CN104282368A - Multifunctional isolation-type inflaming-retarding and fire-proof cable - Google Patents
Multifunctional isolation-type inflaming-retarding and fire-proof cable Download PDFInfo
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- CN104282368A CN104282368A CN201310283223.9A CN201310283223A CN104282368A CN 104282368 A CN104282368 A CN 104282368A CN 201310283223 A CN201310283223 A CN 201310283223A CN 104282368 A CN104282368 A CN 104282368A
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Abstract
The invention discloses an isolation-type inflaming-retarding and fire-proof cable. The isolation-type inflaming-retarding and fire-proof cable comprises one or more insulation cable core, a metal pipe and a protection layer. The insulation cable cores are located inside the metal pipe, the space between the insulation cable cores and the metal pipe is filled with an inflaming-retarding polymer filling layer, and the inflaming-retarding polymer filling layer is made of non-crosslinking polymers; the protection layer is arranged outside the metal pipe in a wrapping mode. The isolation-type inflaming-retarding and fire-proof cable is high in non-inflammability and safety, is not prone to being burnt in a fire or at high temperature and can avoid electric shock; in addition, the isolation-type inflaming-retarding and fire-proof cable is small in occupied space, meanwhile, has good defensive performance, can resist water, mice, ants and stray currents, and has compression resistance and interference resistance.
Description
Technical field
The present invention relates to field of cables, particularly relate to a kind of isolated form flame resistant cable.
Background technology
Along with the raising to urban safety sexual needs, the fire-retardant and fire-resistant main flow model having become cable product.The flame-retarded technology of current cable is by adding Halogen or halogen-free flame retardants in cable plastics sheath and insulation, to reach the object suppressing its burning, and fire-resisting cable is the introducing by high-temperature insulation material, such as mica tape and crosslinked polyetylene insulated combination realize.
There is following defect in the flame resistant cable of said structure:
1) add plastic insulation and the sheath of halogen-free flame retardants, its mechanical performance, water permeability and electric insulating quality all have obvious decline.For ensureing that cable has enough electrical strengths, usual fire retardant adds only to be implemented in sheath, insulation is still the crosslinked polyethylene of " pure ", the fire retardancy of halogen-free flame-retardant cable in flame of this spline structure is limited, although its reason is that fire-retardant inner sheath prolongs combustion and is suppressed, but sheath can split very soon under flame condition, the tongues of fire are by insulating body in the air for direct projection, once the crosslinked polyethylene (46MJ/kg of high heating value, kerosene is 44MJ/kg) ignited, the flame-retarding characteristic of cable will not exist, high heating value will cause high-temperature, high-temperature causes the oxygen index of burned material sharply to decline, more material is made promptly to participate in the reaction of hot oxygen, go round and begin again till burnouting.
2) insulation of organic type NH fire-resisting cable is made up of the flammable crosslinked polyethylene combination of resistant to elevated temperatures mica tape and non-refractory, when normality, cross-linked polyethylene layer is born the responsibility protection against the tide, the dominant role of sealing and electric insulation, and meet fire by very fast ablated charing, now " important task " of electric insulation will be takeed on by mica tape one and provoke, if meet fire-fighting water spray, current can invade mica layer fast, cause phase fault and threaten rescue personnel's life, just because of this, in the metal tube that organic type NH fire-resisting cable must penetrate sealing in laying or can (high rule and people's rule in equal clear stipulaties), not only add comprehensive method of investment expense but also greatly reduce cable transmission capacity (15-20%), it is exactly more than the state of the art of current 0.6/1kV level flame resistant cable.
Summary of the invention
The technical problem to be solved in the present invention is the cable fire poor-performing in order to overcome prior art, easily causes short circuit phenomenon again thus causes the defect of cable security hydraulic performance decline, provide a kind of isolated form flame resistant cable in fire extinguishing procedure.This isolated form flame resistant cable fail safe is high, can avoid the generation of electric shock accidents.
The present invention solves the problems of the technologies described above by the following technical programs.
The invention provides a kind of isolated form flame resistant cable, it comprises insulated wire cores, a metal tube and an overcoat of more than one, described insulated wire cores is positioned at the inside of described metal tube, between described insulated wire cores and described metal tube, be filled with a flame-retardant polymer packing course, the material of this flame-retardant polymer packing course is non-crosslinked type polymer; Described overcoat is wrapped in outside described metal tube.
Wherein, described insulated wire cores is the insulated wire cores that this area routine uses, and the size of described insulated wire cores and specification all can be stock size and the specification of this area.The radical of described insulated wire cores is preferably 3.Described insulated wire cores preferably by a stranded conductor, be extruded in the mica belt outside described stranded conductor and the crosslinking polymer layer be coated on outside described mica belt is formed.The material of described crosslinking polymer layer is preferably cross-linked type polyethylene.
Wherein, described metal tube can be the metal tube that this area routine uses.Described metal tube is preferably aluminum pipe or copper pipe.Described copper pipe is generally adopt welding fabrication.
Wherein, described non-crosslinked type polymer can be the conventional operable non-crosslinked type polymer of field of cables, and being preferably halogen-free type non-crosslinked type polymer, is more preferably halogen-free type non-crosslinked type polyolefin.
Wherein, described overcoat can be the overcoat that this area routine uses.Described overcoat is preferably a fire retardant jacket.The material of described overcoat is preferably low-smoke halide-free fireproof composite polyolefine material.
In the present invention, after described isolated form flame resistant cable meets fire, along with the play liter of the tube wall temperature of metal tube, the material of the flame-retardant polymer packing course of Yin Qinei is the thread-like molecular chain of non-crosslinked type, and its melt temperature, carbonization temperature are all much lower than the insulating polymer of cross-linking type, therefore when high temperature is attacked, leading expansion and cracking, exhaust the residual oxygen in metal tube thus, under making insulated wire cores be in anaerobic, segregate environment, effectively improve the noninflammability of insulated wire cores.Meanwhile, this metal tube is double again in stranding does PE line or protective earthing-neutral conductor, thus reduces the diameter of same specification cable, and can improve the life fail safe in electricity consumption, avoids the generation of electric shock accidents.In addition, described metal tube also improves the effect that cable is externally defended, and reaches waterproof, rat-and-ant proof, anti-scattered strays stream, and resistance to compression, jamproof effect.
On the basis meeting this area general knowledge, above-mentioned each optimum condition, can combination in any, obtains the preferred embodiments of the invention.
Agents useful for same of the present invention and raw material are all commercially.
Positive progressive effect of the present invention is:
The noninflammability of isolated form flame resistant cable of the present invention is high, burning is not easy when meeting fire or high temperature, and fail safe is high, the generation of electric shock accidents can be avoided, in addition, the occupation of land space of this isolated form flame resistant cable is little, has simultaneously and well defends performance, can waterproof, rat-and-ant proof and anti-scattered strays stream, and resistance to compression and anti-interference.
Accompanying drawing explanation
Fig. 1 is the structural representation of the isolated form flame resistant cable of embodiment 1.
Embodiment
Mode below by embodiment further illustrates the present invention, but does not therefore limit the present invention among described scope of embodiments.The experimental technique of unreceipted actual conditions in the following example, conventionally and condition, or selects according to catalogue.
Embodiment 1
Fig. 1 is a kind of structural representation of isolated form flame resistant cable, this isolated form flame resistant cable comprises three insulated wire cores 10, metal tube 5 and a fire retardant jacket 6, those insulated wire cores 10 are positioned at the inside of this metal tube 5, between those insulated wire cores 10 and this metal tubes 5, be filled with a flame-retardant polymer packing course 4, the material of this flame-retardant polymer packing course 4 is non-crosslinked type polyolefin; This fire retardant jacket 6 is wrapped in outside this metal tube 5; Wherein, every root insulated wire cores 10 by a stranded conductor 1, be extruded in the mica belt 2 outside this stranded conductor 1 and the cross-linked type polyethylene layer 3 be coated on outside this mica belt 2 is formed; This metal tube 5 is aluminum pipe or copper pipe.
In the present embodiment, due to the existence of this metal tube 5, the contact of the organic insulation substrate of the hot oxygen of ignition process peripheral and this metal tube 5 inside can be avoided, make to cause mica belt 2 interlayer to move sliding carbon granule punctured and do not existed.In addition, this metal tube 5 doublely can do PE line or the protective earthing-neutral conductor of this isolated form flame resistant cable, thus prevents the generation with the electric shock accidents in electric process.
Therefore, the isolated form flame resistant cable of the present embodiment 1 is when running into fire compared with existing fire-resisting cable, along with the tube wall temperature play of metal tube 5 rises, the non-crosslinked type polyolefin of metal tube 5 inside expands and cracking at first, by the region of the air of metal tube 5 inside to a both sides exclusion formation relative vacuum, thus reach effectively heat insulation and flame retardant effect.
This fire retardant jacket 6 can guarantee that fire-resisting cable remains rated voltage in 90 minutes that test fire-resistant having a try and do not puncture, and it is complete to guarantee that metal tube 5 is in a fire all the time.
In addition, because isolated form flame resistant cable of the present invention self is with metal tube 5, thus breaks away from traditional NH type cable must enter the defect of groove by poling separately in laying, reduced the integrated cost of cable, improve its radiating effect simultaneously.Again due to the existence of metal tube 5, cable insulation is made to be in anaerobic condition for a long time, so the expected value of its thermal lifetime increases to some extent by than traditional cable.
Claims (8)
1. an isolated form flame resistant cable, it is characterized in that, it comprises insulated wire cores, a metal tube and an overcoat of more than one, described insulated wire cores is positioned at the inside of described metal tube, between described insulated wire cores and described metal tube, be filled with a flame-retardant polymer packing course, the material of this flame-retardant polymer packing course is non-crosslinked type polymer; Described overcoat is wrapped in outside described metal tube.
2. isolated form flame resistant cable as claimed in claim 1, it is characterized in that, the radical of described insulated wire cores is 3; Described insulated wire cores by a stranded conductor, be extruded in the mica belt outside described stranded conductor and the crosslinking polymer layer be coated on outside described mica belt is formed.
3. isolated form flame resistant cable as claimed in claim 2, it is characterized in that, the material of described crosslinking polymer layer is cross-linked type polyethylene.
4. isolated form flame resistant cable as claimed in claim 1, it is characterized in that, described metal tube is aluminum pipe or copper pipe.
5. isolated form flame resistant cable as claimed in claim 1, it is characterized in that, described non-crosslinked type polymer is halogen-free type non-crosslinked type polymer.
6. isolated form flame resistant cable as claimed in claim 5, it is characterized in that, described non-crosslinked type polymer is halogen-free type non-crosslinked type polyolefin.
7. isolated form flame resistant cable as claimed in claim 1, it is characterized in that, described overcoat is a fire retardant jacket.
8. isolated form flame resistant cable as claimed in claim 1, it is characterized in that, the material of described overcoat is low-smoke halide-free fireproof composite polyolefine material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310283223.9A CN104282368A (en) | 2013-07-05 | 2013-07-05 | Multifunctional isolation-type inflaming-retarding and fire-proof cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310283223.9A CN104282368A (en) | 2013-07-05 | 2013-07-05 | Multifunctional isolation-type inflaming-retarding and fire-proof cable |
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| Publication Number | Publication Date |
|---|---|
| CN104282368A true CN104282368A (en) | 2015-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310283223.9A Pending CN104282368A (en) | 2013-07-05 | 2013-07-05 | Multifunctional isolation-type inflaming-retarding and fire-proof cable |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202632869U (en) * | 2012-06-27 | 2012-12-26 | 安徽龙庵电缆集团有限公司 | Aluminum-core low-smoke halogen-free flame-retardant medium-voltage flame-resistant cable |
| CN202677906U (en) * | 2012-06-26 | 2013-01-16 | 常州八益电缆股份有限公司 | Low-smoke, halogen-free and flame-retardant type fire-resistant cable for novel nuclear power station |
| CN102956306A (en) * | 2011-08-26 | 2013-03-06 | 上海市高桥电缆厂有限公司 | Isolated flame-retardant fire-resisting cable |
| CN203397739U (en) * | 2013-07-05 | 2014-01-15 | 上海市高桥电缆厂有限公司 | Multifunctional isolation type flame resistant cable |
-
2013
- 2013-07-05 CN CN201310283223.9A patent/CN104282368A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102956306A (en) * | 2011-08-26 | 2013-03-06 | 上海市高桥电缆厂有限公司 | Isolated flame-retardant fire-resisting cable |
| CN202677906U (en) * | 2012-06-26 | 2013-01-16 | 常州八益电缆股份有限公司 | Low-smoke, halogen-free and flame-retardant type fire-resistant cable for novel nuclear power station |
| CN202632869U (en) * | 2012-06-27 | 2012-12-26 | 安徽龙庵电缆集团有限公司 | Aluminum-core low-smoke halogen-free flame-retardant medium-voltage flame-resistant cable |
| CN203397739U (en) * | 2013-07-05 | 2014-01-15 | 上海市高桥电缆厂有限公司 | Multifunctional isolation type flame resistant cable |
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Application publication date: 20150114 |
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