Multifunctional pipeline gas self-closing valve

Abstract

The invention discloses a multifunctional pipeline gas self-closing valve comprising a gas inlet bin. Internal threads are formed in the inner wall of one side of the gas inlet bin, one side of the gas inlet bin is fixedly connected with a pressure cavity, and the side, away from the gas inlet bin, of the pressure cavity is fixedly connected with a closing cavity. During use, a pressure measuring on-off mechanism in the pressure cavity detects the gas pressure of circulating fuel gas, the fuel gas is conducted when in overpressure, the fuel gas is shunted into a piston barrel through an L-shaped pipe, the strong pressure in the piston barrel is increased, a piston head moves towards an exhaust bin, and a first sealing plug is pushed to the exhaust bin through a piston rod; and a circulation path of the closing cavity and the exhaust bin is closed, the overpressure fuel gas is prevented from flowing to a user side, a safety accident is avoided, the pressure detection process and the fuel gas blocking process are both completed in a closed interval, overpressure fuel gas leakage is eradicated to the maximum extent without the participation of an electronic component in control, and the possibility that a fire disaster is caused by circuit faults does not exist.

Description

technical field [0001] The invention relates to the technical field of gas valves, in particular to a multifunctional pipeline gas self-closing valve. Background technique [0002] The self-closing valve is installed on the pipeline of the low-pressure gas system. When the gas supply pressure of the pipeline is under-pressure or over-pressure, it can be automatically closed without electricity or other external power and must be opened manually. The self-closing valve installed at the connection between the end of the pipeline behind the gas meter and the rubber hose should have the function of closing without pressure. [0003] The existing gas self-closing valves are equipped with external control parts, which need to participate in the working process of the self-closing valve, and the self-closing valve cannot complete the overpressure isolation of the gas through its own parts, which leads to the need to open at least one valve housing. The hole connected to the outsid...

AI Technical Summary

Problems solved by technology

[0003] The existing gas self-closing valves are equipped with external control parts, which need to participate in the working process of the self-closing valve, and the self-closing valve cannot complete the overpressure isolation of the gas through its own parts, which leads to the need to open at least one valve housing. The hole connected to the outside world increases the difficulty of sealing the valve housing and increases the risk of gas leakage. It is urgent to design a multifunctional pipeline gas self-closing valve to solve the above problems

Images