Leakage-proof super-wear-resistant knife gate valve

Abstract

The invention discloses a leakage-proof super-wear-resistant knife gate valve which comprises a valve body, a control valve seat is arranged at the top end of the valve body, a sealing valve plate is arranged in the valve body, the sealing valve plate penetrates through the valve body, and an adjusting valve seat for driving the sealing valve plate to ascend and descend is arranged at the top end of the control valve seat. A sealing inserting groove which is in inserted connection with the sealing valve plate in a sealed mode is formed in the valve body, an inflation sealing ring for improving the sealing and leakage-proof performance is connected to the inner side of the sealing inserting groove in an embedded mode, an inflation pipe is fixedly installed at one end of the inflation sealing ring and penetrates through the valve body, and a sealing inserting rod is inserted into an inflation opening of the inflation pipe. A feeding hole is formed in one end of the valve body; solid particles in materials can be filtered through the filter screen plate, the situation that the solid particles enter the sealing insertion groove to accelerate abrasion of the inflation sealing ring, and sealing leakage is caused is reduced, and the leakage-proof performance of the valve body is improved.

Description

Technical Field

[0001] The invention relates to the technical field of knife gate valves, in particular to a leak-proof and super-wear-resistant knife gate valve. Background Art

[0002] Knife gate valve, also known as knife-type gate valve, knife-gate gate valve, slurry valve, mud valve, is widely used in mining, sewage treatment, papermaking, coal chemical industry, steel, thermal power generation and other fields due to its advantages of small installation space, not easy to accumulate debris, and easy to cut off the fibers in the medium. It occupies a pivotal position in the national economy.

[0003] The knife gate valve is mainly composed of valve body, gate and transmission device. It has a relatively simple structure, no complex internal structure, relatively low manufacturing and maintenance costs, and is easy to understand and operate. When the knife gate valve is switched, the gate is easily damaged due to the presence of solid particles. The damaged surface of the gate carries solid particles into the packing cavity, which will accelerate the wear of the packing and cause leakage at the packing seal. Summary of the invention

[0004] The purpose of the present invention is to provide a leak-proof and super-wear-resistant knife gate valve to solve the problem that the knife gate valve is mainly composed of a valve body, a gate plate, a transmission device and other components, has a relatively simple structure, no complex internal structure, relatively low manufacturing and maintenance costs, and is easy to understand and operate. When the knife gate valve is switched, the gate plate is easily damaged due to the presence of solid particles. The damaged surface of the gate plate carries solid particles into the packing cavity, which will accelerate the wear of the packing and cause leakage at the packing seal.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a leakproof and super wear-resistant knife gate valve, comprising a valve body, a control valve seat is arranged at the top of the valve body, a sealing valve plate is arranged inside the valve body, the sealing valve plate passes through the valve body and the control valve seat, and an adjusting valve seat is arranged at the top of the sealing valve plate to drive the sealing valve plate to rise and fall, a sealing slot for plugging and sealing with the sealing valve plate is provided inside the valve body, and an inflatable sealing ring for increasing the sealing and leak-proof performance is embedded inside the sealing slot, one end of the inflatable sealing ring is fixedly installed with an inflatable tube that passes through the valve body and is fixedly installed at the outer end, and a sealing plug rod is plugged into the inflatable port of the inflatable tube, a feed port is provided at one end of the valve body, and a mounting flange 1 is fixedly installed on one side of the valve body near the feed port, a discharge port is provided at one end of the valve body, and a mounting flange 2 is fixedly installed on one side of the valve body near the discharge port, a mounting disc is provided inside the valve body and on one side near the feed port, and a filter screen plate for blocking solid particles is fixedly installed at one end of the mounting disc.

[0006] As a further solution of the present invention: a mounting groove for mounting the mounting disc is provided inside the valve body, and the mounting groove is evenly arranged around the inside of the valve body, and a mounting block matching the mounting groove is fixedly installed on the outer circumference of the mounting disc.

[0007] As a further solution of the present invention: a connecting spring for reducing the impact speed of the material is fixedly installed inside the installation groove.

[0008] As a further solution of the present invention: a sliding groove for sliding the mounting block is provided inside the mounting groove, and the sliding groove is symmetrically provided inside the mounting groove, and sliding blocks slidably adapted to the sliding groove are symmetrically fixed at both ends of the mounting block.

[0009] As a further solution of the present invention: a plug-in block which is plugged and fixed to the filter screen is slidably connected to the inner side of the mounting disc, and the plug-in block is evenly slidably connected to the inner side of the mounting disc, and plug-in grooves which are plugged and fixed to the plug-in block are evenly opened around the outer periphery of the filter screen, and sliding grooves which slide with the mounting disc are symmetrically opened at both ends of the plug-in block.

[0010] As a further solution of the present invention: a rotating disk is rotatably connected inside the fixed disk, and an arc groove is evenly arranged around one end of the rotating disk to drive the plug-in block to rise and fall, and a connecting shaft compatible with the arc groove is fixedly installed at one end of the plug-in block.

[0011] As a further solution of the present invention: one end of the rotating disk is fixedly installed and an L-shaped adjusting rod passes through the mounting disk, one end of the mounting disk is provided with a limiting groove near one end of the L-shaped adjusting rod, and a limiting rod adapted to the limiting groove is slidably connected inside the L-shaped adjusting rod.

[0012] As a further solution of the present invention: a through slot is opened inside the L-shaped adjusting rod for the limiting rod to slide, and a reset spring is fixedly installed inside the through slot for the limiting rod to adjust and reset, and a pulling rod is fixedly installed on one end of the limiting rod passing through the through slot and one end of the L-shaped adjusting rod.

[0013] As a further solution of the present invention: a guide block is fixedly installed on the inner side of the installation disc to facilitate the installation and guidance of the filter screen plate, and the guide block is evenly fixedly installed on the inner side of the installation disc, and a guide groove that is compatible with the guide block is evenly opened around the outer circumference of the filter screen plate.

[0014] As a further solution of the present invention: flange slot holes for installation are evenly arranged around one end of the mounting flange 1 and the mounting flange 2, a sealing groove for increasing the sealing performance of the connection and installation is arranged at one end of the mounting flange 1, and a sealing ring matching the sealing groove is fixedly installed at one end of the mounting flange 2.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention can filter solid particles in the material through the filter screen plate, reduce the solid particles entering the sealing slot to accelerate the wear of the inflatable sealing ring, resulting in sealing leakage, and improve the anti-leakage performance of the valve body; The filter screen can be quickly installed and replaced through the plug-in slot, plug-in block, rotating disk and L-shaped adjustment rod, which increases the convenience of installation; When the inflatable sealing ring inside the sealing slot is worn, the staff only needs to open the sealing rod at one end of the inflation tube, connect the air pump to the inflation tube to inflate it, and then inflate the inflatable sealing ring to reduce the leakage caused by the gap between the sealing valve plate and the sealing slot caused by the wear of the inflatable sealing ring, thereby increasing the wear resistance of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 The present invention Figure 1 A schematic diagram of the local enlarged structure at point A in the middle; Figure 3 It is a side structural schematic diagram of the valve body of the present invention; Figure 4 Schematic diagram of the opening structure of the sealing valve plate of the present invention; Figure 5 It is a partial structural schematic diagram of the valve body of the present invention; Figure 6 It is a schematic diagram of the unfolded structure of the mounting disc and the filter screen plate of the present invention; Figure 7 It is a schematic diagram of the cross-sectional structure of the mounting disc of the present invention; Figure 8 It is a structural schematic diagram of the rotating disk of the present invention.

[0017] In the figure: 1. valve body; 2. control valve seat; 3. sealing valve plate; 4. regulating valve seat; 5. sealing slot; 6. inflatable sealing ring; 7. inflating tube; 8. sealing plug rod; 9. mounting disc; 10. mounting groove; 11. mounting block; 12. sliding block; 13. connecting spring; 14. filter screen; 15. guide block; 16. guide groove; 17. plug-in groove; 18. plug-in block; 19. rotating disc; 20. arc groove; 21. connecting shaft; 22. slide groove; 23. L-shaped adjusting rod; 24. limit groove; 25. limit rod; 26. through groove; 27. reset spring; 28. pulling rod; 29. ​​mounting flange 1; 30. mounting flange 2; 31. flange slot hole; 32. feed inlet; 33. discharge outlet; 34. sealing ring; 35. sealing groove; 36. sliding groove. 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 orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 its embodiments based on the overall structure of the present invention.

[0020] Reference Figures 1 to 8 In the embodiment of the present invention, a leakproof and super wear-resistant knife gate valve comprises a valve body 1, a control valve seat 2 is arranged at the top of the valve body 1, a sealing valve plate 3 is arranged inside the valve body 1, the sealing valve plate 3 passes through the valve body 1 and the control valve seat 2, and a regulating valve seat 4 is arranged at the top of the sealing valve plate 3 to drive the sealing valve plate 3 to rise and fall, a sealing slot 5 is provided inside the valve body 1 and is plugged and sealed with the sealing valve plate 3, and an inflatable sealing ring 6 for increasing the sealing and leakproof performance is embedded inside the sealing slot 5, and one end of the inflatable sealing ring 6 is fixedly installed with a valve seat 4 passing through the valve body 1 and outside the sealing slot 5. An inflation tube 7 is fixedly installed at one end, and a sealing plug rod 8 is plugged into the inflation port of the inflation tube 7. A feed port 32 is provided at one end of the valve body 1, and a mounting flange 29 is fixedly installed on one side of the valve body 1 near the feed port 32. A discharge port 33 is provided at one end of the valve body 1, and a mounting flange 2 30 is fixedly installed on one side of the valve body 1 near the discharge port 33. A mounting disc 9 is provided inside the valve body 1 and near the feed port 32, and a filter screen plate 14 for blocking solid particles is fixedly installed at one end of the mounting disc 9. Through the implementation of this method: the inflatable sealing ring 6 is a rubber sealing ring, the rubber has a certain wear resistance and good elasticity, and the solid particles in the material can be filtered through the filter mesh plate 14, reducing the solid particles from entering the sealing slot 5 to accelerate the wear of the inflatable sealing ring 6, resulting in sealing leakage, thereby increasing the leakage-proof performance of the valve body 1, and inflating the inflatable sealing ring 6 to reduce the leakage caused by the gap between the sealing valve plate 3 and the sealing slot 5 when the inflatable sealing ring 6 is worn, thereby increasing the wear resistance of the valve body 1.

[0021] Reference Figures 1 to 8 , a mounting groove 10 for mounting the mounting disc 9 is provided inside the valve body 1, and the mounting groove 10 is uniformly arranged around the inside of the valve body 1, and a mounting block 11 adapted to the mounting groove 10 is fixedly installed on the outer circumference of the mounting disc 9, a connecting spring 13 for slowing down the impact speed of the material is fixedly installed inside the mounting groove 10, a sliding groove 36 for the mounting block 11 to slide is provided inside the mounting groove 10, and the sliding groove 36 is symmetrically arranged on the inner side of the mounting groove 10, and sliding blocks 12 adapted to slide with the sliding groove 36 are symmetrically fixed at both ends of the mounting block 11; Through the implementation of this method: the connecting spring 13 inside the mounting groove 10 can play a buffering role when the material impacts. When the material impacts the valve, the impact force will be transmitted to the mounting block 11 through the mounting disc 9, thereby compressing the connecting spring 13. The elastic deformation of the spring can absorb and consume part of the impact energy, thereby slowing down the impact speed of the material on the valve, protecting the internal components of the valve from damage caused by excessive impact force, and extending the service life of the valve.

[0022] Reference Figures 1 to 8 , a plug-in block 18 is slidably connected to the inner side of the mounting disc 9 and is plugged and fixed with the filter screen plate 14, and the plug-in block 18 is evenly slidably connected to the inner side of the mounting disc 9, and a plug-in groove 17 is evenly opened around the outer periphery of the filter screen plate 14 and is plugged and fixed with the plug-in block 18, and slide grooves 22 for sliding with the mounting disc 9 are symmetrically opened at both ends of the plug-in block 18, and a rotating disc 19 is rotatably connected inside the fixed disc 9, and an arc groove 20 is evenly opened around one end of the rotating disc 19 to drive the plug-in block 18 to rise and fall, and a connecting shaft 21 adapted to the arc groove 20 is fixedly installed at one end of the plug-in block 18; Through the implementation of this method: the rotating disk 19 is driven to rotate by toggling the L-shaped adjustment rod 23, and the rotating disk 19 rotates and the arc groove 20 at one end thereof and the connecting shaft 21 at one end of the plug-in block 18 will lower the plug-in block 18 into the plug-in groove 17 to complete the plug-in limit fixation.

[0023] Reference Figures 1 to 8, one end of the rotating disk 19 is fixedly installed and an L-shaped adjusting rod 23 is passed through the installation disk, one end of the installation disk 9 is provided with a limiting groove 24 near one end of the L-shaped adjusting rod 23, and a limiting rod 25 adapted to the limiting groove 24 is slidably connected inside the L-shaped adjusting rod 23, a through groove 26 for the limiting rod 25 to slide is provided inside the L-shaped adjusting rod 23, and a reset spring 27 for the limiting rod 25 to adjust and reset is fixedly installed inside the through groove 26, and a pulling rod 28 is fixedly installed at one end of the limiting rod 25 passing through the through groove 26 and one end of the L-shaped adjusting rod 23; Through the implementation of this method: loosen the pull rod 28, the pull rod 28 will automatically bounce into the limit groove 24 through the return spring 27 inside the through groove 26 to complete the limitation, and complete the installation of the filter plate 14. Through the plug-in groove 17, the plug-in block 18, the rotating disk 19 and the L-shaped adjustment rod 23, the filter plate 14 can be quickly installed and replaced, increasing the convenience of installation.

[0024] Reference Figures 1 to 8 A guide block 15 is fixedly installed on the inner side of the installation disc 9 to facilitate the installation and guidance of the filter screen plate 14, and the guide block 15 is evenly fixedly installed around the inner side of the installation disc 9, and a guide groove 16 adapted to the guide block 15 is evenly opened around the outer periphery of the filter screen plate 14; By implementing this method, the guide block 15 is evenly fixed around the inner side of the mounting disc 9, and the guide groove 16 on the outer periphery of the filter screen plate 14 is adapted thereto. This design enables the guide block 15 to be accurately inserted into the guide groove 16 when the filter screen plate 14 is installed, providing a precise installation guide for the filter screen plate 14.

[0025] Reference Figures 1 to 8 The mounting flange 1 29 and the mounting flange 2 30 are evenly surrounded by flange slots 31 for mounting, the mounting flange 1 29 is provided with a sealing groove 35 for increasing the sealing performance of the connection and mounting, and the mounting flange 2 30 is fixedly provided with a sealing ring 34 adapted to the sealing groove 35; By implementing this method, the sealing groove 35 at one end of the mounting flange 1 29 is matched with the sealing ring 34 at one end of the mounting flange 2 30. During installation, the sealing ring 34 is tightly embedded in the sealing groove 35. This structure can effectively prevent leakage of the medium in the pipeline.

[0026] The working principle of the present invention is: when installing the valve body 1, first align the filter screen plate 14 with the installation disc 9 through the guide groove 16 and the guide block 15, and then push the filter screen plate 14. Since the side of the plug-in block 18 close to the plug-in groove 17 is an inclined surface, when pushing the filter screen plate 14, the plug-in block 18 will be squeezed into the interior of the installation disc 9, and then the rotating disk 19 is driven to rotate by toggling the L-shaped adjustment rod 23. Through the rotation of the rotating disk 19, and through the arc groove 20 at one end thereof and the connecting shaft 21 at one end of the plug-in block 18, the plug-in block 18 will be lowered into the plug-in groove 17 to complete the plug-in limit fixation. At this time, the pull rod 28 is released, and the pull rod 28 will automatically bounce it into the limit groove 24 through the reset spring 27 inside the through groove 26 to complete the limit, thereby completing the filter screen plate 14. The installation of the filter screen 14 can filter the solid particles in the material, reduce the solid particles entering the sealing slot 5 and accelerating the wear of the inflatable sealing ring 6, resulting in sealing leakage, and increase the leakage-proof performance of the valve body 1. At the same time, the filter screen 14 can be quickly installed and replaced through the plug-in slot 17, the plug-in block 18, the rotating disk 19 and the L-shaped adjusting rod 23, which increases the convenience of installation. When the inflatable sealing ring 6 inside the sealing slot 5 is worn, the staff only needs to open the sealing plug rod 8 at one end of the inflation tube 7, and connect the air pump to the inflation tube 7 to inflate, and can inflate the inflatable sealing ring 6, reduce the leakage caused by the gap between the sealing valve plate 3 and the sealing slot 5 caused by the wear of the inflatable sealing ring 6, and increase the wear resistance of the valve body 1.

[0027] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A leakproof and super wear-resistant knife gate valve, characterized in that: The invention comprises a valve body (1), a control valve seat (2) is arranged at the top of the valve body (1), a sealing valve plate (3) is arranged inside the valve body (1), the sealing valve plate (3) penetrates the valve body (1) and the control valve seat (2), and a regulating valve seat (4) is arranged at the top of the sealing valve plate (3) for driving the sealing valve plate (3) to move up and down, a sealing slot (5) is arranged inside the valve body (1) for plugging and sealing with the sealing valve plate (3), and an inflatable sealing ring (6) for improving the sealing and leak-proof performance is embedded inside the sealing slot (5), and a gas-filled pipe (6) is fixedly installed at one end of the gas-filled sealing ring (6) which penetrates the valve body (1) and is fixedly installed at the outer end thereof. (7), and the inflation port of the inflation tube (7) is plugged with a sealing plug rod (8), one end of the valve body (1) is provided with a feed port (32), and a mounting flange 1 (29) is fixedly installed on one end of the valve body (1) close to the feed port (32), one end of the valve body (1) is provided with a discharge port (33), and a mounting flange 2 (30) is fixedly installed on one end of the valve body (1) close to the discharge port (33), a mounting disc (9) is arranged inside the valve body (1) close to the feed port (32), and a filter screen (14) for blocking solid particles is fixedly installed on one end of the mounting disc (9).

2. The leakproof and super wear-resistant knife gate valve according to claim 1 is characterized in that: The valve body (1) is provided with a mounting groove (10) for mounting the mounting disc (9), and the mounting groove (10) is evenly arranged around the inside of the valve body (1), and a mounting block (11) matching the mounting groove (10) is fixedly mounted on the outer circumference of the mounting disc (9).

3. The leakproof and super wear-resistant knife gate valve according to claim 2 is characterized in that: A connecting spring (13) for reducing the impact speed of the material is fixedly installed inside the installation groove (10).

4. The leakproof and super wear-resistant knife gate valve according to claim 2 is characterized in that: A sliding groove (36) for the mounting block (11) to slide is provided inside the mounting groove (10), and the sliding groove (36) is symmetrically provided inside the mounting groove (10), and sliding blocks (12) slidably adapted to the sliding groove (36) are symmetrically fixed at both ends of the mounting block (11).

5. The leakproof and super wear-resistant knife gate valve according to claim 1 is characterized in that: The inner side of the mounting disc (9) is slidably connected to a plug-in block (18) plugged and fixed to the filter screen plate (14), and the plug-in block (18) is evenly circumferentially connected to the inner side of the mounting disc (9). The outer circumference of the filter screen plate (14) is evenly circumferentially provided with plug-in grooves (17) plugged and fixed to the plug-in block (18), and two ends of the plug-in block (18) are symmetrically provided with sliding grooves (22) that slide with the mounting disc (9).

6. The leakproof and super wear-resistant knife gate valve according to claim 5 is characterized in that: A rotating disk (19) is rotatably connected inside the fixed disk (9), and an arc groove (20) is evenly arranged around one end of the rotating disk (19) for driving the plug-in block (18) to move up and down, and a connecting shaft (21) adapted to the arc groove (20) is fixedly installed at one end of the plug-in block (18).

7. The leakproof and super wear-resistant knife gate valve according to claim 6, characterized in that: One end of the rotating disk (19) is fixedly mounted and an L-shaped adjusting rod (23) passes through the mounting disk. One end of the mounting disk (9) is provided with a limiting groove (24) near one end of the L-shaped adjusting rod (23), and a limiting rod (25) adapted to the limiting groove (24) is slidably connected inside the L-shaped adjusting rod (23).

8. The leakproof and super wear-resistant knife gate valve according to claim 7, characterized in that: The L-shaped adjusting rod (23) is provided with a through slot (26) for the limiting rod (25) to slide, and a return spring (27) is fixedly installed in the through slot (26) for the limiting rod (25) to adjust and return, and one end of the limiting rod (25) passes through the through slot (26) and a pulling rod (28) is fixedly installed at one end of the L-shaped adjusting rod (23).

9. The leakproof and super wear-resistant knife gate valve according to claim 1, characterized in that: A guide block (15) is fixedly mounted on the inner side of the mounting disc (9) for facilitating installation and guiding of the filter screen plate (14); the guide block (15) is evenly and fixedly mounted on the inner side of the mounting disc (9); and a guide groove (16) matching the guide block (15) is evenly and arranged around the outer circumference of the filter screen plate (14).

10. The leakproof and super wear-resistant knife gate valve according to claim 1, characterized in that: The first mounting flange (29) and one end of the second mounting flange (30) are uniformly surrounded by flange slot holes (31) for mounting, one end of the first mounting flange (29) is provided with a sealing groove (35) for increasing the sealing performance of the connection and mounting, and one end of the second mounting flange (30) is fixedly provided with a sealing ring (34) adapted to the sealing groove (35).

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