An eccentric ball valve

Abstract

The invention provides an eccentric ball valve. The eccentric ball valve comprises a valve body, a valve cover, a valve ball and a valve seat; the valve body is provided with a middle cavity and a first fluid channel communicating with the middle cavity; the valve cover is detachably connected with the valve body and is provided with a second fluid channel; after the valve cover and the valve bodyare connected, the second fluid channel communicates with the middle cavity; the valve ball is rotationally installed inside the middle cavity through an operation mechanism and is provided with a valve ball sealing face; the valve seat is installed on the valve cover and is provided with a valve seat sealing face capable of extruding the valve ball sealing face to seal the second fluid channel;and the valve seat is installed on the valve cover through an adjustable installing structure in a manner of being capable of finely moving, under driving of the operation mechanism, the valve ball rotates to enable the valve ball sealing face and the valve seat sealing face to be in extrusion contact gradually, the valve seat can finely move, and even-pressure sealing can be achieved between thevalve ball sealing face and the valve seat sealing face. By means of the eccentric ball valve, continuous abrasion of the valve ball and the valve seat can be avoided, and the good sealing performanceis achieved.

Description

technical field [0001] The invention relates to the technical field of industrial valves, in particular to an eccentric ball valve. Background technique [0002] Ball valve is one of the most widely used valves. It has simple structure, reliable sealing and convenient maintenance. It is widely used in petroleum, chemical industry, metallurgy, textile, food, atomic energy, aviation and other fields. The ball valve has the action of rotating 90°. The cock body is a sphere with a circular through hole or channel passing through its axis. It is mainly used for cutting, distributing and changing the flow direction of the medium in the pipeline. It only needs to be rotated 90° It can be tightly closed with precise operation and small rotational torque. Hard-sealed ball valve refers to the ball valve whose sealing pair (that is, the sealing surface of the valve seat and the sealing surface of the ball) is matched with metal to metal. Hard-sealed ball valves are usually used when ...

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the technical defect that the hard-sealed ball valve in the prior art requires high installation accuracy of the valve seat. An eccentric ball valve that has lower requirements for valve seat installation accuracy but can still ensure sealing strength

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