CN105280299A - Novel reinforced extra-high-voltage power cable - Google Patents
Novel reinforced extra-high-voltage power cable Download PDFInfo
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- CN105280299A CN105280299A CN201510709896.5A CN201510709896A CN105280299A CN 105280299 A CN105280299 A CN 105280299A CN 201510709896 A CN201510709896 A CN 201510709896A CN 105280299 A CN105280299 A CN 105280299A
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Abstract
The invention discloses a novel reinforced extra-high-voltage power cable. The power cable comprises a conductor arranged in the center of the cable; the conductor is wrapped with an inner semi-conducting shielding layer, a crosslinked polyethylene insulating layer, and an outer semi-conducting shielding layer in sequence; the outer semi-conducting shielding layer is extruded with a semi-conducting buffering layer, a corrugated aluminum sheath, and a non-metal sheath; the outermost layer of the cable is extruded with a graphite coating layer; five circular reinforced cores are arranged in the conductor along the inner edge of the conductor; and a quinquelateral arc-shaped reinforced core is arranged among the five circular reinforced cores. The semi-conducting buffering layer provided by the invention adopts an extruded semi-conducting silicone rubber structure so as to reduce sealed and stationary air amount in the buffering layer and to ensure the compactness of the cable structure, so that the carrying capacity of the cable can be effectively improved.
Description
Technical field
The invention belongs to power cable field, be specifically related to a kind of novel reinforced EHV XLPE power cable.
Background technology
At present, between the metallic sheath and cable conductor of superhigh pressure single-core cable, all resilient coating is had.Resilient coating has semiconducting character, effectively can cushion, weaken electric field strength, and effectively cushions cable insulation and metal level, prevents Damage to insulation.Current semi-conductive buffer layer adopts partly leads that buffer strip is wrapped to be formed, and there is important impact in the semiconducting character of semi-conductive tape and the gap between metallic sheath and semiconductive twining package tape for the Characteristics of Partial Discharge of cable.Thermal resistivity depends on the aeriferous state of institute and quantity in semiconductive twining package tape fiber to a great extent.When air does not flow, the air kept in fiber is more, the thermal resistivity of material is larger, cable current capacity is caused to decline, so suitably optimize semi-conductive buffer Rotating fields, reduce thickness and air gap total content, the effect reducing semi-conductive buffer layer thermal resistivity, strengthen the heat radiation of cable can be played; Thus minimizing affects cable current capacity.
In addition, be all provided with strengthening core in a lot of cable now, but be all the circular strengthening core adopted, and be all single, make the conductor in cable still be easy to fracture, make the life-span of cable short.
Summary of the invention
The object of this invention is to provide a kind of novel reinforced EHV XLPE power cable, simple, the easy processing of this construction of cable, superhigh current carrying amount, Stability Analysis of Structures, not easy fracture, long service life.
The novel reinforced EHV XLPE power cable of one of the present invention, comprise the conductor being arranged on cable center, at conductor outer coated inner semiconductor layer, crosslinked polyetylene insulated layer, out semiconductor layer successively, outside out semiconductor layer, extrude semi-conductive buffer layer, corrugated aluminum sheath, non metallic sheath; Coated with graphite layer is extruded outside the non metallic sheath of cable; In conductor, be first provided with 5 circular strengthening cores along conductor inside edge, then between 5 circular strengthening cores, be provided with five limit arc strengthening cores.
Further improvement, described semi-conductive buffer layer adopts semi-conductive silicone rubber material to extrude and forms.
Further improvement, the ratio of the thickness between described inner semiconductor layer, crosslinked polyetylene insulated layer, out semiconductor layer is 2:1:2, and wherein the thickness of inner semiconductor layer is 2-4mm.
Further improvement, between described semi-conductive buffer layer, corrugated aluminum sheath, non metallic sheath, the ratio of thickness is 1:2:3, and wherein the thickness of semi-conductive buffer layer is 1.5-3mm.
Beneficial effect of the present invention is:
Semi-conductive buffer layer adopts semi-conductive silicone rubber material to extrude and forms by the present invention, semi-conductive silicone rubber material has higher elasticity, and the serviceability temperature scope of application is wide, in temperature range, all there is higher use elasticity from-40 DEG C to 180 DEG C, be conducive to the critical piece that can not injure cable when metallic sheath receives External Force Acting, i.e. insulated wire cores, the structure extruded purchased by cable, structure is closely knit, avoid the existence of air gap in structure, thus reduction semi-conductive buffer layer thermal resistivity can be played, reduce and cable current capacity is affected; Extrude coated with graphite layer outside the nonmetal oversheath of cable, not only effectively improve the conductivity of cable, play antifriction function simultaneously, improve the resistance to wear of cable; In addition, change the structure of existing strengthening core, the present invention adopts the pattern of 5+1, makes the epistasis that adds of cable improve 5 times than originally, makes cable more not frangibility, thus make the longer service life of cable, just artificial at last destruction, conductor also not easy fracture; Each layer thickness adoption rate formula design of cable, makes the rounding property of cable be improved.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
As shown in Figure 1, the novel reinforced EHV XLPE power cable of one of the present invention, first conductor 1 is arranged on the center of cable, in conductor 1, is first provided with 5 circular strengthening cores 2 along conductor inside edge, then between 5 circular strengthening cores 2, is provided with five limit arc strengthening cores 3; Change the structure of existing strengthening core, adopt the pattern of 5+1, make the epistasis that adds of cable improve 5 times than originally, make cable more not frangibility, thus make the longer service life of cable, with regard to destruction artificial at last, conductor also not easy fracture; Then, at conductor 1 outer coated inner semiconductor layer 4, crosslinked polyetylene insulated layer 5, out semiconductor layer 6 successively, then outside out semiconductor layer 6, semi-conductive buffer layer 7, corrugated aluminum sheath 8, non metallic sheath 9 is extruded; Extrude coated with graphite layer 10 at the outermost layer of cable, not only effectively improve the conductivity of cable, play antifriction function simultaneously, improve the resistance to wear of cable.
The semi-conductive buffer layer of this cable adopts semi-conductive silicone rubber material to extrude and forms, semi-conductive silicone rubber material has higher elasticity, and the serviceability temperature scope of application is wide, in temperature range, all there is higher use elasticity from-40 DEG C to 180 DEG C, be conducive to the critical piece that can not injure cable when metallic sheath receives External Force Acting, i.e. insulated wire cores, the structure extruded purchased by cable, structure is closely knit, avoid the existence of air gap in structure, thus reduction semi-conductive buffer layer thermal resistivity can be played, reduce and cable current capacity is affected.
The ratio of the thickness between described inner semiconductor layer 4, crosslinked polyetylene insulated layer 5, out semiconductor layer 6 is 2:1:2, wherein the thickness of inner semiconductor layer is 2-4mm, the thickness of crosslinked polyetylene insulated layer 5 is 1-2mm, and the thickness of out semiconductor layer 6 is 2-4mm.
Between described semi-conductive buffer layer, corrugated aluminum sheath, non metallic sheath, the ratio of thickness is 1:2:3, and wherein the thickness of semi-conductive buffer layer is 1.5-3mm, and the thickness of corrugated aluminum sheath is 3-6mm, and the thickness of non metallic sheath is 4.5-9mm.
The invention provides a kind of version and implementation method of novel reinforced EHV XLPE power cable; the above is only preferred implementation method of the present invention; should be understood that; for those skilled in the art; under the premise without departing from the principles of the invention; can also make some improvement, these improvement also should be considered as protection scope of the present invention.
Claims (4)
1. a novel reinforced EHV XLPE power cable, it is characterized in that: comprise the conductor (1) being arranged on cable center, at conductor (1) coated inner semiconductor layer (4), crosslinked polyetylene insulated layer (5), out semiconductor layer (6) successively outward, outside out semiconductor layer (6), extrude semi-conductive buffer layer (7), corrugated aluminum sheath (8), non metallic sheath (9); Coated with graphite layer (10) is extruded outside the non metallic sheath (9) of cable; In conductor (1), be first provided with 5 circular strengthening cores (2) along conductor (1) inside edge, then between 5 circular strengthening cores (2), be provided with five limits arc strengthening core (3).
2. novel reinforced EHV XLPE power cable according to claim 1, is characterized in that: described semi-conductive buffer layer (7) adopts semi-conductive silicone rubber material to extrude coated forming.
3. novel reinforced EHV XLPE power cable according to claim 1, is characterized in that: the ratio of the thickness between described inner semiconductor layer (4), crosslinked polyetylene insulated layer (5), out semiconductor layer (6) is 2:1:2.
4. novel reinforced EHV XLPE power cable according to claim 1, is characterized in that: between described semi-conductive buffer layer (7), corrugated aluminum sheath (8), non metallic sheath (9), the ratio of thickness is 1:2:3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510709896.5A CN105280299A (en) | 2015-10-28 | 2015-10-28 | Novel reinforced extra-high-voltage power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510709896.5A CN105280299A (en) | 2015-10-28 | 2015-10-28 | Novel reinforced extra-high-voltage power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105280299A true CN105280299A (en) | 2016-01-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510709896.5A Pending CN105280299A (en) | 2015-10-28 | 2015-10-28 | Novel reinforced extra-high-voltage power cable |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6402993B1 (en) * | 2000-10-11 | 2002-06-11 | General Cable Technologies Corporation | Low adhesion semi-conductive electrical shields |
| CN201994106U (en) * | 2010-12-09 | 2011-09-28 | 安徽安邦控制系统有限公司 | Rubber flexible cable |
| CN102623100A (en) * | 2012-04-28 | 2012-08-01 | 广州南洋电缆有限公司 | Crosslinked polyethylene insulated corrugated steel sheath power cable |
| CN205069210U (en) * | 2015-10-28 | 2016-03-02 | 无锡市长城电线电缆有限公司 | Novel super high voltage power cable of strenghthened type |
-
2015
- 2015-10-28 CN CN201510709896.5A patent/CN105280299A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6402993B1 (en) * | 2000-10-11 | 2002-06-11 | General Cable Technologies Corporation | Low adhesion semi-conductive electrical shields |
| CN201994106U (en) * | 2010-12-09 | 2011-09-28 | 安徽安邦控制系统有限公司 | Rubber flexible cable |
| CN102623100A (en) * | 2012-04-28 | 2012-08-01 | 广州南洋电缆有限公司 | Crosslinked polyethylene insulated corrugated steel sheath power cable |
| CN205069210U (en) * | 2015-10-28 | 2016-03-02 | 无锡市长城电线电缆有限公司 | Novel super high voltage power cable of strenghthened type |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160127 |
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| WD01 | Invention patent application deemed withdrawn after publication |