本文選題：管道泄漏 + 熱力管道非開挖檢測　； 參考：《南昌航空大學》2017年碩士論文

【摘要】：隨著我國北方供熱管線管齡的增長,近年來城市熱力管道出現(xiàn)了較多腐蝕泄漏問題,給城市供暖造成困難,且給供暖企業(yè)帶來較大的經(jīng)濟損失。但目前,國內(nèi)許多城市在供暖管道的泄漏定位方面特別缺乏專用的檢測設備。針對上述情況,首先,課題通過對磁-溫梯度檢測原理進行相關的探討和對熱力管道失效原因進行分析,從理論上確立了磁-溫梯度檢測方法對城市供熱管道泄露定位進行在役非開挖檢測具有可行性。其次,對熱力管道發(fā)生泄露時的磁場和溫度信號進行計算機仿真,發(fā)現(xiàn)熱力管道泄漏時,磁場信號和溫度信號均發(fā)生了一定的變化,從理論數(shù)據(jù)上證明了熱力管道在發(fā)生泄漏時通過探測磁場和溫度信號的變化對泄漏點進行定位具有可能性。第三,在提離1.5m的情況下對含有特定刻槽缺陷的管道進行弱磁檢測實驗,證明弱磁檢測對埋地熱力管道泄漏點定位具有可靠性,定位誤差在30cm以內(nèi)。且研究了熱力管道三種典型狀態(tài)在計算機仿真下的磁-溫梯度變化特點,并結合熱力管道三種典型狀態(tài)下的現(xiàn)場檢測數(shù)據(jù)進行分析,論證了磁-溫梯度檢測技術在熱力管道檢測中的優(yōu)越性。在此基礎上,研制出一套熱力管道非開挖檢測儀器。最后,去往北方多個城市進行熱力管道實地檢測,在進行檢測數(shù)據(jù)綜合分析后,對泄漏點進行定位并開挖驗證。開挖結果表明,基于磁-溫梯度檢測技術研制的熱力管道檢測儀器對埋地熱力管道和露天的管溝敷設式熱力管道的泄漏點進行定位的可靠性較高,其對泄漏點定位與實際位置偏差在0.30m以內(nèi),完全滿足現(xiàn)場實際需求。課題為城市熱力管道的泄漏檢測提供了一種新型的檢測方法,即結合弱磁檢測技術和紅外測溫檢測技術的磁-溫梯度檢測方法。該方法對復雜的路面環(huán)境具有良好的適應性,能適用于大部分熱力管道的泄漏檢測。
[Abstract]:With the increase of heating pipe age in northern China, there have been many corrosion and leakage problems in urban heating pipeline in recent years, which cause difficulties to urban heating and bring large economic losses to heating enterprises. But at present, many cities in our country lack special detection equipment in the leakage location of heating pipes. In view of the above situation, first of all, the paper discusses the principle of magnet-temperature gradient detection and analyzes the failure reason of thermal pipeline. The magnetic-temperature gradient detection method is theoretically established to detect the leakage location of urban heating pipeline without excavation in service. Secondly, the magnetic field and temperature signal of thermal pipeline leakage are simulated by computer, and it is found that both magnetic field signal and temperature signal have changed. It is proved from the theoretical data that it is possible to locate the leakage point by detecting the change of magnetic field and temperature signal when the thermal pipeline leaks. Thirdly, in the case of 1.5 m lift, the weak magnetic field detection experiment is carried out for the pipeline with special groove defect, which proves that the weak magnetic detection is reliable for the location of leakage point of buried thermal pipeline, and the positioning error is within 30cm. The variation characteristics of magnet-temperature gradient of three typical states of thermal pipeline under computer simulation are studied, and the field detection data of three typical states of thermal pipeline are analyzed. The superiority of magnetic-temperature gradient detection technology in thermal pipeline detection is demonstrated. On this basis, a set of non-excavation testing instrument for thermal pipeline has been developed. Finally, the thermal pipeline field inspection is carried out in many cities in the north. After comprehensive analysis of the test data, the leakage point is located and verified by excavation. The excavation results show that the reliability of detecting the leakage points of buried thermal pipelines and open-air trench laying thermal pipelines is high, which is based on the magnetic temperature gradient detection technology. The deviation between the leak location and the actual location is less than 0.30m, which fully meets the actual demand of the site. The subject provides a new detection method for the leakage detection of urban thermal pipeline, that is, the magnet-temperature gradient detection method combined with the weak magnetic field detection technology and the infrared temperature detection technology. This method has good adaptability to complex pavement environment and can be applied to the leakage detection of most thermal pipelines.
【學位授予單位】：南昌航空大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU995

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本文編號：1917732