CN104458917A - Method for judging micro-defects of basin-type insulator - Google Patents
Method for judging micro-defects of basin-type insulator Download PDFInfo
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- CN104458917A CN104458917A CN201410735099.XA CN201410735099A CN104458917A CN 104458917 A CN104458917 A CN 104458917A CN 201410735099 A CN201410735099 A CN 201410735099A CN 104458917 A CN104458917 A CN 104458917A
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- disc insulator
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Abstract
The invention provides a method for judging micro-defects of a basin-type insulator. The method is used for judging the micro-defects of basin-type insulators for gas insulated switchgears, so as to screen unqualified products and optimize the product design. The method for judging micro-defects of basin-type insulator is characterized by comprising the following steps: when carrying out a water pressure destruction test or a tolerance test of the basin-type insulator, observing and analyzing acoustic emission signals in the test process, if the basin-type insulator generates a large amount of obvious acoustic emission events within a time period of being applied with a load smaller than 70% failure load, the basin-type insulator has micro-defects, and on the contrary, the basin-type insulator has no micro-defect.
Description
[technical field]
The invention belongs to insulator Product checking field, the microdefect particularly for gas insulation electric appliance disc insulator detects.Disc insulator microdefect determination methods provided by the present invention, is applicable to the disc insulator of voltage higher than the high pressure field of 1000V.
[background technology]
Gas insulation electric appliance equipment, since 20th century, the sixties was practical, has extensively run on all over the world.As critical component, the operational reliability of disc insulator is very important.The performance index of disc insulator have electricity function index, mechanical performance index etc., and wherein hydraulic testing index is an important indicator of mechanical property.Also the consistance of the Structure and energy of disc insulator can be reflected while hydraulic testing index characterization disc insulator physical strength.
Current disc insulator hydraulic pressure failure test method can only observe the final hydraulic pressure destruction value of insulator, and hydraulic pressure resistance test also can only judge disc insulator whether existing defects according to obvious crackle or leakage.Because test findings has certain dispersiveness and process of the test can not directly be observed, therefore can not ensure that all disc insulator inside by hydraulic pressure resistance test does not have microdefect, the disc insulator for hydraulic pressure failure test results abnormity does not explain the strong foundation of its abnormal destruction value yet.On the whole, present test method lacks the effective judgement for disc insulator microdefect.
In view of above technical matters, be necessary to provide a kind of disc insulator microdefect determination methods in fact.
[summary of the invention]
The object of this invention is to provide a kind of disc insulator microdefect determination methods, whether there is microdefect to detect disc insulator.
To achieve these goals, the present invention adopts following technical scheme:
A kind of disc insulator microdefect determination methods, be applicable to the disc insulator of voltage higher than the high pressure field of 1000V, disc insulator is connected on hydraulic pressure test fixture, then on disc insulator surface, calibrate AE sensor is installed, carry out in the process of the hydraulic testing, catch acoustic emission signal; If disc insulator is applied in load occur above-mentioned acoustic emission signal within the time period being less than 70% failing load, then illustrates that disc insulator exists microdefect, otherwise there is not microdefect.
Above-mentioned acoustic emission signal refers to: amplitude is greater than 50dB, the duration is greater than 350us, Ring-down count is greater than 20, the signal that energy is greater than 800mVus occurs.
Before carrying out the hydraulic testing, first in the unloaded state, testing environment noise on the impact of calibrate AE sensor, to debug sensor, filtering environmental noise.
When testing environment noise is on the affecting of calibrate AE sensor, the parameter of setting is: waveform thresholding 45dB, Parameters threshold 45dB, preamplification gain 40dB.
The contact site of described calibrate AE sensor and disc insulator is coated with couplant.
The resonance frequency of described calibrate AE sensor is 150kHz, and survey frequency scope is 22kHz ~ 220kHz.
After disc insulator and hydraulic pressure test fixture being connected, first check test frock is with or without leaking, and guarantees hydraulic testing normal operation.
Described disc insulator acoustic emission signal frequency is 100kHz-200kHz.
Compared with prior art, the present invention installs calibrate AE sensor on disc insulator surface, carries out in the process of the hydraulic testing, catches acoustic emission signal; If disc insulator is applied in load occur above-mentioned acoustic emission signal within the time period being less than 70% failing load, then illustrates that disc insulator exists microdefect, otherwise there is not microdefect.The present invention sensitively can judge whether disc insulator exists microdefect, improve the quality of the disc insulator hydraulic testing, help screening substandard product, help the reason determining hydraulic pressure failure test value exception, ensure that the reliability of the product by the hydraulic testing.
[embodiment]
The invention provides a kind of disc insulator microdefect determination methods, concrete step comprises following content:
1, assemble disc insulator and hydraulic pressure test fixture, hydraulic testing equipment is connected with frock pipeline, open hydraulic pressure testing equipment and check that frock is connected with without leaking, guarantee hydraulic equipment normal operation;
2, at disc insulator surface uniform distribution 1 to 6 calibrate AE sensor, at calibrate AE sensor and disc insulator contact position daubing coupling agent, calibrate AE sensor is steadily fixed on disc insulator surface in order to the acoustic emission signal in detection experiment process;
3, record the impact of environmental noise on acoustic emission instrument in the unloaded state, the parameters such as waveform thresholding 45dB, Parameters threshold 45dB, preamplification gain 40dB are set, adjusting instrument, filtering environmental noise;
4, start acoustic emission detection system, start disc insulator hydraulic testing equipment, while carrying out disc insulator hydraulic pressure failure test or resistance test, the acoustic emission signal in record process of the test;
5, the main critical parameter of acoustic emission signal is used: the amplitude of acoustic emission signal is greater than 50dB, the duration is greater than 350us, be greater than 20 with reference to Ring-down count, energy occurs is greater than 800mVus to determine this signal whether from the microdefect of disc insulator;
If 6 applied loads occurred obvious a large amount of acoustie emission event within the time periods being less than 70% failing load, then illustrate detect disc insulator and there is microdefect; Otherwise, then illustrate that the disc insulator detected does not exist microdefect.
Described failing load refers to, the load be applied in when disc insulator is damaged.
Described disc insulator acoustic emission signal frequency is 100kHz-200kHz, and selective resonance frequency of the present invention is 150kHz, and survey frequency scope is the calibrate AE sensor of 22kHz-220kHz.
The present invention installs calibrate AE sensor on disc insulator surface, carries out in the process of the hydraulic testing, catches acoustic emission signal; If disc insulator is applied in load occur above-mentioned acoustic emission signal within the time period being less than 70% failing load, then illustrates that disc insulator exists microdefect, otherwise there is not microdefect.The present invention sensitively can judge whether disc insulator exists microdefect, improve the quality of the disc insulator hydraulic testing, help screening substandard product, help the reason determining hydraulic pressure failure test value exception, ensure that the reliability of the product by the hydraulic testing.
Claims (8)
1. a disc insulator microdefect determination methods, be applicable to the disc insulator of voltage higher than the high pressure field of 1000V, it is characterized in that, disc insulator is connected on hydraulic pressure test fixture, then on disc insulator surface, calibrate AE sensor is installed, carry out in the process of the hydraulic testing, catch acoustic emission signal; If disc insulator is applied in load occur above-mentioned acoustic emission signal within the time period being less than 70% failing load, then illustrates that disc insulator exists microdefect, otherwise there is not microdefect.
2. a kind of disc insulator microdefect determination methods as claimed in claim 1, it is characterized in that, above-mentioned acoustic emission signal refers to: amplitude is greater than 50dB, the duration is greater than 350us, Ring-down count is greater than 20, the signal that energy is greater than 800mVus occurs.
3. a kind of disc insulator microdefect determination methods as claimed in claim 1, is characterized in that, before carrying out the hydraulic testing, first in the unloaded state, testing environment noise on the impact of calibrate AE sensor, to debug sensor, filtering environmental noise.
4. a kind of disc insulator microdefect determination methods as claimed in claim 3, is characterized in that, when testing environment noise is on the affecting of calibrate AE sensor, the parameter of setting is: waveform thresholding 45dB, Parameters threshold 45dB, preamplification gain 40dB.
5., as a kind of disc insulator microdefect determination methods in Claims 1-4 as described in any one, it is characterized in that, the contact site of described calibrate AE sensor and disc insulator is coated with couplant.
6. as a kind of disc insulator microdefect determination methods in Claims 1-4 as described in any one, it is characterized in that, the resonance frequency of described calibrate AE sensor is 150kHz, and survey frequency scope is 22kHz ~ 220kHz.
7., as a kind of disc insulator microdefect determination methods in Claims 1-4 as described in any one, it is characterized in that, after disc insulator and hydraulic pressure test fixture being connected, first check test frock is with or without leaking, and guarantees hydraulic testing normal operation.
8. a kind of disc insulator microdefect determination methods as claimed in claim 1, is characterized in that, described disc insulator acoustic emission signal frequency is 100kHz-200kHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410735099.XA CN104458917A (en) | 2014-12-04 | 2014-12-04 | Method for judging micro-defects of basin-type insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410735099.XA CN104458917A (en) | 2014-12-04 | 2014-12-04 | Method for judging micro-defects of basin-type insulator |
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| CN104458917A true CN104458917A (en) | 2015-03-25 |
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| CN201410735099.XA Pending CN104458917A (en) | 2014-12-04 | 2014-12-04 | Method for judging micro-defects of basin-type insulator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105574266A (en) * | 2015-12-16 | 2016-05-11 | 西安交通大学 | Multi-population genetic algorithm based comprehensive optimization design method for electrical and mechanical performance of basin-type insulator |
| CN105891330A (en) * | 2016-01-14 | 2016-08-24 | 东莞帕姆蒂昊宇液态金属有限公司 | Method and device for judging whether products are crystallized and detection equipment |
Citations (5)
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| JPH06347451A (en) * | 1993-06-07 | 1994-12-22 | Tokyo Electric Power Co Inc:The | Deterioration monitoring method for aerial distribution line |
| JPH11132926A (en) * | 1997-10-30 | 1999-05-21 | Ngk Insulators Ltd | Non-destruction inspecting method for polymer insulator |
| US6235992B1 (en) * | 1998-07-10 | 2001-05-22 | Abb Research Ltd. | Electric device with silicone insulating filler |
| CN103323311A (en) * | 2013-06-28 | 2013-09-25 | 云南电力试验研究院（集团）有限公司电力研究院 | Production method of artificial crack defects of porcelain post insulator |
| CN203275202U (en) * | 2013-04-16 | 2013-11-06 | 山东泰开电器绝缘有限公司 | Tool for detecting water pressure of blind-hole basin-type insulator |
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2014
- 2014-12-04 CN CN201410735099.XA patent/CN104458917A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06347451A (en) * | 1993-06-07 | 1994-12-22 | Tokyo Electric Power Co Inc:The | Deterioration monitoring method for aerial distribution line |
| JPH11132926A (en) * | 1997-10-30 | 1999-05-21 | Ngk Insulators Ltd | Non-destruction inspecting method for polymer insulator |
| US6235992B1 (en) * | 1998-07-10 | 2001-05-22 | Abb Research Ltd. | Electric device with silicone insulating filler |
| CN203275202U (en) * | 2013-04-16 | 2013-11-06 | 山东泰开电器绝缘有限公司 | Tool for detecting water pressure of blind-hole basin-type insulator |
| CN103323311A (en) * | 2013-06-28 | 2013-09-25 | 云南电力试验研究院（集团）有限公司电力研究院 | Production method of artificial crack defects of porcelain post insulator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105574266A (en) * | 2015-12-16 | 2016-05-11 | 西安交通大学 | Multi-population genetic algorithm based comprehensive optimization design method for electrical and mechanical performance of basin-type insulator |
| CN105574266B (en) * | 2015-12-16 | 2018-08-14 | 西安交通大学 | A kind of disc insulator based on Multiple-population Genetic Algorithm electrically and mechanically performance synthesis optimum design method |
| CN105891330A (en) * | 2016-01-14 | 2016-08-24 | 东莞帕姆蒂昊宇液态金属有限公司 | Method and device for judging whether products are crystallized and detection equipment |
| WO2017121338A1 (en) * | 2016-01-14 | 2017-07-20 | 东莞帕姆蒂昊宇液态金属有限公司 | Method and apparatus for determining whether product is crystallized, and detection device |
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Application publication date: 20150325 |
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