Corrosion-resistant high-sealing ball valve

Abstract

The corrosion-resistant high-sealing ball valve comprises a valve body, a valve rod and a ball body, a shaft hole communicated with an inner cavity of the valve body is formed in the upper end of the valve body, the valve rod penetrates through the shaft hole and is in linkage connection with the ball body arranged in the inner cavity of the valve body, and valve seats are installed on the positions, corresponding to the two sides of the ball body, of the inner wall of the valve body respectively. Fluorine-lined layers are arranged on the inner wall of the valve body, the outer wall of the valve rod and the surface of the ball body; mounting grooves are formed in the positions, corresponding to the two sides of the ball body, of the inner wall of the valve body respectively, the valve seats are arranged in the corresponding mounting grooves, supporting rings are further arranged in the mounting grooves, a floating gap is formed between the supporting rings and the valve seats, elastic rings are arranged in the floating gap, and annular air cavities are formed in the elastic rings. The two ends of the elastic ring abut against the valve seat and the supporting ring respectively, and the elastic ring is used for applying pre-tightening force towards the direction of the ball to the valve seat. The valve seat has the advantages of being excellent in corrosion resistance and high in sealing performance, meanwhile, the service life of the valve seat can be prolonged, and the later maintenance cost is reduced.

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