A gate valve

Abstract

The application discloses a gate valve, which comprises a valve body, a valve cover, a valve core and a valve rod, the valve cover is fixedly connected with the valve body, the valve body is provided with an inflow hole, an outflow hole and a mounting cavity, the valve core is located in the mounting cavity, one end of the valve rod is fixedly connected with the valve core, the other end of the valve rod is threadedly connected with a hand wheel after penetrating through the valve cover, the hand wheel is rotatably installed on the valve cover, the valve body is provided with valve seats corresponding to the two sides of the valve core, the valve body is provided with sealing inclined surfaces matched with the valve seats, the inflow hole is in a stepped hole structure, and a filter assembly is arranged in the inflow hole, the filter plate arranged in the inflow hole can filter impurities in fluid, and when the valve is closed, the movable rod and the dredging piece are pushed by the valve core to slide towards the filter plate, the dredging rod is inserted into the filter hole, and thus the filter plate is prevented from being blocked.

Description

Technical Field

[0001] This invention discloses a gate valve, belonging to the field of valve technology. Background Technology

[0002] A gate valve is a valve with a gate as its opening and closing element. The direction of the gate's movement is perpendicular to the direction of fluid flow, and the gate valve can only be fully open or fully closed. A baffle is installed between the inlet and outlet of the gate valve, perpendicular to the direction of fluid flow. The fluid must bypass the baffle to flow from the inlet to the outlet. Because there is a certain space below the baffle in the valve body, impurities in the fluid can easily accumulate there, eventually affecting the valve's closure. Therefore, a filter device needs to be installed in the gate valve. However, existing filters tend to become clogged after a period of use, requiring disassembly and cleaning, making the overall operation cumbersome and hindering regular maintenance. Summary of the Invention

[0003] The purpose of this invention is to solve the problems in the prior art and to provide a gate valve.

[0004] The present invention achieves the above-mentioned objectives through the following technical solution: a gate valve, comprising a valve body, a valve cover, a valve core, and a valve stem. The valve cover is fixedly connected to the valve body. The valve body is provided with an inlet hole, an outlet hole, and a mounting cavity. The valve core is located in the mounting cavity. One end of the valve stem is fixedly connected to the valve core, and the other end passes through the valve cover and is threadedly connected to a handwheel. The handwheel is rotatably mounted on the valve cover. Valve seats are provided on both sides of the valve body corresponding to the valve core, and the valve body has a sealing bevel that mates with the valve seats. The inlet hole has a stepped hole structure. Furthermore, a filter assembly is provided inside the inlet hole. The filter assembly includes a filter plate, a drain plug, a movable rod, and a spring. The filter plate is installed inside the inlet hole and has multiple arrayed filter holes. The drain plug has a drain rod that mates with the filter holes. The valve seat located inside the inlet hole has a mounting part. One end of the movable rod passes through the mounting part and is fixedly connected to the drain plug. The spring is sleeved on the outside of the movable rod and applies a force close to the valve core to the movable rod. A sealing assembly is provided on the valve cover.

[0005] Preferably, the unblocking component includes a connecting part and a fixing part. Multiple sets of fixing parts are provided and distributed at equal angles around the connecting part. The unblocking rod is disposed on the fixing part, and there is a perforation between two adjacent fixing parts for fluid to pass through.

[0006] Preferably, a connecting rod and a limiting rod are respectively provided on both sides of the connecting part. The connecting rod is fixedly connected to the movable rod, and the limiting rod has a non-circular cross-section and is slidably disposed with the filter plate.

[0007] Preferably, the valve body has a slag discharge hole near the inlet hole, and the valve body is provided with a plug for sealing the slag discharge hole.

[0008] Preferably, the ends of the inlet hole and the outlet hole that are far apart from each other have internal threads.

[0009] Preferably, the sealing assembly includes a fixing bolt, a nut, a pressure plate, and a pressure sleeve. Multiple sets of fixing bolts and nuts are provided. One end of the fixing bolt passes through the valve cover and the pressure plate and is connected to the nut. The valve cover is provided with a groove. One end of the pressure sleeve abuts against the pressure plate, and the other end is located in the groove. The groove is filled with sealing filler.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] By setting up a filter assembly, the filter plate can filter large particulate impurities in the fluid. When impurities clog the filter plate, by closing the valve, the valve core pushes the movable rod and the unblocking part to slide, so that the unblocking rod can unblock the filter plate. There is no need to disassemble the filter assembly, and the operation is simple and convenient. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a gate valve according to the present invention;

[0013] Figure 2 This is a schematic diagram of the structure of the filter assembly and valve seat in this invention;

[0014] Figure 3 This is a schematic diagram of the internal structure of the filter assembly and valve seat in this invention;

[0015] Figure 4 This is a schematic diagram of the unblocking component in this invention;

[0016] Reference numerals: 1. Valve body; 2. Valve cover; 3. Pressure plate; 4. Nut; 5. Handwheel; 6. Pressure sleeve; 7. Fixing bolt; 8. Valve stem; 9. Mounting cavity; 10. Outlet hole; 11. Valve seat; 12. Valve core; 13. Plug; 14. Slag discharge hole; 15. Inlet hole; 16. Filter assembly; 17. Filter plate; 18. Unblocking component; 19. Mounting part; 20. Unblocking rod; 21. Spring; 22. Movable rod; 23. Connecting part; 24. Limiting rod; 25. Fixing part; 26. Connecting rod. Detailed Implementation

[0017] 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.

[0018] like Figures 1-4 As shown, a gate valve includes a valve body 1, a valve cover 2, a valve core 12, and a valve stem 8. The valve cover 2 is fixedly connected to the valve body 1. The valve body 1 has an inlet hole 15, an outlet hole 10, and a mounting cavity 9. The valve core 12 is located in the mounting cavity 9. One end of the valve stem 8 is fixedly connected to the valve core 12, and the other end passes through the valve cover 2 and is threadedly connected to a handwheel 5. The handwheel 5 is rotatably mounted on the valve cover 2. Valve seats 11 are provided on both sides of the valve body 1 corresponding to the valve core 12, and the valve body 1 has a sealing bevel that mates with the valve seats 11. The inlet hole 15 has a stepped hole structure, and a filter assembly is provided inside the inlet hole 15. 16. The filter assembly 16 includes a filter plate 17, a draining component 18, a movable rod 22, and a spring 21. The filter plate 17 is installed in the inlet hole 15 and has multiple arrayed filter holes. The draining component 18 has a draining rod 20 that cooperates with the filter holes. The valve seat 11 located in the inlet hole 15 has a mounting part 19. One end of the movable rod 22 passes through the mounting part 19 and is fixedly connected to the draining component 18. The spring 21 is sleeved on the outside of the movable rod 22 and applies a force close to the valve core 12 to the movable rod 22. The valve cover 2 is provided with a sealing assembly.

[0019] The unblocking component 18 includes a connecting part 23 and a fixing part 25. Multiple sets of fixing parts 25 are provided and are distributed at equal angles around the connecting part 23. The unblocking rod 20 is provided on the fixing part 25. There is a hollow between two adjacent fixing parts 25 for fluid to pass through. A connecting rod 26 and a limiting rod 24 are respectively provided on both sides of the connecting part 23. The connecting rod 26 is fixedly connected to the movable rod 22. The limiting rod 24 has a non-circular cross section and is slidably disposed with the filter plate 17. The relative position of the unblocking component 18 and the filter screen is limited by the limiting rod 24, so that the unblocking rod 20 and the filter hole are always aligned. In this way, when the unblocking component 18 slides towards the filter plate 17, the unblocking rod 20 can be smoothly inserted into the filter hole. In order to improve the strength of the unblocking component 18, the more fixing parts 25 there are, the greater the strength with the connecting part 23. And when the end of the fixing part 25 is engaged with the inflow hole 15, the unblocking component 18 is more stable under force.

[0020] The valve body 1 has a slag discharge hole 14 near the inlet hole 15, and the valve body 1 is provided with a plug 13 for sealing the slag discharge hole 14. The slag discharge hole 14 is located at the lowest position of the inlet hole 15. When there is a lot of impurities on one side of the filter plate 17, the fluid can carry the impurities out of the slag discharge hole 14 by removing the plug 13.

[0021] The inlet hole 15 and the outlet hole 10 are separated by an internal thread at their ends. This design facilitates the connection of external pipes to the valve body 1, thereby ensuring the delivery of fluid.

[0022] The sealing assembly includes a fixing bolt 7, a nut 4, a pressure plate 3, and a pressure sleeve 6. Multiple sets of fixing bolts 7 and nuts 4 are provided. One end of the fixing bolt 7 passes through the valve cover 2 and the pressure plate 3 and is connected to the nut 4. The valve cover 2 is provided with a groove. One end of the pressure sleeve 6 abuts against the pressure plate 3, and the other end is located in the groove. The groove is filled with sealing filler. By tightening the nut 4 on the fixing bolt 7, the nut 4 pushes the pressure plate 3 downward. The pressure plate 3 applies a thrust to the pressure sleeve 6, so that the pressure sleeve 6 can compact the sealing filler more tightly, thereby effectively ensuring the sealing between the valve stem 8 and the valve cover 2.

[0023] Working principle: After the gate valve is assembled, when the gate valve is opened, the unblocking component 18 is kept away from the filter plate 17 under the action of the spring 21. At this time, the fluid can pass through the filter hole and flow normally. After the gate valve has been used for a period of time, the filter plate 17 is blocked by impurities. At this time, by turning the handwheel 5, the valve stem 8 drives the valve core 12 to descend, so that the valve core 12 abuts against the valve seat 11. When one end of the moving rod 22 abuts against the sealing slope on the surface of the valve core 12, the moving rod 22 drives the unblocking component 18 to slide towards the filter plate 17 until the unblocking rod 20 passes through the filter hole, thereby achieving the effect of unblocking the filter plate 17. When the valve is opened again, the filter plate 17 can filter the fluid again, and impurities will not accumulate at the bottom of the installation cavity 9. When too much impurity accumulates on one side of the filter plate 17, the plug 13 is removed, allowing the fluid to carry the impurities out from the slag discharge hole 14.

[0024] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A gate valve comprising a valve body (1), a bonnet (2), a disc (12) and a stem (8), characterized in that, The valve cover (2) is fixedly connected to the valve body (1). The valve body (1) is provided with an inflow hole (15), an outflow hole (10), and a mounting cavity (9). The valve core (12) is located in the mounting cavity (9). One end of the valve stem (8) is fixedly connected to the valve core (12), and the other end passes through the valve cover (2) and is threadedly connected to a handwheel (5). The handwheel (5) is rotatably mounted on the valve cover (2). The valve body (1) is provided with valve seats (11) on both sides corresponding to the valve core (12), and the valve body (1) has a sealing bevel that cooperates with the valve seat (11). The inflow hole (15) has a stepped hole structure, and a filter assembly (16) is provided in the inflow hole (15). The filter assembly (16) The valve includes a filter plate (17), a draining component (18), a movable rod (22), and a spring (21). The filter plate (17) is installed in the inlet hole (15) and has multiple arrayed filter holes. The draining component (18) has a draining rod (20) that cooperates with the filter holes. The valve seat (11) located in the inlet hole (15) has a mounting part (19). One end of the movable rod (22) passes through the mounting part (19) and is fixedly connected to the draining component (18). The spring (21) is sleeved on the outside of the movable rod (22) and applies a force close to the valve core (12) to the movable rod (22). The valve cover (2) has a sealing assembly.

2. A gate valve according to claim 1, wherein The unblocking component (18) includes a connecting part (23) and a fixing part (25). The fixing part (25) is provided in multiple sets and is distributed at equal angles with the connecting part (23) as the center. The unblocking rod (20) is provided on the fixing part (25). There is a hollow between two adjacent fixing parts (25) for fluid to pass through.

3. A gate valve according to claim 2, wherein The connecting part (23) is provided with a connecting rod (26) and a limiting rod (24) on both sides respectively. The connecting rod (26) is fixedly connected to the movable rod (22). The limiting rod (24) has a non-circular cross section and is slidably disposed with the filter plate (17).

4. A gate valve according to claim 1, characterized in that, The valve body (1) has a slag discharge hole (14) near the inlet hole (15), and the valve body (1) is provided with a plug (13) for sealing the slag discharge hole (14).

5. A gate valve according to claim 1, characterized in that, The inflow hole (15) and the outflow hole (10) are separated by an internal thread at their ends.

6. A gate valve according to claim 1, characterized in that, The sealing assembly includes a fixing bolt (7), a nut (4), a pressure plate (3), and a pressure sleeve (6). Multiple sets of fixing bolts (7) and nuts (4) are provided. One end of the fixing bolt (7) passes through the valve cover (2) and the pressure plate (3) and is connected to the nut (4). The valve cover (2) is provided with a groove. One end of the pressure sleeve (6) abuts against the pressure plate (3), and the other end is located in the groove. The groove is filled with sealing filler.

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