Shockproof and fireproof emergency cut-off valve for gas

Abstract

The invention relates to a vibration-resistance fireproof fuel emergency cutoff valve, which comprises an upper valve, a lower valve, a valve cover, a temperature sensing operator, and a recovering device. Wherein, the recovering device is at the bottom of lower valve and formed by a recovering operational rod and a nut; the top of recovering operational rod has a groove; the upper valve has a valve rod and a valve rod limit device; the valve rod limit device has a limit guide hole along the axes; the valve rod axle is through and slide matches the limit guide hole while its top is fixed under the valve cover; one valve ball is movably arranged between the groove and the bottom of valve rod; the temperature sensing operator is at one side of valve ball to dial the valve ball. The invention has the temperature sensing operator made from nickel-titanium memory alloy, and a valve ball as the vibration sensing element, therefore, it has quick response and recoverable utilization without needing energy supply and it can resist the vibration and fire. The invention can be used in low-middle pressure pipeline or the pipeline of steel bottle liquid gas.

Description

Technical field: [0001] The invention relates to a valve, in particular to a gas emergency cut-off valve with dual functions of shock resistance and fire prevention. Background technique: [0002] With the rapid development of society and economy, the popularity rate of gas use in urban and rural areas has been greatly improved. Gas pipelines are all over the underground of cities and towns, and liquefied gas in cylinders is also widely used in many families. [0003] Earthquakes are sudden natural disasters with great destructive power. A destructive earthquake will paralyze a normally operating city in an instant. Gas accidents in the secondary disasters of earthquakes have brought serious damage to national property and people's lives. The danger cannot be underestimated. The Hanshin earthquake in Japan, the Neftegorsk earthquake in Russia, and the Indian Ocean tsunami all caused serious damage to the city. The earthquake caused secondary disasters such as gas leakage an...

AI Technical Summary

Problems solved by technology

This kind of heat-sensing safety valve has the advantages of fast response and reusability, but it will only work when the surrounding air reaches a certain temperature after a fire occurs

And when an earthquake occurs, in order to prevent gas leakage and subsequent fires, it is necessary to cut off the transmission of gas at the very beginning of the earthquake, but the existing fire-proof gas safety valve cannot take this situation into account. it works

At present, there is also a special anti-shock gas safety valve, which can automatically close the valve after sensing the vibration of the earthquake, but it cannot work in the event of a fire

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