CN202886528U - Test device for identifying high-voltage cables - Google Patents
Test device for identifying high-voltage cables Download PDFInfo
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- CN202886528U CN202886528U CN 201220593365 CN201220593365U CN202886528U CN 202886528 U CN202886528 U CN 202886528U CN 201220593365 CN201220593365 CN 201220593365 CN 201220593365 U CN201220593365 U CN 201220593365U CN 202886528 U CN202886528 U CN 202886528U
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- 238000012360 testing method Methods 0.000 title abstract description 20
- 239000003990 capacitor Substances 0.000 claims abstract description 16
- 238000012545 processing Methods 0.000 claims abstract description 11
- 238000009434 installation Methods 0.000 claims description 12
- 230000015556 catabolic process Effects 0.000 claims description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 6
- 239000002184 metal Substances 0.000 abstract description 6
- 238000007599 discharging Methods 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 abstract description 3
- 239000004020 conductor Substances 0.000 abstract 1
- 239000004973 liquid crystal related substance Substances 0.000 description 6
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 241000272165 Charadriidae Species 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012850 discrimination method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model provides a test device for identifying high-voltage cables with strong induced electricity. The device comprises an electronic high-frequency high-voltage signal generator and a signal receiving device. The electronic high-frequency high-voltage signal generator comprises an electronic high-frequency high-voltage DC (direct current) generation module, a pulse capacitor, a discharge unit, a battery and a low-voltage control circuit. The signal receiving device is connected with flexible coils and consists of a signal processing unit and a waveform display device. When the device works, the high-voltage output end of the electronic high-frequency high-voltage signal generator is respectively connected between the metal conductor of the tested cable and ground, and used for periodically discharging the cables. The flexible coils are used for collecting the discharge signals of each cable in the groove, transmitting the signals to the signal processing unit, and judging whether a cable is the tested cable according to the corresponding displayed waveform. The device can effectively identify the cable to be identified. The power is supplied from the battery and the requirements on the operation environment are low, so that the device is convenient to carry and use; the device can effectively resist the influence on the tested cables caused by the induced voltage; and the device is safe and convenient to operate.
Description
Technical field
The proving installation that high-tension cable is differentiated under a kind of strong induced electricity belongs to the cable testing equipment field, more particularly, relates to the proving installation that a kind of high-tension cable is differentiated.
Background technology
Because urban renewal, present high-tension cable mostly is laid in the private cable ditch, the many cables but the raceway groove back warp often can walk abreast, and this brings huge difficulty to searching and identifying of cable.Present stage, commonly used cable discrimination method was to the multicore high-tension cable poor effect of UHV (ultra-high voltage) single core cable and voltage levels, was difficult to accurately judge the cable of testing.Because extra-high-tension cable and other voltage levels cables are difficult to accurately find the test cable of wanting in cable duct when breaking down or overhaul, must carry out the separate discriminating of cable.In traditional discrimination process, because the impact of operation cable induction voltage, induced voltage is fought back testing tool on the one hand, causes easily instrument internal to damage; On the other hand, the signal intensity of induced voltage will surpass the intensity of the detection signal that testing tool provides, and causes easily erroneous judgement disconnected.Therefore, it is all the more necessary to design method of testing and device that a kind of high-tension cable differentiates.
The proving installation that high-tension cable is differentiated is a kind of new method and instrumentation that high-tension cable is carried out the phase place discriminating.It is comprised of signal generator and receiving trap two parts, can simply, fast, accurately find tested cable, can find fast tested cable in conduit line, reduces workload, increases work efficiency.
Summary of the invention
The technical problems to be solved in the utility model is: design and a kind ofly can adapt to strong induced electricity, carry out fast the proving installation that high-tension cable is differentiated, can simply, fast, accurately find tested cable, reduce workload, increase work efficiency.
For achieving the above object, the device that the utility model provides a kind of high-tension cable to differentiate, it comprises: electronic type high-frequency high-voltage signal generator and signal receiving device.
Described electronic type high-frequency high-voltage signal generator comprises: electronic type high-frequency high-voltage direct-current generation module, impulse capacitor, discharge cell, low-voltage control circuit and chargeable high-capacity lithium battery; The output terminal of battery is connected to electronic type high-frequency and high-voltage generation module, and is connected to impulse capacitor, is the impulse capacitor charging; The low-pressure side of electronic type high-frequency high-voltage direct-current generation module connects gauge tap and pulse voltage indicating gauge, the high-voltage output end of electronic type high-frequency and high-voltage generation module is connected to discharge cell by impulse capacitor, low-voltage control circuit connects respectively described electronic type high-frequency high-voltage direct-current generation module and discharge cell, come the operated discharge unit by low-voltage control circuit, the energy that is stored on the impulse capacitor is discharged on the measured target cable; Described signal receiving device comprises signal processing unit and display, and the input end of described signal processing unit connects flexible coil; Described flexible coil gathers the signal on the cable, is connected to signal processing unit, and the signal waveform that finally collects is shown on the display, and whether signal receiving device is judged according to shown waveform and be the measured target cable and shown at display.
Described electronic type high-frequency high-voltage signal generator also comprises a discharge cell, be connected between described electronic type high-frequency high-voltage signal generator output end and the ground, when electronic type high-frequency high-voltage signal generator is worked, form over the ground a protection gap, when induced voltage during greater than 4kV, the gap is breakdown, over the ground discharge, protection electronic type high-frequency high-voltage signal generator; When electronic type high-frequency high-voltage signal generator power is closed with accident power-off, this discharge cell shorted to earth.
Described signal receiving device includes the bandpass filter that centre frequency is 2kHz.
The utility model has the advantages that: the proving installation that adopts a kind of high-tension cable described in the utility model to differentiate, can effectively protect testing tool can not damage by sensed voltage breakdown; Also can avoid to find quickly and accurately tested cable owing to the too high erroneous judgement that causes of induced voltage is disconnected; Device adopts powered battery, can adapt to complicated working environment, needn't be subjected to the impact of device power supply; This method of testing differentiates that accuracy rate is high, and instrumentation is simple, portable; Save a large amount of human and material resources and financial resources.
Description of drawings
Fig. 1 is principle of work synoptic diagram of the present utility model.
Fig. 2 is the theory diagram of electronic type high-frequency high-voltage signal generator.
Fig. 3 is the realization block diagram of signal receiving device.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
As shown in Figure 1, basic functional principle of the present utility model is: the metal core wire of tested cable (or metal sheath) is connected by short-circuit line between test end and the earth; At test lead, apply the high-voltage discharging signal of one-period to moment between the metal core wire of tested cable (terminal corresponding to the test among a) and the earth, make between tested cable and the earth and form discharge loop; In conduit line, use flexible coil that every cable is tested, gather the signal on the every cable, watch the signal waveform that collects, determine whether tested cable according to display waveform, automatically draw identification result.
It is to adopt 5kV/10 μ F to carry out the energy storage discharge that moment applies signal, and high tension voltage is 3kV, and the cycle of cyclical signal is that 6s to 15s can set, and the Zhou Changda 1m of flexible coil, diameter are 30cm.
The proving installation that high-tension cable described in the utility model is differentiated comprises: electronic type high-frequency high-voltage signal generator and signal receiving device.
As shown in Figure 2, described electronic type high-frequency high-voltage signal generator comprises: electronic type high-frequency high-voltage direct-current generation module, impulse capacitor, two discharge cells, low-voltage control circuit and chargeable high-capacity lithium batteries; The output terminal of battery is connected to electronic type high-frequency and high-voltage generation module, and is connected to impulse capacitor, is the impulse capacitor charging; The low-pressure side of electronic type high-frequency high-voltage direct-current generation module connects gauge tap and pulse voltage indicating gauge, and the high-voltage output end of electronic type high-frequency and high-voltage generation module is connected to discharge cell by impulse capacitor, the withstand voltage 5kV that reaches; Low-voltage control circuit connects respectively described electronic type high-frequency high-voltage direct-current generation module and discharge cell, come the operated discharge unit by low-voltage control circuit, a discharge cell is discharged into the energy that is stored on the impulse capacitor on the measured target cable, and pulse voltage can reach 3kV; Another discharge cell (can omit) is connected between described electronic type high-frequency high-voltage signal generator output end and the ground, when electronic type high-frequency high-voltage signal generator is worked, form over the ground a protection gap, when induced voltage during greater than 4kV, the gap is breakdown, over the ground discharge, protection electronic type high-frequency high-voltage signal generator; When electronic type high-frequency high-voltage signal generator power is closed with accident power-off, this discharge cell shorted to earth.
As shown in Figure 3, described signal receiving device comprises signal processing unit and display, and the input end of described signal processing unit connects flexible coil; Described flexible coil gathers the signal on the cable, be connected to signal processing unit, the signal waveform that finally collects is shown on the display, signal receiving device according to the polarity of shown waveform, signal amplitude and discharge time the interval judge and whether be the measured target cable and shown.If it is target cable that signal receiving device is judged current test cable, liquid crystal display shows " √ "; If current judgement test cable is not target cable, liquid crystal display shows " * ".
The course of work of the proving installation that described high-tension cable is differentiated is as follows:
1) metal core wire of tested cable is connected by short-circuit line between cable end piece and sheath, the earth.
2) at test lead, " cable " test clip of the output line of electronic type high-frequency high-voltage signal generator is connected to the metal core wire of tested cable, " ground connection " test clip of output line is connected to sheath, and sheath is wanted good earth.
3) open the switch of electronic type high-frequency high-voltage signal generator, set discharge cycle, the cycle can be set between 6s to 15s.Press switch knob, generator output high pressure, to tested cable discharge, every interval discharge cycle applies the high-voltage discharging signal of a 3kV between tested cable and the earth, makes between tested cable and the earth, the sheath and forms discharge loop.
4) in the conduit line that excavates, find many cables side by side, make its a little built on stilts, there are the needs of ponding to drain water.
5) flexible coil and signal receiving device are coupled together, the use flexible coil is measured the discharge signal on each bar cable, if tested cable, when fixedly discharge cycle discharges, show the larger positive dirction pulse of amplitude at signal receiving device, the signal period that shows is that instrument is judged as target cable when setting discharge cycle in the step 3, shows " √ " symbol in the liquid crystal upper right corner; Otherwise it is not target cable that instrument is judged, then can show " * " symbol, and the discharge waveform amplitude of liquid crystal display is less.
The proving installation of this method of testing design is fit to single core cable and most multicore high-tension cable.
The below is the embodiment that a high-tension cable is differentiated.
Differentiate that the high-tension cable parameter is as follows.
Model: YJV-6/10kV; Cross section: 185mm
2System of laying: tunnel style; Cable side by side: 5.
1, wiring.
The A of cable mutually endways with sheath, the earth short circuit, " cable " output terminal of electronic type high-frequency high-voltage signal generator is connected to the test lead of A phase, " ground connection " end of signal generator is connected to sheath, sheath must good earth; The Signal plug of flexible coil is inserted on the socket of signal receiving device.
2, test.
Open the switch of electronic type high-frequency high-voltage signal generator, begin cable is carried out periodic discharging, the setting discharge cycle is 6s.Tunnel location in that needs are differentiated has 5 cables to move towards side by side, and all the other 4 cables are charging operation.Use flexible coil to test respectively 5 cables, on 4 cables slight discharge waveform is arranged therein, amplitude is less, and discharge waveform polarity is for negative, and the signal receiving device liquid crystal display is " * ", namely is not tested cable; When a cable was tested, the waveforms amplitude that receiving trap shows was larger, and shows that twice discharge is spaced apart 6s, and discharge waveform polarity is for just, and installing liquid crystal display is " √ ", is test cable.
Can find out that from above example the utility model can find quickly and accurately and be differentiated cable, complete realistic requirements of one's work.
Claims (3)
1. the proving installation differentiated of high-tension cable, it is characterized in that: comprise electronic type high-frequency high-voltage signal generator and signal receiving device, described electronic type high-frequency high-voltage signal generator comprises: electronic type high-frequency high-voltage direct-current generation module, impulse capacitor, discharge cell, low-voltage control circuit and chargeable high-capacity lithium battery; The output terminal of battery is connected to electronic type high-frequency and high-voltage generation module, and is connected to impulse capacitor, is the impulse capacitor charging; The low-pressure side of electronic type high-frequency high-voltage direct-current generation module connects gauge tap and pulse voltage indicating gauge, the high-voltage output end of electronic type high-frequency and high-voltage generation module is connected to discharge cell by impulse capacitor, low-voltage control circuit connects respectively described electronic type high-frequency high-voltage direct-current generation module and discharge cell, come the operated discharge unit by low-voltage control circuit, the energy that is stored on the impulse capacitor is discharged on the measured target cable; Described signal receiving device comprises signal processing unit and display, and the input end of described signal processing unit connects flexible coil; Described flexible coil gathers the signal on the cable, is connected to signal processing unit, and the signal waveform that finally collects is shown on the display, and whether signal receiving device is judged according to shown waveform and be the measured target cable and shown at display.
2. the proving installation differentiated of high-tension cable as claimed in claim 1, it is characterized in that: comprise that also a discharge cell is connected between described electronic type high-frequency high-voltage signal generator output end and the ground, when electronic type high-frequency high-voltage signal generator is worked, form over the ground a protection gap, when induced voltage during greater than 4kV, the gap is breakdown, over the ground discharge, protection electronic type high-frequency high-voltage signal generator; When electronic type high-frequency high-voltage signal generator power is closed with accident power-off, this discharge cell shorted to earth.
3. the proving installation differentiated of high-tension cable as claimed in claim 1, it is characterized in that: described signal receiving device includes the bandpass filter that centre frequency is 2kHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220593365 CN202886528U (en) | 2012-11-12 | 2012-11-12 | Test device for identifying high-voltage cables |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220593365 CN202886528U (en) | 2012-11-12 | 2012-11-12 | Test device for identifying high-voltage cables |
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| Publication Number | Publication Date |
|---|---|
| CN202886528U true CN202886528U (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220593365 Expired - Lifetime CN202886528U (en) | 2012-11-12 | 2012-11-12 | Test device for identifying high-voltage cables |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459237A (en) * | 2014-12-16 | 2015-03-25 | 国家电网公司 | Signal generator for cable recognition device |
| CN104764973A (en) * | 2015-04-03 | 2015-07-08 | 苏州经贸职业技术学院 | Induction type wiring harness detection system and method |
| CN104914291A (en) * | 2015-06-01 | 2015-09-16 | 苏州市华安普电力工程有限公司 | Cable identification instrument device |
| CN105762715A (en) * | 2016-04-23 | 2016-07-13 | 安徽意力电缆有限公司 | Cable wellhead pulley based on radio frequency tag |
-
2012
- 2012-11-12 CN CN 201220593365 patent/CN202886528U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459237A (en) * | 2014-12-16 | 2015-03-25 | 国家电网公司 | Signal generator for cable recognition device |
| CN104764973A (en) * | 2015-04-03 | 2015-07-08 | 苏州经贸职业技术学院 | Induction type wiring harness detection system and method |
| CN104914291A (en) * | 2015-06-01 | 2015-09-16 | 苏州市华安普电力工程有限公司 | Cable identification instrument device |
| CN105762715A (en) * | 2016-04-23 | 2016-07-13 | 安徽意力电缆有限公司 | Cable wellhead pulley based on radio frequency tag |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130417 |
|
| CX01 | Expiry of patent term |