无补偿冷安装直埋敦设供热管道的理论分析和模拟研究

发布时间：2018-01-10 05:20

本文关键词：无补偿冷安装直埋敦设供热管道的理论分析和模拟研究　出处：《西安建筑科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着技术水平的快速提高,城镇集中供热系统规模不断的扩大,城镇热水供热管道直埋敷设技术也变得越来越成熟。其中,无补偿冷安装直埋敷设供热管道施工难度小,成本低,是值得推广的敷设方式。对于无补偿冷安装直埋敷设管道的安全性,没有相关的大量文献可供参考,但是从一些采用了无补偿冷安装直埋敷设方式的城市案例来看,使用效果良好。本文据此展开研究。首先,对直埋供热管道的发展背景、敷设方式以及应力分析进行系统、详细的介绍;其次,采用安定性分析方法对无补偿冷安装直埋敷设方式进行受力计算和稳定性验算,验证其理论可行性;最后,针对热力公司反映的实际问题——供热管道在供热时热伸长不明显,采用模拟软件对其进行仿真模拟并用实际测量数据进行验证,构成了一个完整的课题研究体系。最后得出主要结论:由于焊接时,焊接面存在的微小角度折角,导致供热管道的热伸长量减小;随着微小角度折角的逐渐增大,管道的热伸长量逐渐变小;随着土壤埋设深度的增加,管道的热伸长量逐渐减小,管道的应力逐渐变大;随着管道直径的增大,管道的热伸长量逐渐变小,趋于稳定;对多折角管道的热伸长量分析可知,角度的选取突破了《规程》中对折角的最大取值角度的限制范围。
[Abstract]:With the rapid improvement of technology, the scale of urban central heating system is expanding, and the technology of direct laying of hot water heating pipeline has become more and more mature. Uncompensated cold installation direct buried heating pipeline construction is less difficult, low cost, is worth popularizing. For the safety of direct buried pipeline without compensation cold installation, there is no relevant literature for reference. However, from some urban cases of direct buried installation without compensation cold installation, the application effect is good. Based on this, the research is carried out. Firstly, the development background of direct-buried heating pipeline is discussed. Laying methods and stress analysis system, detailed introduction; Secondly, the method of stability analysis is used to calculate the force and stability of the direct buried installation without compensation, which verifies its theoretical feasibility. Finally, in view of the actual problem reflected by the heating company that the heat elongation of the heating pipeline is not obvious, the simulation software is used to simulate it and the actual measurement data is used to verify it. Finally, the main conclusions are as follows: due to the small angle angle in welding, the heat elongation of heating pipeline is reduced; With the increase of the angle of the small angle, the heat elongation of the pipeline becomes smaller. With the increase of soil embedding depth, the thermal elongation of pipeline decreases gradually, and the stress of pipeline becomes larger. With the increase of pipe diameter, the thermal elongation of pipeline becomes smaller and more stable. According to the analysis of the thermal elongation of multi-fold angle pipeline, the selection of angle breaks through the limit range of the maximum angle of folding angle in the regulation.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU995.3

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