Corrosion-resistant high-sealing-performance flat gate valve

Abstract

The invention discloses a corrosion-resistant high-sealing-performance flat gate valve, which relates to the field of valves, and comprises a valve body pipeline, and the bottom end of a movable sleeve block is provided with a displacement blocking piece positioned on the inner side. Through arrangement of a displacement blocking piece, when a movable sleeve block pushes a guide rod to move through a supporting frame and a straight groove frame, a gate plate frame moves downwards along with the movable sleeve block, and when a limiting column at the bottom of the gate plate frame makes contact with the bottom of the inner wall of a connecting base, the guide rod moves relative to a sleeve; in the process, a straight groove frame extrudes an extrusion connecting pin to enable a swing plate to swing relative to a partition plate, a lead screw moves relative to a threaded sleeve through swing of the swing plate, and therefore a sealing side plate moves in the direction away from a gate plate frame. In this way, the sealing side plate can block the valve body pipeline through the sealing ring, so that the friction force borne by the sealing ring is reduced, the service life of the sealing ring is prolonged, and the sealing performance of the valve is further improved.

Description

Technical Field

[0001] The invention relates to the field of valves, in particular to a corrosion-resistant high-sealing flat gate valve. Background Art

[0002] The flat gate valve is a sliding valve with a parallel gate as the closing part. Because the flat gate valve has the advantages of high sealing performance, flow resistance and channel, safety and stability, adaptability and durability, and easy operation, it is widely used in pipeline systems in the petroleum, natural gas, chemical, electric power and other industries, mainly used to control the flow and cutoff of fluids.

[0003] However, since the flat gate valve moves in the vertical direction, friction will occur between the valve body and the gate valve during movement. Therefore, the staff needs to replace the sealing gasket in the flat gate valve regularly, which not only shortens the maintenance cycle, but also the friction between the sealing gasket in the gate valve and the inner wall of the valve body will affect the smoothness of the gate movement. Summary of the invention

[0004] The purpose of the present invention is to provide a corrosion-resistant and highly sealing flat gate valve in order to solve the problem that the sealing gasket is easily damaged during the use of the flat gate valve.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a corrosion-resistant and highly sealing flat gate valve, comprising a valve body pipeline, a connecting seat is installed on the valve body pipeline, a valve body is installed on the top of the connecting seat, an adjusting screw is arranged on the inner side of the valve body, a movable sleeve block extending to the inside of the connecting seat is sleeved on the adjusting screw, a gate frame located on the inner side of the connecting seat is inserted into the bottom end of the movable sleeve block, a shift blocking piece located on the inner side is arranged at the bottom end of the movable sleeve block, the movable sleeve block is connected to sealing side plates located on both sides of the gate frame through the shift blocking piece, a sealing ring is installed on the side of the sealing side plate away from the gate frame, a conical block is arranged on the inner side of the sealing ring, a limiting column is arranged at the bottom of the gate frame, and a sealing detection piece located on one side of the limiting column is arranged at the bottom of the gate frame.

[0006] As a further solution of the present invention: the shift blocking member includes a support frame installed at the bottom end of the movable sleeve block and located on the inner side of the gate frame, a straight groove frame is installed at the bottom end of the support frame, the inner side of the straight groove frame is slidably connected with an extrusion connecting pin, both ends of the extrusion connecting pin are rotatably connected with a swing plate through bearings, the inner wall of the gate frame is installed with partitions located on both sides of the straight groove frame, the partition is rotatably connected with a screw connected to the swing plate through bearings, a threaded sleeve is installed on the side of the sealing side plate away from the sealing ring, the threaded sleeve is sleeved on the outside of the screw, a guide rod is installed at the bottom of the straight groove frame, a sleeve located on the outside of the guide rod is installed at the bottom of the inner wall of the gate frame, and the bottom end of the guide rod is provided with a first return spring connected to the sleeve.

[0007] As a further solution of the present invention: the number of the screw rods is two, and the two screw rods are symmetrically arranged along the vertical center axis of the partition.

[0008] As a further solution of the present invention: the inner width of the straight slot frame is equal to the diameter of the extruded connecting pin, and the horizontal height of the extruded connecting pin is greater than the horizontal height of the screw rod.

[0009] As a further solution of the present invention: the sealing detection component includes a detection chamber installed at the bottom of the gate frame and located on one side of the limit column, the detection chamber is slidably connected with a flow blocker, one side of the flow blocker is provided with a plug located on the inner side of the detection chamber, the end of the plugger away from the flow blocker is provided with a first contact piece, the plugger is provided with a push plate slidably connected to the detection chamber, the plugger is provided with a card hole, the inner wall of the detection chamber is installed with a connecting rod, one end of the connecting rod is provided with a second contact piece flush with the first contact piece, and the push plate is away from the flow blocker. A second return spring connected to the inner wall of the detection chamber is provided on one side of the baffle, a pressure rod located on one side of the guide rod is installed at the bottom of the straight groove frame, a movable frame extending to the inner side of the gate frame is inserted into the inner side of the detection chamber, a push pin located below the insertion rod is installed on the inner side of the movable frame, a movable locking pin extending to the inner side of the locking hole is sleeved on the push pin, a third return spring connected to the movable frame and located on the outside of the push pin is provided at the bottom of the movable locking pin, a battery is installed on the top of the valve body, and a buzzer is installed on the top of the battery.

[0010] As a further solution of the present invention: the diameters of the locking hole and the movable locking pin are equal, and the inner width of the movable frame is greater than the diameter of the insertion rod.

[0011] As a further solution of the present invention: the second contact piece is electrically connected to the battery through a wire, and the first contact piece is electrically connected to the buzzer through a wire.

[0012] As a further solution of the present invention: the end of the detection chamber away from the connecting rod is open, and the baffle is in contact with the inner wall of one end of the detection chamber.

[0013] As a further solution of the present invention: the tip of the conical block faces the valve body pipe, the maximum diameter of the conical block is smaller than the inner wall diameter of the valve body pipe, and the height of the conical block is smaller than the maximum moving distance of the sealing side plate.

[0014] As a further solution of the present invention: a ball is provided at one end of the movable latch away from the push pin, and the distance between the first contact piece and the second contact piece is smaller than the shortest distance between the baffle plug and the push pin.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting a displacement blocking member, when the movable sleeve pushes the guide rod to move through the support frame and the straight groove frame, the gate frame moves downward with the movable sleeve. When the limit column at the bottom of the gate frame contacts the bottom of the inner wall of the connecting seat, the guide rod will move relative to the sleeve. In this process, the straight groove frame squeezes the extrusion pin to make the swing plate swing relative to the partition plate, and the swing of the swing plate moves the screw rod relative to the threaded sleeve, so that the sealing side plate moves away from the gate frame. In this way, the sealing side plate can block the valve body pipeline through the sealing ring, thereby reducing the friction force on the sealing ring, extending the service life of the sealing ring, and further improving the sealing performance of the valve; 2. By setting the sealing detection part, when the gate frame does not block the valve body pipeline, the active bayonet is located on the inner side of the bayonet hole. At this time, when the solution passing through the valve body pipeline impacts the flow block, the flow block cannot move relative to the detection chamber. When the gate frame and the sealing side plate block the valve body pipeline, the pressure rod pushes the moving frame to move as the straight groove frame moves downward, so that the push pin moves with the moving frame. When the sealing side plate completely blocks the valve body pipeline, the active bayonet pin and the bayonet hole are completely When the valve body is fully separated, the choke has room to move. When a gap appears at the connection between the valve body pipeline and the sealing side plate, the solution will enter the connecting seat. At this time, the solution is continuously injected into the connecting seat to make the choke move toward the connecting rod, so that the plug rod drives the first contact piece to move. At the same time, the second return spring contracts due to the squeezing of the push plate, so that the second contact piece contacts the first contact piece. The contact between the second contact piece and the first contact piece makes the buzzer energized and operated, so that the staff can maintain the valve in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the connecting socket of the present invention; Figure 3 It is a schematic diagram of the internal structure of the gate frame of the present invention; Figure 4 It is a schematic diagram of the connection between the sealing side plate and the straight groove frame of the present invention; Figure 5 It is a schematic diagram of the connection between the straight slot frame and the swing plate of the present invention; Figure 6 It is a schematic diagram of the connection between the detection chamber and the pressure rod of the present invention; Figure 7 It is a schematic diagram of the internal structure of the detection chamber of the present invention; Figure 8 It is a schematic diagram of the connection between the sealing side plate and the partition plate of the present invention.

[0017] In the figure: 1. valve body pipeline; 2. connecting seat; 3. valve body; 4. adjusting screw rod; 5. movable sleeve block; 6. gate frame; 7. limiting column; 8. sealing side plate; 9. supporting frame; 10. extrusion connecting pin; 11. straight groove frame; 12. swing plate; 13. guide rod; 14. partition; 15. sleeve; 16. movable frame; 17. detection chamber; 18. pressure rod; 19. tapered block; 20. screw rod; 21. sealing ring; 22. threaded sleeve; 23. first return spring; 24. choke; 25. plug rod; 26. card hole; 27. movable card pin; 28. first contact piece; 29. ​​second contact piece; 30. connecting rod; 31. second return spring; 32. push plate; 33. push pin; 34. third return spring; 35. battery; 36. buzzer. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of an embodiment of the present invention based on the overall structure of the present invention.

[0020] See also Figures 1 to 8 In an embodiment of the present invention, a corrosion-resistant high-sealing flat gate valve includes a valve body pipeline 1, a connecting seat 2 is installed on the valve body pipeline 1, a valve body 3 is installed on the top of the connecting seat 2, an adjusting screw rod 4 is arranged on the inner side of the valve body 3, a movable sleeve block 5 extending to the inside of the connecting seat 2 is sleeved on the adjusting screw rod 4, a gate frame 6 located on the inner side of the connecting seat 2 is inserted at the bottom end of the movable sleeve block 5, a shift blocking member located on the inner side is arranged at the bottom end of the movable sleeve block 5, and the movable sleeve block 5 is connected to sealing side plates 8 located on both sides of the gate frame 6 through the shift blocking member, a sealing ring 21 is installed on the side of the sealing side plate 8 away from the gate frame 6, a conical block 19 is arranged on the inner side of the sealing ring 21, a limiting column 7 is arranged at the bottom of the gate frame 6, and a sealing detection member located on one side of the limiting column 7 is arranged at the bottom of the gate frame 6.

[0021] In this embodiment, the movable sleeve 5 is moved upward along the adjusting screw rod 4 by operating the rotary wheel on the valve body 3. During this process, the sealing side plate 8 is first moved toward the inner side of the gate frame 6 through the operation of the shift blocking member, so that the sealing ring 21 is separated from the valve body pipeline 1. Then, the movable sleeve 5 continues to move upward along the adjusting screw rod 4 to make the gate frame 6 drive the sealing side plate 8 to move upward, so that the valve body pipeline 1 loses its obstruction, thereby achieving the valve opening effect. Similarly, the sealing side plate 8 is brought into contact with the valve body pipeline 1 and blocks the valve body pipeline 1 by rotating the rotary wheel on the valve body 3 in the opposite direction. When the sealing side plate 8 blocks and seals the valve body pipeline 1, the sealing detection member is used to detect the sealing of the connection between the sealing side plate 8 and the valve body pipeline 1.

[0022] Please refer to Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 8 The shift blocking member includes a support frame 9 installed at the bottom end of the movable sleeve block 5 and located on the inner side of the gate frame 6, a straight groove frame 11 is installed at the bottom end of the support frame 9, and an extrusion connecting pin 10 is slidably connected to the inner side of the straight groove frame 11, and the two ends of the extrusion connecting pin 10 are rotatably connected to the swing plate 12 through bearings, and the inner wall of the gate frame 6 is installed with a partition 14 located on both sides of the straight groove frame 11, and a screw rod 20 connected to the swing plate 12 is rotatably connected on the partition 14 through a bearing, and a threaded sleeve 22 is installed on the side of the sealing side plate 8 away from the sealing ring 21, and the threaded sleeve 22 is sleeved on the outer side of the screw rod 20, a guide rod 13 is installed at the bottom of the straight groove frame 11, and a sleeve 15 located on the outer side of the guide rod 13 is installed at the bottom of the inner wall of the gate frame 6, and a first return spring 23 connected to the sleeve 15 is provided at the bottom of the guide rod 13.

[0023] In this embodiment, when closing the valve, first rotate the wheel on the valve body 3 to move the movable sleeve 5 downward along the adjusting screw rod 4. At this time, the movable sleeve 5 pushes the guide rod 13 to move through the support frame 9 and the straight groove frame 11. At this time, the guide rod 13 pushes the sleeve 15 downward through the first return spring 23, so that the gate frame 6 moves downward with the movable sleeve 5. When the limit column 7 at the bottom of the gate frame 6 contacts the bottom of the inner wall of the connecting seat 2, the movable sleeve 5 continues to move downward, so that the guide rod 13 can squeeze the first return spring 23, so that the guide rod 13 moves relative to the sleeve 15. In this process, the straight groove frame 11 squeezes the extrusion pin 10 to make the swing plate 12 swing relative to the partition plate 14, and the swing of the swing plate 12 makes the screw rod 20 swing relative to the partition plate 14. The threaded sleeve 22 moves, so that the sealing side plate 8 moves in the direction away from the gate frame 6, so that the sealing side plate 8 can block the valve body pipeline 1 through the sealing ring 21, thereby reducing the friction force on the sealing ring 21, extending the service life of the sealing ring 21, and further improving the sealing performance of the valve. When opening the valve, the wheel on the valve body 3 is rotated in the opposite direction to make the movable sleeve 5 move up along the adjusting screw rod 4. At this time, the guide rod 13 first moves up relative to the sleeve 15 under the action of the elastic restoring force of the first return spring 23. In this process, the sealing side plate 8 will move into the inner side of the gate frame 6. Then, continuing to rotate the wheel on the valve body 3 can make the guide rod 13 drive the sleeve 15 to move up synchronously, so that the gate frame 6 loses its obstruction to the valve body pipeline 1.

[0024] Please refer to Figure 8 There are two screw rods 20 , and the two screw rods 20 are symmetrically arranged along the vertical center axis of the partition 14 .

[0025] In this embodiment, this structure is provided to allow the two screw rods 20 to limit the sealing side plates 8, thereby preventing the sealing side plates 8 from rotating relative to the gate frame 6 when the screw rods 20 rotate.

[0026] Please refer to Figure 5 The inner width of the straight groove frame 11 is equal to the diameter of the extruded connecting pin 10 , and the horizontal height of the extruded connecting pin 10 is greater than the horizontal height of the screw rod 20 .

[0027] In this embodiment, the swing plate 12 is set to swing relative to the partition plate 14 when the straight groove frame 11 moves downward, thereby forming a force-saving lever effect between the extrusion connecting pin 10 and the screw rod 20, further improving the smoothness of the movement of the sealing side plate 8 relative to the gate frame 6.

[0028] Please refer to Figure 2 , Figure 3 , Figure 6 , Figure 7 The sealing detection member includes a detection chamber 17 installed at the bottom of the gate frame 6 and located on one side of the limit column 7. The detection chamber 17 is slidably connected with a flow blocker 24. A plug rod 25 located on the inner side of the detection chamber 17 is provided on one side of the flow blocker 24. A first contact piece 28 is installed on the end of the plug rod 25 away from the flow blocker 24. A push plate 32 slidably connected to the detection chamber 17 is provided on the plug rod 25. A card hole 26 is opened on the plug rod 25. A connecting rod 30 is installed on the inner wall of the detection chamber 17. A second contact piece 29 flush with the first contact piece 28 is installed on one end of the connecting rod 30. The push plate 32 is provided on the side away from the flow blocker 24. A second return spring 31 connected to the inner wall of the detection chamber 17 is provided, a pressure rod 18 located on one side of the guide rod 13 is installed at the bottom of the straight groove frame 11, a movable frame 16 extending to the inner side of the gate frame 6 is inserted into the inner side of the detection chamber 17, a push pin 33 located below the insertion rod 25 is installed on the inner side of the movable frame 16, a movable latch 27 extending to the inner side of the latch hole 26 is sleeved on the push pin 33, a third return spring 34 connected to the movable frame 16 and located on the outer side of the push pin 33 is provided at the bottom of the movable latch 27, a battery 35 is installed on the top of the valve body 3, and a buzzer 36 is installed on the top of the battery 35.

[0029] In this embodiment, when the gate frame 6 does not block the valve body pipeline 1, the active bayonet 27 is located on the inner side of the bayonet hole 26. At this time, when the solution passing through the valve body pipeline 1 impacts the baffle 24, the baffle 24 cannot move relative to the detection chamber 17. When the gate frame 6 and the sealing side plate 8 block the valve body pipeline 1, the pressure rod 18 pushes the moving frame 16 to move as the straight groove frame 11 moves downward, so that the push pin 33 moves with the moving frame 16 moving downward, and when the sealing side plate 8 completely blocks the valve body pipeline 1, the active bayonet 27 and the bayonet hole 26 are in contact with each other. When the valve body pipe 1 and the sealing side plate 8 are completely separated, the flow blocking plug 24 has space to move. When a gap appears at the connection between the valve body pipeline 1 and the sealing side plate 8, the solution will enter the connecting seat 2. At this time, the solution is continuously injected into the connecting seat 2 to make the flow blocking plug 24 move toward the connecting rod 30, so that the insertion rod 25 drives the first contact piece 28 to move. At the same time, the second return spring 31 contracts due to the squeezing of the push plate 32, so that the second contact piece 29 contacts the first contact piece 28. The contact between the second contact piece 29 and the first contact piece 28 makes the buzzer 36 energized and operated, so that the staff can maintain the valve in time.

[0030] Please refer to Figure 7 The diameters of the card hole 26 and the movable card pin 27 are equal, and the inner width of the movable frame 16 is greater than the diameter of the insertion rod 25.

[0031] In this embodiment, this structure is provided to prevent the insertion rod 25 from rubbing against the moving frame 16 when moving, and also improves the stability of the insertion rod 25 after the movable latch 27 is inserted into the latch hole 26.

[0032] Please refer to Figure 1 , Figure 2 , Figure 7 The second contact piece 29 is electrically connected to the battery 35 through a wire, and the first contact piece 28 is electrically connected to the buzzer 36 through a wire.

[0033] In this embodiment, by providing this structure, the buzzer 36 is powered on and operates when the first contact piece 28 and the second contact piece 29 are in contact, so that the operation timing of the buzzer 36 can be accurately controlled.

[0034] Please refer to Figure 7 The end of the detection chamber 17 away from the connecting rod 30 is open, and the baffle 24 is in contact with the inner wall of one end of the detection chamber 17.

[0035] In this embodiment, this structure is provided to improve the shielding effect of the baffle 24 on the interior of the detection chamber 17 , and at the same time, the impact force of the solution can only act on the baffle 24 .

[0036] Please refer to Figure 2, Figure 3 , Figure 4 The tip of the conical block 19 faces the valve body pipeline 1 , the maximum diameter of the conical block 19 is smaller than the inner wall diameter of the valve body pipeline 1 , and the height of the conical block 19 is smaller than the maximum moving distance of the sealing side plate 8 .

[0037] In this embodiment, this structure is provided to guide the solution entering the connecting seat 2 , thereby reducing the impact force of the solution inside the valve body pipeline 1 on the sealing side plate 8 .

[0038] Please refer to Figure 8 A ball is provided at one end of the movable latch 27 away from the push pin 33 , and the distance between the first contact piece 28 and the second contact piece 29 is smaller than the shortest distance between the baffle 24 and the push pin 33 .

[0039] In the present embodiment, this structure is provided to prevent the push pin 33 from hindering the movement of the choke plug 24 .

[0040] The working principle of the present invention is as follows: when the gate frame 6 does not block the valve body pipeline 1, the movable latch 27 is located on the inner side of the latch hole 26. At this time, when the solution passing through the valve body pipeline 1 impacts the flow block 24, the flow block 24 cannot move relative to the detection chamber 17. When the valve is closed, the rotating wheel on the valve body 3 is first rotated to move the movable sleeve 5 along the adjusting screw rod 4. At this time, the movable sleeve 5 pushes the guide rod 13 to move through the support frame 9 and the straight groove frame 11. At this time, the guide rod 13 is reset by the first reset The spring 23 pushes the sleeve 15 to move downward, so that the gate frame 6 moves downward with the movable sleeve block 5. When the limit column 7 at the bottom of the gate frame 6 contacts the bottom of the inner wall of the connecting seat 2, the movable sleeve block 5 continues to move downward, so that the guide rod 13 can squeeze the first return spring 23, so that the guide rod 13 moves relative to the sleeve 15. In this process, the straight groove frame 11 squeezes the extrusion connecting pin 10 to make the swing plate 12 swing relative to the partition plate 14, and the swing of the swing plate 12 makes the screw rod 20 The relative threaded sleeve 22 moves, so that the sealing side plate 8 moves in the direction away from the gate frame 6, so that the sealing side plate 8 can seal the valve body pipeline 1 through the sealing ring 21, thereby reducing the friction force on the sealing ring 21, extending the service life of the sealing ring 21, and further improving the sealing performance of the valve. When the sealing side plate 8 completely seals the valve body pipeline 1, the movable bayonet 27 is completely separated from the bayonet hole 26, and the flow blocking plug 24 has a movable space. When the valve body pipeline 1 and the sealing side plate 8 are completely sealed, the movable bayonet 27 is completely separated from the bayonet hole 26, and the flow blocking plug 24 has a movable space. When a gap appears at the connection of the plate 8, the solution will enter the connecting seat 2. At this time, the solution is continuously injected into the connecting seat 2 to make the flow blocking plug 24 move toward the connecting rod 30, so that the insertion rod 25 drives the first contact piece 28 to move. At the same time, the second return spring 31 contracts due to the squeezing of the push plate 32, so that the second contact piece 29 contacts the first contact piece 28. The contact between the second contact piece 29 and the first contact piece 28 makes the buzzer 36 energized and operated, so that the staff can maintain the valve in time.

[0041] What has been described above are only preferred specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A corrosion-resistant high-sealing flat gate valve, comprising a valve body pipeline (1), characterized in that: A connecting seat (2) is installed on the valve body pipeline (1), a valve body (3) is installed on the top of the connecting seat (2), an adjusting screw rod (4) is arranged on the inner side of the valve body (3), a movable sleeve block (5) extending into the interior of the connecting seat (2) is sleeved on the adjusting screw rod (4), a gate frame (6) located on the inner side of the connecting seat (2) is inserted at the bottom end of the movable sleeve block (5), a shift blocking member located on the inner side is arranged at the bottom end of the movable sleeve block (5), the movable sleeve block (5) is connected to sealing side plates (8) located on both sides of the gate frame (6) through the shift blocking member, a sealing ring (21) is installed on the side of the sealing side plate (8) away from the gate frame (6), a conical block (19) is arranged on the inner side of the sealing ring (21), a limiting column (7) is arranged at the bottom of the gate frame (6), and a sealing detection member located on one side of the limiting column (7) is arranged at the bottom of the gate frame (6).

2. A corrosion-resistant high-sealing flat gate valve according to claim 1, characterized in that: The displacement blocking member comprises a support frame (9) mounted on the bottom end of the movable sleeve (5) and located inside the gate frame (6); a straight groove frame (11) is mounted on the bottom end of the support frame (9); an extrusion connecting pin (10) is slidably connected to the inside of the straight groove frame (11); both ends of the extrusion connecting pin (10) are rotatably connected to a swing plate (12) via bearings; and partitions (14) are mounted on the inner wall of the gate frame (6) and are located on both sides of the straight groove frame (11); the partitions (14) are rotatably connected to the inner wall of the gate frame (6) via bearings. A screw rod (20) connected to the swing plate (12) is connected, a threaded sleeve (22) is installed on the side of the sealing side plate (8) away from the sealing ring (21), and the threaded sleeve (22) is sleeved on the outside of the screw rod (20), a guide rod (13) is installed at the bottom of the straight groove frame (11), a sleeve (15) located outside the guide rod (13) is installed at the bottom of the inner wall of the gate frame (6), and a first return spring (23) connected to the sleeve (15) is provided at the bottom end of the guide rod (13).

3. A corrosion-resistant high-sealing flat gate valve according to claim 2, characterized in that: The number of the screw rods (20) is two, and the two screw rods (20) are symmetrically arranged along the vertical center axis of the partition plate (14).

4. The corrosion-resistant high-sealing flat gate valve according to claim 2, characterized in that: The inner width of the straight groove frame (11) is equal to the diameter of the extruded connecting pin (10), and the horizontal height of the extruded connecting pin (10) is greater than the horizontal height of the screw rod (20).

5. The corrosion-resistant high-sealing flat gate valve according to claim 2, characterized in that: The sealing detection component comprises a detection chamber (17) installed at the bottom of the gate frame (6) and located on one side of the limit column (7); a flow blocker (24) is slidably connected to the interior of the detection chamber (17); a plug rod (25) located on the inner side of the detection chamber (17) is provided on one side of the flow blocker (24); a first contact piece (28) is installed on one end of the plug rod (25) away from the flow blocker (24); a push plate (32) slidably connected to the detection chamber (17) is provided on the plug rod (25); a clamping hole (26) is provided on the plug rod (25); a connecting rod (30) is installed on the inner wall of the detection chamber (17); a second contact piece (29) flush with the first contact piece (28) is installed on one end of the connecting rod (30); and a first contact piece (28) is installed on one end of the push plate (32) away from the flow blocker (24). A second return spring (31) connected to the inner wall of the detection chamber (17) is arranged on the side thereof; a pressure rod (18) located on one side of the guide rod (13) is installed at the bottom of the straight groove frame (11); a movable frame (16) extending to the inner side of the gate frame (6) is inserted into the inner side of the detection chamber (17); a push pin (33) located below the insertion rod (25) is installed on the inner side of the movable frame (16); a movable latch pin (27) extending to the inner side of the latch hole (26) is sleeved on the push pin (33); a third return spring (34) connected to the movable frame (16) and located on the outer side of the push pin (33) is arranged at the bottom of the movable latch pin (27); a battery (35) is installed on the top of the valve body (3); and a buzzer (36) is installed on the top of the battery (35).

6. The corrosion-resistant high-sealing flat gate valve according to claim 5, characterized in that: The diameters of the locking hole (26) and the movable locking pin (27) are equal, and the inner width of the movable frame (16) is greater than the diameter of the insertion rod (25).

7. The corrosion-resistant high-sealing flat gate valve according to claim 5, characterized in that: The second contact piece (29) is electrically connected to the battery (35) via a wire, and the first contact piece (28) is electrically connected to the buzzer (36) via a wire.

8. The corrosion-resistant high-sealing flat gate valve according to claim 5, characterized in that: One end of the detection chamber (17) away from the connecting rod (30) is open, and the periphery of the flow blocking plug (24) fits closely to the inner wall of one end of the detection chamber (17).

9. The corrosion-resistant high-sealing flat gate valve according to claim 5, characterized in that: The tip of the conical block (19) faces the valve body pipe (1), the maximum diameter of the conical block (19) is smaller than the inner wall diameter of the valve body pipe (1), and the height of the conical block (19) is smaller than the maximum moving distance of the sealing side plate (8).

10. The corrosion-resistant high-sealing flat gate valve according to claim 5, characterized in that: A ball is provided at one end of the movable latch (27) away from the push pin (33), and the distance between the first contact piece (28) and the second contact piece (29) is smaller than the shortest distance between the blocking plug (24) and the push pin (33).

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