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Test analysis method for tri-eccentric butterfly valve sealing pair and tri-eccentric butterfly valve

A technology of triple eccentric butterfly valve and analysis method, applied in instruments, measuring devices, mechanical measuring devices, etc., can solve the problem of uneven interference of the sealing pair of triple eccentric butterfly valve

Active Publication Date: 2017-03-22
BRAY (CHINA) CONTROLS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a test analysis method for the sealing pair of a triple eccentric butterfly valve and a triple eccentric butterfly valve, so that the defect of uneven interference of the sealing pair of the existing triple eccentric butterfly valve can be solved

Method used

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  • Test analysis method for tri-eccentric butterfly valve sealing pair and tri-eccentric butterfly valve

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Embodiment 1

[0022] Embodiment 1: The present invention discloses a test and analysis method for the sealing pair of a triple eccentric butterfly valve (see attached figure 1 ), the triple eccentric butterfly valve includes a valve body 1, a valve plate 3, an annular metal valve seat 4 and a sealing ring 5; the metal valve seat 4 is fixed in the valve body 1; the valve plate 3 is installed on the metal valve In the seat 4, the valve rod 2 is pierced radially in the valve plate 3, and the sealing ring 5 is fixed on the outer peripheral edge of the valve plate 3; the valve seat 4 and the sealing ring 5 cooperate to form a sealing pair, and the sealing ring 5 is provided with a contact surface; it is characterized in that the triple eccentric butterfly valve is also provided with a retaining ring 6, the retaining ring 6 is set on the inner ring of the valve seat 4, and the retaining ring 6 contacts the sealing ring 5 and seals Circle 5 is limited; And comprises the following steps:

[0023] ...

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Abstract

The invention discloses a test analysis method for a tri-eccentric butterfly valve sealing pair. The method comprises the following steps: 1) rotating a valve plate, so that a sealing ring is completely fitted with a valve seat; 2) dividing the clearance between the valve plate and the sealing ring into 12 uniform points clockwise; 3) measuring clearance values of points 3, 6, 9 and 12 by using a pin gauge; 4) preliminarily adjusting the clearances between the valve plates and the points 3, 6, 9 and 12 of the sealing ring, so that the values of the clearances are consistent, and the difference of different points is smaller than or equal to 10% of the mean of each point; 5) measuring the clearance values of points 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12 by using the pin gauge again; and 6) accurately adjusting the clearance between the valve plate and each point of the sealing ring, so that the values of the clearances are consistent, the difference of different points is smaller than or equal to 10% of the mean of each point, the sealing pair has uniform interference, and the defect of non-uniform interference of the existing tri-eccentric butterfly valve sealing pair is overcome.

Description

technical field [0001] The invention relates to the field of triple eccentric butterfly valve production and manufacturing, in particular to a test analysis method for a triple eccentric butterfly valve sealing pair and a triple eccentric butterfly valve. Background technique [0002] The triple eccentric butterfly valve is a metal hard-sealed butterfly valve with three geometric eccentric structures. It is sealed by torque. The sealing form is a face seal. Through the self-positioning of the sealing pair, the surface-to-surface contact can be better realized. In the actual assembly process, there are differences in each point of the sealing pair. The radial component force of the sealing pair leads to uneven interference between the sealing pairs, resulting in increased closing torque and poor sealing. Contents of the invention [0003] The invention provides a test and analysis method for a sealing pair of a triple eccentric butterfly valve and a triple eccentric butterf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B5/00G01B5/14
CPCG01B5/00G01B5/14
Inventor 潘行泰杨光李玉龚凤英李辉文
Owner BRAY (CHINA) CONTROLS CO LTD
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