CN203826090U - Environmental-friendly medium-voltage fire-resistant power cable - Google Patents
Environmental-friendly medium-voltage fire-resistant power cable Download PDFInfo
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- CN203826090U CN203826090U CN201420091692.0U CN201420091692U CN203826090U CN 203826090 U CN203826090 U CN 203826090U CN 201420091692 U CN201420091692 U CN 201420091692U CN 203826090 U CN203826090 U CN 203826090U
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Abstract
The utility model discloses an environmental-friendly medium-voltage fire-resistant power cable, which comprises a plurality of conductors. Each conductor comprises a lead located in the middle part; the lead is coated with a conductor semi-conductive shielding layer; the conductor semi-conductive shielding layer is coated with an insulation layer; the insulation layer is coated with an insulation semi-conductive shielding layer; the insulation semi-conductive shielding layer is coated with a metal shielding layer; a plurality of conductors form a cable core; the cable core is wrapped with a ceramic fiber tape heat insulation layer; the ceramic fiber tape heat insulation layer is coated and extruded with a polyetheretherketone fire protection layer; the polyetheretherketone fire protection layer is coated with a sheath layer; and the sheath layer is made by adopting low-smoke halogen-free flame-retardant high-strength wear-resistance elastic body. The environmental-friendly medium-voltage fire-resistant power cable provided by the utility model is high in current carrying, excellent in fire-resistant performance, and is suitable for being used in a medium-voltage power distribution system environment for a long time.
Description
Technical field
The utility model relates to cable technology field, relates in particular in a kind of environmental protection and presses fireproof power cable.
Background technology
Medium-pressure power cable is mainly used in skyscraper, the intermediate distribution system in the places such as subway, power plant, nuclear power station, tunnel, along with the raising of people's awareness of safety and environmental consciousness, fail safe and the feature of environmental protection to cable under Fire Conditions are had higher requirement.
The basic ideas that this area strengthens cable fire performance are to select the material (such as magnetization silicon rubber) with very high thermal resistivity as thermal insulation layer, and increase thermal insulation layer thickness, play temperature insulating by the thermal resistance mode that improves thermal insulation layer.But due to the special electric property of midium voltage cable and structural requirement, on conductor, the structural shape of wrapped fire-resistant isinglass belt cannot meet the performance requirement of midium voltage cable.
Utility model content
In order to solve the technical problem existing in background technology, the utility model proposes in a kind of environmental protection and press fireproof power cable, its high current-carrying, fire resistance excellence, be suitable under intermediate distribution system environment, using for a long time.
In a kind of environmental protection the utility model proposes, press fireproof power cable, comprise multiple conductors; Each conductor comprises the wire that is positioned at middle part, at the outside coating conductor semiconductive shielding layer of wire, and the outside coated insulation layer of conductor semiconductive shielding layer, the outside coated insulation semiconductive shielding layer of insulating barrier, at the outside clad metal screen of insulation semiconductive shielding layer; Multiple conductors form cable core, at the outside wrapped ceramic fibre strip thermal insulation layer of cable core, the outside coated polyether-ether-ketone fireprotection layer that extrudes of ceramic fibre strip thermal insulation layer, the outside coated restrictive coating of polyether-ether-ketone fireprotection layer, restrictive coating adopts low-smoke non-halogen flame-retardant high-strength abrasion-proof elastomer to make.
Preferably, described wire adopts many stranded the forming of tinned copper wire.
Preferably, described insulating barrier adopts crosslinked polyethylene to make.
Preferably, described metal screen layer adopts wrapped the making of soft copper band.
Preferably, described conductor semiconductive shielding layer, described insulating barrier and described insulation semiconductive shielding layer are co-extruded in described wire outside.
In the utility model, restrictive coating three parts that the flame retardant coating of cable is made up of the wrapped thermal insulation layer of ceramic fibre strip, polyether-ether-ketone fireprotection layer and low-smoke non-halogen flame-retardant high-strength abrasion-proof elastomer form: the wrapped thermal insulation layer forming of ceramic fibre strip, compared with the mica tape using with routine, light wear-resistant, high temperature insulation characteristic are good, and conductive coefficient is less; Polyether-ether-ketone extrudes fireprotection layer, has high temperature resistant, corrosion-resistant, the premium properties such as fire resistance is good, LSZH; The restrictive coating that adopts low-smoke non-halogen flame-retardant high-strength abrasion-proof elastomer composition, the tensile wear-resistant that can improve the restrictive coating of cable meets again fire-resistant needs.Therefore, the flame retardant coating of cable has improved the fire resistance of cable greatly, and weight and the external diameter of cable also reduce greatly simultaneously.
Wire adopts that tinned copper wire is stranded forms, and when having ensured the conductive capability of cable, has solved the oxidizable problem of oxygen-free cupreous, has improved the current capacity of cable, and, the coating conductor semiconductive shielding layer successively in wire outside, insulating barrier, insulation semiconductive shielding layer and metal screen layer, conductor semiconductive shielding layer and insulation semiconductive shielding layer are set respectively between wire and insulating barrier and insulating barrier and metal screen layer, object is the gap preventing between metal and insulating material, ensure metal equipotential and with insulating material good contact, thereby avoid metal and insulating material surface to produce partial discharge, and shield semiconductors layer uniform electric field distributes and suppresses the generation of metal and insulating material surface corona, further ensure the stable of the high current-carrying of cable.In addition, metal screen layer adopts soft copper band wrapped making, and it for each conductor provides separated-shielding, prevents between conductor the Electromagnetic Interference with cable outside together with conductor semiconductive shielding layer and insulation semiconductive shielding layer.
Brief description of the drawings
Fig. 1 is the structural representation of pressing fireproof power cable in a kind of environmental protection the utility model proposes.
Embodiment
As shown in Figure 1, Fig. 1 is the structural representation of pressing fireproof power cable in a kind of environmental protection the utility model proposes.
With reference to Fig. 1, in a kind of environmental protection the utility model proposes, press fireproof power cable, comprise three conductors 1, conductor 1 comprises the wire 11 that is positioned at middle part, wire 11 is by many stranded the forming of tinned copper wire.The outside coating conductor semiconductive shielding layer 12 of wire 11, the outside coated crosslinked polyetylene insulated layer 13 of conductor semiconductive shielding layer 12, crosslinked polyetylene insulated layer 13 outside coated insulation semiconductive shielding layer 14.Conductor semiconductive shielding layer 12, insulating barrier 13 and insulation semiconductive shielding layer 14 are co-extruded in wire 11 outsides.At the outside clad metal screen 15 of insulation semiconductive shielding layer 14, metal screen layer 15 adopts the wrapped form of soft copper band.
Three conductors 1 are twisted into cable core, at the outside wrapped ceramic fibre strip thermal insulation layer 2 of cable core, thermal insulation layer 2 outsides extrude polyether-ether-ketone fireprotection layer 3, the outside coated restrictive coating 4 of polyether-ether-ketone fireprotection layer 3, and restrictive coating 4 adopts low-smoke non-halogen flame-retardant high-strength abrasion-proof elastomer to make.
In such scheme, the restrictive coating 4 that the flame retardant coating of cable is made up of the wrapped thermal insulation layer 2 of ceramic fibre strip, polyether-ether-ketone fireprotection layer 3 and low-smoke non-halogen flame-retardant high-strength abrasion-proof elastomer forms: the wrapped thermal insulation layer forming 2 of ceramic fibre strip, compared with the mica tape using with routine, light wear-resistant, high temperature insulation characteristic are good, and conductive coefficient is less; Polyether-ether-ketone extrudes fireprotection layer 3, has high temperature resistant, corrosion-resistant, the premium properties such as fire resistance is good, LSZH; The restrictive coating 4 that adopts low-smoke non-halogen flame-retardant high-strength abrasion-proof elastomer composition, the tensile wear-resistant that can improve the restrictive coating of cable meets again fire-resistant needs.Therefore, three layers of fire-resistant layer structure have improved the fire resistance of midium voltage cable greatly, and weight and the external diameter of cable also reduce greatly simultaneously.
Wire 11 adopts that tinned copper wire is stranded to be formed, and when having ensured the conductive capability of cable, has solved the oxidizable problem of oxygen-free cupreous, has improved the current capacity of cable; And, in wire 11 outsides successively coating conductor semiconductive shielding layer 12, insulating barrier 13, insulation semiconductive shielding layer 14 and metal screen layer 15, conductor semiconductive shielding layer 12 and insulation semiconductive shielding layer 14 are set respectively between wire 11 and insulating barrier 13 and insulating barrier 13 and metal screen layer 15, object is the gap preventing between metal and insulating material, ensure metal equipotential and with insulating material good contact, thereby avoid metal and insulating material surface generation partial discharge; And shield semiconductors layer uniform electric field distributes and suppress the generation of metal and insulating material surface corona, further ensure the stable of the high current-carrying of cable.In addition, metal screen layer 16 adopts that soft copper band is wrapped to be made, its with conductor semiconductive shielding layer 12 together with insulation semiconductive shielding layer 14 for each conductor 1 provides separated-shielding, prevent between conductor 1 and the Electromagnetic Interference of cable outside.
Low-smoke non-halogen flame-retardant high-strength abrasion-proof elastomer, as the protective to inner cable core, is made by the elastomeric material that adopts above-mentioned raw materials component, and effectively fire protection flame retarding, extends the useful life in distribution system; Wherein, the interpolation of nano-calcium carbonate and carbon fiber, can promote anti-wear performance.Therefore, the elastomeric restrictive coating 4 of this low-smoke non-halogen flame-retardant high-strength abrasion-proof has mechanical performance excellence, high temperature resistant, fire resistance is good, LSZH when burning.
According to pressing fireproof power cable in the environmental protection of the present embodiment, after testing, electric pressure is 0.6/1kV; Withstand voltage test is 3.5/5kV/min; Cable is under flame condition after 90min, and cable internal temperature is 300 DEG C of left and right, and at this temperature, cable can meet fire-resistant needs and can ensure the impact of current-carrying capacity of cable again less; Overload capacity can reach the more than 100 times of normal ampacity; Fire retardant performance is good; Safety, environmental protection, life-span are long, and burning does not produce smog, halogen and toxic gas.
The above; it is only preferably embodiment of the utility model; but protection range of the present utility model is not limited to this; any be familiar with those skilled in the art the utility model disclose technical scope in; be equal to replacement or changed according to the technical solution of the utility model and utility model design thereof, within all should being encompassed in protection range of the present utility model.
Claims (5)
1. in environmental protection, press a fireproof power cable, it is characterized in that, comprise multiple conductors (1); Each conductor (1) comprises the wire (11) that is positioned at middle part, at the outside coating conductor semiconductive shielding layer of wire (11) (12), the outside coated insulation layer of conductor semiconductive shielding layer (12) (13), the outside coated insulation semiconductive shielding layer of insulating barrier (13) (14), at insulation semiconductive shielding layer (14) outside clad metal screens (15); Multiple conductors (1) composition cable core, at the outside wrapped ceramic fibre strip thermal insulation layer of cable core (2), ceramic fibre strip thermal insulation layer (2) outside extrudes polyether-ether-ketone fireprotection layer (3), the outside coated restrictive coating (4) of polyether-ether-ketone fireprotection layer (3), restrictive coating (4) adopts low-smoke non-halogen flame-retardant high-strength abrasion-proof elastomer to make.
2. in environmental protection according to claim 1, press fireproof power cable, it is characterized in that, described wire (11) adopts many stranded the forming of tinned copper wire.
3. in environmental protection according to claim 1, press fireproof power cable, it is characterized in that, described insulating barrier (13) adopts crosslinked polyethylene to make.
4. in environmental protection according to claim 1, press fireproof power cable, it is characterized in that, described metal screen layer (15) adopts wrapped the making of soft copper band.
5. according to pressing fireproof power cable in the environmental protection described in any one in claim 1-4, it is characterized in that, described conductor semiconductive shielding layer (12), described insulating barrier (13) and described insulation semiconductive shielding layer (14) are co-extruded in described wire (11) outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420091692.0U CN203826090U (en) | 2014-02-28 | 2014-02-28 | Environmental-friendly medium-voltage fire-resistant power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420091692.0U CN203826090U (en) | 2014-02-28 | 2014-02-28 | Environmental-friendly medium-voltage fire-resistant power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203826090U true CN203826090U (en) | 2014-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420091692.0U Expired - Fee Related CN203826090U (en) | 2014-02-28 | 2014-02-28 | Environmental-friendly medium-voltage fire-resistant power cable |
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| Country | Link |
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| CN (1) | CN203826090U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103854782A (en) * | 2014-02-28 | 2014-06-11 | 安徽华联电缆集团有限公司 | Environment-friendly medium-voltage fire-resistant power cable |
-
2014
- 2014-02-28 CN CN201420091692.0U patent/CN203826090U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103854782A (en) * | 2014-02-28 | 2014-06-11 | 安徽华联电缆集团有限公司 | Environment-friendly medium-voltage fire-resistant power cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140910 Termination date: 20150228 |
|
| EXPY | Termination of patent right or utility model |