An underwater electric winch sealing device

Abstract

The application relates to an underwater electric winch sealing device and belongs to the technical field of underwater winding and unwinding equipment. The underwater electric winch sealing device comprises a dynamic sealing device, the dynamic sealing device comprises an outer ring and an inner ring, the inner ring is arranged on the inner side of the outer ring, and a sliding frame and two end covers are slidably connected between the outer ring and the inner ring. The underwater electric winch sealing device can automatically adjust the pressure of hydraulic oil between the outer ring and the inner ring, so that the dynamic sealing device can normally operate at the corresponding water depth, and the water pressure can act on the hydraulic oil during the diving process of the underwater electric winch. When the water pressure is greater than the pressure of the hydraulic oil, the water pressure can indirectly extrude the hydraulic oil, and at this time, the hydraulic pressure of the hydraulic oil can be consistent with the external water pressure, thereby effectively reducing the probability of mixing of the hydraulic oil and water due to the excessively large pressure difference between the hydraulic pressure of the hydraulic oil and the nearby water pressure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of underwater winch, in particular to a sealing device for underwater electric winch. BACKGROUND

[0002] The underwater winch is an unattended power device applied to underwater observation platform, which is generally composed of a mounting frame, a driving device, a transmission mechanism, a guide cable device, a cable, a tethered communication cable and an underwater electric slip ring, etc., and is driven by an internal motor to realize the winding and unwinding of the rope or cable.

[0003] A Chinese patent discloses an underwater winch with built-in motor and oil-filled mechanical seal (authorized publication number CN213568855U), a compensation oil pipe is installed at the fixed end of the motor sealing cabin, the motor sealing cabin is filled with transformer oil, the compensation oil pipe keeps the pressure balance inside and outside the cabin, the sealing output shaft is provided with a mechanical seal, and when the seal is worn, the compensation is automatically carried out under the double action of the compensation oil pipe and the mechanical seal, so as to ensure the sealing reliability.

[0004] Since the above-mentioned device can only compensate the pressure inside the mechanical seal when the mechanical seal is worn, however, the water pressure at different depths in water will also change the pressure inside and outside the mechanical seal, and the above-mentioned device cannot automatically adjust the pressure of the mechanical seal under the above-mentioned condition, which will increase the operation burden of the mechanical seal and shorten the service life of the mechanical seal itself. SUMMARY

[0005] Therefore, it is necessary to provide a sealing device for underwater electric winch in view of the problem that the sealing device for underwater electric winch is easily affected by water pressure and rotational centrifugal force, and it is difficult to ensure its effective operation.

[0006] A sealing device for underwater electric winch, comprising a dynamic sealing device, the dynamic sealing device comprises an outer ring and an inner ring, the inner ring is arranged on the inner side of the outer ring, and a sliding frame and two end covers are slidably connected between the outer ring and the inner ring, the two end covers are symmetrically arranged on the two sides of the two sliding frames, the sliding frame is rotatably connected with a rotating shaft which is annularly arranged and in contact with the outer ring and the inner ring, O-shaped sealing rings are arranged between the outer ring, the inner ring and the end covers, and a self-adaptive pressure adjusting device is fixedly connected and communicated with the bottom of the outer ring.

[0007] Further, the self-adaptive pressure adjusting device comprises a liquid guide pipe, a piston cylinder, a piston block and an adjusting bolt, the liquid guide pipe is fixedly connected and communicated with the bottom of the outer ring, the piston cylinder is fixedly connected and communicated with the bottom of the liquid guide pipe, the piston block is slidably connected in the inner part of the piston cylinder, the inner part of the liquid guide pipe and the inner part of the piston cylinder are filled with hydraulic oil, the adjusting bolt is threadedly connected with the bottom of the piston cylinder, the top of the adjusting bolt penetrates into the inner part of the piston cylinder and is in contact with the piston block, and a water guide hole is formed in the bottom of the piston cylinder.

[0008] In one of the embodiments, the adaptive pressure regulating device can not only actively adjust the pressure of the hydraulic oil between the outer ring and the inner ring to meet the normal operation of the dynamic sealing device at the corresponding water depth, but also can be pressed indirectly by water pressure when the water pressure is greater than the pressure of the hydraulic oil during the underwater diving of the electric winch. At this time, the hydraulic pressure of the hydraulic oil can be consistent with the external water pressure, effectively reducing the probability of mixing of the hydraulic oil and water due to the large pressure difference between the hydraulic pressure of the hydraulic oil and the nearby water pressure, and further ensuring the stable operation of the dynamic sealing device.

[0009] Further, the top of the adjusting bolt is provided with a sliding cavity, and an adjusting column is slidably connected in the sliding cavity.

[0010] In one of the embodiments, the trajectory and range of the piston block can be limited to ensure the normal operation of the piston block.

[0011] Further, the vertical cross-sectional shape of the sliding cavity and the adjusting column is convex, and the local cross-sectional dimension of the adjusting column arranged in the inside of the sliding cavity is greater than the local cross-sectional dimension of the adjusting column arranged in the outside of the sliding cavity.

[0012] In one of the embodiments, the adjusting column can be prevented from being out of the sliding cavity to ensure that the adjusting bolt can stably drive the adjusting column.

[0013] Further, the inner top wall of the piston cylinder is fixedly connected with an elastic liquid bag, the bottom of the liquid guide pipe is fixedly connected and communicated with the bottom of the elastic liquid bag, and the top of the piston block is in contact with the elastic liquid bag.

[0014] In one of the embodiments, the elastic liquid bag can reduce the probability of leakage of the hydraulic oil from the gap between the piston block and the piston cylinder, not only ensuring the hydraulic pressure of the hydraulic oil, but also reducing the probability of pollution of the water body by the hydraulic oil.

[0015] Further, the top of the elastic liquid bag is fixedly connected and communicated with an oil pressure quick connector fixedly connected with the piston cylinder, and the top of the oil pressure quick connector penetrates to the outside of the piston cylinder.

[0016] In one of the embodiments, the staff can quickly extract or inject hydraulic oil, so that the staff can maintain the work more conveniently.

[0017] Further, the elastic liquid bag is internally fixedly connected with a protection mechanism, the protection mechanism comprises a mounting block and a filter sheet, the mounting block is fixedly connected to the inner top wall of the elastic liquid bag, the top of the mounting block is provided with a first liquid guide cavity and a second liquid guide cavity which are in communication with each other, the bottom part of the liquid guide pipe and the oil pressure quick connector are communicated with the first liquid guide cavity and the second liquid guide cavity respectively, the bottom of the mounting block is provided with a liquid guide opening communicated with the second liquid guide cavity, and the filter sheet is rotationally connected to the inside of the second liquid guide cavity, and one end of the filter sheet is in contact with the lower opening of the first liquid guide cavity.

[0018] In one of the embodiments, the protection mechanism can collect the solid debris which sinks along with the hydraulic oil together, so as to reduce the resistance during the rotation of the inner ring and the rotating shaft, effectively reduce the wear rate, and in the process that the staff pours the hydraulic oil inwardly, the filter sheet can be abutted and covered on the lower opening of the first liquid guide cavity by the hydraulic oil flowing inwardly, which not only can block the solid debris remaining in the second liquid guide cavity from flowing back, but also can avoid the solid debris in the hydraulic oil flowing inwardly from entering between the outer ring and the inner ring, which further reduces the resistance during the rotation of the inner ring and the rotating shaft, and prolongs the service life of the dynamic sealing device as a whole.

[0019] Further, the first filter screen is embedded and mounted in the inside of the liquid guide opening.

[0020] In one of the embodiments, this can prevent the solid debris from entering the inside of the elastic liquid bag, which not only can reduce the difficulty of discharging the solid debris, but also can reduce the probability of the solid debris scratching the elastic liquid bag, so as to ensure the integrity of the elastic liquid bag.

[0021] Further, the cross section shape of the bottom of the mounting block is in an arc shape, and the corners of the mounting block are chamfered.

[0022] In one of the embodiments, this can reduce the probability of the elastic liquid bag being scratched by the mounting block, and further ensure the integrity of the elastic liquid bag.

[0023] Further, the second filter screen is embedded and mounted in the inside of the water guide hole, and the bottom of the second filter screen is flush with the lower opening of the water guide hole.

[0024] In one of the embodiments, the second filter screen can filter out the solid impurities mixed in the water, so as to avoid the solid impurities from entering the inside of the piston cylinder, and ensure the normal operation of the piston block and the adjusting bolt.

[0025] The adaptive pressure regulating device can not only actively regulate the pressure of the hydraulic oil between the outer ring and the inner ring to meet the normal operation of the dynamic sealing device at the corresponding water depth, but also can be indirectly extruded by water pressure when the water pressure is greater than the pressure of the hydraulic oil during the diving process of the underwater electric winch. At this time, the hydraulic pressure of the hydraulic oil can be consistent with the external water pressure, effectively reducing the probability of mixing of the hydraulic oil and water due to the excessive pressure difference between the hydraulic pressure of the hydraulic oil and the nearby water pressure, thereby ensuring the stable operation of the dynamic sealing device.

[0026] The protection mechanism can collect solid debris sinking along with the hydraulic oil together to reduce the resistance during rotation of the inner ring and the shaft, effectively reducing the wear rate and further ensuring the stable operation of the dynamic sealing device. During the process of the staff pouring hydraulic oil inward, the inward flowing hydraulic oil can abut and cover the lower opening of the first liquid guide cavity, which not only can block the reflow of residual solid debris remaining in the second liquid guide cavity, but also can avoid the solid debris in the inward flowing hydraulic oil entering between the outer ring and the inner ring, further reducing the resistance during rotation of the inner ring and the shaft, thereby prolonging the service life of the dynamic sealing device as a whole. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the present application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0028] Figure 1 It is a connection diagram of the dynamic sealing device and the adaptive pressure regulating device in the present application;

[0029] Figure 2 It is a layout diagram of the dynamic sealing device and the adaptive pressure regulating device in the present application;

[0030] Figure 3 It is a cross-sectional view of the layout of the dynamic sealing device and the adaptive pressure regulating device in the present application;

[0031] Figure 4 It is an explosion diagram of the dynamic sealing device in the present application;

[0032] Figure 5 It is a cross-sectional view of the dynamic sealing device in the present application; Figure 1

[0033] It is a cross-sectional view of the dynamic sealing device in the present application; Figure 6 Figure 1 It is a cross-sectional view of the dynamic sealing device in the present application;​

[0034] Figure 7 Figure 7 is a close-up view of the protection mechanism in the present application. Figure 6 Figure 8 is a close-up view of the protection mechanism in the present application.

[0035] Figure 8 Figure 9 is an exploded view of the protection mechanism in the present application.

[0036] Reference signs:

[0037] 100, dynamic sealing device; 110, outer ring; 120, inner ring; 130, sliding frame; 140, end cover; 150, rotating shaft; 160, O-shaped sealing ring; 200, self-adaptive pressure regulating device; 210, liquid guide pipe; 220, piston cylinder; 221, water guide hole; 230, piston block; 240, adjusting bolt; 241, sliding cavity; 250, adjusting column; 260, elastic liquid bag; 270, oil pressure quick connector; 280, protection mechanism; 281, mounting block; 2811, first liquid guide cavity; 2812, second liquid guide cavity; 2813, liquid guide opening; 282, filter sheet; 283, first filter screen; 290, second filter screen. DETAILED DESCRIPTION

[0038] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the drawings of the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0039] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or there can be a middle component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there can be a middle component. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used in the description of the present application are for the purpose of illustration only and do not indicate the only implementation.

[0040] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0041] In the present application, unless otherwise explicitly specified and limited, the first feature is "on", "under" the second feature, which can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the first feature is "above", "over" and "on" the second feature, which can be that the first feature is directly above or obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height. The first feature is "below", "under" and "under" the second feature, which can be that the first feature is directly below or obliquely below the second feature, or only means that the first feature is lower than the second feature in horizontal height.

[0042] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more related listed items.

[0043] The following will be described in conjunction with Figure 1 - Figure 8 The underwater electric winch sealing device of the present application is described.

[0044] In one embodiment, an underwater electric winch sealing device comprises a dynamic sealing device 100, the dynamic sealing device 100 comprising an outer ring 110 and an inner ring 120, the inner ring 120 being arranged on the inner side of the outer ring 110, a sliding frame 130 and two end covers 140 being slidingly connected between the outer ring 110 and the inner ring 120, the two end covers 140 being symmetrically distributed on both sides of the two sliding frames 130, the sliding frame 130 being rotatably connected with a rotating shaft 150 arranged in a ring shape and in contact with the outer ring 110 and the inner ring 120, O-shaped sealing rings 160 being arranged between the outer ring 110, the inner ring 120 and the end cover 140, and the bottom of the outer ring 110 being fixedly connected and communicated with an adaptive pressure regulating device 200;

[0045] The underwater electric winch comprises a frame and two dynamic sealing devices 100, the outer rings 110 of the two dynamic sealing devices 100 being fixedly connected to the two ends of the frame, respectively, and a drum being fixedly connected between the two inner rings 120, the surface of the drum being wound with a cable, a reduction motor being fixedly connected inside the drum, the end of the output shaft of the reduction motor penetrating out of the drum frame and being fixedly connected, and the signal transmission part of the reduction motor being electrically connected with the energy supply and control equipment outside through a water-tight sealing connector;

[0046] It should be noted that the power supply device mentioned above can be a power supply, which is a device that converts other forms of energy into electrical energy and provides electrical energy to a circuit. The control device can be a PLC controller, which is a digital arithmetic controller with a microprocessor for automation control. Control instructions can be loaded into memory for storage and execution at any time. In the above description, the oil pressure quick connector 270, the water-tight connector, the speed reducer, the power supply and the PLC controller are all mature devices in the prior art, and the specific model can be selected according to actual needs. Here is not described in detail.

[0047] When the staff needs to release the cable, the staff only needs to manually control the speed reducer to drive in the corresponding direction through the PLC controller. The speed reducer drives the drum to rotate in the corresponding direction. The drum normally winds or releases the cable at this time.

[0048] As shown in Figure 5 , Figure 6 and Figure 7 , the adaptive pressure regulating device 200 includes a liquid guide pipe 210, a piston cylinder 220, a piston block 230, and an adjusting bolt 240. The liquid guide pipe 210 is fixedly connected and communicated to the bottom of the outer ring 110. The piston cylinder 220 is fixedly connected and communicated to the bottom of the liquid guide pipe 210. The piston block 230 is slidingly connected to the inside of the piston cylinder 220. The inside of the liquid guide pipe 210 and the piston cylinder 220 between the outer ring 110 and the inner ring 120 are filled with hydraulic oil. The adjusting bolt 240 is threadedly connected to the bottom of the piston cylinder 220. The top of the adjusting bolt 240 penetrates into the inside of the piston cylinder 220 and is in contact with the piston block 230. The bottom of the piston cylinder 220 is provided with a water guide hole 221. The top of the adjusting bolt 240 is provided with a sliding cavity 241. The inside of the sliding cavity 241 is slidingly connected with an adjusting column 250. The top of the adjusting column 250 penetrates through the sliding cavity 241 and is fixedly connected with the piston block 230. The vertical sectional shape of the sliding cavity 241 and the adjusting column 250 is convex. The local sectional dimension of the adjusting column 250 arranged inside the sliding cavity 241 is greater than the local sectional dimension of the adjusting column 250 arranged outside the sliding cavity 241. The inner top wall of the piston cylinder 220 is fixedly connected with an elastic liquid bag 260. The bottom of the liquid guide pipe 210 is fixedly connected and communicated with the bottom of the elastic liquid bag 260. The top of the piston block 230 is in contact with the elastic liquid bag 260. The top of the elastic liquid bag 260 is fixedly connected and communicated with an oil pressure quick connector 270 fixedly connected with the piston cylinder 220. The top of the oil pressure quick connector 270 penetrates to the outside of the piston cylinder 220. A second filter screen 290 is embedded and installed in the inside of the water guide hole 221. The bottom of the second filter screen 290 is flush with the lower opening of the water guide hole 221.

[0049] The worker can adjust the screw bolt 240 according to the water depth requirement, and the screw bolt 240 is screwed up and down, at this time, the rod of the screw bolt 240 pushes up or away from the piston block 230, and the piston block 230 is lifted along the piston cylinder 220, in this process, the piston block 230 also gradually increases or reduces the extrusion force of the elastic liquid bag 260, and the hydraulic pressure of the hydraulic oil is increased or reduced, so as to ensure that when the dynamic sealing device 100 is running in the area corresponding to the water depth, the hydraulic pressure of the hydraulic oil between the outer ring 110 and the inner ring 120 and the nearby water pressure is kept in a relatively balanced range, so as to reduce the probability of mixing of the hydraulic oil and water due to the large pressure difference between the hydraulic pressure of the hydraulic oil and the nearby water pressure, and to ensure that the dynamic sealing device 100 can run stably;

[0050] When the piston cylinder 220 enters the water, the water enters the inside of the piston cylinder 220 through the water guide hole 221 and fills below the piston block 230, in the process of the piston cylinder 220 diving, the water pressure in the piston cylinder 220 is the same as the surrounding water pressure, and the water pressure in the piston cylinder 220 acts on the hydraulic oil through the piston block 230 and the elastic liquid bag 260, when the water pressure is greater than the hydraulic pressure of the hydraulic oil, the water pressure can extrude the hydraulic oil through the piston block 230 and the elastic liquid bag 260 at this time, which will increase the pressure between the outer ring 110 and the inner ring 120, so that the outer ring 110 and the inner ring 120 and the surrounding water pressure are always in a balanced state, which does not need to be adjusted by the worker, further ensuring that the dynamic sealing device 100 can run stably.

[0051] As shown in Figure 7 and Figure 8 , the inside of the elastic liquid bag 260 is fixedly connected with a protection mechanism 280, the protection mechanism 280 includes a mounting block 281 and a filter piece 282, the mounting block 281 is fixedly connected to the inner top wall of the elastic liquid bag 260, the top of the mounting block 281 is provided with a first liquid guide cavity 2811 and a second liquid guide cavity 2812 which are in communication, the liquid guide pipe 210 and the bottom of the oil pressure quick connector 270 are communicated with the first liquid guide cavity 2811 and the second liquid guide cavity 2812 respectively, the bottom of the mounting block 281 is provided with a liquid guide hole 2813 communicated with the second liquid guide cavity 2812, the filter piece 282 is rotatably connected to the inside of the second liquid guide cavity 2812, one end of the filter piece 282 is in contact with the lower opening of the first liquid guide cavity 2811, and the first filter screen 283 is embedded in the inside of the liquid guide hole 2813; the cross section shape of the bottom of the mounting block 281 is arc-shaped, and the corners of the mounting block 281 are chamfered.

[0052] In the process of the worker drawing hydraulic oil through the oil pressure quick joint 270, the outward flowing hydraulic oil can drive the filter disc 282 to rotate at this time, so that the filter disc 282 no longer blocks the first liquid guide cavity 2811, so that the hydraulic oil can carry the solid debris generated in the operation process through the oil pressure quick joint 270;

[0053] When the worker stops drawing hydraulic oil outward, the filter disc 282 rotates under the action of gravity and contacts the lower opening of the first liquid guide cavity 2811 at this time, and when the worker fills hydraulic oil through the oil pressure quick joint 270, the filter disc 282 is tightly abutted and covers the lower opening of the first liquid guide cavity 2811 by the inward flowing hydraulic oil at this time, which not only can block the solid debris remaining in the second liquid guide cavity 2812 from flowing back, but also can avoid the solid debris in the inward flowing hydraulic oil from entering between the outer ring 110 and the inner ring 120, which can reduce the resistance during the rotation of the inner ring 120 and the shaft 150, effectively reducing the wear rate, thereby prolonging the service life of the dynamic sealing device 100 as a whole.

[0054] The technical features of the above embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present disclosure.

[0055] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of variations and improvements can be made, which are all within the scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An underwater electric winch sealing device, comprising a dynamic sealing device (100), the dynamic sealing device (100) comprising an outer ring (110) and an inner ring (120), the inner ring (120) being arranged inside the outer ring (110), a sliding frame (130) and two end covers (140) being slidingly connected between the outer ring (110) and the inner ring (120), the two end covers (140) being symmetrically distributed on both sides of the two sliding frames (130), the sliding frame (130) being rotatably connected with a rotating shaft (150) arranged in a ring shape and in contact with the outer ring (110) and the inner ring (120), and O-shaped sealing rings (160) being arranged between the outer ring (110), the inner ring (120) and the end cover (140), characterized in that, The bottom of the outer ring (110) is fixedly connected and communicated with an adaptive pressure regulating device (200); The adaptive pressure regulating device (200) comprises a liquid guide pipe (210), a piston cylinder (220), a piston block (230) and an adjusting bolt (240), the liquid guide pipe (210) is fixedly connected and communicated with the bottom of the outer ring (110), the piston cylinder (220) is fixedly connected and communicated with the bottom of the liquid guide pipe (210), the piston block (230) is slidingly connected in the piston cylinder (220), the inner part of the liquid guide pipe (210) and the piston cylinder (220) between the outer ring (110) and the inner ring (120) is filled with hydraulic oil, the adjusting bolt (240) is threadedly connected with the bottom of the piston cylinder (220), the top of the adjusting bolt (240) penetrates into the piston cylinder (220) and is in contact with the piston block (230), and the bottom of the piston cylinder (220) is provided with a water guide hole (221).

2. The underwater electric winch sealing arrangement of claim 1, wherein, The top of the adjusting bolt (240) is provided with a sliding cavity (241), the sliding cavity (241) is slidingly connected with an adjusting column (250) in the inside, and the top of the adjusting column (250) penetrates through the sliding cavity (241) and is fixedly connected with the piston block (230).

3. An underwater electric winch sealing arrangement according to claim 2, characterised in that, The vertical section shape of the sliding cavity (241) and the adjusting column (250) is convex, and the local section size of the adjusting column (250) arranged in the inside of the sliding cavity (241) is greater than the local section size of the adjusting column (250) arranged outside the sliding cavity (241).

4. The underwater electric winch sealing arrangement of claim 1, wherein, The inner top wall of the piston cylinder (220) is fixedly connected with an elastic liquid bag (260), the bottom of the liquid guide pipe (210) is fixedly connected and communicated with the bottom of the elastic liquid bag (260), and the top of the piston block (230) is in contact with the elastic liquid bag (260).

5. An underwater electric winch sealing arrangement according to claim 4, characterised in that, The top of the elastic liquid bag (260) is fixedly connected and communicated with an oil pressure quick connector (270) fixedly connected with the piston cylinder (220), and the top of the oil pressure quick connector (270) penetrates to the outside of the piston cylinder (220).

6. An underwater electric winch sealing arrangement according to claim 5, characterised in that, The inside of the elastic liquid bag (260) is fixedly connected with a protection mechanism (280), the protection mechanism (280) comprises a mounting block (281) and a filter sheet (282), the mounting block (281) is fixedly connected to the inner top wall of the elastic liquid bag (260), the top of the mounting block (281) is provided with a first liquid guide cavity (2811) and a second liquid guide cavity (2812) in communication with each other, the bottom of the liquid guide pipe (210) and the oil pressure quick connector (270) are communicated with the first liquid guide cavity (2811) and the second liquid guide cavity (2812) respectively, the bottom of the mounting block (281) is provided with a liquid guide opening (2813) communicated with the second liquid guide cavity (2812), the filter sheet (282) is rotatably connected to the inside of the second liquid guide cavity (2812), and one end of the filter sheet (282) is in contact with the lower opening of the first liquid guide cavity (2811).

7. An underwater electric winch sealing arrangement according to claim 6, characterised in that, The first filter screen (283) is embedded and mounted in the inside of the liquid guide opening (2813).

8. The underwater electric winch sealing arrangement of claim 6, wherein, The cross section shape of the bottom of the mounting block (281) is circular arc shape, and the corners of the mounting block (281) are chamfered.

9. The underwater electric winch sealing arrangement of claim 1, wherein, The inside of the water guide hole (221) is embedded with a second filter screen (290), and the bottom of the second filter screen (290) is flush with the lower opening of the water guide hole (221).

Images