CN216928169U - Halogen-free flame-retardant long-service-life wear-resistant power cable - Google Patents

Abstract

The utility model relates to the technical field of cables, in particular to a halogen-free flame-retardant long-service-life wear-resistant power cable. The cable comprises a cable core, a rubber separation layer, a copper foil shielding layer, a tinned copper shielding layer and a protective layer, wherein the rubber separation layer, the copper foil shielding layer, the tinned copper shielding layer and the protective layer are sleeved on the cable core; the high-flame-retardant fireproof cable core is obtained by matching the glass fiber layer with the asbestos layer, the cable core is wound on the flexible framework, the filling rope is filled, the wrapping tape is wound, the compactness of the cable is improved, the rubber separation layer, the copper foil shielding layer, the tin-plated copper shielding layer and the protective layer are sleeved outside the wrapping tape, the cable function is perfected, and rubber bulges are uniformly arranged on the outer surface of the protective layer; the rubber bulge can reduce the friction between the surface of the protective layer and the ground, thereby reducing the damage and prolonging the service life; the protective layer is a low-smoke halogen-free polyolefin protective sleeve, and is used in combination with the glass fiber layer and the asbestos layer inside and outside, so that the cable has multiple fireproof effects.

Description

Halogen-free flame-retardant long-service-life wear-resistant power cable

Technical Field

The utility model relates to the technical field of cables, in particular to a halogen-free flame-retardant long-service-life wear-resistant power cable.

Background

The power cable is a wire product for carrying and transmitting electric energy and electric signals, and is different from a common single-core cable in that a multi-core cable is adopted to adapt to larger current, wire cores in the multi-core cable are wrapped by an insulating sheath and then wound together in a spiral form, and functions of different cable cores are not necessarily related, so that the effects of fire prevention, fire retardation, wear resistance and the like are also needed, wherein the fire prevention and the fire retardation are the problems of the multi-core cable which need to be paid particular attention to; the existing cable is slowly aged along with the prolonging of the service life, a local short circuit phenomenon sometimes occurs to the cable, high temperature generated by the short circuit can burn through the cable insulation skin and cause the insulation skin to burn, but because the inner wire cores of the multi-core cable are multiple and have different functions, the short circuit burning of one wire core cannot lead to the failure of the whole cable, and other cables can still be normally used; therefore, how to restrain the expansion of the combustion part of the insulating sheath, prevent other wire cores from being burnt and reduce the loss is the primary consideration of the fireproof and flame-retardant performance of the multi-core cable; the mica tape is mostly adopted as a fireproof layer in the conventional fireproof and flame-retardant manner, the fireproof temperature is low, the cable is easily affected with damp, the safety performance of the cable is reduced after the cable is affected with damp, and the expansion of the combustion of the insulating sheath after the cable is short-circuited cannot be prevented.

Therefore, the halogen-free flame-retardant long-life wear-resistant power cable is provided, so that when a short circuit occurs in a multi-core cable, the combustion of an insulating skin at the short circuit part is difficult to further expand, the damage degree of the cable is reduced, and the maintenance cost is reduced, which needs to be done by technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a halogen-free flame-retardant long-life wear-resistant power cable, which aims to solve the technical problem that in the prior art, part of cable cores in a multi-core cable are subjected to short-circuit combustion, the combustion part is easily expanded to other cable cores, and further the loss is continuously expanded.

The technical scheme adopted by the utility model for solving the technical problem is as follows: a halogen-free flame-retardant long-life wear-resistant power cable comprises a conductor, wherein an insulating layer is arranged outside the conductor, a glass fiber layer is arranged outside the insulating layer, and an asbestos layer is arranged outside the glass fiber layer; the conductor, the insulating layer, the glass fiber layer and the asbestos layer sequentially form a wire core; the sinle silk is equipped with threely at least, uses flexible skeleton to separate between the sinle silk, the sinle silk outside is equipped with the filling layer, and the filling layer outside is around having around the band, is equipped with the rubber separate layer around the band outside, and rubber separate layer outside is equipped with the copper foil shielding layer, and the copper foil shielding layer is equipped with tin-plated copper shielding layer, and tin-plated copper shielding layer outside is equipped with the inoxidizing coating, the inoxidizing coating surface evenly is equipped with rubber arch.

Further, the conductor is made of copper wire strands.

Further, the glass fiber layer is made of alkali-free glass fibers, the insulating layer is made of polyethylene, and the thickness ratio of the insulating layer to the glass fiber layer to the asbestos layer is 1:2: 2.

Further, the flexible framework is integrally formed by a polyethylene bar.

Further, the wire cores are evenly and equidistantly distributed around the flexible skeleton.

Further, the filling layer is a filling rope.

Further, the protective layer is formed by extruding and wrapping low-smoke halogen-free polyolefin.

Further, the rubber separation layer, the copper foil shielding layer, the tin-plated copper shielding layer and the protective layer are arranged concentrically.

Further, the number of the wire cores is three, and the diameter of each wire core accounts for 1/3-1/2 of the diameter of the cable body.

The utility model has the beneficial effects that:

(1) according to the utility model, the insulating layer, the glass fiber layer and the asbestos layer are sleeved on the conductor, the glass fiber layer and the asbestos layer are matched to obtain the high-flame-retardant fireproof cable core, then the cable core is wound on the flexible framework, the filling rope is filled, and then the wrapping tape is wound, so that the compactness of the cable is improved, meanwhile, the direct contact among the cable cores is reduced, and the fireproof effect is improved; a rubber separation layer, a copper foil shielding layer, a tinned copper shielding layer and a protective layer are sleeved outside the wrapping tape, so that the function of the cable is perfected, and rubber bulges are uniformly arranged on the outer surface of the protective layer; the rubber bulge can reduce the friction between the surface of the protective layer and the ground, further reduce the damage and prolong the service life; the protective layer used by the utility model is a low-smoke halogen-free polyolefin protective sleeve, and the protective sleeve is matched with the glass fiber layer and the asbestos layer for use, so that the cable has multiple fireproof effects.

Drawings

Fig. 1 is a cross-sectional view of a multi-layer fireproof and thermal insulation cable of the present invention.

The parts in the drawings are numbered as follows: 1. a protective layer; 2. a tinned copper shield layer; 3. a copper foil shielding layer; 4. A rubber spacer layer; 5. wrapping a tape; 6. a filling layer; 7. an asbestos layer; 8. a glass fiber layer; 9. an insulating layer; 10. A conductor; 11. a flexible backbone; 12. a rubber bulge; 100. and a wire core.

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.

Referring to fig. 1, the present invention provides a halogen-free flame-retardant long-life wear-resistant power cable, which includes a conductor 10, wherein the conductor 10 is formed by twisting copper wires, an insulating layer 9 is wrapped outside the twisted conductor 10, a glass fiber layer 8 is sleeved outside the insulating layer 9, and an asbestos layer 7 is sleeved outside the glass fiber layer 8, so as to form a wire core 100. The glass fiber layer 8 is woven by the alkali-free glass fibers, the alkali-free glass fibers have good high-temperature resistance and heat insulation effects and can withstand the temperature of 200-800 ℃, the asbestos layer 7 woven by the asbestos fibers is wrapped outside the glass fiber layer 8, the temperature resistance and the insulativity of the wire core 100 are further improved, meanwhile, the asbestos layer 7 also has good waterproofness and acid and alkali resistance, the wire core 100 has the functions of corrosion resistance, waterproofness and low heat conduction efficiency, when short circuit occurs, the insulating layer 9 is ignited at high temperature, but the glass fiber layer 8 and the asbestos layer 7 wrapped outside the insulating layer 9 can reduce high-temperature conduction, and further expansion of the combustion range is effectively restrained.

Further, the insulating layer 9 is made of polyethylene, and the thickness ratio of the insulating layer 9 to the glass fiber layer 8 to the asbestos layer 7 is 1:2: 2.

The cable is characterized in that the number of the wire cores 100 is three, the diameter of each wire core 100 accounts for 1/3-1/2 of the diameter of the cable body, the three wire cores 100 are separated by the flexible framework 11, and specifically, the wire cores 100 are uniformly distributed around the flexible framework 11 at equal intervals. According to the utility model, the three wire cores 100 are isolated to improve the fireproof effect among the wire cores 100, when one wire core 100 is in short circuit, the glass fiber layer 8 and the asbestos layer 7 are damaged, the insulating layer 9 can be burnt, and the high temperature generated by the burning of the wire core 100 can not directly contact with other wire cores 100, so that the high temperature is prevented from being directly contacted and conducted, and the fireproof effect of the utility model is improved.

Further, the flexible skeleton 11 is integrally formed by a polyethylene bar.

According to the utility model, the three wire cores 100 are uniformly distributed around the flexible framework 11, the filling layer 6 is wrapped in the hole between the three wire cores 100 and the flexible framework 11, and the wrapping tape 5 is wound outside the filling layer 6, so that the roundness of the cable is improved.

Further, the filling layer 6 is a filling rope; specifically, the filling rope is made of polypropylene plastic, and the ignition point is 590 ℃; according to the utility model, the wrapping tape 5 is matched with the filling layer 6, the wrapping tape 5 is wound on the three wire cores 100, and then a larger pressing force is applied among the three wire cores 100, so that the filling rope is completely filled in gaps among the wire cores 100, the cable is prevented from being loosened and expanded after being used for a long time, meanwhile, the filling layer 6 can effectively isolate the wire cores 100, direct contact is reduced, and the fireproof effect is improved; after the wrapping tape 5 is wound, the utility model has good compression resistance and deformation resistance, reduces the flow of internal air and further improves the fireproof performance.

Furthermore, a rubber separation layer 4 is sleeved outside the wrapping tape 5 to improve the elasticity and the insulativity of the utility model; the copper foil shielding layer 3 and the tinned copper shielding layer 2 are wrapped outside the rubber separation layer 4, so that the safety of the utility model is improved.

Furthermore, rubber bulges 12 are uniformly arranged on the outer surface of the protective layer 1; the rubber bulge 12 can reduce the friction between the surface of the protective layer 1 and the ground, further reduce the damage, improve the wear resistance and prolong the service life.

Further, the protective layer 1 is formed by extruding low-smoke halogen-free polyolefin, and meanwhile, the rubber separation layer 4, the copper foil shielding layer 3, the tinned copper shielding layer 2 and the protective layer 1 are concentrically arranged; the low-smoke halogen-free polyolefin protective sleeve has a good flame-retardant effect, can effectively prevent fire and retard flame, and reduces pollution.

According to the utility model, the insulating layer 9, the glass fiber layer 8 and the asbestos layer 7 are sleeved on the conductor 10, the glass fiber layer 8 and the asbestos layer 7 are matched to obtain the high-flame-retardant fireproof cable core 100, then the three cable cores 100 are wound on the flexible framework 11, the filling rope is filled, and then the wrapping tape 5 is wound, so that the cable compactness is improved, meanwhile, the direct contact among the three cable cores 100 is reduced, and the fireproof effect is improved; a rubber separation layer 4, a copper foil shielding layer 3, a tinned copper shielding layer 2 and a protective layer are sleeved outside the wrapping tape 5, so that the function of the cable is improved; the outer surface of the protective layer 1 is uniformly provided with rubber bulges 12 for reducing the friction between the surface of the protective layer 1 and the ground, further reducing the damage, improving the wear resistance and prolonging the service life; the protective layer 1 is a low-smoke halogen-free polyolefin protective sleeve, and is matched with the glass fiber layer 8 and the asbestos layer 7 for use, so that the cable has multiple fireproof effects.

It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims (9)

1. The halogen-free flame-retardant long-service-life wear-resistant power cable is characterized by comprising a conductor (10), wherein an insulating layer (9) is arranged outside the conductor (10), a glass fiber layer (8) is arranged outside the insulating layer (9), and an asbestos layer (7) is arranged outside the glass fiber layer (8); the conductor (10), the insulating layer (9), the glass fiber layer (8) and the asbestos layer (7) sequentially form a wire core (100); sinle silk (100) are equipped with threely at least, are equipped with flexible skeleton (11) between sinle silk (100) and separate, sinle silk (100) outside is equipped with filling layer (6), and filling layer (6) outside is around having around band (5), is equipped with rubber separate layer (4) around band (5) outside, and rubber separate layer (4) outside is equipped with copper foil shielding layer (3), and copper foil shielding layer (3) outside is equipped with tin-plated copper shielding layer (2), and tin-plated copper shielding layer (2) outside is equipped with inoxidizing coating (1), inoxidizing coating (1) surface evenly is equipped with rubber arch (12).

2. A halogen-free flame-retardant long-life wear-resistant power cable according to claim 1, characterized in that the conductor (10) is made of copper strands.

3. The halogen-free flame-retardant long-life wear-resistant power cable according to claim 1, wherein the glass fiber layer (8) is made of alkali-free glass fibers, the insulating layer (9) is made of polyethylene, and the thickness ratio of the insulating layer (9), the glass fiber layer (8) and the asbestos layer (7) is 1:2: 2.

4. A halogen-free flame-retardant long-life wear-resistant power cable according to claim 1, characterized in that the flexible backbone (11) is integrally formed from a polyethylene rod.

5. A halogen free flame retardant, long life abrasion resistant power cable according to claim 1 characterized in that the cores (100) are evenly equidistantly distributed around the flexible backbone (11).

6. A halogen-free flame-retardant long-life wear-resistant power cable according to claim 1, characterized in that the filler layer (6) is a filler rope.

7. The halogen-free flame-retardant long-life wear-resistant power cable according to claim 1, wherein the protective layer (1) is formed by extruding low-smoke halogen-free polyolefin.

8. A halogen free flame retardant high life wear resistant power cable according to claim 1 characterized in that the rubber separator layer (4), copper foil shield layer (3), tin plated copper shield layer (2) and protective layer (1) are arranged concentrically.

9. The halogen-free flame-retardant long-life wear-resistant power cable as claimed in claim 1, wherein the number of the wire cores (100) is three, and the diameter of the wire core (100) accounts for 1/3-1/2 of the diameter of the cable body.

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