CN202217530U - Isolated-type flame-retardant fireproof cable - Google Patents
Isolated-type flame-retardant fireproof cable Download PDFInfo
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- CN202217530U CN202217530U CN2011203167732U CN201120316773U CN202217530U CN 202217530 U CN202217530 U CN 202217530U CN 2011203167732 U CN2011203167732 U CN 2011203167732U CN 201120316773 U CN201120316773 U CN 201120316773U CN 202217530 U CN202217530 U CN 202217530U
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- flame
- cable
- retardant
- fire
- metal tube
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Abstract
The utility model discloses an isolated-type flame-retardant fireproof cable, which comprises an insulated core, a flame-retardant polymer layer is filled outside the insulated core, the flame-retardant polymer layer is coated by a metal pipe outside, and the metal pipe is coated by a protective layer at the periphery. The flame-retardant polymer layer adopts non-cross-linked polymer, and the cable does not contain Mica layer wrapping. When the isolated-type flame-retardant fireproof cable is heated by fire, along with the sharp increase of the wall temperature of the metal pipe, pyrolysis and carbonization happen before hand in a high-temperature environment because the inside flame-retardant polymer is a non-cross-linked thread-like molecular chain, and the melt temperature and the carbonizing temperature are much lower than those of cross-linked flame-retardant polymer; and since pyrolysis and carbonization uses up residue oxygen in the metal pipe, the finished cable is in an isolated oxygen-free environment, thus the flame resistance of the cable is effectively improved.
Description
Technical field
The utility model relates to a kind of cable, particularly relates to a kind of isolated form flame resistant cable.
Background technology
Along with 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 through in cable plastics sheath and insulation, adding Halogen or halogen-free flame retardants at present; To reach the purpose that suppresses its burning; And fire-resisting cable is the introducing through 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, the fire retardant interpolation is only implemented in sheath usually, and 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, 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 of high heating value (46MJ/kg, kerosene are 44MJ/kg) is ignited, the flame-retarding characteristic of cable will not exist; High heating value will cause high-temperature; High-temperature causes sharply being descended by the oxygen index of incendiary material, makes more material promptly participate in hot oxygen reaction, goes round and begins again 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 dominant role of protection against the tide, sealing and electric insulation of bearing the responsibility when normality; And meet fire with very fast ablated charing, will provoke by mica tape one shoulder this moment " important task " of electric insulation, 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 in the metal tube or can of sealing (high rule, people's rule all clearly regulation) in laying; Not only having increased comprehensive method of investment expense but also reduced cable transmission capacity (15-20%) greatly, more than is exactly the state of the art of present 0.6/1kV level flame resistant cable.
The utility model content
The technical problem that the utility model will solve be for the cable fire resistance that overcomes prior art relatively poor, thereby in fire extinguishing procedure, cause short circuit phenomenon to cause the defective of cable security decreased performance again easily, a kind of isolated form flame resistant cable is provided.
The utility model solves above-mentioned technical problem through following technical proposals:
A kind of isolated form flame resistant cable; It comprises insulated wire cores, and its characteristics are that this insulated wire cores is filled one deck flame retardant polymer layer outward; This flame retardant polymer layer outerwrap one metal tube; Overcoat has been wrapped up in the periphery of this metal tube, and wherein said flame retardant polymer layer is a 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 a 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.
In the utility model, but above-mentioned optimum condition combination in any on the basis that meets this area general knowledge promptly gets each preferred embodiment of the utility model.
The positive progressive effect of the utility model is: the isolated form flame resistant cable of the utility model is met the fire back and is risen along with the metal pipe-wall temperature is acute; The flame-retardant polymer 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, so when high temperature is attacked; Cracking and charing in advance; Exhaust the residual oxygen in the metal tube thus, making insulation be in anaerobic, under the segregate environment, effectively improved 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, protection against rodents ant, 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 the utility model one preferred embodiment.
Embodiment
Provide the utility model preferred embodiment below in conjunction with accompanying drawing, to specify the technical scheme of the utility model.
As shown in Figure 1, the composition of the isolated form flame resistant cable of present embodiment comprises three by conductor 1 and be extruded in the insulated wire cores that the outer crosslinked polyetylene insulated layer 2 of conductor 1 constitutes.Be provided with the flame-retardant polymer packing course 3 of non-crosslinked type in the outside of the stranding that constitutes 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 being provided with a metal tube 4 in the periphery 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 does not have seam, can avoid the air communication in extraneous air and the metal tube 4, metal tube 4 inside are intercepted out with the outside fully.
In addition, this metal tube 4 can doublely be done the 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; The fire-resisting cable of comparing present embodiment with existing fire-resisting cable is when running into fire; Rise along with the tube wall temperature of metal tube 4 is acute; Cracking and carbonization reaction take place in metal tube 4 inner non-crosslinked type polyolefin at first, metal tube 4 inner air reactions are fallen forming 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 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 these fire-retardant inner sheath 5 outer steel armours 6 and is wrapped in the fire-retardant oversheath 7 outside this steel armour 6 with one decks.Wherein this steel armour 6 can be provided with through the mode of vertical bag of embossing or chain vertical bag.
In addition because this isolated form flame resistant cable self just has metal tube and steel armour, thereby broken away from traditional NH type cable in laying separately poling go into the defective of groove, reduced the integrated cost of cable, improved its radiating effect simultaneously.Again because the existence of metal tube makes cable insulation be in anaerobic condition for a long time, Gu the expected value of its thermal lifetime will increase than traditional cable to some extent.
The isolated form flame resistant cable of the utility model has been abandoned the mica layer in the traditional cable fully, has not only improved the reliability that power has reduced cost but also helped the cable electrical performance.
Though more than described the embodiment of the utility model, it will be understood by those of skill in the art that these only illustrate, the protection range of the utility model is limited appended claims.Those skilled in the art can make numerous variations or modification to these execution modes under the prerequisite of principle that does not deviate from the utility model and essence, but these changes and modification all fall into the protection range of the utility model.
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 outerwrap one metal tube; Overcoat has been wrapped up in the periphery of this metal tube, and wherein said flame retardant polymer layer is a 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 a 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 |
|---|---|---|---|
| CN2011203167732U CN202217530U (en) | 2011-08-26 | 2011-08-26 | Isolated-type flame-retardant fireproof cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203167732U CN202217530U (en) | 2011-08-26 | 2011-08-26 | Isolated-type flame-retardant fireproof cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202217530U true CN202217530U (en) | 2012-05-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203167732U Expired - Fee Related CN202217530U (en) | 2011-08-26 | 2011-08-26 | Isolated-type flame-retardant fireproof cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202217530U (en) |
Cited By (1)
| 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 |
-
2011
- 2011-08-26 CN CN2011203167732U patent/CN202217530U/en not_active Expired - Fee Related
Cited By (1)
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191231 Address after: 233000 Anhui province Bengbu City Longxing Road No. 555 Patentee after: Gaoqiao Fire Protection Technology Co., Ltd Address before: 201200, No. 528 Yang Gao Bei Road, Gaoqiao Town, Shanghai, Pudong New Area Patentee before: Shanghai Gaoqiao Cable Factory Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120509 Termination date: 20200826 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |