Novel pneumatic pipeline stop valve

Abstract

The utility model relates to a stop valve, in particular to a novel pneumatic pipeline stop valve which comprises a valve body, an upper valve body fixedly installed at the upper end of the valve body, a lower valve body installed at the lower end of the valve body, a stop mechanism arranged in the upper valve body and the lower valve body, a chock plug arranged at one end of the stop mechanism, and branch pipes communicated with the side walls of the two ends of the upper valve body. One end of a branch pipe is communicated with the upper valve body, the other end of the branch pipe is communicated with the lower valve body, a valve clack is arranged in the valve body, a sleeve is fixedly mounted in the middle of the valve clack, the branch pipe is arranged to connect the upper valve cavity with the lower valve cavity, and when a gas source introduces high-pressure gas into the upper valve cavity, a cut-off mechanism arranged in the upper valve body and the lower valve body pushes two adjacent chock plugs to approach each other; the two ends of the sleeve are plugged by the two adjacent chock plugs, so that the air tightness of the stop valve is improved, and the possibility of fluid leakage is further reduced.

Description

Technical Field

[0001] The utility model relates to a stop valve, in particular to a novel pneumatic pipeline stop valve. Background Art

[0002] With the continuous development of industrial automation, the demand for valves is also increasing, especially for fast, reliable and energy-saving valves. In this context, pneumatic pipeline stop valves came into being to meet the needs of the industrial field for fluid control. Pneumatic pipeline stop valves use pneumatic devices to drive the switch of valves, which are fast and reliable. They are widely used in industrial fields such as petroleum, chemical, electric power, metallurgy, papermaking, etc., and have become an indispensable part of fluid control systems. Pneumatic pipeline stop valves have better sealing performance and higher operating efficiency, so they are widely used in aviation, petroleum, chemical, energy and other industries. In recent years, with the rapid development of automation technology, more and more pneumatic pipeline stop valves have begun to adopt electric or pneumatic operation to achieve remote control and automatic management. Through the cooperation of sensors and actuators, real-time monitoring and operation of pneumatic pipeline stop valves can be realized to improve production efficiency and safety. Reduced sealing of pneumatic pipeline stop valves will cause fluid leakage in the pipeline, thereby affecting the normal flow of fluid in the equipment, and then leading to reduced equipment efficiency. Utility Model Content

[0003] The main purpose of the utility model is to provide a new type of pneumatic pipeline stop valve to solve the problem proposed in the related art that the reduced sealing of the pneumatic pipeline stop valve will cause fluid leakage in the pipeline, thereby affecting the normal flow of the fluid in the equipment, and further causing reduced equipment efficiency.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a new type of pneumatic pipeline stop valve is provided, including a valve body, an upper valve body is fixedly installed on the upper end of the valve body, a lower valve body is rotatably arranged at the lower end of the valve body, a stop mechanism is arranged in the upper valve body and the lower valve body, a plug is arranged at one end of the stop mechanism, side walls at both ends of the upper valve body are connected with branch pipes, and the other end of the branch pipe is connected with the lower valve body, and further includes:

[0005] A valve disc is arranged in the valve body, and a sleeve is fixedly installed in the middle of the valve disc. After high-pressure gas is introduced into the upper valve body, the cut-off mechanisms arranged in the upper valve body and the lower valve body push adjacent plugs toward each other and enter the sleeve through the branch pipe, so as to improve the sealing performance of the cut-off valve and reduce the possibility of fluid leakage.

[0006] Furthermore, the cut-off mechanism comprises a piston, a push rod is fixedly mounted on the lower surface of the piston, and the push rod is fixedly connected to the plug head.

[0007] Furthermore, the plug is arranged inside the valve body, the plug is adapted to the inner diameter of the sleeve, and the side wall of the plug is tightly fitted to the inner wall of the sleeve.

[0008] Furthermore, the piston divides the upper valve body into an upper valve chamber and an upper working chamber, the piston divides the lower valve body into a lower valve chamber and a lower working chamber, one end of the branch pipe is connected to the interior of the upper valve chamber, and the other end of the branch pipe is connected to the interior of the lower valve chamber.

[0009] Furthermore, the upper end of the upper valve body is fixedly connected to a gas source, the outer side wall of the piston in the upper valve body is fixedly connected to an indicator rod, and one end of the indicator rod is arranged outside the upper valve body.

[0010] Furthermore, a buffer portion is provided at one end of the valve body, the inner diameter of the buffer portion gradually decreases along the flow direction of the fluid, and the buffer portion is provided at the end where the fluid enters the valve body.

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

[0012] In this novel pneumatic pipeline stop valve, a branch pipe is arranged to connect the upper valve cavity with the lower valve cavity. When the gas source passes high-pressure gas into the upper valve cavity, the stop mechanism arranged in the upper valve body and the lower valve body will push the two adjacent plugs toward each other, so that the two adjacent plugs block the two ends of the sleeve, thereby increasing the air tightness of the stop valve and further avoiding leakage of the fluid in the stop valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the new pneumatic pipeline stop valve;

[0014] Figure 2 It is a structural schematic diagram of a semi-section view of a new type of pneumatic pipeline stop valve;

[0015] Figure 3 for Figure 2 Schematic diagram of the structure enlarged at point A in the middle.

[0016] Illustrations: 1. Valve body; 101. Upper valve body; 102. Lower valve body; 103. Plug; 104. Branch pipe; 105. Valve disc; 106. Sleeve; 107. Indicator rod; 108. Buffer part; 2. Shut-off mechanism; 201. Piston; 202. Push rod. DETAILED DESCRIPTION

[0017] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0018] See also Figure 1-Figure 3As shown, the purpose of this embodiment is to provide a new type of pneumatic pipeline stop valve, including a valve body 1, an upper valve body 101 is fixedly installed on the upper end of the valve body 1, and a lower valve body 102 is rotatably arranged at the lower end of the valve body 1, and a stop mechanism 2 is arranged in the upper valve body 101 and the lower valve body 102, and a plug 103 is arranged at one end of the stop mechanism 2, and the side walls at both ends of the upper valve body 101 are connected with a branch pipe 104, and the other end of the branch pipe 104 is connected with the lower valve body 102, and also includes:

[0019] A valve disc 105 is arranged in the valve body 1, and a sleeve 106 is fixedly installed in the middle of the valve disc 105. After high-pressure gas is introduced into the upper valve body 101, the shut-off mechanism 2 arranged in the upper valve body 101 and the lower valve body 102 pushes the adjacent plugs 103 toward each other and enters the sleeve 106 through the branch pipe 104, so as to improve the sealing performance of the shut-off valve and reduce the possibility of fluid leakage.

[0020] The cut-off mechanism 2 includes a piston 201, a push rod 202 is fixedly mounted on the lower surface of the piston 201, the push rod 202 is fixedly connected to the plug 103, the push rod 202 is sleeved with a spring, and the spring is arranged between the piston 201 and the plug 103. When the high-pressure gas stops flowing, the plug 103, the push rod 202 and the piston 201 are reset by the reaction force of the spring.

[0021] The plug 103 is arranged inside the valve body 1, and the plug 103 is adapted to the inner diameter of the sleeve 106. The side wall of the plug 103 fits tightly with the inner wall of the sleeve 106. When two adjacent plugs 103 approach each other, the two ends of the sleeve 106 are closed. The side wall of the plug 103 fits tightly with the inner wall of the sleeve 106 to improve the sealing performance of the plug 103 to the sleeve 106, thereby further avoiding fluid leakage.

[0022] The piston 201 divides the upper valve body 101 into an upper valve chamber and an upper working chamber, and the piston 201 divides the lower valve body 102 into a lower valve chamber and a lower working chamber. One end of the branch pipe 104 is connected to the interior of the upper valve chamber, and the other end of the branch pipe 104 is connected to the interior of the lower valve chamber. After the gas source passes high-pressure gas into the upper valve chamber, the high-pressure gas flows into the lower valve chamber through the branch pipe 104. Under the action of air pressure, the cut-off mechanism 2 in the upper valve body 101 and the lower valve body 102 drives the two adjacent plugs 103 to approach each other, thereby sealing the sleeve 106.

[0023] The upper end of the upper valve body 101 is fixedly connected to an air source, and the side wall of the piston 201 in the upper valve body 101 is fixedly connected to an indicator rod 107. One end of the indicator rod 107 is arranged outside the upper valve body 101, and a pointer is fixedly installed on the side wall of the indicator rod 107. By observing the pointer arranged on the surface of one end of the outer side of the indicator rod 107, it is convenient to judge the state of the stop valve.

[0024] A buffer portion 108 is provided at one end of the valve body 1, and the inner diameter of the buffer portion 108 gradually decreases along the direction of fluid flow. The buffer portion 108 is provided at the end where the fluid enters the valve body 1. By providing the buffer portion 108, the fluid flow area at the front end of the valve body 1 is expanded, and the flow resistance of the fluid is further reduced, which is used to reduce the influence of the valve body 1 on the fluid flow.

[0025] When the utility model is used in practice, when the fluid flows in the valve body 1, the gas source will pass the high-pressure gas into the upper valve cavity of the upper valve body 101, and at the same time, the high-pressure gas will pass into the lower valve cavity of the lower valve body 102 through the branch pipe 104, and then the piston 201 will approach each other under the pressure of the high-pressure gas, and then the push rod 202 will push the two adjacent plugs 103 to approach each other and block the sleeve 106. At this time, the plugs 103 at both ends of the sleeve 106 will double-cut off the fluid to prevent leakage of the fluid in the stop valve. At the same time, the buffer part 108 of the valve body 1 has a larger inner diameter, which reduces the flow rate of the fluid, and then reduces the influence of the valve body 1 on the flow rate of the fluid. Then, by observing the pointer on the indicator rod 107, the working state of the stop valve at this time can be judged.

[0026] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A new type of pneumatic pipeline stop valve, characterized in that: The invention comprises a valve body (1), an upper valve body (101) being fixedly mounted on the upper end of the valve body (1), a lower valve body (102) being rotatably mounted on the lower end of the valve body (1), a stopper mechanism (2) being arranged inside the upper valve body (101) and the lower valve body (102), a plug (103) being arranged at one end of the stopper mechanism (2), a branch pipe (104) being connected to the side walls at both ends of the upper valve body (101), the other end of the branch pipe (104) being connected to the lower valve body (102), and further comprising: A valve flap (105) is arranged in the valve body (1), and a sleeve (106) is fixedly installed in the middle of the valve flap (105). After high-pressure gas is introduced into the upper valve body (101), the stop mechanism (2) arranged in the upper valve body (101) and the lower valve body (102) pushes the adjacent plugs (103) toward each other and enters the sleeve (106) through the branch pipe (104), so as to improve the sealing performance of the stop valve and reduce the possibility of fluid leakage.

2. The novel pneumatic pipeline stop valve according to claim 1 is characterized in that: The cut-off mechanism (2) comprises a piston (201), a push rod (202) is fixedly mounted on the lower surface of the piston (201), and the push rod (202) is fixedly connected to the plug (103).

3. The novel pneumatic pipeline stop valve according to claim 2 is characterized in that: The plug (103) is arranged inside the valve body (1), the plug (103) is adapted to the inner diameter of the sleeve (106), and the side wall of the plug (103) is tightly fitted to the inner wall of the sleeve (106).

4. The novel pneumatic pipeline stop valve according to claim 3 is characterized in that: The piston (201) divides the upper valve body (101) into an upper valve chamber and an upper working chamber, and the piston (201) divides the lower valve body (102) into a lower valve chamber and a lower working chamber. One end of the branch pipe (104) is connected to the interior of the upper valve chamber, and the other end of the branch pipe (104) is connected to the interior of the lower valve chamber.

5. The novel pneumatic pipeline stop valve according to claim 4 is characterized in that: The upper end of the upper valve body (101) is fixedly connected to a gas source, and the side wall of the piston (201) in the upper valve body (101) is fixedly connected to an indicator rod (107), and one end of the indicator rod (107) is arranged outside the upper valve body (101).

6. The novel pneumatic pipeline stop valve according to claim 5 is characterized in that: A buffer portion (108) is provided at one end of the valve body (1), the inner diameter of the buffer portion (108) gradually decreases along the flow direction of the fluid, and the buffer portion (108) is provided at the end where the fluid enters the valve body (1).

Images