CN104112538A - Aluminum-alloy medium-voltage fireproof power cable - Google Patents
Aluminum-alloy medium-voltage fireproof power cable Download PDFInfo
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- CN104112538A CN104112538A CN201410324973.0A CN201410324973A CN104112538A CN 104112538 A CN104112538 A CN 104112538A CN 201410324973 A CN201410324973 A CN 201410324973A CN 104112538 A CN104112538 A CN 104112538A
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Abstract
The invention discloses an aluminum-alloy medium-voltage fireproof power cable which includes a plurality of wire cores. Each wire cored is formed by an aluminum alloy conductor, and an internal shielding layer, a silicon rubber wrapping tape layer, an external shielding layer and a crust layer, which externally wrap the aluminum alloy conductor. The wire cores are externally sleeved with a filling layer, a waterproof layer, and a heat insulation layer. The heat insulation layer is externally wrapped with a linkage armor layer. The waterproof layer is formed by close array and crosslinking of a plurality of round non-bibulous tapes and macromolecule bibulous wood pulp fiber. Each aluminum alloy conductor is formed through rightward twisting of a plurality of strands of aluminum alloy wires. An aluminum wire heating wire is arranged in each external shielding layer. The aluminum-alloy medium-voltage fireproof power cable ensures basic functions of normal power transmission and distribution and is excellent in mechanical, economic and safety performance; the cable is creep resistant, acid and alkali resistant and waterproof and fireproof; and the cable is widely applied to the field of power generation, metallurgy and chemical petroleum and the like.
Description
Technical field
The present invention relates to a kind of midium voltage cable, refer more particularly in a kind of aluminium alloy and press fireproof power cable.
Background technology
At present fire-resisting cable range of application is extensively, as: hospital, cinema, mall, subway, tunnel, railway, airport, station, large-scale Public Physical Education, public place of entertainment, large supermarket, hotel, skyscraper, military installations, nuclear power station, colliery, chemical industry, medicine, iron and steel, metallurgy, boats and ships, civilian etc.Because medium-pressure power cable moves under high voltage, its special electric property requires insulated wire cores to be comprised of conductor wire core, conductor screen, XLPE insulation and insulation shielding, metallic shield etc.Smooth rounding is wanted at interface between midium voltage cable insulation and conductor, has one deck to extrude semi-conductive layer, and the office of preventing is high-volume excessive, if by Mica tape at conductive surface, will cause cable local discharge amount to exceed standard, there is critical defect.So press in the mill fireproof power cable, can not take the mode of wrapped fire-resistant isinglass belt on conductor, can not take copper core copper sheath magnesium oxide insulated mode.Insulated wire cores can not arrange flame retardant coating, can only arrange outward at cable core, adopts the fireproof construction of thermal insulation layer, cooling layer and the combination of gear fire bed, finally realizes fire-resistant object.
Summary of the invention
In order to overcome the defect of above-mentioned prior art, the invention provides in a kind of aluminium alloy and press fireproof power cable, this cable has excellent machinery, economy, security performance, creep resistance, acid and alkali-resistance, fire-resistant waterproof.
Technical solution problem of the present invention adopts following technical scheme: in a kind of aluminium alloy, press fireproof power cable, comprise several cores, described core is by aluminium alloy conductor and the internal shield that is wrapped in successively from inside to outside aluminium alloy conductor outside, silicon rubber belting layer, outer shielding layer, skinning cortex forms, described core is set with watertight composition outward successively, thermal insulation layer, between described core and described watertight composition, be extruded with packed layer, described thermal insulation layer coated outside interlocking armour, described watertight composition is closely arranged and is formed by the non-water sucting belt cross-linked polymer of a plurality of circles water absorption wood pulp fibres, described aluminium alloy conductor is to be formed to right rotation is stranded by multiply aluminum-alloy wire, described outer shielding layer inside is provided with an aluminium wire heater wire.
Described core is three groups.
Described internal shield, outer shielding layer are semiconductive shielding layer.
Described skinning cortex material is crosslinked polyethylene.
Described packed layer material is fire-retardant asbestos cord.
Described thermal insulation layer is refractory ceramic fibre band.
Described lock armo layer is that 5000 series alloys band composite ceramics SiClx rubber annealing calenderings form.
Design feature of the present invention is:
Adopt the stranded structure of pressing of aluminum alloy materials, saved cost, improved the stability of current-carrying capacity of cable; Thermal insulation layer Ceramics fabric strip material, has also alleviated cable weight when having reduced the outside diameter of cable; Not short circuit of circuit in the situation that of fire, do not open circuit, thereby guaranteed the unimpeded of circuit, play firm protective effect, life and salvage operation for personnel, gain time to greatest extent; Lock armo structure has improved self fire resistance rating of cable, and the bending radius of being convenient in addition be laid in is compared with circlet border.
Compared with the prior art, beneficial effect of the present invention is embodied in:
The present invention adopts the stranded compact conductor structure of aluminum alloy materials, when guaranteeing current-carrying capacity of cable, make that cable weight reduces approximately 30%, cost reduction is approximately more than 35%, alleviating of weight makes cable be easy to transportation, mounting and installation, simultaneous oxidation aluminium is good antioxygen layer, can finely avoid the inner oxidation that continues, improve the stability of current-carrying capacity of cable.
Insulating layer material choose main consideration three aspect factor: the one, effect of heat insulation; The 2nd, be convenient to continuous production; The 3rd, material cost.It is basis for estimation that effect of heat insulation mainly be take the conductive coefficient of material, and normal heat-barrier material glass fibre and the basalt fiber material effect of heat insulation adopting is best at present, but because its more crisp meeting is made troubles to production; Although asbestos material processing characteristics is better, but material thermal conductivity is higher comparatively speaking, need thermal insulation layer thickness thicker, conductor temperature can not be dispersed in air in time, cause current-carrying capacity of cable to reduce, and cause that the outside diameter of cable is bigger than normal makes troubles to laying installation.Ceramic fibre material is a kind of collection conventional insulation material, and conductive coefficient is less, cost is low, thin thickness, and comprehensive above consideration determines to adopt ceramic fibre strip to replace asbestos yarn as thermal insulation layer.
Lock armo layer is that 5000 series alloys band composite ceramics SiClx rubber annealing calenderings form, intensity is high, resistance to wear is strong, belong to nonmagnetic substance, during collision, can not produce spark, approach while easily firing article safe and reliablely, its structure has better bendability, be convenient to lay, also can stop flame directly to impact restrictive coating simultaneously.
Under thermal insulation layer and lock armo layer applied in any combination, cable under more than 750 ℃ flame condition after 90min cable internal temperature 300 ℃ of left and right, realized the possibility that fusing point 680 ℃ of aluminium alloys can not be done fire-resisting cable conductor.
Watertight composition is closely arranged and is formed by the non-water sucting belt cross-linked polymer of a plurality of circles water absorption wood pulp fibres, can effectively improve the water resistance of cable.
Accompanying drawing explanation
Fig. 1 is the schematic cross-section of cable of the present invention.
Number in the figure: 1. aluminium wire heater wire, 2. aluminium alloy conductor, 3. internal shield, 4. silicon rubber belting layer, 5. outer shielding layer, 6. skinning cortex, 7. packed layer, 8. watertight composition, 9. thermal insulation layer, 10. lock armo layer.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described:
In a kind of aluminium alloy, press fireproof power cable, comprise several cores, described core is by aluminium alloy conductor 2 and the internal shield 3 that is wrapped in successively from inside to outside aluminium alloy conductor 2 outsides, silicon rubber belting layer 4, outer shielding layer 5, skinning cortex 6 forms, described core is set with watertight composition 8 outward successively, thermal insulation layer 9, between described core and described watertight composition 8, be extruded with packed layer 7, described thermal insulation layer 8 coated outside interlocking armours 10, described watertight composition 8 is closely arranged and is formed by the non-water sucting belt cross-linked polymer of a plurality of circles water absorption wood pulp fibres, described aluminium alloy conductor 2 is to be formed to right rotation is stranded by multiply aluminum-alloy wire, described outer shielding layer 5 inside are provided with an aluminium wire heater wire 1, described core is three groups, described internal shield 3, outer shielding layer 5 are semiconductive shielding layer, described skinning cortex 6 is crosslinked polyetylene insulated layer, described packed layer 7 materials are fire-retardant asbestos cord, described thermal insulation layer 9 is refractory ceramic fibre band, described lock armo layer 10 is that 5000 series alloys band composite ceramics SiClx rubber annealing calenderings form.
Embodiment: in conjunction with the manufacture process of pressing fireproof power cable in a kind of aluminium alloy is described shown in Fig. 1: first rare earth aluminium alloy silk is pressed stranded through circle, and be annealed into round conductor, there is good creep resistance, corrosion resistance, anti-outer impact property, aluminium alloy conductor is outer three-layer co-extruded by internal shield, silicon rubber belting layer, outer shielding layer, adopt again crosslinked polyethylene parcel, follow multicore core stranding and adopt the fire-retardant asbestos of gasket for packing to fill rounding; At the wrapped ceramic fibre strip thermal insulation layer in outside of filling the core of rounding,
Outside extrudes the lock armo layer that 5000 series alloys band composite ceramics SiClx rubber annealing calenderings form again, not short circuit of protection circuit, opens circuit, and as itself not burning in heat insulation, can be used as the gear fire bed of cable simultaneously, improves cable fire grade.Wherein, the watertight composition 8 that special setting is closely arranged and formed by the non-water sucting belt cross-linked polymer of a plurality of circles water absorption wood pulp fibres between thermal insulation layer and packed layer, can effectively improve the water resistance of cable.Meanwhile, in outer shielding layer inside, be provided with an aluminium wire heater wire.
Although above concrete mode of the present invention has been given to describe in detail and explanation; but what should indicate is that we can change and revise according to conception of the present invention is carried out to various equivalences to above-mentioned various execution modes; when its function producing does not exceed spiritual that specification contains yet, all should be within protection scope of the present invention.
Claims (7)
1. in an aluminium alloy, press fireproof power cable, comprise several cores, it is characterized in that: described core is by aluminium alloy conductor and the internal shield that is wrapped in successively from inside to outside aluminium alloy conductor outside, silicon rubber belting layer, outer shielding layer, skinning cortex forms, described core is set with watertight composition outward successively, thermal insulation layer, between described core and described watertight composition, be extruded with packed layer, described thermal insulation layer coated outside interlocking armour, described watertight composition is closely arranged and is formed by the non-water sucting belt cross-linked polymer of a plurality of circles water absorption wood pulp fibres, described aluminium alloy conductor is to be formed to right rotation is stranded by multiply aluminum-alloy wire, described outer shielding layer inside is provided with an aluminium wire heater wire.
2. according to the middle pressure fireproof power cable described in claim 1, it is characterized in that: described core is three groups.
3. according to pressing fireproof power cable in the aluminium alloy described in claim 1, it is characterized in that: described internal shield, outer shielding layer are semiconductive shielding layer.
4. according to pressing fireproof power cable in the aluminium alloy described in claim 1, it is characterized in that: described skinning cortex material is crosslinked polyethylene.
5. according to pressing fireproof power cable in the aluminium alloy described in claim 1, it is characterized in that: described packed layer material is fire-retardant asbestos cord.
6. according to pressing fireproof power cable in the aluminium alloy described in claim 1, it is characterized in that: described thermal insulation layer is refractory ceramic fibre band.
7. according to pressing fireproof power cable in the aluminium alloy described in claim 1, it is characterized in that: described lock armo layer is that 5000 series alloys band composite ceramics SiClx rubber annealing calenderings form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410324973.0A CN104112538A (en) | 2014-07-09 | 2014-07-09 | Aluminum-alloy medium-voltage fireproof power cable |
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| CN201410324973.0A CN104112538A (en) | 2014-07-09 | 2014-07-09 | Aluminum-alloy medium-voltage fireproof power cable |
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| CN104112538A true CN104112538A (en) | 2014-10-22 |
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| CN201410324973.0A Pending CN104112538A (en) | 2014-07-09 | 2014-07-09 | Aluminum-alloy medium-voltage fireproof power cable |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105931712A (en) * | 2016-04-22 | 2016-09-07 | 安徽瑞莱尔仪表有限公司 | Copper alloy cable with great fire resistance |
| CN108806859A (en) * | 2018-08-30 | 2018-11-13 | 安徽华上电缆科技有限公司 | A kind of fireproof wear-resisting copper core armoured power cable |
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| CN202373359U (en) * | 2011-12-19 | 2012-08-08 | 青岛华光电缆有限公司 | Novel fire-resistant and flame-retardant computer cable |
| CN202796199U (en) * | 2012-07-19 | 2013-03-13 | 江苏双登电力科技有限公司 | Novel direct-current traction cable for rail transportation |
| CN203055511U (en) * | 2012-12-06 | 2013-07-10 | 安徽猎塔电缆集团有限公司 | Silicone rubber insulated cable |
| CN103258595A (en) * | 2013-05-27 | 2013-08-21 | 浙江万马集团特种电子电缆有限公司 | Seawater-corrosion-resistant coaxial cable |
| CN103646702A (en) * | 2013-11-29 | 2014-03-19 | 四川鑫电电缆有限公司 | Aluminum alloy middle-voltage fire-resistant cable |
| CN203520905U (en) * | 2013-09-27 | 2014-04-02 | 安徽华天电缆有限公司 | High-temperature resisting compensation special cable |
| CN203552775U (en) * | 2013-10-15 | 2014-04-16 | 中国西电集团公司 | A flame retardation soft type rail-traffic-used direct current power cable |
| CN203950607U (en) * | 2014-07-09 | 2014-11-19 | 安徽华菱电缆集团有限公司 | In a kind of aluminium alloy, press fireproof power cable |
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2014
- 2014-07-09 CN CN201410324973.0A patent/CN104112538A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202373359U (en) * | 2011-12-19 | 2012-08-08 | 青岛华光电缆有限公司 | Novel fire-resistant and flame-retardant computer cable |
| CN202796199U (en) * | 2012-07-19 | 2013-03-13 | 江苏双登电力科技有限公司 | Novel direct-current traction cable for rail transportation |
| CN203055511U (en) * | 2012-12-06 | 2013-07-10 | 安徽猎塔电缆集团有限公司 | Silicone rubber insulated cable |
| CN103258595A (en) * | 2013-05-27 | 2013-08-21 | 浙江万马集团特种电子电缆有限公司 | Seawater-corrosion-resistant coaxial cable |
| CN203520905U (en) * | 2013-09-27 | 2014-04-02 | 安徽华天电缆有限公司 | High-temperature resisting compensation special cable |
| CN203552775U (en) * | 2013-10-15 | 2014-04-16 | 中国西电集团公司 | A flame retardation soft type rail-traffic-used direct current power cable |
| CN103646702A (en) * | 2013-11-29 | 2014-03-19 | 四川鑫电电缆有限公司 | Aluminum alloy middle-voltage fire-resistant cable |
| CN203950607U (en) * | 2014-07-09 | 2014-11-19 | 安徽华菱电缆集团有限公司 | In a kind of aluminium alloy, press fireproof power cable |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105931712A (en) * | 2016-04-22 | 2016-09-07 | 安徽瑞莱尔仪表有限公司 | Copper alloy cable with great fire resistance |
| CN108806859A (en) * | 2018-08-30 | 2018-11-13 | 安徽华上电缆科技有限公司 | A kind of fireproof wear-resisting copper core armoured power cable |
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Application publication date: 20141022 |
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