CN-224229265-U - Pneumatic welding anti-mixing butterfly valve

Abstract

The utility model discloses a pneumatic welding anti-mixing butterfly valve, which comprises a pneumatic actuator, wherein an air cylinder is fixedly arranged below the pneumatic actuator, a valve body is fixedly arranged below the air cylinder, welding ports are respectively and fixedly arranged at two ends of the valve body, an annular valve seat is arranged inside the valve body, a valve plate is rotatably arranged inside the annular valve seat, a first sealing filler is arranged between a flange of the outer wall of the valve plate and the annular valve seat, a valve rod is fixedly arranged inside the valve plate, one end of the valve rod penetrates through the valve body and the extending end of the valve rod is connected inside the air cylinder, a piston cylinder is slidably arranged inside the air cylinder, a spring is sleeved on the outer wall of the piston cylinder, a sealing ring is arranged between the valve body and the valve rod, a second sealing filler is arranged above the sealing ring, the valve rod penetrates through the valve body and the valve plate, and the valve plate adopts a double-eccentric structure design, so that the mixing of different media can be effectively prevented and the sealing performance of the valve plate can be improved.

Inventors

• YE BO
• SUN DEJING
• XIE HONGBIN

Assignees

• 温州天悦流体设备有限公司

Dates

Publication Date

20260512

Application Date

20250613

Claims (6)

1. 1. The utility model provides a pneumatic welding prevents mixing butterfly valve, its characterized in that, including pneumatic actuator (1), pneumatic actuator (1) below is fixed to be provided with cylinder (2), cylinder (2) below fixed mounting has valve body (3), valve body (3) both ends are fixed respectively and are provided with welded port (6), valve body (3) inside is provided with annular disk seat, annular disk seat inside rotates and installs valve plate (11), be provided with first sealing filler (12) between valve plate (11) outer wall flange department and the annular disk seat, valve plate (11) inside fixed mounting has valve rod (7), valve rod (7) one end runs through in valve body (3) inside and extends the end and connect inside cylinder (2), cylinder (2) inside slip is provided with piston cylinder (8), piston cylinder (8) outer wall cover is equipped with spring (9), be provided with sealing washer (13) and sealing washer (13) top between valve body (3) and valve rod (7) and second sealing filler (14).
2. 2. The pneumatic welding anti-mixing butterfly valve according to claim 1, wherein the valve rod (7) penetrates through the valve body (3) and the valve plate (11), the valve plate (11) adopts a double-eccentric structure design, the first sealing filler (12) is made of polytetrafluoroethylene materials, and the valve plate (11) is matched with the annular valve seat.
3. 3. The pneumatic welding anti-mixing butterfly valve according to claim 2, wherein the valve body (3) is located below the air cylinder (2), a sealing groove (15) is formed in the valve body, the sealing ring (13) is fixedly installed in the sealing groove (15), the second sealing filler (14) is made of flexible graphite materials, and the valve rod (7) is matched with the valve body (3) in position.
4. 4. The pneumatic welding anti-mixing butterfly valve according to claim 1, wherein one end of the spring (9) is arranged at the bottom of the air cylinder (2) and the other end of the spring is connected to the piston cylinder (8), guide rods are symmetrically arranged at the upper end of the piston cylinder (8), and guide grooves are formed in the piston cylinder (8).
5. 5. The pneumatic welding anti-mixing butterfly valve according to claim 4, wherein a limit rod (71) is fixedly arranged on the outer wall of the valve rod (7) and is slidably connected inside the guide groove, and a sliding sleeve (10) is fixedly arranged inside the valve body (3) at the sliding connection position of the valve rod (7).
6. 6. The pneumatic welding anti-mixing butterfly valve according to claim 1, wherein the outer wall of the valve body (3) is symmetrically provided with a joint (4) and a nut (5) is connected with the outer wall of the joint (4) in a threaded manner.

Description

Pneumatic welding anti-mixing butterfly valve Technical Field The utility model relates to the technical field of valves, in particular to a pneumatic welding anti-mixing butterfly valve. Background In the industrial production processes of chemical industry, pharmacy, food and the like, the transportation and control of fluids with various different properties are often required, and the mixing of different fluids is avoided, so that the influence on the quality of products, the initiation of chemical reactions and even safety accidents are prevented. The traditional butterfly valve has the defects when in use, the sealing performance of the butterfly valve is limited, the valve plate and the valve seat are easy to wear in the long-term use process, the sealing is invalid, different fluids are enabled to leak and mix, the use stability of the butterfly valve is affected, and the pneumatic welding anti-mixing butterfly valve is improved and upgraded according to the problems. Disclosure of utility model The utility model aims to provide a pneumatic welding anti-mixing butterfly valve, which aims to solve the problems in the background technology. In order to solve the problems, the technical scheme is that the pneumatic welding anti-mixing butterfly valve comprises a pneumatic actuator, an air cylinder is fixedly arranged below the pneumatic actuator, a valve body is fixedly arranged below the air cylinder, welding ports are fixedly arranged at two ends of the valve body respectively, an annular valve seat is arranged inside the valve body, a valve plate is rotatably arranged inside the annular valve seat, a first sealing filler is arranged between a flange of the outer wall of the valve plate and the annular valve seat, a valve rod is fixedly arranged inside the valve plate, one end of the valve rod penetrates through the valve body and the extending end of the valve rod is connected inside the air cylinder, a piston cylinder is slidably arranged inside the air cylinder, a spring is sleeved on the outer wall of the piston cylinder, a sealing ring is arranged between the valve body and the valve rod, and a second sealing filler is arranged above the sealing ring. As the optimization of the technical scheme, the valve rod penetrates through the valve body and the valve plate, the valve plate adopts a double-eccentric structure design, the first sealing filler is made of polytetrafluoroethylene and other materials, and the valve plate is matched with the annular valve seat. As the preference of above-mentioned technical scheme, the valve body is located cylinder below inside and has seted up the seal groove, sealing washer fixed mounting is inside the seal groove, the second sealing filler adopts flexible graphite material to make, valve rod and valve body position looks adaptation. As the optimization of the technical scheme, one end of the spring is arranged at the bottom of the air cylinder, the other end of the spring is connected to the piston cylinder, guide rods are symmetrically arranged at the upper end of the piston cylinder, and guide grooves are formed in the piston cylinder. As the optimization of the technical scheme, the limit rod is fixedly arranged on the outer wall of the valve rod and is in sliding connection with the guide groove, and the sliding sleeve is fixedly arranged at the sliding connection position of the valve rod in the valve body. As the optimization of the technical scheme, the outer wall of the valve body is symmetrically provided with the connectors, and nuts are connected to the outer wall of the connectors in a threaded mode. Compared with the prior art, the utility model has the beneficial effects that: 1. The valve plate, the first sealing filler, the second sealing filler, the sealing ring, the valve rod and other components are arranged in the device, the valve plate is of a double-eccentric structure, the valve is separated from the annular valve seat and then rotates when being opened, friction and abrasion are reduced, the edge sealing flange of the valve plate is tightly attached to the precisely machined valve seat when the valve is closed, the valve plate is matched with polytetrafluoroethylene materials on the outer side of the valve plate to realize effective sealing, fluid leakage and mixing are prevented, the valve rod is matched and sealed by adopting flexible graphite materials and the sealing ring, the fluid is prevented from leaking from the valve rod, the anti-mixing effect is further ensured, the valve plate is tightly attached to the valve seat, and the sealing piece has good performance, so that the valve can be reliably sealed in the long-term use process, and the possibility of fluid leakage is reduced. Meanwhile, the valve body adopts an integrated welding structure, welding ports are formed in two ends of the valve body and are used for being welded with a pipeline, seamless connection between the valve body and the pipeline can be ensured by the