Ball valve

Abstract

The invention relates to a ball valve including the valve body, the ball core, the valve pole and the hand grip. Between the inlet and outlet of the valve body is set with the fluid hole. One side sealing face of two sides sealing face in ball core hole is set with the antisepsis hole. When the ball core is open, the ball core hole is connected to the valve body fluid hole which is through the ball core hole, the antisepsis hole is connected to the ball valve body hollow; when the ball core turns to the close after 1 / 4 circles, the sealing side of the antisepsis hole is faced to the inlet of the valve body which is through the antisepsis hole and the ball core hole is connected to the ball valve body hollow. The valve shell includes the connecting end mouths in two ends. The ring sealing seat is set in the valve body inlet which the inside face is set with the valve core sealing ring. The hollow sealing ring is set between the valve body and the ring sealing loop seat. The ball valve is not easy to corrupt, has long life and keeps the medium fresh and quality stable; also it has the compact structure and not easy to leak.

Description

technical field [0001] The invention relates to a ball valve. Background technique [0002] As shown in Figure 1, the ball core of the existing ball valve will cause a part of the medium to be sealed in the body cavity of the ball valve during use, that is, the gap between the outer spherical surface of the ball core and the valve body, thus causing the residual medium in the body cavity of the ball valve to enter the valve. The local destructive electrochemical corrosion on the surface, the overpressure expansion of the closed medium in the body cavity will damage the valve and affect the service life of the ball valve; and cause the deterioration and corrosion of the residual medium in the body cavity of the ball valve, affecting the freshness and quality of the medium. , especially in the pharmaceutical and food industries, the quality of the medium flowing through the ball valve is more critical; and because the ball valve body is connected by the body body, bonnet, and ...

AI Technical Summary

Problems solved by technology

[0005] Due to the above technical solution, by setting the anti-corrosion through hole on the ball core to conduct the medium in the pipeline and the body cavity of the ball valve, the body cavity of the ball valve is always filled with the same medium as the pipeline. The local electrochemical corrosion of the body cavity is transformed into the uniform corrosion of the body cavity which is always filled with the medium. The uniform corrosion generally forms a protective film, which is insoluble in the corrosive medium, thereby hindering the corrosion, greatly reducing the corrosion rate of the ball valve and prolonging the service life of the ball valve. At the same time, it also avoids the deterioration and corrosion of the residual medium in the body cavity itself; it can also avoid the damage to the valve caused by the overpressure expansion of the closed medium in the body cavity of the ball valve due to external factors; and because the anti-corrosion through hole faces the valve body when the valve is closed The entrance realizes the sealing after the valve in the closed state, and can also effectively avoid the local electrochemical corrosion of the residual medium in the low recess in the ball valve body cavity in the closed state that exists in the front seal of the valve; The ring seat structure replaces the previous structure where the main body of the valve body and the valve cover are connected by connecting bolts, which makes the structure compact, not bulky, and reduces the waste of raw materials (the weight of the ball valve of the same specification can be reduced by 8-15%). Due to the defect that the two sections of the body are stressed and easy to leak, and because the valve body is an integral valve body and the valve core sealing ring at the outlet end of the valve is directly set on the integral valve body, the anti-corrosion through hole faces the annular sealing ring in the closed state The inner end face of the seat faces the direction of the inlet, so that in the closed state, the thrust of the fluid pressure on the valve body through the ball core and the pulling force of the inlet joint act on one part of the integral valve body, which can ensure the strength of the product and prevent Leakage performance and service life, and if the valve core sealing ring at the outlet end of the valve is set on the annular sealing ring seat, then in the closed state, the connection between the valve body and the annular sealing ring will be relatively poor in strength and subject to long-term fluid thrust. Defects such as weak connection and easy leakage due to repeated actions

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