A high pressure gate valve

Abstract

The application discloses a high-pressure gate valve, which comprises a shell, a flow cavity and a limiting cavity are arranged in the shell, a liquid inlet pipe and a liquid outlet pipe are arranged on the inner wall of the flow cavity, a plurality of layer sealing devices are arranged in the flow cavity, a trigger device is arranged in the limiting cavity, and the trigger device is connected with the plurality of layer sealing devices; the plurality of layer sealing devices are controlled to be opened or closed through the trigger device, so that the liquid in the liquid inlet pipe enters the flow cavity, and then the liquid outlet pipe leaves; and the sealing effect of the gate valve can be further improved through the arranged plurality of layer sealing devices.

Description

Technical Field

[0001] This invention relates to the field of gate valve technology, and more specifically, to a high-pressure gate valve. Background Technology

[0002] A gate valve is a valve that opens by lifting a barrier outside the fluid path. Gate valves require very little space along the pipe axis and hardly restrict fluid flow when the gate is fully open. Ordinary gate valves are driven by a threaded rod that connects an actuator to the gate. A handle is attached to the upper part of the threaded rod; turning the handle moves the gate up and down, thus opening or closing the valve. Most gate valves rely solely on the gate for sealing, resulting in a simple sealing structure and limited improvement in sealing performance. Therefore, it is necessary to propose a high-pressure gate valve to at least partially address the problems existing in the prior art. Summary of the Invention

[0003] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. The summary section of this invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0004] To at least partially solve the above problems, the present invention provides a high-pressure gate valve, comprising:

[0005] The housing has a flow cavity and a limiting cavity inside. The inner wall of the flow cavity is provided with an inlet pipe and an outlet pipe. The flow cavity is provided with a multi-layer sealing device. The limiting cavity is provided with a triggering device. The triggering device is connected to the multi-layer sealing device.

[0006] Preferably, the triggering device includes:

[0007] The limiting rods are arranged in parallel on the inner wall of the limiting cavity. A movable plate is sleeved on the limiting rods, and a multi-layer sealing device is provided at the bottom end of the movable plate.

[0008] A threaded sleeve, the bottom end of which is connected to the top end of a movable plate, and the top end of the threaded sleeve is provided with a threaded groove;

[0009] A lead screw, one end of which is threadedly connected to the threaded groove, and the other end of which passes through the housing and is connected to the rotating handle. The lead screw is rotatably connected to the housing.

[0010] Preferably, the multi-layer sealing device includes: a fixed plate, which is fixedly mounted on the inner wall of the flow cavity, and the fixed plate is provided with a flow hole; a trigger rod, one end of which is connected to the bottom end of the movable plate, the other end of which passes through the flow hole, and a sealing block is sleeved on the trigger rod, the sealing block being adapted to the flow hole;

[0011] A first sealing plate is rotatably mounted on the inner wall of a flow cavity. The first sealing plate is connected to the inlet pipe. A first hinge rod is hinged at one end to the first sealing plate and at the other end to a trigger rod.

[0012] The second sealing plate is rotatably mounted on the inner wall of the flow cavity. The second sealing plate is connected to the liquid outlet pipe. The second hinge rod is hinged at one end to the second sealing plate and at the other end to the trigger rod.

[0013] Preferably, the sealing block is a conical block, and the flow hole is a conical hole.

[0014] Preferably, the surface of the sealing block is provided with a rubber sleeve.

[0015] Preferably, the ends of the inlet pipe and the outlet pipe furthest from the housing are each provided with a connecting flange.

[0016] Preferably, the outlet pipe is inclined.

[0017] Preferably, both the side of the first sealing plate away from the first hinge rod and the side of the second sealing plate away from the second hinge rod are provided with rubber pads.

[0018] Preferably, a protective device is further provided between the threaded sleeve and the movable plate, the protective device comprising:

[0019] The first sleeve is located at the top of the movable plate, and a second sleeve is slidably connected inside the first sleeve. The bottom end of the threaded sleeve is slidably connected to the inner wall of the second sleeve.

[0020] A first spring is provided between the second sleeve and the movable plate.

[0021] Preferably, the protection device further includes protectors, with two adjacent protectors symmetrically arranged, the protectors comprising:

[0022] A first groove is provided on the outer wall of the second sleeve, and a second groove is provided on the inner wall of the first groove. A first locking block is slidably connected in the second groove, and a second spring is provided between the first locking block and the inner wall of the second groove. The end of the first locking block away from the second spring is arc-shaped.

[0023] A fixing block is disposed on the inner wall of the first sleeve, and the fixing block extends into the first groove;

[0024] A limiting groove is provided on the inner wall of the second sleeve, and a limiting block is slidably connected in the limiting groove. The limiting block is provided on the outer wall of the threaded sleeve.

[0025] The transmission cavity is located inside the second sleeve and above the first groove. A first rotating shaft is rotatably provided on the inner wall of the transmission cavity, and a transmission gear is sleeved on the first rotating shaft.

[0026] A transmission rod, one end of which is fixed to the top of a block for contact connection, and the other end of which extends into the transmission cavity to mesh with a transmission gear, and the transmission rod is slidably connected to the inner wall of the transmission cavity;

[0027] The third groove is located on the inner wall of the second sleeve. The second locking block is slidably connected in the third groove. A fourth spring is provided between the second locking block and the inner wall of the third groove. The outer wall of the threaded sleeve is provided with a locking block groove, which is adapted to the second locking block. The top of the second locking block meshes with a transmission gear.

[0028] A fixing tube is provided at the top of the movable plate and is located between the first sleeve and the limiting rod;

[0029] A U-shaped tube, one end of which is connected to the interior of the first sleeve, and the other end of which is connected to the fixed tube;

[0030] A push rod, which is slidably connected inside the fixed tube;

[0031] The mounting base is located on the movable plate, and a turntable is rotatably connected to the mounting base via a second rotating shaft.

[0032] A swing rod, one end of which is eccentrically connected to the turntable, and the other end of which is in contact with the top of the top rod;

[0033] The fourth groove, several of the fourth grooves are provided on the turntable, and a third locking block is slidably connected in the fourth groove. A third spring is provided between one end of the third locking block and the fourth groove, and the other end of the third locking block has a tapered structure. Several toothed grooves are evenly provided on the outer wall of the limiting rod.

[0034] Compared with the prior art, the present invention has at least the following beneficial effects:

[0035] The high-pressure gate valve of the present invention controls the opening or closing of the multi-layer sealing device through a triggering device, so that the liquid in the inlet pipe enters the flow chamber and then leaves through the outlet pipe. The multi-layer sealing device can further improve the sealing effect of the gate valve.

[0036] This invention relates to a high-pressure gate valve. Other advantages, objectives, and features of this invention will be apparent in part from the following description, and in part from what those skilled in the art will understand through study and practice of this invention. Attached Figure Description

[0037] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0038] Figure 1 This is a schematic diagram of the structure of a high-pressure gate valve according to the present invention;

[0039] Figure 2 This is a schematic diagram of the structure of a protection device for a high-pressure gate valve according to the present invention;

[0040] Figure 3 This is a schematic diagram of the structure of the rotary table of a high-pressure gate valve according to the present invention;

[0041] Figure 4 This invention relates to a high-pressure gate valve. Figure 2 Enlarged diagram of point A in the middle.

[0042] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Flow chamber; 3. Fixing plate; 4. Inlet pipe; 5. Outlet pipe; 6. Sealing block; 7. Triggering device; 8. Connecting flange; 9. Limiting rod; 10. Moving plate; 11. Flow hole; 12. Threaded sleeve; 13. Threaded groove; 14. Lead screw; 15. Rotating handle; 16. Triggering rod; 17. First hinge rod; 18. First sealing plate; 19. Second hinge rod; 20. Second sealing plate; 21. First sleeve; 22. U-shaped tube; 23. Fixing tube; 24. Push rod; 25. 26. Swing rod; 27. Turntable; 28. Mounting base; 29. ​​Third locking block; 30. Fourth groove; 31. Third spring; 32. Second rotating shaft; 33. First spring; 34. Second sleeve; 35. Limiting block; 36. Locking block groove; 37. Limiting groove; 38. First groove; 39. Fixing block; 40. Second groove; 41. Second spring; 43. Transmission rod; 44. Transmission cavity; 45. First rotating shaft; 46. Transmission gear; 47. Second locking block; 48. Third groove; 49. Fourth spring; 50. Limiting cavity. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0044] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0045] like Figures 1-4 As shown, the present invention provides a high-pressure gate valve, comprising:

[0046] The housing 1 has a flow chamber 2 and a limiting chamber 50 inside. The inner wall of the flow chamber 2 is provided with an inlet pipe 4 and an outlet pipe 5. The flow chamber 2 is provided with a multi-layer sealing device. The limiting chamber 50 is provided with a triggering device 7, which is connected to the multi-layer sealing device.

[0047] The working principle and beneficial effects of the above technical solution are as follows: In actual use, the multi-layer sealing device is opened or closed by the triggering device 7, so that the liquid in the inlet pipe 4 enters the flow chamber 2 and then leaves through the outlet pipe 5. The sealing effect of the gate valve can be further improved by the multi-layer sealing device.

[0048] In one embodiment, the triggering device 7 includes:

[0049] Limiting rod 9, two limiting rods 9 are arranged in parallel on the inner wall of the limiting cavity 50, a moving plate 10 is sleeved on the limiting rod 9, and a multi-layer sealing device is provided at the bottom end of the moving plate 10;

[0050] Threaded sleeve 12, the bottom end of which is connected to the top end of movable plate 10, and the top end of threaded sleeve 12 is provided with threaded groove 13;

[0051] A lead screw 14, one end of which is threadedly connected to the threaded groove 13, and the other end of which passes through the housing 1 and is connected to the rotating handle 15. The lead screw 14 is rotatably connected to the housing 1.

[0052] The working principle and beneficial effects of the above technical solution are as follows: By rotating the rotating handle 15, the lead screw 14 is rotated. During the rotation of the lead screw 14, the threaded electric sleeve 12 moves up and down, thereby driving the multi-layer sealing device to open or close.

[0053] In one embodiment, the multi-layer sealing device includes: a fixed plate 3, which is fixedly disposed on the inner wall of the flow cavity 2, and the fixed plate 3 is provided with a flow hole 11; a trigger rod 16, one end of which is connected to the bottom end of the movable plate 10, the other end of which passes through the flow hole 11, and a sealing block 6 is sleeved on the trigger rod 16, the sealing block 6 being adapted to the flow hole 11;

[0054] The first sealing plate 18 is rotatably provided on the inner wall of the flow cavity 2. The first sealing plate 18 is connected to the liquid inlet pipe 4. The first hinge rod 17 is hinged at one end to the first sealing plate 18 and at the other end to the trigger rod 16.

[0055] The second sealing plate 20 is rotatably mounted on the inner wall of the flow cavity 2. The second sealing plate 20 is connected to the liquid outlet pipe 5. The second hinge rod 19 is hinged at one end to the second sealing plate 20 and at the other end to the trigger rod 16.

[0056] The working principle and beneficial effects of the above technical solution are as follows: In actual use, when the gate valve needs to be opened, the triggering device drives the moving plate 10 to move upward, and the moving plate 10 drives the triggering rod 16 to move upward. During the movement, the triggering rod 16 drives the sealing block 6 to leave the flow hole 11. At the same time, the triggering rod 16 drives the first sealing plate 18 to rotate through the first hinge rod 17, so that the inlet pipe 4 is connected to the flow cavity 2. The triggering rod 16 drives the second sealing plate 20 to rotate through the second hinge rod 19, so that the outlet pipe 5 is connected to the flow cavity 2. The liquid flows from the inlet pipe 4 into the flow cavity 2 and then enters the outlet pipe 5 through the flow hole 11. The first sealing plate 18, the second sealing plate 20 and the sealing block 6 form a multi-layer seal in the liquid passage, which further improves the sealing performance of the gate valve.

[0057] In one embodiment, the sealing block 6 is a conical block, and the flow hole 11 is a conical hole;

[0058] The sealing block 6 has a rubber sleeve on its surface.

[0059] The working principle and beneficial effects of the above technical solution: The rubber sleeve can improve the sealing effect between the sealing block 6 and the flow hole 11.

[0060] In one embodiment, the ends of the inlet pipe 4 and the outlet pipe 5 that are furthest from the housing 1 are both provided with connecting flanges 8;

[0061] The outlet pipe 5 is set at an angle.

[0062] The working principle and beneficial effects of the above technical solution are as follows: The connecting flange 8 can facilitate the connection between the liquid inlet pipe 4 and the liquid outlet pipe 5, thereby improving installation efficiency.

[0063] In one embodiment, both the first sealing plate 18 on the side away from the first hinge rod 17 and the second sealing plate 20 on the side away from the second hinge rod 19 are provided with rubber pads.

[0064] The working principle and beneficial effects of the above technical solution: The rubber gasket can improve the sealing effect of the first sealing plate 18 and the second sealing plate 20.

[0065] In one embodiment, a protective device is further provided between the threaded sleeve 12 and the movable plate 10, the protective device comprising:

[0066] The first sleeve 21 is located at the top of the movable plate 10. The second sleeve 34 is slidably connected inside the first sleeve 21. The bottom end of the threaded sleeve 12 is slidably connected to the inner wall of the second sleeve 34.

[0067] A first spring 32 is provided between the second sleeve 34 and the movable plate 10;

[0068] The protective device further includes a protector, with two adjacent protectors symmetrically arranged. The protector includes:

[0069] The first groove 38 is provided on the outer wall of the second sleeve 34. The inner wall of the first groove 38 is provided with a second groove 40. The second groove 40 is slidably connected to a first locking block. A second spring 41 is provided between the first locking block and the inner wall of the second groove 40. The end of the first locking block away from the second spring 41 is arc-shaped.

[0070] Fixing block 39, which is disposed on the inner wall of the first sleeve 21 and extends into the first groove 38;

[0071] A limiting groove 37 is provided on the inner wall of the second sleeve 34, and a limiting block 35 is slidably connected in the limiting groove 37. The limiting block 35 is provided on the outer wall of the threaded sleeve 12.

[0072] The transmission cavity 44 is located inside the second sleeve 34 and above the first groove 38. A first rotating shaft 45 is rotatably provided on the inner wall of the transmission cavity 44, and a transmission gear 46 is sleeved on the first rotating shaft 45.

[0073] The transmission rod 43 has one end fixed to the top of the block 39 for contact connection, and the other end of the transmission rod 43 extends into the transmission cavity 44 to mesh with the transmission gear 46. The transmission rod 43 is slidably connected to the inner wall of the transmission cavity 44.

[0074] The third groove 48 is provided on the inner wall of the second sleeve 34. The second locking block 47 is slidably connected in the third groove 48. A fourth spring 49 is provided between the second locking block 47 and the inner wall of the third groove 48. The outer wall of the threaded sleeve 12 is provided with a locking block groove 36, which is adapted to the second locking block 47. The top of the second locking block 47 meshes with the transmission gear 46.

[0075] Fixed tube 23, the fixed tube 23 is provided at the top of the movable plate 10, and the fixed tube 23 is located between the first sleeve 21 and the limiting rod 9;

[0076] U-shaped tube 22, one end of which is connected to the interior of the first sleeve 21, and the other end of which is connected to the fixed tube 23;

[0077] Top rod 24, which is slidably connected inside the fixed tube 23;

[0078] Mounting base 27 is mounted on the movable plate 10, and a turntable 26 is rotatably connected to the mounting base 27 via a second rotating shaft 31.

[0079] A swing rod 25, one end of which is eccentrically connected to a turntable 26, and the other end of which is in contact with the top end of a top rod 24;

[0080] The fourth groove 29 is provided on the turntable 26. A third locking block 28 is slidably connected in the fourth groove 29. A third spring 30 is provided between one end of the third locking block 28 and the fourth groove 29. The other end of the third locking block 28 has a conical structure. A number of toothed grooves are evenly provided on the outer wall of the limiting rod 9.

[0081] The working principle and beneficial effects of the above technical solution are as follows: In actual use, when the gate valve needs to be closed, the threaded sleeve 12 drives the moving plate 10 to move downward through the protection device. During the downward movement, the resistance force on the moving plate 10 continuously increases, and the greater the pressure of the liquid in the inlet pipe 4, the greater the resistance force. When the resistance force exceeds the preset value, the second sleeve 34 and the first sleeve 21 will slide relative to each other, causing the fixing block 39 to push the first locking block into the second groove 40. At the same time, the fixing block 39 causes the transmission rod 43 to move towards the transmission cavity 44, so that the transmission rod 43 drives the second locking block 47 to move in the compression direction of the fourth spring 49 through the transmission gear 46, causing the second locking block to exit the slot 36, causing the threaded sleeve 12 and the second sleeve 34 to slide relative to each other, so that the threaded sleeve 12 interrupts the control of the multi-layer sealing device, avoiding excessive pressure between the screw 14 and the threaded sleeve 12, which could lead to screw damage, and improving the screw's performance. Service life; when continued sealing is required, the screw 14 is rotated to make the threaded sleeve 12 continue to move downward. During the downward movement of the threaded sleeve 12, the gas in the first sleeve 21 is continuously compressed, allowing the gas to enter the U-shaped tube 22 and lift the push rod 24. During the lifting process, the push rod 24 drives the turntable 26 to rotate through the swing rod 25, causing the third locking block 28 to rotate. In conjunction with the toothed groove on the limit rod, the moving plate 10 moves downward to continue sealing. During the sealing process, the swing rod 25 acts as a lever, and the leverage force can quickly complete the sealing of high-pressure liquid in the gate valve, improving efficiency. At the same time, after sealing is completed, if the liquid in the inlet pipe 4 suddenly becomes too high, the excessively high pressure liquid will cause the limit plate 10 to move upward, further compressing the gas in the first sleeve 21, causing the gate valve to open and release some pressure, avoiding excessive pressure in the inlet pipe 4 that could lead to pipe burst, thus improving the safety performance of the gate valve.

[0082] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0083] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0084] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A high pressure gate valve characterized by, The utility model relates to a multi-layer sealing device for liquid flow cavity, and belongs to the field of liquid flow cavity sealing device. The utility model discloses a multi-layer sealing device for liquid flow cavity, which comprises a shell (1), a flow cavity (2) and a limiting cavity (50) are arranged in the shell (1), a liquid inlet pipe (4) and a liquid outlet pipe (5) are arranged on the inner wall of the flow cavity (2), a plurality of layer sealing devices are arranged in the flow cavity (2), a trigger device (7) is arranged in the limiting cavity (50), and the trigger device (7) is connected with the plurality of layer sealing devices. The trigger device (7) comprises: A limiting rod (9) is arranged in parallel on the inner wall of the limiting cavity (50), a moving plate (10) is sleeved on the limiting rod (9), and the moving plate (10) is provided with the plurality of layer sealing devices at the bottom end. A threaded sleeve (12) is connected between the moving plate (10) and the threaded sleeve (12), and a threaded groove (13) is arranged at the top end of the threaded sleeve (12). One end of a lead screw (14) is connected with the threaded groove (13) through a threaded connection, the other end of the lead screw (14) penetrates through the shell (1) and is connected with a rotating handle (15), and the lead screw (14) is rotatably connected with the shell (1). The plurality of layer sealing devices comprise a fixed plate (3), the fixed plate (3) is fixedly arranged on the inner wall of the flow cavity (2), and the fixed plate (3) is provided with a flow hole (11); one end of a trigger rod (16) is connected with the bottom end of the moving plate (10), the other end of the trigger rod (16) penetrates through the flow hole (11), a sealing block (6) is sleeved on the trigger rod (16), and the sealing block (6) is matched with the flow hole (11); a first sealing plate (18) is rotatably arranged on the inner wall of the flow cavity (2), the first sealing plate (18) is connected close to the liquid inlet pipe (4), one end of a first hinged rod (17) is hingedly connected with the first sealing plate (18), and the other end of the first hinged rod (17) is hingedly connected with the trigger rod (16); a second sealing plate (20) is rotatably arranged on the inner wall of the flow cavity (2), the second sealing plate (20) is connected close to the liquid outlet pipe (5), one end of a second hinged rod (19) is hingedly connected with the second sealing plate (20), and the other end of the second hinged rod (19) is hingedly connected with the trigger rod (16). A protection device is further arranged between the threaded sleeve (12) and the moving plate (10), and the protection device comprises: A first sleeve (21) is arranged at the top end of the moving plate (10), a second sleeve (34) is slidably connected in the first sleeve (21), and the bottom end of the threaded sleeve (12) is slidably connected to the inner wall of the second sleeve (34); A first spring (32) is arranged between the second sleeve (34) and the moving plate (10). The protection device further comprises a protector, and adjacent two protectors are symmetrically arranged, and the protector comprises: ​ ​ A first recess (38) is arranged on the outer wall of the second sleeve (34), and an inner wall of the first recess (38) is provided with a second recess (40), a first clamping block is slidably connected in the second recess (40), a second spring (41) is arranged between the first clamping block and the inner wall of the second recess (40), and an end of the first clamping block away from the second spring (41) is arc-shaped; A fixing block (39) is arranged on the inner wall of the first sleeve (21) and extends into the first recess (38); A limiting groove (37) is arranged on the inner wall of the second sleeve (34), and a limiting block (35) is slidably connected in the limiting groove (37); the limiting block (35) is arranged on the outer wall of the threaded sleeve (12); A transmission cavity (44) is arranged in the second sleeve (34), the transmission cavity (44) is located above the first recess (38), a first rotating shaft (45) is rotatably arranged on the inner wall of the transmission cavity (44), and a transmission gear (46) is sleeved on the first rotating shaft (45); One end of a transmission rod (43) is in contact with the top end of the fixing block (39), the other end of the transmission rod (43) extends into the transmission cavity (44) and is engaged with the transmission gear (46), and the transmission rod (43) is slidably connected with the inner wall of the transmission cavity (44); A third recess (48) is arranged on the inner wall of the second sleeve (34), a second clamping block (47) is slidably connected in the third recess (48), a fourth spring (49) is arranged between the second clamping block (47) and the inner wall of the third recess (48), a clamping block groove (36) is arranged on the outer wall of the threaded sleeve (12), the clamping block groove (36) is matched with the second clamping block (47), and the top end of the second clamping block (47) is engaged with the transmission gear (46); A fixing tube (23) is arranged at the top end of the moving plate (10) and located between the first sleeve (21) and the limiting rod (9); A U-shaped tube (22) is in communication with the inside of the first sleeve (21) at one end and in communication with the fixing tube (23) at the other end; A jacking rod (24) is slidably connected in the fixing tube (23); An installation seat (27) is arranged on the moving plate (10), and a rotating disc (26) is rotatably connected to the installation seat (27) through a second rotating shaft (31); An oscillating rod (25) is eccentrically connected to the rotating disc (26) at one end and in contact with the top end of the jacking rod (24) at the other end; and An oscillating rod (25) is eccentrically connected to the rotating disc (26) at one end and in contact with the top end of the jacking rod (24) at the other end. Fourth recess (29), a plurality of fourth recess (29) is established in rotating disc (26), third clamping block (28) is connected with in fourth recess (29) and slides, third spring (30) is established between one end of third clamping block (28) and fourth recess (29), the other end of third clamping block (28) conical structure, the outer wall of limiting rod (9) is evenly provided with a plurality of gear grooves.

2. The high-pressure gate valve according to claim 1, wherein The sealing block (6) is a conical block, and the flow-through hole (11) is a conical hole.

3. The high-pressure gate valve according to claim 1, wherein The surface of the sealing block (6) is provided with a rubber sleeve.

4. The high-pressure gate valve according to claim 1, wherein The end of the liquid inlet pipe (4) and the liquid outlet pipe (5) away from the shell (1) is provided with a connecting flange (8).

5. The high-pressure gate valve according to claim 1, wherein The liquid outlet pipe (5) is arranged obliquely.

6. The high-pressure gate valve according to claim 1, wherein The first sealing plate (18) away from the first hinged rod (17) side and the second sealing plate (20) away from the second hinged rod (19) side are provided with rubber pads.

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