CN110865282A - Detection method of insulating tool for live-wire work - Google Patents
Detection method of insulating tool for live-wire work Download PDFInfo
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- CN110865282A CN110865282A CN201911083689.8A CN201911083689A CN110865282A CN 110865282 A CN110865282 A CN 110865282A CN 201911083689 A CN201911083689 A CN 201911083689A CN 110865282 A CN110865282 A CN 110865282A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/18—Subjecting similar articles in turn to test, e.g. go/no-go tests in mass production
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Abstract
The invention discloses a detection method of an insulating tool for live working, and aims to provide a detection method with high detection efficiency. The detection method adopts a detection device which comprises a support, three insulating rollers which are rotatably arranged on the support at intervals, a plurality of anode strips which are annularly and uniformly distributed on the surface of the insulating roller along the axis of the insulating roller, a plurality of cathode strips which are annularly and uniformly distributed on the surface of the insulating roller along the axis of the insulating roller, an anode conducting ring arranged at one end of the insulating roller, a cathode conducting ring arranged at one end of the insulating roller, an anode contact which is fixedly arranged on the support and is in contact with the anode conducting ring, a cathode contact which is fixedly arranged on the support and is in contact with the cathode conducting ring, an anode test joint which is fixedly arranged on the support and a cathode test joint; the detection method comprises the following steps: and connecting the anode test connector and the cathode test connector with a test instrument, and then completing the insulation test of the sample to be tested from the surface of the rotating insulation roller.
Description
Technical Field
The invention relates to the technical field of insulation detection, in particular to a detection method of an insulation tool for live working.
Background
According to the requirements of operation specification files such as hot-line work technical guide rules, electric power safety work rules and the like and the actual safety requirements of hot-line work, the insulating tool for hot-line work needs to be checked before being used and can be used after being tested to be qualified. The insulating tools for live-wire work are of various types, different in material and shape, and mainly include soft insulating tools and hard insulating tools according to the material quality. The soft insulator comprises an insulating blanket, an insulating garment, an insulating pad, an insulating glove and the like, and the hard insulator comprises an operating rod, an insulating plate, an insulating ladder and the like; before the insulation test device is used on site, the safety of live working needs to be ensured, the insulation tools need to be checked, cleaned and subjected to insulation detection, but because the insulation tools needed on site are different in shape and different in material, no technology and method capable of fully meeting the insulation detection requirements of various insulation tools exist at present, and the insulation test detection of insulation tools and materials for live working is mostly completed by matching 2cm electrodes or induction portable insulation detectors with visual appearance inspection or other special customized test equipment and matched technical equipment. The current main detection modes are as follows:
1. the insulating blanket used in live working mostly adopts a plate electrode to carry out an interlayer insulation test, and needs to be carried out in a professional test place, but before the insulating blanket is used on site, the test can only depend on the 2cm electrode to carry out distance detection, the test is carried out by the electrode width of 2cm, the electrode distance of 2cm and the pressurization of 2500V, and the qualified resistance value must be larger than 700M omega, when the working method is carried out, the test electrode refers to the contact which is crossed on the surface of a test sample for a short time, only can detect the discharge resistance value of 2cm along the surface of a tool, and can not detect the breakdown voltage resistance value between layers, the influence of the proficiency of an operator and the sensitivity of a pressurization device is great, the detection result is unstable, the effective resistance test of the vertical and horizontal distances of the sample to be detected can;
2. the insulation rope test is mostly carried out by adopting a rated length and a rated test voltage, and needs to be carried out in a professional test place; in field tests, most of the field tests adopt an induction type portable detector for detection, and have the defects of slow detection, inaccurate effect and unstable contact state;
3. the insulation detection test of an insulation operating rod (insulating operating rod) is conventionally carried out in a test site in a professional field, but before the insulation operating rod is used in the field, an induction type insulation detector or a 2cm electrode is generally used for detection, the detection needs 3-4 persons to be matched, the electrode contact is unstable, and the detection effect is unreliable.
The analysis proves that the existing detection method has the defects of single test electrode shape, incomplete test, inflexible test site fixation, incapability of effectively carrying out tests on special-shaped or flexible insulating tools and the like.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a detection method of an insulating tool for live working, which can improve the detection efficiency and has strong test practicability.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a detection method of an insulating tool for live working adopts a detection device which comprises a bracket, three insulating rollers which are rotatably arranged on the bracket at intervals, a plurality of anode strips which are annularly and uniformly distributed on the surface of the insulating rollers along the axis of the insulating rollers, a plurality of cathode strips which are annularly and uniformly distributed on the surface of the insulating rollers along the axis of the insulating rollers, an anode conducting ring which is arranged at one end of the insulating rollers, connected with each anode strip and coaxial with the insulating rollers, a cathode conducting ring which is arranged at one end of the insulating rollers, connected with each cathode strip and coaxial with the insulating rollers, an anode contact which is fixedly arranged on the bracket and is in contact with the anode conducting ring, a cathode contact which is fixedly arranged on the bracket and is in contact with the cathode conducting ring, and an anode test joint which is fixedly arranged on the bracket and is connected, the cathode test joint is fixedly arranged on the bracket and is connected with the cathode contact through a lead; the anode strips and the cathode strips are arranged in a staggered manner; wherein, one end of at least one insulating roller is provided with an annular groove, and the anode sheet and the cathode sheet extend to the outer surface of the groove;
the detection method comprises the following steps:
and connecting the anode test connector and the cathode test connector with a test instrument, and then completing the insulation test of the sample to be tested from the surface of the rotating insulation roller.
Preferably, the sample to be detected is a soft block test sample, and the specific detection steps are as follows:
firstly, preparing equipment and protecting;
secondly, connecting the testing instrument with the anode testing connector and the cathode testing connector, detecting that the insulation state of the electrode is good when the machine is started up, and shutting down the machine;
thirdly, one end of the soft block-shaped test sample penetrates through the upper roller, is drawn out from the space between the upper roller and the middle roller, penetrates through the space between the middle roller and the lower roller, and is finally drawn out from the bottom of the lower roller; the soft block-shaped test sample is placed on the electrode in a curve and multi-fold manner, so that the simultaneous implementation of surface discharge insulation and interlayer insulation is ensured;
fourthly, starting a test instrument, adjusting to the parameters to be tested, and starting the test;
fifthly, the tester twitches the soft block-shaped test sample at a constant speed until the test sample is separated from the insulating roller;
and sixthly, observing or displaying the reading of the used instrument while drawing the soft block-shaped test sample at a constant speed, and recording, wherein the reading is larger than 700M omega in the whole process, namely the test sample is qualified, and the test sample smaller than 700M omega is scrapped in time.
Preferably, the soft block-shaped test sample is replaced by a hard block-shaped test sample, wherein the hard block-shaped test sample passes through the space between the two insulated rollers in the starting state during the interlayer insulation test; in the creeping discharge insulation test, a hard block-shaped test sample is slipped over the surface of an insulation roller in a starting state.
Preferably, the sample to be detected is a soft and long test sample, and the specific detection steps are as follows:
firstly, preparing equipment and protecting;
secondly, connecting the testing instrument with the anode testing connector and the cathode testing connector, detecting that the insulation state of the electrode is good when the machine is started up, and shutting down the machine;
thirdly, the soft long test sample penetrates through the annular groove of the upper roller electrode, so that the soft long test sample cable is wound in the upper roller for 2-4 circles, and the longitudinal and transverse breakdown insulation tests are ensured to be carried out at the same part;
fourthly, starting a test instrument, adjusting to the parameters to be tested, and starting the test;
fifthly, the tester twitches the soft long test sample at a constant speed;
and sixthly, observing or displaying the reading of the used instrument while drawing the soft long test sample at a constant speed, recording, wherein the reading is larger than 700M omega in the whole process, namely the test sample is qualified, and the test sample smaller than 700M omega is scrapped in time.
Preferably, the soft mass long test sample is replaced by a hard long test sample, wherein the hard long test sample passes through the annular groove of the upper insulating roller and the middle insulating roller to complete the insulation test.
Preferably, the anode conducting ring and the cathode conducting ring are arranged at the same end of the insulating roller, and the diameters of the anode conducting ring and the cathode conducting ring are different.
Preferably, the anode conductive ring and the cathode conductive ring are respectively arranged at two ends of the insulating roller.
Preferably, the insulating roller is connected to the bracket using a bearing.
Compared with the prior art, the invention has the following advantages:
the invention is suitable for the field insulation test before the use of live working tools, adopts the dynamic electrode which can reciprocate circularly to contact with the sample to be detected, so that the insulation detection can be finished when the insulation tool passes through the electrode, and simultaneously, the insulation detection of the interlayer voltage resistance and the creepage distance of flexible insulation shielding tools such as insulation blankets, insulation clothes and the like can be solved, the insulation detection is prevented from being single-faced and invalid, and the insulation detection can be finished by one person; the insulating property test device can test the insulating property of various special-shaped hot-line work insulating tools, timely eliminates the existence of unqualified tools, can be quickly assembled and disassembled, is convenient to carry, solves the problems of carrying and transportation, timely finds out the unqualified tools of the electrical property, and effectively performs the electrical test and the pre-test of the insulating tools.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of the structure of the soft bulk test specimen.
Fig. 2 is a schematic diagram of the structure of the soft long test sample detection.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention. In the following description, for the purpose of clearly illustrating the structure and operation of the present invention, reference will be made to the accompanying drawings by way of directional terms, but terms such as "front", "rear", "left", "right", "up", "down", etc. should be construed as words of convenience and should not be construed as limiting terms.
Example 1
A method for inspecting an insulated tool for live working, which employs an inspection apparatus shown in FIG. 1:
the detection device comprises a bracket 1, three insulating rollers 2 which are rotatably arranged on the bracket 1 at intervals, a plurality of anode strips 3 which are annularly and uniformly distributed on the surface of the insulating roller 2 along the axis of the insulating roller 2, a plurality of cathode strips 4 which are annularly and uniformly distributed on the surface of the insulating roller 2 along the axis of the insulating roller 2, an anode conducting ring 5 which is arranged at one end of the insulating roller 2, connected with each anode strip 3 and coaxial with the insulating roller 2, a cathode conducting ring 6 which is arranged at one end of the insulating roller 2, connected with each cathode strip 4 and coaxial with the insulating roller 2, an anode contact 7 which is fixedly arranged on the bracket 1 and is contacted with the anode conducting ring 5, a cathode contact 8 which is fixedly arranged on the bracket 1 and is contacted with the cathode conducting ring 6, and an anode test joint 9 which is fixedly arranged on the bracket, the cathode test joint 10 is fixedly arranged on the bracket 1 and is connected with the cathode contact 8 through a lead; the anode strips 3 and the cathode strips 4 are arranged in a staggered manner. One end of one upper insulating roller 2 is provided with an annular groove 11, and the anode sheet 3 and the cathode sheet 4 extend to the outer surface of the groove. The annular groove is simply referred to as an annular groove in the following, and the annular groove can realize the insulation detection of the long object.
In this embodiment, the anode conducting ring 5 and the cathode conducting ring 6 are disposed at the same end of the insulating roller 2, and the diameters of the anode conducting ring 5 and the cathode conducting ring 6 are different. Obviously, the anode conductive ring 5 and the cathode conductive ring 6 can also be respectively disposed at two ends of the insulating roller 2.
In this embodiment, the insulating roller 2 is connected to the bracket 1 by a bearing.
The detection method comprises the following steps:
connecting the anode test connector 9 and the cathode test connector 10 with a test instrument, and then passing the sample to be tested on the surface of the rotating insulating roller 2 to complete the insulation test. The samples to be detected comprise soft block test samples, hard block test samples, soft long test samples and hard long test samples.
When testing a soft block test specimen 20 (insulation blanket, insulation mat, etc.), as shown in fig. 1, the specific testing steps are as follows:
firstly, a user must wear a qualified insulating protective tool, and test instruments or equipment to be performed are prepared according to a test project to be performed, such as; a direct current resistance tester, a power frequency withstand voltage tester and the like;
secondly, connecting the testing instrument with the anode testing connector 9 and the cathode testing connector 10, starting up to detect that the insulation state of the electrodes is good, and shutting down;
thirdly, one end of the soft block-shaped test sample penetrates through the upper roller, is drawn out from the space between the upper roller and the middle roller, penetrates through the space between the middle roller and the lower roller, and is finally drawn out from the bottom of the lower roller; the soft block-shaped test sample is placed on the electrode in a curve and multi-fold manner, so that the simultaneous implementation of surface discharge insulation and interlayer insulation is ensured;
fourthly, starting a test instrument, adjusting to the parameters to be tested, and starting the test;
fifthly, the tester uses the insulation gloves or the insulation clamps to perform protection, and the soft blocky test sample is drawn at a constant speed until the test sample is separated from the insulation roller 2;
and sixthly, observing or displaying the reading of the used instrument while drawing the soft block-shaped test sample at a constant speed, recording, wherein the reading is larger than 700M omega in the whole process, namely the test sample is qualified, the test sample smaller than 700M omega is scrapped in time, and the test sample is forbidden to be used in live working.
When testing hard block-shaped test samples (insulating plates, insulating shells and the like), wherein the hard block-shaped test samples penetrate through the two insulating rollers 2 in a starting state during interlayer insulation test; in the creeping discharge insulation test, a hard block-shaped test sample is slid over the surface of the insulation roller 2 in the power-on state. The remainder was essentially identical to the procedure for the soft bulk test specimens.
Example 2
When testing a soft long test sample 30 (an insulating rope, an insulating tape, etc.), as shown in fig. 2, the testing apparatus is substantially the same as that of example 1, and the specific testing steps are as follows:
firstly, a user must wear a qualified insulating protective tool, and test instruments or equipment to be performed are prepared according to a test project to be performed, such as; a direct current resistance tester, a power frequency withstand voltage tester and the like;
secondly, connecting the testing instrument with the anode testing connector 9 and the cathode testing connector 10, starting up to detect that the insulation state of the electrodes is good, and shutting down;
thirdly, a soft long test sample (an insulating rope) penetrates through the annular groove of the upper roller electrode, so that the soft long test sample (the insulating rope) is wound in the upper roller for 2-4 circles in a normal way, and the longitudinal and transverse breakdown insulation tests are ensured to be carried out at the same part;
fourthly, starting a test instrument, adjusting to the parameters to be tested, and starting the test;
fifthly, the tester twitches the soft long test sample (the insulating rope) at a constant speed under the protection of using an insulating glove or an insulating clamp, and the soft long test sample (the insulating rope) is made of a long flexible material, so that when the soft long test sample (the insulating rope) is twitched, the soft long test sample is mainly observed not to be jammed and not to jump the groove, and the part which is drawn out is bound until the soft long test sample is separated from the insulating roller 2;
and sixthly, observing or displaying the reading of a using instrument while drawing the soft long test sample (the insulating rope) at a constant speed, recording, wherein the reading is larger than 700M omega in the whole process, namely the test sample is qualified, the test sample smaller than 700M omega is scrapped in time, and the test sample is forbidden to be used in live working.
When testing hard long test samples (insulating rods, insulating strips, etc.), wherein the hard long test samples are passed between the annular groove of the upper insulating drum 2 and the middle insulating drum 2, the insulation test is completed. The remainder was essentially identical to the procedure for the soft elongated test specimens.
In the above embodiment, the drum length L =60mm, the diameter Φ =20mm, the distance between the corresponding electrodes (cathode sheet 4, anode sheet 3) 20mm, and the width of each electrode 20 mm. But can be carried out in a unified test device, and a common insulation worker for live-wire work has an insulation operating rod, an insulation blanket, an insulation rope, and the like.
The invention adopts the insulating roller 2 with the electrodes (the cathode sheet 4 and the anode sheet 3) in an innovative way, when in use, the rotation of the insulating roller 2 and the movement of a test sample move synchronously, the rotating power drives the electrodes by drawing the test sample by a tester, the electrodes are ensured to be contacted uninterruptedly when the electrodes rotate and the test sample moves, when the test sample is completely drawn out and separated from the electrodes, the test can be finished, the electrodes are in 'up-down' and 'left-right' contact in the test sample, the omnibearing insulation detection is carried out, and the synchronous completion of the creeping discharge and the interlayer insulation of the test sample is ensured.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A detection method of an insulating tool for live working is characterized by adopting a detection device which comprises a support, three insulating rollers which are rotatably arranged on the support at intervals, a plurality of anode strips which are annularly and uniformly distributed on the surface of the insulating rollers along the axis of the insulating rollers, a plurality of cathode strips which are annularly and uniformly distributed on the surface of the insulating rollers along the axis of the insulating rollers, an anode conducting ring which is arranged at one end of the insulating rollers and is connected with each anode strip and is coaxial with the insulating rollers, a cathode conducting ring which is arranged at one end of the insulating rollers and is connected with each cathode strip and is coaxial with the insulating rollers, an anode contact which is fixedly arranged on the support and is in contact with the anode conducting ring, a cathode contact which is fixedly arranged on the support and is in contact with the cathode conducting ring, an anode test joint which is fixedly arranged on the support and is connected with the, A cathode test contact connected to the cathode contact via a wire; the anode strips and the cathode strips are arranged in a staggered manner; wherein, one end of at least one insulating roller is provided with an annular groove, and the anode sheet and the cathode sheet extend to the outer surface of the groove;
the detection method comprises the following steps:
and connecting the anode test connector and the cathode test connector with a test instrument, and then completing the insulation test of the sample to be tested from the surface of the rotating insulation roller.
2. The method for inspecting an insulated tool for hot-line work according to claim 1, wherein: the sample to be detected is a soft block test sample, and the specific detection steps are as follows:
firstly, preparing equipment and protecting;
secondly, connecting the testing instrument with the anode testing connector and the cathode testing connector, detecting that the insulation state of the electrode is good when the machine is started up, and shutting down the machine;
thirdly, one end of the soft block-shaped test sample penetrates through the upper roller, is drawn out from the space between the upper roller and the middle roller, penetrates through the space between the middle roller and the lower roller, and is finally drawn out from the bottom of the lower roller; the soft block-shaped test sample is placed on the electrode in a curve and multi-fold manner, so that the simultaneous implementation of surface discharge insulation and interlayer insulation is ensured;
fourthly, starting a test instrument, adjusting to the parameters to be tested, and starting the test;
fifthly, the tester twitches the soft block-shaped test sample at a constant speed until the test sample is separated from the insulating roller;
and sixthly, observing or displaying the reading of the used instrument while drawing the soft block-shaped test sample at a constant speed, and recording, wherein the reading is larger than 700M omega in the whole process, namely the test sample is qualified, and the test sample smaller than 700M omega is scrapped in time.
3. The method for inspecting an insulated tool for hot-line work according to claim 2, wherein: replacing the soft block-shaped test sample with a hard block-shaped test sample, wherein the hard block-shaped test sample passes through the two insulating rollers in a starting state during an interlayer insulation test; in the creeping discharge insulation test, a hard block-shaped test sample is slipped over the surface of an insulation roller in a starting state.
4. The method for inspecting an insulated tool for hot-line work according to claim 1, wherein: the sample to be detected is a soft long test sample, and the specific detection steps are as follows:
firstly, preparing equipment and protecting;
secondly, connecting the testing instrument with the anode testing connector and the cathode testing connector, detecting that the insulation state of the electrode is good when the machine is started up, and shutting down the machine;
thirdly, the soft long test sample penetrates through the annular groove of the upper roller electrode, so that the soft long test sample cable is wound in the upper roller for 2-4 circles, and the longitudinal and transverse breakdown insulation tests are ensured to be carried out at the same part;
fourthly, starting a test instrument, adjusting to the parameters to be tested, and starting the test;
fifthly, the tester twitches the soft long test sample at a constant speed;
and sixthly, observing or displaying the reading of the used instrument while drawing the soft long test sample at a constant speed, recording, wherein the reading is larger than 700M omega in the whole process, namely the test sample is qualified, and the test sample smaller than 700M omega is scrapped in time.
5. The method for inspecting an insulated tool for hot-line work according to claim 4, wherein: and replacing the soft mass long test sample with a hard long test sample, wherein the hard long test sample passes through the annular groove of the upper insulating roller and the middle insulating roller to complete the insulation test.
6. The method for inspecting an insulated tool for hot-line work according to any one of claims 1 to 5, wherein: the anode conducting ring and the cathode conducting ring are arranged at the same end of the insulating roller, and the diameters of the anode conducting ring and the cathode conducting ring are different.
7. The method for inspecting an insulated tool for hot-line work according to any one of claims 1 to 5, wherein: the anode conducting ring and the cathode conducting ring are respectively arranged at two ends of the insulating roller.
8. The method for inspecting an insulated tool for hot-line work according to any one of claims 1 to 5, wherein: the insulating roller is connected with the bracket by adopting a bearing.
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| CN201911083689.8A CN110865282B (en) | 2019-11-07 | 2019-11-07 | Detection method of insulating tool for live-wire work |
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| CN208520956U (en) * | 2018-06-13 | 2019-02-19 | 国网冀北电力有限公司秦皇岛供电公司 | Hand-rail type insulating rope voltage resistant test frame |
| CN208654276U (en) * | 2018-08-03 | 2019-03-26 | 国网甘肃省电力公司电力科学研究院 | A kind of insulating rope voltage resistant test frame |
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| JPH10123195A (en) * | 1996-10-17 | 1998-05-15 | Fujikura Ltd | Method and device for detecting defect of insulation electric wire |
| JP2004171825A (en) * | 2002-11-18 | 2004-06-17 | Sony Corp | Detection device of transparent insulation film |
| CN101672886A (en) * | 2009-09-30 | 2010-03-17 | 咸阳供电局 | Insulating rope voltage resistant test device |
| CN102736005A (en) * | 2012-07-19 | 2012-10-17 | 江西赣州供电公司 | Insulating rope sectional withstand voltage test device |
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| CN110865282B (en) | 2021-10-01 |
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