High-temperature metal hard seal ball valve for granular media

Abstract

The invention provides a high-temperature metal hard seal ball valve for granular media. The high-temperature metal hard seal ball valve comprises a valve body, a ball body, a valve rod, a valve seat and a bottom cover, wherein the ball body is arranged in a cavity in the valve body, the valve rod connected with the ball body extends out of the valve body through a center through hole at the upper part of the valve body, the bottom cover is positioned at the bottom of the valve body and comprises a bottom cover baseplate and a bottom cover shaft, the bottom cover baseplate is movably connected with the valve body, the bottom cover shaft penetrates through a through hole at the lower part of the valve body and is connected with the ball body in the cavity of the valve body, the ball body and the valve seat are made of metal materials, the valve seat is mounted in the valve body and on the inner wall which is in contact with the ball body, a spring seat is arranged on the outer side of the valve seat, a disc spring is mounted in a groove between the spring seat and the valve seat, a pressure ring is arranged on the outer side of the spring seat, the pressure ring is fixedly mounted on the spring seat through a screw, a pendant collet for playing a sealing role is arranged in the contact position of the spring seat, the pressure ring and the valve body, an O ring is arranged in the groove between the valve seat and the valve body, and the O ring is made of fluorine rubber.

Description

technical field [0001] The invention relates to a ball valve, in particular to a high-temperature metal hard-sealed ball valve for granular media. Background technique [0002] The ball valve is evolved from the cock, and its opening and closing parts are used as a sphere, and the sphere is rotated 90 degrees around the axis of the valve stem. To achieve the purpose of opening and closing. The ball valve is mainly used to cut off, distribute and change the flow direction of the medium on the pipeline. The ball valve not only has a simple structure and good sealing performance, but also has a small volume, light weight, less material consumption, and a small installation size within a certain nominal passage range. Moreover, the driving torque is small, the operation is simple, and it is easy to realize rapid opening and closing. The ball valve is one of the fastest-growing valve varieties in the past ten years. Especially in industrialized countries such as the United Stat...

AI Technical Summary

Problems solved by technology

[0010] (2) Metal hard-sealed ball valves are limited by structural conditions. This structure is not suitable for valves with diameters below DN200. The reason is that the overall structure of the valve plate is too thick and the flow resistance is large.

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