Pneumatic butterfly valve convenient to install

Abstract

The utility model discloses a pneumatic butterfly valve convenient to install, and belongs to the technical field of pneumatic butterfly valves, the pneumatic butterfly valve convenient to install comprises a valve body, a valve plate and a pneumatic actuator, the inner wall of the valve body is connected with two arc-shaped sealing gaskets, the sides, located on the valve plate, of two supporting frames are connected with sealing rings, the outer portion of a guide rod is sleeved with a spring, and the outer portion of the guide rod is connected with the pneumatic actuator. The inner wall of the first base is rotationally connected with a connecting rod, the inner wall of the supporting frame is connected with a second base, the sealing ring, the supporting frame, the connecting rod and the spring are matched, supporting force is provided for the sealing ring through the supporting frame, the sealing ring is prevented from being scoured and deformed by flowing of a medium, and pushing force is provided for the supporting frame through the connecting rod; the supporting frame is pushed by the connecting rod to move to drive the sealing ring to be separated from the valve plate, contact strength exists between the sealing ring and the valve plate through elastic pushing force of the spring, a gap between the valve plate and the valve body can be better filled with the sealing ring, and the sealing performance of the pneumatic butterfly valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic butterfly valves, in particular to a pneumatic butterfly valve which is easy to install. Background Art

[0002] A pneumatic butterfly valve is a valve that uses compressed air as a power source and a pneumatic actuator as a power source to drive the butterfly plate to rotate, thereby opening, closing, or adjusting the opening angle of the valve. This valve has a simple structure, small size, light weight, and good fluid control characteristics. Pneumatic butterfly valves are suitable for food, chemical, petroleum, electricity and other fields. They can be used for multiple functions such as cutting off, regulating flow or emergency shut-off. They usually have two types of soft seals and hard seals to meet the sealing requirements under different working conditions.

[0003] Most existing pneumatic butterfly valves fix multiple layers of soft and hard sealing rings on the valve plate. When the valve plate is in the normally open state, the medium forms a positive scouring on its sealing surface. Over time, the multiple layers of soft and hard sealing rings may be worn or deformed, which may affect the sealing performance and cause leakage of the flowing medium. In order to solve this technical problem, the utility model proposes a pneumatic butterfly valve that is easy to install. Utility Model Content

[0004] The main purpose of the utility model is to provide a pneumatic butterfly valve that is easy to install and can effectively solve the problems mentioned in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] The cam is connected to the valve body by a spring, and the cam is connected to the valve body by a spring.

[0007] Preferably, a rotating shaft is connected to the inner side of the valve plate, and the rotating shaft is rotatably connected to the inner wall of the valve body.

[0008] Preferably, the pneumatic actuator is installed above the valve body, and the output end of the pneumatic actuator is connected to one end of the rotating shaft.

[0009] Preferably, one end of the spring is connected to one side of the support seat, and the other end of the spring is connected to one side of the support frame.

[0010] Preferably, two sealing grooves are provided on the inner side of the valve plate, and the two sealing grooves are symmetrical to each other, and the inner walls of the sealing grooves are in contact with the arc-shaped sealing gasket.

[0011] Preferably, both ends of the valve body are connected to flanges, a plurality of connecting grooves are provided on the inner side of the flange, and the plurality of connecting grooves are arranged in a circular array, and one side of the flange is connected to a hexagonal clamp having the same number as the connecting grooves.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The present invention relates to a pneumatic butterfly valve which is a pneumatic device for operating a pneumatic valve, wherein the pneumatic valve is installed in a pneumatic manner and the pneumatic valve body is installed in a pneumatic manner. The pneumatic valve body is installed in a pneumatic manner and the pneumatic valve body is installed in a pneumatic manner. The pneumatic valve body is installed in a pneumatic manner and the pneumatic valve body is installed in a pneumatic manner.

[0014] In the utility model, the hexagonal clamp and the connecting groove cooperate to wrap the hexagonal head of the bolt through the hexagonal clamp to prevent rotation when tightening the bolt, which is convenient for installing the pneumatic butterfly valve. There is no need to use a wrench to maintain the stability of the bolt. The hexagonal clamp only needs to limit the rotation of the bolt, which is convenient for tightening the bolt connecting the pneumatic butterfly valve and improves the installation convenience of the pneumatic butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a pneumatic butterfly valve that is easy to install in the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of a valve body in a pneumatic butterfly valve that is easy to install in the utility model;

[0017] Figure 3 This is a schematic diagram of the main structure of a pneumatic butterfly valve that is easy to install in the utility model;

[0018] Figure 4 This is a schematic diagram of the overall three-dimensional structure of a valve plate in a pneumatic butterfly valve that is easy to install in the utility model;

[0019] Figure 5 The utility model is a schematic diagram of the internal structure of the valve body of a pneumatic butterfly valve that is easy to install.

[0020] In the figure: 1. Valve body; 2. Valve plate; 3. Pneumatic actuator; 4. Arc sealing gasket; 5. Sealing ring; 6. Support seat; 7. Guide rod; 8. Spring; 9. Base 1; 10. Connecting rod; 11. Base 2; 12. Rotating shaft; 13. Sealing groove; 14. Flange; 15. Connecting groove; 16. Hexagonal clamp; 17. Support frame. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] like Figure 1-5 As shown, a pneumatic butterfly valve that is easy to install includes a valve body 1, a valve plate 2 and a pneumatic actuator 3. The valve plate 2 is arranged inside the valve body 1. The inner wall of the valve body 1 is connected to two arc-shaped sealing gaskets 4, and the two arc-shaped sealing gaskets 4 are symmetrical. Two sealing grooves 13 are provided on the inner side of the valve plate 2, and the two sealing grooves 13 are symmetrical. The inner wall of the sealing groove 13 is in contact with the arc-shaped sealing gasket 4. After the valve plate 2 rotates, the arc-shaped sealing gasket 4 is squeezed, and the arc-shaped sealing gasket 4 will be deformed. The arc-shaped sealing gasket 4 is wrapped by the sealing groove 13 to improve the sealing effect. The arc-shaped sealing gasket 4 and the sealing ring 5 are made of rubber, and rubber has good ductility and corrosion resistance.

[0023] The inner wall of the valve body 1 is slidably connected to two support frames 17. The two support frames 17 are located on one side of the valve plate 2 and are connected to a sealing ring 5. The other side of the sealing ring 5 is in contact with the outer surface of the valve plate 2. The inner wall of the valve body 1 is connected to multiple support seats 6. There are multiple support seats 6 in a circular array. One side of the multiple support seats 6 is connected to a guide rod 7. The outer surface of the guide rod 7 is slidably connected to the inner wall of the support frame 17. The guide rod 7 provides supporting force for the spring 8 and the support frame 17. When the spring 8 elastically contracts, it will be deformed. In order to prevent the spring 8 from deforming and getting out of contact with the support frame 17, the guide rod 7 is used to support and maintain the stability of the spring 8. The guide rod 7 guides the direction of movement of the support frame 17 to maintain the stability of the support frame 17 when it is in a moving position.

[0024] A spring 8 is sleeved on the outside of the guide rod 7, one end of the spring 8 is connected to one side of the support seat 6, and the other end of the spring 8 is connected to one side of the support frame 17. The spring 8 provides an elastic driving force for the support frame 17 to push the support frame 17 to move its position. The support frame 17 is pushed by the spring 8 to provide a thrust for the sealing ring 5, so that the sealing ring 5 maintains a tight contact force with the valve plate 2.

[0025] Both sides of the valve plate 2 are connected to the base 19, and the inner wall of the base 19 is rotatably connected to the connecting rod 10. The inner wall of the support frame 17 is connected to the base 2 11. The inner wall of the base 2 11 is rotatably connected to the other end of the connecting rod 10, and the power generated by the swinging of the valve plate 2 is transmitted to the support frame 17 through the connecting rod 10, driving the support frame 17 to move its position. When the valve plate 2 swings outward, the pneumatic butterfly valve is opened, and at the same time, the connecting rod 10 drives the support frame 17 to move outward. When the support frame 17 moves, the sealing ring 5 is driven to break away from contact with the valve plate 2. When the valve plate 2 drives the connecting rod 10 to swing inward, the pneumatic butterfly valve is closed, and at the same time, the connecting rod 10 moves inward. The connecting rod 10 drives the sealing ring 5 to tightly contact the valve plate 2 through the support frame 17, thereby sealing the gap between the valve plate 2 and the valve body 1 and improving the sealing effect.

[0026] A rotating shaft 12 is connected to the inner side of the valve plate 2, and the rotating shaft 12 is rotatably connected to the inner wall of the valve body 1. The rotating shaft 12 provides support for the valve plate 2, and the rotating shaft 12 maintains the stability of the valve plate 2 during rotation. The valve plate 2 receives power from the pneumatic actuator 3 through the rotating shaft 12. The pneumatic actuator 3 is installed above the valve body 1, and the output end of the pneumatic actuator 3 is connected to one end of the rotating shaft 12. The rotating shaft 12 is powered by the pneumatic actuator 3 to push the rotating shaft 12 to rotate, and the opening and closing of the valve plate 2 are achieved by the rotation of the rotating shaft 12.

[0027] Both ends of the valve body 1 are connected to a flange 14, and a plurality of connecting grooves 15 are opened on the inner side of the flange 14, and the plurality of connecting grooves 15 are arranged in a circular array. One side of the flange 14 is connected to a hexagonal clamp 16 equal to the number of the connecting grooves 15. Bolts are passed through the connecting grooves 15, and the hexagonal head of the bolt is wrapped by the hexagonal clamp 16 to prevent rotation when tightening the bolt, which facilitates the installation of the pneumatic butterfly valve. Traditionally, two wrenches are mostly used, one wrench fixes the hexagonal head and the other wrench rotates the nut, which requires two hands to cooperate at the same time, which is very inconvenient to tighten the bolts connecting the pneumatic butterfly valve.

[0028] It should be noted that, in actual use, the device first closes the pneumatic butterfly valve, starts the pneumatic actuator 3, and the pneumatic actuator 3 pushes the rotating shaft 12 to rotate. When the rotating shaft 12 rotates, the valve body 1 is driven to rotate. Then the sealing groove 13 contacts the arc-shaped sealing gasket 4, and the sealing groove 13 squeezes the arc-shaped sealing gasket 4, so that the arc-shaped sealing gasket 4 seals the gap between the valve plate 2 and the valve body 1. When the valve plate 2 flips, the connecting rod 10 is driven to move its position. At the same time, the connecting rod 10 drives the support frame 17 and the sealing ring 5 to move toward the position of the valve plate 2. Then, when the valve plate 2 flips to the angle of closing the pneumatic butterfly valve, the sealing ring 5 is tightly pushed into contact with the valve by the elasticity of the spring 8, and the gap between the valve plate 2 and the valve body 1 is sealed again. The same operation is performed in reverse when opening the pneumatic butterfly valve.

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A pneumatic butterfly valve that is easy to install, comprising a valve body (1), a valve plate (2) and a pneumatic actuator (3), characterized in that: The valve plate (2) is arranged inside the valve body (1), the inner wall of the valve body (1) is connected to two arc-shaped sealing gaskets (4), and the two arc-shaped sealing gaskets (4) are symmetrical. The inner wall of the valve body (1) is slidably connected to two support frames (17), and the two support frames (17) are located on one side of the valve plate (2) and are connected to a sealing ring (5), and the other side of the sealing ring (5) is in contact with the outer surface of the valve plate (2). The inner wall of the valve body (1) is connected to a plurality of support seats (6), and the plurality of support seats ( 6) a circular array, one side of each of the plurality of support seats (6) is connected to a guide rod (7), the outer surface of the guide rod (7) is slidably connected to the inner wall of the support frame (17), the outer portion of the guide rod (7) is sleeved with a spring (8), both sides of the valve plate (2) are connected to a base 1 (9), the inner wall of the base 1 (9) is rotatably connected to a connecting rod (10), the inner wall of the support frame (17) is connected to a base 2 (11), and the inner wall of the base 2 (11) is rotatably connected to the other end of the connecting rod (10).

2. The pneumatic butterfly valve that is easy to install according to claim 1 is characterized in that: The inner side of the valve plate (2) is connected to a rotating shaft (12), and the rotating shaft (12) is rotatably connected to the inner wall of the valve body (1).

3. The pneumatic butterfly valve that is easy to install according to claim 2 is characterized in that: The pneumatic actuator (3) is installed above the valve body (1), and the output end of the pneumatic actuator (3) is connected to one end of the rotating shaft (12).

4. The pneumatic butterfly valve that is easy to install according to claim 1 is characterized in that: One end of the spring (8) is connected to one side of the support seat (6), and the other end of the spring (8) is connected to one side of the support frame (17).

5. The pneumatic butterfly valve that is easy to install according to claim 1 is characterized in that: Two sealing grooves (13) are provided on the inner side of the valve plate (2), and the two sealing grooves (13) are symmetrical to each other. The inner walls of the sealing grooves (13) are in contact with the arc-shaped sealing gasket (4).

6. The pneumatic butterfly valve that is easy to install according to claim 1, characterized in that: Both ends of the valve body (1) are connected to flanges (14), the inner side of the flange (14) is provided with a plurality of connecting grooves (15), and the plurality of connecting grooves (15) are arranged in a circular array, and one side of the flange (14) is connected to hexagonal clamps (16) equal in number to the connecting grooves (15).

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