CN102956306A - Isolated flame-retardant fire-resisting cable - Google Patents
Isolated flame-retardant fire-resisting cable Download PDFInfo
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- CN102956306A CN102956306A CN2011102492990A CN201110249299A CN102956306A CN 102956306 A CN102956306 A CN 102956306A CN 2011102492990 A CN2011102492990 A CN 2011102492990A CN 201110249299 A CN201110249299 A CN 201110249299A CN 102956306 A CN102956306 A CN 102956306A
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Abstract
The invention discloses an isolated flame-retardant fire-resisting cable which comprises insulating cores. A flame-retardant polymer layer is filled outside the insulating cores. The flame-retardant polymer layer is wrapped with a metal tube which is wrapped with a protective layer. The flame-retardant polymer layer is made of non-crosslinked polymer. The cable comprises no mica wrapping layer. When the isolated flame-retardant fire-resisting cable contacts with flame, with increasing temperature of the wall of the metal tube, flame-retardant polymer in the cable is cracked and carbonized first under high temperature because the flame-retardant polymer with non-crosslinked linear molecular chains is lower than the crosslinked flame-retardant polymer in both melting temperature and carbonization temperature. Therefore, residual oxygen in the metal tube is consumed, the cable is isolated in the oxygen-free environment, and flame resistance of the cable is effectively improved.
Description
Technical field
The present invention relates to a kind of cable, particularly relate to a kind of isolated form flame resistant cable.
Background technology
Along with the raising to the urban safety sexual needs, the fire-retardant and fire-resistant main flow model that has become cable product.The flame-retarded technology of cable is by add Halogen or halogen-free flame retardants in cable plastics sheath and insulation at present, to reach the purpose that suppresses 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 defective in the flame resistant cable of said structure:
1) plastic insulation and the sheath of interpolation halogen-free flame retardants, its mechanical performance, water permeability and electric insulating quality all have obvious decline.For guaranteeing that cable has enough electrical strengths, usually the fire retardant interpolation is only implemented in sheath, insulation still is the crosslinked polyethylene of " pure ", the fire retardancy of the halogen-free flame-retardant cable of this spline structure in flame is limited, although its reason is that fire-retardant inner sheath prolongs combustion and is suppressed, but sheath can split under flame condition very soon, the insulating body that the tongues of fire are in the air with direct projection, in case 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 descend, and makes more material promptly participate in hot oxygen reaction, goes round and begins again until till burnouting.
2) insulation of organic type NH fire-resisting cable is that flammable crosslinked polyethylene by resistant to elevated temperatures mica tape and non-refractory constitutes, the crosslinked polyethylene layer protection against the tide of bearing the responsibility when normality, the dominant role of sealing and electric insulation, and meet fire with very fast ablated charing, " important task " of electric insulation will be provoked by mica tape one shoulder this moment, if meet the fire-fighting water spray, current must be invaded mica layer fast, cause phase fault and threaten rescue personnel's life, just because of this, organic type NH fire-resisting cable must penetrate (high rule in the metal tube or can of sealing in laying, the people advise equal clear), not only having increased comprehensive method of investment expense but also greatly reduced cable transmission capacity (15-20%), more than is exactly the state of the art of present 0.6/1kV level flame resistant cable.
Summary of the invention
The technical problem to be solved in the present invention is in order to overcome the cable fire poor-performing of prior art, thereby causes easily again short circuit phenomenon to cause the defective of cable security hydraulic performance decline in fire extinguishing procedure, and a kind of isolated form flame resistant cable is provided.
The present invention solves above-mentioned technical problem by following technical proposals:
A kind of isolated form flame resistant cable, it comprises insulated wire cores, its characteristics are, this insulated wire cores is filled one deck flame retardant polymer layer outward, this flame retardant polymer layer outer wrapping one metal tube, overcoat has been wrapped up in the periphery of this metal tube, and wherein said flame retardant polymer layer is non-cross-linked polymer, and this cable not contain mica layer wrapped.
Wherein, this non-cross-linked polymer is the halogen-free type non-cross-linked polymer.
Wherein, this flame-retardant polymer is non-crosslinked type polyolefin.
Wherein, this metal tube is the aluminum pipe of extrusion modling or the copper pipe of welding fabrication.
Wherein, this overcoat comprises the fire-retardant inner sheath that is wrapped in outside this metal tube, is wrapped in the outer steel armour of this fire-retardant inner sheath and one deck and is wrapped in the outer fire-retardant oversheath of this steel armour.
Among the present invention, but above-mentioned optimum condition combination in any on the basis that meets this area general knowledge namely gets each preferred embodiment of the present invention.
Positive progressive effect of the present invention is: isolated form flame resistant cable of the present invention rises along with the metal pipe-wall temperature is acute after meeting fire, the flame-retardant polymer of Yin Qinei is the thread-like molecular chain of non-crosslinked type, its melt temperature, carbonization temperature are all much lower than the insulating polymer of cross-linking type, so when high temperature is attacked, in advance cracking and charing, exhaust thus the residual oxygen in the metal tube, making insulation be in anaerobic, under the segregate environment, Effective Raise the fire resistance of insulation.Simultaneously, this metal tube is double again in stranding does PE line or protective earthing-neutral conductor, thereby has dwindled the diameter of same specification cable, and can improve the life fail safe in the electricity consumption, avoids the generation of electric shock accidents.In addition, metal tube has also improved the externally effect of defence of cable, reaches waterproof, rat-and-ant proof, anti-scattered strays stream, and the jamproof effect of resistance to compression.
Description of drawings
Fig. 1 is the structural representation of the isolated form flame resistant cable in a preferred embodiment of the present invention.
Embodiment
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to describe technical scheme of the present invention in detail.
As shown in Figure 1, the composition of the isolated form flame resistant cable of present embodiment comprises three by conductor 1 and is extruded in conductor 1 crosslinked polyetylene insulated layer 2 insulated wire cores that consists of outward.Be provided with the flame-retardant polymer packing course 3 of non-crosslinked type in the outside of the stranding that is consisted of by above-mentioned insulated wire cores.In the present embodiment, what the flame-retardant polymer packing course 3 of this non-crosslinked type adopted is non-cross-linking type polyolefin.And at the outer metal tube 4 that is arranged with of the flame-retardant polymer packing course 3 of non-crosslinked type, this metal tube 4 can adopt the aluminum pipe of extrusion modling or the copper pipe of welding fabrication.Because the surface of this metal tube 4, can be avoided the air communication in extraneous air and the metal tube 4 without seam, metal tube 4 inside are intercepted out fully with the outside.
In addition, this metal tube 4 can doublely be done PE line or the protective earthing-neutral conductor of this fire-resisting cable, thereby prevents the generation with the electric shock accidents in the electric process.
Therefore, compare the fire-resisting cable of present embodiment when running into fire with existing fire-resisting cable, rise along with the tube wall temperature of metal tube 4 is acute, cracking and carbonization reaction occur in the non-crosslinked type polyolefin of metal tube 4 inside at first, the air reaction of metal tube 4 inside is fallen to form a vacuum area, thereby reach effectively heat insulation and flame retardant effect.
And be to guarantee that fire-resisting cable remains rated voltage in 90 minutes that test and do not puncture fire-resistant having a try, and it is intact to guarantee that metal tube 4 is in fire all the time, need to protective layer be set again in the outside of metal tube 4.This protective layer comprises the fire-retardant inner sheath 5 that is wrapped in outside this metal tube 4, is wrapped in this fire-retardant inner sheath 5 steel armour 6 and one decks outward and is wrapped in this steel armour 6 fire-retardant oversheath 7 outward.Wherein this steel armour 6 can arrange by the mode of the vertical bag of embossing or chain vertical bag.
In addition because this isolated form flame resistant cable self is just with metal tube and steel armour, thereby broken away from traditional NH type cable in laying separately poling enter the defective of groove, reduced the integrated cost of cable, improved simultaneously its radiating effect.Again because the existence of metal tube makes cable insulation be in for a long time anaerobic condition, Gu the expected value of its thermal lifetime will increase to some extent than traditional cable.
Isolated form flame resistant cable of the present invention has been abandoned the mica layer in the traditional cable fully, has not only improved the reliability that power has reduced cost but also has been conducive to the cable electrical performance.
Although more than described the specific embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, protection scope of the present invention is limited by appended claims.Those skilled in the art can make various changes or modifications to these execution modes under the prerequisite that does not deviate from principle of the present invention and essence, but these changes and modification all fall into protection scope of the present invention.
Claims (5)
1. isolated form flame resistant cable, it comprises insulated wire cores, it is characterized in that, this insulated wire cores is filled one deck flame retardant polymer layer outward, this flame retardant polymer layer outer wrapping one metal tube, overcoat has been wrapped up in the periphery of this metal tube, and wherein said flame retardant polymer layer is non-cross-linked polymer, and this cable not contain mica layer wrapped.
2. isolated form flame resistant cable as claimed in claim 1 is characterized in that, this non-cross-linked polymer is the halogen-free type non-cross-linked polymer.
3. isolated form flame resistant cable as claimed in claim 2 is characterized in that, this flame-retardant polymer is non-crosslinked type polyolefin.
4. isolated form flame resistant cable as claimed in claim 1 is characterized in that, this metal tube is the aluminum pipe of extrusion modling or the copper pipe of welding fabrication.
5. isolated form flame resistant cable as claimed in claim 1 is characterized in that, this overcoat comprises the fire-retardant inner sheath that is wrapped in outside this metal tube; Be wrapped in the outer steel armour of this fire-retardant inner sheath and one deck and be wrapped in the outer fire-retardant oversheath of this steel armour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102492990A CN102956306A (en) | 2011-08-26 | 2011-08-26 | Isolated flame-retardant fire-resisting cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102492990A CN102956306A (en) | 2011-08-26 | 2011-08-26 | Isolated flame-retardant fire-resisting cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102956306A true CN102956306A (en) | 2013-03-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102492990A Pending CN102956306A (en) | 2011-08-26 | 2011-08-26 | Isolated flame-retardant fire-resisting cable |
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| Country | Link |
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| CN (1) | CN102956306A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104282368A (en) * | 2013-07-05 | 2015-01-14 | 上海市高桥电缆厂有限公司 | Multifunctional isolation-type inflaming-retarding and fire-proof cable |
| CN104505158A (en) * | 2015-01-09 | 2015-04-08 | 四川金正方线缆有限公司 | Isolation type aluminum alloy fire-resistant cable |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201590278U (en) * | 2010-01-06 | 2010-09-22 | 郑州电缆有限公司 | Fire-resisting cable with silicon-rubber organic elastomer |
| CN201707954U (en) * | 2010-06-11 | 2011-01-12 | 上海市高桥电缆厂有限公司 | Fireproof control cable |
| CN201820478U (en) * | 2010-10-13 | 2011-05-04 | 商晓华 | Fire-resistant cable |
| CN201946370U (en) * | 2011-02-17 | 2011-08-24 | 深圳市宏达兴电线电缆发展有限公司 | Fire-resistant type mineral insulated cable |
| CN202217530U (en) * | 2011-08-26 | 2012-05-09 | 上海市高桥电缆厂有限公司 | Isolated-type flame-retardant fireproof cable |
-
2011
- 2011-08-26 CN CN2011102492990A patent/CN102956306A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201590278U (en) * | 2010-01-06 | 2010-09-22 | 郑州电缆有限公司 | Fire-resisting cable with silicon-rubber organic elastomer |
| CN201707954U (en) * | 2010-06-11 | 2011-01-12 | 上海市高桥电缆厂有限公司 | Fireproof control cable |
| CN201820478U (en) * | 2010-10-13 | 2011-05-04 | 商晓华 | Fire-resistant cable |
| CN201946370U (en) * | 2011-02-17 | 2011-08-24 | 深圳市宏达兴电线电缆发展有限公司 | Fire-resistant type mineral insulated cable |
| CN202217530U (en) * | 2011-08-26 | 2012-05-09 | 上海市高桥电缆厂有限公司 | Isolated-type flame-retardant fireproof cable |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104282368A (en) * | 2013-07-05 | 2015-01-14 | 上海市高桥电缆厂有限公司 | Multifunctional isolation-type inflaming-retarding and fire-proof cable |
| CN104505158A (en) * | 2015-01-09 | 2015-04-08 | 四川金正方线缆有限公司 | Isolation type aluminum alloy fire-resistant cable |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130306 |