A high-efficiency sealing type knife gate valve structure

Abstract

The utility model relates to the technical field of knife gate valve, concretely relates to a high -efficient sealing type knife gate valve structure, including the valve body, be provided with the water passage chamber in the valve body, the top of valve body is provided with the valve seat, the inner wall of valve body is fixedly installed with two left and right symmetrical lower sealing pads, be provided with the center sealing pad between two lower sealing pads, the center position of center sealing pad is provided with the valve core sealing chamber, the top of valve core sealing chamber is linked with the outside, is provided with the bottom plug -in chamber on the bottom wall of valve core sealing chamber, the bottom end of bottom plug -in chamber extends to the bottom pad body of center sealing pad, the section of valve core sealing chamber is circular platform shape, the valve core of plug -in cooperation has in valve core sealing chamber, the top of valve core is fixedly installed with the valve plate, the size of valve core is compatible with the size of valve core sealing chamber. The utility model has the effect that the high -efficient sealing is not easy to wear, is favorable for prolonging the service life.

Description

Technical Field

[0001] This utility model relates to the field of knife gate valve technology, and more specifically, to a high-efficiency sealing knife gate valve structure. Background Technology

[0002] In fluid control systems, knife gate valves are an important type of valve widely used in various industrial fields, especially when handling wet or dry media such as mineral slurry, coal slurry, pulp, and mud. Their unique structural design and efficient sealing performance are particularly important. However, after long-term use, traditional knife gate valves often suffer from leakage problems due to a decline in sealing performance, which affects production efficiency and environmental safety.

[0003] Traditional knife gate valves mainly consist of a valve body, a valve plate, and a drive mechanism (such as a handle or motor). The valve plate has a knife-shaped oblique cut at its bottom to cut fibers or particles in the medium. However, its sealing structure is usually a ring-shaped sealing ring. Because the distance between each part of this type of ring-shaped sealing ring and the valve plate is constant from top to bottom, the friction between the valve plate and the sealing ring is relatively large as the valve plate moves downwards, resulting in severe wear on the sealing ring. This wear seriously affects the sealing performance of the sealing ring, hindering the achievement of efficient sealing. Therefore, we propose a high-efficiency sealing knife gate valve structure. Summary of the Invention

[0004] The purpose of this invention is to provide a high-efficiency sealing gate valve structure to solve the defects mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A high-efficiency sealing gate valve structure includes a valve body with a water passage chamber inside. A valve seat is located at the top of the valve body. Two symmetrical lower sealing gaskets are fixedly installed on the inner wall of the valve body. A central sealing gasket is located between the two lower sealing gaskets. A valve core sealing chamber is located at the center of the central sealing gasket. The top of the valve core sealing chamber is connected to the outside. A bottom insertion chamber is located on the bottom wall of the valve core sealing chamber, extending from the bottom end of the bottom insertion chamber into the bottom gasket of the central sealing gasket. The cross-section of the valve core sealing chamber is frustum-shaped. A valve core is inserted into the valve core sealing chamber. A valve plate is fixedly installed on the top of the valve core. The dimensions of the valve core are adapted to the dimensions of the valve core sealing chamber.

[0007] Preferably, a water passage hole is provided at the center of the central sealing gasket, and both ends of the water passage hole are connected to the outside.

[0008] Preferably, a central hole is provided at the center of the lower sealing gasket, and the size of the central hole is equal to the size of the water passage hole.

[0009] Preferably, a rectangular sleeve is fixedly installed on the inner wall of the valve seat, and a valve core through hole is provided in the rectangular sleeve. The valve plate passes through the valve core through hole and is slidably connected to the valve core through hole.

[0010] Preferably, an inner rubber pad is fixedly installed between the rectangular sleeve and the bottom wall of the valve seat, and an upper sealing gasket is fixedly installed on the top surface of the rectangular sleeve.

[0011] Preferably, the bottom end of the upper sealing gasket extends between the inner rubber gasket and the valve plate, and the bottom end of the upper sealing gasket is fixedly installed on the inner surface of the inner rubber gasket.

[0012] Preferably, a valve cover is fixedly installed on the top of the valve seat, and a valve handle connecting rod is fixedly installed on the top of the valve plate. The valve handle connecting rod passes through the valve cover and is slidably connected to the valve cover.

[0013] Preferably, both the lower sealing gasket and the central sealing gasket are embedded in the valve body, and the central hole, the water passage hole, and the water passage chamber are connected.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model features a central sealing gasket with a valve core sealing chamber. Since the valve core sealing chamber has a frustum-shaped cross-section and the valve core's dimensions are matched with those of the valve core, the distance between the valve core sealing chamber wall and the valve core decreases sequentially as the valve core moves from top to bottom. This ensures that the central sealing gasket does not initially adhere to the valve core and cause wear. Once the valve core is fully inserted into the central sealing gasket, the inner surface of the central sealing gasket adheres to the valve core, completing the sealing operation and achieving a wear-resistant and highly efficient sealing effect.

[0016] 2. The lower sealing gasket of this utility model can support the central sealing gasket, making the structure of the central sealing gasket more solid and stable, and less likely to fall off due to friction with the valve core. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the rectangular sleeve of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the central sealing gasket of this utility model;

[0020] The meanings of the labels in the diagram are as follows:

[0021] 1. Valve body; 10. Water passage chamber; 11. Valve seat; 12. Inner rubber gasket; 13. Rectangular sleeve; 131. Valve core through hole; 14. Upper sealing gasket; 15. Valve cover;

[0022] 2. Valve handle connecting rod; 20. Valve plate; 21. Valve core;

[0023] 3. Lower sealing gasket; 30. Center hole;

[0024] 4. Central sealing gasket; 40. Water passage hole; 41. Valve core sealing chamber; 42. Bottom insertion chamber. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-3 This utility model provides a technical solution: a high-efficiency sealing knife gate valve structure, including a valve body 1, a water passage chamber 10 is provided inside the valve body 1, a valve seat 11 is provided on the top of the valve body 1, two symmetrical lower sealing gaskets 3 are fixedly installed on the inner wall of the valve body 1, and a central sealing gasket 4 is provided between the two lower sealing gaskets 3. The lower sealing gaskets 3 and the central sealing gasket 4 are both embedded in the valve body 1, ensuring that the structure of the lower sealing gaskets 3 and the central sealing gasket 4 is more firm and stable, and is not prone to loosening.

[0027] Specifically, a valve core sealing chamber 41 is provided at the center of the central sealing gasket 4. The top of the valve core sealing chamber 41 is connected to the outside. A bottom insertion chamber 42 is provided on the bottom wall of the valve core sealing chamber 41. The bottom end of the bottom insertion chamber 42 extends into the bottom gasket of the central sealing gasket 4. The cross-section of the valve core sealing chamber 41 is frustoconical. A valve core 21 is inserted and fitted inside the valve core sealing chamber 41. A valve plate 20 is fixedly installed on the top of the valve core 21. The dimensions of the valve core 21 are consistent with those of the valve core sealing chamber 41. The dimensions of the sealing chamber 41 are matched to ensure that, during use, as the valve core 21 moves upward, the vertical distance between the valve core 21 and the valve core sealing chamber 41 increases, making it less prone to wear between the valve core 21 and the central sealing gasket 4. As the valve core 21 moves downward, the vertical distance between the valve core 21 and the valve core sealing chamber 41 decreases. When the valve core 21 is fully inserted into the central sealing gasket 4, the inner surface of the central sealing gasket 4 adheres to the surface of the valve core 21, thus achieving a sealing operation.

[0028] In this embodiment, a water passage hole 40 is provided at the center of the central sealing gasket 4, and both ends of the water passage hole 40 are connected to the outside; a central hole 30 is provided at the center of the lower sealing gasket 3, and the size of the central hole 30 is equal to the size of the water passage hole 40; the central hole 30, the water passage hole 40 and the water passage chamber 10 are connected to each other for normal water outflow operation.

[0029] Specifically, a rectangular sleeve 13 is fixedly installed on the inner wall of the valve seat 11. A valve core through hole 131 is provided in the rectangular sleeve 13. The valve plate 20 passes through the valve core through hole 131 and is slidably connected to the valve core through hole 131 to guide the movement of the valve plate 20.

[0030] Furthermore, an inner rubber pad 12 is fixedly installed between the rectangular sleeve 13 and the bottom wall of the valve seat 11, and an upper sealing gasket 14 is fixedly installed on the top surface of the rectangular sleeve 13; the bottom end of the upper sealing gasket 14 extends between the inner rubber pad 12 and the valve plate 20, and the bottom end of the upper sealing gasket 14 is fixedly installed on the inner surface of the inner rubber pad 12 to improve the sealing effect between it and the valve plate 20, making it less likely to leak.

[0031] In addition, a valve cover 15 is fixedly installed on the top of the valve seat 11, and a valve handle connecting rod 2 is fixedly installed on the top of the valve plate 20. The valve handle connecting rod 2 passes through the valve cover 15 and is slidably connected to the valve cover 15.

[0032] In use, the high-efficiency sealing gate valve structure of this utility model, as the valve core 21 moves upward, the valve core 21 disengages from the valve core sealing chamber 41. At this time, the vertical distance between the valve core 21 and the inner wall of the valve core sealing chamber 41 increases, making it less likely for wear to occur between the valve core 21 and the central sealing gasket 4. In addition, as the valve core 21 moves downward, the vertical distance between the valve core 21 and the valve core sealing chamber 41 decreases. When the valve core 21 is fully inserted into the central sealing gasket 4, the inner surface of the central sealing gasket 4 adheres to the surface of the valve core 21, thus achieving a sealing operation.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency sealing knife gate valve structure, comprising a valve body (1), characterized in that: The valve body (1) is provided with a water passage chamber (10), and a valve seat (11) is provided on the top of the valve body (1). Two symmetrical lower sealing gaskets (3) are fixedly installed on the inner wall of the valve body (1). A central sealing gasket (4) is provided between the two lower sealing gaskets (3). A valve core sealing chamber (41) is provided at the center of the central sealing gasket (4). The top of the valve core sealing chamber (41) is connected to the outside. A bottom insertion chamber (42) is provided on the bottom wall of the valve core sealing chamber (41). The bottom end of the bottom insertion chamber (42) extends into the bottom gasket of the central sealing gasket (4). The cross-section of the valve core sealing chamber (41) is frustum-shaped. A valve core (21) is inserted and fitted inside the valve core sealing chamber (41). A valve plate (20) is fixedly installed on the top of the valve core (21). The size of the valve core (21) is adapted to the size of the valve core sealing chamber (41).

2. The high-efficiency sealing knife gate valve structure according to claim 1, characterized in that: A water passage hole (40) is provided at the center of the central sealing gasket (4), and both ends of the water passage hole (40) are connected to the outside.

3. The high-efficiency sealing knife gate valve structure according to claim 2, characterized in that: The lower sealing gasket (3) has a central hole (30) at its center, and the size of the central hole (30) is equal to the size of the water passage hole (40).

4. The high-efficiency sealing knife gate valve structure according to claim 1, characterized in that: A rectangular sleeve (13) is fixedly installed on the inner wall of the valve seat (11). A valve core through hole (131) is provided in the rectangular sleeve (13). The valve plate (20) passes through the valve core through hole (131) and is slidably connected to the valve core through hole (131).

5. The high-efficiency sealing knife gate valve structure according to claim 4, characterized in that: An inner rubber pad (12) is fixedly installed between the rectangular sleeve (13) and the bottom wall of the valve seat (11), and an upper sealing gasket (14) is fixedly installed on the top surface of the rectangular sleeve (13).

6. The high-efficiency sealing knife gate valve structure according to claim 5, characterized in that: The bottom end of the upper sealing gasket (14) extends between the inner rubber pad (12) and the valve plate (20), and the bottom end of the upper sealing gasket (14) is fixedly installed on the inner surface of the inner rubber pad (12).

7. The high-efficiency sealing gate valve structure according to claim 1, characterized in that: A valve cover (15) is fixedly installed on the top of the valve seat (11), and a valve handle connecting rod (2) is fixedly installed on the top of the valve plate (20). The valve handle connecting rod (2) passes through the valve cover (15) and is slidably connected to the valve cover (15).

8. The high-efficiency sealing knife gate valve structure according to claim 3, characterized in that: The lower sealing gasket (3) and the central sealing gasket (4) are both embedded in the valve body (1), and the central hole (30), the water passage hole (40) and the water passage chamber (10) are connected.

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