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Method and device for non-destructive testing of curing degree of pot insulators for high voltage switchgear

A basin-type insulator and high-voltage switch technology, which is applied in the direction of using sound waves/ultrasonic waves/infrasonic waves to analyze the thermal development of solids, instruments, materials, etc., can solve the problem of inapplicable performance testing, and it is difficult to fully reflect the curing degree of large-scale basin-type insulators, etc. problem, to achieve the effect of improving the quality of the factory

Inactive Publication Date: 2019-08-13
PINGGAO GRP +1
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Problems solved by technology

The disadvantage of differential scanning calorimetry is that this method is a destructive detection method, which requires destructive sampling in the detection area of ​​the tested part, and is not suitable for performance testing of large quantities of finished parts before they leave the factory.
At the same time, limited by the number of samples, it is difficult to fully reflect the overall curing degree of large pot insulators

Method used

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  • Method and device for non-destructive testing of curing degree of pot insulators for high voltage switchgear
  • Method and device for non-destructive testing of curing degree of pot insulators for high voltage switchgear
  • Method and device for non-destructive testing of curing degree of pot insulators for high voltage switchgear

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Embodiment Construction

[0042] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0043] Example of non-destructive testing method for curing degree of pot insulators for high voltage switchgear:

[0044] First, obtain the relational library of the corresponding relationship between the degree of solidification of the insulator and the power spectrum of the ultrasonic reflection signal on the bottom surface of the insulator, which mainly includes the following steps:

[0045] (1) Obtain test samples of pot insulators with uneven curing degree.

[0046] In order to obtain different curing degree distributions on the same pot insulator test sample, the 1100kV pot insulator is poured vertically, and the front view of the pot insulator test sample obtained is as follows figure 1 shown. exist figure 1 Among the positions 1-4 of the middle pot insulator test sample, position 1 is the first curing area, the subsequent curing areas are position...

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Abstract

The invention relates to a nondestructive testing method and device for basin type insulator curing degree of high-voltage switch equipment, wherein the nondestructive testing method comprises the following steps: transmitting an ultrasonic pulse to an insulator to be tested; obtaining an ultrasonic reflection signal at the lower bottom surface of the insulator to be tested; carrying out fast Fourier transform on the ultrasonic reflection signal, and calculating a power spectrum of the ultrasonic reflection signal; comparing the peak value of the power spectrum with a relational data base, thus obtaining the curing degree of the insulator to be tested; the relational data base is a corresponding relation of insulator curing degrees obtained by carrying out ultrasonic tests on insulator samples with different curing degrees and the power spectrum of the ultrasonic reflection signal at the lower bottom surface of the insulator. The method disclosed by the invention can effectively realize nondestructive testing on the overall curing degree of the basin type insulator.

Description

technical field [0001] The invention relates to a method and device for non-destructive testing of the solidification degree of basin-type insulators for high-voltage switchgear, and belongs to the technical field of non-destructive testing and evaluation of insulating materials. Background technique [0002] Basin insulator is one of the key components of high-voltage switchgear, which plays an important role in insulating, supporting and dividing the gas chamber, and its performance will directly determine the insulation performance and operational reliability of the switchgear. With the development of the grid voltage level towards UHV, the size of pot insulators for high-voltage switchgear continues to increase, and the requirements for its withstand voltage capability during operation are getting higher and higher. The production process of large pot insulators is complex, the production cycle is long, and the requirements for electrical and mechanical properties are hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/04G01N25/20
CPCG01N25/20G01N29/04G01N2291/023
Inventor 李继承田浩林生军袁端鹏罗军
Owner PINGGAO GRP
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