CN204087894U - Fire-retardant fire insulation midium voltage cable - Google Patents

Fire-retardant fire insulation midium voltage cable Download PDF

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Publication number
CN204087894U
CN204087894U CN201420545884.4U CN201420545884U CN204087894U CN 204087894 U CN204087894 U CN 204087894U CN 201420545884 U CN201420545884 U CN 201420545884U CN 204087894 U CN204087894 U CN 204087894U
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China
Prior art keywords
fire
retardant
layer
voltage cable
midium voltage
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CN201420545884.4U
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Chinese (zh)
Inventor
纪文明
纪文化
何新安
张明宇
高国彪
任世伟
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BEIJING TIANCHENG RUIYUAN CABLE Co Ltd
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BEIJING TIANCHENG RUIYUAN CABLE Co Ltd
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Abstract

The utility model relates to a kind of fire-retardant fire insulation midium voltage cable, comprise conduction insulated wire cores (1), the outer of described conduction insulated wire cores (1) is arranged with flame resistant filler layer (2), the outer of described flame resistant filler layer (2) is arranged with fire-retardant lapping layer (3), the outer of described fire-retardant lapping layer (3) is arranged with expandable flame retardant refuge floor (4), the periphery of described expandable flame retardant refuge floor (4) is wound around brace rod (7), the outer of described brace rod (7) is arranged with mutual blocking steel-tape armouring layer (5), the outer of described mutual blocking steel-tape armouring layer (5) is arranged with flame retardant sheath layer (6).This fire-retardant fire insulation midium voltage cable, has extremely strong flame-retardant performance, anticorrosive, radioresistance, can resist the thawing infiltration of various metal, be applicable to important public place.

Description

Fire-retardant fire insulation midium voltage cable
Technical field
The utility model belongs to field of cable technology, is specifically related to a kind of fire-retardant fire insulation midium voltage cable.
Background technology
Fire-retardant fire insulation midium voltage cable, its rated voltage 6-35KV, be mainly used in electrical power system transmission and distribute electric energy fixing laying-out, be used in densely populated electrified subway, the important social public arenas such as station, port and pier, square, sports center, skyscraper, clearinghouse computer, modern megastore.It has a series of advantage, as: excellent electric property and mechanical and physical performance; Excellent low smoke and zero halogen category-A anti-flammability; Have the amount of being fuming few, halogen acid gas burst size is little; Prevent fire spread and pernicious gas to the murder by poisoning of people and biology.
After in general, pressure fire-resisting cable adopts three stranded bunchys of core, wrapped compound glass strap or fire-resistant isinglass belt are used as flame retardant coating outside.Although but glass cloth tape or mica tape do not burn, its heat-proof quality is poor, external high temperature can be transmitted to cable inside very soon, insulation is melted and causes puncture short.The utility model improves with regard to fire-retardant and high temperature resistant these two aspects, has obtained fire-retardant fire insulation midium voltage cable, makes cable can be used in the higher occasion of flame-retardant degree, and has extremely strong resistant of high or low temperature, corrosion resistance, radiation resistance; The thawing infiltration of various metal can be resisted, there is larger market potential.
Utility model content
For the defect existed in prior art, the utility model provides a kind of fire-retardant fire insulation midium voltage cable, and this cable has extremely strong flame-retardant, corrosion resistance, radiation resistance; The thawing infiltration of various metal can be resisted simultaneously.
For reaching above object, the technical solution adopted in the utility model is: provide a kind of fire-retardant fire insulation midium voltage cable, comprise conduction insulated wire cores, the outer of described conduction insulated wire cores is arranged with flame resistant filler layer, the outer of described flame resistant filler layer is arranged with fire-retardant lapping layer, the outer of described fire-retardant lapping layer is arranged with expandable flame retardant refuge floor, the periphery of described expandable flame retardant refuge floor is wound around brace rod, the outer of described brace rod is arranged with mutual blocking steel-tape armouring layer, described the outer of mutual blocking steel-tape armouring layer is arranged with flame retardant sheath layer, cavity is formed between described expandable flame retardant refuge floor and described mutual blocking steel-tape armouring layer.
Further, described expandable flame retardant refuge floor is the fire-retardant refuge floor of expanded graphite.
Further, described flame resistant filler layer is glass cord packed layer.
Further, described fire-retardant lapping layer is glass fiber tape lapping layer.
Further, described brace rod is glass fibre bar brace rod.
Further, described mutual blocking steel-tape armouring layer is zinc-plated mutual blocking steel-tape armouring layer.
Further, described flame retardant sheath layer is polyolefin flame-retardant restrictive coating.
Further, described conduction insulated wire cores comprises conductor, conductor shield, insulating barrier, insulation screen and copper strip shielding layer from inside to outside successively.
Further, described conductor shield is strip copper conductor screen; Described conductor shield and insulation screen are semiconductive screen; Described insulating barrier is crosslinked polyetylene insulated layer; Described copper strip shielding layer is electrician's copper belt screen.
Further, described brace rod is three, and three described brace rods are wrapped in described expandable flame retardant refuge floor periphery uniformly.
Advantageous Effects of the present utility model is:
The utility model by being provided with expandable flame retardant refuge floor outside fire-retardant lapping layer, expandable flame retardant refuge floor adopts expanded graphite synthetic material, when cable is in high temperature or external firing, expanded graphite fire-retardant refuge floor temperature to start when reaching 220 DEG C to expand, and is full of whole cavity at 230 DEG C of-280 DEG C of undergoes rapid expansion.Maximum swelling volume is reached, maximum 280 times of may be expanded to original volume 1100 DEG C time.Graphite after expansion becomes vermiform by original flake, is full of whole cavity, forms an extraordinary heat insulation layer; Graphite after expansion is the carbon source in intumescent system is again thermal insulation layer, can be effectively heat insulation; Himself release rate is in a fire very low, and mass loss is very little, and the flue gas of generation is little, has resistant of high or low temperature, corrosion resistance, radiation resistance, can also resist the thawing infiltration of various metal simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of the fire-retardant fire insulation midium voltage cable of the utility model;
Fig. 2 conducts electricity the structural representation of insulated wire cores in Fig. 1.
In figure:
1-conduction insulated wire cores 2-flame resistant filler layer 3-fire-retardant lapping layer 4-fire-retardant refuge floor 5-mutual blocking steel-tape armouring layer 6-flame retardant sheath layer 7-brace rod 8-cavity 101-conductor 102-conductor shield 103-insulating barrier 104-insulation screen 105-copper strip shielding layer
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
As shown in Figure 1, be the fire-retardant fire insulation midium voltage cable that the utility model provides.This cable comprises three conductions insulated wire cores 1, flame resistant filler layer 2, fire-retardant lapping layer 3, expandable flame retardant refuge floor 4, three brace rods 7, mutual blocking steel-tape armouring layer 5 and flame retardant sheath layer 6 from inside to outside successively.Wherein, multiple cavity 8 is formed between expandable flame retardant refuge floor 4 and mutual blocking steel-tape armouring layer 5.
Flame resistant filler layer 2 is glass cord packed layer, between the gap being filled in three conduction insulated wire cores 1, and by three conduction insulated wire cores 1 peripheral full circle.
Fire-retardant lapping layer 3 is glass fiber tape lapping layer, and glass fibre has good insulating, thermal endurance is strong, corrosion resistance good and mechanical strength is high advantage.
Expandable flame retardant refuge floor 4 is the fire-retardant synthesis refuge floor of expanded graphite.When cable is in high temperature or external firing, starts when the fire-retardant refuge floor temperature of expanded graphite reaches 220 DEG C to expand, be full of whole cavity at 230 DEG C of-280 DEG C of undergoes rapid expansion.Maximum swelling volume is reached, maximum 280 times of may be expanded to original volume 1100 DEG C time.Graphite after expansion becomes vermiform by original flake, form an extraordinary heat insulation layer, the graphite flake after expansion is the carbon source in intumescent system is again that thermal insulation layer can be effectively heat insulation, and himself release rate is in a fire very low, mass loss is very little, and the flue gas of generation is little.
Brace rod 7 is glass fibre bar brace rod, and the utility model adopts three brace rods 7, is wrapped in uniformly on expandable flame retardant refuge floor 4.
Mutual blocking steel-tape armouring layer 5 is hot galvanizing mutual blocking steel-tape armouring layer, and the bending property of cable is more superior, and when cabling, the radius of cable bend is little, and cable insulation can not be caused to ftracture.
Flame retardant sheath layer 6 is low-smoke halogen-free polyolefin flame retardant sheath layer, except having fire resistance, because not halogen-containing element, can not produce suffocative flue gas when breaking out of fire, can not cause secondary injury.
As shown in Figure 2, insulated wire cores 1 of conducting electricity comprises conductor 101, conductor shield 102, insulating barrier 103, insulation screen 104 and copper strip shielding layer 105.Wrapped up by conductor shield 102 outside conductor 101, wrapped up by insulating barrier 103 outside conductor shield 102, wrapped up by insulation screen 104 outside insulating barrier 103, wrapped up by copper strip shielding layer 105 outside insulation screen 104.
Conductor 101 is pressed by the annealed copper wire layer-stranding of some same diameter and forms; Conductor shield 102 and insulation screen 104 all adopt cross-linked polyolefin semiconductive material; Copper strip shielding layer 105 adopts electrician's copper belt; Insulating barrier 103 adopts processes for chemically crosslinked polyethylene material.
The manufacture craft production process of the utility model expandable flame retardant fire insulation midium voltage cable is as follows:
1) conductor 101 is according to the regulation of 2 class conductors in GB/T3956 standard and in conjunction with actual conditions selection suitable conductor, and determines the radical of insulated wire cores in conductor.Be drawn into required specification according to above-mentioned requirements to insulated wire cores, wire drawing is carried out and is annealed to conductor on wire drawing machine, stranded and press and form by contrary direction with stranding machine layering.Once outside conductor 101, upper conductor screen 102, insulating barrier 103 and insulation screen 104 is extruded with three-layer co-extruded extrusion apparatus.Then outside insulation screen 104, wrapped copper strip shielding layer 105 forms conduction insulated wire cores 1.
2) three conduction insulated wire cores 1 cabler stranded bunchys, to full circle simultaneously between gap fire proofing being filled in three insulated wire cores time stranded, then with fire-retardant band, full circle is tightened.One deck expandable flame retardant refuge floor is extruded with extruder outside fire-retardant band.
3) 3 equally distributed brace rods 7 are wound around outward at expandable flame retardant refuge floor, mutual blocking steel-tape armouring layer 5 is wound around with armoring machine outside brace rod 7, outside mutual blocking steel-tape armouring layer, extrude one deck fire retardant jacket with plastic extruding machine, thus be produced into a kind of expandable flame retardant fire insulation midium voltage cable described in the utility model.
Fire-retardant fire insulation midium voltage cable of the present utility model is not limited to above-mentioned embodiment, and those skilled in the art draw other execution mode according to the technical solution of the utility model, belongs to technological innovation scope of the present utility model equally.

Claims (10)

1. a fire-retardant fire insulation midium voltage cable, comprise conduction insulated wire cores (1), it is characterized in that: the outer of described conduction insulated wire cores (1) is arranged with flame resistant filler layer (2), the outer of described flame resistant filler layer (2) is arranged with fire-retardant lapping layer (3), the outer of described fire-retardant lapping layer (3) is arranged with expandable flame retardant refuge floor (4), the periphery of described expandable flame retardant refuge floor (4) is wound around brace rod (7), the outer of described brace rod (7) is arranged with mutual blocking steel-tape armouring layer (5), the outer of described mutual blocking steel-tape armouring layer (5) is arranged with flame retardant sheath layer (6), cavity (8) is formed between described fire-retardant refuge floor (4) and described armour (5).
2. fire-retardant fire insulation midium voltage cable as claimed in claim 1, is characterized in that: described expandable flame retardant refuge floor (4) is the fire-retardant refuge floor of expanded graphite.
3. fire-retardant fire insulation midium voltage cable as claimed in claim 2, is characterized in that: described flame resistant filler layer (2) is glass cord packed layer.
4. fire-retardant fire insulation midium voltage cable as claimed in claim 3, is characterized in that: described fire-retardant lapping layer (3) is glass fibre lapping layer.
5. fire-retardant fire insulation midium voltage cable as claimed in claim 4, is characterized in that: described brace rod (7) is glass fibre bar brace rod.
6. fire-retardant fire insulation midium voltage cable as claimed in claim 5, is characterized in that: described mutual blocking steel-tape armouring layer (5) is zinc-plated mutual blocking steel-tape armouring layer.
7. fire-retardant fire insulation midium voltage cable as claimed in claim 6, is characterized in that: described flame retardant sheath layer (6) is polyolefin flame-retardant restrictive coating.
8. the fire-retardant fire insulation midium voltage cable as described in any one of claim 1-7, is characterized in that: described conduction insulated wire cores (1) comprises conductor (101), conductor shield (102), insulating barrier (103), insulation screen (104) and copper strip shielding layer (105) from inside to outside successively.
9. fire-retardant fire insulation midium voltage cable as claimed in claim 8, is characterized in that: described conductor shield (102) is strip copper conductor screen; Described conductor shield (102) and insulation screen (104) are semiconductive screen; Described insulating barrier (103) is crosslinked polyetylene insulated layer; Described copper strip shielding layer (105) is electrician's copper belt screen.
10. fire-retardant fire insulation midium voltage cable as claimed in claim 9, is characterized in that: described brace rod (7) is three, and three described brace rods are wrapped in described expandable flame retardant refuge floor (4) periphery uniformly.
CN201420545884.4U 2014-09-22 2014-09-22 Fire-retardant fire insulation midium voltage cable Active CN204087894U (en)

Priority Applications (1)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105551631A (en) * 2016-02-03 2016-05-04 安徽瑞昊缆业有限公司 Multi-core industrial cable
CN105741935A (en) * 2016-02-03 2016-07-06 安徽长风电缆集团有限公司 Multi-core pressure-proof cable
CN106298021A (en) * 2016-10-27 2017-01-04 河北华伦线缆有限公司 Mesohigh mineral fire-retardant fireproof cable and production method thereof
CN107154278A (en) * 2017-05-09 2017-09-12 成都新三电线厂 Copper core halogen-free type environment-friendly cable
CN109754942A (en) * 2019-01-16 2019-05-14 京仪股份有限公司 A kind of high temperature resistant gold copper cable and its manufacturing method
CN109887654A (en) * 2019-02-12 2019-06-14 宜昌红旗中泰电缆有限公司 Resistance to alternation operating condition power cable

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105551631A (en) * 2016-02-03 2016-05-04 安徽瑞昊缆业有限公司 Multi-core industrial cable
CN105741935A (en) * 2016-02-03 2016-07-06 安徽长风电缆集团有限公司 Multi-core pressure-proof cable
CN106298021A (en) * 2016-10-27 2017-01-04 河北华伦线缆有限公司 Mesohigh mineral fire-retardant fireproof cable and production method thereof
CN107154278A (en) * 2017-05-09 2017-09-12 成都新三电线厂 Copper core halogen-free type environment-friendly cable
CN109754942A (en) * 2019-01-16 2019-05-14 京仪股份有限公司 A kind of high temperature resistant gold copper cable and its manufacturing method
CN109887654A (en) * 2019-02-12 2019-06-14 宜昌红旗中泰电缆有限公司 Resistance to alternation operating condition power cable

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