Method for detecting leakage from heat distribution pipeline with heat preservation structure

Abstract

The invention relates to the technical field of heat distribution pipeline leakage detection, in particular to a method for detecting leakage from a heat distribution pipeline with a heat preservation structure. The method comprises the following steps: step 1, after the heat distribution pipeline with the heat preservation structure is subjected to leakage, initiating a heat conduction and heat exchange process composed of pipeline wall slit jet impact heat exchange as well as heat conduction and heat exchange on a heat preservation layer; step 2, analyzing the distribution of flow fields formed by the impact jet from a pipeline wall slit nozzle on an impact surface; and step 3, measuring the distribution of temperature fields on the heat distribution pipeline through infrared heat radiance, and acquiring a changing process of temperature fields in the axial direction of the heat distribution pipeline. The method provided by the invention is free of contact, high in detection sensitivity and accuracy, and definite in principle, and has the advantages that whether the heat distribution pipeline is subjected to leakage or the temperature change is caused by damage of a heat preservation structure can be visually and accurately determined, and both safety dangers and running risks caused by the leakage from the heat distribution pipeline can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of thermal pipeline leakage detection, and relates to a thermal pipeline leakage detection method with a thermal insulation structure. Background technique [0002] With the increasing demand for electricity in our country and the complexity of power equipment, the reliability and safety requirements of power equipment are also getting higher and higher. As one of the important components of the thermal power plant, the safety and reliability of the thermal pipeline are the most concerned issues of the technical departments of the power plant, which not only affects the safe operation of the power plant, but also poses safety hazards to the on-site staff. In recent years, cracks have been found many times in the heat pipes of some thermal power plants, which directly affects the normal load operation of the power plant. As the operating parameters of thermal power plants increase, more and more high-tempera...

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Problems solved by technology

[0003] The present invention provides a thermal pipeline leakage detection method with a thermal insulation structure, which overcomes the deficiencies of the prior art and can effectively solve the problems that the existing thermal pipeline detection technology cannot find out the cause of the abnormal temperature change of the thermal pipeline and cannot Problems of Determining the Specific Location of the Leakage Point of the Thermal Pipeline

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