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Ultrasonic detection method for cracks in steel feet of suspension insulators

A technology of suspension insulator and detection method, which is applied to the analysis of solids using sonic/ultrasonic/infrasonic waves, can solve the problems of narrow application range, low detection accuracy, inconvenient use, etc., and achieve the effect of reducing the loss of batch scrapping

Active Publication Date: 2016-06-29
DALIAN SAIRUI METAL PROD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of this invention is to provide an ultrasonic detection method for cracks in the steel feet of suspension insulators, which solves the problems of inconvenient use, low detection accuracy and narrow application range of traditional detection methods.

Method used

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  • Ultrasonic detection method for cracks in steel feet of suspension insulators
  • Ultrasonic detection method for cracks in steel feet of suspension insulators
  • Ultrasonic detection method for cracks in steel feet of suspension insulators

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Embodiment 1

[0031] according to Figure 1~4 The detection method of the present invention is explained in detail. The 210kN insulator with a high tendency to crack defects is selected as the product to be inspected. The position of the artificial crack is as follows: figure 1 shown. The ultrasonic detection method for cracks in the steel feet of suspension insulators includes the following steps:

[0032] 1) Take 5 qualified suspension insulators with L=130mm and 6 qualified suspension insulators with L=140mm respectively as blank samples. Take 4 blank samples with L=140mm, the first and second ones are artificially cut cracks with depths of 1mm and 4mm respectively at the distance from the root of the ball head to the surface of the ball head at a distance of 16.5mm, and the third one is at the distance from the ball head to the top of the shaft. A crack with a depth of 2mm was manually cut at a distance of 38.0mm from the surface of the head, and the third crack was cut with a depth ...

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Abstract

The technical points of the ultrasonic testing method for cracks in the steel feet of suspension insulators include the following steps: 1) Take at least two qualified products with different length specifications as blank samples for backup; Or artificially cut cracks with a depth of 1 to 4mm on the upper part of the rod or the root of the pouring head, and use them as reference samples; 2) Use a flaw detector to detect and record the data of blank samples with different length specifications; 3) Use a flaw detector to detect and record different lengths Control sample data of specifications and crack positions; 4) Calculate the deviation value based on the data obtained in step 3); 5) Use a flaw detector to inspect the steel foot sample of the suspension insulator to be tested, and discharge the deviation value. It solves the problems of inconvenient use, low detection accuracy and narrow application range of traditional detection methods. It has the advantages of wide application range, convenient and fast use, and high precision.

Description

technical field [0001] The invention relates to an ultrasonic detection method, in particular to an ultrasonic detection method for cracks in a steel foot of a suspension insulator. Background technique [0002] Suspension glass insulators mainly include steel feet, iron caps and glass discs, which support and insulate the wires. Generally, the requirement for the strength of the insulator material is glass>iron cap>steel foot, that is, the strength of the steel foot is the lowest in the insulator assembly. However, since insulators are completed in series with multiple sets of insulators in practical applications, the requirements for the mechanical properties of the steel feet cannot be lowered. The steel feet must have a reasonable strength guarantee value and low dispersion, especially to eliminate potential defects. To avoid the dangers brought about by long-term use under harsh conditions and ensure the safety of transmission lines. Steel feet are processed fro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/04
Inventor 汪涛
Owner DALIAN SAIRUI METAL PROD
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