addition or alternatively, be established as fluid flow through a self-cleaning threaded coupling between the carrier and the intervention shaft.
    [018] In the preferred embodiment of the invention, the first and second chambers are defined by extensible / compressible bellows that surround the intervention axis, each bellows connected at one end to the carrier and following its movement, and at the opposite end connected in a manner stationary to a base portion of an indicator housing.
    [019] In a preferred embodiment, the wearer is operationally connected to an indicator needle that is driven by the wearer to move in linear motion along a scale.
    [020] In another preferred embodiment, the wearer is pivotally connected to a needle indicator which is actuated by the wearer to move in rotation on an arcuate scale.
    [021] In both embodiments, the indicator needle is extended to reach through a wall of the indicator housing and the scale is arranged outside the indicator housing.
    [022] The indicator mounting compartment can be arranged in an indicator compartment forming a penetrator assembly that is connectable to the actuator housing and, through which the intervention shaft is inserted into the actuator housing. An inner end of the indicator housing carries the bearing and sealing arrangement, while the outer end of the indicator housing carries a corresponding sealing arrangement and a cushion for the intervention shaft. BRIEF DESCRIPTION OF THE DRAWINGS
    [023] The invention will be explained below with reference to the drawings, where:
    [024] Figure 1 is a side view of a prior art valve actuator that comprises a manual override and visual indicator of the valve position;
    [025] Figure 2 is a partially sectioned side view of the intervention assembly and visual valve position indicator according to the present invention, schematically illustrating an embodiment of the invention, and
    [026] Figure 3 is a corresponding view illustrating another embodiment of the intervention set and visual valve position indicator. DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
    [027] A hydraulically operated subsea valve actuator included in the prior art is shown in Figure 1, which comprises valve displacement components arranged for displacement of a valve (not shown) between the open and closed positions. The valve displacement components are placed between an actuator housing (1) which is arranged for connection to an underwater valve. An intervention shaft (2) and a visual valve position indicator (3) are separately inserted into the actuator housing through sealing arrangements (4) and (5), each of which provides a barrier between the marine environment and the interior of the actuator housing filled with fluid and pressure compensated (1). Within the actuator housing, the intervention shaft (2) and the visual indicator (3) are connected, each separately and operatively, to the valve displacement mechanism through pinion and reduction gear sets.
    [028] The combination of intervention and visual indicator on a valve actuator according to the present invention is illustrated schematically in Figure 2. An intervention axis (6) is introduced into an actuator housing (1) through an arrangement of bearing and seal (7). An inner end of the intervention shaft carries a pinion gear (8) that engages a ring gear included in a rotary valve displacement mechanism. The opposite or outer end of the intervention shaft (6) has a standard dimension shaft end (9) that is exposed and accessible for manual rotation of the intervention shaft and the valve displacement mechanism, thereby replacing the normal disc of the valve displacement mechanism. Axially within the end (9) of the axis, the intervention axis (6) is rotatably moved to (10) in a base portion (11) included in the indicator housing, generally identified by the reference signal (12). The base portion (11) is attached to the end of the wall (13) of a housing indicator that involves an axial length of the intervention axis, basically between the bearing and the sealing arrangement (7) and the base portion (11 ). The indicator housing (12) represents a set of penetrator that is connectable to the actuator housing and through which the intervention shaft (6) is introduced into the pressure compensated housing of the actuator.
    [029] A visual position indicator means, in the drawings of Figures 2 and 3, generally identified by the reference number (14), comprises a carrier (15) that has an internal threaded through hole, and through which the means indicator (14) is mounted on a threaded coupling with an externally threaded portion (16) formed on the intervention axis (6). The carrier (15) is guided non-rotatingly through an element (17) that projects to be received for sliding movement in a groove (18) that is formed through the wall (13) of the indicator housing (12). The carrier (15) is thus forced for axial displacement on the intervention axis, when the intervention axis is rotated. The synchronization between the reading or displacement length of the carrier (15) and the number of rotations of the intervention axis required to move the valve between completely open and completely closed positions, is determined by the angle of the threads and can be adjusted for application in the valve in question.
    [030] The mounting of the indicator means (14) on the intervention axis (6) is protected from contact with sea water through an indicator mounting compartment (19), which essentially involves the axial length from the intervention axis internally to the indicator housing (12). The internal pressure in the indicator mounting compartment (19) is adjusted to the water pressure of the marine environment. In the illustrated example, the indicator mounting compartment (19) is filled with a fluid in flow communication with the fluid-filled and pressure-compensated interior of the actuator housing (1). This flow communication is established through a flow passage (20), which is formed as a hole in the intervention axis (6). The flow passage (20) is mounted on the inner end of the intervention shaft, and is connected to the interior of the indicator mounting compartment (19) through transverse holes (21) that are mounted on the surface of the intervention shaft. Notably, the holes (21) are arranged to be fitted on each side of the carrier (15), the carrier forming a partition element that separates a first chamber (22) from a second chamber (23) of the indicator mounting compartment ( 19). In order to establish flow communication with the interior of the actuator housing, regardless of the position of the carrier (15) on the intervention axis (6), multiple holes (21) can be arranged axially separated on the intervention axis.
    [031] Preferably, the first and second chambers are defined, as illustrated, through the first and second expandable / compressible bellows (24) and (25), respectively. The bellows (24) and (25) are connected at a respective end in a watertight manner to the carrier (15), following it under expansion and compression as the carrier is moved over the intervention axis. At the opposite ends, the bellows are stationary and watertight connected to the indicator housing (12). The intervention shaft (6) exits the indicator mounting compartment (19) through a seal (26) which is fitted into a base portion (27) to which the stationary bellows end (25) is attached. The stationary end of the bellows (24) can be correspondingly connected to a base portion (28), or connected to the bearing and seal arrangement (7) through which the drive shaft (6) enters the actuator housing (1). The intervention axis (6) thus passes through the indicator mounting compartment (19) in a sealing relationship.
    [032] The bellows' volumes thus shift in response to the rotation of the intervention axis. In order to further guarantee fluid flow without restrictions outside and inside the variable volume chambers, flow passages (29) are preferably and additionally formed through the carrier (15) to provide the flow of fluid between the first and second chambers defined through the bellows (24) and (25).
    [033] The indicator means (14) comprises an indicator needle moving with the carrier (15). In a preferred embodiment, shown in Figure 2, an indicator needle (30) is operationally connected to the carrier (15) and reaches the outside of the indicator housing through a groove in the wall (13) of the indicator housing, in order in order to be moved by the carrier in a linear movement along a scale (31) which is arranged outside the indicator housing (12). For illustration purposes, the scale (31) is shown in the drawing as indication marks raised from the outer surface of the indicator housing. VIABLE MODIFICATIONS OF THE ILLUSTRATED ACCOMPLISHMENTS
    [034] Modifications to the above embodiment are possible. Instead of an indicator needle (30) moving linearly along a scale (31), an alternative indicator needle (32) can be arranged pivotally attached to the carrier (15), in order to be moved by the carrier in a rotating motion along an arcuate scale (33), as shown in Figure 3. In the drawing, the reference number (34) refers to an element of a connection mechanism that articulates the carrier in an axial plane through the axis of intervention. The connecting element (34) converts the axial displacement of the carrier (15) to a pivoted movement of the indicator needle (32), while, on the other hand, a portion (35) of the carrier (15) protrudes into a guide (36) which prevents the rotation of the carrier with the intervention axis (6).
    [035] As an alternative to a threaded coupling between the carrier (15) and the intervention axis (6) as described, an embodiment is envisaged in which a rotary-to-linear motion conversion coupling is performed as a combination of pin and socket, in which a pin in the carrier engages a helical groove formed on the surface of the intervention shaft, for example.
    [036] In another alternative embodiment, see Figure 3, the flow communication through the overlap axis is omitted and the pressure compensation is, differently, performed through an external pressure compensator (37) in flow communication ( 38) with the interior of the indicator mounting housing (19). In this embodiment, an external pressure compensator can be arranged inside as shown, or outside the indicator housing (12) if appropriate.
    [037] It is also conceivable to establish the flow communication between the first and second chambers of the indicator mounting compartment (19) as a leakage flow through self-cleaning threads in the mounting of the indicator means (14) on the axis of intervention.
    [038] As an alternative to the bellows (24) and (25), for example, an indicator mounting compartment can be made as rigid cylinders, arranged opposite each other reaching with an open end an interposed carrier that is designed to move similar to a reciprocating piston in the cylinders, in response to the rotation of the intervention shaft.
    [039] Instead of a central hole through the intervention shaft, the flow communication between the indicator mounting compartment and the actuator housing can alternatively be carried out through an axial groove on the surface of the intervention shaft, by example.
    [040] Although described in relation to a pinion gear unit it should be understood, that the present invention is not limited to an angular arrangement of the intervention shaft and a visual indicator, but is equally applicable to axial and axially displaced and parallel installations .
    [041] Through the measures described above, an underwater valve actuator is provided that is reliable, both in both aspects of operation, resulting from the combined intervention and visual indicator of non-complex mechanical structure, and in aspects of its handling as a result high accessibility for monitoring and manipulation of the valve position by divers or by means of vehicles operated remotely in an underwater environment.
    权利要求:
    Claims (15)
    [0001]
    1. SUBMARINE VALVE ACTUATOR comprising an intervention shaft (6) that extends from inside an actuator housing (1) filled with fluid and pressure compensated to the outside of it by means of a bearing and sealing arrangement ( 7), where a visual valve position indicator (14) is arranged outside the actuator housing, the visual indicator (14) pivotally mounted to the intervention axis and guided in a non-rotating manner to be forced into axial displacement over the intervention axis, when the intervention axis is rotated, in which the assembly of the visual indicator (14) on the intervention axis (6) is fitted in a liquid-filled, pressure compensated indicator assembly compartment (19) that involves the intervention axis (6) in relation to the seal (26) outside the actuator housing (1), characterized in that the intervention axis (6) has a flow passage (20), through which flow communication is established fluid between the interior of the housing of the pressure compensated actuator (1) and the interior of the indicator mounting compartment (19).
    [0002]
    ACTUATOR according to claim 1, characterized in that the indicator mounting compartment (19) is in fluid flow communication with an external pressure compensator (37).
    [0003]
    ACTUATOR according to claim 2, characterized in that the external pressure compensator (37) is located in an indicator housing (12) included in a set of penetrator adapted for the insertion of the intervention axis (6) in the housing of actuator (1).
    [0004]
    ACTUATOR according to any of claims 1 to 3, characterized in that the indicator mounting housing (19) comprises a first chamber (22) filled with fluid which is separated from a second chamber (23) filled with fluid through a carrier (15) which is mounted on a rotary-to-linear conversion coupling with the intervention axis (6).
    [0005]
    ACTUATOR according to claim 1, characterized in that the indicator mounting compartment (19) comprises a first chamber (22) filled with fluid which is separated from a second chamber (23) filled with fluid through a carrier (15 ) which is mounted on a rotary-to-linear conversion coupling with the intervention axis (6), in which each of the aforementioned first and second chambers communicates with the interior of the actuator housing (1) through the passage of flow (20) on the intervention axis.
    [0006]
    ACTUATOR according to claim 5, characterized in that the flow passage (20) on the intervention axis (6) is an axial hole that is mounted on the inner end of the intervention axis, connecting with the indicator mounting compartment ( 19) through transverse holes (21) that are mounted on the periphery of the intervention axis within the first and second chambers (22, 23), respectively.
    [0007]
    ACTUATOR according to claim 6, characterized in that the multiples and at least two transverse holes (21) are arranged to be mounted within each of the first and second chambers (22; 23), respectively.
    [0008]
    ACTUATOR according to any of claims 4 to 7, characterized in that the at least one flow passage (29) is formed through the carrier (15), allowing the flow of fluid between the first and the second chambers (22; 23 ).
    [0009]
    ACTUATOR according to any of claims 4 to 8, characterized in that the first and second chambers (22, 23) are defined by extensible / compressible bellows (24, 25) around the intervention axis, each bellows connected in a end to the carrier (15) and connected at the opposite end stationarily to a base portion of an indicator housing (12).
    [0010]
    ACTUATOR according to any of claims 4 to 9, characterized in that the carrier (15) is mounted on threaded coupling with the intervention shaft (6).
    [0011]
    ACTUATOR according to claim 10, characterized in that fluid leaks between the first and second chambers (22; 23) of the indicator mounting compartment (19) are permitted through a self-cleaning screw coupling between the carrier (15 ) and the intervention axis (6).
    [0012]
    ACTUATOR according to any of claims 4 to 11, characterized in that the carrier (15) is operationally connected to an indicator needle (30) which is actuated by the carrier to move in linear motion along a scale (31).
    [0013]
    ACTUATOR according to any of claims 4 to 11, characterized in that the carrier (15) is pivotally connected to an indicator needle (32) which is actuated by the carrier to move in a pivoting motion on an arcuate scale (33).
    [0014]
    ACTUATOR according to any one of claims 12 to 13, characterized in that the indicator needle (30; 32) extends through a wall (13) of the indicator housing (12), and in which the scale (31; 33 ) is arranged outside the indicator housing.
    [0015]
    ACTUATOR according to any one of claims 1 to 14, characterized in that the indicator mounting compartment (19) is arranged in an indicator housing (12) forming a penetrating assembly that is connectable to the actuator housing (1) and , through which the intervention shaft (6) is inserted into the actuator housing, the indicator housing (12) bearing the bearing and sealing arrangement (7) at one inner end and, at an outer end bearing a corresponding sealing arrangement (26) and a cushion (10) for the intervention shaft (6).
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    同族专利:
    公开号 | 公开日
    BR112012009210A8|2020-05-19|
    EP2491287A1|2012-08-29|
    AU2010309493A1|2012-05-17|
    NO20093189A1|2011-04-26|
    PL2491287T3|2019-03-29|
    EP2491287A4|2017-02-15|
    US9103459B2|2015-08-11|
    MY156116A|2016-01-15|
    CN102725573A|2012-10-10|
    WO2011048469A1|2011-04-28|
    US20120234410A1|2012-09-20|
    AU2010309493B2|2014-10-30|
    EP2491287B1|2018-06-27|
    CN102725573B|2016-06-29|
    BR112012009210A2|2017-06-20|
    NO338078B1|2016-07-25|
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    法律状态:
    2019-01-08| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2019-08-06| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|
    2020-04-22| B09A| Decision: intention to grant|
    2020-07-14| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 19/10/2010, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    NO20093189A|NO338078B1|2009-10-21|2009-10-21|Submarine valve actuator with visual valve position indicator connected to a manual override shaft|
    NO20093189|2009-10-21|
    PCT/IB2010/002670|WO2011048469A1|2009-10-21|2010-10-19|Subsea valve actuator having visual manual position indicator connected to a manual override shaft|
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