万家寨水电站取消发电引水管道伸缩节的焊接时机选择  

The choice of time to weld for abrogating telescopic joints of penstock on Wanjiazhai waterpower station

作　　者：王春涛[1] 李振富[1] 

机构地区：[1]天津大学水利水电工程系,天津300072

出　　处：《水力发电学报》2004年第4期55-59,共5页Journal of Hydroelectric Engineering

摘　　要：目前不少水电站因为管道漏水等问题而取消伸缩节 ,在取消伸缩节时最后一条焊缝的焊接环境温度选择是非常重要的。针对这个问题 ,本文结合万家寨水利枢纽工程 ,采用三维有限元模型 ,详细分析了在各种焊接环境温度条件下钢管的应力状态 ,提出了合适的焊接环境温度范围。研究表明以Up to now in many waterpower stations the telescopic joints of penstock have been abrogated because of water leaking.It is very important to determine the jointing environment temperature of the last seal for abrogating the telescopic joints.Using 3 D FEA model,the detailed analysis of the stress status of penstock in all kinds of jointing environment temperature conditions and the suitable jointing environment temperature range are presented in this paper.The research shows that May is the suitable time to weld the penstock.

关 键 词：水工结构 焊接环境温度 有限元整体分析 伸缩节 钢管应力 

分 类 号：TV31[水利工程—水工结构工程]