新制加氢反应器水压试验过程的声发射检测

Acoustic Emission Testing for New Hydrogenation Reactor During Water Pressure Experiment

为发现新制压力容器的先天性活性缺陷,提高制造质量,对一台新制加氢反应器水压试验过程进行声发射检测。采用三角定位与线定位结合的方法,对加氢反应器壳体和接管进行了整体检测。采用二次加载的方式,重点分析第二次加载过程和保压阶段的声发射信号。检测过程共发现3处有效声源,通过采用超声波和渗透探伤方法进行复验,确定声源Sl为流动噪声;声源S2为鞍座与筒体间的机械摩擦信号;声源S3为弯管内堆焊层表面缺陷。该检验实例可为新制容器出厂前的全面检验提供借鉴。

In order to find congenital defects in new pressure vessels in time and improve container＇s manufacturing quality, a new hydrogenation reactor during water pressure experiment with acoustic emission technique was tested. Using triangulation and line positioning method, the hydrogenation reactor＇s shell and pipe was detected in whole. Focus was put on monitoring acoustic emission source localization signal in the second loading cycle and packing phase. During the testing process 3 effective acoustic sources in total was discovered. Through using ultrasonic test and liquid penetrant test in foundation of acoustic emission testing, result was assurance as follows： acoustic sources S1 was the flow noise, acoustic sources S2 was the mechanical friction signal between saddle and cylinder while loading, acoustic sources S3 was surface defects in bent pipe＇s layer. This instant testing could offer a reference to new manufacturing pressure vessels before leaving the factory.