Pressure-relief spherical check valve

Abstract

The invention discloses a pressure relief spherical check valve, which comprises a valve body, a spherical cylinder valve core, a spring, a guide plate, a side valve body and a gasket, and is characterized in that: the left end of the side valve body is connected to the valve body The right end is connected, and there is a pressure relief channel in the valve body. The pressure relief channel is a stepped hole, and a conical valve core is matched in the stepped hole. The right end of the conical spool is pre-pressed with a pressure relief spring. A deflector is provided, and gaskets are respectively installed between the deflector, the valve body and the side valve body, and a spherical cylindrical valve core is installed in the deflector, and the spherical cylindrical valve core forms a seal with the middle part of the valve body. On the surface, the spherical cylinder spool is provided with a guide rod, and the guide rod is in the shape of three steps. The first step of the spherical cylinder spool and the third step of the spherical cylinder spool are in contact with the guide plate at the same time. A compression spring is arranged between the spool and the deflector. The invention uses the opening of the conical valve core in the pressure relief channel to avoid damage to the spherical cylinder valve core or failure of the spring, has good sealing performance and long service life of the valve, and can be widely used in cold water, hot water, industrial and domestic sewage, etc. The pump outlet of the pipe network.

Description

technical field [0001] The present invention relates to a check valve, more specifically, it relates to a pressure relief spherical check valve. Background technique [0002] Check valve is the basic element of fluid control engineering. It can determine the direction of fluid flow, protect other fluid machinery and pipeline safety by preventing fluid reverse flow. It is widely used in petroleum, metallurgy, chemical industry, electric power, construction, heat, Water treatment and other industries. Ordinary spherical check valves cause damage to the valve core due to collision or spring failure due to excessive opening pressure, which affects the service life and performance of the valve. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a pressure relief spherical check valve, which can protect the valve core, spring and other parts, and improve the service life and performance of the valve. [0004] In or...

AI Technical Summary

Problems solved by technology

Ordinary spherical check valves cause damage to the valve core or spring failure due to excessive opening pressure, which affects the life and performance of the valve

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