• 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:
    : Device for flushing liquid seal (5,6) in a rock drilling machine comprising an annular elastic sealing device comprising partly means for abutment in a seat arranged in a flushing housing, partly means for sealing abutment against a surface of a part (2) movable in the flushing housing. The flushing fluid sealing device (5, 6) includes an anode device (11, 12) with at least one flushing fluid contacting anode assembly, and the anode device has means (16, 16 ', 16 ", 16"') for establishing electrical contact with the bobbin case. The invention also relates to a method, a bobbin case and a rock drilling machine. Fig. 3
    公开号:SE1250029A1
    申请号:SE1250029
    申请日:2012-01-19
    公开日:2013-07-20
    发明作者:Anders Persson
    申请人:Atlas Copco Rock Drills Ab；
    IPC主号:
    专利说明:

    15 20 25 30 easily during re-entry due to said corrosion attack on the neck adapter.
    An additional problem is the risk of serious damage to the neck adapter, and especially in the area of the said radial flushing holes, as corrosion damage can result in instructions for fatigue failure. The occurrence of such breaks can lead to serious damage to and downtime of the drill.
    As an example of the prior art, mention may be made of WO 03078788, which relates to a method for protecting corrosion-sensitive parts in a rock drilling equipment against corrosion, wherein a neck adapter is coated with special protective substances.
    OBJECTS AND MOST IMPORTANT CHARACTERISTICS OF THE INVENTION An object of the present invention is to provide an apparatus and a method in which the problems of the technique discussed above are at least alleviated.
    This object is achieved in that the device for flushing liquid sealing includes an anode device with at least one sacrificial anode unit intended for contact with flushing liquid.
    By providing the device itself for flushing liquid sealing with an anode device, which functions as a sacrificial anode, several significant advantages are achieved. An important aspect in connection with the invention is that it is possible to change the anode material in an efficient and simple manner during regular replacements of the sealing devices in the drilling machine, which are nevertheless planned, which provides great handling advantages.
    Typically, conventional seals are replaced at short intervals from about 24 hours to about 100 hours. Through the invention, however, it can be expected that the service life of the seals will be longer and that thus the service intervals can be longer, leading to better economy for a rock drilling machine utilizing the invention. 77078 20120119; 2012-01-19 10 15 20 25 30 In a device according to the invention, there is thus no need for an extended service measure such as e.g. to replace further details in the drilling machine since the corrosion protection is obtained by an anode device arranged in connection with said sealing device. In addition, the anode device will advantageously be located in the vicinity of the area to be protected against corrosion attack while ensuring that a calculated sufficient amount of anode material is present and that this is sufficiently exposed to the flushing liquid.
    Nor does the invention create any restriction or influence on the rinsing liquid flow, which could impair the conditions for efficient rinsing.
    Preferably, the anode device has means for establishing electrical contact with the drill housing. Such means may be sheets or conduit portions in the form of metal cables or the like, which are connected to contact surfaces in the drill housing. The means for establishing electrical contact can, however, alternatively also simply be clamped between the sealing device and the drill housing. It is not excluded that there are also means for directly contacting sealing surfaces on the neck adapter.
    One possibility of achieving such direct contact with the neck adapter would be to provide an inner portion of the surface of the flushing fluid seal abutting the movable part / neck adapter with a ball conductor or equivalent for establishing said electrical contacts with the neck adapter but to avoid metal-to-metal contact.
    As an alternative to comprising means for establishing contact with the machine housing and / or the moving part in the form of e.g. a neck adapter may be arranged to impose a suitable potential between an anode device and some suitable part of the rock drilling machine through an electrical circuit. 77078 20120119; 2012-01-19 10 15 20 25 30 Because the sealing device is designed with one or more recesses for fixed reception of the device, an anode device can e.g. is pressed into such a recess, which may, for example, be in the form of an annular groove, whereby the anode device may have a corresponding annular structure, possibly with sacrificial device units distributed over its circumference.
    The placement of the anode device in the sealing device can take place before the installation of the device for flushing liquid sealing in the drilling machine housing. Alternatively, the anode device can be placed in the sealing device after it has been inserted in its seat in the drill housing. In the latter case, as a rule, the overall device can be more easily placed in its seat in the drill housing due to the fact that each of the parts' individually greater flexibility relative to the flexibility of the composite device more easily allows a suitable deformation, which may be necessary for to enable practical placement. With the anode device inserted, the device for flushing liquid sealing can thus be stiffer and less easy to handle than each part separately.
    The device according to the invention can also be designed so that the sealing device at least partially encloses the anode device. This can e.g. be done by the anode device being at least partially molded into the sealing device from the beginning.
    In a special embodiment of the invention, the device for flushing liquid sealing is designed integrated with a bearing device for controlling a neck adapter. This is especially the case when it comes to said bearing device being a plastic bushing, which can thus be made in one piece with said sealing device.
    Preferably, the anode device comprises a plurality of electrically and / or mechanically connected sacrificial anode units in order to achieve safe function. In a variant of this, the anode device consists of a flexibly arranged string, e.g. in the form of 77078 20120119; 2012-01-19 10 15 20 25 30 a helically wound helical wire of a sacrificial anode material.
    Because the amount or mass of said sacrificial anode units is dimensioned for expected consumption during the service life of the sealing device, the amount of material can be adjusted and over- or under-dimensioning can be avoided.
    The invention also relates to a method for manufacturing a device according to the invention, with an annular elastic sealing device comprising partly means for abutment in a seat arranged in a drilling machine housing, and partly means for sealing abutment against a surface of a part movable in the drilling machine housing, wherein the flushing liquid sealing device is provided with an anode device with at least one sacrificial anode unit intended for contact with flushing liquid, and the anode device being provided with means for establishing electrical contact with the drilling machine housing.
    In particular, the anode device is received fixed by at least one recess in the sealing device. In this case, the sealing device is typically caused to at least partially enclose the anode device.
    The invention also relates to a flush housing for a rock drilling machine comprising at least one device as above and a rock drilling machine comprising at least one such device.
    In a particular embodiment, an electrical circuit is established which applies a suitable electrical potential between the anode device with sacrificial anode units and the machine housing.
    Further advantages and features of the invention will become apparent from the following detailed description of embodiments.
    BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described in more detail with reference to exemplary embodiments and with reference to the accompanying drawings, in which: 77078 20120119; 2012-01-19 10 15 20 25 30 Fig. 1 shows in an axial section a detail of a rock drilling machine with a device for flushing liquid sealing according to the invention.
    Fig. 2 shows the coil housing in Fig. 1 in a perspective view.
    Figs. 3 and 3a show a device for flushing liquid sealing in a perspective view and in section, respectively.
    Figs. 4 - 6 show alternative devices for flushing liquid sealing according to the invention in section.
    Fig. 7 is a diagram of a method sequence according to the invention.
    DESCRIPTION OF EMBODIMENTS Fig. 1 shows an axial section through a front part of a rock drilling machine 1. A neck adapter 2, which constitutes the first, upper element in a drill string, is supported by the rock drilling machine 1 in a manner known per se. A flushing housing 3, in principle constituting an internal flushing fluid swivel, comprises a flushing chamber 4 and a first and a second device for flushing liquid seal 5 resp. The flushing fluid sealing devices 5 and 6 seal the flushing chamber 4 against a drill guide bushing 10 and against the rotation and percussion mechanisms associated with the rock drilling machines, respectively. These parts are of a conventional type and are therefore not described in more detail here.
    Denoted by 7 is a flushing fluid inlet from a pump (not shown) to the flushing chamber 4. Each of the flushing fluid sealing devices 5 and 6 comprises an elastic sealing device and is equipped with an anode device 11 and 12, respectively, which contain sacrificial anode material to provide galvanic protection. against corrosion on otherwise exposed parts of the rock drilling machine. The flushing fluid seal devices 5 and 6 are located in their respective seats 22 in the drilling machine and seal by means of sealing abutment means, in the form of a respective sealing lip, against a respective surface of the neck adapter; 2012-01-19 10 15 20 25 30 tern 2, which constitutes a movable part in the drilling machine housing, and which is thus movable relative to the respective device for flushing fluid sealing by rotational movements and limiting axial movements by percussion action, etc.
    The neck adapter 2 has an axial flushing channel 8, which is connected to a drill bit (not shown) and at least one radial flushing heel 9, through which flushing liquid present in the flushing chamber 4 is passed on to the axial flushing channel 8.
    In Fig. 2, the flushing housing 3 is shown as a separate unit with respective devices for flushing fluid seals 5 and 6, the flushing chamber 4 and the flushing fluid inlet 7 indicated.
    Fig. 3 shows a device for flushing liquid seal 5, in more detail, in a perspective view, wherein an elastic sealing device has a recess 13 in the form of a canceled groove, which is arranged for receiving an anode device 11 comprising a plurality circumferentially distributed sacrificial anode units 14, which are interconnected by an electrically conductive annular tree or wire, a band, a helical tree or the like. The device 5 has an outer casing surface 18 for abutment in said seat in the flushing housing, a side 21 facing the flushing chamber and a rear preferably flat surface 19, facing away from said flushing chamber. At least one of the sacrificial anode units 14 is provided with means for establishing electrical contact with the drill housing in the form of a plate or the like 16 placed on said outer casing surface 18 and a conduit 15 between the respective sacrificial anode unit 14 and said plate 16. When mounting the device for flushing fluid seal in said seat, said electrical contact with the drill housing will be established by said plate coming into contact with the inside of said seat.
    The means for establishing said electrical contact may be designed as shown in Fig. 3, namely arranged at each of the plurality of sacrificial anode units 14, which are pre-77078 20120119; 2012-01-19 10 15 20 25 30 divided in said groove 13. The means for establishing said electrical contact may also be arranged to be contactable against the machine housing after a re-insertion of the anode device into an already inserted sealing device.
    Fig. 3a shows the device 5 in a section, showing the jacket surface 18, the side 21 facing the flushing chamber, the side 19 facing the flushing chamber and the sealing lip 20. The recess 13 shows a sacrificial anode unit 14 and an electrically conductive wire. 17. In practice, the recess 13 is designed for permanent holding of the anode device 11, i.e. in that the groove 13 constituting the groove is formed with a constriction at the end, with warts, ridges or the like, which prevent the anode device from falling out of the groove.
    Fig. 4 shows an alternative embodiment, wherein an anode device 11 'corresponding to the anode device 11 in Fig. 3 is arranged partially molded in a synthetic material constituting the flexible elastic sealing device itself. Contact can be established with the drill housing by having an external plate 16 'arranged at the outermost part of the casing surface 18'. It is also possible to provide wires inside the plastic material opening, for example, in the area of the sealing lip 20 'for contacting the neck adapter in operation.
    Fig. 5 shows a further device for flushing liquid seal 5 ", in which electrically conductive anode material, alternatively anode material lumps constituting sacrificial anode are placed in the goods of the elastic sealing device, which forms a matrix, such as a conductive macrostructure. This in turn has an integrated sacrificial anode unit, which in turn has contact with superficial material partly on the device's surface 18 "for contact with the machine housing, partly in an area which is in contact with the flushing liquid in the flushing chamber. 77078 20120119; 2012-01-19 10 The invention can be varied within the scope of the appended claims and the anode device can be varied in design and shape in many ways.
    The dimensions and mass of the anode device can be adapted to operating times but also to the character of flushing water, etc.
    All sacrificial anode units do not have to be in mutual contact with each other, but suitably at least some of the units have such mutual contact in order to achieve better operational reliability.
    A common material for the sacrificial anode units is anode zinc, while a cohesive wire, a helically wound tree, a strip, etc. can be made of iron or steel. The anode device can be baked in or molded in plastic material or, as stated above, can also be snapped into the groove intended for the purpose. The general condition, however, is that there is contact between the anode material and the flushing liquid. Materials for the sealing devices themselves may be of a conventional type for seals with intended use, of which only examples may be mentioned: polyurethane, NBR rubber, fluoroelastomers, EPDM rubber, silicone rubber, PTFE, POM.
    In an alternative embodiment, and when the drilling machine 1 has a drilling guide of synthetic material, said drilling guide and the first seal can be assembled, as indicated in Fig. 6, wherein a device for flushing fluid seal 5 "'is integrally integrated with a drilling bushing 10 so that said drill guide and the first seal form an integrated unit. Otherwise, the device 5 "'may be designed in accordance with what is described in connection with the above figures.
    In order to strengthen the protective function of a device according to the invention, an electrical circuit can be arranged in connection with the drilling machine, which imparts to the anode device with at least one sacrificial anode unit a suitable (positive) potential in relation to adjacent parts of the rock drilling machine. The anode device 77078 20120119: 2012-01-19 10 15 20 25 10 has in this case no means for direct electrical contact with the metal parts in the rock drilling machine but is electrically isolated from them. Such a circuit is indicated by reference numeral 26 in Fig. 1. Wires between the anode device and the electrical circuit are easily routed through e.g. special occupied channels in the drill housing and are therefore not shown in Fig.1.
    A method sequence according to the invention is now illustrated in the form of an example only with reference to Fig. 7, in which: Position 20 refers to the start of the sequence.
    Heading 21 relates to the provision of an annular elastic sealing device.
    Position 22 means that the annular elastic sealing device is supplemented by an anode device with at least one sacrificial anode unit intended for contact with flushing liquid.
    Position 23 means that the anode device is provided with means for establishing electrical contact with the drill housing.
    Position 24 means that the anode device is fixedly received by at least one recess in the sealing device.
    Position 25 refers to the end of the sequence.
    Within the scope of the invention are also arrangements for flushing liquid sealing, which are separate from the rock drilling machine itself, e.g. in the form of sealing arrangements at a bobbin case located next to the drill housing.
    The movable part in the drill housing housing, which cooperates with the device for flushing fluid seal, can be some other element than a neck adapter, e.g. any other part of the drill string. 77078 20120119; 2012-01-19
    权利要求:
    Claims (18)
    [1]
    Device for flushing liquid seal (5,6) in a rock drilling machine comprising an annular elastic sealing device comprising on the one hand means for abutment in a seat arranged in a flush housing, and on the other hand means for sealing abutment against a surface of a part (2) movable in the flush housing, characterized in that - the device for flushing liquid sealing (5,6) includes an anode device (11, 12) with at least one sacrificial anode unit intended for contact with flushing liquid.
    [2]
    Device according to claim 1, characterized in that the anode device has means (16, 16 ', 16 ", 16" "') for establishing electrical contact with the coil housing.
    [3]
    Device according to Claim 1 or 2, characterized in that the sealing device is designed with at least one recess (13) for fixed reception of the anode device (l1, l2).
    [4]
    Device according to Claim 1 or 2, characterized in that the sealing device (5, 6) is designed so that it at least partially encloses the anode device (11, 12).
    [5]
    Device according to one of the preceding claims, characterized in that it is integrated with a bearing device (10 "') for controlling a neck adapter (2).
    [6]
    Device according to one of the preceding claims, characterized in that the anode device (11, 12) comprises a plurality of electrically and / or mechanically connected sacrificial anode units. 77078 20120119; 2012-01-19 10 15 20 25 30 12
    [7]
    Device according to one of the preceding claims, characterized in that the anode device consists of or includes a flexibly arranged string.
    [8]
    Device according to any one of the preceding claims, characterized in that said sacrificial anode unit or units are dimensioned (-e) for expected consumption during the service life of the sealing device.
    [9]
    A method for manufacturing a device for flushing liquid sealing according to any one of claims 1 - 7, with an annular elastic sealing device comprising on the one hand means for abutment in a seat arranged in a flush housing and on the other hand means for sealing abutment against a surface of a part movable in the coil housing, the annular elastic sealing device being equipped with an anode device with at least one sacrificial anode unit intended for contact with flushing liquid.
    [10]
    A method according to claim 9, wherein the anode device is provided with means for establishing electrical contact with the coil housing.
    [11]
    A method according to claim 9 or 10, wherein the anode device is fixedly received by at least one recess in the sealing device.
    [12]
    A method according to claim 9 or 10, wherein the sealing device is caused to at least partially enclose the anode device.
    [13]
    A method according to any one of claims 9 - 12, wherein the sealing device is equipped with a plurality of electrically and / or mechanically connected sacrificial anode units. 77078 20120119; 2012-01-19 10 15 13
    [14]
    A method according to any one of claims 9 - 13, wherein the sealing device is equipped with an anode device constituted by or comprising a flexibly arranged string.
    [15]
    A method according to any one of claims 9 - 14, wherein the sealing device is equipped with an anode device which has a sacrificial anode quantity which is dimensioned for expected access during the life of the sealing device.
    [16]
    Spool housing for a rock drilling machine comprising at least one device according to one of Claims 1 to 8.
    [17]
    Rock drilling machine comprising at least one device according to any one of claims 1 - 8.
    [18]
    Rock drilling machine according to claim 17, wherein an electrical circuit is arranged, in order to impart a positive potential to the anode device in relation to adjacent parts of the flush housing. 77078 20120119; 2012-01-19
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    同族专利:
    公开号 | 公开日
    WO2013109182A1|2013-07-25|
    EP2805003A1|2014-11-26|
    SE536725C2|2014-06-24|
    CN104066918A|2014-09-24|
    JP2015505586A|2015-02-23|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4624329A|1984-02-15|1986-11-25|Varel Manufacturing Company|Rotating cutter drill set|
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    SE523949C2|2002-03-20|2004-06-08|Atlas Copco Secoroc Ab|Procedure for corrosion protection of particularly corrosion-exposed parts in rock drilling equipment|
    SE527698C2|2004-10-07|2006-05-16|Atlas Copco Rock Drills Ab|Rock drilling equipment|
    FR2929322B1|2008-03-25|2010-03-12|Montabert Roger|ROTO-PERCUTANT HYDRAULIC PUNCH HAMMER|EP3101217B1|2015-06-04|2018-04-04|Sandvik Intellectual Property AB|Shank adaptor with strengthened flushing hole|
    法律状态:
    2015-09-01| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE1250029A|SE536725C2|2012-01-19|2012-01-19|Device for flushing fluid sealing at a rock drill, method of manufacture, flush housing and rock drill|SE1250029A| SE536725C2|2012-01-19|2012-01-19|Device for flushing fluid sealing at a rock drill, method of manufacture, flush housing and rock drill|
    PCT/SE2013/050008| WO2013109182A1|2012-01-19|2013-01-09|Flushing liquid sealing device in a rock drilling machine, method of producing it, flushing housing and rock drilling machine|
    CN201380006000.6A| CN104066918A|2012-01-19|2013-01-09|Flushing liquid sealing device in a rock drilling machine, method of producing it, flushing housing and rock drilling machine|
    EP13738985.4A| EP2805003A1|2012-01-19|2013-01-09|Flushing liquid sealing device in a rock drilling machine, method of producing it, flushing housing and rock drilling machine|
    JP2014553276A| JP2015505586A|2012-01-19|2013-01-09|Rocking machine flushing liquid sealing device, method of manufacturing the same, flushing housing, and rock drill|
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