无砟道岔热流体加热融雪方式影响因素分析  

作　　者：杜跃飞 

机构地区：[1]中铁电气化局集团有限公司设计研究院

出　　处：《电气化铁道》2023年第S02期134-137,140,共5页Electric Railway

摘　　要：针对电加热道岔融雪系统在应用中存在融雪不充分、维护量大的问题,提出了一种采用热流体加热的道岔融雪方法。以18号道岔为研究对象,基于COMSOL Multiphysics创建道岔融雪传热模型,验证-5℃环境温度下采用热流体道岔融雪方式时埋管间距和环境因素对道床温度分布和融雪效果的影响。结果表明:环境温度为-5℃时1 h内热流体加热融雪方式可以融化80%厚度为3 cm的积雪;埋管深度为15 cm,管间距为12 cm条件下双管双向蛇形管道设计使道床深度5 cm处的温度均匀分布在14~16℃。With regard to the problems of insufficient snow melting and heavy maintenance work in the application of the electric heating switch snow melting system,a snow melting method for switch using thermal fluid heating is put forward.Taking the switch of No.18 as the research object,an intelligent snow melting heat transfer model is established on the basis of the COMSOL Multiphysics to verify the influense of buried pipe spacing and environmental factors on the temperature distribution and snow melting effect of the track bed when using the thermal flow switch snow melting method at-5℃.The results show that the thermal fluid heating method can melt 80%of the 3 cm thick snow within 1 hour at an ambient temperature of-5℃.Under the condition of a buried depth of 15 cm and a pipe spacing of 12 cm,the design of a double pipe bidirectional serpentine pipeline ensures that the temperature at a depth of 5 cm in the track bed is evenly distributed between 14 and 16℃.

关 键 词：道岔融雪 热流体 传热模型 影响因素 

分 类 号：U284.7[交通运输工程—交通信息工程及控制]