• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

电力建设 ›› 2015, Vol. 36 ›› Issue (6): 84-88.doi: 10.3969/j.issn.1000-7229.2015.06.014

• 输配电技术 • 上一篇    下一篇

特高压变电站主设备焊缝衍射时差法检测适应性分析

韩凝晖,包乐庆,王国俊   

  1. 中国电力科学研究院,北京市 100192
  • 出版日期:2015-06-01
  • 作者简介:韩凝晖(1987),男,硕士研究生,助理工程师,主要从事特高压主设备监造方面的工作 包乐庆(1961)男,硕士研究生,高级工程师,主要从事特高压主设备监造方面的工作 王国俊(1976),男,硕士研究生,高级工程师,主要研究方向为焊接,材料加工与无损检测

Adaptability Analysis of TOFD Weld Detection for UHV Substation Primary Equipment

HAN Ninghui, BAO Leqing, WANG Guojun   

  1. China Electric Power Research Institute, Beijing 100192, China
  • Online:2015-06-01

摘要:

针对特高压变电站主设备GIS、变压器和电抗器的使用材料、工艺结构和加工特点,提出利用衍射时差(time of flight diffraction,TOFD)超声检测法,对主设备进行焊缝缺陷检测。首先从设备的材料、母材的厚度等方面深入分析TOFD超声检测法的适应性及检测参数选择原则,并对不同厚度的铝板、钢板进行试验验证。结果表明,TOFD法检验厚度为6 mm左右和10 mm及以上的合金铝、碳钢等材料的焊缝时,采用高频率探头,能够清晰而准确地判断缺陷大小、性质、自身高度。

关键词: 特高压变电站主设备, 焊缝检测, 衍射时差法(TOFD)

Abstract:

According to the GIS, materials, craft structures and processing characteristics of UHV primary equipment, ultrasonic testing method based on time of flight diffraction (TOFD) was presented for the weld detection of primary equipment. Firstly, the adaptability and parameters selection principle of TOFD ultrasonic testing method were analysed from aspects of equipment material, base metal thickness, etc. Then, two briquettes with different thickness: aluminium alloy and carbon steel, were used for experimental verification. The results show that the welds of aluminium alloy and carbon steel with thickness of about 6 mm and 10 mm above can be detected by high frequency probe with using TOFD method, which can clearly and accurately determine the size, nature, height of defect.

Key words: UHV , substation primary equipment, weld detection, time of flight diffraction

中图分类号: