Ball valve with scour-prevention valve base

Abstract

The invention relates to a ball valve with a scour-prevention valve base. The ball valve is characterized in that a positioning groove and a straight groove are formed in the bottom face of a runner,the positioning groove is of a fan arc structure with the vertical axis of the ball valve as the center line, the straight groove is formed under the horizontal axis of the ball valve, one end of thestraight groove communicates with one end of the positioning groove, the other end of the straight groove extends to a near runner opening, an adjusting device is arranged in the runner, the adjustingdevice comprises a ball clack, a compression spring, a telescopic rod, a positioning rod and an adjusting sleeve, a lower outer rod and a lower inner rod with the axes consistent with the axis of theadjusting sleeve are arranged on the lower middle portion of a valve body, the upper end of the lower outer rod is fixedly connected with the adjusting sleeve, the lower end of the lower outer rod extends out of the lower end of the valve body, the lower inner rod is arranged in the lower outer rod, the upper end of the lower inner rod is provided with a pull rod with the vertical section in an inverted right trapezoid, the pull rod extends to the upper portion of an inner cavity of the adjusting sleeve through an adjusting clamping groove, and the lower end of the lower inner rod extends outof the lower end face of the lower outer rod. The beneficial effects that the valve base is good in scour prevention, the service life is long, and safety is high are achieved.

Description

technical field [0001] The invention relates to a ball valve, in particular to an anti-scouring ball valve with a valve seat. Background technique [0002] The existing ball valve mainly includes a valve body, a valve seat, a ball and an upper valve stem. The ball is placed in the inner cavity of the valve body. It forms a seal with the outer surface of the ball. The ball is driven by the valve stem and rotates 90 degrees around the axis of the ball valve. It cooperates with the valve seat to open and close the fluid. The disadvantage is that during the process of opening and closing the ball, part of the valve seat The medium on the inlet side of the ball valve will flow to the outlet side of the ball valve through the gap between the valve seat and the ball surface, and the flow of the medium, especially the high-pressure and high-speed medium, will wash the surface of the valve seat, thus destroying the valve seat , leading to valve leakage and short service life. Cont...

AI Technical Summary

Problems solved by technology

[0002] The existing ball valve mainly includes a valve body, a valve seat, a ball and an upper valve stem. The ball is placed in the inner cavity of the valve body. It forms a seal with the outer surface of the ball. The ball is driven by the valve stem and rotates 90 degrees around the axis of the ball valve. It cooperates with the valve seat to open and close the fluid. The disadvantage is that during the process of opening and closing the ball, part of the valve seat The medium on the inlet side of the ball valve will flow to the outlet side of the ball valve through the gap between the valve seat and the ball surface, and the flow of the medium, especially the high-pressure and high-speed medium, will wash the surface of the valve seat, thus destroying the valve seat , leading to valve leakage and short service life

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