Self-driven air charging valve

Abstract

The invention provides a self-driven air charging valve, which comprises a valve body, a rubber valve seat and a butterfly plate, wherein the rubber valve seat is arranged in the valve body; the valvebody is provided with an air inlet communicated with an air bag cavity formed between the valve body and the rubber valve seat; an air cylinder is also arranged above the air inlet; the air cylinderis divided into an upper cavity and a lower cavity; the diameter of the upper cavity is larger than that of the lower cavity; the inside of the upper cavity is provided with an upper piston, the inside of the lower cavity is provided with a lower piston, and the upper piston is connected with the lower piston through a connecting rod; an air pipe is also arranged on a pipeline; the air pipe is divided into an upper path and a lower path; the upper path is provided with a regulating valve 1 communicated with the upper cavity of the air cylinder, the lower path is serially connected with the regulating valve 2, a solenoid valve 1 and a check valve which are communicated with the lower cavity of the air cylinder; and the upper cavity at the other side of the air cylinder is communicated withthe lower cavity through the air pipe, and the air pipe is provided with a solenoid valve 2. The self-driven air charging valve has the advantages that a certain gap is reserved among seal pairs in the process of opening and closing the valve to open and close the valve in the way of zero driving torque; and the air charging valve inflates air through the pressure of media in the pipeline withoutadditional energy sources.

Description

technical field [0001] The invention relates to a valve device, in particular to a rubber-lined butterfly valve. Background technique [0002] The sealing of the rubber-lined butterfly valves currently used in various industries is realized by the extrusion deformation between the rubber valve seat and the butterfly plate, the sealing interference is difficult to control, and the opening and closing torque is large. Contents of the invention [0003] In order to overcome the shortcomings of the existing rubber-lined butterfly valve, which are difficult to control the sealing interference and have a large opening and closing torque, the invention provides a butterfly valve without opening and closing torque. [0004] The technical solution adopted by the present invention to solve the technical problem is a self-operated inflatable valve, which includes a valve body, a rubber valve seat, and a butterfly plate. The rubber valve seat is installed in the valve body. It commun...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the existing rubber-lined butterfly valve sealing interference is difficult to control, the opening and closing torque is large, the present invention provides a butterfly valve without opening and closing torque

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