CN203950607U - In a kind of aluminium alloy, press fireproof power cable - Google Patents
In a kind of aluminium alloy, press fireproof power cable Download PDFInfo
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- CN203950607U CN203950607U CN201420377560.4U CN201420377560U CN203950607U CN 203950607 U CN203950607 U CN 203950607U CN 201420377560 U CN201420377560 U CN 201420377560U CN 203950607 U CN203950607 U CN 203950607U
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Abstract
The utility model discloses in a kind of aluminium alloy and press fireproof power cable, comprise several cores, described core is by aluminium alloy conductor and is wrapped in the internal shield outside aluminium alloy conductor, silicon rubber belting layer, outer shielding layer, skinning cortex composition, core is set with packed layer outward, watertight composition, thermal insulation layer, thermal insulation layer coated outside interlocking armour, watertight composition is closely arranged and is formed by the non-water sucting belt cross-linked polymer of multiple circles water absorption wood pulp fibres, aluminium alloy conductor is to be formed to right rotation is stranded by multiply aluminum-alloy wire, outer shielding layer inside is provided with an aluminium wire heater wire.The utility model had both ensured the basic function of normal power transmission and distribution, had again excellent machinery, economy, security performance, and creep resistance, acid and alkali-resistance, water-and fire-proof are widely used in the fields such as generating, metallurgy, chemical petroleum.
Description
Technical field
The utility model relates to a kind of midium voltage cable, refers more particularly in a kind of aluminium alloy and presses 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 made up 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.
Utility model content
In order to overcome the defect of above-mentioned prior art, the utility model provides in a kind of aluminium alloy and presses fireproof power cable, and this cable has excellent machinery, economy, security performance, creep resistance, acid and alkali-resistance, fire-resistant waterproof.
The utility model technical solution problem 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 is wrapped in successively from inside to outside the internal shield of aluminium alloy conductor outside, silicon rubber belting layer, outer shielding layer, skinning cortex composition, 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 multiple 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 utility model 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 ensured the unimpeded of circuit, play firm protective effect, for personnel's life and salvage operation, 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, the beneficial effects of the utility model are embodied in:
The utility model adopts the stranded compact conductor structure of aluminum alloy materials, in 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 transport, 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.Effect of heat insulation is mainly taking the conductive coefficient of material as basis for estimation, 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, when collision, can not produce spark, approaching 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 more than 750 DEG C under flame condition after 90min cable internal temperature 300 DEG C of left and right, realized fusing point 680 DEG C of aluminium alloys and can not do the possibility of fire-resisting cable conductor.
Watertight composition is closely arranged and is formed by the non-water sucting belt cross-linked polymer of multiple circles water absorption wood pulp fibres, can effectively improve the water resistance of cable.
Brief description of the drawings
Fig. 1 is the schematic cross-section of the utility model cable.
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 utility model is described further:
In a kind of aluminium alloy, press fireproof power cable, comprise several cores, described core is by aluminium alloy conductor 2 and is wrapped in successively from inside to outside the internal shield 3 of 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 multiple 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 by three-layer co-extruded to 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 core of filling 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, between thermal insulation layer and packed layer, special setting, by the non-water sucting belt cross-linked polymer of the multiple circles water absorption wood pulp fibres watertight composition 8 forming of closely arranging, can effectively improve the water resistance of cable.Meanwhile, be provided with an aluminium wire heater wire in outer shielding layer inside.
Although above concrete mode of the present utility model has been given to describe in detail and explanation; but what should indicate is that we can change and amendment according to conception of the present utility model 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 range of the present utility model.
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 is wrapped in successively from inside to outside the internal shield of aluminium alloy conductor outside, silicon rubber belting layer, outer shielding layer, skinning cortex composition, 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 multiple 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.
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