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Device and method for online leakage monitoring of double-layer metal expansion joint

A double-layer metal and monitoring device technology, which is applied to expansion compensation devices for pipelines, pipes/pipe joints/fittings, pipeline systems, etc., can solve the problem that the monitoring solution cannot be monitored online, so as to ensure online safety and guarantee Effects of safe operation and leakage avoidance

Pending Publication Date: 2019-10-18
CNNC FUJIAN FUQING NUCLEAR POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When any one of the inner and outer layers of the double-layer metal expansion joint is damaged independently, the current monitoring scheme cannot monitor it online

Method used

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  • Device and method for online leakage monitoring of double-layer metal expansion joint
  • Device and method for online leakage monitoring of double-layer metal expansion joint
  • Device and method for online leakage monitoring of double-layer metal expansion joint

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Embodiment Construction

[0043] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0044] Such as image 3 An online leakage monitoring device for a double-layer metal expansion joint is shown, which is used to monitor the damage of the double-layer metal expansion joint 8, including an equal-diameter tee joint 9, a pressure pipe 10, a valve A11, a pressure gauge joint 12, and a pressure gauge 13. Valve B14.

[0045] Such as figure 1 , figure 2 As shown, the double-layer metal expansion joint 8 is divided into an outer layer 3 and an inner layer 4, and the outer layer 3 and the inner layer 4 are both bellows structures, which serve as the boundary of the pressure pipe and are used for the thermal expansion and contraction of the pipe. Axial compensation effect.

[0046] The double-layer metal expansion joint 8 is arranged vertically along the axial direction, the ear plate 1 is located at the lower part of the ...

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Abstract

The invention relates to the technical field of nuclear power maintenance, and particularly discloses a device and method for online leakage monitoring of a double-layer metal expansion joint. Onlinepressure monitoring is carried out between an inner layer and an outer layer of the double-layer metal expansion joint, compared with initial pressure, online monitoring on damage of any single layerof the double-layer metal expansion joint can be realized, the damaged double-layer metal expansion joint can be repaired in time, the leakage of the double-layer metal expansion joint is avoided, on-line safety of the double-layer metal expansion joint is ensured, and the safe operation of a pipeline is ensured.

Description

technical field [0001] The invention belongs to the technical field of nuclear power maintenance, and in particular relates to an online leakage monitoring device and method for a double-layer metal expansion joint. Background technique [0002] The structure of the double-layer metal expansion joint is as follows: figure 1 , figure 2 As shown, it is the boundary of the pressure pipe, which acts as an axial compensation for the thermal expansion and contraction of the pipe, and its damage will cause the medium leakage of the pressure pipe. For example, if the double-layer metal expansion joint used in the secondary circuit of a nuclear power plant is damaged, it will cause steam leakage in the secondary circuit of the conventional island of the nuclear power plant, resulting in shutdown of the nuclear power plant. At the same time, a large amount of steam will be generated in the nuclear power plant building, which may cause false alarms from the fire alarm probe. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L51/02F17D5/02
CPCF16L51/02F17D5/02
Inventor 喻松李京胡文盛吴起洪均张潇宇马旺发许洪川郝立民
Owner CNNC FUJIAN FUQING NUCLEAR POWER
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