聚乙烯管焊接接头相控阵超声检测的优化设计

Optimized Design of Phased Array Ultrasonic Testing for Polyethylene Pipe Welding Joints

在管道工程应用中,由于良好的耐腐蚀性和韧性,聚乙烯(PE)管与其他材料相比具有显着优势,已广泛地应用在核电、油气输送领域;PE管焊接过程中,焊接参数、人员操作和环境等因素会影响聚乙烯管道的焊接情况,可能致使焊接接头内部形成缺陷,影响管道安全运行,而相控阵超声检测技术能够实现聚乙烯管道焊接接头内部结构的无损检测及评估;因此开展PE管焊接接头的相控阵超声实际检测工作,研究了聚乙烯材料的声衰减规律及声频散效应,优化了焊接接头的超声相控阵检测工艺,基于CIVA仿真软件实现了聚乙烯管道相控阵超声检测的声场模拟和缺陷仿真,通过研究检测参数及声学参量变化对检测结果的影响,获得了PE管焊接接头的最优检测工艺;通过加工带有典型缺陷的聚乙烯热熔对接接头试样,对前期基于仿真结果设计的检测工艺以及针对焊接接头相控阵检测研发的楔形耦合组件进行可靠性测试和工艺试验;研究结果为PE管接头缺陷的超声相控阵检测提供了工艺设计的理论支持和可靠的研究方法。

In pipeline engineering applications,polyethylene(PE)pipes have significant advantages over other materials due to their excellent corrosion resistance and toughness.They are widely used in the fields of nuclear power and oil and gas transportation.During the welding process of PE pipes,the factors of welding parameters,personnel operation,and environmental change can affect the welding quality of polyethylene pipelines,leading to internal defects in welded joints and influencing pipeline safe.Phased array ultrasonic testing technology can achieve the non-destructive testing and evaluation of internal structure in polyethylene pipe weld joints.Through the practical phased array ultrasonic testing of PE pipe weld joints,this paper studies the sound attenuation characteristics and acoustic dispersion effects of polyethylene materials,and optimizes the ultrasonic phased array testing process for weld joints.The CIVA simulation software is used to implement the sound field and defect simulation of phased array ultrasonic testing in polyethylene pipelines.the effects of the detection and acoustic parameters on the test results are studied to obtain the optimal testing process for PE pipe weld joints.By processing the PE butt fusion joint specimens with typical defects,the reliability testing and process experiments are conducted on the detection process based on the simulation results and wedge coupling components for phased array testing welding joints.The research result of this paper provides a theoretical support and reliable research method for phased array ultrasonic testing in PE pipe joints with defects.