CN102621456B - Method and device for detecting planar defects of insulating tool on site - Google Patents
Method and device for detecting planar defects of insulating tool on site Download PDFInfo
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- CN102621456B CN102621456B CN201110457445.9A CN201110457445A CN102621456B CN 102621456 B CN102621456 B CN 102621456B CN 201110457445 A CN201110457445 A CN 201110457445A CN 102621456 B CN102621456 B CN 102621456B
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Abstract
The invention provides a method and a device which are used for detecting planar defects of an insulating tool on site. A 5KV high voltage is applied on a plane on the site by using a piece of detection equipment, and the defect situation of the insulating tool is judged by the comparison of a feedback current signal and a standard signal so as to guarantee operation safety. The method for detecting interlayered defects of the insulating too on the site comprises the following steps: 1, distributing a high voltage end and a low voltage end of detection electrodes along the plane of the insulating tool, applying 5KV high voltage on the two electrodes, and moving the electrodes to obtain a voltage feedback signal; and 2, inputting the acquired feedback voltage signal and the standard signal into a comparer, inputting an output signal of the comparer to an alarm module, and the alarm module indicates the situation of the planar defects. The device for detecting the planar defects of the insulating tool is convenient to carry and convenient to operate, and is high in detection safety and high in precision of detection results.
Description
Technical field
The present invention relates to insulating tool along planar defect detection method and device, belong to live line work insulating safety appliance and insulation covers apparatus along planar defect onthe technology of site test field, particularly relate to insulating tool along planar defect in-situ check and test method and adopt the insulating tool of the method along face pick-up unit.
Background technology
Use insulating tool in hot line job, safety protective tools kind is many, textural difference is large, its insulating property are directly connected to the safety of operating personnel and equipment, therefore the management and of insulating tool and safety protective tools must meet relevant regulations in " State Grid Corporation of China's electric power safety working regulation (circuit pack) ", before live line tool uses, should carefully check that confirmation does not damage, make moist, be out of shape, malfunctioning, otherwise to prohibit the use.And using 2500V and above insulation resistance meter or insulation tester to carry out segmentation detection (the wide 2cm of electrode, the wide 2cm of interpolar), resistance should be not less than 700M Ω.The regulation strictly observed in safety is regularly tested, the defect that Timeliness coverage exists and hidden danger.
Live-working safety safety appliance comprises insulating protection apparatus, insulation shading tool, shielding apparatus, and Long-Time Service easily makes surface abrasion, contamination, and humidity causes reducing along surface resistance, have impact on electrical insulation properties, threatens job safety.Whether first existing insulating tool detection method is the quality checking insulation, pierced through and come unglued by eye-observation, with or without phenomenons such as gas leakage or breaches.If there is not above defect through observing, under ensureing that insulating tool cleans dry prerequisite, by insulating tool immersion test with in insulation liquid bath, apply voltage by electrode pair insulating tool, according to the insulating tool of different brackets, ac voltage withstanding value is different with leakage current values selects institute's high voltage, high voltage some minutes, as without flashover, without puncturing, without obviously generating heat, then test is passed through, otherwise not by.More than testing and all need to carry out in dielectric, is all complete in testing laboratory, and is detect interlayer, cannot meet on-the-spot along face detection needs.
Insulating tool should carry out a preventive trial in general about 6 months, before carrying out preventive trial, because insulating tool Site Detection relation technological researching achievement is few, add the shortage of field detecting device, even if insulating tool is also not easy to be found along face existing defects, uses the insulating tool of these existing defects to carry out operation and injure staff's personal safety.Therefore, need to launch research to insulating tool along planar defect onthe technology of site test, develop field detecting device, to ensure carrying out smoothly of operation.Not yet launch research for insulating tool onthe technology of site test and equipment both at home and abroad, in equipment development process, not ready-made standards and norms can for using for reference, can only on the basis of domestic and international various insulating tool testing laboratories detection technique achievement in research (comprising principle, technical standard, use experience etc.) of investigation, according to insulating tool defect field detecting device should meet simple to operate, easy to use, detect the features such as efficient, design and development is carried out to its principle, function and technical conditions etc.
Bibliographical information such as application number about this respect is the utility model patent of the Portable synthesis type electroinsulating property test device by name of 200820068230.1, disclosing a kind of Portable synthesis type electroinsulating property test device, relating to a kind of test unit for detecting insulation tool insulation property.All-around test stand fills insulating bar test ground-electrode, mask platform upper bracket, magnet steel, magnet steel fills insulating bar test high-field electrode, electroscope proving ring electrode, mask test electrode bar is connected between mask platform upper bracket and mask platform undersetting, electroscope proving ring electrode connects electroscope test ball electrode, all-around test stand dress leakage current table.This utility model can for 10KV various sizes specification insulating bar on same test platform, and 0,1,2,3 different stage insulated targets, insulation clothing, the electroscope of mask and below 35KV carries out electrical performance test.But above-mentioned patent does not relate to a kind of insulating tool along planar defect in-situ check and test method and adopt the insulating tool of the method along face pick-up unit, and this respect does not still see relate art literature.
In sum, standards and norms are not also had can directly to instruct insulating tool along the development of planar defect field detecting device at present, need on the various defect detecting technique basis of Macro or mass analysis, carry out autonomous innovation, development is applicable to the equipment of insulating tool defect Site Detection.
In view of this, be necessary to provide a kind of insulating tool along planar defect in-situ check and test method and device, the method and device can realize carrying out Site Detection to insulating tool along planar defect, can ensure job safety and staff's personal safety.
Summary of the invention
Technical matters to be solved by this invention is: for solving the problem that insulating tool lacks along planar defect onthe technology of site test, the invention provides a kind of insulating tool along planar defect in-situ check and test method and pick-up unit, adopt the method and device can realize carrying out Site Detection to insulating tool along planar defect, job safety and staff's personal safety can be ensured.
The technical solution adopted in the present invention is: a kind of insulating tool, along planar defect on-site detecting device, is made up of power supply, high pressure generation module, detecting electrode, detection module, alarm module, it is characterized in that:
Power supply provides required operating voltage to whole circuit;
High pressure generation module is used for supply voltage boosting to export, and the high-voltage alternating of output is converted to 5kV DC voltage;
Detecting electrode is made up of connecting link, binding post, electrode three part, and connecting link is a long 60mm, and diameter is the isolation material right cylinder of 10mm, and connecting link symcenter deducts a circular hole for connecting handle; Binding post and electrode are all full copper materials, and binding post is a diameter is 5mm, and length is the right cylinder of 40mm, and one of two binding posts connects the two ends of connecting link respectively, and other end connects two electrodes respectively; The cube of two electrodes to be all the length of side be 20mm, electrode gap 20mm, two electrodes are coaxially arranged, are arranged in the along of insulating tool to be detected, and during detection, one of them electrode connects 5kV high direct voltage, another one connecting to neutral current potential; Detection module comprises High voltage output, sampling module, normal voltage generation module, comparison module, and detection module is measured insulating tool and compared with measuring resistance along surface resistance, and comparative result exports alarm module to;
Alarm module is used to indicate insulating tool defect, and sends sound and light alarm.
Insulating tool as above is along planar defect on-site detecting device, it is characterized in that: described high pressure generation module is made up of control signal generation module, isolation module, switch control module, boost module, wherein control signal generation module adopts multivibrator, be made up of as main control chip NE555, for generation of amplitude, frequency, pwm signal that dutycycle is adjustable; Isolation module is made up of photoelectrical coupler, for electrical isolation, prevents voltage from going here and there mutually, burns chip; Switch control module is made up of MOSFET power tube, carries out DC-AC conversion, DC power conversion is become alternating current by the control of pwm signal to DC voltage; Boost module carries out boosting and rectification to alternating current, generates the high voltage direct current of 5kV.
The present invention also provides a kind of insulating tool along planar defect in-situ check and test method, adopts insulating tool as above along planar defect on-site detecting device, it is characterized in that, comprise the steps:
1) high-pressure side of detecting electrode and low pressure end are arranged in the along of insulating tool, the two poles of the earth apply 5kV high pressure, and the position of traveling electrode, obtain voltage feedback signal;
2) by the feedback voltage signal of acquisition and standard signal input comparator, comparator output signal input alarm module, alarm module instruction is along planar defect situation.
The invention has the beneficial effects as follows: show through onsite application, this insulating tool is easy to carry along planar defect on-site detecting device, easy to operate; Detection degree of safety is high, and testing result precision is high.
Accompanying drawing explanation
Fig. 1 is the system chart of insulating tool along planar defect on-site detecting device of the embodiment of the present invention.
Fig. 2 is the system chart of the high pressure generation systems in Fig. 1.
Fig. 3 is the structural representation along face detecting electrode in Fig. 1.
Fig. 4 is the system chart of the detection module in Fig. 1.
Fig. 5 is the multivibrator circuit schematic diagram in high pressure generation systems.
Embodiment
In order to understand the present invention better, illustrate content of the present invention further below in conjunction with embodiment, but content of the present invention is not only confined to the following examples.Those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values are equally within claims limited range listed by the application.
Symbol description in Fig. 1: 1.1-power supply, 1.2-high pressure generation module, 1.3-detection module, 1.4-alarm module.
Symbol description in Fig. 2: 2.1-control signal generation module, 2.2-isolation module, 2.3-switch control module, 2.4-boost module.
Symbol description in Fig. 4: 3.1-High voltage output, 3.2-sampling module, 3.3-normal voltage generation module, 3.4-comparison module.
The principle of work of the inventive method is: if when causing along planar defect because of filthy or moist, resistance is less than 700M Ω, when insulating tool applying 5kV high pressure wide along face 2cm, dividing potential drop above it is less than measuring resistance 700M Ω dividing potential drop, the sample resistance voltage of series connection with it raises, and is greater than standard voltage signal, and comparer exports high level, drive warning circuit, warning circuit sends sound and light alarm.
The insulating tool intralayer defects on-site detecting device that the embodiment of the present invention provides is made up of power supply, high pressure generation module, detecting electrode, detection module, alarm module.
With reference to Fig. 1, be present system block scheme, wherein power supply provides operating voltage to whole circuit; High pressure generation module is for generation of the required 5kV high pressure of detection; Detection module, is applied to behind face for obtaining 5kV high voltage direct current, the feedback signal on divider resistance, and this signal input comparator and standard signal is compared; Alarm module, when insulating tool is along face existing defects, trigger alarm circuit, carries out alarm.
With reference to Fig. 2, for detecting high-pressure generating circuit system chart along planar defect, power supply provides working power for whole circuit; Control signal generation module comprises multivibrator circuit and peripheral circuit thereof, is to be made up of as main control chip NE555, for generation of amplitude, frequency, pwm signal that dutycycle is adjustable; Isolation module is made up of photoelectrical coupler, for electrical isolation, prevents voltage from going here and there mutually, burns chip; Switch control module is made up of MOSFET power tube, carries out DC-AC conversion, DC power conversion is become alternating current by the control of pwm signal to DC voltage; Boost module, its Main Function boosts to alternating current, and rectification, generate the high voltage direct current of 5kV.
Fig. 3 is along face detecting electrode, by connecting link, and binding post, three, electrode part composition.Connecting link is a long 60mm, and diameter is the isolation material right cylinder of 10mm, and connecting link symcenter deducts a circular hole for connecting handle, and handled easily uses.Conductor and electrode are all full copper materials, and conductor is a diameter is 5mm, and length is the right cylinder of 40mm, and one of two conductors connects the two ends of connecting link respectively, and other end connects two electrodes respectively.The cube of two electrodes to be all the length of side be 20mm, electrode gap 20mm, two electrodes are coaxially arranged, receive high-pressure side and the earth terminal of high pressure generator.
With reference to Fig. 4, for along planar defect detection module, wherein high-voltage power supply exports 5kV direct current, for sampling is prepared; Sampling module connects dividing potential drop for measuring sampling by measured resistance with sample resistance; Normal voltage generation module to be connected with measuring resistance the bleeder circuit formed by 700M Ω resistance; Comparison module be that output is compared to the voltage in module 2 and module 3; Alarm module compares Output rusults for judging, if resistance value is less than the resistance 700M Ω that safety specifies, drives along planar defect warning circuit, send sound and light alarm.
With reference to Fig. 5, it is the multivibrator circuit schematic diagram of the control signal generation module in high pressure generation module, be made up of NE555 integrated chip, this chip has required resistor, capacitor is simple, operating power scope is very big, can coordinate with the logical circuit such as TTL, CMOS, the supply electric current of output terminal is large, directly can promote the advantages such as the load of multiple automatic control.NE555 coordinates the pulse signal producing certain frequency, amplitude with peripheral circuit, keep apart through optical coupling isolator and high voltage part, and this pulse signal controls the shutoff of power switch pipe.
Insulating tool provided by the invention is along planar defect in-situ check and test method, 5kV high voltage direct current is applied to the insulating tool of wide 2cm along face by electrode, if along face existing defects, resistance reduces, feedback voltage is greater than normal voltage, comparer output voltage drives warning circuit, by acoustooptic instruction insulating tool defect, comprises the following steps:
1) high-pressure side of detecting electrode and low pressure end are arranged in the along of insulating tool, the two poles of the earth apply 5kV high pressure, and the position of traveling electrode, obtain voltage feedback signal;
2) by the feedback voltage signal of acquisition and standard signal input comparator, comparator output signal input warning circuit, warning circuit instruction is along planar defect situation.
The content be not described in detail in this instructions belongs to the known prior art of professional and technical personnel in the field.
Claims (3)
1. insulating tool is along a planar defect on-site detecting device, is made up of, it is characterized in that power supply, high pressure generation module, detecting electrode, detection module, alarm module:
Power supply provides required operating voltage to whole circuit;
High pressure generation module is used for supply voltage boosting to export, and the high-voltage alternating of output is converted to 5kV DC voltage;
Detecting electrode is made up of connecting link, binding post, electrode three part, and connecting link is a long 60mm, and diameter is the isolation material right cylinder of 10mm, and connecting link symcenter deducts a circular hole for connecting handle; Binding post and electrode are all full copper materials, and binding post is a diameter is 5mm, and length is the right cylinder of 40mm, and one of two binding posts connects the two ends of connecting link respectively, and other end connects two electrodes respectively; The cube of two electrodes to be all the length of side be 20mm, electrode gap 20mm, two electrodes are coaxially arranged, are arranged in the along of insulating tool to be detected, and during detection, one of them electrode connects 5kV high direct voltage, another one connecting to neutral current potential;
Detection module comprises High voltage output, sampling module, normal voltage generation module, comparison module, and detection module is measured insulating tool and compared with measuring resistance along surface resistance, and comparative result exports alarm module to;
Alarm module is used to indicate insulating tool defect, and sends sound and light alarm.
2. insulating tool according to claim 1 is along planar defect on-site detecting device, it is characterized in that: described high pressure generation module is made up of control signal generation module, isolation module, switch control module, boost module, wherein control signal generation module adopts multivibrator, be made up of as main control chip NE555, for generation of amplitude, frequency, pwm signal that dutycycle is adjustable; Isolation module is made up of photoelectrical coupler, for electrical isolation, prevents voltage from going here and there mutually, burns chip; Switch control module is made up of MOSFET power tube, carries out DC-AC conversion, DC power conversion is become alternating current by the control of pwm signal to DC voltage; Boost module carries out boosting and rectification to alternating current, generates the high voltage direct current of 5kV.
3. insulating tool is along a planar defect in-situ check and test method, adopts insulating tool as claimed in claim 1 along planar defect on-site detecting device, it is characterized in that, comprise the steps:
1) high-pressure side of detecting electrode and low pressure end are arranged in the along of insulating tool, the two poles of the earth apply 5kV high pressure, and the position of traveling electrode, obtain voltage feedback signal;
2) by the feedback voltage signal of acquisition and standard signal input comparator, comparator output signal input alarm module, alarm module instruction is along planar defect situation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110457445.9A CN102621456B (en) | 2011-12-31 | 2011-12-31 | Method and device for detecting planar defects of insulating tool on site |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110457445.9A CN102621456B (en) | 2011-12-31 | 2011-12-31 | Method and device for detecting planar defects of insulating tool on site |
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| CN102621456A CN102621456A (en) | 2012-08-01 |
| CN102621456B true CN102621456B (en) | 2015-02-04 |
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| CN107621596A (en) * | 2017-07-26 | 2018-01-23 | 贵州电网有限责任公司 | Live line work insulating takes surface insulation performance detecting system |
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| JP2011069634A (en) * | 2009-09-24 | 2011-04-07 | Ngk Insulators Ltd | High-voltage application faulty insulator detector |
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| CN2140528Y (en) * | 1992-09-23 | 1993-08-18 | 湘潭市金轮新型电器研究所 | Insulator and electrical connector on-line detector |
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