Leak-proof pneumatic butterfly valve

Abstract

The utility model relates to the technical field of valves, and discloses a leakproof pneumatic butterfly valve which comprises a valve body, an air cylinder is fixedly connected to the outer wall of the valve body, the output end of the air cylinder is fixedly connected with a first rotating shaft, a first valve plate is fixedly connected to the side wall of the first rotating shaft, and a leakproof assembly is arranged on the inner wall of the valve body. According to the leakproof pneumatic butterfly valve, double sealing of the butterfly valve is achieved through combination of the first valve plate and the second valve plate, the leakproof performance of the valve is enhanced, the risk of leakage is reduced, meanwhile, the first valve plate and the second valve plate are arranged in a 90-degree mode and can cope with impact force of liquid at different angles, and then good operation of a sealing assembly in different environments is achieved; and when the second valve plate is closed, the elasticity of the spring pushes the arc-shaped sealing piece to be clamped with the clamping groove, the sealing performance of the butterfly valve is further improved, the sealing pad abuts against the inner wall of the valve body all the time under the elastic effect of the elastic piece, and the abrasion resistance of the butterfly valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a leakage-proof pneumatic butterfly valve. Background Art

[0002] The pneumatic butterfly valve is composed of a pneumatic actuator and a butterfly valve. Its working principle is to realize the opening and closing function by rotating the circular butterfly plate through the valve stem. The pneumatic butterfly valve is mainly used for the operation of the shut-off valve, and can also be designed to have the function of regulation or section valve and regulation. Its main advantages are simple structure, small size, light weight and low cost, which are particularly prominent.

[0003] However, during the long-term use of the above-mentioned butterfly valve, friction will cause wear of the butterfly plate and the inner wall of the valve body. Due to the friction and wear, the sealing performance between the butterfly plate and the valve seat may decrease, causing it to lose its original sealing performance, thereby causing leakage. In view of this, we propose a leakage-proof pneumatic butterfly valve. Utility Model Content

[0004] The utility model aims to provide a leakage-proof pneumatic butterfly valve to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-leakage pneumatic butterfly valve, comprising a valve body, the outer wall of the valve body is fixedly connected to a cylinder, the output end of the cylinder is fixedly connected to a rotating shaft 1, the side wall of the rotating shaft 1 is fixedly connected to a valve plate 1, the inner wall of the valve body is provided with an anti-leakage component, and the anti-leakage component comprises:

[0006] Valve plate 2, the inner wall of the valve body is rotatably connected to the rotating shaft 2, and the side wall of the rotating shaft 2 is fixedly connected to the valve plate 2;

[0007] A movable frame, wherein the inner wall of the valve body is provided with a slide groove, wherein the slide groove is slidably connected to the movable frame, wherein the movable frame is slidably connected to a connecting rod, wherein one end of the connecting rod away from the movable frame is hinged to a valve plate 1, wherein the movable frame is slidably connected to a connecting rod, wherein one end of the connecting rod away from the movable frame is hinged to a valve plate 2;

[0008] An arc-shaped sealing member, wherein the inner wall of the valve body is provided with a mounting groove, the inner top surface of the mounting groove is fixedly connected with a spring, and one end of the spring away from the inner top surface of the mounting groove is fixedly connected with the arc-shaped sealing member;

[0009] A card slot is provided on the side wall of the second valve plate.

[0010] Preferably, a groove is formed on the side wall of the second valve plate, an elastic member is fixedly connected to the inner wall of the groove, and a sealing gasket is fixedly connected to one end of the elastic member away from the groove.

[0011] Preferably, the valve plate one and the valve plate two are distributed at 90 degrees, so as to achieve double sealing of the valve plate one and the valve plate two.

[0012] Preferably, the arc-shaped seal is snap-fitted with the slot, and an end of the arc-shaped seal away from the spring is provided with an arc-shaped chamfer.

[0013] Preferably, the axis of the sealing gasket coincides with the axis of the second rotating shaft, and the sealing gasket abuts against the valve body around the second rotating shaft, thereby offsetting the wear caused by long-term use of the valve body and the valve plate 2 and improving the sealing degree.

[0014] Preferably, a cross section of the sealing gasket coincides with a cross section of the groove, and the sealing gasket abuts against an inner wall of the valve body.

[0015] Compared with the prior art, the utility model provides a leak-proof pneumatic butterfly valve having the following features:

[0016] Beneficial effects:

[0017] 1. The leak-proof pneumatic butterfly valve realizes double sealing of the butterfly valve through the combination of valve plate 2, connecting rod, movable frame, connecting rod, spring and arc-shaped seal, valve plate 1 and valve plate 2, thereby enhancing the anti-leakage performance of the valve and reducing the risk of leakage. At the same time, valve plate 1 and valve plate 2 are arranged at 90 degrees, which can cope with the impact force of liquid at different angles, thereby realizing the good operation of the sealing component under different environments, improving the stability and sealing of the butterfly valve, and when valve plate 2 is closed, the elasticity of the spring pushes the arc-shaped seal to engage with the slot, further improving the sealing of the butterfly valve.

[0018] 2. The leak-proof pneumatic butterfly valve has an elastic member and a sealing gasket, and the sealing gasket is always in contact with the inner wall of the valve body under the elastic action of the elastic member, thereby avoiding damage to the sealing performance of the valve plate 2 due to long-term friction between the valve body and the valve plate 2, extending the service life of the butterfly valve and improving the wear resistance of the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the valve body of the utility model;

[0021] Figure 3 This is the second valve plate of the utility model; structural schematic diagram;

[0022] Figure 4 For this utility model Figure 3 Schematic diagram of the structure of area A.

[0023] In the figure: 1. valve body; 2. cylinder; 3. rotating shaft 1; 4. valve plate 1; 5. rotating shaft 2; 6. valve plate 2; 7. connecting rod; 8. movable frame; 9. slide groove; 10. connecting rod; 11. mounting groove; 12. spring; 13. arc sealing member; 14. slot; 15. groove; 16. elastic member; 17. sealing gasket. DETAILED DESCRIPTION

[0024] like Figure 1-Figure 4 As shown, the utility model provides a technical solution: a leakage-proof pneumatic butterfly valve, including a valve body 1, the outer wall of the valve body 1 is fixedly connected with a cylinder 2, the output end of the cylinder 2 is fixedly connected with a rotating shaft 3, the side wall of the rotating shaft 3 is fixedly connected with a valve plate 4, and the inner wall of the valve body 1 is provided with an anti-leakage component, the anti-leakage component includes a rotating shaft 5, a valve plate 6, a connecting rod 7, a movable frame 8, a slide groove 9, a connecting rod 10, an installation groove 11, a spring 12, an arc seal 13, a slot 14, a groove 15, an elastic member 16, and a sealing gasket 17.

[0025] In one embodiment of the utility model, the inner wall of the valve body 1 is rotatably connected with a rotating shaft 2 5, and the side wall of the rotating shaft 2 5 is fixedly connected with a valve plate 2 6. The valve plate 1 4 and the valve plate 2 6 are distributed at 90 degrees to achieve double sealing of the valve plate 1 4 and the valve plate 2 6. The inner wall of the valve body 1 is provided with a sliding groove 9, and the sliding groove 9 is slidably connected with the movable frame 8. The movable frame 8 is slidably connected with the connecting rod 7. The end of the connecting rod 7 away from the movable frame 8 is hinged to the valve plate 1 4, and the movable frame 8 is slidably connected with the connecting rod 10. The end of the connecting rod 10 away from the movable frame 8 is hinged to the valve plate 2 6. The inner wall of the valve body 1 is provided with a mounting groove 11, and the inner top surface of the mounting groove 11 is fixedly connected with a spring 12. The end of the spring 12 away from the inner top surface of the mounting groove 11 is fixedly connected to the arc-shaped sealing member 13. The valve plate 2 6 is provided with a card groove 14, and the arc seal 13 is engaged with the card groove 14. The end of the arc seal 13 away from the spring 12 is provided with an arc chamfer, so that the arc seal 13 will not affect the normal opening and closing of the valve plate 6. The side wall of the valve plate 6 is provided with a groove 15, and the inner wall of the groove 15 is fixedly connected with an elastic member 16, and the end of the elastic member 16 away from the groove 15 is fixedly connected with a sealing gasket 17, the axis of the sealing gasket 17 coincides with the axis of the rotating shaft 5, and the sealing gasket 17 abuts against the valve body 1 around the rotating shaft 5, thereby offsetting the wear caused by the long-term use of the valve body 1 and the valve plate 6, and improving the sealing degree. The cross-section of the sealing gasket 17 coincides with the cross-section of the groove 15, and the sealing gasket 17 abuts against the inner wall of the valve body 1.

[0026] The cylinder 2 drives the rotating shaft 3 to rotate, thereby driving the valve plate 4 to rotate, so that the valve plate 4 rotates counterclockwise and the valve plate 4 is expanded. The movement of the valve plate 4 drives the movable frame 8 to move rightward through the transmission of the connecting rod 7, and the movable frame 8 further drives the connecting rod 10 to move rightward, thereby pulling the valve plate 26 to expand the valve plate 26. Through the provided valve plate 14 and valve plate 26, the double sealing of the butterfly valve is achieved, the anti-leakage performance of the valve is enhanced, and the risk of leakage is reduced. At the same time, the valve plate 14 and the valve plate 26 are arranged at 90 degrees, which can cope with the impact force of liquids at different angles, thereby achieving good operation of the sealing component under different environments, and improving the stability and sealing of the butterfly valve. When the valve plate 4 rotates counterclockwise, the valve plate 14 and the valve plate 26 are closed, and the axis of the valve plate 26 coincides with the valve body 1. Under the elastic action of the spring 12, the arc seal 13 is pushed to engage with the card groove 14, further improving the sealing of the butterfly valve.

[0027] In addition, a groove 15 is provided on the side wall of the valve plate 26, and an elastic member 16 is fixedly connected to the inner wall of the groove 15. A sealing gasket 17 is fixedly connected to the end of the elastic member 16 away from the groove 15. Under the elastic action of the elastic member 16, the sealing gasket 17 always abuts against the inner wall of the valve body 1, thereby avoiding damage to the sealing performance of the valve plate 26 due to long-term friction between the valve body 1 and the valve plate 26, thereby extending the service life of the butterfly valve and improving the wear resistance of the butterfly valve.

[0028] In the utility model, when in use, under the transmission of the connecting rod 7, the movable frame 8 and the connecting rod 10, the valve plate 1 4 and the valve plate 2 6 can be linked, so that the valve plate 1 4 and the valve plate 2 6 can be opened or closed synchronously. When the valve plate 2 6 is closed, the spring 12 pushes the arc seal 13 to engage with the groove 14 on the valve plate 2 6, thereby reducing the reduction in sealing due to the friction between the valve plate 2 6 and the inner wall of the valve body 1, and further improving the sealing of the butterfly valve. Furthermore, under the elastic action of the elastic member 16, the sealing gasket 17 is always in contact with the inner wall of the valve body 1, thereby extending the service life of the butterfly valve and improving the wear resistance of the butterfly valve.

[0029] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A leak-proof pneumatic butterfly valve, comprising a valve body (1), the outer wall of the valve body (1) being fixedly connected to a cylinder (2), the output end of the cylinder (2) being fixedly connected to a rotating shaft (3), the side wall of the rotating shaft (3) being fixedly connected to a valve plate (4), characterized in that: The inner wall of the valve body (1) is provided with an anti-leakage component, and the anti-leakage component comprises: Valve plate 2 (6), the inner wall of the valve body (1) is rotatably connected to the rotating shaft 2 (5), and the side wall of the rotating shaft 2 (5) is fixedly connected to the valve plate 2 (6); A movable frame (8), the inner wall of the valve body (1) is provided with a slide groove (9), the slide groove (9) is slidably connected to the movable frame (8), the movable frame (8) is slidably connected to the connecting rod (7), the end of the connecting rod (7) away from the movable frame (8) is hinged to the valve plate one (4), the movable frame (8) is slidably connected to the connecting rod (10), and the end of the connecting rod (10) away from the movable frame (8) is hinged to the valve plate two (6); An arc-shaped sealing member (13), wherein the inner wall of the valve body (1) is provided with a mounting groove (11), the inner top surface of the mounting groove (11) is fixedly connected with a spring (12), and one end of the spring (12) away from the inner top surface of the mounting groove (11) is fixedly connected to the arc-shaped sealing member (13); A clamping groove (14), the side wall of the second valve plate (6) is provided with a clamping groove (14).

2. The anti-leakage pneumatic butterfly valve according to claim 1, characterized in that: The side wall of the second valve plate (6) is provided with a groove (15), the inner wall of the groove (15) is fixedly connected with an elastic member (16), and one end of the elastic member (16) away from the groove (15) is fixedly connected with a sealing gasket (17).

3. The anti-leakage pneumatic butterfly valve according to claim 1, characterized in that: The valve plate 1 (4) and the valve plate 2 (6) are arranged at 90 degrees.

4. The anti-leakage pneumatic butterfly valve according to claim 1, characterized in that: The arc-shaped sealing member (13) is clamped with the clamping groove (14), and an arc-shaped chamfer is formed at one end of the arc-shaped sealing member (13) away from the spring (12).

5. The anti-leakage pneumatic butterfly valve according to claim 2, characterized in that: The axis center of the sealing pad (17) coincides with the axis center of the second rotating shaft (5).

6. The anti-leakage pneumatic butterfly valve according to claim 2, characterized in that: The cross section of the sealing gasket (17) coincides with the cross section of the groove (15), and the sealing gasket (17) abuts against the inner wall of the valve body (1).

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