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Research on defect detection method of basin insulator based on low frequency dual probe ultrasonic
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Hebin SUN1, Zhiyi ZHOU2, Yanting LÜ2, Jinhua WU2, Yanke ZHOU2
Insulating Materials | 2023, 56(1) : 110 - 114
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Insulating Materials | 2023, 56(1): 110-114
• Test and Analysis •
Research on defect detection method of basin insulator based on low frequency dual probe ultrasonic
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Hebin SUN1, Zhiyi ZHOU2, Yanting LÜ2, Jinhua WU2, Yanke ZHOU2
Affiliations
  • 1Gansu Electric Power Research Institute Technology Center Co., Ltd., Lanzhou 730070, China
  • 2Gansu Electric Power Research Institute, Lanzhou 730070, China
Published: 2023-01-20 doi: 10.16790/j.cnki.1009-9239.im.2023.01.017
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Basin insulator is an important part of gas insulated closed combination switchgear (GIS) device, and its quality has an important impact on the construction and operation of power grid. In this paper, the failure causes of basin insulators were described, and the existing detection methods were compared in common cracking locations. According to the material characteristics of basin-type insulators and field test conditions, the probe frequency, K value, and chip size were calculated theoretically. An ultrasonic water immersion focusing oblique probe device was developed, a method of detecting cracks near the bolt holes of basin insulator by using the low-frequency dual-probe ultrasonic detection technology was proposed, and the test results were verified by laboratory penetration and ray detection. The results show that the ultrasonic refraction transverse wave with high signal-noise ratio can be generated in the basin insulator by using dual probes with 2 MHz 18×18 mm of model size and 24.8°-35.4° of angle (αL) between the axis of the wafer emission acoustic beam and the normal line of workpiece interface. It is feasible to use special low frequency double probe ultrasonic detection technology to detect the defects of GIS basin insulators.

basin insulator  /  focus probe  /  ultrasound  /  defect detection
Hebin SUN, Zhiyi ZHOU, Yanting LÜ, Jinhua WU, Yanke ZHOU. Research on defect detection method of basin insulator based on low frequency dual probe ultrasonic[J]. Insulating Materials, 2023 , 56 (1) : 110 -114 . DOI: 10.16790/j.cnki.1009-9239.im.2023.01.017
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2023.01.017
  • Receive Date：2022-01-06
  • Online Date：2025-11-21
  • Published：2023-01-20
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  • Received：2022-01-06
  • Revised：2022-03-16
Affiliations
    1Gansu Electric Power Research Institute Technology Center Co., Ltd., Lanzhou 730070, China
    2Gansu Electric Power Research Institute, Lanzhou 730070, China
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Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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