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暖通空调杂志社>期刊目次>2018年>第9期

基于土壤温湿度的埋地供热管道泄漏检测方法

Leakage detection method of buried heating pipelines based on soil temperature and humidity

吴晋湘[1] 王彦逍[1] 赵 涛[1] 韩为明[1] 王向伟[2]
[1]河北工业大学 [2]承德热力集团有限责任公司

摘要:

根据实际检测埋地供热管道泄漏过程中经常遇到的问题,分析了埋地供热管道泄漏和保温层破损时土壤表面温度场和管道上方土壤的湿度变化。依照实际工程中热力管道的运行模式,建立了埋地供热管道热力运行的简化试验平台。对保温层完好,保温层上方、侧方和下方破损,以及管道上方、侧方和下方泄漏等工况进行试验研究。利用红外热像仪和土壤湿度速测仪等记录试验过程中土壤的温度、湿度信息,分析管道泄漏和保温层破损时传热传质对管道上方土壤温湿度的影响规律,为实际供热运行中管道泄漏的检测与判断提供更准确的依据。

关键词:供热管道,泄漏,土壤温度,土壤湿度,检测方法,保温层

Abstract:

According to the practical problems in the leakage test of buried heating pipelines, analyses the soil surface temperature field and the soil moisture change above the pipeline when the leakage of the buried heating pipeline exists and the thermal insulation layer is damaged. According to the operation mode of thermal pipeline in practical engineering, sets up a simplified experimental platform for thermal operation of buried heating pipeline. Carries out the experiments on the intact insulation layer, the damage of the upper, lateral and lower sides of the insulation layer, and the leakage at the upper, lateral and lower sides of the pipelines. Records the temperature and humidity information of the soil during the experiment by infrared thermal imager and soil moisture analyzer, analyses the influence of heat and mass transfer on the soil temperature and humidity at the top of the pipeline when the pipeline leaks or the insulation layer is damaged, providing the more accurate and scientific basis for the detection and judgment of pipeline leakage in actual heating operation.

Keywords:heatingpipeline,leakage,soiltemperature,soilmoisture,testmethod,insulationlayer

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