换热器管板角焊缝超声波自动检测装置的研制

Development of the heat exchanger tube-tubesheet welds automatic testing device

针对大型石化设备所用的高温、高压式换热器的管板角焊缝检测,提出了相控阵超声检测技术,研制了一种超声波自动检测装置。该装置可以控制相控阵探头实现360°周向旋转扫查管板角焊缝,纵向采用相控阵电子线扫查。通过检测试验,成功地检测出角焊缝内部未熔合缺陷,验证了该装置的实用性。

According to the tube- tubesheet welds of high temperature,high pressure heat exchanger which used in the large petrochemical equipment,this paper put forward the phased array ultrasonic testing technique. To control the phased array probe to complete the 360° circumferential rotate scanning,the ultrasonic automatic testing device is developed. The electronic line scanning performed the axial scanning. Through the test,successfully detected the porosity flaw and the incomplete fusion flaw,verified the practicability of the device.