CN2498716Y - Lightning-proof electric cable - Google Patents
Lightning-proof electric cable Download PDFInfo
- Publication number
- CN2498716Y CN2498716Y CN 01245357 CN01245357U CN2498716Y CN 2498716 Y CN2498716 Y CN 2498716Y CN 01245357 CN01245357 CN 01245357 CN 01245357 U CN01245357 U CN 01245357U CN 2498716 Y CN2498716 Y CN 2498716Y
- Authority
- CN
- China
- Prior art keywords
- layer
- lightning
- outer jacket
- cable
- metal sheath
- 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 - Fee Related
Links
Abstract
Disclosed is a lightning-proof cable relating to the cable technical field. The utility model comprises a conducting layer, an insulating barrier and an external protective layer; multiple metallic protective layers are arranged between the insulating barrier and the external protective layer. The utility model can improve the impact tolerant voltage strength of the insulating barrier, performing the function of multilayer protection and good lightning-proof property; thereby the service-life of the cable can be prolonged.
Description
Technical field:
The utility model relates to the cable technology field.
Background technology:
Thunder and lightning is the phenomenon that the Nature often occurs.The many direct-burrieds of cable that generally adopt are underground at present, the place is gone in thunderbolt under the influence of external conditions such as landform, geology and building, current density is very big, under soil resistance rate condition with higher, produce very big voltage drop and the lightning strike spot potential rise is got very high, often make cable be subjected to the harm of direct lightning strike and non-direct thunder.Buried cable metal sheath current potential at ordinary times equals zero, if cable distance thunderbolt point is not far, then very big potential difference occurs between thunderbolt point and the close cable, cable becomes the target of thunderbolt arcing, the high temperature of arc spark, outer jacket is burnt out, after the metal sheath fusing, burn out heart yearn, if cable and thunderbolt point are far away, the big density current direction cable of part is then arranged outside the thunder and lightning flashover distance, cause cable bad.General cable only has the layer of metal sheath, and the outer jacket of cable adopts this cable of insulated type material after thunderbolt, and lightning current can not get timely shunting, damages cable, causes very big loss even can endanger people's life.
At present, the lightning protection measures of circuit mainly is, installs additional on the line and leads the earthing device of letting out lightning current, and as earth connection, drain wire, extinguishing arc line, built on stilts lightning protection line, crossing current line etc., but these method effects are all undesirable, can not effectively prevent thunderbolt.
Technical scheme:
This is practical to provide a kind of above-mentioned defective that overcomes, the lightning retardant cable with anti-lightning strike performance, and it comprises conductor, insulating barrier, outer jacket, it is characterized in that, is provided with the multiple layer metal sheath between inner insulating layer and outer jacket.The multiple layer metal overcoat is to be provided with magnetic layer between inner insulating layer and external insulation layer, and the external insulation layer outside is provided with conductive layer, is provided with naked metal sheath between conductive layer and the outer jacket, and outer jacket is the semiconductive sheath.
The multiple layer metal sheath is to be provided with magnetic layer between inner insulating layer and external insulation layer, and the external insulation layer outside is provided with conductive layer, is provided with naked metal sheath between conductive layer and the outer jacket, and outer jacket is the semiconductive sheath.
External insulation layer adopts and extrudes the XLPE plastic insulating layer; Naked metal sheath is to adopt metallic steel wrapped; External sheath layer is a semi-conductive layer, adopts to contain carbon black and polyolefinic material.
The utility model is owing to adopted the multiple layer metal sheath; one can improve the shock-resistant voltage strength of insulating barrier; two can in time introduce the earth with lightning current, and play protective action layer by layer, again because outer jacket has the semiconductive performance; make on the whole line length of metal level and to form electric contact and ground connection everywhere; guaranteed the to be struck by lightning shunting of cable lightning current because of after lightning current evenly flows into sheath, and in time passes back into the earth; do not puncture so lightning does not take place, thereby the protection cable is not damaged.
Description of drawings:
Accompanying drawing is a structural representation of the present utility model:
1 is conductor, the 2nd among the figure, inner insulating layer, the 3rd, magnetic layer, the 4th, external insulation layer, the 5th, conductive layer, the 6th, naked metal sheath, the 7th, outer jacket.
Specific embodiments:
The utility model has conductor, interior external insulation layer, magnetic layer, conductive layer, naked metal sheath and outer jacket, is provided with the multiple layer metal sheath between inner insulating layer 2 and outer jacket 7.The multiple layer metal sheath is to be provided with magnetic layer 3 between inner insulating layer 2 and external insulation layer 4, inner insulating layer 2 adopts breakdown voltage resistant crosslinked polyethylene plastic, magnetic layer 3 adopts wrapped or extruded aluminium, external insulation layer 4, adopt the xLPE plastic insulation material to extrude, the outside of external insulation layer 4 is provided with conductive layer 5, conductive layer 5 adopts brass wrapped, be provided with naked metal sheath 6 between conductive layer 5 and the outer jacket 7, naked metal sheath 6 adopts metallic steel wrapped, outer jacket 7 is the semiconductive sheath, adopts carbon black and polyolefin material composite material to make.
Claims (3)
1, a kind of lightning retardant cable, it comprises conductor, insulating barrier, outer jacket, it is characterized in that, is provided with the multiple layer metal sheath between inner insulating layer and outer jacket.
2, lightning retardant cable according to claim 1, it is characterized in that said multiple layer metal sheath is to be provided with magnetic layer between inner insulating layer and external insulation layer, the external insulation layer outside is provided with conductive layer, be provided with naked metal sheath between conductive layer and the outer jacket, outer jacket is the semiconductive sheath.
3, lightning retardant cable according to claim 1 is characterized in that the magnetic layer employing is wrapped or extrudes the armouring magnetic layer; External insulation layer adopts and extrudes the XLPE plastic insulating layer; Naked metal sheath is to adopt metallic steel wrapped; External sheath layer is a semi-conductive layer, adopts to contain carbon black and polyolefinic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01245357 CN2498716Y (en) | 2001-08-14 | 2001-08-14 | Lightning-proof electric cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01245357 CN2498716Y (en) | 2001-08-14 | 2001-08-14 | Lightning-proof electric cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2498716Y true CN2498716Y (en) | 2002-07-03 |
Family
ID=33656624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01245357 Expired - Fee Related CN2498716Y (en) | 2001-08-14 | 2001-08-14 | Lightning-proof electric cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2498716Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103985440A (en) * | 2014-05-09 | 2014-08-13 | 广西南宁百兰斯科技开发有限公司 | Lightning-protection impedance type cable |
-
2001
- 2001-08-14 CN CN 01245357 patent/CN2498716Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103985440A (en) * | 2014-05-09 | 2014-08-13 | 广西南宁百兰斯科技开发有限公司 | Lightning-protection impedance type cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20020703 Termination date: 20090814 |