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原油管线一般采用加热方式输油。管线运行一段时期后,管道外防腐绝缘层会逐年老化,影响管线正常运行,因此需要有计划地安排防腐层大修。大修时,热油管线与土壤建立的稳定温度场遭到破坏,为了保证管线安全生产运行,常常需要对管线周围土壤温度场进行测量。以便监测管道内原油温度的变化。在本文中,详细查阅了大量有关热电偶和土壤温度场的资料,掌握了热电偶测温原理及测温方法,并在实践中进行应用。通过查阅前人关于土壤温度场的研究,对管道周围土壤温度的分布情况有了较为深刻的理解和认识。并分析了采用热电偶测温装置测得的土壤、大气温度数据,得到了管道周围土壤温度场分布的一般规律及其影响因素。
Crude oil pipelines generally use heating oil. After a period of operation of the pipeline, the anti-corrosion insulation layer outside the pipeline will age year by year, affecting the normal operation of the pipeline. Therefore, overhauls of the overburden need to be arranged in a planned way. Overhaul, the steady temperature field of hot oil pipeline and soil is destroyed, in order to ensure the safe operation of the pipeline, often need to measure the soil temperature field around the pipeline. In order to monitor changes in crude oil temperature in the pipeline. In this paper, a detailed review of a large number of thermocouples and soil temperature field data, master the thermocouple temperature measurement principle and temperature measurement method, and in practice. Through reviewing predecessors’ research on soil temperature field, we have a more profound understanding and understanding of the distribution of soil temperature around the pipeline. The soil and atmosphere temperature data measured by the thermocouple temperature measuring device were analyzed. The general law of the temperature field distribution around the pipeline and its influencing factors were obtained.