Dewar noise reduction auscultation device for high-voltage cable fault positioning

Abstract

The invention relates to a Dewar noise reduction auscultation device for high-voltage cable fault positioning, and the device comprises a pipe body which is provided with a cavity and a tuning fork assembly in the axial direction, and the tuning fork assembly is disposed in the cavity. The device further comprises a pickup assembly and a chassis assembly, the upper end of the pickup assembly penetrates through the lower end of the pipe body in the axial direction of the pipe body and then is connected with the tuning fork assembly; the lower end of the pickup assembly penetrates through the chassis assembly, and the pickup assembly can move in the axial direction of the chassis assembly. The invention provides the scheme, the effective pickup can be conveniently carried out on soft soil and hardened flat or uneven ground; frequency modulation is carried out through the tuning fork assembly; the optimal pickup resonance can be obtained; finally, due to the fact that the interior of thecavity of the pipe body is in a vacuum state, external sound is well prevented from being conducted into the pipe body, the denoising effect is achieved, the pickup recognition accuracy is improved, sound generated by the breakdown of a fault point due to the fact that a pulse cable is applied to a cable line is effectively picked up, and the fault point positioning is achieved.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a Dewar noise-reducing auscultation device for high-voltage cable fault location. Background technique [0002] At present, due to the long length of high-voltage cables with a voltage level of 110kV and above, when a fault occurs on the line, it is necessary to accurately locate the fault point to carry out emergency repair work. [0003] In the process of locating the fault point, when multiple pulses are used for pre-location failure, it is generally adopted to apply pulse voltage on the cable line to cause breakdown of the fault point, and use the electromagnetic sound wave method to perform sound auscultation and positioning along the line, but this The method is susceptible to the influence of sound waves from space, especially in the case of large surrounding noise during the day, which makes it difficult to locate the fault and prolongs the repair time. Contents...

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a Dewar noise-reducing auscultation device for high-voltage cable fault location in view of the problem that the existing fault point location is easily affected by the sound waves from space, resulting in difficult fault location

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