Anti-jamming pneumatic control gate valve and control method thereof

Abstract

The application discloses a pneumatic control gate valve preventing blockage and relates to the technical field of gate valves. The application comprises a valve body, a valve cover fixedly connected to the top of the valve body, corresponding grooves arranged on the valve body and the valve cover, a valve plate arranged in the grooves and used for opening and closing the valve body, a valve rod, the valve rod penetrating through and being slidingly connected to the top of the groove, the bottom of the valve rod being clamped with the valve plate, the top of the valve cover being fixedly connected with a gas cylinder, a piston plate being slidingly arranged in the gas cylinder, the top of the valve rod being penetratingly and slidingly connected with the inner wall of the bottom of the gas cylinder, and the top of the valve rod being fixedly connected to the bottom of the piston plate. The valve plate can drive the first arc-shaped pad and the second arc-shaped pad to move in the groove while moving, impurities in the groove can be cleaned and sealed through the first inclined edge and the scraper, and the position of the valve plate can be adjusted through rotating the hand wheel to drive the screw rod to lift and lower when there is no gas source, so that the valve is convenient to use.

Description

Technical Field

[0001] This invention belongs to the field of gate valve technology, and in particular relates to an anti-jamming pneumatic control gate valve and its control method. Background Technology

[0002] Pneumatic valves are valves driven by compressed air. When a pneumatic valve is working, its main pneumatic mechanism drives the valve stem, which moves up and down, to move up and down. The valve stem then drives the bottom disc to move up and down, thereby controlling the opening and closing of the valve.

[0003] A gate valve is an opening and closing element consisting of a gate. The gate's movement is perpendicular to the fluid direction. Gate valves can only be fully open or fully closed; they cannot be used for regulation or throttling. Gate valves achieve sealing through the contact between the valve seat and the gate. The sealing surface is usually overlaid with a metal material, such as stainless steel, to increase wear resistance. Gates can be rigid or resilient; based on the type of gate, gate valves are classified as rigid gate valves or resilient gate valves.

[0004] To ensure the sealing between the valve plate and the valve seat, most existing valve seats have grooves corresponding to the valve plate. Over time, impurities may accumulate inside these grooves. If not cleaned, this can affect the sealing between the valve plate and the valve seat. In addition, existing valve bodies are cumbersome to switch between pneumatic and manual operation, and it is not convenient to observe the opening and closing of the valve body. Summary of the Invention

[0005] The purpose of this invention is to provide an anti-jamming pneumatic control gate valve and its control method. When the valve plate moves, it can drive the first arc-shaped pad and the second arc-shaped pad to move in the groove. Impurities in the groove can be cleaned by the first inclined edge and the scraper, and a seal can be formed at the same time. In the absence of an air source, the position of the valve plate can be adjusted by turning the handwheel to drive the screw to lift and lower. This solves the existing technical problems.

[0006] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0007] Anti-jamming pneumatic control gate valve, including:

[0008] A valve body, the top of which is fixedly connected to a valve cover. Both the valve body and the valve cover are provided with corresponding grooves, and a valve plate for opening and closing the valve body is provided in the groove.

[0009] A valve stem is slidably connected to the top of a groove, and the bottom of the valve stem is engaged with a valve plate. A cylinder is fixedly connected to the top of the valve cover, and a piston plate is slidably disposed inside the cylinder. The top of the valve stem is slidably connected to the bottom inner wall of the cylinder, and the top of the valve stem is fixedly connected to the bottom of the piston plate. A first air hole and a second air hole are provided on one side of the cylinder for gas to enter the cylinder and drive the piston plate to move up and down.

[0010] The sealing mechanism, located on the outer wall of the valve plate, is used to seal the space between the valve plate and the valve body, and can also clean impurities in the groove.

[0011] A manual adjustment mechanism is located on top of the cylinder for manually moving the valve plate.

[0012] Optionally, the sealing mechanism includes a second sealing gasket disposed in the groove, the inner wall of the second sealing gasket abutting against the valve plate, and one side of the second sealing gasket being fixedly connected to the valve plate. Sealing can be achieved by providing the second sealing gasket between the valve seat and the valve plate.

[0013] Optionally, the manual adjustment mechanism includes a connecting cylinder that is rotatably connected to the inner wall of the top of the cylinder. A nut ring is slidably provided on the inner wall of the connecting cylinder, and a screw is threadedly connected to the inner wall of the nut ring. Rotating the connecting cylinder can drive the nut ring to rotate, which can drive the screw to move. The screw is fixedly connected to the top of the piston plate. Limiting rings are fixedly connected to both the upper and lower ends of the connecting cylinder for limiting the nut ring. A handwheel is fixedly sleeved on the outer wall of the connecting cylinder. Limiting plates are fixedly connected to the top and bottom of the piston plate for limiting the nut ring.

[0014] Optionally, the second sealing gasket further includes a first arc-shaped gasket and a second arc-shaped gasket. Both the first and second arc-shaped gaskets are provided with a straight portion and a curved portion. The straight portion is fixedly connected to one side of the valve plate, and the curved portion is slidably disposed in the groove. The curved portions are brought close to each other to form a complete sealing gasket. Limiting blocks are provided on both sides of the inner wall of the groove. Limiting grooves corresponding to the limiting blocks are provided on the opposite sides of the first and second arc-shaped gaskets to limit the sealing gasket and prevent the sealing gasket from shifting.

[0015] Optionally, one end of the first arc-shaped pad has a first inclined edge, one end of the second arc-shaped pad has a second inclined edge corresponding to the first inclined edge, one end of the second arc-shaped pad is fixedly connected to a scraper, and the inner wall of the first arc-shaped pad has a relief groove corresponding to the scraper. The first inclined edge and the scraper are close to each other to clean the impurities in the groove and prevent the impurities from contacting the valve plate, which would cause the valve to fail to seal.

[0016] Optionally, the outer wall of the valve stem is provided with a second slot, and the top of the valve plate is provided with a first slot. The valve stem is secured in the first slot through the second slot, making it easy to install and preventing it from coming off. A first sealing gasket is fixedly fitted on the outer wall of the valve stem. The first sealing gasket abuts against the inner wall of the groove to seal the valve cover.

[0017] Optionally, the outer wall of the screw is fitted with a spring located inside the cylinder. The two ends of the spring are fixedly connected to the adjacent sides of the limiting ring and the nut ring, respectively, which can limit the nut ring and enable the valve plate to close automatically. An indicator rod is fixedly connected to the top of the screw, and the opening and closing of the gate valve can be determined by the length of the extended indicator rod.

[0018] The anti-jamming pneumatic control gate valve includes the following steps:

[0019] S1. When it is necessary to open the valve body, start the external air source and let the gas enter the cylinder through the second air port. The gas drives the piston plate to move upward. The piston plate drives the valve plate to move upward through the valve rod, which can open the valve body. When it is necessary to close the valve body, start the external air source and let the gas enter the cylinder through the first air port. Disconnect the air source on the second air port. The gas can drive the piston plate to move downward, which in turn drives the valve plate to move downward, thus closing the valve body.

[0020] S2. Secondly, as the valve plate moves downward, it causes the first arc-shaped pad and the second arc-shaped pad to slide in the groove. At this time, one end of the first arc-shaped pad and the second arc-shaped pad approach each other, and the impurities in the groove can be cleaned by the first inclined edge and the scraper.

[0021] S3. When the air supply is disconnected and the position of the valve plate needs to be manually adjusted, turning the handwheel can drive the nut ring to rotate, the nut ring can drive the screw to move up and down, and can drive the piston plate to move up and down in the cylinder, so that the position of the valve plate can be manually adjusted.

[0022] The embodiments of the present invention have the following beneficial effects: while the valve plate moves, it can drive the first arc-shaped pad and the second arc-shaped pad to move in the groove. Impurities in the groove can be cleaned by the first inclined edge and the scraper, and a seal can be formed at the same time. In the absence of an air source, the position of the valve plate can be adjusted by turning the handwheel to drive the screw to raise and lower, making it convenient to use.

[0023] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present invention;

[0026] Figure 2 This is a partial cross-sectional view of the valve body according to an embodiment of the present invention;

[0027] Figure 3 This is a partial cross-sectional view of the valve body from another perspective according to an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the second sealing gasket structure according to an embodiment of the present invention;

[0029] Figure 5 This is a cross-sectional view of a connecting cylinder according to an embodiment of the present invention;

[0030] Figure 6 This is a schematic cross-sectional view of a cylinder according to an embodiment of the present invention;

[0031] Figure 7 This is an enlarged structural diagram of part A in an embodiment of the present invention.

[0032] In the diagram: 1. Valve body; 2. Groove; 3. Valve cover; 4. Cylinder; 5. Connecting cylinder; 6. Handwheel; 7. Valve stem; 8. Valve plate; 9. First slot; 10. First sealing gasket; 11. Second slot; 12. Limiting block; 13. Second sealing gasket; 14. First arc-shaped gasket; 15. Second arc-shaped gasket; 16. First bevel; 17. Second bevel; 18. Relief groove; 19. Scraper; 20. Limiting groove; 21. Screw; 22. Nut ring; 23. Indicator rod; 24. Spring; 25. Limiting ring; 26. First air hole; 27. Piston plate; 28. Second air hole; 29. ​​Limiting plate; 30. Straight section; 31. Bending section. Detailed Implementation

[0033] 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.

[0034] In the description of this invention, it should be understood that the terms "opening", "upper", "middle", "length", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0035] To keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of known functions and known components are omitted.

[0036] Example 1

[0037] Please see Figures 1-6As shown, this embodiment provides an anti-jamming pneumatic control gate valve, including:

[0038] The valve body 1 has a valve cover 3 fixedly connected to its top. Both the valve body 1 and the valve cover 3 have corresponding grooves 2, and the grooves 2 have valve plates 8 for opening and closing the valve body 1.

[0039] The valve stem 7 is slidably connected to the top of the groove 2, and the bottom of the valve stem 7 is engaged with the valve plate 8. The top of the valve cover 3 is fixedly connected to the cylinder 4, and the piston plate 27 is slidably provided inside the cylinder 4. The top of the valve stem 7 is slidably connected to the bottom inner wall of the cylinder 4, and the top of the valve stem 7 is fixedly connected to the bottom of the piston plate 27. A first air hole 26 and a second air hole 28 are provided on one side of the cylinder 4 for gas to enter the cylinder 4 and drive the piston plate 27 to move up and down.

[0040] The sealing mechanism is set on the outer wall of the valve plate 8 to seal between the valve plate 8 and the valve body 1, and can also clean impurities in the groove 2.

[0041] The manual adjustment mechanism is located on the top of the cylinder 4 and is used to manually move the valve plate 8. In the above technical solution, gas enters the cylinder 4 through the first air hole 26, which can drive the piston plate 27 to move downward. The valve plate 8 moves downward through the valve rod 7 and is locked into the groove 2 to seal the valve body 1. While the valve plate 8 moves, it can drive the sealing mechanism to further seal. At the same time, the sealing mechanism can clean impurities in the groove 2 to improve the sealing performance. Furthermore, the manual adjustment mechanism can drive the piston plate 27 to move up and down, so that it is still easy to use when the gas is cut off.

[0042] In other aspects of this embodiment, such as Figure 2 and Figure 3 As shown, the sealing mechanism includes a second sealing gasket 13 disposed in the groove 2. The inner wall of the second sealing gasket 13 abuts against the valve plate 8, and one side of the second sealing gasket 13 is fixedly connected to the valve plate 8. In the above technical solution, the second sealing gasket 13 can seal the groove 2 and the valve plate 8, thereby improving the performance.

[0043] In other aspects of this embodiment, such as Figure 1 , Figure 5 and Figure 6As shown, the manual adjustment mechanism includes a connecting cylinder 5 that is rotatably connected to the inner wall of the top of the cylinder 4. A nut ring 22 is slidably provided on the inner wall of the connecting cylinder 5. A screw 21 is threadedly connected to the inner wall of the nut ring 22. The screw 21 is fixedly connected to the top of the piston plate 27. Limiting rings 25 are fixedly connected to both the upper and lower ends of the connecting cylinder 5 to limit the nut ring 22. A handwheel 6 is fixedly sleeved on the outer wall of the connecting cylinder 5. Limiting plates 29 are fixedly connected to the top and bottom of the piston plate 27. When the gas supply is interrupted, rotating the connecting cylinder 5 can drive the nut ring 22 to rotate. The rotation of the nut ring 22 can drive the screw 21 to rise, which can drive the piston plate 27 to move. This can then drive the valve plate 8 to move through the valve rod 7. The setting of the limiting plate 29 can create a gap between the piston plate 27 and the first air hole 26 and the second air hole 28, which facilitates the entry of gas into the cylinder 4.

[0044] In other aspects of this embodiment, such as Figure 2 and Figure 3 As shown, a second slot 11 is provided on the outer wall of the valve stem 7, and a first slot 9 is provided on the top of the valve plate 8. The valve stem 7 is secured in the first slot 9 through the second slot 11. A first sealing gasket 10 is fixedly fitted on the outer wall of the valve stem 7, and the first sealing gasket 10 abuts against the inner wall of the groove 2. In the above technical solution, the opening of the second slot 11 and the first slot 9 allows the valve stem 7 and the valve plate 8 to be quickly connected together, making installation convenient.

[0045] Example 2

[0046] Improvements based on Example 1: such as... Figure 2 and Figure 4 As shown, the second sealing gasket 13 also includes a first arc-shaped gasket 14 and a second arc-shaped gasket 15. Both the first arc-shaped gasket 14 and the second arc-shaped gasket 15 are provided with a straight portion 30 and a curved portion 31. The straight portion 30 is fixedly connected to one side of the valve plate 8, and the curved portion 31 is slidably disposed in the groove 2. Both sides of the inner wall of the groove 2 are provided with limiting blocks 12. The opposite sides of the first arc-shaped gasket 14 and the second arc-shaped gasket 15 are provided with limiting grooves 20 corresponding to the limiting blocks 12. In the above technical solution, the limiting blocks 12 and the limiting grooves 20 can guide the first arc-shaped gasket 14 and the second arc-shaped gasket 15 to facilitate their movement in the groove 2. At the same time, when the first arc-shaped gasket 14 and the second arc-shaped gasket 15 move in the groove 2, they can clean the impurities in the groove 2.

[0047] In other aspects of this embodiment, such as Figure 4 and Figure 7As shown, one end of the first arc-shaped pad 14 has a first inclined edge 16, and one end of the second arc-shaped pad 15 has a second inclined edge 17 corresponding to the first inclined edge 16. One end of the second arc-shaped pad 15 is fixedly connected to a scraper 19, and the inner wall of the first arc-shaped pad 14 has a relief groove 18 corresponding to the scraper 19. In the above technical solution, the movement of the first arc-shaped pad 14 and the second arc-shaped pad 15 allows the groove 2 to be cleaned through the first inclined edge 16 and the scraper 19. The cleaned impurities are washed away by water flow until the scraper 19 moves into the relief groove 18 and is squeezed and sealed by the valve plate 8.

[0048] Example 3

[0049] Improvements based on Example 1: such as... Figure 5 As shown, a spring 24 located inside the cylinder 4 is sleeved on the outer wall of the screw 21. The two ends of the spring 24 are fixedly connected to the adjacent sides of the limiting ring 25 and the nut ring 22, respectively. An indicator rod 23 is fixedly connected to the top of the screw 21. In the above technical solution, the setting of the spring 24 enables the valve plate 8 to automatically move downward under the force of the spring 24 to close the valve body 1 when the power is off, and can limit the nut ring 22. At the same time, the opening and closing of the valve body 1 can be clearly known by observing the position of the indicator rod 23.

[0050] The anti-jamming pneumatic control gate valve includes the following steps:

[0051] S1. When it is necessary to open the valve body 1, start the external air source and let the gas enter the cylinder 4 through the second air hole 28. The gas drives the piston plate 27 to move upward. The piston plate 27 drives the valve plate 8 to move upward through the valve rod 7, which can open the valve body 1. When it is necessary to close the valve body 1, start the external air source and let the gas enter the cylinder 4 through the first air hole 26. Disconnect the air source on the second air hole 28. The gas can drive the piston plate 27 to move downward, which in turn drives the valve plate 8 to move downward, thus closing the valve body 1.

[0052] S2. Secondly, as the valve plate 8 moves downward, it drives the first arc-shaped pad 14 and the second arc-shaped pad 15 to slide in the groove 2. At this time, one end of the first arc-shaped pad 14 and the second arc-shaped pad 15 approach each other, and the impurities in the groove 2 can be cleaned by the first inclined edge 16 and the scraper 19.

[0053] S3. When the air source is disconnected and the position of the valve plate 8 needs to be manually adjusted, turning the handwheel 6 can drive the nut ring 22 to rotate. The nut ring 22 can drive the screw 21 to move up and down, which can drive the piston plate 27 to move up and down in the cylinder 4, and the position of the valve plate 8 can be manually adjusted.

[0054] It should be noted that in the description of this specification, descriptions such as "first" and "second" are only used to distinguish the features and do not have any actual order or directional meaning. This application is not limited to this.

[0055] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0056] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An anti-jamming pneumatic control gate valve, characterized in that, include: A valve body (1) is fixedly connected to a valve cover (3) on its top. Both the valve body (1) and the valve cover (3) are provided with corresponding grooves (2). A valve plate (8) for opening and closing the valve body (1) is provided in the groove (2). A valve stem (7) is slidably connected to the top of the groove (2). The bottom of the valve stem (7) is engaged with the valve plate (8). A cylinder (4) is fixedly connected to the top of the valve cover (3). A piston plate (27) is slidably provided inside the cylinder (4). The top of the valve stem (7) is slidably connected to the bottom inner wall of the cylinder (4). The top of the valve stem (7) is fixedly connected to the bottom of the piston plate (27). A first air hole (26) and a second air hole (28) are provided on one side of the cylinder (4) for gas to enter the cylinder (4) and drive the piston plate (27) to move up and down. The sealing mechanism is set on the outer wall of the valve plate (8) to seal between the valve plate (8) and the valve body (1), and can also clean impurities in the groove (2); A manual adjustment mechanism is provided on the top of the cylinder (4) for manually moving the valve plate (8); The sealing mechanism includes a second sealing gasket (13) disposed in the groove (2), the inner wall of the second sealing gasket (13) abutting against the valve plate (8), and one side of the second sealing gasket (13) being fixedly connected to the valve plate (8). The second sealing gasket (13) also includes a first arc-shaped gasket (14) and a second arc-shaped gasket (15). The first arc-shaped gasket (14) and the second arc-shaped gasket (15) are provided with a straight part (30) and a curved part (31). The straight part (30) is fixedly connected to one side of the valve plate (8). The curved part (31) is slidably disposed in the groove (2). The inner walls on both sides of the groove (2) are provided with limiting blocks (12). The opposite sides of the first arc-shaped gasket (14) and the second arc-shaped gasket (15) are provided with limiting grooves (20) corresponding to the limiting blocks (12). The first arc-shaped pad (14) has a first inclined edge (16) at one end, and the second arc-shaped pad (15) has a second inclined edge (17) corresponding to the first inclined edge (16) at one end. A scraper (19) is fixedly connected to one end of the second arc-shaped pad (15), and a relief groove (18) corresponding to the scraper (19) is provided on the inner wall of the first arc-shaped pad (14).

2. The anti-jamming pneumatic control gate valve as described in claim 1, characterized in that, The manual adjustment mechanism includes a connecting cylinder (5) that is rotatably connected to the inner wall of the top of the cylinder (4). A nut ring (22) is slidably provided on the inner wall of the connecting cylinder (5). A screw (21) is threadedly connected to the inner wall of the nut ring (22). The screw (21) is fixedly connected to the top of the piston plate (27). Limiting rings (25) are fixedly connected to both the upper and lower ends of the connecting cylinder (5) to limit the nut ring (22). A handwheel (6) is fixedly sleeved on the outer wall of the connecting cylinder (5). Limiting plates (29) are fixedly connected to the top and bottom of the piston plate (27).

3. The anti-jamming pneumatic control gate valve as described in claim 1, characterized in that, The valve stem (7) has a second slot (11) on its outer wall and a first slot (9) on the top of the valve plate (8). The valve stem (7) is secured in the first slot (9) through the second slot (11). A first sealing gasket (10) is fixedly fitted on the outer wall of the valve stem (7). The first sealing gasket (10) abuts against the inner wall of the groove (2).

4. The anti-jamming pneumatic control gate valve as described in claim 2, characterized in that, The outer wall of the screw (21) is fitted with a spring (24) located inside the cylinder (4). The two ends of the spring (24) are fixedly connected to the adjacent side of the limiting ring (25) and the nut ring (22), respectively. An indicator rod (23) is fixedly connected to the top of the screw (21).

5. The control method for the anti-jamming pneumatic control gate valve as described in claim 4, characterized in that, Includes the following steps: S1. When it is necessary to open the valve body (1), start the external air source so that the gas enters the cylinder (4) through the second air hole (28). The gas drives the piston plate (27) to move upward. The piston plate (27) drives the valve plate (8) to move upward through the valve rod (7), which can open the valve body (1). When it is necessary to close the valve body (1), start the external air source so that the gas enters the cylinder (4) through the first air hole (26). Disconnect the air source on the second air hole (28). The gas can drive the piston plate (27) to move downward, which in turn drives the valve plate (8) to move downward, thus closing the valve body (1). S2. Secondly, as the valve plate (8) moves downward, it drives the first arc-shaped pad (14) and the second arc-shaped pad (15) to slide in the groove (2). At this time, one end of the first arc-shaped pad (14) and the second arc-shaped pad (15) approach each other. The impurities in the groove (2) can be cleaned by the first inclined edge (16) and the scraper (19). S3. When the air source is disconnected and the position of the valve plate (8) needs to be manually adjusted, turning the handwheel (6) can drive the nut ring (22) to rotate. The nut ring (22) can drive the screw (21) to move up and down, and can drive the piston plate (27) to move up and down in the cylinder (4). The position of the valve plate (8) can be manually adjusted.

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