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Simple and easy determining method of three-eccentric center butterfly valve seal surface dimension interference

A triple eccentric butterfly valve, simple judgment technology, applied in the direction of lift valve, valve device, engine components, etc., can solve the problems affecting the use effect and service life of the triple eccentric butterfly valve, friction and wear, design accuracy reduction, etc.

Active Publication Date: 2014-04-09
如东文园投资开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the problem of size interference of the sealing surface is the most prominent; once the size interference occurs, it will often lead to leakage or jamming, and at the same time it will cause additional friction and wear, which will greatly affect the use effect and service life of the triple eccentric butterfly valve; in the triple eccentric butterfly valve In the design process of the sealing surface, the selection of the design parameters of the sealing surface (especially the three eccentric parameters) is very important, and the most critical issue in the optimal design of the sealing surface parameters is how to determine whether the design parameters will lead to the appearance of dimensional interference; because Due to the complexity of the internal relationship of the sealing surface parameters of the triple eccentric butterfly valve, empirical parameters combined with 3D modeling software are often used in engineering design to judge whether there is dimensional interference. Using this design process usually requires repeated corrections and debugging to obtain better design parameters, so it is inevitable. The ground will lead to the reduction of design accuracy and the extension of design cycle

Method used

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  • Simple and easy determining method of three-eccentric center butterfly valve seal surface dimension interference
  • Simple and easy determining method of three-eccentric center butterfly valve seal surface dimension interference
  • Simple and easy determining method of three-eccentric center butterfly valve seal surface dimension interference

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Determine the design parameters

[0026] Obtain and determine the five main design parameters of the sealing surface of the triple eccentric butterfly valve: the length of the major axis of the ellipse on the neutral surface of the valve plate D max =250 mm, the valve plate thickness is t =14 mm, axial eccentricity c =10 mm, radial eccentricity e = 20 mm, and angular eccentricity = 13°.

[0027] 2) Establish a coordinate system

[0028] Take the apex of the sealing conical surface as the origin, the direction perpendicular to the plane of the valve plate is the x-axis, and the direction parallel to the long axis of the ellipse on the neutral surface of the valve plate is the y-axis to establish a rectangular coordinate system; the thickness of the valve plate is t , the intercepts of its two sides on the x-axis are x 1 and x 2 , the length of the major axis of the mid-plane ellipse D max ; The coordinates of the valve plate rotation axis in the xy plane ...

Embodiment 2

[0036] 1) Determine the design parameters

[0037]Obtain and determine the five main design parameters of the sealing surface of the triple eccentric butterfly valve: the length of the major axis of the ellipse on the neutral surface of the valve plate D max =250 mm, the valve plate thickness is t =14 mm, axial eccentricity c =10 mm, radial eccentricity e = 40 mm, and angular eccentricity = 13°.

[0038] 2) Establish a coordinate system

[0039] Take the apex of the sealing conical surface as the origin, the direction perpendicular to the plane of the valve plate is the x-axis, and the direction parallel to the long axis of the ellipse on the neutral surface of the valve plate is the y-axis to establish a rectangular coordinate system; the thickness of the valve plate is t , the intercepts of its two sides on the x-axis are x 1 and x 2 , the length of the major axis of the mid-plane ellipse D max , the coordinate of the valve plate rotation axis in the xy plane is...

Embodiment 3

[0047] 1) Determine the design parameters

[0048] Obtain and determine the five main design parameters of the sealing surface of the triple eccentric butterfly valve: the length of the major axis of the ellipse on the neutral surface of the valve plate D max =240 mm, the valve plate thickness is t =14 mm, axial eccentricity c =30 mm, radial eccentricity e = 10 mm, and angular eccentricity = 14°.

[0049] 2) Establish a coordinate system

[0050] Take the apex of the sealing conical surface as the origin, the direction perpendicular to the plane of the valve plate is the x-axis, and the direction parallel to the long axis of the ellipse on the neutral surface of the valve plate is the y-axis to establish a rectangular coordinate system; the thickness of the valve plate is t , the intercepts of its two sides on the x-axis are x 1 and x 2 , the length of the major axis of the mid-plane ellipse D max ; The coordinates of the valve plate rotation axis in the xy plane ...

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Abstract

The invention relates to a three-eccentric center butterfly valve, and in particular relates to a simple and easy determining method of three-eccentric center butterfly valve seal surface dimension interference. The method provided by the invention comprises the steps of: determining the design parameters; building a coordinate system, carrying out numerical discrete processing, determining the subarea and determining. Through the method, whether the butterfly valve seal surface is subjected to interference can be determined, and the particular position of the interference area can be determined.

Description

technical field [0001] The invention relates to a triple eccentric butterfly valve, in particular to a simple method for judging the size interference of the sealing surface of a triple eccentric butterfly valve. Background technique [0002] The triple eccentric butterfly valve has a special triple eccentric combination structure, which can realize the instantaneous disengagement or closing between the valve plate and the valve seat when the butterfly valve is opened and closed, and after opening, the valve plate and the valve seat no longer interfere, thereby greatly reducing This structure is also conducive to improving the sealing performance; under the same external torque conditions, the triple eccentric butterfly valve has better sealing performance than other butterfly valves. In addition, the triple eccentric butterfly valve can also withstand Larger pressure difference than other butterfly valves, therefore, triple eccentric butterfly valves are widely used in vari...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K1/226
Inventor 坎标丁建宁华同曙袁宁一
Owner 如东文园投资开发有限公司