Online monitoring device for structural damage of high temperature pressure pipeline

Abstract

The invention relates to an online monitoring device for structural damage of a high temperature pressure pipeline. The online monitoring device is realized by settings of hardware and software control. The hardware settings comprise a welded high temperature strain gauge, a lead, a lead seat, an annular fixed bracket, a connecting bolt, a lead fixing cassette, a thermal insulating layer and the like; and the software settings are mainly concentrated on an upper computer of a test terminal. The software system takes a damage identification module as a center, collects damage characteristic physical quantity in real time, calculates damage factors DI (t) by adopting the damage module in real time, and judges the damage degree of a sensing path with the damage factors. According to the invention, the online monitoring device can carry out online monitoring on the damage of various metal pressure pipelines in complicated environments, can accurately identify and position multiple damage, and has the characteristics of being high in sensitivity, convenient to install and the like.

Description

technical field [0001] The invention relates to a method in the technical field of damage detection of in-service high-temperature pressure pipelines, in particular to an online monitoring device for structural damage of high-temperature pressure pipelines. Background technique [0002] In modern industry, high-temperature pressure pipelines are widely used in chemical industry, petroleum enterprises, power plants, etc., and their safety and reliability are an important guarantee for preventing pipeline leakage and explosion accidents. Due to factors such as high temperature creep and corrosion thinning of the pipe wall, the structure of the pressure pipe is damaged. Early damage is caused by micro-damage cracks, and the creep damage of materials at stress concentration parts accumulates to a certain extent to form macro-cracks, which are likely to rapidly develop into large damages in complex environments, often leading to major safety accidents and greater economic impact....

AI Technical Summary

Problems solved by technology

There are many sensing devices used to measure damage and deformation. For example, a high-temperature creep monitoring system for main steam pipes of power plant boilers 201020270797.4 uses a high-resolution camera to monitor the strain of thin slices, but the image signal is greatly affected by the working environment. easily distorted

For example, in-service long-distance oil and gas pipeline stress-strain non-destructive monitoring device 201120181082.6, but these devices are generally only suitable for strain measurement in normal temperature working environments, and do not meet the requirements for online monitoring of equipment in high-temperature environments

At present, there are extensible sensor devices for high-temperature pipeline strain monitoring technology, but these devices require high system stability and precision, and the cumulative error is large, which affects the measurement results.

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