A mechanical electromagnetic gas emergency cut-off valve

Abstract

The invention discloses a mechanical electromagnetic type fuel gas emergency shut-off valve which comprises a valve body, a shell, a valve deck, a valve element, a valve clack, reset springs and an actuating mechanism, wherein the valve element comprises a mandrel, a connecting rod, a cam and a pothook; the lower part of the mandrel is connected with the valve clack; the middle of the mandrel is mounted on the valve body in a sliding and sealing manner; the upper part of the mandrel stretches into the shell to be hinged to the lower end of the connecting rod; the cam and the pothook are rotatably mounted on the shell; one end of the cam is hinged to the upper end of the connecting rod, and a lug matched with the pothook is arranged at the other end of the cam; the lower part of the pothook abuts against the actuating mechanism, and the upper end of the pothook is hooked on the lug of the cam through the reset spring II. The mechanical electromagnetic type fuel gas emergency shut-off valve can be rapidly started under any circumstance, can resist against complex pipeline pressure, and is simple in structure, safe and reliable, unlikely to damage, long in service life, and applicable to popularization and application.

Description

technical field [0001] The invention relates to a gas alarm system, in particular to a gas cut-off valve, in particular to a mechanical electromagnetic gas emergency cut-off valve. Background technique [0002] With the gradual liberalization of urban gas utilities and the rapid development of the gas industry, natural gas, liquefied petroleum gas, coal gas and other piped gas have been rapidly popularized in my country. The use of gas brings great convenience to people's life, effectively improves people's quality of life and reduces environmental pollution. But at the same time, it has also brought many disasters to people's lives. Safety accidents such as poisoning, explosions, and fires caused by gas leakage have occurred from time to time, which have brought huge losses to people's lives and property, and have become the most concerned focus of the gas industry. and focus. [0003] The gas emergency shut-off valve is a valve installed at the outlet of the gas storage ...

AI Technical Summary

Problems solved by technology

However, in actual use, especially in civil gas main pipelines or industrial gas pipelines, the pipeline pressure changes greatly. When the negative pressure in the pipeline is large, the current shut-off valve is easy to close by mistake, which cannot effectively ensure the safety of gas use.

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