高压聚乙烯反应管声发射检测与评定  

Acoustic inspection and integrity assessment for ultrahigh pressure polyethylene reaction tube

作　　者：薛青利[1] 刘康林[2] 陈明根 戴光[4] 

机构地区：[1]福建炼油化工有限公司,福建泉州362100 [2]福州大学化学工程系,福建福州350002 [3]江西吉安煤气公司,江西吉安343000 [4]大庆石油学院石油机械工程系,黑龙江安达151400

出　　处：《石油化工设备》2002年第2期47-49,共3页Petro-Chemical Equipment

摘　　要：采用时差定位法确定声源的位置 ,进而检测了反应管内的活性缺陷情况。针对反应管在内压作用下 ,管壁出现屈服时会产生大量低幅值连续信号的现象 ,利用区域定位法确定声源的区域 ,通过对两个通道的区域定位信号进行统计分析 ,得到声发射事件 -压力曲线 ,并由该曲线确定了反应管的屈服内压。据实测结果对反应管的安全状况进行了评定。The mobile defects are detected by the approach of tim e difference location,and the autofrettaged residual stress of inner surface of the reactor is measured by regional location approach.The principle of residual stress measurement by acoustic inspection technique is as follows:As the inner surface of the reactor begins to yield,there may be a greatdeal of low amplitude continuity signals emerged.Determ ining the location of sound source by regional location approach,and statistically analyzing the regional events of two channels,∑ event- p curve is obtained.Since the yielding pressure of the reactor corresponding to the point at which∑ event- p curve begins to rise abruptly,the yielding pressure may be determined by this curve.Substituting the yield pressure into the relationship between yielding pressure and residual stress,the residual stresses are then obtained.Basing upon the m easured residual stresses and the results of mobile defects,the safety and integrity of the reactor are analyzed and assessed.

关 键 词：反应器 无损检测 残余应力 安全分析 高压聚乙烯 反应管 声发射 评定 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业] TQ320.51