Wear-free spherical check valve

Abstract

The invention discloses a wear-free spherical check valve. The wear-free spherical check valve comprises a valve body, a spherical cylindrical valve core, a spring, a flow guide plate, a side valve body and spacers. The wear-free spherical check valve is characterized in that the left end of the side valve is connected with the right end of the valve body and provided with the flow guide plate, the spacers are installed between the flow guide plate and the valve body and between the flow guide plate and the side valve body correspondingly, and the flow guide plate is internally provided with the spherical cylindrical valve core; a sealing face is formed between the spherical cylindrical valve core and the middle of the valve body, a guiding rod is arranged on the spherical cylindrical valve core and is in a three-level steeped shape, and a spherical cylindrical valve core first-level step and a spherical cylindrical valve core third-level step simultaneously make contact with the flow guide plate for guiding; and the compression spring is installed between the spherical cylindrical valve core and the flow guide plate, and the sealing face is provided with a stellite alloy in a bead weld mode. According to the wear-free spherical check valve, the spherical cylindrical valve core is pressed in a sprung mode through the spring, the spherical cylindrical valve core makes contact with two positions of the flow guide plate for guiding, the centering property is good, the structure is reasonable, sealing and nonoccurrence of displacement are ensured, the sealing property is good, and the anti-backflow effect is good; the contact position of the spherical cylindrical valve core and the valve body is provided with the stellite alloy in a bead weld mode, the wear-resisting property is good, and the service life of the valve body is long.

Description

technical field [0001] The present invention relates to a check valve, more specifically, it relates to a wear-free 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 have poor wear resistance due to frequent contact between the valve core and the valve body or their contact points are not treated, resulting in wear of the valve core and valve body, 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 non-abrasive spherical check valve, which uses stellite alloy surfacing at the contact point ...

AI Technical Summary

Problems solved by technology

Ordinary spherical check valves have poor wear resistance due to frequent contact between the valve core and the valve body or their contact points are not treated, resulting in wear and tear on the valve core and valve body, affecting the service life and performance of the valve

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