Gas pipeline fire prevention plug valve

Abstract

The invention discloses a gas pipeline fire prevention plug valve. The gas pipeline fire prevention plug valve comprises a main valve body with plug holes communicating with each other, a gas inlet and a gas outlet, and a rotary knob covering the upper end of the main valve body. A gas opening and closing mechanism used for opening and closing a gas passing channel from the gas inlet to the gas outlet is arranged at the inner side of the upper end of the main valve body. A thermosensitive device mounting hole used for mounting a thermosensitive device is further formed in one side of the upper plug hole of the main valve body. A rotating mechanism which makes the gas opening and closing mechanism close the gas passing channel from the gas inlet to the gas outlet under the driving action of heating motion of the thermosensitive device is arranged on the thermosensitive device mounting hole and located at the inner side of the upper end of the main valve body. A limiting pin with one end being inserted into the rotary knob and used for controlling the set rotating angle of the rotary knob is arranged at one side of the rotary knob. The gas inlet of the main valve body is internally and fixedly provided with a dust screen through a dust screen clamping spring. The gas pipeline fire prevention plug valve is reliable in structure, durable in use, and capable of achieving the dual functions and effectively preventing leakage of poisonous and inflammable gases when a fire breaks out.

Description

technical field [0001] The invention relates to a gas pipeline valve. In particular, it relates to a gas pipeline fireproof cock valve with manual and automatic functions, which can prevent the leakage of poisonous and flammable gas due to fire and disaster accidents. Background technique [0002] Since gas is an extremely important living and production resource, and can be used as a clean and environmentally friendly energy source, it is an indispensable necessity for industrial and agricultural production and residents' lives. In the process of production and daily use, disasters and accidents of poisoning, fire and explosion caused by gas leakage occur from time to time. In particular, once a fire breaks out, the fire will expand in an instant. Prevention of toxic and flammable gas leakage and fire has become a worldwide research topic. [0003] People have carried out long-term exploration for this reason, and proposed various technical solutions. Chinese invention p...

AI Technical Summary

Problems solved by technology

In the process of production and daily use, disasters and accidents of poisoning, fire and explosion caused by gas leakage occur from time to time. In particular, once a fire breaks out, the fire will expand in an instant, and it is impossible to extinguish the fire with water, which is very easy to cause an explosion

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