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

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.