Ball valve shell casting

Abstract

The invention relates to a ball valve shell casting, which comprises a body, wherein a through hole is formed in the body; the through hole is sequentially divided into an inner spherical surface section, a first round hole section and a second round hole section from one end to the other end; the first round hole section and the second round hole section are arranged concentrically; the central line of the first and second round hole sections passes the circle center of the inner spherical surface section; the diameter of the outer end of the inner spherical surface section is larger than the diameter of the connection end of the inner spherical surface section and the first round hole section; the connection part of the inner spherical surface section and the first round hole section is in slant transition; the diameter of the first round hole section is larger than the diameter of the second round hole section; a step is formed at the connection part of the first and second round hole sections. The ball valve shell casing has the characteristics that reinforcing blocks are uniformly distributed on the periphery of the body corresponding to the step of the through hole, and the reinforcing blocks are integrated with the body in a casting way; after the casting is adopted, the intensity of the body is improved, cracks are not easily produced, and a ball valve is not easy to damage.

Description

technical field [0001] The invention relates to a metal casting, in particular to a ball valve shell casting for manufacturing a ball valve. Background technique [0002] The so-called ball valve refers to a valve that uses a sphere with a circular through hole as the opening and closing part, and the sphere rotates with the valve stem to realize the opening and closing action. With the rapid development of science and technology, ball valves are widely used in petroleum refining, long-distance pipelines, chemical industry, papermaking, pharmaceuticals, water conservancy, electric power, municipal, steel and other industries, and occupy a pivotal position in the national economy. Ball valves are mostly made of metal, and their shells need to be cast into castings using molds in the early stage of manufacture, and then the castings are processed to make them. [0003] Traditional ball valve shell castings include a body with a through hole. The through hole is divided into a...

AI Technical Summary

Problems solved by technology

This kind of ball valve shell casting is easy to form stress concentration at the step in the through hole, which makes the casting low in strength. During subsequent processing or use, cracks are prone to occur at this place, resulting in damage to the ball valve.

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