Underwater butt-joint assembly, operation equipment and operation method of underwater butt-joint assembly

Abstract

The invention discloses an underwater butt joint assembly, operation equipment and an operation method thereof, belongs to the technical field of underwater fluid conveying butt joint, and aims to solve the problems that an existing underwater butt joint assembly is not thorough in liquid drainage, low in sealing reliability, poor in connection stability and tedious in butt joint process. The assembly comprises a fixed joint, a connecting joint, a movable joint, a liquid inlet main pipe, a matched seal, a matched plug and a matched connecting assembly, the fixed joint and the connecting joint are detachably and fixedly connected through a bolt and correspondingly provided with a communicated liquid drainage channel, the liquid inlet main pipe fixedly penetrates through the movable joint, and a sealing circular plate is installed at one end of the liquid inlet main pipe; the plugging assembly realizes plugging of an annular groove through cooperation of a piston block and a sealing cylindrical block, the sealing assembly is in linkage with a semicircular check block to complete sealing and locking, during butt joint, after a sealing circular plate discharges liquid, a protective outer sleeve moves to expose a liquid discharging hole, a linkage structure realizes cooperative action of liquid discharging, sealing and locking, and the sealing performance and the butt joint stability are improved. The flow is simplified; and the service life is prolonged.

Description

Technical Field

[0001] This invention relates to the field of underwater operations technology, and in particular to an underwater docking assembly, operating equipment, and operating method thereof. Background Technology

[0002] Underwater docking assemblies are widely used in scenarios such as connecting underwater equipment. Their core function is to achieve rapid docking and sealing of underwater fluid transport channels, while ensuring the stability and reliability of the docking process. In the underwater environment, docking assemblies face multiple challenges such as water pressure, impurity interference, and seal failure. Existing underwater docking structures still have many shortcomings in practical applications.

[0003] During the docking process of existing underwater docking components, water easily remains at the joint connection, leading to a decrease in fluid transport efficiency after docking. Furthermore, the residual water may corrode the internal structure of the component, affecting its service life. Although some docking structures are equipped with drainage mechanisms, the drainage path design is unreasonable, resulting in incomplete drainage and difficulty in achieving coordinated control of drainage and sealing actions, easily leading to interference between the sealing components and the drainage channel.

[0004] It is difficult to balance sealing performance and connection stability during underwater docking. Traditional sealing structures often use a single sealing ring, which is prone to deformation and aging under water pressure, leading to seal failure. On the other hand, the connection and fixing mechanisms are mostly external designs, which are easily obstructed by underwater impurities during docking, making it impossible to achieve precise positioning and stable engagement. After docking, they are also prone to loosening due to water flow impact, affecting operational safety.

[0005] The existing components lack a coordinated design for sealing release and connection locking, requiring separate control by multiple drive components. This results in a cumbersome and time-consuming docking process, making it unsuitable for rapid underwater operations. Furthermore, some internal transmission components exhibit poor motion stability, making them prone to jamming in environments with varying underwater pressures, further reducing the reliability and lifespan of the docking components. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies, such as water residue at the joint during docking of docking components, unreasonable drainage path design, incomplete drainage, and the use of a single sealing ring in the sealing structure. This invention proposes an underwater docking component, operating equipment, and operating method.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: An underwater docking assembly includes a fixed connector, a connecting connector, a movable connector, and a liquid inlet main pipe; The fixed joint and the connecting joint are detachably connected by bolts. The two are respectively provided with a connected drainage channel. The connecting joint is provided with a circular groove and an annular groove, and the annular groove is connected to the circular groove and the drainage channel. The liquid inlet main pipe is fixed through the movable joint, and a sealing circular plate is fixedly installed at one end. The sealing circular plate cooperates with the circular groove to seal and discharge the internal water. The liquid inlet main pipe is equipped with a sealing component. The movable joint is slidably fitted with a protective outer sleeve. After the sealing circular plate is embedded in the circular groove, the protective outer sleeve moves to expose the drain hole II, so as to realize fluid conduction.

[0008] In one possible design, the fixed joint has a cavity II, and a sealing assembly is provided inside the cavity II. The sealing assembly includes a fixed sealing block, a piston block, and a sealing cylindrical block. A fixed sealing block is fixedly installed on the inner wall of cavity II. A piston block slides through the fixed sealing block. A sealing cylindrical block is fixedly connected to the piston block and seals the annular groove. A sliding cylindrical rod slides through the piston block. A sliding cylindrical block is fixedly installed at one end of the sliding cylindrical rod. A compression spring II is provided between the cylindrical groove of the sliding cylindrical block and the sealing cylindrical block.

[0009] In one possible design, a fixed inner cylinder is fixedly installed on the inner wall of the fixed joint, and the fixed inner cylinder has a cavity I, which is connected to a cavity II; a U-shaped groove is opened on the inner wall of cavity I, and a U-shaped plate slides through the U-shaped groove; a compression spring I is provided between the U-shaped plate and the U-shaped groove; and the U-shaped plate is limited by a piston block through an arc groove. The other end of the sliding rod is fixedly connected to a horizontal plate, and an annular push plate is sleeved on the horizontal plate. A cylindrical limit block is fixedly installed on the inner wall of the inner cylinder, and the annular push plate pushes the U-shaped plate to release the limit.

[0010] In one possible design, a drain hole III is provided on the inner wall of the circular groove, and an outer annular groove is provided on the connecting joint. The drain hole III is connected to the outer annular groove. A one-way valve is fixedly installed in the drain hole III. A sealing circular plate squeezes the water in the circular groove, and the water is discharged into the outer annular groove through the drain hole III. The one-way valve prevents the water from flowing back.

[0011] In one possible design, the sealing assembly includes a frustum block, a sliding annular baffle, and an inlet auxiliary pipe; A frustum block is fixed to the inner wall of the main liquid inlet pipe. An annular baffle is fixed inside the main liquid inlet pipe. A sliding annular baffle is slidably connected to the inner wall of the main liquid inlet pipe. An auxiliary liquid inlet pipe is fixedly embedded in the sliding annular baffle and has a drain hole I. A fixed annular baffle blocks the drain hole I, while fluid force pushes the sliding annular baffle to move and open the drain hole I.

[0012] In one possible design, a sealing ring is fixedly installed on the inner wall of the movable joint, and two semi-circular rings are slidably connected on one side of the sealing ring. A semi-circular block is fixedly installed on the inner wall of the semi-circular ring, and the two semi-circular blocks are attracted and sealed by a magnet. A conical groove is provided on the semi-circular stop block, which mates with the liquid inlet auxiliary pipe. A semi-circular ring is used to fix the insert block, and a slot is provided on the inner wall of the circular groove. The insert block is inserted into the slot to achieve a fixed connection.

[0013] In one possible design, multiple sealing rings I are fixedly embedded in the inner wall of the protective outer sleeve, and an annular cavity is opened on the outer wall of the liquid inlet main pipe, with the protective outer sleeve extending into the annular cavity; Sealing ring I fits against the outer wall of the liquid inlet main pipe and seals drain hole II before docking to prevent water from entering the liquid inlet main pipe.

[0014] In one possible design, the mating surfaces of the fixed joint and the connecting joint are provided with a sealing gasket. The sealing gasket is fixed to the end face of the fixed joint by adhesive bonding, and its size is adapted to the mating surface and avoids the drainage channel. The sealing gasket is made of nitrile rubber to improve the sealing performance of the connection and reduce fluid leakage between the drainage channel and the annular groove.

[0015] An operating device includes an underwater docking assembly as described above, and also includes a robotic arm.

[0016] A method for operating based on the above-mentioned operating equipment includes the following steps: S1. The robotic arm pushes the movable joint so that the sealing circular plate is embedded in the circular groove and pushes the sliding cylindrical block, squeezing and compressing the spring II while discharging water. S2. The movable joint continues to move, the protective outer sleeve enters the annular cavity, and the annular pusher plate pushes the U-shaped plate to release the piston block limit; S3. Fluid is introduced into the main inlet pipe, and the sliding annular baffle is pushed to make the auxiliary inlet pipe push the semi-circular block. The insert block is inserted into the slot and fixed. The fluid is conducted through the drain hole II, the annular groove and the drain channel.

[0017] In this application, when used underwater, when it is necessary to connect the movable joint to the connecting joint, the movable joint is pushed directly to the connecting joint by the robotic arm. At the beginning, the sealing disc is sent into the inside of the circular groove. At this time, the sealing cylinder block and the piston block are limited by the U-shaped plate and cannot move directly. The sealing disc will push the sliding cylinder block. The sliding cylinder block squeezes and compresses the spring II and drives the sliding rod to move laterally. The sealing disc gradually discharges the water inside the circular groove through the drain hole III. The drain hole III is equipped with a one-way valve so that the water can be discharged normally. As the movable joint continues to enter, the protective outer sleeve moves into the interior of the annular cavity, gradually exposing the drain hole II. The sliding round rod drives the connecting horizontal plate and the annular push plate to move laterally. The annular push plate pushes one end of the U-shaped plate and pushes the U-shaped plate outward. The U-shaped plate squeezes and compresses the spring I. At this time, the braking state of the piston block can be released. The sliding cylindrical block also fully enters the interior of the cylindrical groove. At this time, the sealing cylindrical block and the sliding cylindrical block move inward synchronously. The annular push plate moves outside the cylindrical limit block, and the connecting horizontal plate moves inside the strip hole to ensure the stability of the movement. As the piston block and the sealing cylindrical block move, the sealing cylindrical block exposes the annular groove, ensuring internal communication between the connecting joint and the fixed joint. At this time, fluid is sent into the main inlet pipe. Since the frustum block blocks the space between the two semi-circular blocks and the drain hole I is blocked by the fixed annular baffle, the fluid will push the sliding annular baffle to move laterally, and the sliding annular baffle will drive the auxiliary inlet pipe to move laterally. At this point, drain hole I is exposed. After the fluid is discharged through the inside of the inlet auxiliary pipe and drain hole I, the inlet auxiliary pipe moves forward and can cooperate with the conical groove to push the semi-circular stop. In the initial state, the two semi-circular stops are attracted to each other by magnets, which facilitates subsequent reset. The semi-circular stops drive the semi-circular rings to move, and the two semi-circular rings move away from each other. At this time, there is a gap between the semi-circular stops and the frustum block, which can drive the two inserts away from each other. The inserts extend from the inside of the rectangular insertion hole and can then be inserted into the inside of the slot, ensuring the stability of the connection between the movable joint and the connecting joint. The fluid is discharged through drain hole II, sent into the inside of the annular groove, and then discharged through the drain channel. Finally, the connection process is completed through the fixed joint.

[0018] Beneficial effects: The sealing circular plate and the circular groove work together to push the internal water out through the drain hole III at the initial stage of docking. The one-way valve prevents water backflow and ensures that there is no residual water on the docking surface. As the docking process progresses, the sealing cylindrical block moves synchronously to expose the annular groove, completing a smooth transition from the draining state to the connected state. This ensures thorough draining, prevents leakage during fluid transportation, and improves fluid transportation efficiency.

[0019] The protective outer sleeve engages with the annular cavity, dynamically sealing the drain hole II via sealing ring I. Combined with the tight seal between the sealing circular plate and the circular groove, a multi-layered sealing structure is formed, effectively resisting the impact of underwater pressure on sealing performance and reducing the risk of seal failure. The cooperation between the sliding and fixed annular baffles in the sealing assembly allows for selective sealing and unblocking of the inlet auxiliary pipe, further enhancing the sealing effect.

[0020] During the forward movement of the inlet auxiliary pipe, the fluid channel is opened, and the semi-circular stop is separated by cooperating with the conical groove, causing the insert block to insert into the slot, thus achieving automatic locking between the movable joint and the connecting joint. The two semi-circular stop blocks are magnetically attracted and reset, eliminating the need for additional driving components, shortening the docking time, and adapting to the needs of rapid underwater operations.

[0021] The annular push plate cooperates with the cylindrical limiting block, and the connecting horizontal plate slides along the strip hole, providing guidance and limiting for the movement of the sliding rod and piston block, preventing jamming during movement. The U-shaped plate, in cooperation with compression spring I and compression spring II, enables precise limiting and elastic reset of the piston block, buffering the impact of underwater pressure on internal components, reducing component wear, and improving the reliability of the assembly in complex underwater environments.

[0022] The overall structure adopts an integrated design with high coordination among components. It can complete the entire process of docking, sealing, and locking without the need for an external drive mechanism, reducing the difficulty of underwater operations. The detachable fixed joints and connecting joints facilitate later maintenance and component replacement, further improving the practicality and economy of the components. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural schematic diagram of an underwater docking assembly, operating equipment, and operating method proposed in this invention; Figure 2 This is a three-dimensional cross-sectional view of an underwater docking assembly, operating equipment, and operating method proposed in this invention. Figure 3 This is a three-dimensional sectional view of the protective outer sleeve in an underwater docking assembly, operating equipment, and operating method proposed in this invention. Figure 4 This is an exploded view of the liquid inlet main pipe and the semi-circular ring in an underwater docking assembly, operating equipment, and operating method proposed in this invention. Figure 5 This is an exploded view of the connecting joint and the fixing joint in an underwater docking assembly, operating equipment and operating method proposed in this invention; Figure 6 This is an exploded view of the fixed joint and U-shaped plate in an underwater docking assembly, operating equipment, and operating method proposed in this invention; Figure 7 This is an exploded view of the sealing cylindrical block and connecting joint in an underwater docking assembly, operating equipment, and operating method proposed in this invention.

[0024] In the diagram: 1. Fixed joint; 2. Connecting joint; 3. Protective outer sleeve; 4. Movable joint; 5. Fixed inner cylinder; 6. Main inlet pipe; 7. Sliding annular baffle; 8. Sealing cylindrical block; 9. Frustum block; 10. Sealing ring I; 11. Annular cavity; 12. Drain hole I; 13. Auxiliary inlet pipe; 14. Fixed annular baffle; 15. Sealing retaining ring; 17. Conical groove; 18. Sealing circular plate; 19. Drain hole II; 20. Rectangular insertion hole; 21. Semi-circular ring; 22. Insert block; 23. Semi-circular retaining block; 2 4. Cavity I; 25. Fixed sealing block; 26. Cavity II; 27. Sliding cylindrical block; 28. Drain hole III; 29. ​​Circular groove; 30. Slot; 31. Outer annular groove; 32. Drainage channel; 33. U-shaped groove; 34. Arc-shaped groove; 35. Strip hole; 36. Cylindrical limiting block; 37. Compression spring I; 38. U-shaped plate; 39. Compression spring II; 40. Annular push plate; 41. Connecting cross plate; 42. Sliding round rod; 43. Piston block; 44. Cylindrical groove; 45. Annular groove. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0026] In one embodiment: Refer to Figure 1-7 This embodiment discloses an underwater docking assembly. Multiple drainage channels 32 are provided on the sides of the fixed connector 1 and the connecting connector 2 that are close to each other. The multiple drainage channels 32 correspond to each other and are interconnected. The fixed connector 1 and the connecting connector 2 are detachably connected by screws. The drainage channels 32 are connected to the inner cavity of the fixed connector 1. One end of the connecting connector 2 has a circular groove 29. An annular groove 45 is provided inside the connecting connector 2. The annular groove 45 is located on the outer wall of the circular groove 29 and is connected to the circular groove 29. The annular groove 45 is connected to the multiple drainage channels 32. One end of the fixed connector 1 has a cavity II 26, which is connected to the circular groove 29. A sealing assembly for sealing the circular groove 29 is provided inside the cavity II 26.

[0027] Specifically, the sealing assembly includes a fixed sealing block 25 fixedly installed on the inner wall of cavity II 26, a fixed inner cylinder 5 fixedly installed on one side of the inner wall of the fixed connector 1, a cavity I 24 opened on one side of the fixed inner cylinder 5, cavity I 24 communicating with cavity II 26, a piston block 43 slidingly passing through the inside of the fixed sealing block 25, a sealing cylindrical block 8 fixedly installed at one end of the piston block 43, the sealing cylindrical block 8 slidably connected inside the cavity II 26, the sealing cylindrical block 8 is used to seal the annular groove 45, a sliding rod 42 slidingly passing through the inside of the piston block 43, a connecting horizontal plate 41 fixedly installed at one end of the sliding rod 42, and an annular pusher fixedly sleeved on the outer wall of the connecting horizontal plate 41. A cylindrical groove 44 is provided on one side of the plate 40 and the sealing cylindrical block 8. One end of the sliding rod 42 extends slidably into the interior of the cylindrical groove 44 and is fixedly installed with a sliding cylindrical block 27. A compression spring II 39 is provided between one side of the sliding cylindrical block 27 and one side of the inner wall of the cylindrical groove 44. Both ends of the compression spring II 39 abut against one side of the sliding cylindrical block 27 and one side of the inner wall of the cylindrical groove 44 through spring seats. A cylindrical limiting block 36 is fixedly installed on one side of the inner wall of the fixed inner cylinder 5. A strip hole 35 is provided inside the cylindrical limiting block 36. The annular push plate 40 is used in conjunction with the cylindrical limiting block 36. The connecting horizontal plate 41 is used in conjunction with the strip hole 35. A connecting horizontal plate 41 is fixedly installed at one end of the sliding round rod 42. An annular push plate 40 is fixedly sleeved on the outer wall of the connecting horizontal plate 41. Two guide rods parallel to the sliding round rod 42 are fixedly installed on the inner wall of the fixed inner cylinder 5. The guide rods slide through the connecting horizontal plate 41 and cooperate with the strip hole 35 to realize the bidirectional guiding and limiting of the connecting horizontal plate 41. Further, U-shaped grooves 33 are opened on the top inner wall and the bottom inner wall of the cavity I 24. A U-shaped plate 38 slides through the inside of the U-shaped groove 33. Two compression springs I 37 are symmetrically arranged between one side of the U-shaped plate 38 and one side of the inner wall of the U-shaped groove 33. Both ends of the compression springs I 37 abut against one side of the inner wall of the U-shaped groove 33 and one side of the U-shaped plate 38 through spring seats. Arc grooves 34 are opened on the bottom two sides of the U-shaped plate 38 that are close to each other. The U-shaped plate 38 is used to limit the piston block 43. Preferably, the U-shaped plate 38 is made of stainless steel, which has good corrosion resistance and structural strength, and is suitable for complex underwater environments.

[0028] The inner wall of the circular groove 29 has multiple drainage holes Ⅲ28. One end of the connecting joint 2 has an outer annular groove 31, which is connected to the multiple drainage holes Ⅲ28. A one-way valve is fixedly installed inside the drainage hole Ⅲ28, which can prevent the discharged water from flowing back into the circular groove 29. One end of the movable joint 4 is fixedly connected to the liquid inlet main pipe 6. The outer wall of the liquid inlet main pipe 6 has an annular cavity 11. One end of the movable joint 4 is slidably fitted with a protective outer sleeve 3 through a slider and a slide rail. One end of the protective outer sleeve 3 extends into the interior of the annular cavity 11. The outer wall of the liquid inlet main pipe 6 has multiple drainage holes Ⅱ19. The inner wall of the protective outer sleeve 3 is fixedly embedded with multiple sealing rings Ⅰ10. The protective outer sleeve 3 is used to seal the drainage holes Ⅱ19. The inside of the liquid inlet main pipe 6 is provided with a sealing component for sealing the drainage holes Ⅱ19. One end of the movable joint 4 is fitted with a protective outer sleeve 3 via a slider and a slide rail. A telescopic dustproof sealing ring is fitted on the outside of the slide rail. The two ends of the telescopic dustproof sealing ring are fixedly connected to the end face of the movable joint 4 and the inner wall of the protective outer sleeve 3, respectively, to prevent underwater impurities from entering the gap between the slider and the slide rail.

[0029] Specifically, the sealing assembly includes a frustum block 9 fixedly installed on the inner wall of one side of the liquid inlet main pipe 6, a sealing retaining ring 15 fixedly installed on the inner wall of the movable joint 4, the sealing retaining ring 15 being located on one side of multiple drain holes II 19, a fixed annular baffle 14 fixedly installed inside the liquid inlet main pipe 6, a sliding annular baffle 7 slidably connected to the inner wall of the liquid inlet main pipe 6, a liquid inlet auxiliary pipe 13 fixedly embedded inside the sliding annular baffle 7, one end of the liquid inlet auxiliary pipe 13 being open, multiple drain holes I 12 communicating with the opening being opened on the outer wall of the liquid inlet auxiliary pipe 13, the fixed annular baffle 14 being used to block the drain holes I 12, and a sealing circular plate 18 fixedly installed at one end of the liquid inlet main pipe 6, the sealing circular plate 18 being used in conjunction with the circular groove 29. Furthermore, the outer wall of the movable connector 4 has two symmetrically arranged rectangular insertion holes 20. One side of the sealing ring 15 is slidably connected to two symmetrically arranged semi-circular rings 21 via a slider and slide rail. A semi-circular stop block 23 is fixedly installed on the inner wall of one side of each semi-circular ring 21. A conical groove 17 is provided on one side of each semi-circular stop block 23. Magnets are fixedly embedded on the sides of the two semi-circular stop blocks 23 that are close to each other, and the two magnets attract each other. An insertion block 22 is fixedly installed at one end of each semi-circular ring 21, and the insertion block 22 is slidably connected inside the rectangular insertion hole 20. The inner wall of the circular groove 29 has a communicating slot 30, which engages with the insertion block 22. The conical groove 17 is used in conjunction with one end of the liquid inlet auxiliary pipe 13. After the two semi-circular stop blocks 23 are engaged, they engage with one end of the frustum block 9 to seal the sealing ring 15. Preferably, the sealing circular plate 18 is made of fluororubber, which can maintain good sealing performance in a high-pressure underwater environment and reduce the risk of fluid leakage.

[0030] The inlet main pipe 6 is internally equipped with a connecting component for connecting the connecting joint 2 and the movable joint 4. Based on this, during underwater docking operations, the movable joint 4 is pushed towards the connecting joint 2 by a robotic arm. The sealing circular plate 18 first enters the circular groove 29. At this time, the sealing cylindrical block 8 and the piston block 43 are both limited by the U-shaped plate 38 and cannot move. The sealing circular plate 18 pushes the sliding cylindrical block 27. The sliding cylindrical block 27 squeezes and compresses the spring II 39 and drives the sliding circular rod 42 to move laterally. The sealing circular plate 18 gradually discharges the water inside the circular groove 29 into the outer annular groove 31 through the drain hole III 28. The one-way valve ensures that the water can only be discharged in one direction to avoid backflow. As the movable joint 4 continues to approach, the protective outer sleeve 3 moves along the slide rail into the annular cavity 11, gradually exposing the drain hole II 19. The sliding rod 42 simultaneously drives the connecting horizontal plate 41 and the annular push plate 40 to move laterally. The annular push plate 40 abuts against one end of the U-shaped plate 38 and pushes it outward. The U-shaped plate 38 squeezes and compresses the spring I 37, releasing the braking state of the piston block 43. The sliding cylindrical block 27 completely enters the cylindrical groove 44. The sealing cylindrical block 8 and the sliding cylindrical block 27 move inward synchronously. The annular push plate 40 slides outside the cylindrical limit block 36. The connecting horizontal plate 41 moves along the strip hole 35 to ensure the overall movement stability.

[0031] During the movement of piston block 43 and sealing cylindrical block 8, sealing cylindrical block 8 disengages from the sealing of annular groove 45, allowing the internal connection of connecting joint 2 and fixed joint 1 to be made. At this time, fluid is sent into the liquid inlet main pipe 6. Frustum block 9 blocks the space between two semi-circular blocks 23, and drain hole I 12 is blocked by fixed annular baffle 14. Fluid force pushes sliding annular baffle 7 to move laterally, and sliding annular baffle 7 drives liquid inlet auxiliary pipe 13 to move forward synchronously. As the drain hole I12 moves forward and disengages from the blockage of the fixed annular baffle 14, the fluid is discharged through the inside of the inlet auxiliary pipe 13 and the drain hole I12. After the inlet auxiliary pipe 13 moves forward, it comes into contact with the conical groove 17 and pushes the semi-circular stop 23. The two semi-circular stops 23 overcome the magnetic attraction force and move away from each other, causing the semi-circular ring 21 to slide along the slide rail. A gap is formed between the semi-circular stop 23 and the frustum block 9. At the same time, the semi-circular ring 21 drives the two inserts 22 to extend from the rectangular insertion hole 20 and insert into the slot 30, realizing a stable connection between the movable joint 4 and the connecting joint 2. The fluid is discharged into the annular groove 45 through the drain hole II19, and then enters the inner cavity of the fixed joint 1 through the drain channel 32, completing the entire docking and connection process. Based on this, after the docking is completed, the fluid supply is stopped, the compression spring I 37 pushes the U-shaped plate 38 to reset and reposition the piston block 43, the magnet drives the two semi-circular blocks 23 to fit and reset, the insert block 22 disengages from the slot 30, the protective outer sleeve 3 resets and seals the drain hole II 19, thus realizing the separation of the movable joint 4 and the connecting joint 2.

[0032] This application can be used in the field of underwater operations, or in other fields applicable to this application.

[0033] In another embodiment: Reference Figure 1-7 This invention discloses an underwater docking assembly, operating equipment, and operating method, applicable in the field of underwater operations. The structure of this embodiment is basically the same as the aforementioned embodiments, except that a sealing gasket can be added to the mating surfaces of the fixed joint 1 and the connecting joint 2 to further improve the sealing performance of the connection and reduce fluid leakage at the connection between the drain channel 32 and the annular groove 45. Specifically, the sealing gasket is fixed to the end face of the fixed joint 1 by adhesive bonding. Its size is adapted to the mating surface of the connecting joint 2 and avoids the position of the drain channel 32, ensuring normal connectivity of the drain channel 32. Preferably, the sealing gasket is made of nitrile rubber, which has excellent oil resistance and wear resistance, suitable for various fluid transport scenarios.

[0034] The drain hole Ⅲ28 is internally fitted with a one-way valve via threads. The mating surface between the one-way valve and the drain hole Ⅲ28 is equipped with a fluororubber gasket. The valve core of the one-way valve is made of stainless steel, and a wedge-shaped sealing structure is provided between the valve core and the valve seat to ensure one-way sealing performance under high-pressure underwater conditions.

[0035] This device requires maintenance every 30 days during underwater operation. This involves disassembling the connecting bolts of the fixed joint 1 and the connecting joint 2, cleaning impurities from the slide rail, guide rod, and piston block 43, applying underwater-specific grease, and then reassembling to ensure smooth operation of all sliding components.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An underwater docking assembly, characterized in that, include Fixed connector (1), connecting connector (2), movable connector (4) and liquid inlet main pipe (6); The fixed joint (1) and the connecting joint (2) are detachably connected by bolts. The two are respectively opened to form a drainage channel (32). The connecting joint (2) is opened to form a circular groove (29) and an annular groove (45). The annular groove (45) connects the circular groove (29) and the drainage channel (32). The liquid inlet main pipe (6) is fixedly connected to the movable joint (4), and a sealing round plate (18) is fixedly installed at one end. The sealing round plate (18) cooperates with the circular groove (29) to seal and discharge the internal water. The liquid inlet main pipe (6) is provided with a sealing component. The movable joint (4) is slidably fitted with a protective outer sleeve (3). After the sealing round plate (18) is embedded in the circular groove (29), the protective outer sleeve (3) moves to expose the drain hole II (19) to realize fluid conduction.

2. The underwater docking assembly according to claim 1, characterized in that, The fixed joint (1) has a cavity II (26), and a sealing assembly is provided in the cavity II (26). The sealing assembly includes a fixed sealing block (25), a piston block (43), and a sealing cylindrical block (8). The fixed sealing block (25) is fixedly installed on the inner wall of cavity II (26), the piston block (43) slides through the fixed sealing block (25), and the sealing cylindrical block (8) is fixedly connected to the piston block (43) and seals the annular groove (45). The piston block (43) slides through the sliding rod (42), and a sliding cylindrical block (27) is fixed at one end of the sliding rod (42). A compression spring II (39) is provided between the sliding cylindrical block (27) and the cylindrical groove (44) of the sealing cylindrical block (8).

3. The underwater docking assembly according to claim 2, characterized in that, The inner wall of the fixed joint (1) is fixedly fitted with a fixed inner cylinder (5), and the fixed inner cylinder (5) has a cavity I (24) that is connected to a cavity II (26). A U-shaped groove (33) is opened on the inner wall of cavity I (24). A U-shaped plate (38) slides through the U-shaped groove (33). A compression spring I (37) is provided between the U-shaped plate (38) and the U-shaped groove (33). Arc grooves (34) are opened on both sides of the bottom of the U-shaped plate (38). The U-shaped plate (38) limits the piston block (43) through the arc grooves (34). The other end of the sliding rod (42) is fixedly connected to a horizontal plate (41), and a ring pusher plate (40) is sleeved on the horizontal plate (41). A cylindrical limit block (36) is fixedly installed on the inner wall of the inner cylinder (5), and the ring pusher plate (40) pushes the U-shaped plate (38) to release the limit.

4. The underwater docking assembly according to claim 1, characterized in that, The inner wall of the circular groove (29) is provided with a drain hole Ⅲ (28), and the connecting joint (2) is provided with an outer annular groove (31). The drain hole Ⅲ (28) is connected to the outer annular groove (31). A one-way valve is fixedly installed in the drain hole Ⅲ (28). The sealing circular plate (18) squeezes the water in the circular groove (29). The water is discharged into the outer annular groove (31) through the drain hole Ⅲ (28). The one-way valve prevents the water from flowing back.

5. The underwater docking assembly according to claim 1, characterized in that, The sealing assembly includes a frustum block (9), a sliding annular baffle (7), and an inlet auxiliary pipe (13). The frustum block (9) is fixed to the inner wall of the liquid inlet main pipe (6). The liquid inlet main pipe (6) is fixed to the annular baffle (14). The sliding annular baffle (7) is slidably connected to the inner wall of the liquid inlet main pipe (6). The liquid inlet auxiliary pipe (13) is fixed to the sliding annular baffle (7) and has a drain hole I (12). The fixed annular baffle (14) blocks the drain hole I (12), and the fluid force pushes the sliding annular baffle (7) to move so that the drain hole I (12) is open.

6. The underwater docking assembly according to claim 5, characterized in that, The inner wall of the movable joint (4) is fixedly fitted with a sealing ring (15), and two semi-circular rings (21) are slidably connected on one side of the sealing ring (15). The inner wall of the semi-circular ring (21) is fixedly fitted with a semi-circular block (23), and the two semi-circular blocks (23) are attracted and sealed by a magnet. A conical groove (17) is opened on the semi-circular stop (23). The conical groove (17) cooperates with the liquid inlet auxiliary pipe (13). The semi-circular ring (21) is fixed to the insert (22). A slot (30) is opened on the inner wall of the circular groove (29). The insert (22) is inserted into the slot (30) to achieve a fixed connection.

7. The underwater docking assembly according to claim 1, characterized in that, The inner wall of the protective outer sleeve (3) is fixedly embedded with multiple sealing rings I (10), and the outer wall of the liquid inlet main pipe (6) is provided with an annular cavity (11), and the protective outer sleeve (3) extends into the annular cavity (11); The sealing ring I (10) fits against the outer wall of the liquid inlet pipe (6) and the drain hole II (19) is sealed before docking to prevent water from entering the liquid inlet pipe (6).

8. The underwater docking assembly according to claim 7, characterized in that, The mating surfaces of the fixed joint (1) and the connecting joint (2) are provided with sealing gaskets. The sealing gaskets are fixed to the end face of the fixed joint (1) by adhesive bonding. The size is adapted to the mating surface and avoids the drainage channel (32). The sealing gasket is made of nitrile rubber, which improves the sealing performance of the connection and reduces fluid leakage between the drain channel (32) and the annular groove (45).

9. A working device, characterized in that, The underwater docking assembly includes any one of claims 1-8, and also includes a robotic arm.

10. A method for operating equipment based on the operating equipment of claim 9, characterized in that, Includes the following steps: S1. The robotic arm pushes the movable joint (4) so ​​that the sealing circular plate (18) is embedded in the circular groove (29) and pushes the sliding cylindrical block (27) to squeeze the compression spring II (39) and discharge water. S2, the movable joint (4) continues to move, the protective outer sleeve (3) enters the annular cavity (11), and the annular push plate (40) pushes the U-shaped plate (38) to release the piston block (43) from its limit; S3. Fluid is introduced into the main inlet pipe (6), and the sliding annular baffle (7) is pushed so that the auxiliary inlet pipe (13) pushes the semi-circular block (23). The insert (22) is inserted into the slot (30) and fixed. The fluid is connected through the drain hole II (19), the annular groove (45) and the drain channel (32).

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