Inflatable butterfly valve

Abstract

The invention discloses an inflatable butterfly valve. The inflatable butterfly valve is provided with a valve seat, a valve shaft installed on the valve seat and a butterfly plate component. The valve seat is provided with a medium channel provided with a central line in the axial direction of the valve seat. The valve shaft is provided with a rotation axis which extends and passes through the central line. The butterfly plate component is fixed to the valve shaft and arranged inside the medium channel. An extension portion with a valve shaft installation channel arranged internally is arranged above the valve seat. A pneumatic actuator installation flange is arranged at the free end of the extension portion and provided with a pneumatic actuator, and a driving shaft of the pneumatic actuator is connected with the valve shaft. An annular embedding body made of an elastic material is embedded in the inner wall of the valve seat in the circumferential direction and provided with two embedded ends and a deformable portion, the two embedded ends are embedded into the valve seat, the deformable portion is arranged between the embedded ends and forms an inflatable cavity with the inner wall of the valve seat, and the inflatable cavity is communicated with an air inflation hole formed in the valve body. An air inflation hole of the pneumatic actuator and an air inflation hole of the valve body are connected with an external air source through magnetic valves. The inflatable butterfly valve has the advantages of being small in friction and torque, resistant to abrasion, long in service life and suitable for the field of the chemical industry.

Description

technical field [0001] The invention relates to a valve used in the chemical industry, in particular to an inflatable butterfly valve. Background technique [0002] The particularity of the working environment of the pneumatic conveying system determines that the valves used with it must meet the requirements of its working conditions. Butterfly valves are often used to cut off the conveying medium. For butterfly valves with rubber sealing structures, the operation is more inconvenient due to the large torque. Moreover, the long-term friction between the sealing structure and the valve body has a high degree of wear, which affects the sealing performance of the butterfly valve, and then affects the work of the entire delivery system. [0003] For the chemical industry, the butterfly plate is prone to friction during the opening and closing process and is likely to cause safety accidents, such as the explosion of the medium in the conveying system, which is quite dangerous. ...

AI Technical Summary

Problems solved by technology

[0002] The particularity of the working environment of the pneumatic conveying system determines that the valves used with it must meet the requirements of its working conditions. Butterfly valves are often used to cut off the conveying medium. For butterfly valves with rubber sealing structures, the operation is more inconvenient due to the large torque. In addition, the long-term friction between the sealing structure and the valve body is relatively high, which affects the sealing performance of the butterfly valve and thus affects the work of the entire conveying system.

[0003] For the chemical industry, the butterfly plate is prone to friction during the opening and closing process and is likely to cause safety accidents, such as the explosion of the medium in the conveying system, which is quite dangerous.

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