Pipe bursting shutoff valve

Abstract

A pipe bursting shutoff valve comprises a valve body which is arranged on a pipe body and communicated with the inner portion of the pipe body. The pipe bursting shutoff valve further comprises a control cavity, a valve shaft, a first elastic component, a diaphragm piston and a valve disc, the first elastic component, the diaphragm piston and the valve disc are arranged on the valve shaft in sequence, the control cavity is connected with the valve body, the valve shaft penetrates through the control cavity to enter the valve body, the diaphragm piston is arranged inside the control cavity, the control cavity is in rigid connection with the diaphragm piston, the control cavity is divided into an independent upper chamber and an independent lower chamber, the valve disc is arranged inside the valve body, the lower chamber is communicated with the pipe body through a lower chamber through pipe, the first elastic component can drive the valve shaft to move along the central line of the valve shaft after being stressed and deformed, and the movement of the valve shaft can enable the diaphragm piston to be deformed in the control cavity to change the size of the upper chamber and the size of the lower chamber, and meanwhile can drive the valve disc to move in the valve body and the pipe body. The pipe bursting shutoff valve has the advantages of being capable of adapting to the normal change of pressure in a pipeline and being mounted by adopting any angle.

Description

Technical field [0001] The invention relates to a shutoff valve, in particular to a burst pipe shutoff valve. Background technique [0002] The large amount of fluid leakage caused by the burst pipe of a pressurized pipeline will cause greater losses to the production and life of people along the line. Relying on the self-controlled blast pipe shut-off valve can quickly move to full close or a certain degree of opening, minimize the consequences of fluid leakage in the leakage section, reduce secondary losses caused by accidents, and improve the safety of the pipe network And economy. [0003] The pipe burst shutoff valve is a device that can quickly detect and intercept fluid transportation after a pipe burst under pressure. It is suitable for various water supply pipelines such as urban water supply projects and industrial water supply projects. The hydraulically controlled pipe burst shutoff valve does not require electrical control, but only relies on the characteristics of t...

AI Technical Summary

Problems solved by technology

The disadvantages are: 1. Because the weight relies on gravity to function, the valve must be arranged horizontally; 2. Since the weight is installed inside, it is not easy to adjust the size of the required control flow

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