CN104810094A - Crosslinked polyethylene insulating and refractory armored cable with rated voltage of 10 KV and manufacturing method thereof - Google Patents

Crosslinked polyethylene insulating and refractory armored cable with rated voltage of 10 KV and manufacturing method thereof Download PDF

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Publication number
CN104810094A
CN104810094A CN201510164031.5A CN201510164031A CN104810094A CN 104810094 A CN104810094 A CN 104810094A CN 201510164031 A CN201510164031 A CN 201510164031A CN 104810094 A CN104810094 A CN 104810094A
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China
Prior art keywords
layer
cable
conductor
crosslinked
shielding layer
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Pending
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CN201510164031.5A
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Chinese (zh)
Inventor
肖云涛
刘书全
李恒刚
高江涛
陈隆京
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Western Cable Co Ltd
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Western Cable Co Ltd
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Priority to CN201510164031.5A priority Critical patent/CN104810094A/en
Publication of CN104810094A publication Critical patent/CN104810094A/en
Pending legal-status Critical Current

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Abstract

The invention relates to the technical field of cables and particularly discloses a crosslinked polyethylene insulating and refractory armored cable with a rated voltage of 10 KV and a manufacturing method thereof. The crosslinked polyethylene insulating and refractory armored cable with the rated voltage of 10 KV comprises a plurality of cable cores, a taped cover layer, a refractory layer, an isolating layer, an armor layer and an outer sheath layer, wherein the taped cover layer, the refractory layer, the isolating layer, the armor layer and the outer sheath layer are sequentially arranged outside the cable cores. Every cable core is compose of a conductor, an internal shielding layer, an insulating layer, an external shielding layer and a metal shielding layer, wherein the internal shielding layer, the insulating layer, the external shielding layer and the metal shielding layer are sequentially arranged outside the conductor in a wrapped mode; the cable cores are separated through fillings. The crosslinked polyethylene insulating and refractory armored cable with the rated voltage of 10 KV has the advantages of being high in safety performance, improving the power supply reliability of a power supply system in fire conditions, ensuring power supply reliability in the fire conditions and facilitate evacuation and rescue of personnel.

Description

The crosslinked polyetylene insulated fireproof armored cable of rated voltage 10KV and manufacture method thereof
Technical field
The present invention relates to field of cable technology, refer to the crosslinked polyetylene insulated fireproof armored cable of a kind of rated voltage 10KV especially.
Background technology
No matter there is which type of fire, for keep electric equipments (include but not limited to smoke detector, automatic alarm system, emergent electric bell or siren, fire pump, ventilation smoke exhaust equipment, water sprinkler, water spray device, electronic fire-suppression bottle (carbon dioxide, halide or powder), the identification light of broadcasting equipment, fire escape and escape hatch, emergency elevator, emergency power supply socket, and control with the current supply circuit such as commander's hinge and communicate, control system) running status and provide power supply supply endlessly and information transmission to be very important.It enables people escape the inferno with the fastest speed and be conducive to the carrying out of fire fighting work.Make these devices or equipment not power-off is concurrent in a fire to wave its function, just must use fire-resisting cable.So-called fire-resisting cable, the cable that certain hour can be kept normally to run under regulation flame combustion condition exactly; The cable of circuit integrality can be kept in other words under burning condition.
In recent years, fire incident occurred again and again, had caused people to the concern in the emphasis public safety places such as heavy construction, tunnel, track traffic, large stadium and worry.NFA security department also establishes public place flame-retardant identity management system, improve the access door of public place flame-retardant architecture decorative product, this measure both provided opportunity to develop for flame retardant cable and fire-resisting cable market, also for fire-retardant and fire-resisting cable product propose requirements at the higher level.
At present, the fire-resisting cable used on the market is still based on the overlapping around-packing technology of multi layer cloud master tape.Because mica tape is under the high-temperature condition of fire, electric property can produce the impact of cataclysm, therefore the electric pressure of fire-resisting cable is still used on 1kV and following low-voltage lines and electric equipment.The electric pressure of fire-resisting cable main is at present 0.6/1kV.
Along with the fast development of China's economy, the densely populated place occasions such as the important job facilities such as subway, power plant, nuclear power station, tunnel and skyscraper, intelligent residential district, large supermarket, public place get more and more, especially skyscraper quantity increases especially, and many buildings become the landmark building in city, place.Because the supply district of 1kV power cable only has 500m, for high-rise, if adopt 0.6/1kV low voltage distribution by convention, its cable consumption and laying installation workload, comparatively common building thing becomes decades of times to increase, and cable laying space becomes several times of growths, both material was wasted, power consumption is very high again, and in building, cable laying is too much, also can bring adverse effect to safe handling.Therefore, building brings into use 8.7/10kV midium voltage cable to power, and transformer is arranged on centre or the top of building floor, and midium voltage cable is laid in connection transformer in vertical shaft, after transformer pressure-reducing, powers to relevant equipment.In order to ensure the power supply reliability under Fire Conditions, needing the fire-resisting cable using rated voltage 8.7/10kV, requiring that cable still can be powered constantly under flame condition within a period of time, be beneficial to the rescue of fire and fleeing from and evacuating of personnel.
Summary of the invention
The object of this invention is to provide the crosslinked polyetylene insulated fireproof armored cable of a kind of rated voltage 10KV, rated voltage is 8.7/10kV, this cable usage safety performance is higher, the power supply reliability of electric power system under fire hazard environment can be improved, cable still can be powered sustainedly and stably when calcination within a period of time, improve power supply reliability, decrease cable consumption and lay space.
To achieve these goals, present invention employs following technical scheme: the crosslinked polyetylene insulated fireproof armored cable of a kind of rated voltage 10KV, comprise many cable cores and be set in turn in belting layer, flame retardant coating, separator, armour and the external sheath layer outside cable core; Described cable core comprises conductor and is coated on internal shield, insulating barrier, outer shielding layer and the metal screen layer outside conductor successively; Separated by filler between described cable core, described internal shield and outer shielding layer adopt semiconductive material to make, and described insulating barrier adopts peroxide crosslinked polyethylene insulating material to make.
Wherein, described conductor is oxygen-free copper single line.
Manufacture a method for above-mentioned cable, comprise the following steps:
S1, wire drawing, adopt the oxygen-free copper bar of Ф 8.00mm, be drawn into the single round copper wire of Ф 1.52-3.10mm, this single round copper wire is carried out annealing in process through 8-13 road mould, annealing electric current 1000-1800A; Single round copper wire any surface finish, without greasy dirt, light.
S2, conductor strand, according to different conductor specifications, select radical and the line diameter of different single round copper wire, stranded on frame type stranding machine, carries out drawing, presses process, presses 0.85-0.9 times that mould is conductor diameter before non-drawing; The twisting pitch of the difference number of plies is different, and innermost layer is 18-20 times of this layer of external diameter, and doubly, secondary skin is 14-18 times to adjacent outer 16-18, and outermost layer is 12-14 times, and conductive surface is smooth, impulse-free robustness, not damaged.
S3, three-layer co-extruded, by internal shield, insulating barrier and outer shielding layer are once extruded in conductive surface, internal shield is not strippable semiconductive material, insulating barrier is 10KV peroxide crosslinked polyethylene insulating material, outer shielding layer is strippable semi-conducting material, three-layer co-extruded manufacturing process is carried out on stretched wire or cross-linking production line, insulated wire cores is with the crosslinked pipeline of nitrogen protection after extruding, crosslinked under the pressure of high temperature and nitrogen, pipe temperature 260-280 DEG C, pressure 0.8-1MPa, insulated wire cores by crosslinked pipeline laggard enter circulating water pipeline cool, insulated wire places 48 hours in natural environment, remove the crosslinked accessory substance produced,
S4, metallic shield, insulated wire cores adopts that copper strips is wrapped puts up structure;
S5, stranding, cable core adopts alkali-free glass silk ribbon wrapped, adopts the space of alkali-free glass fiber yarn filled cable;
S6, fire-resistant, the outer wrapped flame retardant coating of stranding cable core, flame retardant coating adopts fire-resistant rubber band wrapped on cable core; Fire-resistant rubber band is rolled by Ceramic silicon rubber and high temperature resistance glass fiber cloth to be composited;
S7, isolation, arrange the rubber-covered separator of high flame retardant at described flame retardant coating outer surface;
S8, armouring, adopt bimetallic strip or compact arranged wire sheathed structure;
S9, oversheath, adopt the outsourcing of chlorinated polyethylene sheath material, the obtained ethylene propylene rubber insulated fireproof armored cable of 10KV.
Beneficial effect of the present invention is: after adopting above-mentioned cable, the crosslinked polyetylene insulated fireproof armored cable of rated voltage 10KV, compared with common 8.7/10kV crosslinked cable, security performance is higher, the power supply reliability of electric power system under fire hazard environment can be improved, cable still can be powered sustainedly and stably when calcination within a period of time, during burning, cable does not distribute toxic gas, the smog distributed can not etching apparatus, smothering action can not be produced to personnel, the evacuation egress and the rescue that are conducive to personnel are carried out, and can not be formed " secondary disaster ".The Design and manufacture of the crosslinked polyetylene insulated fireproof armored cable of rated voltage 10KV, achieves the fire resistance of middle pressure crosslinked cable, improves power supply reliability, decreases cable consumption and lays space.
Accompanying drawing explanation
In order to be illustrated more clearly in embodiment of the present invention technical scheme, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only that the present invention is in order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below the accompanying drawing used required in p-embodiment or description of the prior art is briefly described, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The crosslinked polyetylene insulated fireproof armored cable of a kind of rated voltage 10KV as shown in Figure 1, rated voltage is 8.7/10kV, comprises many cable cores (1) and is set in turn in cable core (1) belting layer outward (2), flame retardant coating (3), separator (6), armour (7) and external sheath layer (4); Described cable core (1) comprises conductor (11) and is coated on conductor (11) internal shield outward (12), insulating barrier (13), outer shielding layer (14) and metal screen layer (15) successively; Separated by filler (5) between described cable core (1).
A kind of method manufacturing the ethylene propylene rubber insulated fireproof armored cable of rated voltage 10kV:
S1, wire drawing, adopt the oxygen-free copper bar of Ф 8.00mm, be drawn into the single round copper wire of Ф 1.52-3.10mm, this single round copper wire is carried out annealing in process through 8-13 road mould, annealing electric current 1000-1800A; Single round copper wire any surface finish, without greasy dirt, light.
S2, conductor strand, according to different conductor (11) specifications, select radical and the line diameter of different single round copper wire, stranded on frame type stranding machine, carry out drawing, press process, press 0.85-0.9 times that mould is conductor (11) external diameter before non-drawing; The twisting pitch of the difference number of plies is different, and innermost layer is 18-20 times of this layer of external diameter, and doubly, secondary skin is 14-18 times to adjacent outer 16-18, and outermost layer is 12-14 times, conductor (11) smooth surface, impulse-free robustness, not damaged.
S3, three-layer co-extruded, by internal shield (12), insulating barrier (13) and outer shielding layer (14) are once extruded in conductor (11) surface, internal shield (12) is not strippable semiconductive material, insulating barrier (13) is 10KV peroxide crosslinked polyethylene insulating material, outer shielding layer (14) is strippable semi-conducting material, three-layer co-extruded manufacturing process is carried out on stretched wire or cross-linking production line, insulated wire cores is with the crosslinked pipeline of nitrogen protection after extruding, crosslinked under the pressure of high temperature and nitrogen, pipe temperature 260-280 DEG C, pressure 0.8-1MPa, insulated wire cores by crosslinked pipeline laggard enter circulating water pipeline cool, insulated wire places 48 hours in natural environment, remove the crosslinked accessory substance produced.
Metal screen layer (15) insulated wire cores adopts that copper strips is wrapped puts up structure.The 10kV electric power system of China, many employing grounding through arc modes, during single-phase earthing, short circuit current is at below 1kA.By changing width and the thickness of shielding soft copper band, adjusting copper strips sectional area, different short circuit current can be met and pass through.
Adopt comparatively fine pith during stranding, the twist is comparatively large, can improve the bending property of cable.Cable core (1) employing alkali-free glass silk ribbon is wrapped, smooth, smooth, corrugationless.Adopt the space of alkali-free glass fiber yarn filled cable, keep cable outward appearance rounding.
Cable core (1) is wrapped flame retardant coating (3) outward.Flame retardant coating (3) adopts fire-resistant rubber band lapping structure.Fire-resistant rubber band is rolled by fire-resisting ceramic silicone rubber and high temperature resistance glass fiber cloth to be composited; start hardening under 350 DEG C and above flame or nonflame condition; reach as high as 3000 DEG C; along with temperature raises; burnt till complete ceramic-like stiff shell rapidly; the ablation time is longer; temperature is higher; housing is firmly harder; the stiff shell generated after burning is coated on cable core (1); isolated flame and heat are to cable internal delivery and spread, and form good protective effect to insulated wire cores, ensure unimpeded under Fire Conditions of circuit.The existence of flame retardant coating (3), can keep out the injury to insulation of flame and heat.
Wherein, described separator (6) adopts the halogen-free material of high flame retardant to be extruded on flame retardant coating.Under flame, can amount of heat be absorbed and crust, the heat radiation of the two ends of common cable is changed into comprehensive heat radiation, increasing heat radiation area, reducing flame temperature to the injury of cable.
Wherein, described armour (7) adopts bimetallic strip or compact arranged wire sheathed structure, can keep out flame and spread to cable inside, reduces flame to the harm of refractory protection.Metal tape armour structural cable can bear certain radial compression applied.Wire sheathed structure can bear larger pulling force, and the occasion being suitable for the drops such as vertical shaft larger is laid.
External sheath layer (4) adopts the halogen-free flame-retardant sheath material of high flame retardant to be extruded on cable core (1).Under flame, can absorb amount of heat, discharge the crystallization water and crust, the temperature of reduction cable surface and flame are to the injury of cable.By the fire resistive construction of fire-retardant oversheath-flame retardant coating (3), realize the function that cable is powered sustainedly and stably in a period of time under flame combustion condition.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (3)

1. the crosslinked polyetylene insulated fireproof armored cable of rated voltage 10KV, it is characterized in that, comprise many cable cores (1) and be set in turn in cable core (1) belting layer outward (2), flame retardant coating (3), separator (6), armour (7) and external sheath layer (4); Described cable core (1) comprises conductor (11) and is coated on conductor (11) internal shield outward (12), insulating barrier (13), outer shielding layer (14) and metal screen layer (15) successively; Separated by filler (5) between described cable core (1), described internal shield (12) and outer shielding layer (14) adopt semiconductive material to make, and described insulating barrier (13) adopts peroxide crosslinked polyethylene insulating material to make.
2. the crosslinked polyetylene insulated fireproof armored cable of rated voltage 10KV according to claim 1, is characterized in that: described conductor (11) is oxygen-free copper single line.
3. a method for cable described in any one of manufacturing claims 1-2, is characterized in that, comprise the following steps:
S1, wire drawing, adopt the oxygen-free copper bar of Ф 8.00mm, be drawn into the single round copper wire of Ф 1.52-3.10mm, this single round copper wire is carried out annealing in process through 8-13 road mould, annealing electric current 1000-1800A;
S2, conductor strand, according to different conductor (11) specifications, select radical and the line diameter of different single round copper wire, stranded on frame type stranding machine, carry out drawing, press process, press 0.85-0.9 times that mould is conductor (11) external diameter before non-drawing;
S3, three-layer co-extruded, by internal shield (12), insulating barrier (13) and outer shielding layer (14) are once extruded in conductor (11) surface, internal shield (12) is not strippable semiconductive material, insulating barrier (13) is 10KV peroxide crosslinked polyethylene insulating material, outer shielding layer (14) is strippable semi-conducting material, three-layer co-extruded manufacturing process is carried out on stretched wire or cross-linking production line, insulated wire cores is with the crosslinked pipeline of nitrogen protection after extruding, crosslinked under the pressure of high temperature and nitrogen, pipe temperature 260-280 DEG C, pressure 0.8-1MPa, insulated wire cores by crosslinked pipeline laggard enter circulating water pipeline cool, insulated wire places 48 hours in natural environment, remove the crosslinked accessory substance produced,
S4, metallic shield, insulated wire cores adopts that copper strips is wrapped puts up structure;
S5, stranding, cable core adopts alkali-free glass silk ribbon wrapped, adopts the space of alkali-free glass fiber yarn filled cable;
S6, fire-resistant, the outer wrapped flame retardant coating of stranding cable core, flame retardant coating adopts fire-resistant rubber band wrapped on cable core; Fire-resistant rubber band is rolled by Ceramic silicon rubber and high temperature resistance glass fiber cloth to be composited;
S7, isolation, arrange the rubber-covered separator of high flame retardant at described flame retardant coating outer surface;
S8, armouring, adopt bimetallic strip or compact arranged wire sheathed structure;
S9, oversheath, adopt the outsourcing of chlorinated polyethylene sheath material, the obtained ethylene propylene rubber insulated fireproof armored cable of 10KV.
CN201510164031.5A 2015-04-09 2015-04-09 Crosslinked polyethylene insulating and refractory armored cable with rated voltage of 10 KV and manufacturing method thereof Pending CN104810094A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105976913A (en) * 2016-06-30 2016-09-28 江苏红峰电缆集团有限公司 Improved-type medium-voltage fireproof power cable
CN105976925A (en) * 2016-06-30 2016-09-28 江苏红峰电缆集团有限公司 Enhanced-type fireproof high-voltage cable
CN106158133A (en) * 2016-08-29 2016-11-23 远程电缆股份有限公司 Middle pressure fireproof power cable
CN106356142A (en) * 2016-11-10 2017-01-25 国网山东省电力公司济南市长清区供电公司 Preparation method of fire resistant cable for electric power transmission
CN107945946A (en) * 2018-01-02 2018-04-20 无锡江南电缆有限公司 A kind of hybrid computer flat cable

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105976913A (en) * 2016-06-30 2016-09-28 江苏红峰电缆集团有限公司 Improved-type medium-voltage fireproof power cable
CN105976925A (en) * 2016-06-30 2016-09-28 江苏红峰电缆集团有限公司 Enhanced-type fireproof high-voltage cable
CN106158133A (en) * 2016-08-29 2016-11-23 远程电缆股份有限公司 Middle pressure fireproof power cable
CN106356142A (en) * 2016-11-10 2017-01-25 国网山东省电力公司济南市长清区供电公司 Preparation method of fire resistant cable for electric power transmission
CN107945946A (en) * 2018-01-02 2018-04-20 无锡江南电缆有限公司 A kind of hybrid computer flat cable

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