V-shaped ball valve

Abstract

The invention relates to a V-shaped ball valve. The V-shaped ball valve is characterized by further comprising a scraper and a conversion sleeve, wherein the scraper is arranged in an inner cavity ofthe valve body and is arranged outside a V-shaped ball body; the scraper is equipped with a circular-arc-shaped blade which can be matched with a valve clack sealing surface to scrape off a medium onthe surface of the valve clack sealing surface; the upper end of the scraper is in key type connection to a valve rod; the lower part of the scraper is equipped with a positioning ring; the positioning ring extends into the lower end of the valve rod, and is matched with the valve rod to limit the scraper from moving up and down; the V-shaped ball body is further fixedly equipped with a positioning sleeve; the positioning sleeve is of a circular tube type structure, and sleeves at the outer circle of the valve rod; a spiral type groove which takes the axis of the valve rod as a center line isformed in the positioning sleeve; the conversion sleeve is arranged on the lower part of the positioning sleeve; a positioning rod which extends into the spiral groove is arranged on the upper part ofthe conversion sleeve; the inner part of the conversion sleeve is in threaded connection to the valve rod; and the lower part of the conversion sleeve is equipped with a straight rod which extends into the lower end of the valve rod and can prevent the conversion sleeve from rotating. The V-shaped ball valve has the advantages of cleaning the valve clack sealing surface, being not liable to generate leakage, and being long in service life.

Description

technical field [0001] The invention relates to a ball valve, in particular to a V-shaped ball valve. Background technique [0002] The existing V-shaped ball valve mainly includes a valve body, a valve seat, a V-shaped ball and a valve stem. The V-shaped ball is placed in the inner cavity of the valve body. The valve seat is provided with a valve seat sealing surface that can form a seal with the valve disc sealing surface. The V-shaped ball is driven by the valve stem and rotates around the ball valve axis. The V-shaped ball and the valve seat cooperate to open and close the fluid. The disadvantage is that when the valve uses a liquid or gas medium with high viscosity, easy crystallization or coking, the medium is easy to stick to the sealing surface of the disc, and it is easy to damage the sealing surface of the disc during opening or closing. And the sealing surface of the valve seat is prone to leakage and has a short service life. Contents of the invention [0003...

AI Technical Summary

Problems solved by technology

[0002] The existing V-shaped ball valve mainly includes a valve body, a valve seat, a V-shaped ball and a valve stem. The V-shaped ball is placed in the inner cavity of the valve body. The valve seat is provided with a valve seat sealing surface that can form a seal with the valve disc sealing surface. The V-shaped ball is driven by the valve stem and rotates around the ball valve axis. The V-shaped ball and the valve seat cooperate to open and close the fluid. The disadvantage is that when the valve uses a liquid or gas medium with high viscosity, easy crystallization or coking, the medium is easy to stick to the sealing surface of the disc, and it is easy to damage the sealing surface of the disc during opening or closing. and seat sealing surface, prone to leakage and short service life

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