A top-mounted gas storage metal hard-sealed ball valve that can be maintained online

Abstract

The invention provides a top-mounted gas storage metal hard-sealed ball valve capable of online maintenance, which includes a valve body, a ball, a valve stem and a valve seat. The outer surface of the valve seat is provided with a first low plane, a first step and a second Low plane, between the outer surface of the valve seat and the valve body is an active space for placing the spring seat; the spring seat includes a protruding section and a moving section, the length of the protruding section is greater than the length of the first step, the moving section and the first step A first spring is provided in the contact surface of the step, and a spring pressure plate is fixed on the end of the extension section; The part is located on the third low plane, the spring seat slides towards the ball, and the limiting part is against the second step. The ball valve of the present invention is a top-mounted type, with stable and reliable sealing performance, fire prevention, anti-static, and small total valve torque. repair.

Description

A metal hard-sealed ball valve of a top-mounted gas storage that can be maintained online technical field The invention belongs to the ball valve technical field, be specifically related to a kind of on-line maintenance top-loading type gas storage metal hard sealing ball valve. Background technique [0002] The ball valve has the characteristics of reliable sealing, simple structure and convenient maintenance, and has become one of the most widely used valves. one. Compared with the side-mounted ball valve, the top-mounted ball valve has the advantages of fewer external leakage points and less influence of pipeline stress on it. Ball valves are widely used because they can be easily repaired online. Because the valve end is usually connected by welding, it needs to be able to be repaired on-line, and when the middle cavity is overpressured, it can be automatically repaired in time. Dynamic discharge, while ensuring the reliable sealing performance of the valve to m...

AI Technical Summary

Problems solved by technology

The existing ball valves have the following problems. Take the two-piece or three-piece side-mounted valve body structure as an example. Specifically, the floating ball structure is to drill holes on the ball to realize automatic pressure relief; another example is the fixed ball structure. Drilling holes on the upstream valve seat to achieve automatic pressure relief, none of these structural forms can meet the needs of online maintenance. The basic requirements of pipeline valves have deviated; and the drilling of fixed ball structure valve seats is completely dependent on the check valve with coil spring to realize automatic pressure relief, which is extremely unreliable

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