Rotary four-eccentricity ball valve

A four-eccentric, rotary technology, applied in the direction of valve devices, cocks including cut-off devices, engine components, etc., can solve the problems of ball valve wear, poor sealing performance, and high pressure, so as to improve life, reduce wear, reduce The effect of opening and closing torque

Inactive Publication Date: 2016-08-10
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In summary, although the existing eccentric ball valves have been further improved, there are still certain problems in terms of pressure and temperature.
[0004] The material of the seat seal ring of the ball valve is mainly polytetrafluoroethylene. Since polytetrafluoroethylene has the characteristics of high expansion coeff

Method used

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  • Rotary four-eccentricity ball valve
  • Rotary four-eccentricity ball valve
  • Rotary four-eccentricity ball valve

Examples

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Embodiment Construction

[0035] The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0036] Such as figure 1 A rotary four-eccentric ball valve shown is mainly composed of valve body 3, upper valve stem 10, lower valve stem 7, ball 8, valve seat 4, spring 1, sealing ring 2, packing sealing device 9, bolt 5, nut 6 components; the ball 8 is located in the valve body 3, the spring 1 is set between the ball 8 and the valve seat 4, the end cover and the bottom cover are set on the valve body 3, and the valve body 3 and the two valve seats 4 are connected by bolts 5 is connected with the nut 6, the upper valve stem 10, the lower valve stem 7 and the sphere 8 are threadedly connected, a sealing ring 2 is arranged between the sphere 8 and the valve body 3, the upper valve stem 10, the lower valve stem 7 and the valve body 3 is provided with a packing sealing device 9; the ball valve is provided with an eccentric distance, ...

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PUM

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Abstract

The invention discloses a rotary four-eccentricity ball valve which comprises a valve body, an upper valve rod, a lower valve rod, a ball body, valve seats, bearings, springs, sealing rings and packing seal structures and is a rotary ball valve. The ball body is located in the valve body. The springs are arranged between the ball body and the valve seats. The valve body is provided with an end cover and a bottom cover. The valve body and the two valve seats are connected through threads. The valve rods and the ball body are also connected through threads. The sealing rings are arranged between the ball body and the valve body. The packing seal structures are arranged between the valve rods and the valve body. According to the ball valve, four eccentricity distances exist and include contact eccentricity between the centers of the valve rods and the sealing surfaces, eccentricity between the centers of the valve rods and the center of the valve body, angle eccentricity for perpendicularity of the sealing contact surfaces to the center of a valve body channel, and eccentricity which is formed between the rotation centers of the valve seats and the plain lines of the cross sections of the sealing surfaces of the valve seats and enables the engagement angle of the ball body to be adjustable. The ball valve can reduce abrasion between sealing pairs and reduce opening and closing torque, and the life of the ball valve is prolonged.

Description

technical field [0001] The invention belongs to the technical field of agricultural machinery and relates to a four-eccentric ball valve, in particular to an eccentric ball valve with the characteristics of reducing wear between sealing pairs, reducing opening and closing torque, and improving the service life of the ball valve. Background technique [0002] Due to good sealing and flow characteristics, ball valves are widely used in some industries, such as paper making, natural gas, high pressure fields, etc. The ball valve is evolved from the plug valve. Its opening and closing part is a sphere. The ball is rotated 90° around the axis of the valve stem to realize the opening and closing of the valve, which can cut off, distribute and change the flow direction of the medium. Compared with butterfly valves, ball valves have the lowest flow resistance and good sealing performance. They can be used in corrosive media and low-boiling liquids to achieve rapid opening and closin...

Claims

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Application Information

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IPC IPC(8): F16K5/06
CPCF16K5/06
Inventor 施爱平谢为
Owner JIANGSU UNIV
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