Novel fixing ball valve

Abstract

According to the invention, a supporting tube is designed to protect a supporting ring from being scoured by fluid in a large area, more importantly, a reversed-sleeve type supporting ring structure is more suitable for a structure of a steel tube ball valve, and forge pieces which are also needed to be used as valve bodies at the left end and the right end to place a traditional supporting ring structure before are omitted; the reverse-sleeve type supporting ring structure invented at the moment can be made by machining a pipeline and a steel plate, a runner opening and the supporting tube are made of pipelines, materials and machining cost of the forging pieces at the two ends of the valve body are omitted, the anti-corrosion treatment cost of the original supporting ring part is also saved, and the best sealing effect in a bi-direction and bi-sealing mode is achieved; and the bottom of a ball body adopts a structure that a supporting valve rod is combined with a supporting plate, sothat leakage points of holes in the bottom of the valve body are avoided, meanwhile, the material cost and the machining cost of a lower valve cover are saved, and the rotating operation torsion is also reduced.

Description

technical field [0001] The invention relates to the technical field of ball valves, in particular to a new fixed ball valve. Background technique [0002] The existing ball valve structure (as attached figure 1 ) fixed ball valve, the support rings on both sides of the ball are processed from the inner side of the flow channel mouth close to the ball to place the support tube assembly directly. The processing technology is not conducive to the production and processing of the product, and the material cost is relatively high. The ball is fixed in position supported by the upper and lower valve stems, and the lower valve stem is exposed outside the middle cavity of the valve body. In this way, the lower valve stem not only increases the leakage point, but also increases cost. [0003] Therefore, how to provide a new trunnion ball valve with low cost, good sealing effect and reduced rotational operating torque is an urgent problem to be solved by those skilled in the art. ...

AI Technical Summary

Problems solved by technology

[0002] The existing ball valve structure (as attached figure 1 ) fixed ball valve, the support rings on both sides of the ball are processed from the inner side of the flow channel mouth close to the ball to place the support tube assembly directly. The processing technology is not conducive to the production and processing of the product, and the material cost is relatively high. The ball is fixed in position supported by the upper and lower valve stems, and the lower valve stem is exposed outside the middle cavity of the valve body. In this way, the lower valve stem not only increases the leakage point, but also increases cost

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