High-risk medium zero-leakage system based on pneumatic corrugated pipe stop valve

Abstract

The invention relates to the technical field of stop valves, in particular to a high-risk medium zero-leakage system based on a pneumatic corrugated pipe stop valve, which is characterized by comprising a central control unit and a valve body, the valve body is sealed by an alloy material and is provided with two standby chambers, namely an inlet chamber and an outlet chamber; the chambers are arranged at the joint of the stop valve and the inlet corrugated pipe, an oxygen concentration sensor is arranged in each chamber, and an air velocity sensor is arranged in the corrugated pipe; the central control unit judges the closing mode and the pressing pressure of the stop valve according to the air pressure in the outlet cavity, adjusts the preset oxygen concentration standard according to the temperature in the outlet cavity, adjusts the actual pressing force of the stop valve according to the expansion coefficient of the alloy sealing material, and controls the stop valve to be closed after the stop valve is pressed. The central control unit detects the gas flow rate and the oxygen concentration in the corrugated pipe in the outlet cavity, and if the central control unit judges that the pressure in the outlet cavity is too high and the stop valve needs to be closed, the air pressure and the oxygen concentration in the inlet cavity are detected. And the working efficiency of the system is improved.

Description

technical field [0001] The invention relates to the technical field of cut-off valves, in particular to a zero-leakage system for high-risk media based on a pneumatic bellows cut-off valve. Background technique [0002] The shut-off valve is a kind of pneumatic actuator in the automation system. It consists of a multi-spring pneumatic film pneumatic actuator or a floating piston pneumatic actuator and a regulating valve. It receives the signal from the regulating instrument and controls the fluid in the process pipeline. switch. It has the characteristics of simple structure, sensitive response and reliable action. Can be widely used in petroleum, chemical, metallurgy and other industrial production sectors. The air source of the pneumatic shut-off valve requires filtered compressed air, and the medium flowing through the valve body should be liquid and gas free of impurities and particles. According to the allowable pressure difference, the characteristics of the medium ...

AI Technical Summary

Problems solved by technology

[0006] For this reason, the present invention provides a high-risk medium zero-leakage system based on a pneumatic bellows shut-off valve to overcome the high-risk medium erosion of the shut-off valve in the prior art. , destroy the sealing surface, and lose the sealing

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