Straight pull type pipeline gas self-closing valve

Abstract

The invention relates to a straight pull type pipeline fuel gas self-closing valve. The straight pull type pipeline fuel gas self-closing valve comprises a valve body and a valve cover, wherein a gas inlet end and a gas outlet end are arranged on the valve body, an opening matching with the valve cover is perpendicularly formed in the top of the valve body, a leather film is arranged between the opening position of the valve body and the valve cover in a pressing mode, and the straight pull type pipeline fuel gas self-closing valve further comprises a ventilation opening which is formed inside the valve body and located under the opening, a flow limiting valve, a first iron sheet, a second iron sheet and a magnet, wherein the flow limiting valve is located between the air inlet end and the ventilation opening, the first iron sheet is fixed to the inner wall of the valve body, a vent hole is formed in the first iron sheet, a stand column used for blocking the ventilation opening is arranged on the first iron sheet in a sliding and penetrating mode, a lifting rod is arranged on the valve cover in a sliding mode, a leather film is located between the second iron sheet and the valve cover, and the magnet attracts the first iron sheet to enable the stand column to block the ventilation opening. According to the straight pull type pipeline gas self-closing valve, overpressure self-closing, underpressure self-closing and overcurrent self-closing can be completed, the self-closing valve does not need electric control, the structure is simple, the sensitivity is high, and the safety when a user uses fuel gas is greatly improved.

Description

technical field [0001] The invention relates to the field of gas pipeline self-closing valves, in particular to a straight-pull pipeline gas self-closing valve. Background technique [0002] With the advancement of science and technology, and in order to reduce carbon emissions, natural gas has gradually entered thousands of households. In the process of natural gas transmission, high-pressure transmission is mainly used. After natural gas is transported to end users, the pressure of natural gas pipelines is too high or Too small will affect the safety of natural gas use. In order to make residents use natural gas better and reduce the risk of using natural gas, it is necessary to limit the pipeline pressure of natural gas within a certain range, and at the same time, it is necessary to limit the flow in the natural gas pipeline . [0003] At present, when limiting the pressure and flow of gas pipelines, self-closing valves are usually used. There are many types of self-clo...

AI Technical Summary

Problems solved by technology

[0003] At present, when limiting the pressure and flow of gas pipelines, self-closing valves are usually used. There are many types of self-closing valves on the market. Some self-closing valves need to use electricity as a power source to control their own opening and closing. When the power is insufficient, this will cause the self-closing valve to fail to work, endangering the life and property safety of users

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