An emergency sealing device for ball valves in deep-sea applications

Abstract

This invention relates to the field of deep-sea valve control technology and provides an emergency sealing device for ball valves in deep-sea conditions. The device includes a cable, a mobile positioning mechanism, an automatic grease injection mechanism, and a sealing chamber. The cable connects to a surface power supply system to power the various electric components of the mobile positioning mechanism and the automatic grease injection mechanism. The mobile positioning mechanism includes a frame, a connecting rod, an electromagnetic adsorption rod, a thruster, an air pipe, an air bladder, and a positioner. The positioner receives signals from a positioning transmitter and drives the thruster and air bladder to descend closer to the ball valve body. The automatic grease injection mechanism includes a cavity, a sealing chamber, a pressure balance pipe, a grease injection sleeve, an annular heating element, a cylindrical heating block, an elastic bladder, an output pipe, a hydraulic telescopic rod, and a sealing control box. An elastic bladder is installed inside the cavity, and sealing grease is injected into the elastic bladder. The output pipe injects the sealing grease into the sealing hole of the ball valve body through the grease injection sleeve. This invention can automatically perform emergency sealing of ball valves in deep-sea environments.

Description

Technical Field

[0001] This invention relates to the field of deep-sea valve control technology and provides an underwater robot device capable of emergency sealing of ball valves when deep-sea valves fail. Background Technology

[0002] Ball valves, suitable for deep-sea applications, play a crucial role in oil and gas pipelines. They control fluid flow by rotating the ball. Adjusting the ball's position increases or decreases the fluid passageway within the pipeline, thus achieving precise control over oil and gas flow. This is essential for maintaining normal oil and gas transport, distribution, and process control within the pipeline.

[0003] Ball valves suitable for deep-sea applications typically possess excellent sealing performance, effectively preventing leakage. This is crucial for preventing environmental pollution, ensuring personnel safety, and protecting equipment and facilities. For example, the deep-sea ball valve described in our Chinese invention patent CN115949767A exhibits superior sealing performance, ensuring the valve operates normally under low temperature and high pressure conditions without deformation or leakage.

[0004] However, due to the high pressure, low temperature, high salinity, and high corrosiveness of the deep-sea working environment, ball valves designed for deep-sea operations still face the problem of sealing failure, which is catastrophic for subsea oil and gas pipelines. This can lead to oil and gas leaks and pollution of the marine environment. The deep-sea ecosystem is extremely fragile, and once a leak occurs, it can have a serious impact on marine life and the food chain, while the leaked oil and gas also results in economic losses. Furthermore, if a failed ball valve is sealed by manual submersion, the high pressure and low temperature of the deep sea pose significant safety risks to the personnel involved in the oil and gas leak. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, the technical problem this invention aims to solve is that ball valves used in deep-sea operations require emergency sealing after leakage. This invention provides an emergency sealing device for ball valves in deep-sea operations. This device automatically submerges, positions itself behind the ball valve, and injects sealing grease into the plugging hole to perform an emergency seal, effectively controlling leakage.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an emergency sealing device for ball valves in deep-sea operations, comprising a cable, a moving positioning mechanism, an automatic grease injection mechanism, and a sealing chamber. The cable is connected to a power supply system on the water to supply power to the electric components of the moving positioning mechanism and the automatic grease injection mechanism.

[0007] The mobile positioning mechanism includes a frame, a connecting rod, an electromagnetic adsorption rod, a thruster, an air pipe, an airbag, and a positioner. Multiple thrusters are mounted on the frame, and multiple airbags are located on the top of the frame. The air pipe connects to a water-based air pump to provide air for the airbags to control balance and elevation. The electromagnetic adsorption rod can adsorb the ball valve body after being energized, and the connecting rod can be inserted into the lug of the ball valve body. The ball valve body has two positioning launch points. The positioner receives signals from the positioning launch points and drives the thrusters and airbags to descend and approach the ball valve body.

[0008] The automatic grease injection mechanism includes a cavity, a sealed chamber, a pressure balance pipe, a grease injection sleeve, an annular heating element, a cylindrical heating block, an elastic bladder, an output pipe, a hydraulic telescopic rod, and a sealing control box. An elastic bladder is installed inside the cavity, and grease is injected into it. The elastic bladder is connected to the output pipe, which injects the grease into the sealing hole of the ball valve body through the grease injection sleeve. The grease solidifies at a low temperature. Multiple annular heating elements are evenly installed in a ring shape on the outside of the cavity to heat the grease. The cylindrical heating block is located on the cavity, and the output pipe surrounds the outside of the cylindrical heating block. The cavity is sealed, and a water injection switch and a pressure balance pipe are installed on one side of the cavity. The pressure balance pipe is connected to seawater. When the water injection switch is opened, seawater enters the cavity through the pressure balance pipe, compressing the elastic bladder. The output pipe is also connected to a booster pump. The sealed chamber is used to seal the circuit and hydraulic components. A hydraulic telescopic rod and a rotating motor are installed inside the sealed chamber. The sealing control box controls the operation of the annular heating element, the cylindrical heating block, the motor, the hydraulic components, and the water injection switch.

[0009] A hydraulic lifting rod is installed at the top of the grease injection sleeve. After the moving positioning mechanism is positioned with the ball valve body, the hydraulic lifting rod drives the grease injection sleeve to descend, and the grease injection sleeve is pressed tightly against the sealing hole. A bolt is installed in the sealing hole. The hydraulic telescopic rod inside the grease injection sleeve extends under the action of the hydraulic components in the sealed chamber. A magnetic sleeve is installed at the front of the hydraulic telescopic rod, and the magnetic sleeve is sleeved with the bolt. The hydraulic telescopic rod rotates forward and backward under the action of the rotating motor. A through sealing grease channel is provided inside the grease injection sleeve, which is connected to the output pipe and the sealing hole respectively.

[0010] According to another embodiment of the present invention or any of the foregoing embodiments, the emergency sealing device wherein the propeller is an electric motor-driven propeller, and three or more such propellers are provided.

[0011] According to another embodiment of the present invention or any of the foregoing embodiments, the emergency sealing device has four air bladders, and the air tubes are connected to four independent branch tubes, which can adjust the air volume in different air bladders to maintain the dynamic balance of the frame. The air tubes are bidirectionally controlled to perform air supply and inhalation.

[0012] According to another embodiment of the present invention or any of the foregoing embodiments, the emergency sealing device has multiple annular heating elements, which have a double-layer structure including a heating layer and a heat insulation layer, and are disposed on the inner or outer side of the housing.

[0013] According to another embodiment of the present invention or any of the foregoing embodiments, in an emergency sealing device, a filter screen is installed at the end of the pressure balancing tube that contacts the seawater.

[0014] According to another embodiment of the present invention or any of the foregoing embodiments, the emergency sealing device includes an end plate, a cover, a fixing rod, and an O-ring. There are two end plates, which are supported by the fixing rod. The cover is located between the two end plates. The O-ring is installed between the end plates and the cover for sealing. An elastic bladder is installed inside the cover.

[0015] According to another embodiment of the present invention or any of the foregoing embodiments, the emergency sealing device is provided with a three-way connector, which is further connected to an output pipe and an injection pipe, the injection pipe being used to inject sealing grease.

[0016] According to another embodiment of the present invention or any of the foregoing embodiments, in the emergency sealing device, a support filter is installed at the connection between the elastic bladder and the output pipe. The support filter is cylindrical to prevent the elastic bladder from contracting and blocking the output pipe.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] The ball valve emergency sealing device for deep-sea operation provided by this invention can automatically seal the ball valve in a deep-sea environment, avoiding large-scale leakage in the deep-sea environment and enabling effective control of leakage. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the ball valve emergency sealing device for deep-sea operations described in this invention in conjunction with the ball valve body.

[0020] Figure 2 This is a three-dimensional schematic diagram of the grease injection mechanism described in this invention;

[0021] Figure 3 This is a cross-sectional schematic diagram of the hydraulic telescopic rod, grease injection sleeve, and magnetic sleeve described in this invention;

[0022] Figure 4 This is a three-dimensional schematic diagram of the grease injection mechanism and the ball valve body described in this invention.

[0023] Figure 5 This is a side view of the grease injection mechanism described in this invention;

[0024] Figure 6 This is an exploded view of the assembly of the grease injection mechanism described in this invention.

[0025] In the diagram: 1. Ball valve body; 2. Connecting rod; 3. Frame; 4. Thruster; 5. Airbag; 6. Air pipe; 7. Cable; 8. Electromagnetic adsorption rod; 9. Pressure balance pipe; 10. Magnetic sleeve; 11. Sealing chamber; 12. Hydraulic telescopic rod; 13. Grease injection sleeve; 14. Hydraulic lifting rod; 15. Injection pipe; 16. Filter screen; 17. Cavity; 18. Annular heating element; 19. Columnar heating block; 20. Output pipe; 21. Booster pump; 22. Sealing control box; 23. T-connector; 24. Cover; 25. Elastic bladder; 26. Support filter screen; 27. O-ring seal; 28. Water injection switch; 29. ​​Sealing grease channel; 30. Sealing gasket; 31. Sealing hole. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] like Figure 1 As shown, an emergency sealing device for deep-sea ball valves is installed on the ball valve body. The emergency sealing device for deep-sea ball valves includes a cable 7, a moving positioning mechanism, an automatic grease injection mechanism, and a sealing chamber 11. The cable 7 is connected to the power supply system on the water to supply power to the electric components of the moving positioning mechanism and the automatic grease injection mechanism.

[0028] like Figure 1 As shown, the mobile positioning mechanism includes a frame 3, a connecting rod 2, an electromagnetic adsorption rod 8, a thruster 4, an air pipe 6, airbags 5, and a positioner. Multiple thrusters 4, each a motor-driven propeller, are mounted on the frame 3, with three or more thrusters in total. Multiple airbags 5 are located at the top of the frame 3. The air pipe 6 connects to a water-based air pump, providing air for the airbags 5 to control their balance and elevation. The electromagnetic adsorption rod 8 can adsorb the ball valve body 1 after being energized, and the connecting rod 2 can be inserted into the lugs of the ball valve body 1. The ball valve body 1 has two positioning launch points. The positioner receives signals from these launch points and drives the thrusters 4 and airbags 5 to descend closer to the ball valve body 1. There are four airbags 5, and the air pipe 6 connects to four independent branch pipes, allowing adjustment of the air volume within each airbag 5 to maintain the dynamic balance of the frame 3. The air pipe 6 provides bidirectional control, performing both air supply and intake.

[0029] like Figure 2As shown, the automatic grease injection mechanism includes a cavity 17, a sealing chamber 11, a pressure balance pipe 9, a grease injection sleeve 13, an annular heating element 18, a cylindrical heating block 19, an elastic bladder 25, an output pipe 20, a hydraulic telescopic rod 12, and a sealing control box 22. The elastic bladder 25 is installed inside the cavity 17, and grease is injected into the elastic bladder 25. The elastic bladder 25 is connected to the output pipe 20, and the output pipe 20 injects the grease into the sealing hole 31 of the ball valve body 1 through the grease injection sleeve 13. The grease solidifies at a low temperature. There are multiple annular heating elements 18, which are evenly installed in a ring on the outside of the cavity 17 to heat the grease. There are multiple annular heating elements 18, which have a double-layer structure, including a heating layer and an insulation layer, and are set inside or outside the cover 24.

[0030] like Figure 2 , 6 As shown, a cylindrical heating block 19 is mounted on the cavity 17, and an output pipe 20 surrounds the outside of the cylindrical heating block 19. The cavity 17 is sealed, and a water injection switch 28 and a pressure balance pipe 9 are installed on one side of the cavity 17. The pressure balance pipe 9 is connected to seawater, and a filter screen 16 is installed at the end of the pressure balance pipe 9 that contacts the seawater to prevent seaweed, plankton, solid particles, and other substances in the seawater from clogging the pressure balance pipe 9 or entering the cavity 17 and affecting operation. The cavity 17 includes end plates, a cover 24, a fixing rod, and an O-ring seal 27. There are two end plates, supported by the fixing rod. The cover 24 is located between the two end plates, and the O-ring seal 27 is installed between the end plates and the cover 24 for sealing. An elastic bladder 25 is installed inside the cover 24. The elastic bladder 25 is connected to a three-way connector 23, which is also connected to the output pipe 20 and the injection pipe 15. The injection pipe 15 is used to inject sealing grease. A support filter 26 is installed at the connection between the elastic bladder 25 and the output pipe 20. The support filter 26 is cylindrical to prevent the elastic bladder 25 from contracting and blocking the output pipe 20.

[0031] like Figure 2 , 5 As shown, after the water injection switch 28 is opened, seawater enters the cavity 17 through the pressure balance pipe 9, squeezing the elastic bladder 25; the output pipe 20 is also connected to the booster pump 21, the sealed chamber 11 is used to seal the circuit and hydraulic components, and the sealed chamber 11 is equipped with a hydraulic telescopic rod 12 and a rotating motor. The sealed control box 22 controls the operation of the annular heating element 18, the cylindrical heating block 19, the motor, the hydraulic components, and the water injection switch 28.

[0032] like Figure 3 , 4As shown, a hydraulic lifting rod 14 is installed at the top of the grease injection sleeve 13. After the moving positioning mechanism is positioned with the ball valve body 1, the hydraulic lifting rod 14 drives the grease injection sleeve 13 to descend, and the grease injection sleeve 13 is pressed against the sealing hole 31. A bolt is installed in the sealing hole 31. The hydraulic telescopic rod 12 in the grease injection sleeve 13 extends under the action of the hydraulic components in the sealing chamber 11. A magnetic sleeve 10 is installed at the front end of the hydraulic telescopic rod 12. The magnetic sleeve 10 is sleeved with the bolt. The hydraulic telescopic rod 12 rotates forward and backward under the action of the rotating motor. A through sealing grease channel 29 is provided in the grease injection sleeve 13, which is connected to the output pipe 20 and the sealing hole 31 respectively.

[0033] Working principle and method of the present invention:

[0034] Deep-sea ball valves are typically used in wellhead control systems in deep-sea oil and gas development, located 2,000-3,000 meters below sea level. Due to the high pressure, low temperature, high salinity, and high corrosiveness of the deep-sea working environment, valves also face the problem of sealing failure, which is disastrous for subsea oil and gas pipelines.

[0035] As a deep-sea robot, its operation process includes four steps: approaching, positioning, opening the sealing hole 31, and sealing with grease. Its components include a mobile positioning mechanism and an automatic grease injection mechanism.

[0036] The mobile positioning mechanism includes a positioning device, a thruster 4, and balancing airbags 5. The positioning device is mounted on the balancing frame 3. The positioning device can acquire its coordinates relative to the valve in real time and automatically move towards the valve. During the movement, it can avoid obstacles using radar. The horizontal information of the actuator is obtained by sensors, and the air pump is controlled to adjust the gas volume of the four airbags 5 to maintain balance in real time. After positioning, the plug rod 2 is inserted into the lug of the ball valve body 1, and the electromagnetic adsorption rod 8 holds the ball valve body 1 to maintain stability.

[0037] The automatic grease injection mechanism adopts an integrated structure, with the grease injection hole and bolt disassembly assembly housed within the grease injection sleeve 13, completing the entire operation in a sealed environment. An elastic bladder 25 stores the sealing grease; the bladder 5 contracts during grease delivery for easy transport. A filter screen 16 is installed at the interface between the elastic bladder 25 and the left end cap to prevent clogging. The emergency sealing device compensates for pressure by connecting the control chamber 17 to seawater via a switch, while a booster pump 21 further increases the pressure to allow the sealing grease to enter the valve sealing hole 31. After entering the sealing hole 31, the sealing grease solidifies, sealing the entire interior of the ball valve body 1.

[0038] The working process of this invention is as follows: When a leak occurs, before the equipment is submerged, sealing grease is added to the elastic bladder 25 inside the cavity 17 through the injection pipe 15. After filling, the pipe opening is sealed with a sealing cap. After submersion, the moving positioning mechanism obtains the approximate position of the valve through the positioner, aligning the two positioning points on the valve with the two positioning points on the moving positioning mechanism in the vertical direction, and continuously approaches the valve through the propulsion device. When approaching the valve, the upper propeller 4 first pushes downwards, and the airbags 5 on the balance frame 3 dynamically adjust the level. The four airbags 5 contain different volumes of gas, thus having different buoyancy in the water, ensuring the balance of the moving positioning mechanism underwater and preventing it from tipping over during movement. At the same time, the balance state of the entire mechanism is obtained through a level sensor, which then controls the air pump to quickly inflate the airbags 5 to adjust the balance in real time. When the moving positioning mechanism is in a deeper position, the actuator can also be quickly floated to the surface by rapidly inflating the airbags 5.

[0039] After the moving positioning mechanism is attached to the ball valve body 1, the plug rod 2 is inserted into the ear hole. At this time, the four electromagnetic adsorption rods 8 are energized and adsorbed onto the ball valve body 1. The circuit of the entire moving positioning mechanism is sealed, and the cavity 17 is sealed by the O-ring seal 27. The hydraulic lifting rod 14 will press the grease injection sleeve 13 downward. At this time, the sealing gasket 30 will be pressed tightly against the valve cover surface of the ball valve. The grease injection sleeve 13 is fitted onto the sealing hole 31. The sealing gasket 30 isolates seawater and prevents high-pressure seawater from entering the cavity 17 and causing the sealing grease to leak. The support filter 26 supports the elastic bladder 25 to prevent the elastic bladder 25 containing the sealing grease from entering the output pipe 20 when the emergency sealing device is working, causing blockage of the sealing grease outlet.

[0040] The hydraulic telescopic rod 12 can rotate and move up and down. Extending downwards, its lower end has a rotatable magnetic sleeve 10 that matches the bolt. The magnetic sleeve 10 rotates the bolt. After the bolt falls out of the sealing hole 31, the hydraulic telescopic rod 12 retracts, and the strong magnet pulls the bolt out. During grease injection, the water injection switch 28 is opened, allowing seawater to enter the grease storage chamber 17. Due to valve leakage, high pressure is needed to deliver the grease to the sealing hole 31 on the valve. Since the pressure from seawater is insufficient, the booster pump 21 further increases the pressure of the grease flow, delivering it to the output pipe 20. The annular heating element 18 and the cylindrical heating block 19 prevent the grease from solidifying due to the low underwater temperature. The booster pump 21 is activated to deliver the grease to the grease flow channel 29, which then flows into the sealing hole 31 on the valve cover. After the sealing grease cools and solidifies, the magnetic sleeve 10 tightens the bolts in the opposite direction, the emergency seal is completed, the moving positioning mechanism disengages from the ball valve body 1, and then floats back for recovery.

[0041] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0042] The above are merely preferred embodiments of the present invention. Any person skilled in the art may modify the present invention or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent substitutions made based on the technical solutions of the present invention are within the scope of protection claimed by the present invention.

Claims

1. An emergency sealing device for ball valves in deep-sea applications, characterized in that: Includes cable (7), mobile positioning mechanism, automatic grease injection mechanism, and sealed chamber (11). Cable (7) is connected to the power supply system on the water to supply power to the electric components of the mobile positioning mechanism and the automatic grease injection mechanism. The mobile positioning mechanism includes a frame (3), a plug-in rod (2), an electromagnetic adsorption rod (8), a thruster (4), an air pipe (6), an airbag (5), and a locator. Multiple thrusters (4) are installed on the frame (3), and multiple airbags (5) are set on the top of the frame (3). The air pipe (6) is connected to a water-based air pump to provide air for the airbags (5) to control balance and lift. The electromagnetic adsorption rod (8) can adsorb the ball valve body (1) after being powered on, and the plug-in rod (2) can be inserted into the ear hole of the ball valve body (1). The ball valve body (1) is provided with two positioning launch points. The locator receives the signal from the positioning launch points and drives the thruster (4) and the airbag (5) to sink and approach the ball valve body (1). The automatic grease injection mechanism includes a cavity (17), a sealed chamber (11), a pressure balance pipe (9), a grease injection sleeve (13), an annular heating element (18), a cylindrical heating block (19), an elastic bladder (25), an output pipe (20), a hydraulic telescopic rod (12), and a sealing control box (22). An elastic bladder (25) is installed inside the cavity (17), and grease is injected into the elastic bladder (25). The elastic bladder (25) is connected to the output pipe (20), which injects the grease into the sealing hole (31) of the ball valve body (1) through the grease injection sleeve (13). The grease solidifies at a low temperature. Multiple annular heating elements (18) are evenly installed in a ring shape on the outside of the cavity (17) to heat the grease. The cylindrical heating block (19)... The output pipe (20) is installed on the cavity (17) and surrounds the outside of the cylindrical heating block (19). The cavity (17) is sealed. A water injection switch (28) and a pressure balance pipe (9) are installed on one side of the cavity (17). The pressure balance pipe (9) is connected to seawater. After the water injection switch (28) is opened, seawater enters the cavity (17) through the pressure balance pipe (9) and squeezes the elastic bladder (25). The output pipe (20) is also connected to a booster pump (21). The sealed chamber (11) is used to seal the circuit and hydraulic components. The sealed chamber (11) is equipped with a hydraulic telescopic rod (12) and a rotating motor. The sealed control box (22) controls the operation of the annular heating element (18), the cylindrical heating block (19), the motor, the hydraulic components, and the water injection switch (28). The top of the grease injection sleeve (13) is equipped with a hydraulic lifting rod (14). After the moving positioning mechanism is positioned with the ball valve body (1), the hydraulic lifting rod (14) drives the grease injection sleeve (13) to descend, and the grease injection sleeve (13) is pressed against the sealing hole (31). A bolt is provided in the sealing hole (31). The hydraulic telescopic rod (12) in the grease injection sleeve (13) extends under the action of the hydraulic components in the sealed chamber (11). A magnetic sleeve (10) is installed at the front end of the hydraulic telescopic rod (12). The magnetic sleeve (10) is sleeved with the bolt. The hydraulic telescopic rod (12) rotates forward and backward under the action of the rotating motor. A through sealing grease channel (29) is provided in the grease injection sleeve (13), which is connected to the output pipe (20) and the sealing hole (31) respectively.

2. The ball valve emergency sealing device for deep-sea operation as described in claim 1, characterized in that: The propeller (4) is an electric motor-driven propeller, and there are more than three of them.

3. An emergency sealing device for a ball valve in deep-sea operation according to claim 1 or 2, characterized in that: There are four airbags (5), and the air tube (6) is connected to four independent branches, which can adjust the air volume in different airbags (5) to maintain the dynamic balance of the frame (3). The air tube (6) is bidirectionally controlled to perform air supply and inhalation.

4. The ball valve emergency sealing device for deep-sea operation as described in claim 1, characterized in that: There are multiple annular heating elements (18), which have a double-layer structure, including a heating layer and a heat insulation layer, and are located on the inner or outer side of the cover (24).

5. An emergency sealing device for a ball valve in deep-sea operations according to any one of claims 2 and 4, characterized in that: A filter screen (16) is installed at the end of the pressure balancing pipe (9) that is in contact with seawater.

6. The ball valve emergency sealing device for deep-sea operation as described in claim 1, characterized in that: The cavity (17) includes an end plate, a cover (24), a fixing rod, and an O-ring (27). There are two end plates, which are supported by the fixing rod. The cover (24) is located between the two end plates. The O-ring (27) is installed between the end plate and the cover (24) for sealing. An elastic bladder (25) is installed inside the cover (24).

7. The ball valve emergency sealing device for deep-sea operation as described in claim 1, characterized in that: The elastic bladder (25) is connected to a three-way connector (23), which is also connected to an output tube (20) and an injection tube (15). The injection tube (15) is used to inject sealing grease.

8. The ball valve emergency sealing device for deep-sea operation as described in claim 1, characterized in that: A support filter (26) is installed at the connection between the elastic bladder (25) and the output pipe (20). The support filter (26) is cylindrical to prevent the elastic bladder (25) from contracting and blocking the output pipe (20).

Images