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Ball valve with low-wear seal surface

A technology for ball valves and balls, which is applied to valve devices, cocks including cut-off devices, engine components, etc. It can solve the problem of affecting the service life of ball valves, increasing the wear time of valve seats and ball sealing surfaces, and increasing the sealing surface of valve seats and balls Wear and other problems, achieve the effect of light weight, simple structure and prolong service life

Active Publication Date: 2015-07-15
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, which are combined with each other to form a complete valve body, but those skilled in the art can obviously know that The valve body structure can also be realized in other ways), 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. The valve seat 6 has two positioning pins 10 on the upper and lower sides, the positioning pins 10 are fixed on the valve seat 6 in the form of threads, and the upper and lower non-sealing surfaces of the ball 5 are processed into cam shapes. The closing of the ball valve is accomplished by rotating the stem 3 and the ball 5 90° clockwise, through Figure 2-Figure 8 , explains in detail the relative positions...

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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 have been widely used in aerospace, oil, natural gas, long-distance pipelines, light industry and food industries due to their small flow resistance, fast switching, good sealing performance, long service life, and easy gas control and electronic control. With the rise of coal chemical industry and other industries in recent years, ball valves have the characteristics of good sealing performance and long service life under high temperature, high pressure and high wear resistance conditions. Large-diameter and long-life development direction, its reliability and other performance indicators have reached a high level, and have partially replaced gate valves and globe valves. [0003] The ball valve is formed by the pre-tightening force set between the valve seat and the ball and the force genera...

Claims

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Application Information

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Patent Type & Authority Patents(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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