某电厂冷启动蒸汽疏水管道三通开裂问题治理  

The Government of Cracking Problems of Tee Welding in Cold Start Steam Drain Water Piping in Given Power Plant

作　　者：田成川[1] 胡冰[2] 

机构地区：[1]辽宁省电力有限公司电力科学研究院,辽宁沈阳110006 [2]北方重工集团有限公司,辽宁沈阳110141

出　　处：《东北电力技术》2012年第7期50-52,共3页Northeast Electric Power Technology

摘　　要：某电厂3号机组冷启动蒸汽疏水管道与冷启动蒸汽管道连接处三通焊口,运行过程中短时间多次开裂,经过多次补焊处理,效果仍不理想。经分析此三通焊口开裂的主要原因为焊口处二次应力严重超标。经对管道的综合改造,解决了该三通焊口开裂的问题。Tee welding connected by cold start steam drain water piping and cold start steam pipe of given power plant cracked many times during the operation process. In spite of welding treatments, the effect of which is not satisfied. In the following month, the tee welding still kept cracking. After analysis, the main reason of the tee welding craze is due to excessive secondary stress level. Through the analysis of pipe comprehensive reform, the problem is solved.

关 键 词：管道 支吊架 应力分析 二次应力 热膨胀 

分 类 号：TK223.1[动力工程及工程热物理—动力机械及工程] TM621.72[电气工程—电力系统及自动化]