Multifunctional pipeline gas self-closing valve and self-closing method thereof

Abstract

The invention provides a multifunctional pipeline gas self-closing valve and a self-closing method thereof. A first valve rod and a second valve rod are arranged in an in-valve working space of a valve body, one end of the first valve rod is connected with a magnet in an automatic valve, the other end of the first valve rod is connected with the second valve rod, and a magnetic disc is assembled at the bottom end of an attraction rod and connected with the magnet at the upper end of the first valve rod in an attraction manner; and the upper end of the attraction rod in an electromagnetic head drives the first valve rod to move downwards in the valve body through the electromagnetic effect, and the second valve rod is driven to move horizontally in the valve body through the guiding effect of a pin hole of the first valve rod on a pin of the second valve rod. The mechanical control function of the gas self-closing valve and the electric appliance control function of a gas electromagnetic valve are combined, when the gas supply pressure of a pipeline is under-pressure, over-pressure and over-flow, a machine is automatically closed, a gas source is cut off, meanwhile, the remote control cut-off function is achieved, the gas source is remotely controlled and emergently cut off in linkage with a gas alarm, manual opening is achieved, multiple functions are achieved, and gas use safety is guaranteed.

Description

technical field [0001] The invention relates to the field of gas safety devices, in particular to a multifunctional pipeline gas self-closing valve and a self-closing method thereof. Background technique [0002] With the development and growth of the gas industry, gas has entered thousands of households, and the penetration rate of gas use has greatly increased. However, gas is a flammable and explosive gas, which is highly dangerous. Once a gas explosion or fire accident occurs, it is often easy to cause serious casualties or property losses. [0003] The gas pipeline safety control equipment suitable for pipeline natural gas, liquefied petroleum gas and artificial gas in the market is mainly pipeline gas self-closing valve and gas solenoid valve. The pipeline gas self-closing valve is a gas safety control device installed on the pipeline of the low-pressure gas system. It does not have the electrical control function. The mechanical control function is completed by the i...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem in the prior art that there is no mechanical automatic protection against the underpressure and overpressure of the pipeline gas supply pressure when the pipeline gas supply pressure occurs, the present invention provides a multifunctional pipeline gas self-closing valve and its self-closing valve. The closing method is simple in structure and...

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