Column support insulator and porcelain bushing ultrasonic wave electrified flaw detection special-purpose probe

Abstract

The invention provides a post insulator and a special probe used for ceramic sleeve ultrasonic electric flaw detection, belonging to the field of electric technique, comprising an insulation shell, an organic glass contact block, a filling material, a piezoelectric crystal, a conductive wire and a coil conductive wire. The conductive wire is led out of the enclosed end of the insulation shell and the other end of the insulation shell is provided with an opening, on which the organic glass contact block is arranged. The piezoelectric crystal and the filling material are sequentially arranged in the insulation shell and closely attached to the organic glass contact block; one side of the organic glass block is a concave surface and the other side thereof is an inclined surface; the piezoelectric crystal is arranged on the inclined surface of the organic glass block; the piezoelectric crystal is connected with the conductive wire by the coil conductive wire. The post insulator and the special probe of the invention can lead the electric detection mechanism to reliably and exactly detect the safety hidden trouble existing in the post insulator and ensure the safe running of the power network during the ultrasonic electric detection process.

Description

technical field [0001] The invention relates to a special probe in the field of electrical technology, in particular to a special probe for ultrasonic live flaw detection of pillar insulators and porcelain sleeves. Background technique [0002] With the rapid growth of electricity demand and the acceleration of power grid construction, the traditional periodic inspection of high-voltage power transmission and transformation equipment will not be able to meet the needs of safe and stable operation of the power grid. The huge economic loss caused by the power sector urgently needs the condition-based maintenance technology based on the online detection and maintenance of power transmission and transformation equipment. Post insulators and porcelain bushings are necessary components of transmission transformer lines, and ultrasonic testing is a relatively mature technology for flaw detection of post insulators and porcelain bushings. [0003] After searching the existing techn...

AI Technical Summary

Problems solved by technology

It can be seen from the text that this probe is used for power failure detection, and some structural features limit its application in live detection: 1. The socket at the closed end of the probe is used to provide energy for the piezoelectric chip, which affects its use in the live detection mechanism The usability in the medium will lead to large-scale structural size and complex structure, which will reduce the reliability of the live mechanism, and then affect the availability of live detection results; 2. The incident angle of the probe is not involved, which limits the detection range of the probe. range, and the breakage of substation post insulators mostly occurs at the cast iron flanges where the post insulators are under greater stress, and a considerable amount of breakage occurs inside the cast iron flanges. Difficulty; 3. The thickness of the contact block and the overall size of the probe cannot be reasonably designed, so that there is a risk of flashover along the surface during live detection, which affects the normal operation of the equipment and further affects the normal and safe production of the substation

Images