A gas cut-off device and its operating method

Abstract

The invention discloses a gas cutting-off device and an operation method thereof. The device comprises a front valve body, a valve plate, a middle valve body, a hose, a rear valve body, a front check ring, a compression spring, a rear check ring, an opening device and a fixed pull rod. The check rings and a handle are arranged on the valve plate, the middle valve body, the hose and the rear valve body are connected in sequence, the front check ring and the rear check ring are arranged on the outer circle of the middle valve body and the outer circle of the rear valve body respectively, the compression spring is placed on the outer circle of the hose, and the opening device is arranged on the front check ring and the rear check ring, and comprises an upper pull rod, a lower pull rod, a front pull rod base, a rear pull rod base and a rotating shaft. In the operation process, a user pulls the upper pull rod to drive the middle valve body to move backwards so that the valve plate can be in place, and the device automatically recovers after the upper pull rod is pushed back. The gas cutting-off device can guarantee reliable gas cutting, and has the advantages of being simple in structure, convenient to operate and the like.

Description

technical field [0001] The present invention relates to a gas shut-off device and a method of operation thereof. Background technique [0002] Nowadays, various gases are used in industry or civil use, such as natural gas, coal gas, oxygen, hydrogen, ammonia, etc., and the measures to stop the gas must be considered when using the gas. There are various conventional valves on the market that can cut off the gas, such as Valves such as ball valves, butterfly valves, gate valves, and globe valves can cut off gas. When the gas is stopped, the valve needs to be closed. If the conventional valve is not closed tightly due to damage or misoperation, gas will leak downstream. For toxic, harmful, flammable and explosive gases, it will cause safety hazards or direct losses to downstream users. In this case It is necessary to add a reliable cut-off valve behind the conventional valve to completely cut off this hidden danger. [0003] The common practice at this stage is to add blind ...

AI Technical Summary

Problems solved by technology

When operating the manual blind valve and the flange plus blind plate, it is necessary to disassemble the bolts and nuts and open the flange to operate the blind plate. After operating the blind plate, re-tighten the bolts and nuts. The operation is troublesome and laborious. Leakage of medium-dangerous gases will increase the chance of accidents

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