GIS/GIL insulator stress ultrasonic detection platform and detection method

Abstract

The invention discloses a GIS / GIL insulator stress ultrasonic detection platform and a detection method. The platform comprises an ultrasonic probe, wherein one end of an ultrasonic probe is connected with one end of an ultrasonic instrument through probe adaptability, the other end of the ultrasonic probe is connected with a to-be-detected position of a GIS / GIL insulator, the input end of an oscilloscope is connected with the other end of the ultrasonic instrument through a high-impedance transmission line, and the output end is connected with a PC comprising a filtering unit and a computing unit through a USB; an ultrasonic instrument which is used for generating ultrasonic waves so as to carry out stress ultrasonic detection on the to-be-detected position; an oscilloscope which is used for collecting ultrasonic detection waveforms and sending the ultrasonic detection waveforms to the PC; a filtering unit which is used for filtering the ultrasonic detection waveform; and a calculation unit which is used for calculating the ultrasonic velocity of the position to be detected based on the filtered ultrasonic detection waveform, and calculating the stress of the position to be detected according to the acoustic elasticity principle. Therefore, the technical problem that equipment is damaged due to the fact that an existing stress detection method adopts lossy detection methods such as a drilling method and a cutting method is solved.

Description

technical field [0001] This application relates to the technical field of power transmission and transformation insulation equipment, in particular to a GIS / GIL insulator stress ultrasonic testing platform and testing method. Background technique [0002] The three-pillar insulator is an important electrical component in GIS / GIL. It is mainly used to support the internal energized conductor, and at the same time insulate and isolate the high-voltage conductor part from the low-voltage shell part. The three-pillar insulator is made by mixing epoxy resin, curing agent (usually acid anhydride) and filler (aluminum oxide powder) into a mold with aluminum alloy inserts and curing at high temperature. If the quality control of the curing process is not good, the three-pillar The epoxy material of the insulator and the aluminum alloy will have defects such as shelling, interlayer, and loose bonding. Stress concentration is an important reason for the formation and development of GI...

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Problems solved by technology

[0004] This application provides a GIS / GIL insulator stress ultrasonic detection platform and detection method, which is used to improve the existing stress detection method using drilling method, cutting method and other destructive detection methods, resulting in technical problems that cause damage to equipment

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