CN204407035U

CN204407035U - Flexible fire-proof cable

Info

Publication number: CN204407035U
Application number: CN201520002681.5U
Authority: CN
Inventors: 魏英; 毛传岚; 崔天峰; 李准
Original assignee: SICHUAN XINDIAN CABLE CO Ltd
Current assignee: SICHUAN XINDIAN CABLE CO Ltd
Priority date: 2015-01-04
Filing date: 2015-01-04
Publication date: 2015-06-17
Anticipated expiration: 2025-01-04

Abstract

The utility model discloses a kind of flexible fire-proof cable, it comprises by four stranded cables core formed of core, four core centers are provided with packed layer, cable core is provided with inner covering from the inside to the outside successively, second lapping layer and oversheath, described inner covering adopts mineral ceramic powder and silicon rubber extruding to be formed, described second lapping layer is glass fiber tape, described oversheath adopts low smoke halogen-free flame-retardant polyolefin to make, described core comprises conductor, described conductor is provided with flame retardant coating from the inside to the outside successively, insulating barrier and the first lapping layer, the beneficial effects of the utility model are: flexible fire-proof cable of the present utility model, than traditional cable, there is more superior performance, more can meet the instructions for use of fireproof cable, the place higher to fireproof class requirement can be widely used in.

Description

Flexible fire-proof cable

Technical field

The utility model relates to power cable, is specifically related to a kind of flexible fire-proof cable.

Background technology

Cable normally forms by several or several groups of wires (often organizing at least two) are stranded around center, the similar rope of its shape, simultaneously outer cover height insulating barrier.

Cable has power cable, control cables, compensating cable, shielded type cable, high-temperature cable, computer cable, signal cable, coaxial cable, fire-resisting cable, shipboard cable, mining cable, aluminium alloy cable etc.They are all made up of sub-thread or stranded conductor and insulating barrier, are used for connecting circuit, electrical equipment etc.

Along with people are to the enhancing of environmental protection, security against fire consciousness, the application of fireproof cable progressively expands, the occasion higher to fireproof class requirement such as Aeronautics and Astronautics, navigation, hospital, mall has been expanded to from offshore oil platform originally, fireproof cable can be in the case of fire, ensure the unimpeded of electric power and communication within a certain period of time, try to gain time precious to one to greatest extent, reduce the loss of casualties and lives and properties.

Existing fireproof cable all have employed copper sheath structure, has had a strong impact on the bending radius of cable, although have clear improvement, it also has this very large well space qualitatively in bending radius and fire prevention.

Utility model content

The utility model overcomes fireproof cable in prior art and all have employed copper sheath structure, has that bending radius is limited to be waited not enough, and provide a kind of flexibility good, bending radius is large, and fire-protection rating meets the flexible fire-proof cable that skyscraper etc. requires.

For achieving the above object, the utility model is by the following technical solutions:

A kind of flexible fire-proof cable, it comprises by four stranded cables core formed of core, four core centers are provided with packed layer, cable core is provided with inner covering, the second lapping layer and oversheath from the inside to the outside successively, described inner covering adopts mineral ceramic powder and silicon rubber extruding to be formed, described second lapping layer is glass fiber tape, described oversheath adopts low smoke halogen-free flame-retardant polyolefin to make, described core comprises conductor, and described conductor is provided with flame retardant coating, insulating barrier and the first lapping layer from the inside to the outside successively.

First mineral ceramic powder and silicon rubber extruding is adopted to form inner covering in the technical program, like this when running into fire, inner covering can form ceramic shell, thus stop the heat produced during flame combustion to be delivered to inner cable core, thus avoid cable core to damage, inner covering can also stop the moisture produced during fire extinguishing to the erosion of cable core simultaneously, plays buffer action.

Adopt glass fiber tape to make the second lapping layer in the technical program again, because glass fiber tape is exotic material, so when burning, the ceramic shell that the second lapping layer can prevent inner covering from being formed is broken or come off.

Adopt low smoke halogen-free flame-retardant polyolefin to make oversheath in the technical program, such oversheath can form the carbon shell of porous when burning, thus plays heat-blocking action.

Further technical scheme is, described flame retardant coating is formed by inorganic mineral insulation band is wrapped.

Further technical scheme is, described insulating barrier adopts crosslinked polyethylene to make.

Further technical scheme is, described first lapping layer is formed by glass fiber tape is wrapped.

Adopt in the technical program that inorganic mineral insulation band is wrapped makes flame retardant coating, flame retardant coating insulate under acting as hot conditions, refractory temperature can reach more than 1000 degree, can ensure to play under the high temperature conditions to ensure that the normal power-up of core is run to the insulating effect of core simultaneously.

Crosslinked polyethylene is adopted to make insulating barrier, crosslinked polyetylene insulated is utilize chemical method or physical method, cable insulation polyethylene molecule is made to change main body network molecular structure into by linearity molecular structure, namely thermoplastic polyethylene changes heat cured crosslinked polyethylene into, thus greatly improve its thermal endurance and mechanical performance, decrease its shrinkage, no longer melt after making it be heated, and maintain excellent electric property.Therefore, crosslinked polyetylene insulated have good superiority in heat-resisting, mechanical properties, thus make insulating barrier have the performance such as thermal endurance and cut resistant.

Further technical scheme is, described conductor has the some bursts of stranded formation of copper wire.

Further technical scheme is, the radius of described copper wire cross section is 0.2mm.

First some strands of cross sectional radius are adopted to be the stranded formation conductor of copper wire of 0.2mm in the technical program, because the copper wire adopted is very thin, have good pliability, this just makes cable core have good flexibility simultaneously, thus can ensure that cable core not easily produces fracture in BENDING PROCESS.

Further technical scheme is, described packed layer is glass cord.

Because glass cord forms through special process braiding, there is the main performances such as corrosion-resistant, high strength, can be used for the aspects such as insulating material such as motor, instrument, electrical equipment, so packed layer has good intensity, can ensure respectively to organize the stressed more even of core in cable distort process.

Compared with prior art, the beneficial effects of the utility model are:

Flexible fire-proof cable of the present utility model, has more superior performance than traditional cable, more can meet the instructions for use of fireproof cable, can be widely used in the place higher to fireproof class requirement.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

1 core, 11 conductors, 12 flame retardant coatings, 13 insulating barriers, 14 first lapping layers, 2 inner coverings, 3 second lapping layers, 4 oversheaths, 5 packed layers.

Embodiment

Below in conjunction with accompanying drawing, the utility model is further elaborated.

A kind of flexible fire-proof cable as shown in Figure 1, it comprises by four stranded cables core formed of core, four core centers are provided with packed layer 5, cable core is provided with inner covering 2 from the inside to the outside successively, second lapping layer 3 and oversheath 4, described inner covering 2 adopts mineral ceramic powder and silicon rubber extruding to be formed, described second lapping layer 3 is glass fiber tape, described oversheath 4 adopts low smoke halogen-free flame-retardant polyolefin to make, described core comprises conductor 11, described conductor 11 is provided with flame retardant coating 12 from the inside to the outside successively, insulating barrier 13 and the first lapping layer 14, described flame retardant coating 12 is formed by inorganic mineral insulation band is wrapped, described insulating barrier 13 adopts crosslinked polyethylene to make, described first lapping layer 14 is formed by glass fiber tape is wrapped, described packed layer 5 is glass cord.

According to an embodiment of the present utility model, described conductor 11 has the some bursts of stranded formation of copper wire, and the radius of described copper wire cross section is 0.2mm.

Above embodiment is described in detail to essence of the present utility model; but can not limit protection range of the present utility model; apparently; under enlightenment of the present utility model; the art those of ordinary skill can also carry out many improvement and modification; it should be noted that these improve and modify all to drop within claims of the present utility model.

Claims

1. a flexible fire-proof cable, it is characterized in that: it comprises by four stranded cables core formed of core, four core centers are provided with packed layer (5), cable core is provided with inner covering (2) from the inside to the outside successively, second lapping layer (3) and oversheath (4), described inner covering (2) adopts mineral ceramic powder and silicon rubber extruding to be formed, described second lapping layer (3) is glass fiber tape, described oversheath (4) adopts low smoke halogen-free flame-retardant polyolefin to make, described core comprises conductor (11), described conductor (11) is provided with flame retardant coating (12) from the inside to the outside successively, insulating barrier (13) and the first lapping layer (14).

2. flexible fire-proof cable according to claim 1, is characterized in that described flame retardant coating (12) is formed by inorganic mineral insulation band is wrapped.

3. flexible fire-proof cable according to claim 1, is characterized in that described insulating barrier (13) adopts crosslinked polyethylene to make.

4. flexible fire-proof cable according to claim 1, is characterized in that described first lapping layer (14) is formed by glass fiber tape is wrapped.

5. flexible fire-proof cable according to claim 1, is characterized in that described conductor (11) has the some bursts of stranded formation of copper wire.

6. flexible fire-proof cable according to claim 5, is characterized in that the radius of described copper wire cross section is 0.2mm.

7. flexible fire-proof cable according to claim 1, is characterized in that described packed layer (5) is glass cord.