CN201359876Y - High tension cable with lightning-protection function - Google Patents
High tension cable with lightning-protection function Download PDFInfo
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- CN201359876Y CN201359876Y CNU2009200519037U CN200920051903U CN201359876Y CN 201359876 Y CN201359876 Y CN 201359876Y CN U2009200519037 U CNU2009200519037 U CN U2009200519037U CN 200920051903 U CN200920051903 U CN 200920051903U CN 201359876 Y CN201359876 Y CN 201359876Y
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Abstract
The utility model relates to a high tension cable with lightning-protection function, which is characterized by the inclusion of a plastic internal stay core, an electric conductor twisting layer, a crosslinked polyethylene insulating layer and a weathering polythene sheathing layer, wherein the electric conductor twisting layer is wrapped around the plastic internal stay core; the crosslinked polyethylene insulating layer is wrapped around the surface of the electric conductor twisting layer; and the weathering polythene sheathing layer is wrapped around the surface of the crosslinked polyethylene insulating layer. The utility model has the characteristics of scientific structural design, lightning protection, good lightning-protection effect, weather resistance and excellent anticorrosion performance, and can be widely applied to various severe environmental conditions.
Description
Technical field
The utility model relates to a kind of construction of cable.
Background technology
At present, common cable mostly is to be made of conductive cores, insulating barrier and restrictive coating.This class cable is used for the field or sets up in the open when using, and the accident that occurs being struck by lightning through regular meeting takes place.Particularly along with high-rise is flourish, the application of lightening protection installation is paid attention to by people more and more, and the application of lightening protection installation, and more and more higher to the demand cry of the cable that can take shelter from the thunder, lightning-protective cable arises at the historic moment thus.The supporting application of lightning-protective cable and lightening protection installation can give high-rise good lightning-arrest function, makes building exempt from thunderbolt and remains intact, thereby play the safety of protecting people's lives and properties.
The utility model content
The purpose of this utility model is to provide a kind of scientific structure design, lightning protection, the lightning-arrest high pressure lightning-protective cable that effect is good, weather-proof, antiseptic property is good.
The technical solution of the utility model is achieved in that
A kind of high pressure lightning-protective cable, its characteristics are to comprise plastics inner support core, electric conductor stranded layer, crosslinked polyetylene insulated layer and weather-resistance polyethylene restrictive coating, wherein the electric conductor stranded layer is coated on the plastics inner support core, described crosslinked polyetylene insulated layer is coated on the surface of electric conductor stranded layer, and described weather-resistance polyethylene restrictive coating is coated on the surface of crosslinked polyetylene insulated layer.
In order to ensure the stranded quality of electric conductor stranded layer, obtaining preferable lightning protection, lightning-arrest performance, the rounded structure in cross section of above-mentioned plastics inner support core, its diameter of section is about 1: 2.48 with the diameter of section ratio of cable.
In order to guarantee that lightning-protective cable can bear high moment thunderbolt voltage when moving, the thickness of above-mentioned crosslinked polyetylene insulated layer is 1: 7.2 with the diameter of section ratio of cable, and its degree of eccentricity should be controlled at the scope less than 8%.
Even in order to guarantee crosslinked polyetylene insulated laminar surface electric field further, prevent electric field distortion, avoid the appearance of crosslinked polyetylene insulated layer to produce partial discharge, to improve the cable insulation withstand voltage level, also be provided with the insulation shielding semi-conductive layer between above-mentioned crosslinked polyetylene insulated layer and the weather-resistance polyethylene restrictive coating, this insulation shielding semi-conductive layer is by nylon semi-conductive tape overlapping wrapped formation on crosslinked polyetylene insulated layer, and simultaneously, the diameter of section of its thickness and cable was than about 1: 180.
The utility model is owing to adopt the high pressure lightning-protective cable structure that is made of plastics inner support core, electric conductor stranded layer, crosslinked polyetylene insulated layer and weather-resistance polyethylene restrictive coating, make the utility model by the cable core of cable being made plastics inner support core, electric conductor is stranded on the plastics inner support core, the effective cross-section of cable conductor is significantly reduced, can eliminate the kelvin effect when moment, huge thunder-strike current was by cable conductor; Adopt simultaneously on the surface of crosslinked polyetylene insulated layer coated with conductive body layer, can make cable when operation, can bear high moment thunderbolt voltage, make cable accomplish outstanding lightning protection, lightning-arrest effect; Meanwhile, the weather-resistance polyethylene sheath of crosslinked polyetylene insulated layer can also make cable have premium properties such as environmental stress resistance, weather-proof, resistance to chemical attack and high insulation resistance.The utlity model has scientific structure design, lightning protection, the lightning-arrest characteristics that effect is good, weather-proof, antiseptic property is good can be used in various rigorous environment conditions widely.
Below in conjunction with accompanying drawing the utility model is further described:
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is a cross section structure schematic diagram of the present utility model.
Embodiment
As Fig. 1 and shown in Figure 2, a kind of high pressure lightning-protective cable described in the utility model, it comprises plastics inner support core 1, electric conductor stranded layer 2, crosslinked polyetylene insulated layer 3 and weather-resistance polyethylene restrictive coating 4, wherein electric conductor stranded layer 2 is coated on the plastics inner support core 1, described crosslinked polyetylene insulated layer 3 is coated on the surface of electric conductor stranded layer 2, and described weather-resistance polyethylene restrictive coating 4 is coated on the surface of crosslinked polyetylene insulated layer 3.
Wherein, described plastics inner support core 1 significantly reduces the cable conductor effective cross-section, plays to eliminate the lightning-protective cable conductor dbus and cross the kelvin effect of moment during huge thunder-strike current; Simultaneously, also alleviated the cable Unit Weight to a great extent, made the laying installation of its modern high-rise building of being more convenient for; Meanwhile, also save the copper metal greatly, reduced the production cost of cable.In order to ensure the stranded quality of electric conductor stranded layer, to obtain preferable lightning protection, lightning-arrest performance, described plastics inner support core 1 generally becomes the rounded structure in cross section, and its diameter of section is 1: 2.48 with the diameter of section ratio of cable.For example: when needs system when a diameter of section is the cable of 36mm, the diameter of this plastics inner support core 1 then becomes 14.5 ± 0.1mm.The control of this ratio is very crucial, and it directly has influence on the lightning protection of cable, lightning-arrest effect, and the stranded quality and the presentation quality of electric conductor stranded layer.
Described electric conductor stranded layer 2 is by direct stranded formation the on plastics inner support core 1 of some anaerobic soft copper silks.Wherein, it is even that the copper wire in the electric conductor stranded layer 2 requires to arrange density, can not have defectives such as wire jumper projection, burr or mechanical damage, mainly is in order to guarantee the conductive surface rounding, to play the effect of uniform electric field.Simultaneously, in order to ensure effective conductive cross-sectional area of electric conductor stranded layer 2, the thickness of this electric conductor stranded layer 2 is 1: 26.67 with the diameter of section of cable ratio.For example: when the diameter of section of cable was 36mm, the thickness of electric conductor stranded layer 2 then became 1.35 ± 0.01mm, and this thickness generally is meant the diameter of section of every copper wire, needed approximately to carry out stranded formation with 35; So just can make cable obtain 50mm accordingly
2About the conductor net sectional area.In addition,, in the course of processing, require copper wire unanimity continuously, can not have defectives such as any drawing-down, broken string or welding in order to guarantee cable conductor good electrical conductivity and tensile property.
In order to guarantee that cable can bear high moment thunderbolt voltage when moving, the structure and the technology of described crosslinked polyetylene insulated layer 3 are key problems, must select the higher crosslinked polyethylene insulation material of ultra-clean degree and disruptive field intensity for use, adopt advanced in performance, the extruder that accuracy of temperature control is high extrudes this layer, and by advanced sulfuration process processing, make this crosslinked polyetylene insulated layer 3 obtain full cross-linked (degree of cross linking 〉=90%), thereby give outstanding mechanical performance of insulating barrier (creep resistant) and chemical-resistance, especially greatly improved the cable heat resistance, production process must guarantee that cross linked insulation is clean and intact; Simultaneously, the diameter of section ratio of the thickness of crosslinked polyetylene insulated layer 3 and cable (for example: when cross-section of cable diameter is 36mm must be controlled at 1: 7.2, the thickness of this insulating barrier then is about 5.0mm), its degree of eccentricity should be controlled at the scope less than 8%, to guarantee the insulated electro performance.
For electric conductor stranded layer 2 surface fields of guaranteeing cable further even, prevent electric field distortion, avoid table generation partial discharge in the insulating barrier, as Fig. 1 and shown in Figure 2, also be provided with conductor screen semi-conductive layer 5 between described electric conductor stranded layer 2 and the crosslinked polyetylene insulated layer 3, this conductor screen semi-conductive layer 5 is by nylon semi-conductive tape overlapping wrapped formation on electric conductor stranded layer 2, its thickness is 1: 180 (for example: when cross-section of cable diameter was 36mm, the thickness of this conductor screen semi-conductive layer then was about 0.2mm) with the diameter of section ratio of cable; Simultaneously, the Duplication of nylon semi-conductive tape should many 20%, and require the nylon semi-conductive tape wrapped smooth smooth, can not there be the bottom pour ladle defective, guarantee the even of cable conductor surface field further to reach, prevent electric field distortion, avoid table generation partial discharge in the insulating barrier, thereby improve the cable insulation withstand voltage level.Meanwhile, in process of production, remain the cleaning on these conductor screen semi-conductive layer 5 surfaces and intact, and free from dust is polluted and is scratched defective.
For crosslinked polyetylene insulated layer 3 surface field of guaranteeing cable further even, prevent electric field distortion, avoid these crosslinked polyetylene insulated layer 3 appearances to produce partial discharge, Fig. 1 and shown in Figure 2 and for example, also be provided with insulation shielding semi-conductive layer 6 between described crosslinked polyetylene insulated layer 3 and the weather-resistance polyethylene restrictive coating 4, this insulation shielding semi-conductive layer 6 is by nylon semi-conductive tape overlapping wrapped formation on crosslinked polyetylene insulated layer 3, its thickness is about 1: 180 (for example: when cross-section of cable diameter was 36mm, the thickness of this insulation shielding semi-conductive layer then was about 0.2mm) with the diameter of section ratio of cable; Simultaneously, the Duplication of nylon semi-conductive tape when wrapped should many 20%; And require half conduction band wrapped smooth smooth, can not there be the bottom pour ladle defective, to accomplish guaranteeing that further crosslinked polyetylene insulated layer 3 surface field of cable are even, prevent electric field distortion, avoid crosslinked polyetylene insulated layer 3 appearance to produce partial discharge, constitute perfect shielding construction with conductor screen semi-conductive layer 5, thereby improve the cable insulation withstand voltage level.Meanwhile, in process of production, also will remain the cleaning on insulation shielding semi-conductive layer 6 surfaces and intact, and free from dust is polluted and is scratched defective.
Although cable has been had the insulation screen structure, but because insulation screen is a semiconductive material, resistivity is still higher relatively, leakage current during conducting cable operation well in the insulator and charging current and the rapid induced electromotive force that reduces, therefore as Fig. 1 and shown in Figure 2, between insulation shielding semi-conductive layer 6 and weather-resistance polyethylene restrictive coating 4, also be provided with metal screen layer 7, this metal screen layer 7 (generally will adopt the higher metal tape of conductance, so be to use anaerobic soft copper band under the situation mostly by metal tape.) overlapping wrapped formation on insulation shielding semi-conductive layer 6, its thickness is about 1: 300 with the diameter of section ratio of cable, thereby makes the metal screen layer 7 and the insulation screen of front constitute well behaved shielding construction.
Again in order further to eliminate the sharp edge burr of metal screen layer 7, even metal screen layer electric field, avoid weather-resistance polyethylene restrictive coating 4 voltage breakdowns, Fig. 1 and shown in Figure 2 and for example, also be provided with semi-conductive layer 8 between described metal screen layer 7 and the weather-resistance polyethylene restrictive coating 4, this semi-conductive layer 8 is by nylon semi-conductive tape overlapping wrapped formation on metal screen layer 7, and its thickness is 1: 180 with the diameter of section ratio of cable, Duplication many 20%.Simultaneously, the wrapped of nylon semi-conductive tape also plays the effect that protection exempts from scratch to metal screen layer 7.
For lightning-protective cable can be suitable in the various rigorous environment conditions; the diameter of section ratio that the thickness of described weather-resistance polyethylene restrictive coating 4 is made with cable is 1: 12, so that lightning-protective cable has premium properties such as block water, environmental stress resistance, weather-proof, resistance to chemical attack, high insulation resistance, mechanical strength height and protective value are good.And, generally select for use weather resistant black LLDPE as the external sheath layer manufacturing materials.
After lightning-protective cable of the present utility model and relevant lightning protection, lightening protection installation were installed and laid, lightning-protective cable can give skyscraper good lightning-arrest function, can bear huge moment thunder-strike current and voltage and not puncturing, and made building exempt from thunderbolt and remained intact.
Claims (9)
1, a kind of high pressure lightning-protective cable, it is characterized in that comprising plastics inner support core (1), electric conductor stranded layer (2), crosslinked polyetylene insulated layer (3) and weather-resistance polyethylene restrictive coating (4), wherein electric conductor stranded layer (2) is coated on the plastics inner support core (1), described crosslinked polyetylene insulated layer (3) is coated on the surface of electric conductor stranded layer (2), and described weather-resistance polyethylene restrictive coating (4) is coated on the surface of crosslinked polyetylene insulated layer (3).
2, according to the described high pressure lightning-protective cable of claim 1, it is characterized in that the rounded structure in cross section of above-mentioned plastics inner support core (1), its diameter of section is 1: 2.48 with the diameter of section ratio of cable.
3, according to the described high pressure lightning-protective cable of claim 1, it is characterized in that above-mentioned electric conductor stranded layer (2) for directly going up stranded formation at plastics inner support core (1) by some anaerobic soft copper silks, its thickness is 1: 26.67 with the diameter of section ratio of cable.
4, according to the described high pressure lightning-protective cable of claim 1, the thickness that it is characterized in that above-mentioned crosslinked polyetylene insulated layer (3) is 1: 7.2 with the diameter of section ratio of cable, and its degree of eccentricity is controlled at the scope less than 8%.
5, according to the described high pressure lightning-protective cable of claim 1, it is characterized in that also being provided with conductor screen semi-conductive layer (5) between above-mentioned electric conductor stranded layer (2) and the crosslinked polyetylene insulated layer (3), this conductor screen semi-conductive layer (5) is gone up overlapping wrapped formation by the nylon semi-conductive tape at electric conductor stranded layer (2), and its thickness is 1: 180 with the diameter of section ratio of cable.
6, according to the described high pressure lightning-protective cable of claim 1, it is characterized in that also being provided with insulation shielding semi-conductive layer (6) between above-mentioned crosslinked polyetylene insulated layer (3) and the weather-resistance polyethylene restrictive coating (4), this insulation shielding semi-conductive layer (6) is gone up overlapping wrapped formation by the nylon semi-conductive tape at crosslinked polyetylene insulated layer (3), and its thickness is 1: 180 with the diameter of section ratio of cable.
7, according to claim 1 or 6 described high pressure lightning-protective cables, it is characterized in that also being provided with metal screen layer (7) between above-mentioned insulation shielding semi-conductive layer (6) and the weather-resistance polyethylene restrictive coating (4), this metal screen layer (7) is gone up overlapping wrapped formation by metal tape at insulation shielding semi-conductive layer (6), and its thickness is 1: 300 with the diameter of section ratio of cable.
8, according to the described high pressure lightning-protective cable of claim 7, it is characterized in that also being provided with semi-conductive layer (8) between above-mentioned metal screen layer (7) and the weather-resistance polyethylene restrictive coating (4), this semi-conductive layer (8) is gone up overlapping wrapped formation by the nylon semi-conductive tape at metal screen layer (7), and its thickness is 1: 180 with the diameter of section ratio of cable.
9, according to the described high pressure lightning-protective cable of claim 1, the thickness that it is characterized in that above-mentioned weather-resistance polyethylene restrictive coating (4) is 1: 12 with the diameter of section ratio of cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200519037U CN201359876Y (en) | 2009-03-02 | 2009-03-02 | High tension cable with lightning-protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200519037U CN201359876Y (en) | 2009-03-02 | 2009-03-02 | High tension cable with lightning-protection function |
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| Publication Number | Publication Date |
|---|---|
| CN201359876Y true CN201359876Y (en) | 2009-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200519037U Expired - Fee Related CN201359876Y (en) | 2009-03-02 | 2009-03-02 | High tension cable with lightning-protection function |
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| CN (1) | CN201359876Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110911032A (en) * | 2019-10-14 | 2020-03-24 | 中国人民解放军总参谋部第六十研究所 | Lightning protection line for unmanned aerial vehicle |
-
2009
- 2009-03-02 CN CNU2009200519037U patent/CN201359876Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110911032A (en) * | 2019-10-14 | 2020-03-24 | 中国人民解放军总参谋部第六十研究所 | Lightning protection line for unmanned aerial vehicle |
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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: 20091209 Termination date: 20120302 |