Retention-free full-enclosing three-piece-type ball valve

Abstract

The invention discloses a non-retention all-inclusive three-piece ball valve, which includes a left side cover, a flange, a right side cover, a valve body, a high-pressure pipe installation groove, a spherical valve plate and a sealing ring. Flanges are welded on the surface of the cover and the valve body, a valve body is provided on one side of the left side cover, a right side cover is provided on one side of the valve body, the left side cover, the right side cover and the valve body are three The other is fixedly connected by the bolts that pass through the flange, the upper part of the valve body is provided with a valve stem installation groove, the valve stem is installed inside the valve stem installation groove, and the top of the valve stem extends out of the valve stem installation groove, The bottom surface of the valve stem is welded with a valve block, and the diameter of the present invention gradually increases from the center of the spherical valve plate to both ends of the left side cover and the right side cover through the fluid channel, so that the fluid remaining in the fluid channel is under the action of gravity. The fluid gradually flows out of the valve body, and the fluid can be flushed out of the fluid channel by injecting high-pressure gas into the gas injection seat.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a non-retention all-inclusive three-piece ball valve. Background technique [0002] The valve is a pipeline accessory used to open and close the pipeline, control the flow direction, adjust and control the parameters of the conveying medium. According to its function, it can be divided into shut-off valve, check valve, regulating valve and so on. [0003] When the existing ball valve is in use, the medium will enter the interior of the valve body along with the fluid channel, and it is difficult to ensure that the fluid will not remain inside the fluid channel, and the residual fluid remaining in the fluid channel for a long time will cause rust and corrosion to the fluid channel And other problems, which in turn affect the service life of the ball valve, Contents of the invention [0004] The object of the present invention is to provide a non-retention all-inclusive three-pi...

AI Technical Summary

Problems solved by technology

[0003] When the existing ball valve is in use, the medium will enter the interior of the valve body along with the fluid channel, and it is difficult to ensure that the fluid will not remain inside the fluid channel, and the residual fluid remaining in the fluid channel for a long time will cause rust and corrosion to the fluid channel And other problems, which in turn affect the service life of the ball valve,

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