CN110957675B - Withstand voltage testing device for underground cable laying - Google Patents
Withstand voltage testing device for underground cable laying Download PDFInfo
- Publication number
- CN110957675B CN110957675B CN201911155033.2A CN201911155033A CN110957675B CN 110957675 B CN110957675 B CN 110957675B CN 201911155033 A CN201911155033 A CN 201911155033A CN 110957675 B CN110957675 B CN 110957675B
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- cable
- test
- ring
- testing
- terminal
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- 238000012360 testing method Methods 0.000 title claims abstract description 86
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000004576 sand Substances 0.000 claims abstract description 15
- 229910052742 iron Inorganic materials 0.000 claims abstract description 14
- 238000004804 winding Methods 0.000 claims abstract description 14
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 7
- 238000010276 construction Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/06—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle
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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
- G01R31/1227—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 of components, parts or materials
- G01R31/1263—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 of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—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 of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
A withstand voltage testing device for laying underground cables comprises a cable roller and a roller frame, wherein the cable roller is used for winding cables, and the pressure testing device also comprises a swing frame used for preventing the cables from being wound unevenly; the cable drum is connected with a winding motor through a speed reducer, and the swing frame is connected with a driving motor through a crank slider mechanism; the crank slider mechanism is connected with a test ring, the test ring is connected with one test terminal of the pressurization test device, and the other test terminal of the pressurization test device is connected with a lead in a cable; two ends of the test ring are respectively adsorbed with an annular magnet, and iron sand is adsorbed on the annular magnet; the cable penetrates through the test ring and the inner ring of the annular magnet and is in contact with the iron sand. The invention has the advantages of low cost, small occupied area, convenient test, convenient laying construction, rapid finding of leakage points and high reliability.
Description
Technical Field
The invention relates to the technical field of power supply safety, in particular to a withstand voltage testing device for laying an underground cable.
Background
The withstand voltage test is carried out to the cable before laying, and especially the cable of laying underground, in case the electric leakage condition appears, difficult maintenance and loss are huge. The underground laid cables are mostly large cables with large wire diameter, long length and heavy weight, and the pressure resistance test requires a large field and a test device, which cannot be realized in field construction.
In a cable laying site, a voltage withstand test device which occupies a small area, is convenient to test and lay and can quickly find a leakage point is needed.
Disclosure of Invention
In order to overcome the defects in the background art, the invention discloses a withstand voltage testing device for laying underground cables, which aims to: the voltage-withstanding testing device has the advantages of small occupied area, convenience in testing, convenience in laying construction and capability of finding out a leakage point quickly.
In order to achieve the purpose, the invention adopts the following technical scheme:
a withstand voltage testing device for laying underground cables comprises a cable roller and a roller frame, wherein the cable roller is used for winding cables, and the pressure testing device also comprises a swing frame used for preventing the cables from being wound unevenly; the cable drum is connected with a speed reducer and a winding motor which are arranged on the drum frame; the rocking frame comprises a crank-slider mechanism, and the crank-slider mechanism is connected with a driving motor; the slider of the slider-crank mechanism is connected with a test ring in an insulating way, the test ring is connected with one test terminal of the pressurizing test device, and the other test terminal of the pressurizing test device is connected with a lead in a cable; two ends of the test ring are respectively connected with an annular magnet, and iron sand is magnetically adsorbed between inner holes of the two annular magnets; the cable penetrates through the test ring and the inner ring of the annular magnet and is in annular contact with the iron sand.
Further improve technical scheme, the cable cylinder is wooden insulating cylinder, and the cable winding is installed the insulator cap in the one end of cable cylinder.
According to the technical scheme, the test terminal connected with the test ring of the pressurization test device is a low-voltage terminal, and the test terminal connected with the lead in the cable of the pressurization test device is a high-voltage terminal.
Due to the adoption of the technical scheme, compared with the background technology, the invention has the following beneficial effects:
after being led out from the packaging roller, the cable can be directly wound on the cable roller, so that the occupation of the cable on a construction site is reduced, the cable is prevented from being dragged on the site, and the labor intensity of a constructor is reduced. After the withstand voltage test is completed, the cable is completely wound on the cable drum, the cable can be directly led out from the cable drum, underground laying is carried out, and laying construction is facilitated. Because the volume of the test ring and the inner ring of the annular magnet is small and the length is not large, the leakage point can be quickly and accurately found. The iron sand has small granularity, can be in annular contact with the insulating layer of the cable, does not leave a test dead zone, and ensures the test quality.
The invention has the advantages of low cost, small occupied area, convenient test, convenient laying construction, rapid finding of leakage points and high reliability.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of a voltage withstand test structure of the present invention.
In the figure: 1. a cable drum; 2. a swing frame; 3. a slider-crank mechanism; 4. a test ring; 5. a pressure test device; 6. a ring magnet; 7. iron sand; 8. an electrical cable.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
A withstand voltage testing device for laying underground cables comprises a cable roller 1 for winding cables, a roller frame and a swing frame 2 for preventing the cables from being wound unevenly, as shown in figure 1. The cable drum 1 is connected with the winding motor through the speed reducer, wherein the speed reducer and the winding motor are fixed on the drum frame, the speed reducing shaft of the speed reducer is connected with the cable drum 1, and the winding motor drives the cable drum 1 to wind the cable 8 through the speed reducer. The cables which are usually purchased are all packaged by the drum, and the cables are directly wound on the cable drum 1 after being led out from the packaging drum, so that the occupation of the cables 8 on a construction site is reduced, the cables are prevented from being dragged on the site, and the labor intensity of constructors is reduced.
In order to prevent electric shock, the cable drum 1 is a wooden insulating drum, and an insulating cap is installed at one end, located on the cable drum 1, of the cable 8.
The crank-slider mechanism 3 is arranged on the rocking frame 2, the crank-slider mechanism 3 is connected with the driving motor, and when the driving motor rotates, the slider can do reciprocating translation motion along the guide rail. The slider of the slider-crank mechanism 3 is connected with a test ring 4 through an insulating column, the test ring 4 is connected with one test terminal of a pressurizing test device 5, and the other test terminal of the pressurizing test device 5 is connected with a lead in a cable 8; two ends of the test ring 4 are respectively connected with an annular magnet 6, and iron sand 7 is magnetically adsorbed between inner holes of the two annular magnets 6. The cable 8 penetrates through the test ring 4 and the inner ring of the ring magnet 6 and is in annular contact with the iron sand 7.
The cable 8 penetrates through the inner ring of the test ring 4, so that the cable 8 does reciprocating translation motion along with the sliding block, and the cable 8 can be prevented from being unevenly wound when wound on the cable drum 1. The test terminal that pressurization testing arrangement 5 and test ring 4 are connected is the low pressure terminal, and the low pressure terminal passes through test ring 4, annular magnet 6 and is connected with indisputable sand 7. The test terminal of the pressure test device 5 connected with the conducting wire in the cable 8 is a high-voltage terminal.
During operation, as shown in fig. 1-2, one end of the cable 8 passes through the testing ring 4 and the inner ring of the annular magnet 6 and is fixed with the cable roller 1, the winding motor drives the cable roller 1 to rotate, the cable 8 is pulled to penetrate out of the testing ring 4 and the inner ring of the annular magnet 6, and the driving motor drives the testing ring 4 to perform reciprocating translation motion through the crank-slider mechanism, so that the cable 8 is uniformly wound.
At this time, the high-voltage terminal of the pressure test device 5 is electrically connected to the lead at the other end of the cable 8, and the low-voltage terminal of the pressure test device 5 is electrically connected to the iron sand 7. The outer wall of the insulating layer of the cable 8 is full of conductive iron sand 7, and the inner wall of the insulating layer of the cable 8 is in contact with a lead with high voltage. As the cable 8 is progressively wound around the cable drum 1, the cable 8 is continually threaded out of the test ring 4 and the inner ring of the ring magnet 6. Because of the strong magnetic adsorption force of the annular magnets 6, the iron sand 7 is always positioned between the inner holes of the two annular magnets 6 and cannot be taken away by the cable 8. The iron sand 7 has small granularity, can be in annular contact with the insulating layer of the cable 8, does not leave a test dead zone, and ensures the test quality.
Once the insulating layer of the cable 8 has a leakage point, the current is generated on the low-voltage terminal, and the pressurization testing device 5 sends out a leakage alarm. Because the test ring 4 and the inner ring of the ring magnet 6 have small volume and small length, the leakage point can be quickly and accurately found.
After withstand voltage test accomplished, cable 8 is by the complete winding on cable drum 1, can directly derive cable 8 from cable drum 1, lays underground, has made things convenient for the construction of laying.
The details of which are not described in the prior art. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. The utility model provides an underground cable lays and uses withstand voltage testing arrangement which characterized by: the cable winding device comprises a cable roller (1) for winding a cable, a roller frame and a swing frame (2) for preventing the cable from being wound unevenly; the cable drum (1) is connected with a speed reducer and a winding motor which are arranged on the drum frame; the rocking frame (2) comprises a crank-slider mechanism (3), and the crank-slider mechanism (3) is connected with a driving motor; a testing ring (4) is connected to a sliding block of the crank sliding block mechanism (3) in an insulating mode, the testing ring (4) is connected with one testing terminal of the pressurizing testing device (5), and the other testing terminal of the pressurizing testing device (5) is connected with a lead in a cable (8); two ends of the test ring (4) are respectively connected with an annular magnet (6), and iron sand (7) is magnetically adsorbed between inner holes of the two annular magnets (6); the cable (8) penetrates through the test ring (4) and the inner ring of the annular magnet (6) and is in annular contact with the iron sand (7); the test terminal connected with the test ring (4) by the pressurization test device (5) is a low-voltage terminal, and the test terminal connected with the lead in the cable (8) by the pressurization test device (5) is a high-voltage terminal.
2. The apparatus of claim 1, wherein: the cable drum (1) is a wooden insulating drum, and an insulating cap is installed at one end, wound on the cable drum (1), of the cable (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911155033.2A CN110957675B (en) | 2019-11-22 | 2019-11-22 | Withstand voltage testing device for underground cable laying |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911155033.2A CN110957675B (en) | 2019-11-22 | 2019-11-22 | Withstand voltage testing device for underground cable laying |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110957675A CN110957675A (en) | 2020-04-03 |
| CN110957675B true CN110957675B (en) | 2021-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911155033.2A Active CN110957675B (en) | 2019-11-22 | 2019-11-22 | Withstand voltage testing device for underground cable laying |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111366823B (en) * | 2020-04-08 | 2022-06-24 | 深圳市鹏盛达工程测试有限公司 | Device and method for detecting withstand voltage of cable |
| CN112731195A (en) * | 2020-12-29 | 2021-04-30 | 盐城市雷击环保科技有限公司 | Sample power detection mechanism for outdoor emergency power supply research and development |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4164703A (en) * | 1977-12-19 | 1979-08-14 | Western Electric Company, Inc. | Methods of and apparatus for detecting openings in cable jackets |
| CN201697996U (en) * | 2010-02-04 | 2011-01-05 | 厦门中唐电气有限公司 | Withstand voltage and leakage testing device for insulated safety device |
| CN204008973U (en) * | 2014-06-26 | 2014-12-10 | 河南开启电力实业有限公司 | The online power frequency withstand test device of power cable |
| EP3098613A1 (en) * | 2015-05-28 | 2016-11-30 | Services Pétroliers Schlumberger | System and method for monitoring the performances of a cable carrying a downhole assembly |
| CN105954659A (en) * | 2016-07-01 | 2016-09-21 | 国网新疆电力公司昌吉供电公司 | Insulated rope voltage-withstand test device |
| CN206069073U (en) * | 2016-08-30 | 2017-04-05 | 天津市旺恒科技有限公司 | A kind of cable winding system |
| CN207380180U (en) * | 2017-08-30 | 2018-05-18 | 广西电网有限责任公司电力科学研究院 | A kind of high-voltage cable insulating burn in test circuit |
| CN207293805U (en) * | 2017-09-18 | 2018-05-01 | 上海上缆神舟线缆有限公司 | Wire rod rewinder |
| CN108535604A (en) * | 2018-06-05 | 2018-09-14 | 贵州遵义巴斯巴科技发展有限公司 | Pressure-resistant testing machine is connected in cable |
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