高温再热器出口管道对空排气管座裂纹原因分析及解决措施  

Analysis and Disposal on Crack Causation of Exhaust Pipe to Steam of High Temperature Reheater Output Pipe

作　　者：薛永波[1] 孟林辉 李中伟[2] 张东文[2] 赵纪峰[2] 李青松[2] 

机构地区：[1]河北国华沧东发电有限责任公司,河北沧州061110 [2]河北省电力研究院,石家庄050021

出　　处：《河北电力技术》2009年第6期37-38,共2页Hebei Electric Power

摘　　要：对河北国华沧东发电有限责任公司高温再热器出口管道对空排气管裂纹原因进行分析,认为冷凝水倒流、管接头变径坡度过大及管系振动是形成该热疲劳裂纹的主要原因,并提出更换现有管座、减少异径管坡度、调整管道支吊架等解决措施。After analysis on the crack causation of the exhaust pipe to steam of high temperature reheater export pipe in Hebei Guohua Cangdong Power Plant, this paper concludes the stress concentrate in the pipe reducer due to the larger the reducer ratio of slope, which leads to the back flowing of the cooling water, presents the settlements from the aspects of changing the existing pipe, reducing the grade of pipe diameter, and relugating pipe bracket.

关 键 词：低周疲劳裂纹 高温再热器管 对空排气管 应力集中 

分 类 号：TK223.3[动力工程及工程热物理—动力机械及工程]