Manual-hydraulic linkage integrated ultrahigh-pressure flat gate valve

Abstract

The invention relates to the technical field of valves, and discloses a manual-hydraulic linkage integrated ultrahigh-pressure flat gate valve which comprises a valve body, a valve seat is fixedly mounted in the valve body, an upper valve cover and a lower valve cover are fixedly connected to the two sides of the valve body, a hydraulic cylinder is connected to the upper valve cover, a hydraulic piston is slidably mounted in the hydraulic cylinder, and a hydraulic cylinder is connected to the lower valve cover. The hydraulic cylinder is fixedly connected with a return pipe communicated with the areas on the two sides of the hydraulic piston, the return pipe is fixedly provided with a straight-through stop valve, the hydraulic piston is fixedly connected with an upper valve rod, the end, away from the hydraulic piston, of the upper valve rod is fixedly provided with a valve plate used in cooperation with the valve seat, and the lower valve deck is rotationally provided with a bearing seat. And a ball screw nut is fixedly mounted in the bearing seat. The valve has the beneficial effects that the state of the valve can be adjusted in a hydraulic mode and a manual mode, it is ensured that the valve is controllable at any time, and the system safety redundancy is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of valve technology, specifically to an integrated manual-hydraulic high-pressure flat gate valve. Background Technology

[0002] In industrial fields such as ultra-deep oil and gas drilling and production, ultra-high pressure flat gate valves serve as the core opening and closing equipment of well control systems. Their operational reliability, ease of operation, and sealing stability directly determine the safety level and operational efficiency of the entire operating system. Currently, flat gate valves used in ultra-high pressure conditions generally suffer from technical defects such as a single drive method, redundant and complex structure, poor sealing reliability, large operating torque, and insufficient emergency response capabilities, making them difficult to adapt to the stringent requirements of industrial operations.

[0003] Existing ultra-high pressure flat gate valves have a single driving method and lack emergency operation capabilities. Purely hydraulically driven gate valves are highly dependent on external hydraulic stations and power sources. Once a hydraulic system failure occurs, the valve will be unable to perform opening and closing actions. Although purely manually driven gate valves can be operated independently, the operating torque is extremely large under ultra-high pressure and large-diameter conditions, making manual opening and closing difficult and inefficient, and unable to meet the requirements of automated and rapid opening and closing in engineering operations. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a device for valves, thereby achieving stable and rapid opening and closing of valves.

[0005] The objective of this invention can be achieved through the following technical solutions: A hand-hydraulic integrated ultra-high pressure flat gate valve includes a valve body, a valve seat fixedly installed inside the valve body, an upper valve cover and a lower valve cover fixedly connected to both sides of the valve body, a hydraulic cylinder connected to the upper valve cover, a hydraulic piston slidably installed inside the hydraulic cylinder, a return pipe connecting the two sides of the hydraulic piston fixedly connected to the hydraulic cylinder, a straight-through shut-off valve fixedly installed on the return pipe, a second handwheel for opening and closing provided on the straight-through shut-off valve, an upper valve stem fixedly connected to the hydraulic piston, a valve plate cooperating with the valve seat fixedly installed at the end of the upper valve stem away from the hydraulic piston, a bearing seat rotatably installed on the lower valve cover, a ball screw nut fixedly installed inside the bearing seat, a conversion joint fixedly installed at the end of the bearing seat, and a first handwheel fixedly installed at the end of the conversion joint, a ball screw rotatably connected inside the ball screw nut, a lower valve stem coaxially arranged rotatably connected to the end of the ball screw, and the lower valve stem fixedly connected to the valve plate.

[0006] As a further embodiment of the present invention: a hydraulic cylinder upper cover and a hydraulic cylinder lower cover are fixedly installed at both ends of the hydraulic cylinder, the hydraulic cylinder upper cover and the hydraulic cylinder lower cover are connected by fixing screws, the hydraulic cylinder lower cover is fixedly connected to the upper valve cover, and both the hydraulic cylinder upper cover and the hydraulic cylinder lower cover are provided with a first hydraulic oil passage communicating with the internal area of ​​the hydraulic cylinder, the first hydraulic oil passage being connected to external hydraulic equipment.

[0007] As a further aspect of the present invention: both the upper cover and the lower cover of the hydraulic cylinder are provided with a second hydraulic oil passage that communicates with the internal area of ​​the hydraulic cylinder, and both ends of the return pipe are connected to the corresponding second hydraulic oil passage.

[0008] As a further aspect of the present invention: a groove is provided on the upper cover of the hydraulic cylinder, and a second rotating shaft is rotatably installed in the groove. The second rotating shaft passes through the upper cover of the hydraulic cylinder and is coaxially arranged with a portion of the first hydraulic oil passage. The second rotating shaft is slidably and sealingly connected to the hydraulic piston. A baffle for sealing the first hydraulic oil passage on the upper cover and lower cover of the hydraulic cylinder is provided on the second rotating shaft. The second rotating shaft is rotatably connected to the second handwheel.

[0009] As a further aspect of the present invention: a limiting groove is provided at the end of the first hydraulic oil passage that communicates with the internal area of ​​the hydraulic cylinder, a baffle is slidably installed in the limiting groove and the baffle is threadedly connected to the second rotating shaft, and a retaining ring that cooperates with the baffle is fixedly installed in the first hydraulic oil passage.

[0010] As a further embodiment of the present invention: a support plate is fixedly installed in the groove, and a first rotating shaft is rotatably installed on the support plate. The first rotating shaft is perpendicular to the second rotating shaft, and bevel gears are fixedly installed at both ends. The two sets of bevel gears mesh. A gear is fixedly installed at the end of the first rotating shaft away from the second rotating shaft. The gear meshes with a gear ring fixedly installed on the rotating shaft of the second handwheel. The width of the gear ring is greater than that of the gear.

[0011] As a further embodiment of the present invention: an L-shaped cover plate is fixedly installed in the groove by fixing screws, the cover plate is in contact with the support plate and the fixing screws are connected to the support plate.

[0012] The beneficial effects of this invention are: (1) In this invention, the valve state can be adjusted by hydraulic and manual modes. It has both hydraulic fast drive and manual emergency drive functions. The hydraulic drive meets the requirements of automation, long distance and fast opening and closing. In extreme cases such as hydraulic failure, power failure and no power source, manual operation can be directly switched to ensure that the valve is controllable at any time, completely eliminating the safety blind spot caused by the single drive mode, and greatly improving the system safety redundancy.

[0013] (2) In this invention, when the valve is manually adjusted, the first hydraulic oil passage is sealed by the baffle and the retaining ring. At this time, external hydraulic oil is prevented from entering the hydraulic cylinder, ensuring that the hydraulic cylinder is in a closed state during the manual adjustment process. This avoids the sudden intervention of external hydraulic equipment to push the hydraulic piston to move, thereby preventing the first handwheel from turning randomly and causing injury to the staff, and further improving the safety of valve use. Attached Figure Description

[0014] The invention will now be further described with reference to the accompanying drawings.

[0015] Figure 1 This is the front view of the present invention.

[0016] Figure 2 This is a schematic diagram of the hydraulic cylinder in this invention.

[0017] Figure 3 This is a cross-sectional view of the hydraulic cylinder in this invention.

[0018] Figure 4 This is a schematic diagram of the structure of the hydraulic cylinder cover in this invention.

[0019] Figure 5 This is a schematic diagram of the cover plate in this invention.

[0020] Figure 6 yes Figure 3 Enlarged schematic diagram of point A1 in the middle.

[0021] Figure 7 yes Figure 3 Enlarged diagram of point A2 in the middle.

[0022] In the diagram: 1. Valve body; 2. Valve seat; 3. Valve plate; 4. Upper valve cover; 5. Lower valve cover; 6. Bearing housing; 7. Ball screw; 8. Adapter joint; 9. First handwheel; 10. Ball screw nut; 11. Lower valve stem; 12. Hydraulic cylinder; 13. Hydraulic cylinder upper cover; 14. Hydraulic cylinder lower cover; 15. Hydraulic piston; 16. Upper valve stem; 17. First hydraulic oil passage; 18. Return pipe; 19. Straight-through shut-off valve; 20. Second handwheel; 21. Gear ring; 22. Groove; 23. Support plate; 24. First rotating shaft; 25. Bevel gear; 26. Second rotating shaft; 27. Retaining ring; 28. Baffle; 29. ​​Limiting groove; 30. Cover plate; 31. Gear; 32. Second hydraulic oil passage. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1 As shown, this invention is an integrated manual-hydraulic high-pressure flat gate valve, comprising a valve body 1, a valve seat 2 fixedly installed inside the valve body 1, an upper valve cover 4 and a lower valve cover 5 fixedly connected to both sides of the valve body 1, a hydraulic cylinder 12 connected to the upper valve cover 4, an upper hydraulic cylinder cover 13 and a lower hydraulic cylinder cover 14 fixedly installed at both ends of the hydraulic cylinder 12 respectively, the lower hydraulic cylinder cover 14 being fixedly connected to the upper valve cover 4, and the upper and lower hydraulic cylinder covers 13 and 14 being connected by fixing screws, both the upper and lower hydraulic cylinder covers 13 and 14 having a first hydraulic oil passage 17 communicating with the internal area of ​​the hydraulic cylinder 12, the first hydraulic oil passage 17 being connected to external hydraulic equipment, a hydraulic piston 15 slidably installed inside the hydraulic cylinder 12, a return pipe 18 connecting the two sides of the hydraulic piston 15 fixedly connected to the hydraulic cylinder 12, a straight-through shut-off valve 19 fixedly installed on the return pipe 18, the straight-through... The shut-off valve 19 is equipped with a second handwheel 20 for opening and closing. The upper cover 13 and the lower cover 14 of the hydraulic cylinder are both provided with a second hydraulic oil passage 32 that communicates with the internal area of ​​the hydraulic cylinder 12. The two ends of the return pipe 18 are connected to the corresponding second hydraulic oil passage 32. An upper valve stem 16 is fixedly connected to the hydraulic piston 15. A valve plate 3 that cooperates with the valve seat 2 is fixedly installed at the end of the upper valve stem 16 away from the hydraulic piston 15. A bearing seat 6 is rotatably installed on the lower valve cover 5. A ball screw nut 10 is fixedly installed in the bearing seat 6. A conversion joint 8 is fixedly installed at the end of the bearing seat 6, and a first handwheel 9 is fixedly installed at the end of the conversion joint 8. A ball screw 7 located in the conversion joint 8 is rotatably connected in the ball screw nut 10. A lower valve stem 11 arranged coaxially is rotatably connected at the end of the ball screw 7. The lower valve stem 11 is fixedly connected to the valve plate 3.

[0025] In practical application, when the valve needs to be opened or closed, if the hydraulic equipment is in normal condition, the direct shut-off valve 19 is closed by the second handwheel 20. The external hydraulic equipment causes the hydraulic oil in the hydraulic cylinder 12 to flow through the first hydraulic oil passage 17, thereby pushing the hydraulic piston 15 to move up or down. The hydraulic piston 15 drives the valve plate 3 to move up and down in the valve seat 2 through the upper valve rod 16, thereby realizing the opening or closing of the valve. When the valve plate 3 moves up and down, it drives the ball screw 7 to move down through the lower valve rod 11. The downward movement of the ball screw 7 causes the ball screw nut 10 to rotate. At this time, the ball screw nut 10 drives the conversion joint 8 and the first handwheel 9 to rotate, ensuring that the valve plate 3 can move up and down smoothly. The valve seat 2 adopts a wave spring pre-tightening plus self-tightening sealing ring plus spacer ring positioning structure, which has sand prevention, erosion resistance, deformation resistance, and reliable bidirectional sealing. The valve can achieve long-term sealing under the highest ultra-high pressure rated working pressure of 210MPa, meeting the requirements of long-term ultra-high pressure service. When the hydraulic equipment is unavailable, the direct-connect valve 19 is opened via the second handwheel 20. The first handwheel 9 drives the ball screw nut 10 to rotate, causing the ball screw 7 to move up or down. This, in turn, causes the lower valve stem 11 to move the valve plate 3 up or down, thus opening or closing the valve. When the valve plate 3 is moved by the first handwheel 9, the hydraulic piston 15 moves synchronously under the action of the upper valve stem 16. As the hydraulic piston 15 moves, the hydraulic oil in the hydraulic cylinder 12 circulates through the return pipe 18, preventing any impact on the movement of the valve plate 3. The valve state can be adjusted through hydraulic and manual modes. It also has hydraulic rapid drive and manual emergency drive functions. The hydraulic drive meets the requirements of automation, long distance, and rapid opening and closing. In extreme cases such as hydraulic failure, power outage, or lack of power source, manual operation can be directly switched to ensure that the valve is always controllable, completely eliminating the safety blind spot caused by the single drive mode, and greatly improving the system's safety redundancy.

[0026] Please see Figures 1-7 As shown, the present invention is an integrated hand-hydraulic linkage ultra-high pressure flat gate valve. A groove 22 is provided on the upper cover 13 of the hydraulic cylinder. A second rotating shaft 26 is rotatably installed in the groove 22. The second rotating shaft 26 passes through the upper cover 13 of the hydraulic cylinder and is partially coaxial with the first hydraulic oil passage 17. The second rotating shaft 26 is slidably and sealingly connected to the hydraulic piston 15. A baffle 28 is provided on the second rotating shaft 26 for sealing the first hydraulic oil passage 17 on the upper cover 13 and the lower cover 14 of the hydraulic cylinder. The second rotating shaft 26 is rotatably connected to the second handwheel 20.

[0027] Specifically, a limiting groove 29 is provided at the end of the first hydraulic oil passage 17 that connects to the internal area of ​​the hydraulic cylinder 12. A baffle 28 is slidably installed in the limiting groove 29 and is threadedly connected to the second rotating shaft 26. A retaining ring 27 that cooperates with the baffle 28 is fixedly installed in the first hydraulic oil passage 17.

[0028] Specifically, a support plate 23 is fixedly installed in the groove 22, and a first rotating shaft 24 is rotatably installed on the support plate 23. The first rotating shaft 24 is perpendicular to the second rotating shaft 26, and bevel gears 25 are fixedly installed at both ends. The two sets of bevel gears 25 mesh. A gear 31 is fixedly installed at the end of the first rotating shaft 24 away from the second rotating shaft 26. The gear 31 meshes with a gear ring 21 fixedly installed on the rotating shaft of the second handwheel 20. The width of the gear ring 21 is greater than that of the gear 31.

[0029] Specifically, an L-shaped cover plate 30 is fixedly installed in the groove 22 by fixing screws. The cover plate 30 is in contact with the support plate 23 and the fixing screws are connected to the support plate 23.

[0030] In practical application, the cover plate 30 protects the groove 22. When manual adjustment of the valve opening or closing is required, the second handwheel 20 rotates, driving the first rotating shaft 24 to rotate via the meshing gear ring 21 and gear 31. The first rotating shaft 24 drives the second rotating shaft 26 to rotate via the meshing bevel gear 25. When the second rotating shaft 26 rotates, the baffle 28 moves closer to the retaining ring 27 under the drive of the thread. When the straight-through shut-off valve 19 is fully closed or opened, the baffle 28 contacts the retaining ring 27, and the baffle 28 moves closer to the retaining ring 27. The baffle 28 and the retaining ring 27 seal the first hydraulic oil passage 17, preventing external hydraulic oil from entering the hydraulic cylinder 12. Then, the valve state can be manually adjusted by the first handwheel 9. Subsequently, turning the second handwheel 20 in the opposite direction will separate the baffle 28 from the retaining ring 27, ensuring that the hydraulic cylinder 12 is in a closed state during manual adjustment. This prevents external hydraulic equipment from suddenly intervening and pushing the hydraulic piston 15 to move, thereby preventing the first handwheel 9 from turning arbitrarily and causing injury to the staff, and further improving the safety of valve use.

Claims

1. A hand-hydraulic integrated ultra-high pressure flat gate valve, comprising a valve body (1), characterized in that, A valve seat (2) is fixedly installed inside the valve body (1). An upper valve cover (4) and a lower valve cover (5) are fixedly connected to both sides of the valve body (1). A hydraulic cylinder (12) is connected to the upper valve cover (4). A hydraulic piston (15) is slidably installed inside the hydraulic cylinder (12). A return pipe (18) connecting the two sides of the hydraulic piston (15) is fixedly connected to the hydraulic cylinder (12). A straight-through shut-off valve (19) is fixedly installed on the return pipe (18). A second handwheel (20) for opening and closing is provided on the straight-through shut-off valve (19). An upper valve rod (16) is fixedly connected to the hydraulic piston (15). A valve plate (3) that works with a valve seat (2) is fixedly installed at the end away from the hydraulic piston (15). A bearing seat (6) is rotatably installed on the lower valve cover (5). A ball screw nut (10) is fixedly installed inside the bearing seat (6). A conversion joint (8) is fixedly installed at the end of the bearing seat (6), and a first handwheel (9) is fixedly installed at the end of the conversion joint (8). A ball screw (7) located inside the conversion joint (8) is rotatably connected inside the ball screw nut (10). A lower valve rod (11) arranged coaxially is rotatably connected at the end of the ball screw (7). The lower valve rod (11) is fixedly connected to the valve plate (3).

2. The integrated manual-hydraulic high-pressure flat gate valve according to claim 1, characterized in that, The hydraulic cylinder (12) is fixedly installed with a hydraulic cylinder upper cover (13) and a hydraulic cylinder lower cover (14) at both ends. The hydraulic cylinder lower cover (14) is fixedly connected to the upper valve cover (4). Both the hydraulic cylinder upper cover (13) and the hydraulic cylinder lower cover (14) are provided with a first hydraulic oil passage (17) that communicates with the internal area of ​​the hydraulic cylinder (12). The first hydraulic oil passage (17) is connected to external hydraulic equipment.

3. The integrated manual-hydraulic high-pressure flat gate valve according to claim 2, characterized in that, The upper cover (13) and lower cover (14) of the hydraulic cylinder are each provided with a second hydraulic oil passage (32) that communicates with the internal area of ​​the hydraulic cylinder (12), and the two ends of the return pipe (18) are connected to the corresponding second hydraulic oil passage (32).

4. The integrated manual-hydraulic high-pressure flat gate valve according to claim 2, characterized in that, The upper cover (13) of the hydraulic cylinder has a groove (22) and a second rotating shaft (26) is rotatably installed in the groove (22). The second rotating shaft (26) passes through the upper cover (13) of the hydraulic cylinder and is coaxially arranged with part of the first hydraulic oil passage (17). The second rotating shaft (26) is slidably sealed to the hydraulic piston (15). The second rotating shaft (26) is provided with a baffle (28) for sealing the first hydraulic oil passage (17) on the upper cover (13) and the lower cover (14) of the hydraulic cylinder. The second rotating shaft (26) is rotatably connected to the second handwheel (20).

5. The integrated manual-hydraulic high-pressure flat gate valve according to claim 4, characterized in that, A limiting groove (29) is provided at the end of the first hydraulic oil passage (17) that communicates with the internal area of ​​the hydraulic cylinder (12). A baffle (28) is slidably installed in the limiting groove (29) and the baffle (28) is threadedly connected to the second rotating shaft (26). A retaining ring (27) that cooperates with the baffle (28) is fixedly installed in the first hydraulic oil passage (17).

6. The integrated manual-hydraulic high-pressure flat gate valve according to claim 5, characterized in that, A support plate (23) is fixedly installed in the groove (22). A first rotating shaft (24) is rotatably installed on the support plate (23). The first rotating shaft (24) is perpendicular to the second rotating shaft (26), and both ends are fixedly installed with bevel gears (25). The two sets of bevel gears (25) mesh. A gear (31) is fixedly installed at the end of the first rotating shaft (24) away from the second rotating shaft (26). The gear (31) meshes with a gear ring (21) fixedly installed on the rotating shaft of the second handwheel (20). The width of the gear ring (21) is greater than that of the gear (31).

7. The integrated manual-hydraulic high-pressure flat gate valve according to claim 6, characterized in that, An L-shaped cover plate (30) is fixedly installed in the groove (22) by fixing screws. The cover plate (30) is in contact with the support plate (23) and the fixing screws are connected to the support plate (23).

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