薄壁聚乙烯内衬在钢管道缝隙处的力学行为  

Mechanical Behaviors of Thin-walled Polyethylene Lining at the Gaps of Steel Pipeline

作　　者：王立君[1] 谢广禄[2] 莫晓燕[1] 李首梦[1] 

机构地区：[1]天津大学材料科学与工程学院,天津300072 [2]大港油田天然气公司,天津300280

出　　处：《压力容器》2004年第7期28-30,34,共4页Pressure Vessel Technology

摘　　要：用非开挖方式向钢管道内穿插薄壁聚乙烯内衬是目前可选择的恢复旧燃气管道使用功能的最好方法。穿插施工的分段作业使得聚乙烯内衬不可避免地要从管内跨越若干管道缝隙。缝隙处的聚乙烯内衬因无钢管支撑而独自承受管道内压 ,其承载行为将影响穿插结构的安全。本文的计算分析表明 ,在管道内压作用下 ,该穿插结构的径向膨胀变形主要集中在缝隙处的聚乙烯内衬上 ,且管道缝隙尺寸、管道内压和内衬壁厚对穿插结构的承载行为均有显著影响 。It is a best method selected possibly nowadays for recovery of function of an old gas pipeline to insert a thin-walled polyethylene lining into a steel pipeline by the way of non-excavation. The partition insertion in the process makes the polyethylene lining span inevitably, inside the pipeline, some gaps at host pipe joints. Because of none of any support of host pipe, the thin-walled polyethylene lining at gaps has to resist the internal pressure independently, the mechanical performance of which will affect the safety of insertion structure. The calculation analysis in this paper shows that the radial distension deformation in insertion structure concentrates mainly at the polyethylene lining at gaps, and the mechanical performances of insertion structure are influenced markedly by the gap size, internal pressure and thickness of lining. So a detailed quantitative design for it is required before the insertion working.

关 键 词：聚乙烯 穿插内衬 有限元 管道 

分 类 号：TB322[一般工业技术—材料科学与工程] TQ055.8[化学工程]