A high-pressure pipeline manual balance valve

Abstract

The invention discloses a high-pressure pipeline manual balance type valve which mainly comprises a valve body, a valve cover, a large valve rod, a stuffing pressure cover, a valve clack, a piston, a small valve element, a spring, a piston blocking ring and a hand wheel. According to the high-pressure pipeline annual balance type valve disclosed by the invention, fluid pressure balance is carried out by utilizing a balance cavity which is composed of a valve opening in the top of the valve body and a piston, so that drive force of a valve regulating assembly is reduced, opening and closing of the valve are facilitated; the large valve rod structure is designed into a multi-launder structure, so that the problem that fluid flows to the balance cavity from a high-pressure area can be effectively solved; the piston blocking ring and a cone valve pin are mounted in the middle of the large valve rod, so that the cone valve pin mounted on the piston blocking ring and a conical pin hole in the piston are matched to be in an opening state and a closing state, and therefore, the pressure storage effect and the pressure relief effect of the balance cavity are achieved. According to the high-pressure pipeline manual balance type valve, the valve body adopts a balance type structure, so that the acting force during valve opening and closing is reduced, and therefore, the high-pressure pipeline manual balance type valve has the advantages such as small opening-closing moment of force, reliable tightness, stable working performance, and the like, can be suitable for various operation environments, and is simple and convenient to operate.

Description

technical field [0001] The invention belongs to the field of cut-off valves, and more specifically relates to a manual balancing valve of a high-pressure pipeline. Background technique [0002] As an indispensable control unit in fluid control systems, valves are widely used in the production and development of various industries. Valve control is ubiquitous in oil exploration, natural gas transportation, hydraulic management systems, chemical manufacturing, and pharmaceutical production systems; in power generation industries such as hydropower, thermal power, and nuclear power; and in various transportation equipment such as vehicles, ships, and aircraft. Especially in the high-tech fields of national defense, various special valves are used in navigation, aviation and aerospace. [0003] In the industrial automation fluid control system, the stop valve is one of the widely used fluid control equipment, which is used to connect or cut off the medium. There are many types...

AI Technical Summary

Problems solved by technology

[0004] When the working pressure of the existing globe valve reaches above 3.5MPa and the diameter DN is greater than 100mm, it is very difficult to open the valve purely manually, and an additional force arm is required to open it smoothly, but these irregular operations will inevitably cause certain damage to the valve , greatly reducing the service life of the valve

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