CN202976920U - Fire-resistant stranded multi-core branch cable - Google Patents
Fire-resistant stranded multi-core branch cable Download PDFInfo
- Publication number
- CN202976920U CN202976920U CN 201220695267 CN201220695267U CN202976920U CN 202976920 U CN202976920 U CN 202976920U CN 201220695267 CN201220695267 CN 201220695267 CN 201220695267 U CN201220695267 U CN 201220695267U CN 202976920 U CN202976920 U CN 202976920U
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- branch cable
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Abstract
The utility model discloses a fire-resistant stranded multi-core branch cable which is formed by stranding a plurality of fire-resistant single-core branch cables. Joint positions are at the same height or are crossed with one another. The fire-resistant single-core branch cable comprises a main cable, a branch cable and a branch joint connecting the main cable and the branch cable. The structure of the main cable and the branch cable comprises a central conductor, a first insulating layer and a restrictive coating. The first insulating layer and the restrictive coating are sleeved on the conductor tightly. A connecting joint is arranged in the branch joint, and is used for connecting a main cable conductor and a branch cable conductor. The connecting joint is molded with a second insulating layer in an injection mode after pressure welding. The stranded multi-core branch cable is stable in structure, good in fire resistance, high in insulating quality, safe and reliable.
Description
Technical field
The utility model relates to the electric wire field, specifically refers to a kind of fire-resistant coil buckling type multi-core branch cable.
Background technology
Along with taking place frequently of fire incident, people constantly deepen electric wire fire risk understanding, and relevant department is also more and more higher to the requirement of the performances such as electric wire fire protection flame retarding.Characteristics such as spreading fast, the difficulty of putting out a fire to save life and property because cable fire has, produce secondary harm, recovery time is long can be brought huge loss to national economy and the people's lives and properties.Therefore people have proposed harsher service conditions to fire performance, the security reliability of electric wire.As fire prevention, explosion-proof, overload capacity is strong, long service life, under Fire Conditions, Fire lift, fire pump need keep the normal operation in certain hour, cable is the low-smoke low-halogen low toxicity after burning, even smokeless halogen-free is nontoxic waits specific (special) requirements.The cable fire-proof measure is to reduce the important means that ignition of cable prolongs combustion, crucial relying mainly on prevention, and all kinds of fire-resisting cables, fireproof cable are used widely.
Branch cable has obtained propagation and employment widely because have the advantages such as power supply safety is reliable, use cost is low, installation is simple, environmental requirement is low, non-maintaining.Be widely used in the distribution systems such as dwelling house, office tower, tunnel, hotel, hospital, market due to branch cable, with backbone, illuminator such as street lamp power supply, road lamp power supply, highway, bridge, tunnel and the airfield runway etc. of branch line requirement are arranged, so branch cable often has also and the fireproof needs fire-resistant.
Chinese patent " CN201120065443.0 ", " CN200920085322.5 ", " CN200620152360.4 ", disclosed fire-resistant branch cables such as " CN200820230319.3 ", all to adopt at the main cable conductor, on branch cable conductor and branch's connector branch joint, the mode of wrapped mica tape plays fire-resistant effect, the fire-resisting cable of Mica tape, during cable fire, the hardening of mica sintering can continue to play the effect of insulation, thereby reach fire-resistant effect, but, no matter be synthetic mica tape, gold mica tape, white clouds master tape or other mica tapes all have following major defect: (1) mica water absorption is strong, easily lost efficacy after suction, (2) processing method of mica tape is to utilize adhesive to paste mica powder, and is therefore harder, and in wrapped and subsequently processing and use procedure, mica powder very easily peels off, and peels off as long as exist the function of namely having lost insulation, does not reach instructions for use, also be difficult for simultaneously wrapped smooth, even subsides, tight, easily wrinkling, particularly small bore flexible conductor difficulty of processing is larger, (3) after meeting the fire burning, after the organic material macromolecular material is burnt mistake, can cause the cable internal structure loosening, cause the fragmentation of mica insulation layer to come off, the effect of especially all kinds of vibrations, thereby the forfeiture insulation property, can't continue to remain on the function of supplying power in flame, so its application is subject to certain limitation.
Also there are other mineral insulation bands of use to substitute mica tape in prior art, but no matter be which kind of fire-resistant band, on branch's connector branch joint, wrapped band is all that employing is artificial manual wrapped, wrapped not tight, easily produce the bottom pour ladle phenomenon, particularly in injection moulding mold pressing materials process, and the flame retardant coating between main cable, branch cable also easily produces and disconnects, thereby do not have insulating effect when the cable breaking out of fire.
The utility model content
The technical problems to be solved in the utility model is to provide that a kind of Stability Analysis of Structures, fireproof＝fire-proof are good, good insulating, safe and reliable coil buckling type multi-core branch cable.
A kind of fire-resistant coil buckling type multi-core branch cable described in the utility model is formed by the coil buckling of many fire safe type list core branch cables; Joint location is positioned at sustained height or mutually intersects.Its fire safe type list core branch cable structure is, being connected the branch joint of two cables by leader cable, branch cable and connection forms, the first insulating barrier and restrictive coating that conductor in the middle of the structure of leader cable and branch cable comprises is outer with being extruded in conductor, be provided with the jointing that leader cable conductor and branch cable conductor are linked together in branch joint, be injected with the second insulating barrier after described jointing crimping.
The beneficial effects of the utility model are:
Compared with prior art, the main improvement of fire safe type list core branch cable described in the utility model is to substitute wrapped mica tape and insulating barrier with the ceramic silicone rubber insulation layer that extrudes, can not occur that mica suction was lost efficacy, peeled off, wrapped out-of-flatness, small bore flexible conductor difficulty of processing are large, shortcomings such as the insulating barrier fragmentation comes off after burning, the problems such as the easy disconnection of wrapped other flame retardant coating out-of-flatnesses also can not occur.Stability Analysis of Structures, insulation property are reliable, and fire resistance is excellent, and is safe and reliable good.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of fire safe type list core branch cable in the utility model.
Embodiment:
As shown in Figure 1, a kind of fire-resistant coil buckling type multi-core branch cable described in the utility model is formed by the coil buckling of many fire safe type list core branch cables; Joint location is positioned at sustained height or mutually intersects.
As shown in Figure 2, described fire safe type list core branch cable, its structure is, formed by leader cable 1, branch cable 2 and the branch joint 3 that is connected aforementioned two cables, the first insulating barrier 5 and restrictive coating 6 that conductor 4 in the middle of the structure of leader cable 1 and branch cable 2 comprises is outer with being extruded in conductor 4, be provided with the jointing 7 that leader cable conductor and branch cable conductor are linked together in branch joint 3, be injected with the second insulating barrier 8 after described jointing crimping.
The utility model provides a kind of fire-resistant coil buckling type multi-core branch cable version and implementation method; the above is only preferred implementation method of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvement, these improvement also should be considered as protection range of the present utility model.
Claims (2)
1. a fire-resistant coil buckling type multi-core branch cable, is characterized in that: formed by the coil buckling of many fire safe type list core branch cables; Joint location is positioned at sustained height or mutually intersects.
2. fire-resistant coil buckling type multi-core branch cable according to claim 1, it is characterized in that: described fire safe type list core branch cable, its structure is, by leader cable (1), branch cable (2) forms with the branch joint that is connected aforementioned two cables (3), the structure of leader cable (1) and branch cable (2) comprises middle conductor (4) and is extruded in conductor (4) outer the first insulating barrier (5) and restrictive coating (6), be provided with the jointing (7) that leader cable conductor and branch cable conductor are linked together in branch joint (3), be injected with the second insulating barrier (8) after described jointing crimping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220695267 CN202976920U (en) | 2012-12-17 | 2012-12-17 | Fire-resistant stranded multi-core branch cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220695267 CN202976920U (en) | 2012-12-17 | 2012-12-17 | Fire-resistant stranded multi-core branch cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202976920U true CN202976920U (en) | 2013-06-05 |
Family
ID=48517964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220695267 Expired - Lifetime CN202976920U (en) | 2012-12-17 | 2012-12-17 | Fire-resistant stranded multi-core branch cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202976920U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103000271A (en) * | 2012-12-17 | 2013-03-27 | 无锡江南电缆有限公司 | Fire-resistant twisting type multicore branch cable |
-
2012
- 2012-12-17 CN CN 201220695267 patent/CN202976920U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103000271A (en) * | 2012-12-17 | 2013-03-27 | 无锡江南电缆有限公司 | Fire-resistant twisting type multicore branch cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130605 |