CN202584757U - Highly flame-retardant fireproof symmetrical cable - Google Patents
Highly flame-retardant fireproof symmetrical cable Download PDFInfo
- Publication number
- CN202584757U CN202584757U CN 201220090031 CN201220090031U CN202584757U CN 202584757 U CN202584757 U CN 202584757U CN 201220090031 CN201220090031 CN 201220090031 CN 201220090031 U CN201220090031 U CN 201220090031U CN 202584757 U CN202584757 U CN 202584757U
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- China
- Prior art keywords
- copper wire
- copper
- coated
- cable
- twisted
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Communication Cables (AREA)
Abstract
The utility model discloses a highly flame-retardant fireproof symmetrical cable. The cable comprises four twisted wire units. A mica composite band is wound outside the four twisted wire units. A copper wire braided layer is wrapped outside the mica composite band. A low-smoke halogen-free sheath layer is wrapped outside the copper wire braided layer. A copper wire serving as a drain wire is positioned between the mica composite band and the copper wire braided layer. Each twisted wire unit is intertwisted by four twisted wires. A tin layer is coated outside the copper wire. The copper wire braided layer is braided by 12 strands of tin-coated copper wires. Each tin-coated copper wire is composed of four tin-coated copper wires. The symmetrical cable of the utility model enables the transmission quality to be improved, enables the flame-retardant fireproof performance and the same directness of the cable to be improved to the maximum, helps to minimize external electromagnetic interference and digital transmission or the like, and allows a line effective transmission distance to be expanded to a certain degree.
Description
Technical field
The utility model relates to a kind of innings and uses symmetrical cable, relates in particular to a kind of high flame retardant fire-type symmetrical cable.
Background technology
The disaster that fire brings to the mankind is heavy, and loss is huge, and along with economic development and urban construction and development, fire damage is in rising trend, therefore all the control of fire is very paid attention to both at home and abroad.Cable is as one of the important generation source of fire and propagating source; Because producing in a large number, toxic and harmful causes the personnel death during its cable fire; Equipment is undermined the harm that personnel can not in time be withdrawn owing to smog, has more and more seriously influenced the generation of disaster.
Fast development along with contemporary program controlled switch technology; Require that the programmed communication circuit is transmitting digitized, high power capacity and wide band trend is more and more obvious; And the optimization along with system equipment increases between programme-controlled exchange district or exchange; The also corresponding aggravation of electromagnetic interference that circuit is caused, and then require this type of cable product to have the characteristic of broadband and electromagnetic compatibility.Present existing office is with the technology of symmetrical cable; Generally be to be coated on uniformly on single core copper conductor with high speed insulated type polyethylene; Carry out pair twist through pair twist equipment, use insulation PE polyester belt to coat many pair twists then, use polyvinylchloride to carry out sheath at last and extrude line; This kind structure is unfavorable for the generation source of fire and the control of propagating source, and transmission bandwidth is very narrow.
Summary of the invention
The utility model provides a kind of high flame retardant fire-type symmetrical cable; This symmetrical cable has improved signal transmission quality, has improved the fire-retardant fireproof property of cable and alleviate purposes such as outside electromagnetic interference and Digital Transmission with the tropism to the full extent, and the circuit effective propagation path also obtains certain expansion.
For achieving the above object; The technical scheme that the utility model adopts is: a kind of high flame retardant fire-type symmetrical cable; Comprise: four twisted wire unit, a mica composite band is wrapped in these four twisted wire unit outer surfaces, and a copper wire braid is coated on said mica composite band outer surface; One low smoke and zero halogen restrictive coating is coated on said copper wire braid outer surface, one as the copper cash of drain wire between said mica composite band and copper wire braid.
It is following that technique scheme is further improved technical scheme:
1. in the such scheme, said twisted wire unit is formed by four twisted wire strands.
2. in the such scheme, said copper cash outer surface is coated with the tin layer.
3. in the such scheme, said copper wire braid is formed by 12 bursts of tinned wird braidings, and said per share tinned wird is made up of four tinned copper wires.
Because the technique scheme utilization, the utility model compared with prior art has advantage:
The utility model high flame retardant fire-type symmetrical cable has improved signal transmission quality, has improved the fire-retardant fireproof property of cable and alleviate purposes such as outside electromagnetic interference and Digital Transmission with the tropism to the full extent, and the circuit effective propagation path also obtains certain expansion.
Description of drawings
Accompanying drawing 1 is the utility model high flame retardant fire-type symmetrical cable structural representation.
In the above accompanying drawing: 1, twisted wire unit; 2, mica composite band; 3, copper wire braid; 4, low smoke and zero halogen restrictive coating; 5, copper cash; 6, twisted wire is right; 7, tin layer; 8, tinned wird.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described:
Embodiment: a kind of high flame retardant fire-type symmetrical cable; Comprise: four twisted wire unit 1; One mica composite band 2 is wrapped in these four twisted wire unit 1 outer surfaces; One copper wire braid 3 is coated on said mica composite band 2 outer surfaces, and a low smoke and zero halogen restrictive coating 4 is coated on said copper wire braid 3 outer surfaces, one as the copper cash 5 of drain wire between said mica composite band 2 and copper wire braid 3.
Above-mentioned twisted wire unit 1 by four twisted wires to 6 stranded formation.
Above-mentioned copper cash 5 outer surfaces are coated with tin layer 7.
Above-mentioned copper wire braid 3 is formed by 8 braidings of 12 strands of tinned wirds, and said per share tinned wird 8 is made up of four tinned copper wires, copper wire braid 3, and the tin-coated copper single line must not reveal copper, and tin coating must not have list edge, tin-coated copper single line non-oxidation, pit; Above tincopper fuse wire braided armor quality requirement: the stranded conductor structure should be closely, no loose, and braid should be even, and the surface should be smooth.Braid does not allow integral body to continue, and strand can weld or peg graft.Joint should be pruned smooth.
Above-mentioned mica composite band technical indicator:
Be suitable for fire-resistant scope: 800～1000 ℃;
Tensile strength: >=75N/cm;
Dielectric strength: >=9.5Kv/mm;
In the cable production process, material, equipment, frock etc. are carried out science, reasonably design and control, coat becoming core to carry out mica aluminium foil composite band, and use the zinc-plated braided wires of multiply to weave.
It is that 38% low smoke and zero halogen protective cover material carries out sheath that total braid cable core is used oxygen index, and the insulation shrinkage test :≤5% (treatment temperature: 232 ± 2 ℃, handled 1 hour), the detection of product: the electric property to product detects evaluation.Product is monitored in the application system running status.
When adopting above-mentioned high flame retardant fire-type symmetrical cable, improved signal transmission quality, improved the fire-retardant fireproof property of cable and alleviate purposes such as outside electromagnetic interference and Digital Transmission with the tropism to the full extent, the circuit effective propagation path also obtains certain expansion.
The foregoing description only is the technical conceive and the characteristics of explanation the utility model, and its purpose is to let the personage who is familiar with this technology can understand content of the utility model and enforcement according to this, can not limit the protection range of the utility model with this.All equivalences of being done according to the utility model spirit change or modify, and all should be encompassed within the protection range of the utility model.
Claims (4)
1. high flame retardant fire-type symmetrical cable; It is characterized in that: comprising: four twisted wire unit (1); One mica composite band (2) is wrapped in this four twisted wire unit (1) outer surface; One copper wire braid (3) is coated on said mica composite band (2) outer surface, and a low smoke and zero halogen restrictive coating (4) is coated on said copper wire braid (3) outer surface, and a copper cash as drain wire (5) is positioned between said mica composite band (2) and the copper wire braid (3).
2. symmetrical cable according to claim 1 is characterized in that: said twisted wire unit (1) is formed (6) are stranded by four twisted wires.
3. symmetrical cable according to claim 1 is characterized in that: said copper cash (5) outer surface is coated with tin layer (7).
4. symmetrical cable according to claim 1 is characterized in that: said copper wire braid (3) is formed by 12 strands of tinned wirds (8) braiding, and said per share tinned wird (8) is made up of four tinned copper wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220090031 CN202584757U (en) | 2012-03-12 | 2012-03-12 | Highly flame-retardant fireproof symmetrical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220090031 CN202584757U (en) | 2012-03-12 | 2012-03-12 | Highly flame-retardant fireproof symmetrical cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202584757U true CN202584757U (en) | 2012-12-05 |
Family
ID=47254145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220090031 Expired - Fee Related CN202584757U (en) | 2012-03-12 | 2012-03-12 | Highly flame-retardant fireproof symmetrical cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202584757U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105374419A (en) * | 2015-12-08 | 2016-03-02 | 无锡江南电缆有限公司 | Power control composite braided shielding fireproof flexible cable for city track traffic |
-
2012
- 2012-03-12 CN CN 201220090031 patent/CN202584757U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105374419A (en) * | 2015-12-08 | 2016-03-02 | 无锡江南电缆有限公司 | Power control composite braided shielding fireproof flexible cable for city track traffic |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20150312 |
|
| EXPY | Termination of patent right or utility model |