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Flange sealing structure

A flange sealing and sealing structure technology, applied in the direction of flange connection, pipe/pipe joint/pipe fitting, through components, etc., can solve the problems of smaller flange torque and reduced flange sealing performance, and achieve sealing performance without reduced effect

Pending Publication Date: 2021-12-28
常州三众弹性技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of the prior art, and provide a flange sealing structure, which can solve the problem in the prior art that the overall sealing performance of the flange is reduced due to the decrease of the torque of the flange

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The performance evaluation of the sealing structure of the present invention adopts the flange sealing structure of the following characteristics: the nominal diameter of the flange is 200mm, the polymer plastic part adopts polyperfluoroethylene propylene resin, adopts liquid nitrogen as the low temperature medium, and helium as the detection medium ( P 1 =2MPa), test its low-temperature leakage, high-temperature leakage test is carried out in a 300°C oven.

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Abstract

The invention provides a flange sealing structure. The sealing structure comprises a first flange; a second flange, wherein the opposite end faces of the second flange and the first flange are fixedly connected, and the first flange and the second flange are the same in structure and size; a first clamping groove which is arranged on a connecting end face of the first flange; a second clamping groove which is arranged on a connecting end face of the second flange, and the first clamping groove and the second clamping groove are symmetrically arranged; a sealing seat comprising a first sealing seat and a second sealing seat; a high-molecular plastic part which is embedded into a metal elastic body and is positioned at the abutting part of the first sealing seat and the second sealing seat with the metal elastic part; and wherein the cross section of the first clamping groove and the cross section of the second clamping groove are rectangular, the elastic modulus of the metal elastic part is 2 * 10 < 5 >-2.5 * 10 < 5 > N / mm < 2 >, and the sealing force of the sealing structure cannot be reduced along with time.

Description

technical field [0001] The invention relates to the technical field of flange sealing, in particular to a flange sealing structure. Background technique [0002] The ordinary flange sealing structure in the prior art generally uses a sealing ring on the flange sealing surface and cooperates with the tightening torque of the bolts to clamp the sealing ring to seal the flange, but with the increase of time , the torque of the bolts will gradually relax, which will lead to the inability to clamp the sealing ring well and cause the sealing failure of the flange. The sealing performance of the flange decreases, which greatly affects the overall sealing effect of the flange, resulting in the leakage of the fluid conveyed in the pipeline. Contents of the invention [0003] The purpose of the present invention is to overcome the defects of the prior art, and provide a flange sealing structure, which can solve the problem in the prior art that the overall sealing performance of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L23/032F16L23/02F16L23/18
CPCF16L23/032F16L23/02F16L23/18
Inventor 孙法国
Owner 常州三众弹性技术有限公司