Up-mounting type double-eccentricity ball valve

Abstract

The invention relates to an up-mounting type double-eccentricity ball valve which comprises a valve body, a ball body, a valve rod and an operating mechanism of the valve rod. A valve cavity and two medium channels arranged at two ends of the valve cavity are arranged inside the valve body, the ball body is arranged inside the valve cavity, two valve seats matched with the ball body are arranged at positions, corresponding to all medium channels, of the valve cavity, the valve body is provided with an opening enabling the ball body and the valve seats to penetrate through, a valve cover is arranged on the opening, the valve cover and the valve body are detachably connected, the valve seats are arranged to be soft valve seats, the ball body is in an eccentric structure, a diagonal line of a front end of the closing rotating direction of a section of the ball body is smaller than a diagonal line of a rear end of the closing rotating direction of the section of the ball body, wherein the section is perpendicular to a rotating shaft of the ball body, and the two valve seats are respectively arranged towards one side of the closing rotating direction of the ball body in an inclined mode. According to the technical scheme, the up-mounting type double-eccentricity ball valve has the advantages of largely improving service life of the ball valve and facilitating on-line repair.

Description

technical field [0001] The invention relates to a top loading type double eccentric ball valve. Background technique [0002] A ball valve usually includes a valve body, a valve stem, a valve cover, and a ball with medium flow channels at both ends. In a traditional ball valve, the valve seat set to match the ball is supported by a spring. During the opening and closing of the ball valve, the spring is always Apply force to the valve seat to make the valve seat and the ball seal together, so that there is always a large sliding friction force between the ball and the valve seat, resulting in serious wear of the valve seat and the ball, so that the service life of the ball valve is not high, and it is not easy to maintain online . Contents of the invention [0003] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a top-entry double eccentric ball valve which greatly improves the service life of the ball valve and facilitates o...

AI Technical Summary

Problems solved by technology

[0002] A ball valve usually includes a valve body, a valve stem, a valve cover, and a ball with medium flow channels at both ends. In a traditional ball valve, the valve seat set to match the ball is supported by a spring. During the opening and closing of the ball valve, the spring is always Apply force to the valve seat to make the valve seat and the ball seal together, so that there is always a large sliding friction force between the ball and the valve seat, resulting in serious wear of the valve seat and the ball, so that the service life of the ball valve is not high, and it is not easy to maintain online

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