Novel structure gas proportional valve

Abstract

The invention relates to the field of gas valves, and aims at providing a novel structure gas proportional valve. The novel structure gas proportional valve comprises a valve body provided with an isolation ring, an air inlet way communicating with the side of the isolation ring, and an air outlet communicating with the upper end of the isolation ring, a proportional valve assembly, and a check valve assembly arranged on the air inlet flue. The proportional valve assembly comprises a proportional valve element with the upper end provided with a check ring, a membrane, a proportional valve element position adjusting assembly, a needle valve element provided with a protruding ring, and a pressure regulating compression spring, wherein the lower end of the proportional valve element is connected with the membrane, and the outer edge of the membrane is in sealed connection with the lower end of the isolation ring. The proportional valve element is provided with a needle valve hole, a plurality of side air inlet holes formed in the side of the proportional valve element and communicating with the side of the needle valve hole, and pressure stabilizing air outlet holes communicating with the upper end of the needle valve hole and the upper end of the proportional valve element correspondingly. The needle valve element is located in the needle valve hole. The two ends of the pressure regulating compression spring press the lower end of the needle valve hole and the lower end of the protruding ring correspondingly. According to the novel structure gas proportional valve, when gas pressure fluctuates within short time, adjustment is sensitive, and the air inlet check function is achieved.

Description

technical field [0001] The invention relates to the field of gas valves, in particular to a gas proportional valve with a new structure. Background technique [0002] The utility model of Chinese patent application number: CN201620201556.1 discloses a gas proportional valve. The gas proportional valve includes: a valve body, a valve core assembly and a drive reset member, wherein a first valve chamber, a second Valve cavity and valve port, the lower end of the valve port is connected to the first valve cavity and the upper end is connected to the second valve cavity, the first valve cavity is connected to the air inlet, and the second valve cavity is connected to the air outlet; the valve core assembly is opened in the up and down direction It is movably arranged on the valve body between the position of closing the valve port. The valve core assembly includes a valve core and a seal. The seal is arranged on the valve core. When the valve core assembly closes the valve port,...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the current gas proportional valve, which is not sensitive enough to adjust when the gas pressure fluctuates in a short time, and does not have an intake cut-off function; Functional New Structure Gas Proportional Valve

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