Ultrasonic detection device for live working insulating rod

Abstract

The invention relates to an ultrasonic detection device for live working insulation rods, relating to an ultrasonic detection device. At present, for the water immersion ultrasonic testing of insulating rods, the required water immersion device is large, which is only suitable for laboratory testing and is not suitable for making portable devices. The invention includes a detection head and a detector connected with the detection head. The detection head includes a wedge, a transmitting probe and a receiving probe arranged on the wedge; the wedge between the transmitting probe and the receiving probe is provided with a sound insulation layer; the bottom surface of the wedge is provided with a concave arc matching the insulating rod, and the top surface of the wedge is provided with a transmitting probe and a receiving probe; the transmitting probe and the receiving probe face the concave arc, and the transmitting There is an included angle between the probe and the receiving probe; the transmitting probe and the receiving probe are connected to the ultrasonic detector through the probe line. The technical solution is simple in structure, light in weight, easy to carry, easy to operate, and can conveniently and effectively realize the internal trauma detection of the insulating rod.

Description

technical field [0001] The invention relates to an ultrasonic detection device, in particular to an ultrasonic detection device for live working insulating rods. Background technique [0002] Insulating pipes for live working are generally made of glass fiber reinforced epoxy resin composites, which have good mechanical and insulating properties. Due to the combined effect of high voltage and mechanical stress on insulated tools during long-term use, microscopic defects such as delamination, air gaps, and impurities are easily formed inside, resulting in a decline in their mechanical and insulating properties, and ultimately endangering the safety of operators and maintenance equipment. At present, the commonly used preventive tests can judge the overall performance of insulating pipes by carrying out tests such as withstand voltage detection, leakage current detection, and dynamic load detection, but quantitative analysis cannot be given for the internal defects of the mate...

AI Technical Summary

Problems solved by technology

Due to the combined effect of high voltage and mechanical stress on insulated tools during long-term use, microscopic defects such as delamination, air gaps, and impurities are easily formed inside, resulting in a decline in their mechanical and insulating properties, and ultimately endangering the safety of operators and maintenance equipment

At present, the commonly used preventive tests can judge the overall performance of insulating pipes by carrying out tests such as withstand voltage detection, leakage current detection, and dynamic load detection, but quantitative analysis cannot be given for the internal defects of the material. At the same time, periodic tests can only ensure the current state of the tool and does not guarantee performance when used

As a non-destructive testing method, ultrasonic testing technology has obvious advantages such as convenient operation, simple equipment, and no damage. However, the diameter of the insulating rod is small, with a typical diameter of 20 mm, and the curvature is large. The attenuation is large and the propagation is complicated. Although the water immersion method can realize ultrasonic coupling, for the ultrasonic detection of insulating rods by the water immersion method, the required water immersion device is large, which is only suitable for laboratory testing and is not suitable for making portable devices. Ultrasonic testing of insulating rods on site

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