Gate valve

Abstract

The utility model relates to the technical field of gate valves, in particular to a gate valve which comprises a valve seat, the valve seat comprises a first shell and a second shell, a cavity is formed by the first shell and the second shell, a first valve port for a medium to pass through is formed in the first shell, and a second valve port for a medium to pass through is formed in the second shell; the second shell is provided with a second valve port for a medium to pass through, and the first valve port and the second valve port are oppositely arranged; the valve plate is arranged in the cavity, and a sealing ring is arranged on the first side of the valve plate; the first shell is arranged on the first side of the valve plate, the second shell is arranged on the second side of the valve plate, first anti-abrasion structures are arranged on the two sides of the first valve port, and a second anti-abrasion structure is arranged on the valve plate. And the first anti-abrasion structure and the second anti-abrasion structure are matched to prevent the sealing ring from generating relative displacement with the first shell in an extruded state.

Description

Technical Field

[0001] This disclosure relates to the field of gate valve technology, and in particular to a gate valve. Background Technology

[0002] A slide gate valve is a primary control device for the flow or conveying of powders, granules, pellets, and small pieces of material. It is widely used in industries such as metallurgy, mining, building materials, grain processing, and chemicals to control flow changes or quickly shut off flow. A slide gate valve typically consists of a valve plate with valve ports and a cavity within the valve seat, separated by the valve plate. The inlet and outlet ports are located on opposite sides of the valve plate. Generally, the valve plate moves perpendicular to the fluid direction, and the valve opens and closes through this movement. A sealing ring is installed on the valve plate; when the valve plate approaches the valve seat, the sealing ring is compressed, thus achieving a seal.

[0003] In existing slide gate valves, even after the sealing ring is compressed by the valve seat and valve plate, there is still a certain relative displacement between the sealing ring and the valve seat. This causes wear on the sealing ring, which over time will adversely affect the lifespan of the sealing ring and the sealing performance of the slide gate valve. Utility Model Content

[0004] In view of the shortcomings or problems existing in the prior art, this disclosure provides a slide gate valve with good sealing effect.

[0005] The technical solution adopted in this disclosure to solve the above-mentioned technical problem is: a slide gate valve, comprising:

[0006] The valve seat includes a first housing and a second housing, the first housing and the second housing forming a cavity, the first housing being provided with a first valve port for the medium to pass through, and the second housing being provided with a second valve port for the medium to pass through, the first valve port and the second valve port being disposed opposite to each other;

[0007] A valve plate is disposed within the cavity, and a sealing ring is provided on the first side of the valve plate.

[0008] The first housing is disposed on the first side of the valve plate, and the second housing is disposed on the second side of the valve plate. The first anti-wear structure is disposed on both sides of the first valve port, and the second anti-wear structure is disposed on the valve plate. The first anti-wear structure and the second anti-wear structure cooperate to prevent the sealing ring from being displaced relative to the first housing under the condition of being squeezed.

[0009] In a preferred embodiment, the first anti-wear structure is disposed on the inner side of the first housing, the first anti-wear structure is a first protrusion, and the second anti-wear structure is a second protrusion.

[0010] In a preferred embodiment, the first protrusion is an arc-shaped protrusion; the second protrusion is a long strip-shaped protrusion.

[0011] In a preferred embodiment, the valve plate is provided with an annular groove, the sealing ring is disposed in the annular groove, and protrusions extending outward are provided on both sides of the annular groove, with the second anti-wear structure disposed on the protrusions.

[0012] In a preferred embodiment, the first housing includes a first cover plate, with first wing plates respectively disposed on both sides of the first cover plate, a first side plate disposed at the first end of the first cover plate, and a first valve port and a first anti-wear structure disposed on the first cover plate; the second housing includes a second cover plate, with second wing plates respectively disposed on both sides of the second cover plate, a second side plate disposed at the first end of the second cover plate, and a second valve port disposed on the second cover plate; the end face of the first side plate contacts the end face of the second side plate, and the end face of the first wing plate contacts the end face of the second wing plate.

[0013] In a preferred embodiment, the end of the first wing plate closer to the first side plate is the first end, and the end farther from the first side plate is the second end, with the height of the first end of the first wing plate being lower than the height of the second end; the end of the second wing plate closer to the second side plate is the first end, and the end farther from the second side plate is the second end, with the height of the first end of the second wing plate being lower than the height of the second end, and the first shell and the second shell form a wedge-shaped structure.

[0014] In a preferred embodiment, a drive mechanism is also included, which is connected to the valve plate and is used to drive the valve plate to move. The valve plate is an inclined surface, and the slope of the inclined surface is adapted to the taper of the wedge structure. The height of the end of the valve plate away from the drive mechanism is lower than the height of the end close to the drive mechanism.

[0015] In a preferred embodiment, the drive mechanism includes a cylinder and a piston rod, one end of which is connected to a valve plate, and the other end of which is located in the cylinder.

[0016] In a preferred embodiment, the driving mechanism is an electric cylinder.

[0017] In a preferred embodiment, a flange assembly is provided on the outer side of the valve seat. The flange assembly includes a first flange and a second flange. The first flange is provided on the outer side of the first housing, and the second flange is provided on the outer side of the second housing. At least two first support plates are provided between the first flange and the second flange.

[0018] In a preferred embodiment, a first connecting sleeve is provided between the first flange and the first housing, and the first connecting sleeve is provided with a first through hole, the wall of the first through hole being flush with the inner wall of the first valve port.

[0019] In a preferred embodiment, a second connecting sleeve is provided between the second flange and the second housing. The second connecting sleeve is provided with a second through hole, and the wall of the second through hole is flush with the inner wall of the second valve port.

[0020] Compared with existing products, this application has a first anti-wear structure on both sides of the first valve port and a second anti-wear structure on the valve plate. The first and second anti-wear structures work together to prevent the sealing ring from shifting relative to the first housing under compression, thereby effectively reducing or even avoiding the wear of the sealing ring, thus improving the service life of the sealing ring and the sealing performance of the slide valve. Attached Figure Description

[0021] The present application will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0022] Figure 1 This is a schematic diagram of the structure of the slide gate valve disclosed in this paper;

[0023] Figure 2 This is a cross-sectional view of the slide gate valve disclosed herein;

[0024] Figure 3 This is one of the exploded views of the slide gate valve disclosed in this publication;

[0025] Figure 4 This is the second exploded view of the slide gate valve disclosed in this publication;

[0026] Figure 5 This is a public announcement Figure 4 A magnified view of a section at point A in the middle;

[0027] Figure 6 This is a schematic diagram of the structure of the first housing disclosed herein.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. First housing; 2. Second housing; 3. First flange; 4. Second flange; 5. Valve plate; 6. First anti-wear structure; 7. Second anti-wear structure; 8. Cylinder body; 9. Bellows; 10. First support plate; 11. Sealing ring; 12. First connecting sleeve; 13. Second connecting sleeve; 14. First through hole; 15. Second through hole; 16. First cover plate; 17. Second cover plate; 18. First valve port; 19. Protrusion. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solutions of this disclosure, the following detailed, clear, and complete description of this disclosure is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this disclosure and are not intended to limit it.

[0031] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation of this utility model.

[0032] Please refer to Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, this application provides a slide gate valve, including: a valve seat, the valve seat including a first housing 1 and a second housing 2, the first housing 1 and the second housing 2 forming a cavity, the first housing 1 being provided with a first valve port 18 for medium to pass through, the second housing 2 being provided with a second valve port for medium to pass through, the first valve port 18 and the second valve port being disposed opposite to each other; a valve plate 5, the valve plate 5 being disposed in the cavity, the first side of the valve plate 5 being provided with a sealing ring 11, the sealing ring 11 in this application being an O-ring; the first housing 1 being disposed on the first side of the valve plate 5, the second housing 2 being disposed on the second side of the valve plate 5, the first anti-wear structure 6 being provided on both sides of the first valve port 18, the valve plate 5 being provided with a second anti-wear structure 7, the first anti-wear structure 6 and the second anti-wear structure 7 cooperating to prevent the sealing ring 11 from being relatively displaced from the first housing 1 under the state of compression. Since the first anti-wear structure 6 is provided on both sides of the first valve port 18 and the second anti-wear structure 7 is provided on the valve plate 5, the first anti-wear structure 6 and the second anti-wear structure 7 work together to prevent the sealing ring 11 from being relatively displaced from the first housing 1 under the state of compression, thereby effectively reducing or even avoiding the wear of the sealing ring 11, thereby improving the service life of the sealing ring 11 and the sealing performance of the slide valve.

[0033] Specifically, the valve plate 5 has an annular groove, and the sealing ring 11 is disposed in the annular groove. Outwardly extending protrusions 19 are provided on both sides of the annular groove, and the second anti-wear structure 7 is disposed on the protrusions 19. The first anti-wear structure 6 is disposed on the inner side of the first housing 1, and the first anti-wear structure 6 is a first protrusion; the second anti-wear structure 7 is a second protrusion. During the movement of the valve plate 5 towards the first valve port 18 and the second valve port, the second protrusion will first contact the first protrusion. This ensures that before the valve plate 5 reaches its final position, a certain gap is maintained between the sealing ring 11 and the first housing 1. As the valve plate 5 continues to move, the second protrusion slides off the first protrusion. This effectively prevents the sealing ring 11 from undergoing relative displacement with the first housing 1 under compression, thus avoiding significant wear on the sealing ring 11. It should be noted that the valve plate 5 reaches its final position the instant the second protrusion slides off the first protrusion, at which point the sealing ring 11 is pressed tightly against the first housing 1 to achieve a seal.

[0034] Preferably, the first protrusion is an arc-shaped protrusion, and the second protrusion is an elongated protrusion. The arc-shaped first protrusion facilitates the sliding of the second protrusion along it, resulting in smoother contact between the two protrusions. This avoids jamming when the second protrusion enters the first protrusion and also prevents vibration and noise caused by a large height difference when the second protrusion leaves the first protrusion, thus ensuring the stable and reliable operation of the slide gate valve. It should be noted that this application does not specifically limit the height of the first and second protrusions. As long as the distance between the first cover plate 16 and the valve plate 5 after the first and second protrusions contact each other, the sealing ring 11 is not compressed by the first cover plate 16 before the valve plate 5 is in position, it is sufficient.

[0035] In one embodiment of this disclosure, the first housing 1 includes a first cover plate 16, with first wing plates respectively disposed on both sides of the first cover plate 16, and a first side plate disposed at the first end of the first cover plate 16. A first valve port 18 and a first anti-wear structure 6 are disposed on the first cover plate 16. The second housing 2 includes a second cover plate 17, with second wing plates respectively disposed on both sides of the second cover plate 17, and a second side plate disposed at the first end of the second cover plate 17. A second valve port is disposed on the second cover plate 17. The end face of the first side plate contacts the end face of the second side plate, and the end face of the first wing plate contacts the end face of the second wing plate. The end of the first wing plate closer to the first side plate is the first end, and the end farther from the first side plate is the second end. The height of the first end of the first wing plate is lower than the height of the second end. The end of the second wing plate closer to the second side plate is the first end, and the end farther from the second side plate is the second end. The height of the first end of the second wing plate is lower than the height of the second end. The first housing 1 and the second housing 2 form a wedge-shaped structure, and the cavity formed by the first housing 1 and the second housing 2 is a wedge-shaped cavity.

[0036] Furthermore, it also includes a drive mechanism, which is an electric cylinder connected to the valve plate 5. This drive mechanism drives the valve plate 5 to move. The valve plate 5 is an inclined surface, the slope of which is adapted to the taper of the wedge-shaped structure. The height of the end of the valve plate 5 furthest from the drive mechanism is lower than the height of the end closest to the drive mechanism. Specifically, the drive mechanism includes a cylinder body 8 and a piston rod. One end of the piston rod is connected to the valve plate 5, and the other end is located in the cylinder body 8. Under the drive of the drive mechanism, the valve plate 5 moves closer to or further away from the first valve port 18 to block the flow of the medium or to maintain the flow of the medium. Preferably, a bellows 9 is fitted around the piston rod. This serves two purposes: firstly, to seal the piston rod and the inside of the slide gate valve, providing a better seal than an O-ring; and secondly, to prevent foreign objects (such as dust) from falling onto the piston rod and entering the cylinder body 8 or the slide gate valve along with it.

[0037] like Figure 1 and Figure 3 As shown, a flange assembly is provided on the outer side of the valve seat. The flange assembly includes a first flange 3 and a second flange 4. The first flange 3 is located on the outer side of the first housing 1, and the second flange 4 is located on the outer side of the second housing 2. Three first support plates 10 are provided between the first flange 3 and the second flange 4. Specifically, the first support plates 10 are welded between the first flange 3 and the second flange 4 to limit the side of the wedge-shaped structure.

[0038] Please refer to the following: Figure 2 and Figure 3 As shown, further, a first connecting sleeve 12 is provided between the first flange 3 and the first housing 1. The first connecting sleeve 12 has a first through hole 14, the wall of which is flush with the inner wall of the first valve port 18. A second connecting sleeve 13 is provided between the second flange 4 and the second housing 2. The second connecting sleeve 13 has a second through hole 15, the wall of which is flush with the inner wall of the second valve port. It can be understood that the flush alignment of the first through hole 14 with the inner wall of the first valve port 18 and the second through hole 15 with the inner wall of the second valve port avoids dead angles at the contact points between the first connecting sleeve 12 and the first flange 3, and between the second connecting sleeve 13 and the second flange 4, thus preventing the flow of the medium from being affected. The connection relationships between the first connecting sleeve 12 and the first flange 3 and the first housing 1, and between the second connecting sleeve 13 and the second flange 4 and the second housing 2, are existing technologies and will not be described further here.

[0039] To enhance the support for the first flange 3 and the second flange 4, two second support plates are provided between the first housing 1 and the first flange 3, and two third support plates are provided between the second housing 2 and the second flange 4.

[0040] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A slide gate valve, characterized in that, include: The valve seat includes a first housing (1) and a second housing (2), the first housing (1) and the second housing (2) forming a cavity, the first housing (1) being provided with a first valve port (18) for the medium to pass through, and the second housing (2) being provided with a second valve port for the medium to pass through, the first valve port (18) and the second valve port being arranged opposite to each other; Valve plate (5), the valve plate (5) is disposed in the cavity, and a sealing ring (11) is provided on the first side of the valve plate (5); The first housing (1) is disposed on the first side of the valve plate (5), and the second housing (2) is disposed on the second side of the valve plate (5). The first anti-wear structure (6) is disposed on both sides of the first valve port (18), and the second anti-wear structure (7) is disposed on the valve plate (5). The first anti-wear structure (6) and the second anti-wear structure (7) cooperate to prevent the sealing ring (11) from being relatively displaced from the first housing (1) under the state of being squeezed.

2. The slide gate valve according to claim 1, characterized in that, The first anti-wear structure (6) is located on the inner side of the first housing (1). The first anti-wear structure (6) is a first protrusion, and the second anti-wear structure (7) is a second protrusion.

3. The slide gate valve according to claim 2, characterized in that, The first protrusion is an arc-shaped protrusion; the second protrusion is a long strip-shaped protrusion.

4. The slide gate valve according to claim 1, characterized in that, The valve plate (5) is provided with an annular groove, the sealing ring (11) is provided in the annular groove, and protrusions (19) extending outward are provided on both sides of the annular groove. The second anti-wear structure (7) is provided on the protrusions (19).

5. The slide gate valve according to claim 1, characterized in that, The first housing (1) includes a first cover plate (16), with first wing plates respectively provided on both sides of the first cover plate (16), a first side plate provided at the first end of the first cover plate (16), a first valve port (18) and a first anti-wear structure (6) provided on the first cover plate (16); the second housing (2) includes a second cover plate (17), with second wing plates respectively provided on both sides of the second cover plate (17), a second side plate provided at the first end of the second cover plate (17), and a second valve port provided on the second cover plate (17); the end face of the first side plate is in contact with the end face of the second side plate, and the end face of the first wing plate is in contact with the end face of the second wing plate.

6. The slide gate valve according to claim 5, characterized in that, The end of the first wing plate closest to the first side plate is the first end, and the end furthest from the first side plate is the second end. The height of the first end of the first wing plate is lower than the height of the second end. The end of the second wing plate closest to the second side plate is the first end, and the end furthest from the second side plate is the second end. The height of the first end of the second wing plate is lower than the height of the second end. The first shell (1) and the second shell (2) form a wedge-shaped structure.

7. The slide gate valve according to claim 6, characterized in that, It also includes a drive mechanism, which is connected to the valve plate (5) and is used to drive the valve plate (5) to move. The valve plate (5) is an inclined surface, and the slope of the inclined surface is adapted to the taper of the wedge structure. The height of the end of the valve plate (5) away from the drive mechanism is lower than the height of the end close to the drive mechanism.

8. The slide gate valve according to claim 1, characterized in that, A flange assembly is provided on the outside of the valve seat. The flange assembly includes a first flange (3) and a second flange (4). The first flange (3) is provided on the outside of the first housing (1), and the second flange (4) is provided on the outside of the second housing (2). At least two first support plates (10) are provided between the first flange (3) and the second flange (4).

9. The slide gate valve according to claim 8, characterized in that, A first connecting sleeve (12) is provided between the first flange (3) and the first housing (1). The first connecting sleeve (12) is provided with a first through hole (14). The wall of the first through hole (14) is flush with the inner wall of the first valve port (18).

10. The slide gate valve according to claim 8, characterized in that, A second connecting sleeve (13) is provided between the second flange (4) and the second housing (2). The second connecting sleeve (13) is provided with a second through hole (15), and the wall of the second through hole (15) is flush with the inner wall of the second valve port.

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