Emergency shut-off valve

Abstract

The invention relates to the technical field of valve bodies, in particular to an emergency shut-off valve which comprises a valve body, a shut-off structure and a control structure, wherein the shut-off structure comprises a locking assembly and a connecting rod assembly; the locking assembly comprises a fixing sleeve, a compressing sleeve and a ball; the connecting rod assembly comprises a warped plate and a swinging rod part; the valve body comprises a valve rod and a reset assembly; the reset assembly is connected with one end part of the valve rod; the valve rod sequentially penetrates through the compressing sleeve and the fixing sleeve from top to bottom; the lower end surface of the compressing sleeve is in contact with the upper end surface of the fixing sleeve; a triangular notchis formed in the edge, close to a valve plate, of the contact surface; a notch is formed in the position, corresponding to the triangular notch, of the valve rod; the ball is positioned in the spacedefined by the triangular notch and the notch; one end of the warped plate is connected with the compressing sleeve; the other end of the warped plate is in contact with the swinging rod part; and thecontrol structure is connected with the swinging rod part so as to control the swinging rod part to swing. The emergency shut-off valve provided by the invention has the beneficial effects that by adoption of the control structure based on a plurality of principles, the multi-mode emergency shut-off function can be achieved and various modes can be independent of one another; and through the cooperation with the shut-off structure, the high integration of the valve body can be achieved.

Description

technical field [0001] The invention relates to the technical field of valve bodies, in particular to an emergency cut-off valve. Background technique [0002] At present, with the vigorous promotion and application of natural gas in my country, the market demand for pipeline transportation control components has increased rapidly. At present, most of the emergency shut-off gate valves used at the wellheads of gas wells in Southwest oil and gas fields adopt hydraulic control systems. Changes in oil temperature cause oil viscosity changes to a large extent. affect the accuracy of the control. At the same time, the way of direct drive under high pressure leads to a relatively large volume of the cut-off device, which is expensive and inconvenient for installation and maintenance. [0003] The wellhead ground safety control system has a logic control function. When there are factors affecting ground safety such as high temperature at the well site, fire, ultra-high and low pres...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to solve the problems of low integration, poor reliability and high cost of existing emergency shut-off valves

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