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A method for detecting the sealing separation of flange seals

A flange sealing and detection method technology, applied in the direction of measuring devices, instruments, etc., can solve problems such as leakage of connecting parts, sealing failure, etc., and achieve the effect of high operability and simple and convenient detection method

Active Publication Date: 2015-11-18
SUZHOU BMC SEALING TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the amount of separation exceeds a certain critical value, the effective value of the sealing stress also reaches a critical value, and the connecting parts will leak, and even the seal will be blown out, resulting in the failure of the seal

Method used

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  • A method for detecting the sealing separation of flange seals
  • A method for detecting the sealing separation of flange seals
  • A method for detecting the sealing separation of flange seals

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0020] see Figure 1~2 As shown, a detection system needs to be set up to detect the sealing separation between the flange and the seal. Firstly, a displacement transmission plate 3 is set between the equipment flange 1 and the end cover flange 2, the end surface adjacent to the end cover flange 2 and the displacement transmission plate 3 is a concave surface, and the equipment flange 1 has an equipment chamber 11, the equipment The mouth of the chamber 11 is opposite to the displacement transmission plate 3 , and the working medium is filled in the bore of the equipment chamber 11 in the working state. There is also a seal 4 between the displacement transmission plate 3 and the equipment flange 1, which is fixedly connected to the equipment flange 1 and the end cover flange 2, so that the displacement transmission plate 3 is fixed between the equipment flange 1 and the end cover flange 2 , and apply a certain pretightening force to make the sealing connection between the e...

specific Embodiment 2

[0027] see image 3 , Figure 4 Shown is another embodiment of the present invention, the difference between this embodiment and embodiment 1 lies in the arrangement of the detection component 7 . In this embodiment, the detection assembly 7 is set as a third displacement sensor 75 fixedly installed on the bracket 6, and the end cover flange 2 is provided with a fourth through hole 24 penetrating in the axial direction, and the third displacement sensor 75 can penetrate Through the fourth through hole 24 to detect the axial displacement of the displacement detection point C, the detection result T of the third displacement sensor 75 3 It is collected by the data acquisition system 8, so that the seal separation between the equipment flange 1 and the seal 4 can be obtained directly, that is, the seal separation of the flange seal is T=T 3 . Compared with Embodiment 1, the detection method using this method is relatively simple, but the requirements for the third d...

specific Embodiment 3

[0029] see Figure 5 Shown is another embodiment of the present invention, the difference between this embodiment and embodiment 2 lies in the setting of the sealing member 4, in this embodiment, what the sealing member 4 adopts is a non-metallic washer, and the non-metallic washer is set A surface seal is formed between the displacement transmission plate 3 and the equipment flange 1 and between the equipment flange 1 . Certainly, the non-metallic gasket needs to be arranged between the displacement transmission plate 3 and the equipment flange 1 according to the structural characteristics of the non-metallic gasket itself.

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Abstract

The invention discloses a method of detecting sealing separation of a flange seal. The method includes: a displacement transfer plate is disposed between an equipment flange and an end cover flange; space between the displacement transfer plate and the end face of the equipment flange is sealed by a seal; the seal contacts with one end face of the equipment flange in a face sealed or line sealed manner; the end face of the displacement transfer plate, adjacent to the end cover flange, is provided with a displacement detection point which has the same axial displacement as a point at the medium diameter part of the seal on the same cross section; the axial displacement of the displacement detection point is detected by a detection component; detection results are collected by a data collection system; accordingly, sealing separation between the flanges and the seal is obtained conveniently, and research basis for the search on the relation of sealing separation to seal leakage of the flange seal is provided. The method is simple, convenient, and highly operable.

Description

technical field [0001] The invention relates to a method for detecting the sealing separation amount of a flange seal. Background technique [0002] In the sealing working environment of equipment flanges and end cover flanges in nuclear power, chemical industry, oil refining, petrochemical, metallurgy, shipbuilding, energy and other industrial sectors, under the action of medium pressure, temperature and other factors, the axial force generated by medium pressure And under the condition that the fastening bolts relax with the increase of temperature, the two connecting flanges tend to separate and open, forming a certain amount of separation, reducing the effective compression of the seal, and causing the attenuation of the sealing stress of the seal. When the amount of separation exceeds a certain critical value, the effective value of the sealing stress also reaches a critical value, and the connecting parts will leak, and even the seal will be blown out, resulting in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/16
Inventor 马志刚董亚超韩嘉兴白杉朱建强刘青松毛华平赵月扬侯敏吴昊
Owner SUZHOU BMC SEALING TECH CO LTD