Ball valve with low-wear seal surface

A technology of ball valves and balls, which is applied in the direction of valve devices, cocks including cutting devices, engine components, etc., can solve the problem of increasing the wear time of the valve seat and the sealing surface of the ball, increasing the wear of the sealing surface of the valve seat and the ball, and affecting the use of the ball valve Life and other issues, achieve the effect of light weight, prolong service life and simple structure

Active Publication Date: 2012-06-27
CHANGZHENG ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the opening and closing process of the ball valve, the pretightening force between the valve seat and the ball always acts on the sealing surface of the valve seat and the ball, which increases the wear time of the valve seat and the sealing surface of the ball, and the opening and closing torque of the ball valve is also greater than that of other valves. Type valves, the pre-tightening force increases the wear between the sealing surface of the valve seat and the ball, which affects the service life of the ball valve

Method used

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  • Ball valve with low-wear seal surface
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  • Ball valve with low-wear seal surface

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Embodiment Construction

[0017] The present invention will be described in detail below according to the accompanying drawings

[0018] The present invention includes a valve body (in this embodiment, the valve body includes a first valve body part 1 and a second valve body part 2, and the two are combined with each other to form a complete valve body, but those skilled in the art can clearly know The valve body structure can also be realized by other means), valve stem 3, fixed shaft 4, ball 5, valve seat 6, sealing ring 7, pressure ring 8, spring 9, positioning pin 10, such as figure 1 shown. There are two positioning pins 10 on the upper and lower sides of the valve seat 6, and the positioning pins 10 are fixed on the valve seat 6 in a threaded form, and the upper and lower non-sealing surface parts of the sphere 5 are each processed into a cam shape. The closing of the ball valve is accomplished by rotating the valve stem 3 and the ball 5 clockwise 90°, by Figure 2-Figure 8 , which explains in ...

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Abstract

The invention relates to a ball valve with a low-wear seal surface for pipeline control. In the invention, by principle of a cam structure, rotation of the ball body in the process of opening and closing the ball valve is changed into linear reciprocating movement of a valve seat. By designing a cam type surface and a positioning pin of a non-seal surface of the ball body, the relative position of the ball seat and the ball body in the process of opening and closing the ball valve and state of the seal surface of the ball seat and the ball body are controlled to reduce the frictional time of a seal pair between the valve seat and the ball body and prolong the service life of the seal pair between the valve seat and the ball body.

Description

technical field [0001] The invention relates to a pipeline control valve, in particular to a ball valve with low wear on the sealing surface. Background technique [0002] Ball valves are widely used in aerospace, petroleum, natural gas, long-distance pipelines, light industry and food industries due to their characteristics of small flow resistance, fast switching, good sealing performance, long service life, and convenient air and electric control. With the rise of the coal chemical industry and other industries in recent years, the ball valve has the characteristics of good sealing performance and long service life under the conditions of high temperature, high pressure and high wear resistance. Developing in the direction of large diameter and long life, its reliability and other performance indicators have reached a high level, and it has partially replaced gate valves and globe valves. [0003] The ball valve achieves sealing by setting the pre-tightening force betwee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K5/20F16K5/08
Inventor 赵海燕黎玉飞刘际李伯文赵子荣
Owner CHANGZHENG ENG
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