Protection device of fuel gas valve

Abstract

The invention provides a protection device of a fuel gas valve and belongs to the technical field of machines. The protection device of the fuel gas valve solves the problems that an existing fuel gas valve is low in safety performance and the like. The protection device of the fuel gas valve comprises a valve body, a valve rod and a valve element, wherein the valve body is provided with an air inlet pipe and an air outlet pipe, and the valve element is arranged in the valve body. One end of the valve rod is connected with the valve element, and the other end of the valve rod penetrates out of the valve body. The protection device is fixed in the valve body. The protection device comprises a shaft sleeve, a sealing shaft, a sealing gasket and a spring. The shaft sleeve is fixed in the valve body, and the sealing shaft is axially arranged in the shaft sleeve in a sliding and penetrating mode. One end of the sealing shaft is provided with the sealing gasket, the spring is sleeved on the sealing shaft, one end of the spring abuts against the sealing gasket, and the other end of the spring abuts against the shaft sleeve. When the spring is compressed, sealing is formed between the sealing gasket and the shaft sleeve so as to block circulation of fuel gas. The protection device of the fuel gas valve has the advantages of being simple in structure, good in safety performance, long in service life and the like.

Description

technical field [0001] The invention belongs to the technical field of machinery and relates to a protection device, in particular to a protection device for a gas valve. Background technique [0002] At present, gas as a fuel has penetrated into thousands of households, especially in large and medium-sized cities. Pipeline gas has been installed in the kitchen, and the gas valve is a very important part. By controlling the opening and closing of the gas valve, the pipeline gas is opened or blocked. . When using piped gas, especially when cooking, when the gas pressure exceeds a certain pressure, the positive appliance may be extinguished. At this time, people cannot know whether it is caused by the high pressure of the piped gas or the problem of the burning appliance itself. caused by. [0003] In order to solve the above problems, people have invented various gas valves with the function of detecting gas pressure. For example, Chinese patent literature discloses a gas v...

AI Technical Summary

Problems solved by technology

However, when the gas valve with this structure is in use, when the gas flows through the gas valve, the flow and pressure of the gas exceed the normal pressure, or the rubber hose is damaged and leaks, the gas valve itself does not have a safety protection device. The danger cannot be alleviated or even eliminated in time, and the safety performance is low

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