CN202076030U

CN202076030U - Mineral high-temperature-resistant fire-proof flexible cable

Info

Publication number: CN202076030U
Application number: CN2011201631991U
Authority: CN
Inventors: 刘敏锐
Original assignee: Fuzhou Yongtong Wire & Cable Co Ltd
Current assignee: Fuzhou Yongtong Wire & Cable Co Ltd
Priority date: 2011-05-19
Filing date: 2011-05-19
Publication date: 2011-12-14
Anticipated expiration: 2021-05-19

Abstract

The utility model provides a mineral high-temperature-resistant fire-proof flexible cable. The cable comprises a cable core, an isolating layer and a protective sleeve layer from the inside to the outside. The cable core is formed by stranding an insulated wire core and filling ropes. The insulated wire core comprises a stranded conductor, a fire-proof layer and an insulating layer from the inside to the outside. Therefore, the mineral high-temperature-resistant fire-proof flexible cable not only has excellent low-smoke halogen-free high-temperature-resistant fire-proof performances and safety performance, but also is difficult to absorb damp, and products are simple in structure, high in economical efficiency, easy to mount and distribute and wide in application range. Simultaneously, the structure is improved, using of copper pipes is abandoned, accordingly abundant precious copper resources are saved, and commonweal value is also remarkable.

Description

A kind of mineral fire resistant flexible cable

[technical field]

The utility model relates to a kind of electric wire, particularly a kind of mineral fire resistant flexible cable.

[background technology]

Traditional mineral insulated cable is made up of copper conductor, magnesium oxide insulating barrier, copper pipe restrictive coating, have good fire resistance properties and security performance, but also expose following defective simultaneously: 1, core adopts excellent type solid copper conductor, very hard, make the area of maximum cross-section of single-core cable be generally 400mm ²2, area of section is at 35mm ²And above core, can't realize cableization, be single-core cable, if with the use in parallel of many these single-core cables, the unbalanced problem of the electric parameter between each single-core cable can appear; 3, use magnesium oxide powder to serve as insulating barrier, easily produce the phenomenon of insulating barrier thickness inequality, technology has the mistake insulating barrier just can puncture slightly, and its rated voltage is only up to 450～750V; 4, adopt copper pipe to make restrictive coating, because drawing copper tubes technology is limit and made that single continuous length is limited, 400mm ²Heavy in section single-core cable no longer than 60 meters, in the process of installing, need constantly to use joint, increased material and cost of labor, and needed butt joint place to do special processing, laid installation effectiveness and be difficult to raising to guarantee still to keep energising after bearing water under the flame sprays; 5, (area of section is less than 35mm owing to the core that the small bore area is only arranged ²) can cableization, so cableization and product specification be restricted, application is narrower.

[utility model content]

The technical problems to be solved in the utility model, be to provide a kind of mineral fire resistant flexible cable, it is little that it has solved in the prior art single-core cable cross section, and the heavy in section single-core cable can not cableization, the insulating barrier rated voltage is low, and installation process has the problems such as limited amount of joint and cable core.

The utility model is achieved in that a kind of mineral fire resistant flexible cable, and described cable comprises from the inside to the outside successively: cable core, separator, restrictive coating; Described cable core is by insulated wire cores and gasket for packing is stranded forms; Described insulated wire cores comprises from the inside to the outside successively: stranded conductor, fireprotection layer, insulating barrier.Described fireprotection layer is the mica tape fireprotection layer, described insulating barrier adopts low smoke and zero halogen cross-linking flame-retardant polyolefin insulation material, described gasket for packing is the flame-proof glass fibre rope, and described separator is one to be the fire lagging of base-material with mineral, and described restrictive coating adopts low-smoke and halogen-free flame retardant polyolefin jacket material.

Further, described fireprotection layer is two-layer.

Advantage of the present utility model is:

It is that core makes cable more soft that the utility model adopts stranded conductor, and the maximum cross-section area can reach 630mm ²But and the equal cableization of the core of arbitrary section, but cableization 96 cores have at most covered the demand of the building cable of all sizes such as power cable, control cable.Insulating barrier adopts low smoke and zero halogen cross-linking flame-retardant polyolefin insulation material, and its rated voltage can reach 600～1000V, has reduced the surge voltage that the frequent starting because of inductance, frequency conversion electrical equipment causes simultaneously, and the corresponding line system that makes improves useful life greatly.Restrictive coating adopts low-smoke and halogen-free flame retardant polyolefin jacket material, broken away from the restriction of copper sheath to unit cable length, simultaneously because the advantage of the utility model cable flexibility, can realize producing according to the customer requirements fixed length, reduced the joint cost, realize whole consistency of circuit, made things convenient for the installation of cable to lay.

Therefore, the utility model not only possesses outstanding low smoke and zero halogen fire resistant performance and security performance and is difficult for the moisture absorption, and product structure is simple and economy is high, is easy to install lay, and application is extensive.Owing to improved structure, cancelled the copper pipe use simultaneously, corresponding copper resource of having saved a large amount of preciousnesses, public good is worth also very remarkable.

[description of drawings]

In conjunction with the embodiments the utility model is further described with reference to the accompanying drawings.

Fig. 1 is the structural representation of a kind of mineral fire resistant of the utility model flexible cable.

[embodiment]

See also shown in Figure 1ly, embodiment of the present utility model is described in detail.

A kind of mineral fire resistant flexible cable, described cable comprises from the inside to the outside successively: cable core 1, separator 2, restrictive coating 3; Described cable core 1 is by insulated wire cores 11 and gasket for packing 12 stranded forming; Described insulated wire cores 11 comprises from the inside to the outside successively: stranded conductor 111, fireprotection layer 112, insulating barrier 113.

Concrete operation method of the present utility model: wrapped two-layer fireprotection layer 112 on described stranded conductor 111, on described fireprotection layer 112, extrude a layer insulating 113 then and make described insulated wire cores 11, described insulated wire cores 11 is twisted into described cable core 1 with gasket for packing 12, extrude one deck separator 2 in the periphery of described cable core 1 then, extrude one deck restrictive coating 3 at last again.

In the present embodiment, described gasket for packing 12 is the flame-proof glass fibre rope.Described separator 2 is one to be the fire lagging of base-material with mineral, has waterproof, fire prevention, resistant to elevated temperatures characteristic.

Described stranded conductor 111 adopts traditional cable structures such as ripe twisted wire, stranding, make cable soft more, and the maximum cross-section area of insulated wire cores 11 can reach 630mm ²But the described insulated wire cores 11 equal cableizations of arbitrary section, but maximum cableization 96 cores have covered the demand of the building cable of all sizes such as power cable, control cable, simultaneously also for realize unit cable not limit for length's degree created precondition.

Described fireprotection layer 112 is the mica tape fireprotection layer, has environmental protection, fire-resistant characteristic.

Described insulating barrier 113 adopts low smoke and zero halogen cross-linking flame-retardant polyolefin insulation material, and its rated voltage can reach 600～1000V, has reduced the surge voltage that the frequent starting because of inductance, frequency conversion electrical equipment causes simultaneously, makes line system improve greatly useful life.

Described restrictive coating 3 adopts low-smoke and halogen-free flame retardant polyolefin jacket material, broken away from the restriction of copper sheath to unit cable length, simultaneously because the advantage of the utility model cable flexibility, can realize producing according to the customer requirements fixed length, reduced the joint cost, realize whole consistency of circuit, made things convenient for the installation of cable to lay.

The utility model not only possesses outstanding low smoke and zero halogen fire resistant performance and security performance and is difficult for the moisture absorption, and product structure is simple and economy is high, is easy to install lay, and application is extensive.Owing to improved structure, cancelled the copper pipe use simultaneously, corresponding copper resource of having saved a large amount of preciousnesses, public good is worth also very remarkable.

The above, it only is the utility model preferred embodiment, so can not limit the scope that the utility model is implemented according to this, i.e. the equivalence of doing according to the utility model claim and description changes and modifies, and all should still belong in the scope that the utility model contains.

Claims

1. mineral fire resistant flexible cable, it is characterized in that: described cable comprises from the inside to the outside successively: cable core, separator, restrictive coating; Described cable core is by insulated wire cores and gasket for packing is stranded forms; Described insulated wire cores comprises from the inside to the outside successively: stranded conductor, fireprotection layer, insulating barrier.

2. a kind of mineral fire resistant flexible cable according to claim 1, it is characterized in that: described fireprotection layer is two-layer.