Pipeline fuel gas safe self-closing valve

Abstract

The invention discloses a pipeline fuel gas safe self-closing valve. The pipeline fuel gas safe self-closing valve comprises an upper cover and a valve body, wherein the valve body is provided with a gas inlet end and a gas outlet end and integrally connected with a cut-off valve used for opening or closing the gas outlet end; an upper chamber, a lower chamber and a valve opening are formed in the valve body; the lower chamber is connected with the gas inlet end; an isolation piece is arranged in the upper chamber, the lower portion of the isolation piece is connected with a floating core rod, and the upper portion of the isolation piece is provided with a permanent magnet; the floating core rod is provided with a closing ring; an annular groove is formed in the valve body and located on the outer side of the valve opening; a sealing ring which is used for being matched with the closing ring to seal the valve opening is arranged in the annular groove; a film is arranged in the upper chamber and located above the isolation piece; the upper portion of the film is connected with a pulling rod, the upper end of the pulling rod penetrates out of the valve body, and the lower end of the pulling rod penetrates through the film to be matched with the permanent magnet. As the cut-off valve is additionally arranged on the pipeline fuel gas safe self-closing valve, the self-closing valve can be closed rapidly. The cut-off valve and the valve body are connected integrally, so that the trouble of assembling is saved, and the sealing performance is improved.

Description

technical field [0001] The invention relates to a self-closing valve, in particular to a pipeline gas safety self-closing valve. Background technique [0002] In real life, people use a lot of gas valves, but their structures are complex, difficult to install, high in cost, slow in response, poor in closing effect, poor in reliability, and likely to cause safety hazards. When the pressure is too low, the gas is cut off, or the hose connected to the gas appliance suddenly leaks, the automatic closing of the valve cannot be controlled, resulting in gas leakage, which can easily cause fire, explosion, poisoning and other accidents, bringing great danger to users. The currently used pipeline gas safety self-closing valve has a slow response when closing the valve and needs to be improved urgently. Moreover, the existing pipeline gas safety self-closing valve cannot be closed quickly when it needs to be closed. Contents of the invention [0003] The purpose of the present inv...

AI Technical Summary

Problems solved by technology

[0002] In real life, people use a lot of gas valves, but their structures are complex, difficult to install, high in cost, slow in response, poor in closing effect, poor in reliability, and likely to cause safety hazards. When the pressure is too low, the gas is cut off, or the hose connected to the gas appliance suddenly leaks, the automatic closing of the valve cannot be controlled, resulting in gas leakage, which can easily cause fire, explosion, poisoning and other accidents, bringing great danger to users

The currently used pipeline gas safety self-closing valve has a slow response when closing the valve, which needs to be improved urgently

Moreover, the existing pipeline gas safety self-closing valve cannot be closed quickly when it needs to be closed

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