An underwater hydraulic pipe connector

Abstract

This invention relates to the field of pipe connection devices, specifically to an underwater hydraulic pipe connector, comprising an end flange, a housing, a lower flange, and a drive assembly. The housing contains a clamping component and an injection port, while the lower flange contains a sealing structure. The drive assembly includes a sealing drive component, a clamping drive component, and a locking structure. The locking structure includes a pressure ring and multiple locking blocks, each with a V-shaped block. A locking rod, pressing against the pressure ring, passes through the end flange. Through the cooperation of the locking structure and the locking rod, a hydraulic drive chamber is formed between the pressure ring, locking blocks, sealing drive component, and clamping drive component. The locking rod pushes the pressure ring, causing the sealing drive component and the clamping drive component to perform pipe clamping and pipe sealing operations, respectively. When the hydraulic drive gradually fails, the locking structure maintains the clamping force on the sealing drive component and the clamping drive component. Therefore, the clamping effect of the clamping structure and the sealing effect of the sealing structure on the pipe are not easily reduced when the hydraulic drive gradually fails.

Description

Technical Field

[0001] This invention relates to the field of pipe connection devices, and more specifically to an underwater hydraulic pipe connector. Background Technology

[0002] As the transportation equipment for offshore oil and gas extraction, the safety of subsea oil pipelines is crucial to the normal operation of offshore oil extraction systems. Compared with onshore pipelines, subsea pipelines face greater operational risks and a higher probability of failure, primarily due to their harsh working environment. Leaks in subsea oil pipelines not only cause the shutdown of offshore oil and gas fields and pollute the marine environment, but also disrupt the normal production and lives of the oil and gas suppliers. Furthermore, the low quality and high difficulty of underwater welding preclude the use of large vessels for pipe lifting and welding. Therefore, rapid repair and reconnection are essential in the event of a subsea oil pipeline leak to minimize losses. The repair and reconnection process involves cutting the leaking section into two segments, connecting each segment to a subsea pipeline connector, and then connecting the two connectors together. Among existing subsea pipeline connectors, hydraulically driven connectors are widely used in subsea pipeline connection, repair, and sealing due to their advantages of high-density gravity sealing, hydraulic drive, and automated operation.

[0003] Existing hydraulically driven pipe connectors mainly consist of a housing and a clamping structure and a sealing structure housed within the housing. The housing has an oil injection port communicating with an external oil injection system. The clamping structure includes a clamping drive and a clamping component, while the sealing structure includes a sealing drive and a sealing ring. After the pipe is inserted into the pipe connector, hydraulic oil is injected into the oil injection port via an ROV-controlled external oil injection system. Under the action of the hydraulic oil, the sealing drive and clamping drive move towards the sealing ring and the clamping structure, respectively. The sealing ring, under the pressure of the sealing drive, undergoes axial and radial deformation, ultimately contacting the pipe to achieve a seal. The clamping component, under the pressure of the clamping drive, undergoes radial displacement, causing it to clamp tightly against the outer wall of the pipe.

[0004] However, in the existing technology, the effect of hydraulic oil on the sealing drive component gradually fails, and the clamping of the clamping component and the deformation of the sealing ring both require stable pressure. If the effect of hydraulic oil on the sealing drive component and the clamping drive component gradually fails or weakens, it will lead to the clamping of the clamping structure and the sealing of the sealing structure gradually failing or weakening, thereby greatly reducing the clamping and sealing effect on the pipeline. Summary of the Invention

[0005] The technical solution adopted by this invention to solve its technical problem is: to provide an underwater hydraulic pipeline connector, comprising:

[0006] An end cap flange, a housing, and a lower flange are connected in sequence. The inner holes of the end cap flange, the housing, and the lower flange fit together to form a placement hole, into which the pipe is placed.

[0007] The housing is provided with a clamping component, and the housing is provided with an injection hole, which is connected to the oil injection system.

[0008] The lower flange is provided with a sealing structure, which is used to seal the gap between the pipe and the lower flange;

[0009] It also includes a drive assembly, which includes a sealing drive, a clamping drive, and a locking structure. The sealing drive is used to push the sealing structure to seal the pipe, and the clamping drive is used to drive the clamping component to clamp the pipe.

[0010] The locking structure includes a pressure ring and multiple locking blocks disposed within the housing. The locking blocks are spaced apart, and a hydraulic drive chamber is formed between the pressure ring, the locking blocks, the sealing drive component, and the clamping drive component. The hydraulic drive chamber is connected to the injection hole. A locking rod is provided on the end cover flange, and the end of the locking rod presses against the pressure ring. When locking, the locking rod pushes the pressure ring down, the locking blocks push the sealing drive component and the clamping drive component to slide, and the sealing structure deforms to form a seal. The clamping component clamps the pipeline.

[0011] Furthermore, the sealing drive component is provided with a first pushing inclined surface, the clamping drive component is provided with a second pushing inclined surface, and the locking block is provided with a V-shaped block. The tip of the V-shaped block is located between the first pushing inclined surface and the second pushing inclined surface. The V-shaped block pushes the sealing drive component and the clamping drive component to slide through the first pushing inclined surface and the second pushing inclined surface, respectively.

[0012] Furthermore, the pressure ring is provided with an inner conical surface three, and the locking block is provided with an outer conical surface three corresponding to the inner conical surface three. The pressure ring pushes the locking block to slide along the radial direction of the pipeline through the cooperation of the inner conical surface three and the outer conical surface three.

[0013] Furthermore, the clamping drive component is provided with a sliding part, and the sealing drive component is provided with a sliding groove that matches the sliding part. A sealing ring is provided in the sliding groove, and the sliding part is slidably disposed in the sliding groove. The sealing ring is used to seal the gap between the sliding groove and the sliding part.

[0014] Furthermore, the clamping drive component is provided with an outer ring groove and a lower positioning ring, and the pressure ring is provided with an inner ring groove and an upper positioning ring. The outer ring groove and the inner ring groove cooperate to form a positioning ring groove. The upper positioning ring and the lower positioning ring are both located in the positioning ring groove, and the inner wall and the outer wall of the lower positioning ring are in contact with the outer ring groove and the inner ring groove, respectively.

[0015] Furthermore, the upper positioning ring is provided with a positioning groove, and the lower positioning ring is provided with a positioning protrusion that matches the positioning groove. When the locking block pushes the sealing drive and the clamping drive to slide, the positioning protrusion and the positioning groove slide relative to each other.

[0016] Furthermore, the lower positioning ring is provided with an outer positioning ring groove and an inner positioning ring groove, and the positioning protrusion is located between the outer positioning ring groove and the inner positioning ring groove. An outer sealing ring and an inner sealing ring are respectively provided in the outer positioning ring groove and the inner positioning ring groove. The upper positioning ring presses on the outer sealing ring and the inner sealing ring. When the locking block pushes the sealing drive and the clamping drive to slide, the upper positioning ring pushes the outer sealing ring and the inner sealing ring to press the outer positioning ring groove and the inner positioning ring groove respectively.

[0017] Furthermore, the sealing drive component is provided with a sealing protrusion, and a sealing ring four is fitted on the sealing protrusion. The sealing protrusion is slidably disposed inside the housing, and the sealing ring four is used to seal the gap between the housing and the sealing protrusion.

[0018] Furthermore, the clamping component includes multiple slips, which are evenly distributed circumferentially along the periphery of the pipe. Each slip has an outer conical surface, and the clamping drive component has an inner conical surface that matches the outer conical surface. The clamping drive component pushes the slips to clamp the pipe through the cooperation of the inner conical surface and the outer conical surface.

[0019] Furthermore, the sealing structure includes an upper sealing ring, a lower sealing ring, and a spacer ring. The spacer ring is disposed between the upper sealing ring and the lower sealing ring. The spacer ring has a test hole one, and the lower flange has a test hole two that corresponds to and communicates with the test hole one. The outer periphery and inner wall of the spacer ring are both provided with annular grooves, and the two annular grooves are interconnected through the test hole one.

[0020] The beneficial effects of this invention are as follows: Through the cooperation of the locking structure and locking rod, a hydraulic drive chamber is formed between the pressure ring, locking block, sealing drive component, and clamping drive component. Simultaneously, hydraulic oil is injected into the hydraulic drive chamber, and the locking rod pushes the pressure ring. The pressure ring pushes the locking block to slide radially along the pipeline, and also pushes the sealing drive component and clamping drive component to slide respectively, thereby performing pipeline clamping and sealing operations. When the hydraulic drive gradually fails, the locking structure maintains the clamping force on the sealing drive component and the clamping drive component, ensuring that the clamping effect of the clamping structure and the sealing effect of the sealing structure on the pipeline are not easily reduced when the hydraulic drive gradually fails. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] In the picture: Figure 1An overall structural diagram of an underwater hydraulic pipeline connector provided by the present invention;

[0023] Figure 2 for Figure 1 A top view of the underwater hydraulic pipe connector shown;

[0024] Figure 3 for Figure 2 Sectional view along axis AA;

[0025] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0026] Figure 5 for Figure 3 Enlarged view at point B in the middle;

[0027] Figure 6 for Figure 3 Enlarged view at point C;

[0028] Figure 7 for Figure 6 The structure shown is a cross-sectional view in another state (at which point the clamping component is in a clamping state and the sealing structure is in a deformation sealing state).

[0029] Figure 8 for Figure 6 A sectional view of the middle section of the structure;

[0030] Figure 9 for Figure 3 Enlarged view at point D;

[0031] Figure 10 for Figure 1 Exploded view of the middle section of the structure;

[0032] Figure 11 for Figure 10 Exploded view of the middle section of the structure;

[0033] Figure 12 for Figure 1 A three-dimensional structural diagram of the part shown;

[0034] Figure 13 for Figure 3 A three-dimensional structural diagram of the middle section.

[0035] Explanation of reference numerals in the attached drawings: 10. End cap flange; 11. Locking rod; 12. Inner conical surface two; 13. Guide hole; 20. Housing; 21. Clamping component; 211. Slip; 2111. Outer conical surface one; 2112. Outer conical surface two; 22. Injection hole; 23. Protrusion; 231. Limiting pin; 30. Lower flange; 31. Sealing structure; 311. Upper sealing ring; 312. Lower sealing ring; 313. Spacer ring; 3131. Test hole one; 3132. Annular groove; 314. Gasket ring; 3141. Placement groove; 32. Test hole two; 41. Sealing drive component; 411. First pushing inclined surface; 412. Sliding groove; 4121. Sealing ring one; 413. Sealing protrusion; 4131. Sealing 42. Clamping drive component; 421. Second pushing inclined surface; 422. Sliding part; 423. Outer ring groove; 424. Inner conical surface one; 425. Lower positioning ring; 4251. Positioning protrusion; 4252. Outer positioning ring groove; 4253. Inner positioning ring groove; 4254. Outer sealing ring; 4255. Inner sealing ring; 4256. Inner conical surface four; 4257. Outer conical surface four; 431. Pressure ring; 4311. Inner conical surface three; 4312. Sealing ring two; 4313. Inner ring groove; 4314. Upper positioning ring; 4315. Positioning groove; 4316. Pushing inclined surface; 432. Locking block; 4321. V-block; 4322. Outer conical surface three; 4323. Limiting groove; 200. Pipe. Detailed Implementation

[0036] To make the technical problem to be solved, the technical solution, and the beneficial effects of this invention clearer, the invention will now be described in detail with reference to the accompanying drawings. This drawing is a simplified schematic diagram, illustrating only the basic aspects of the invention, and therefore only shows the components relevant to the invention. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0037] Please refer to Figure 1 , Figure 2 and Figure 3 This invention provides an underwater hydraulic pipe connector, comprising an end cap flange 10, a housing 20, and a lower flange 30 connected in sequence. The inner holes of the end cap flange 10, housing 20, and lower flange 30 mate to form a placement hole, into which a pipe 200 is placed. The housing 20 contains a clamping member 21, and the housing 20 has an injection hole 22, through which the housing 20 communicates with an oil injection system. Please refer to... Figure 9 The end cap flange 10 has a guide hole 13 at its opening, and the guide hole 13 has a trumpet-shaped structure. The guide hole 13 facilitates the entry of the pipe 200 into the placement hole.

[0038] Specifically, in this embodiment, the end cover flange 10, the housing 20 and the lower flange 30 are connected by bolts. The oil injection system is not shown in the figure. The oil injection system is controlled by ROV. When injecting oil, the ROV drives the oil injection system to inject high-pressure oil into the hydraulic drive chamber through the injection hole 22.

[0039] Please refer to Figure 6 and Figure 10 The clamping component 21 includes multiple slips 211, which are evenly distributed around the periphery of the pipe 200. Each slip has an outer conical surface 2111, and the clamping drive component 42 has an inner conical surface 424 that is adapted to the outer conical surface 2111. The clamping drive component 42 pushes the slips 2111 to clamp the pipe 200 through the cooperation of the inner conical surface 424 and the outer conical surface 2111.

[0040] Please refer to Figure 9 The slip 211 is also provided with an outer conical surface 2112, and the end cover flange 10 is provided with an inner conical surface 12 that is adapted to the outer conical surface 2112. The outer conical surface 2112 presses against the inner conical surface 12. Through the arrangement of the outer conical surface 2112 and the inner conical surface 12, when the slip 211 is pushed by the clamping drive member 42, an interference fit is formed between the outer conical surface 2112 and the inner conical surface 12, making it less likely for the slip 211 to be dislodged from the inner hole of the end cover flange 10 along the axial direction under force, thus improving the clamping stability.

[0041] The lower flange 30 is equipped with a sealing structure 31, which is used to seal the gap between the pipe 200 and the lower flange 30. Please refer to... Figure 5 and Figure 10 The sealing structure 31 includes an upper sealing ring 311, a lower sealing ring 312, and a spacer ring 313. The spacer ring is disposed between the upper sealing ring 311 and the lower sealing ring 312. The spacer ring 313 is provided with a test hole 3131. The lower flange 30 is provided with a test hole 32 that corresponds to and communicates with the test hole 3131. The outer periphery and inner wall of the spacer ring 313 are provided with annular grooves 3132. The two annular grooves 3132 are interconnected through the test hole 3131. When not being tested, the test hole 32 is sealed by a screw plug.

[0042] To test the sealing performance of the sealing ring after deformation, a spacer ring 313 is also provided between the upper sealing ring 311 and the lower sealing ring 312. When not being tested, the test hole 2 32 is sealed with a screw plug. When testing, the screw plug is removed, and the sealing performance of the upper sealing ring 311 and the lower sealing ring 312 is tested through the test hole 1 3131 and the test hole 2 32. If the tested pressure is stable and there is no leakage, then the upper sealing ring 311 and the lower sealing ring 312 have achieved the sealing effect, and the medium inside the pipeline 200 will not leak.

[0043] Please refer to Figure 5To prevent excessive deformation of the sealing ring, the sealing structure 31 also includes two sets of support structures. Each support structure includes two oppositely arranged gaskets 314, each with a placement groove 3141. A support groove is formed between the placement grooves 3141 of the two gaskets 314. The two sets of support structures correspond to the upper sealing ring 311 and the lower sealing ring 312, respectively, with the upper sealing ring 311 and the lower sealing ring 312 located within the support grooves formed by the corresponding support structures. Specifically, the two gaskets 314 in the same set of support structures are symmetrically distributed, and the axis of symmetry of the two gaskets 314 in the same set of support structures is set along the diameter direction of the pipe 200. In this embodiment, the gaskets 314 are made of metal.

[0044] Please refer to Figure 3 , Figure 4 and Figure 6 The underwater hydraulic pipeline connector also includes a drive assembly, which includes a sealing drive 41, a clamping drive 42, and a locking structure. The sealing drive 41 is used to push the sealing structure 31 to seal the pipeline 200, and the clamping drive 42 is used to drive the clamping member 21 to clamp the pipeline 200. Specifically, in this embodiment, both the sealing drive 41 and the clamping drive 42 are hollow annular structures.

[0045] Please refer to Figure 6 , Figure 7 , Figure 10 , Figure 11 and Figure 12 The sealing drive member 41 is provided with a first pushing inclined surface 411, and the clamping drive member 42 is provided with a second pushing inclined surface 421. The locking structure includes a pressure ring 431 and a plurality of locking blocks 432 disposed within the housing 20. The plurality of locking blocks 432 are spaced apart, and a hydraulic drive chamber is formed between the pressure ring 431, the locking blocks 432, the sealing drive member 41, and the clamping drive member 42. The hydraulic drive chamber is connected to the injection hole 22. The locking block 432 is provided with a V-shaped block 4321. The tip of the V-shaped block 4321 is located between the first pushing inclined surface 411 and the second pushing inclined surface 421. The V-shaped block 4321 pushes the sealing drive member 41 and the clamping drive member 42 to slide through the first pushing inclined surface 411 and the second pushing inclined surface 421, respectively. A locking rod 11 is provided on the end cover flange 10, and the end of the locking rod 11 presses against the pressure ring 431. When locked, the locking rod 11 pushes the pressure ring 431 down, causing the locking block 432 to push the sealing drive 41 and the clamping drive 42 to slide, causing the sealing structure 31 to deform and form a seal, and the clamping structure to clamp the pipe 200.

[0046] Specifically, in this embodiment, please refer to Figure 4Both the first pushing inclined surface 411 and the second pushing inclined surface 421 are external conical structures coaxially arranged with the pipe 200. In addition, in order to prevent the locking block 432 and the injection of hydraulic oil from interfering with each other, the injection hole 22 and the locking block 432 are staggered.

[0047] The locking structure and locking rod 11 work together to form a hydraulic drive chamber between the pressure ring 431, locking block 432, sealing drive 41, and clamping drive 42. While hydraulic oil is injected into the hydraulic drive chamber, the locking rod 11 pushes the pressure ring 431, which in turn pushes the locking block 432 to slide radially along the pipe 200. This, in turn, pushes the sealing drive 41 and clamping drive 42 to slide respectively, thus clamping and sealing the pipe 200. When the hydraulic drive gradually fails, the locking structure maintains the clamping force on the sealing drive 41 and clamping drive 42, ensuring that the clamping effect of the sealing drive 41 on the pipe 200 and the sealing effect of the sealing structure 31 on the pipe 200 are not easily reduced when the hydraulic drive gradually fails.

[0048] For details, please refer to Figure 6 and Figure 7 The pressure ring 431 is provided with an inner conical surface 4311, and the locking block 432 is provided with an outer conical surface 4322 corresponding to the inner conical surface 4311. The pressure ring 431 pushes the locking block 432 to slide along the radial direction of the pipe 200 through the cooperation of the inner conical surface 4311 and the outer conical surface 4322.

[0049] To limit the movement of locking block 432, please refer to... Figure 6 , Figure 7 and Figure 13 The inner wall of the housing 20 is provided with a protrusion 23, and the protrusion 23 is provided with a plurality of limiting pins 231 corresponding to the locking block 432. The locking block 432 is provided with a limiting groove 4323. The limiting pins 231 pass through the protrusion 23 and slide within the limiting groove 4323. The locking block 432 is slidably disposed on the protrusion 23 through the cooperation of the limiting pins 231 and the limiting groove 4323. Specifically, the protrusion 23 has an annular structure. Through the cooperation of the limiting pins 231 and the limiting groove 4323, the locking block 432 is limited in the circumferential direction along the outer periphery of the pipe 200, so that the locking block 432 can only slide in the radial direction along the pipe 200 and is not easily dislodged from the protrusion 23.

[0050] Please refer to Figure 4 , Figure 6 and Figure 7The clamping drive member 42 is provided with a sliding part 422, and the sealing drive member 41 is provided with a sliding groove 412 that is adapted to the sliding part 422. A sealing ring 4121 is provided in the sliding groove 412. The sliding part 422 is slidably disposed in the sliding groove 412. The sealing ring 4121 is used to seal the gap between the sliding groove 412 and the sliding part 422.

[0051] Please refer to Figure 6 , Figure 7 and Figure 11 A second sealing ring 4312 is fitted onto the pressure ring 431, which seals the gap between the pressure ring 431 and the housing 20. The clamping drive member 42 has an outer ring groove 423 and a lower positioning ring 425, while the pressure ring 431 has an inner ring groove 4313 and an upper positioning ring 4314. The outer ring groove 423 and the inner ring groove 4313 cooperate to form a positioning ring groove. Both the upper positioning ring 4314 and the lower positioning ring 425 are located within the positioning ring groove, and the inner and outer walls of the lower positioning ring 425 are in contact with the outer ring groove 423 and the inner ring groove 4313, respectively. Specifically, in this embodiment, the lower positioning ring 425 and the clamping drive member 42 are fixed by pre-embedded bolts embedded in the outer ring groove 423, and the upper positioning ring 4314 and the pressure ring 431 are fixed by pre-embedded bolts embedded in the upper end face of the pressure ring 431. The pre-embedded bolts are not shown in the figure.

[0052] The upper positioning ring 4314 and the lower positioning ring 425 form a continuous tortuous gap, which extends the flow path of hydraulic oil along the axial direction of the pipeline 200, reduces the possibility of hydraulic oil leakage along the gap between the clamping drive component 42 and the pressure ring 431, and improves the sealing performance.

[0053] Please refer to Figure 8 The upper positioning ring 4314 has a positioning groove 4315, and the lower positioning ring 425 has a positioning protrusion 4251 that matches the positioning groove 4315. When the locking block 432 pushes the sealing drive member 41 and the clamping drive member 42 to slide, the positioning protrusion 4251 and the positioning groove 4315 slide relative to each other. The positioning groove 4315 and the positioning protrusion 4251 facilitate the relative positioning of the upper positioning ring 4314 and the lower positioning ring 425.

[0054] The lower positioning ring 425 is provided with an outer positioning ring groove 4252 and an inner positioning ring groove 4253. The positioning protrusion 4251 is located between the outer positioning ring groove 4252 and the inner positioning ring groove 4253. An outer sealing ring 4254 and an inner sealing ring 4255 are respectively provided in the outer positioning ring groove 4252 and the inner positioning ring groove 4253. The upper positioning ring 4314 presses on the outer sealing ring 4254 and the inner sealing ring 4255. When the locking block 432 pushes the sealing drive member 41 and the clamping drive member 42 to slide, the upper positioning ring 4314 pushes the outer sealing ring 4254 and the inner sealing ring 4255 to press the outer positioning ring groove 4252 and the inner positioning ring groove 4253 respectively. Specifically, in this embodiment, the outer sealing ring 4254 is provided with an inner conical surface 4256, the inner sealing ring 4255 is provided with an outer conical surface 4257, and the upper positioning ring 4314 is provided with pushing inclined surfaces 4316 corresponding to the inner conical surface 4256 and the outer conical surface 4257 respectively. The upper positioning ring 4314 pushes the outer sealing ring 4254 and the inner sealing ring 4255 radially and compresses them through the pushing inclined surfaces 4316, thereby generating deformation and forming a seal.

[0055] With the cooperation of the upper positioning ring 4314, the outer sealing ring 4254, and the inner sealing ring 4255, when the pressure ring 431 pushes the locking block and the locking block pushes the clamping drive member 42 to slide, the pressure ring 431 and the clamping drive member 42 slide relative to each other, and the upper positioning ring 4314 and the lower positioning ring 425 slide relative to each other. This results in relative pressure between the upper positioning ring 4314 and the outer sealing ring 4254, and between the upper positioning ring 4314 and the inner sealing ring 4255. As a result, the outer sealing ring 4254 and the inner sealing ring 4255 are subjected to radial pressure along the pipe 200 and respectively press the outer positioning ring groove 4252 and the inner positioning ring groove 4253 along the radial direction of the pipe 200. This forms a double seal between the clamping drive member 42 and the pressure ring 431, thereby improving the sealing effect of the gap between the pressure ring 431 and the clamping drive member 42.

[0056] Please refer to Figure 6 The sealing drive component 41 is provided with a sealing protrusion 413, and a sealing ring 4131 is fitted on the sealing protrusion 413. The sealing protrusion 413 is slidably disposed within the housing 20, and the sealing ring 4131 is used to seal the gap between the housing 20 and the sealing protrusion 413. Through the cooperation of the sealing protrusion 413 and the protrusion 23, a continuous blocking structure is formed in the flow path of the hydraulic oil, thereby increasing the difficulty for the hydraulic oil to pass through, and thus improving the sealing effect between the sealing drive component 41 and the housing 20.

[0057] Meanwhile, the arrangement of sealing ring 4121, sealing ring 4312, outer sealing ring 4254, inner sealing ring 4255, sealing ring 4131 and sealing protrusion 413 forms a stable seal for the hydraulic drive cavity, making it difficult for hydraulic oil in the hydraulic drive cavity to overflow.

Claims

1. An underwater hydraulic pipe connector, comprising an end cap flange (10), a housing (20), and a lower flange (30) connected in sequence, wherein the inner holes of the end cap flange (10), the housing (20), and the lower flange (30) cooperate to form a placement hole, and a pipe (200) is placed in the placement hole; a clamping member (21) is provided inside the housing (20), and an injection hole (22) is provided on the housing (20), the housing (20) being connected to an oil injection system through the injection hole (22); a sealing structure (31) is provided inside the lower flange (30), the sealing structure (31) being used to seal the gap between the pipe (200) and the lower flange (30), characterized in that: It also includes a drive assembly, which includes a sealing drive (41), a clamping drive (42) and a locking structure. The sealing drive (41) is used to push the sealing structure (31) to seal the pipe (200), and the clamping drive (42) is used to drive the clamping member (21) to clamp the pipe (200). The locking structure includes a pressure ring (431) and a plurality of locking blocks (432) disposed in the housing (20). The locking blocks (432) are spaced apart. A hydraulic drive chamber is formed between the pressure ring (431), the locking blocks (432), the sealing drive member (41), and the clamping drive member (42). The hydraulic drive chamber is connected to the injection hole (22). A locking rod (11) is provided on the end cover flange (10). The end of the locking rod (11) presses against the pressure ring (431). When locking, the locking rod (11) pushes the pressure ring (431) down, and the locking blocks (432) push the sealing drive member (41) and the clamping drive member (42) to slide, so that the sealing structure (31) deforms to form a seal, and the clamping member (21) clamps the pipe (200).

2. The underwater hydraulic pipe connector according to claim 1, characterized in that: The sealing drive member (41) is provided with a first pushing inclined surface (411), the clamping drive member (42) is provided with a second pushing inclined surface (421), and the locking block (432) is provided with a V-shaped block (4321). The tip of the V-shaped block (4321) is located between the first pushing inclined surface (411) and the second pushing inclined surface (421). The V-shaped block (4321) pushes the sealing drive member (41) and the clamping drive member (42) to slide through the first pushing inclined surface (411) and the second pushing inclined surface (421) respectively.

3. The underwater hydraulic pipe connector according to claim 1, characterized in that: The pressure ring (431) is provided with an inner conical surface three (4311), and the locking block (432) is provided with an outer conical surface three (4322) corresponding to the inner conical surface three (4311). The pressure ring (431) pushes the locking block (432) to slide along the radial direction of the pipe (200) through the cooperation of the inner conical surface three (4311) and the outer conical surface three (4322).

4. The underwater hydraulic pipe connector according to claim 1, characterized in that: The clamping drive (42) is provided with a sliding part (422), and the sealing drive (41) is provided with a sliding groove (412) that is adapted to the sliding part (422). A sealing ring (4121) is provided in the sliding groove (412). The sliding part (422) is slidably disposed in the sliding groove (412). The sealing ring (4121) is used to seal the gap between the sliding groove (412) and the sliding part (422).

5. The underwater hydraulic pipe connector according to claim 1, characterized in that: The clamping drive component (42) is provided with an outer ring groove (423) and a lower positioning ring (425), and the pressure ring (431) is provided with an inner ring groove (4313) and an upper positioning ring (4314). The outer ring groove (423) and the inner ring groove (4313) cooperate to form a positioning ring groove. The upper positioning ring (4314) and the lower positioning ring (425) are both located in the positioning ring groove, and the inner wall and the outer wall of the lower positioning ring (425) are in contact with the outer ring groove (423) and the inner ring groove (4313) respectively.

6. The underwater hydraulic pipe connector according to claim 5, characterized in that: The upper positioning ring (4314) is provided with a positioning groove (4315), and the lower positioning ring (425) is provided with a positioning protrusion (4251) that matches the positioning groove (4315). When the locking block (432) pushes the sealing drive (41) and the clamping drive (42) to slide, the positioning protrusion (4251) and the positioning groove (4315) slide relative to each other.

7. The underwater hydraulic pipe connector according to claim 6, characterized in that: The lower positioning ring (425) is provided with an outer positioning ring groove (4252) and an inner positioning ring groove (4253). The positioning protrusion (4251) is located between the outer positioning ring groove (4252) and the inner positioning ring groove (4253). The outer positioning ring groove (4252) and the inner positioning ring groove (4253) are respectively provided with an outer sealing ring (4254) and an inner sealing ring (4255). The upper positioning ring (4314) presses on the outer sealing ring (4254) and the inner sealing ring (4255). When the locking block (432) pushes the sealing drive (41) and the clamping drive (42) to slide, the upper positioning ring (4314) pushes the outer sealing ring (4254) and the inner sealing ring (4255) to press the outer positioning ring groove (4252) and the inner positioning ring groove (4253) respectively.

8. The underwater hydraulic pipe connector according to claim 7, characterized in that: The sealing drive component (41) is provided with a sealing protrusion (413), and a sealing ring four (4131) is fitted on the sealing protrusion (413). The sealing protrusion (413) is slidably disposed in the housing (20), and the sealing ring four (4131) is used to seal the gap between the housing (20) and the sealing protrusion (413).

9. The underwater hydraulic pipe connector according to claim 1, characterized in that: The clamping component (21) includes multiple clamps (211), which are evenly distributed around the periphery of the pipe (200). Each clamp (211) has an outer conical surface (2111), and the clamping drive component (42) has an inner conical surface (424) that is adapted to the outer conical surface (2111). The clamping drive component (42) pushes the clamps (211) to clamp the pipe (200) through the cooperation of the inner conical surface (424) and the outer conical surface (2111).

10. The underwater hydraulic pipe connector according to claim 1, characterized in that: The sealing structure (31) includes an upper sealing ring (311), a lower sealing ring (312), and a spacer ring (313). The spacer ring (313) is disposed between the upper sealing ring (311) and the lower sealing ring (312). The spacer ring (313) is provided with a test hole one (3131). The lower flange (30) is provided with a test hole two (32) that corresponds to and communicates with the test hole one (3131). The outer periphery and inner wall of the spacer ring (313) are provided with annular grooves (3132). The two annular grooves (3132) are interconnected through the test hole one (3131).

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