CN216435519U - Aluminum alloy power cable - Google Patents

Abstract

The utility model discloses an aluminum alloy power cable, include and be the cable core from inside to outside in proper order, around covering, protective layer, restrictive coating, wherein: the cable core with be equipped with fire-retardant filling layer in the covering, fire-retardant filling layer adopts fire-retardant polyolefin filler strip to make, form by the non-woven fabrics preparation around the covering, the utility model discloses a fire-retardant filler separates adjacent cable core, prevents that another cable core is lighted fast in a cable core burning, wraps up the cable core around the covering through the non-woven fabrics simultaneously, prevents the intensity of a fire and spreads fast, strives for the time for putting out a fire, has solved cable burning among the prior art, technical problem who spreads fast.

Description

Aluminum alloy power cable

Technical Field

The utility model relates to a power cable, especially an aluminum alloy power cable.

Background

With the rapid development and continuous scale expansion of industries such as Chinese electric power, petroleum, chemical engineering, urban rail transit, automobiles, shipbuilding and the like, particularly the successive investment and construction of power grid transformation and extra-high voltage engineering, electric wires and cables are more and more widely applied, and meanwhile, higher requirements are put forward on various performances of the cables.

The copper resource of the country is increasingly tense and endangered shortage, the aluminum has good conductive effect, light weight and low price, and the aluminum alloy is used for replacing copper, but the existing aluminum alloy cable is more active and flammable compared with the copper cable, and once the cable is burnt, the cable can quickly spread to cause great damage to residents.

SUMMERY OF THE UTILITY MODEL

1. The technical problem to be solved by the utility model

An object of the utility model is to provide an aluminum alloy power cable to solve the problem that proposes among the above-mentioned background art, current aluminum alloy cable is more lively compared with the copper cable, and is more easily fired, and the cable once burning just can stretch fast, causes very big harm for the resident.

2. Technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an aluminum alloy power cable, includes and is the cable core from inside to outside in proper order, around covering, protective layer, restrictive coating, wherein: the cable core with be equipped with fire-retardant filling layer in the covering around, fire-retardant filling layer adopts fire-retardant polyolefin filler strip to make, it is formed by the non-woven fabrics preparation to wind the covering.

Preferably, the cable core is an aluminum alloy conductor, a conductor shielding layer, an insulating shielding layer and a metal shielding insulating layer from inside to outside in sequence.

Preferably, the protective layer comprises a waterproof layer and a heat-insulating flame-retardant layer from inside to outside in sequence.

Preferably, the heat-insulating flame-retardant layer is made of basalt fiber cloth.

Preferably, the sheath layer is made of low-smoke halogen-free materials.

2. Advantageous effects

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a fire-retardant filler separates adjacent cable core, prevents that another cable core from being lighted fast in a cable core burning, wraps up the cable core around the covering through the non-woven fabrics simultaneously, prevents the intensity of a fire and spreads fast, strives for the time for putting out a fire.

Drawings

FIG. 1 is a schematic structural view of the present invention;

figure 2 is the utility model discloses cable core structure schematic diagram.

In the figure: 1. a cable core; 11. an aluminum alloy conductor; 12. a conductor shield layer; 13. an insulating layer; 14. an insulating shield layer; 15. a metal shield insulating layer; 2. wrapping a covering; 3. a protective layer; 31. a waterproof layer; 32. a heat insulating flame retardant layer; 4. a sheath layer; 5. and a flame-retardant filling layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

Please refer to fig. 1 again, the utility model provides an aluminum alloy power cable, include from inside to outside in proper order for cable core 1, around covering 2, protective layer 3, restrictive coating 4, wherein: the cable core 1 with be equipped with fire-retardant filling layer 5 in the covering 2, fire-retardant filling layer 5 adopts fire-retardant polyolefin filler strip to make, the covering 2 is formed by the non-woven fabrics preparation around.

Obviously, the flame-retardant filling layer 5 separates the plurality of cable cores 1, prevents one cable core 1 from being burnt to quickly ignite the other cable core 1, and wraps the cable cores 1 through the non-woven fabric wrapping layer 2 to prevent the fire from quickly spreading and strive for time for fire extinguishment;

obviously, the stability of the inside of the cable is also guaranteed simultaneously by the flame-retardant filling layer 5, and the cable core 1 is prevented from shaking in the inside.

Considering that the unsmooth surface of the aluminum alloy conductor 11 can cause the increase of the electric field intensity on the surface of the conductor and the tip effect occurs, on the basis of the above embodiment, a preferable scheme is provided, the conductor shielding layer 12 is installed on the surface of the aluminum alloy conductor 11, considering that the cable can bear rated voltage and overvoltage and lightning impulse voltage during system failure for a long time in the service life cycle of the cable, and simultaneously ensuring that the phenomenon of relative ground or alternate breakdown short circuit does not occur in the working heating state, so the insulating layer 13 is installed on the surface of the conductor shielding layer 12, and the preferable scheme is provided, the insulating layer 13 is made of polypropylene, and the polypropylene has excellent electrical property, good high temperature resistance and oil resistance;

on the basis of the above embodiments, in order to limit the electric field inside the cable, protect personal safety, and protect the cable from external interference, it is necessary to install a metal shielding insulating layer 15 on the surface of the insulating layer 13, and in order to make the insulating layer 13 and the metal shielding insulating layer 15 tightly contact and eliminate the gap between the insulating layer 13 and the metal shielding insulating layer 15, an insulating shielding layer 14 is installed between the insulating layer 13 and the metal shielding insulating layer 15.

On the basis of the embodiment, in consideration of preventing water vapor from entering the cable to influence the conductor, a preferable scheme is provided by installing a waterproof layer 31 outside the lapping layer 2, wherein the waterproof layer 31 is made of a single-sided copper-plastic composite belt, the cladding mode is that the lapping cover is longitudinally wrapped, the lapping cover width at the edges of two sides of the lapping cover is about 18% of the single-sided copper-plastic composite belt width, and the lapping cover parts are bonded with each other;

in consideration of preventing the aluminum alloy cable from being burnt by external factors, a preferable scheme is provided by installing the heat-insulating flame-retardant layer 32 outside the waterproof layer 31, wherein the heat-insulating flame-retardant layer 32 is made of basalt fiber cloth, the basalt fiber flame-retardant cloth is textile cloth processed by single basalt fiber spun yarn, and the heat-insulating flame-retardant layer has the functions of non-combustion, high temperature resistance (1100 ℃), compact structure, no irritation, soft texture and toughness;

on the basis of above-mentioned embodiment, consider that the cable has harmful gas to produce when burning, causes the injury to the human body, consequently at the externally mounted restrictive coating 4 of protective layer 3, provide an preferred scheme, restrictive coating 4 forms for the preparation of low smoke and zero halogen material, and the reducible poisonous, the corrosive gas that produces when its burning of low smoke and zero halogen material reduces the injury that causes the personnel.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should fall within the protection scope of the present invention.

Claims (1)

1. An aluminum alloy power cable which characterized in that: include from inside to outside in proper order cable core (1), around covering (2), protective layer (3), restrictive coating (4), wherein: the cable core (1) and the wrapping layer (2) are internally provided with a flame-retardant filling layer (5), the flame-retardant filling layer (5) is made of flame-retardant polyolefin filling strips, and the wrapping layer (2) is made of non-woven fabric;

the cable core (1) comprises an aluminum alloy conductor (11), a conductor shielding layer (12), an insulating layer (13), an insulating shielding layer (14) and a metal shielding insulating layer (15) from inside to outside in sequence;

the protective layer (3) comprises a waterproof layer (31) and a heat-insulating flame-retardant layer (32) in sequence from inside to outside, the waterproof layer (31) is made of a single-sided copper-plastic composite belt, the covering mode is that longitudinal covering is covered, the covering width of the edges of two sides of the longitudinal covering is 18% of the width of the single-sided copper-plastic composite belt, and the covering parts are bonded with each other;

the heat-insulating flame-retardant layer (32) is made of basalt fiber cloth;

the sheath layer (4) is made of low-smoke halogen-free materials.

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