CN202614890U - Ultrasonic detector for detecting partial discharges of cable terminal and intermediate head - Google Patents
Ultrasonic detector for detecting partial discharges of cable terminal and intermediate head Download PDFInfo
- Publication number
- CN202614890U CN202614890U CN 201220106992 CN201220106992U CN202614890U CN 202614890 U CN202614890 U CN 202614890U CN 201220106992 CN201220106992 CN 201220106992 CN 201220106992 U CN201220106992 U CN 201220106992U CN 202614890 U CN202614890 U CN 202614890U
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- CN
- China
- Prior art keywords
- main frame
- intermediate head
- ultrasonic detector
- cable terminal
- display module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to an ultrasonic detector for detecting partial discharges of a cable terminal and an intermediate head. The ultrasonic detector comprises a gauge rod, an acoustic emission sensor, a preamplifier, a host and an externally-connected oscilloscope. One end of the gauge rod is connected with the cable terminal while the other end is connected with the host sequentially through the acoustic emission sensor and the preamplifier. The externally-connected oscilloscope is connected with the host. Compared with the prior art, the ultrasonic detector provided in the utility model has the advantages of having high detection accuracy and guaranteeing a safety distance between an operator and an electrified facility, etc.
Description
Technical field
The utility model relates to a kind of detector of power domain, especially relates to a kind of ultrasound measuring instrument that is used to measure cable termination and intermediate head shelf depreciation.
Background technology
The discharge that the power equipment insulation takes place in the subrange under enough strong electric field action.This discharge does not form conductive channel only to cause insulation local short (road and bridge) between conductor and connect and exceeds.Shelf depreciation all can have some influences to insulating medium each time, and slight shelf depreciation is less to the influence of power equipment insulation, and the decline of dielectric strength is slower; And strong shelf depreciation then can make dielectric strength descend very soon.This is a key factor that makes the high voltage electric power equip ment insulation damages.Therefore, during the insulation of design high voltage electric power equip ment, consider under the effect of long-term work voltage, not allow to take place in the insulation system stronger shelf depreciation.To strengthen monitoring to operating equipment, when the Where topical discharge surpasses to a certain degree, should equipment is out of service, overhaul or change.In actual motion, cable termination and intermediate head place are prone to produce partial discharge phenomenon.At present this problem do not had solution well.
The utility model content
The purpose of the utility model be exactly provide in order to overcome the defective that above-mentioned prior art exists a kind of accuracy in detection high and guarantee operating personnel and charging equipment have enough safe distances be used to measure the ultrasound measuring instrument of cable termination and intermediate head shelf depreciation.
The purpose of the utility model can realize through following technical scheme:
A kind of ultrasound measuring instrument that is used to measure cable termination and intermediate head shelf depreciation; It is characterized in that; Comprise feeler, calibrate AE sensor, prime amplifier, main frame and external oscillograph; One end stube cable of described feeler, the other end connect main frame through calibrate AE sensor, prime amplifier successively, and described external oscillograph connects main frame.
Described main frame comprises wave filter, tuned amplifier and signal display module, and an end of described wave filter connects prime amplifier, and the other end connects tuned amplifier and signal display module successively, and described signal display module is connected with external oscillograph.
Compared with prior art, the utility model accuracy in detection height and assurance operating personnel and charging equipment have enough safe distances.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Among the figure: 1-cable, 2-feeler, 3-calibrate AE sensor, 4-signal display module, 5-tuned amplifier, 6-wave filter, 7-prime amplifier, the external oscillograph of 8-, 9-main frame.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is elaborated.
Embodiment
As shown in Figure 1; A kind of ultrasound measuring instrument that is used to measure cable termination and intermediate head shelf depreciation; Comprise feeler 2, calibrate AE sensor 3, prime amplifier 7, main frame 9 and external oscillograph 8; One end stube cable 1 of feeler 2, the other end connect main frame 9 through calibrate AE sensor 3, prime amplifier 7 successively, and external oscillograph 8 connects main frame 9.
Main frame 9 comprises wave filter 6, tuned amplifier 5 and signal display module 4, and an end of wave filter 6 connects prime amplifier 7, and the other end connects tuned amplifier 5 and signal display module 4 successively.
Wherein, feeler 2 is used for the conducted acoustic waves signal, when detecting the shelf depreciation of 35kV and following midium voltage cable terminals, adopts the spun glass feeler; When the intermediate head that detects high pressure and midium voltage cable, can be without fiberglass pole, directly with the surface of calibrate AE sensor contact at joint.Feeler has enough dielectric strengths, both can acoustical signal be conducted truly (only introducing about 30% decay), can guarantee that again operating personnel and charging equipment have enough safe distances, is convenient to promote in the online detection at the scene.
Claims (2)
1. ultrasound measuring instrument that is used to measure cable termination and intermediate head shelf depreciation; It is characterized in that; Comprise feeler, calibrate AE sensor, prime amplifier, main frame and external oscillograph; One end stube cable of described feeler, the other end connect main frame through calibrate AE sensor, prime amplifier successively, and described external oscillograph connects main frame.
2. a kind of ultrasound measuring instrument that is used to measure cable termination and intermediate head shelf depreciation according to claim 1; It is characterized in that; Described main frame comprises wave filter, tuned amplifier and signal display module; One end of described wave filter connects prime amplifier, and the other end connects tuned amplifier and signal display module successively, and described signal display module is connected with external oscillograph.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220106992 CN202614890U (en) | 2012-03-20 | 2012-03-20 | Ultrasonic detector for detecting partial discharges of cable terminal and intermediate head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220106992 CN202614890U (en) | 2012-03-20 | 2012-03-20 | Ultrasonic detector for detecting partial discharges of cable terminal and intermediate head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202614890U true CN202614890U (en) | 2012-12-19 |
Family
ID=47348579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220106992 Expired - Lifetime CN202614890U (en) | 2012-03-20 | 2012-03-20 | Ultrasonic detector for detecting partial discharges of cable terminal and intermediate head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202614890U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103399265A (en) * | 2013-08-13 | 2013-11-20 | 国家电网公司 | High voltage cable terminal partial discharge ultrasonic monitor |
| CN110161386A (en) * | 2019-05-06 | 2019-08-23 | 贵州电网有限责任公司 | A kind of portable high-pressure cable connector local discharge detection device and method |
-
2012
- 2012-03-20 CN CN 201220106992 patent/CN202614890U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103399265A (en) * | 2013-08-13 | 2013-11-20 | 国家电网公司 | High voltage cable terminal partial discharge ultrasonic monitor |
| CN103399265B (en) * | 2013-08-13 | 2015-08-19 | 国家电网公司 | A kind of high voltage cable terminal partial discharge ultrasonic monitor |
| CN110161386A (en) * | 2019-05-06 | 2019-08-23 | 贵州电网有限责任公司 | A kind of portable high-pressure cable connector local discharge detection device and method |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121219 |