Quick-open type groove butterfly valve

Abstract

The utility model relates to the field of butterfly valves, in particular to a quick-opening type groove butterfly valve. The technical problem to be solved by the utility model is to provide a water flow impact force eliminating valve which can eliminate water flow impact force generated when the valve is quickly closed; the butterfly valve is prevented from being impacted by water flow, and the working stability and the service life of the butterfly valve are guaranteed. A quick-open type groove butterfly valve comprises a valve body, a connecting part, a mounting frame, a toothed plate, a handle, a valve rod, a butterfly plate, a sealing structure, a water hammer eliminating device, a pipe body, an air cavity, a piston, a sealing ring, a buffer plate, a spring and an air valve. According to the utility model, the water flow impact force generated during quick closing is eliminated; the butterfly valve is prevented from being impacted by water flow, and the working stability and the service life of the butterfly valve are guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of butterfly valves, in particular to a quick-opening groove butterfly valve. Background Art

[0002] The quick-opening butterfly valve, also called the handle butterfly valve, has a simple structure, small size, light weight, and is composed of only a few parts. It is easy to operate and can be opened and closed quickly. However, when the handle butterfly valve is used to quickly close the valve, the medium in the pipeline is quickly cut off. Due to the incompressibility of the liquid, the liquid in the pipeline will expand like a solid fixed cylinder, causing water hammer or water hammer phenomenon, causing problems such as strain and deformation of the valve parts, resulting in reduced valve sealing effect. Therefore, it is urgent to develop a quick-opening groove butterfly valve that can eliminate the impact force of the water flow generated during quick closing, avoid the butterfly valve from being impacted by the water flow, and ensure the working stability and service life of the butterfly valve. Utility Model Content

[0003] In order to overcome the shortcomings that when a handle butterfly valve is used to quickly close the valve, the medium in the pipeline is quickly cut off, water hammer or water hammer phenomenon occurs, causing valve parts to be strained and deformed, resulting in reduced valve sealing effect, the technical problem to be solved by the utility model is to provide a quick-opening groove butterfly valve that can eliminate the water flow impact force generated during rapid closing, avoid the butterfly valve from being impacted by water flow, and ensure the working stability and service life of the butterfly valve.

[0004] The utility model is achieved by the following specific technical means:

[0005] A quick-opening groove butterfly valve comprises a valve body, a water-through hole is arranged at the center of the valve body; a connecting part is fixedly arranged at one end of the outer diameter surface of the valve body; a mounting frame is fixedly arranged at the upper end of the connecting part, and a tooth plate is connected to the mounting frame; a handle is also arranged at the upper end of the tooth plate; a valve stem is arranged in the water-through hole arranged in the valve body, the valve stem is rotatably installed in the valve body through a shaft sleeve, and the upper end of the valve stem passes through the connecting part and is fixedly connected to the handle; a disc plate is also arranged in the water-through hole arranged in the valve body, and the disc plate is fixedly connected to the valve stem through a pin; a sealing structure is also arranged on one side of the disc plate, and the sealing structure is fixedly installed in the water-through hole of the valve body;

[0006] A connecting pipe connected to the water through hole of the valve body is also provided on the outer diameter surface of the valve body; a water hammer elimination device for eliminating the impact force of water flow is fixedly provided on the connecting pipe; the water hammer elimination device includes a tube body fixedly connected to the connecting pipe, and an air cavity is provided at the center of the tube body; a piston is slidably provided in the air cavity provided in the tube body; a sealing ring is fixedly provided on the outer diameter surface of the piston; a buffer plate is also provided on the side of the piston close to the connecting pipe; a spring is fixedly provided between the buffer plate and the piston.

[0007] Furthermore, an air valve for communicating with an air cavity provided in the tube body is also provided at the upper end of the tube body; gas can be filled into the air cavity through the air valve.

[0008] Furthermore, the buffer plate and the piston are respectively provided with fixing grooves on the opposite sides thereof for limiting and fixing the spring; the spring can be effectively fixed to prevent the spring from deflecting and ensure stable operation of the spring.

[0009] Furthermore, a sealing rubber pad is provided at the connection between the tube body and the connecting pipe to ensure the sealing effect and prevent water from leaking from the connection between the tube body and the connecting pipe.

[0010] Furthermore, an anti-escape shoulder for clamping the piston is provided in the air cavity of the tube body to prevent the pressurized gas in the air cavity from pushing the piston downward to squeeze the spring, causing the spring to lose its buffering effect.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The utility model eliminates the impact force of water flow generated during rapid closing, avoids the butterfly valve from being impacted by water flow, and ensures the working stability and service life of the butterfly valve.

[0013] By setting a water hammer elimination device on the outer diameter surface of the water inlet end of the butterfly valve body, the water flow impact force generated when the butterfly valve is quickly closed can be eliminated; the butterfly valve is prevented from being subjected to huge water flow impact, thereby ensuring the working stability and service life of the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the main structure of the utility model.

[0015] Figure 2 It is a cross-sectional structural schematic diagram of the utility model.

[0016] Figure 3 It is a partial cross-sectional structural schematic diagram of the utility model.

[0017] The markings in the accompanying drawings are: 1-valve body, 2-connecting part, 3-mounting frame, 4-tooth plate, 5-handle, 6-valve stem, 7-butterfly plate, 8-sealing structure, 9-water hammer elimination device, 91-tube body, 92-air cavity, 93-piston, 94-sealing ring, 95-buffer plate, 96-spring, 97-air valve. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings: Example

[0019] A quick-opening groove butterfly valve, such as Figure 1-3As shown, it comprises a valve body 1, a water-through hole is arranged at the center of the valve body 1; a connecting portion 2 is fixedly arranged at one end of the outer diameter surface of the valve body 1; a mounting frame 3 is fixedly arranged at the upper end of the connecting portion 2, and a tooth plate 4 is connected to the mounting frame 3; a handle 5 is also arranged at the upper end of the tooth plate 4; a valve stem 6 is arranged in the water-through hole of the valve body 1, the valve stem 6 is rotatably installed in the valve body 1 through a shaft sleeve, and the upper end of the valve stem 6 passes through the connecting portion 2 and is fixedly connected to the handle 5; a disc plate is also arranged in the water-through hole of the valve body 1, and the disc plate is fixedly connected to the valve stem 6 through a pin; a sealing structure 8 is also arranged on one side of the disc plate, and the sealing structure 8 is fixedly installed in the water-through hole of the valve body 1;

[0020] The outer diameter surface of the valve body 1 is also provided with a connecting pipe 11 connected with the water through hole provided on the valve body 1; a water hammer eliminating device 9 for eliminating the impact force of water flow is fixedly provided on the connecting pipe 11; the water hammer eliminating device 9 includes a tube body 91 fixedly connected with the connecting pipe 11, and an air cavity 92 is provided at the center of the tube body 91; a piston 93 is slidably provided in the air cavity 92 provided in the tube body 91; a sealing ring 94 is fixedly provided on the outer diameter surface of the piston 93; a buffer plate 95 is also provided on the side of the piston 93 close to the connecting pipe 11; a spring 96 is fixedly provided between the buffer plate 95 and the piston 93.

[0021] Working principle:

[0022] The utility model quick-opening groove butterfly valve can eliminate the water flow impact force generated when the butterfly valve is quickly closed by means of a water hammer eliminating device 9 arranged on the outer diameter surface of the water inlet end of the butterfly valve body 1, thereby preventing the butterfly valve from being impacted by huge water flow and ensuring the working stability and service life of the butterfly valve.

[0023] Before use, gas is injected into the air cavity 92 through the air valve 97 to form a pressurized state in the air cavity 92. When the butterfly valve is quickly closed, the inertia of the water flow causes the pressure of the water flow to increase sharply and impact forward. At this time, the water flow flows into the water hammer elimination device 9 from the connecting pipe 11. The water flow first impacts the buffer plate 95. The huge impact force of the water flow causes the buffer plate 95 to move upward. The spring 96 between the buffer plate 95 and the piston 93 buffers the water flow. Then the impact water flow acts on the piston 93, pushing the piston 93 to move toward the upper end of the air cavity 92. The stroke of the piston 93 is related to the gas pressure in the air cavity 92 and the size of the water hammer wave. Under the dual action of gas at a certain pressure and irregular water hammer, the piston 93 moves up and down to form a dynamic balance, effectively eliminating irregular water hammer wave oscillations; through the buffering of the buffer plate 95 and the spring 96 and the buffering of the pressurized gas in the air cavity 92, the irregular water hammer impact can be effectively alleviated or eliminated under the dual buffering action, ensuring the working stability and service life of the butterfly valve.

[0024] Although the present disclosure has been described in detail with reference to the exemplary embodiments, the present disclosure is not limited thereto, and it will be apparent to those skilled in the art that various modifications and changes may be made thereto without departing from the scope of the present disclosure.

Claims

1. A quick-opening groove butterfly valve, comprising a valve body (1), the center of the valve body (1) being provided with a water through hole; a connecting portion (2) being fixedly provided at one end of the outer diameter surface of the valve body (1); a mounting frame (3) being fixedly provided at the upper end of the connecting portion (2), the mounting frame (3) being connected with a tooth plate (4); a handle (5) being further provided at the upper end of the tooth plate (4); a valve stem (6) being provided in the water through hole provided in the valve body (1), the valve stem (6) being rotatably mounted in the valve body (1) through a shaft sleeve, and the upper end of the valve stem (6) passing through the connecting portion (2) and being fixedly connected to the handle (5); a disc plate being further provided in the water through hole provided in the valve body (1), the disc plate being fixedly connected to the valve stem (6) through a pin; a sealing structure (8) being further provided on one side of the disc plate, the sealing structure (8) being fixedly mounted in the water through hole of the valve body (1); It is characterized in that The outer diameter surface of the valve body (1) is also provided with a connecting pipe (11) which is in communication with the water through hole provided on the valve body (1); a water hammer eliminating device (9) for eliminating the impact force of water flow is fixedly provided on the connecting pipe (11); the water hammer eliminating device (9) comprises a pipe body (91) which is fixedly connected with the connecting pipe (11), and an air cavity (92) is provided at the center of the pipe body (91); a piston (93) is slidably provided in the air cavity (92) provided in the pipe body (91); a sealing ring (94) is fixedly provided on the outer diameter surface of the piston (93); a buffer plate (95) is also provided on the side of the piston (93) close to the connecting pipe (11); and a spring (96) is fixedly provided between the buffer plate (95) and the piston (93).

2. A quick-opening groove butterfly valve according to claim 1, characterized in that: The upper end of the tube body (91) is also provided with an air valve (97) for communicating with the air cavity (92) provided in the tube body (91).

3. A quick-opening groove butterfly valve according to claim 1, characterized in that: The buffer plate (95) and the piston (93) are respectively provided with fixing grooves on the opposite sides thereof for limiting and fixing the spring (96).

4. A quick-opening groove butterfly valve according to claim 1, characterized in that: A sealing rubber pad is provided at the connection between the tube body (91) and the connecting tube (11).

5. A quick-opening groove butterfly valve according to claim 1, characterized in that: An anti-slip shoulder for clamping the piston (93) is provided in the air cavity (92) provided in the tube body (91).

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