A chemical pipeline fireproof cock valve

Abstract

The invention provides a fireproof plug valve for a chemical pipe. The fireproof plug valve comprises a main valve body, a screw plug, a torsional spring, a rotating disc, a poking disc, a reset spring, a self-locking disc, a valve rod, an upper cover, a first shaft clamping spring, a spring piece and a rotary knob, wherein the screw plug, the torsional spring, the rotating disc, the poking disc, the reset spring, the self-locking disc and the valve rod are sequentially inserted into the main valve vertically. The upper cover, the first shaft clamping spring, the spring piece and the rotary knob are sequentially arranged on the valve rod in a sleeving mode. The two ends of the upper cover are fixedly connected to the main valve through screws. The side edge of the main valve body is integrally provided with a guide pipe. A jack is inserted into the guide pipe and sequentially sleeved with a jack spring, a guide nut, a thermosensitive control spring, a positioning flange and a second shaft clamping spring. The guide nut is fixedly connected with the guide pipe. The fireproof plug valve is reliable in structure, durable, of double functions, and capable of preventing toxic and inflammable gas and liquid from leaking effectively when fires are generated. Compared with an existing common valve, the fireproof plug valve for the chemical pipe can be turned off automatically.

Description

technical field [0001] The invention designs a chemical pipeline valve. In particular, it relates to a chemical pipeline fire cock valve with manual and automatic functions, which can prevent disaster accidents caused by the leakage of toxic, flammable gases and liquids due to fire. Background technique [0002] Because chemical products are extremely important means of production, and can be used as clean and environmentally friendly energy, they are indispensable necessities for industrial and agricultural production and people's lives. In the process of production and daily use, disaster accidents such as poisoning, fire and explosion caused by leakage due to fire frequently occur. Preventing leakage of toxic, gas and liquid has become a worldwide research topic. [0003] For this reason, people have carried out long-term exploration and proposed various technical solutions. Chinese utility model patent ZL00234322.3 provides a gas safety hose, including a hose, at least...

AI Technical Summary

Problems solved by technology

Since the gas outlet nozzle must be pushed to start the automatic control device, there is still the problem of gas leakage caused by external force motion friction, and there are still unsafe factors

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