Pneumatic type pipe explosion safety valve and method

Abstract

The invention discloses a pneumatic type pipe explosion safety valve and a method. The valve comprises a valve body, an end cap, an end cap cover, a movable part, a valve shaft, a valve disc, a gas cylinder and a communication loop, wherein a branch channel of the valve body is connected with a flange face on one side of the end cap, a flange face on the other side of the end cap is connected with the end cap cover, the valve shaft is in sliding fit with a core seat of the end cap, the valve disc located at one end of the valve shaft makes contact with a valve seat in the valve body, an upper cavity and a lower cavity on the two sides of the movable part at the other end of the valve shaft communicate with the gas cylinder and the communication loop respectively, and the valve disc is driven to be closed or opened through a pressure difference between the upper cavity and fluid on the downstream side of a main channel. According to the valve, the problems that an original pipe explosion valve adopts a spring to drive the valve disc to be opened and closed, failure is prone to occurring, and adjustment is inconvenient are solved, and the pipe explosion safety valve has the characteristics of being simple in structure, avoiding closure or opening failure, facilitating flexible pressure adjustment and being easy and convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of shut-off valves, and relates to a pneumatic squib safety valve and a method thereof. Background technique [0002] The large amount of fluid leakage caused by the explosion of the pressurized pipeline will cause great losses to the production and life of people along the line. The pipe burst safety valve, which relies on its own control, can quickly move to full close, minimize the consequences of fluid leakage in the leakage section, reduce secondary losses caused by accidents, and improve the safety and economy of the pipeline network. [0003] Invention patent: 201310301183.6, a squib shut-off valve, including a valve body arranged on the pipe body and communicating with the inside of the pipe body, the squib shut-off valve also includes a control chamber, a valve shaft, and a first An elastic part, piston, valve disc, the control chamber is connected with the valve body, the valve shaft enters the va...

AI Technical Summary

Problems solved by technology

[0004] Its disadvantages are: because the spring is used as the force to drive the valve to close, the metal creep effect may occur when the spring does not move for a long time, and the elastic coefficient becomes smaller, causing the valve to close when the pipeline pressure is low and cause failure; When adjusting the value, it is necessary to change the spring compression stroke or directly replace the spring, which is inconvenient to adjust

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