General supporting base of test assisting device for vibration acoustical detection of 750kV strut porcelain insulators and test method
A pillar porcelain insulator and vibro-acoustics technology is applied in the field of non-destructive testing of pillar-type porcelain insulators to overcome the difficulties of implementing vibro-acoustic testing experiments and ensure the stability.
Active Publication Date: 2014-11-26
STATE GRID CORP OF CHINA +2
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[0008]The object of the present invention is to solve the above problems and propose a 750kV pillar porcelain insulator vibro-acoustic detection test auxiliary device, which can not only simulate the actual installation form of porcelain insulators on site, but also use Test with as few insulators as possible, and grasp the influence of cracks at different parts of the flange on the test data through the test, so as to achieve the purpose of obtaining as much test data as possible with as few artificial defects as possible. Porcelain Insulator Inspection Method and Defect Judgment Method
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[0043] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0044] The present invention is aimed at the multi-support for 750kV ultra-high voltage electrical equipment, which is composed of four pillar porcelain insulators connected in series, during the implementation of Gansu Provincial Electric Power Company's scientific and technological project "750kV Substation Pillar Insulator Vibration Acoustic Live Detection Technology Research (Project No.: 2013103016)" Structure, designed vibro-acoustic detection test device and experimental method, the purpose is to carry out vibro-acoustic detection test for the structure of series-type pillar porcelain insulators, and find out the vibration echoes of defects in different parts o...
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Abstract
The invention discloses a test assisting device for vibrational acoustical detection of 750kV strut porcelain insulators and a test method. The test assisting device comprises a general supporting base capable of adjusting the supporting area of the bottom part and steel coupling discs for mutual coupling among insulators with different diameters, wherein an insulator fixing plate at the upper part of the general supporting base is provided with 8 long-round installing holes for fixing the insulators with different diameters; and 6 steel coupling discs can realize rigid connection of the insulators with different diameters when being combined according to different orders and different directions so as to guarantee transmission of vibrational acoustical detection signals among the insulators. The test assisting device is used for simulating the site installation condition to implement vibrational acoustical vibration-detecting experiment on a plurality of sections of strut porcelain insulators connected in series. Four porcelain insulator object test pieces are utilized for carrying out simulated detection test on artificial defects of different positions of the insulators connected in series and finding the rule of the influence on detection data caused by defected positions so as to achieve the purpose of obtaining most test data by utilizing the test pieces as few as possible.
Description
technical field [0001] The invention relates to the technical field of non-destructive testing of pillar type porcelain insulators, in particular to a universal support base and a test method for a 750kV pillar porcelain insulator vibroacoustic detection test auxiliary device. Background technique [0002] Porcelain pillar insulators are one of the important equipment for power grid substations and transmission lines. guarantee of reliable operation. Due to stress concentration, temperature changes, differences in expansion coefficients of different materials, and water ingress of glued cement, etc., the cracks generated by porcelain insulators during operation are usually located near the connection between the cast iron flange and the porcelain column. In order to timely and effectively detect possible cracks on the porcelain body of pillar porcelain insulators, macroscopic inspection and ultrasonic detection methods are usually used, but the above two methods must be det...
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Inventor 苗兴袁芳高健张昕席家福王斌赵明忠张忠元李军杨景建杨占君白涛孙小平李玉鹏董开松姜梅李辉石华洲晏得才武鑫尚峻锋
Owner STATE GRID CORP OF CHINA