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Basin-type insulator density uniformity testing method

A basin-type insulator, density uniformity technology, applied in measuring devices, specific gravity measurement, instruments, etc., can solve problems such as low efficiency, large test data limitations, affecting the surface finish of workpieces, etc., to improve product quality and easy to factory. Detect and improve the effect of safe operation level

Active Publication Date: 2014-03-26
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Young's modulus test method is a point-by-point test, the test data is limited and the efficiency is low
Moreover, the test needs to contact the surface of the workpiece, which affects the surface finish of the workpiece and easily induces discharge breakdown during operation.

Method used

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  • Basin-type insulator density uniformity testing method

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Experimental program
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Effect test

Embodiment 1

[0051] Embodiment 1: The present invention discloses a method for testing the density uniformity of basin-type insulators, which includes the following steps:

[0052] (1), such as image 3 As shown, the pot insulator 3 to be tested is placed on the rotating platform 4, using industrial ray tomography detection technology, using high voltage (225kV), micro-focus (0.4*0.4mm), X-ray machine, and the emission is high Energy X-rays control the density resolution accuracy of industrial ray tomography at 1‰ or higher. The rays emitted by the ray source 1 are transmitted through the collimator 2 perpendicular to the axis of the basin insulator, and 5 is the ray detector, thus obtaining The industrial ray tomography image of the pot insulator, that is, the circular tomographic image;

[0053] (2). Divide the annular tomographic image into sectors with the same angle according to the common center, such as Figure 4 As shown, each fan is divided into fan-shaped grid areas according t...

Embodiment 2

[0061] Embodiment 2: A method for testing the density uniformity of basin-type insulators, comprising the following steps:

[0062] (1) Make comparison samples; figure 2 As shown, the comparative sample is a cylindrical structure, and the density is 1.0±0.2g / cm 3 , 2.0±0.2g / cm 3 、3.0±0.2g / cm 3 The cross-section of each comparison test block is fan-shaped, the fan-shaped angle is 120°, the fan-shaped radius is 50mm, and the height of the test block is 100mm. The precise density is determined by the liquid drainage weighing method;

[0063] (2) Place the comparison sample on the rotating platform, adopt industrial ray tomography detection technology, use high voltage (225kV), micro focus (0.4*0.4mm), X-ray machine, and emit high-energy X-rays, The ray is transilluminated perpendicular to the axis of the cylinder to obtain the circular tomographic image of the comparison sample; the gray value of the three comparison test blocks is tested, and then according to the gray value...

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Abstract

The invention discloses a basin-type insulator density uniformity testing method which comprises the following steps: (1) a basin-type insulator to be detected is placed on a rotating platform, the industrial ray chromatography detection technology is adopted, and rays transilluminate the basin-type insulator in a manner perpendicular to the axial line of the basin-type insulator to obtain a basin-type insulator circular-ring shaped chromatography image; (2) the circular-ring shaped chromatography image is divided into sectors with the same angle according to the common circle center, and each sector is divided into fan-shaped net regions in the radial direction of the common circle center at equal intervals to obtain the average gray-value of the whole circular-ring shaped chromatography image and gray difference percentage between the gray value of each fan-shaped net region and the average value; (3) the points with the maximum density, the points with the minimum density, and the regions with the maximum density changing rate are worked out. Through the adoption of the method, the density uniformity of the basin-type insulator can be accurately and effectively evaluated, the overall evaluation is realized, the detection speed is high, and the safe operation level of the power grid is improved.

Description

technical field [0001] The invention relates to a GIS (metal-insulated metal-enclosed switch) in an ultra-high voltage and ultra-high voltage power grid, in particular to a test method for detecting the density uniformity of GIS pot insulators. Background technique [0002] The full name of GIS in Chinese is metal-insulated metal-enclosed switch, which is the core component of modern power grid. GIS components are composed of central conductors, operating parts, shells, and basin insulators, and the internal space is filled with sulfur hexafluoride gas insulating gas. Such as figure 1 As shown, the pot insulator has a pot structure, the upper center is inlaid with a cylindrical conductor, and the protruding part of the lower pot is the connection part between the insulating pot and the GIS cylinder. The thickness of pot insulators for 1000kV lines is generally between 60mm-90mm, and the pot height is between 300mm-400mm; the thickness of 500kV pot insulators is generally b...

Claims

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Application Information

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IPC IPC(8): G01N9/24
CPCG01N9/24
Inventor 王朝华杨旭蔡红生汪毅谢伟黄兴泉李世涛胡峰涛耿进锋张武能
Owner STATE GRID CORP OF CHINA