Pressure regulating valve

Abstract

The invention discloses a pressure regulating valve. The body of the pressure regulating valve is provided with an air inlet and an air outlet. A valve cap is arranged under the body and the valve cap is provided with a pressure regulating choke plug. A pressure regulating seat is arranged on the upper surface of the body. The top end of the pressure regulating seat is a pressure regulating button. An elastic membrane body is arranged between the pressure regulating seat and the body. The central of the elastic membrane body is provided with a mebrane seat. The upper end of the mebrane is fixed with a mebrane and the lower end is provided with a guiding shaft. The central of the mebrane is a sealing cavity. The upper part of the sealing cavity is provided with a sealing plug with an air discharge hole. The upper part of the body is provided with a guiding cavity. The guiding shaft on the mabrane seat and the guiding cavity on the body form a moving pair. The invention effectively solves the problems exited in the current pressure regulating valve that the center of the mabrane is easy to deviate and the air flow is not stable enough. The invention has the advantages of reasonable design, stable air flow, good pressure regulating effect and long service life. The quality of the pressure regulating valve has been improved remarkably.

Description

technical field [0001] The invention relates to a pressure regulating device for automatically regulating gas pressure, in particular to a pressure regulating valve with a fixed diaphragm center and stable gas flow. Background technique [0002] Pressure regulating valves are widely used in light industry, chemical industry, petroleum, natural gas and other gas transmission occasions. Attachment 3 is a schematic structural diagram of a traditional pressure regulating valve. When the pressure regulating button on the upper end of the pressure regulating valve is loosened, the main spring is not under pressure. , the pressure regulating plug is lifted upwards under the action of the plug spring, the flow path between the pressure regulating plug and the pressure regulating valve body is sealed, the airflow from the left air inlet cannot reach the right air outlet, the pressure regulating valve is off. When the pressure regulating knob is tightened, the main spring is forced t...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a pressure regulating valve with a fixed diaphragm center and stable gas flow in order to solve the problem that the center of the diaphragm in the current pressure regulating valve is easily shifted, resulting in air leakage of the pressure regulating valve and resulting in unstable gas flow.

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