Retained ball valve to prevent seat jamming

Abstract

The invention belongs to a fixing ball valve capable of effectively preventing a valve seat from being blocked. The fixing ball valve comprises a valve rod, a valve ball connected with the valve rod, the valve seat tightly attached to the valve ball, a valve body for fixing the valve seat and a buffer separation tank connected with the valve body; the valve body comprises a left valve body, a right valve body and a middle body; the valve seat comprises a left valve seat and a right valve seat; inner flanges and outer flanges are arranged at two ends of the left valve body and the right valve body; buffer liquid guide-in holes are designed in the tops of the inner flanges; annular gaps are designed between the valve body and the valve seat below the buffer liquid guide-in holes; an upper guide pipe is disposed at the top of the buffer separation tank; conveyed fluid guide-out holes are designed in the middles of the left valve body and the right valve body; a lower guide pipe is disposed on the lower portion of the buffer separation tank; front seal rings are arranged on the left valve body and the right valve body; rear seal rings are disposed on the left valve seat and the right valve seat; springs are uniformly distributed between the valve body and the valve seat along a circular ring. By means of the fixing ball valve for preventing the valve seat from being blocked, the problems of valve leakage and difficult valve opening and closing caused by the fact that the valve seat is blocked by solid particles are solved, and economic losses of enterprises are lowered.

Description

technical field [0001] The invention belongs to the technical field of ball valves, in particular to a fixed ball valve capable of effectively preventing valve seat jamming. Background technique [0002] Fixed ball valve is widely used in petroleum, chemical industry, metallurgy, Electricity, water conservancy, medicine and other fields. At the same time, the trunnion ball valve has the advantages of small size, light weight, small consumables, small installation size, and small driving torque, and has become one of the fastest-growing valves in recent years. However, when transporting corrosive or scouring fluids, the seat and ball of the ball valve must be made of corrosion-resistant or high-hardness wear-resistant materials. The valve seat moves along the guiding cylindrical surface of the valve body and presses against the valve ball to achieve the purpose of sealing. There are solid particles in the conveying medium of the existing fixed ball valve, and the solid part...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a fixed ball valve that can effectively prevent the valve seat from jamming, solve the problems of solid particles jamming the valve seat, causing valve leakage, and difficulty in opening and closing the valve, reducing the business loss

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