CN218069426U - Power cable based on double flame-retardant structures - Google Patents

Abstract

The application discloses power cable based on two fire-retardant structures, include by outer sheath that sets gradually to interior outward, the armor, first fire-retardant layer, the shielding layer, the fire-retardant layer of second, separate oxygen layer and cable core, a plurality of cable core encirclements have a no halogen support element, the cable core includes the conductor that sets gradually by interior to exterior, the insulating layer, interior fire-retardant layer, outer fire-retardant layer and nylon covering, the nylon covering includes two plane portions and an cambered surface portion, first arc chamfer has between two plane portions, all have second arc chamfer between every cambered surface portion and the plane portion, no halogen support element department has a plurality of concave parts. The utility model provides a power cable, the cable core has two-layer fire-retardant layer, and the outside cladding of cable core has two-layer fire-retardant layer to make the cable have better flame retardant efficiency, there is not steamed supporting element to play the supporting role to the cable core, the inseparable butt of the first arc chamfer of nylon cladding department and the concave part of nothing steamed supporting element department, thereby make the structure of cable more stable.

Description

Power cable based on double flame-retardant structures

Technical Field

The utility model relates to a cable field, more specifically relates to a power cable based on two fire-retardant structures.

Background

The power cable is an electric energy transmission medium, is used for transmitting and distributing large-function electric energy in a main line of a power system and provides a power supply for the operation of equipment, and is characterized by higher voltage and higher current.

The prior publication No. CN202549453U discloses a silicon rubber flame-retardant power cable, a heat insulation layer is arranged between an insulation wire core and silicon rubber, a flame-retardant layer is arranged outside a sheath, the power cable only has one flame-retardant layer, the flame-retardant effect is poor, and when a fire disaster occurs, the fire disaster quickly spreads, and the serious loss is easily caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming prior art's defect, provide a power cable based on two fire-retardant structures.

In order to achieve the above object, the present invention provides the following technical solutions: the utility model provides a power cable based on two fire-retardant structures, includes by outer sheath, armor, first fire-retardant layer, shielding layer, the fire-retardant layer of second, separate oxygen layer and cable core that sets gradually in to, the cable core has a plurality ofly, and is a plurality of the cable core is annular equidistant distribution, and is a plurality of the cable core surrounds there is a no halogen support unit, the cable core includes by interior conductor, insulating layer, the fire-retardant layer in, outer fire-retardant layer and the nylon covering that sets gradually outside to, the nylon covering includes two plane portions and an arc portion, two first arc chamfer has between the plane portion, every the arc portion with all have second arc chamfer between the plane portion, no halogen support unit department have a plurality ofly with the concave groove part that first arc chamfer matches, first chamfer butt concave groove portion, arc portion, plane portion, first arc chamfer, second arc chamfer and concave groove portion all along power cable's length direction extends.

Preferably, a plurality of tensile steel wire ropes are arranged at the halogen-free supporting unit and distributed in an annular shape at equal intervals, and steel wire rope cladding is coated outside the tensile steel wire ropes;

thereby the cable has good tensile effect.

Preferably, a pressure-resistant filling unit is arranged at the center of the halogen-free supporting unit, the tension-resistant steel wire ropes surround the pressure-resistant filling unit, and a plurality of accommodating grooves capable of accommodating the steel wire rope cladding are formed around the pressure-resistant filling unit;

thereby the cable has good pressure-resistant effect.

Preferably, the pressure-resistant filling unit is made of EVA foaming material;

thereby the withstand voltage effect of cable is better.

Preferably, the armor layer is a steel wire armor layer;

thus, the cable has good mechanical properties.

Preferably, the number of the cable cores is 6.

Preferably, the inner flame-retardant layer, the outer flame-retardant layer, the first flame-retardant layer and the second flame-retardant layer are all low-smoke halogen-free flame-retardant layers;

thereby making the cable more environmentally friendly.

Has the advantages that: the utility model provides a power cable, the cable core has two-layer fire-retardant layer, the outside cladding of cable core has two-layer fire-retardant layer, thereby make the cable have better flame retardant efficiency, a plurality of cable core encirclements have no halogen supporting element, thereby play the supporting role to the cable core, the first arc chamfer of the nylon cladding department of cable core and the inseparable butt of concave part of no halogen supporting element department, thereby make the structure of cable more stable.

Drawings

FIG. 1 is a schematic structural diagram of the present embodiment;

FIG. 2 is a schematic sectional view of the present embodiment;

FIG. 3 is a schematic diagram of a cable core structure;

figure 4 is a schematic cross-sectional view of a cable core;

fig. 5 is a schematic structural diagram of a halogen-free support unit.

Description of the reference numerals: 1. an outer sheath; 2. an armor layer; 3. a first flame retardant layer; 4. a shielding layer; 5. a second flame retardant layer; 6. an oxygen barrier layer; 7. a cable core; 7.1, a conductor; 7.2, an insulating layer; 7.3, an inner flame-retardant layer; 7.4, an outer flame-retardant layer; 7.5, nylon cladding; 7.5.1, a planar portion; 7.5.2, an arc surface part; 7.5.3, a first arc-shaped chamfer; 7.5.4, a second arc-shaped chamfer; 8. a halogen-free support unit; 8.1, tensile steel wire ropes; 8.1.1, steel wire rope cladding; 8.2, a pressure-resistant filling unit; 8.3, groove part.

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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a power cable based on two fire-retardant structures as shown in fig. 1-5, include by outer oversheath 1, armor 2, first fire-retardant layer 3, shielding layer 4, the fire-retardant layer 5 of second, separate oxygen layer 6 and cable core 7 that set gradually in to, cable core 7 has a plurality ofly, and is a plurality of cable core 7 is annular equidistant distribution, and is a plurality of cable core 7 surrounds there is a no halogen support unit 8, cable core 7 includes by interior conductor 7.1, insulating layer 7.2, interior fire-retardant layer 7.3, outer fire-retardant layer 7.4 and the nylon covering 7.5 that sets gradually outside to, nylon covering 7.5 includes two plane portions 7.5.1 and a cambered surface portion 7.5.2, two have first arc chamfer 7.5.3 between plane portion 7.5.1, every cambered surface portion 7.5.2 with all have second arc chamfer 7.5.4 between 7.5.1, arc 7.5.8 department has a plurality of arc support unit matches first arc 7.5.7.5.8 arc chamfer portion 7.5.7.8, the arc chamfer portion 7.5.8 is along the equal length of the first arc chamfer portion 3.7.5.7.5 chamfer portion, the arc chamfer portion is along the equal length of the arc chamfer portion of the arc 7.7.7.5.8.

A plurality of tensile steel wire ropes 8.1 are arranged at the halogen-free supporting unit 8, the tensile steel wire ropes 8.1 are distributed in an annular shape at equal intervals, and steel wire rope cladding layers 8.1.1 are coated outside the tensile steel wire ropes 8.1; a pressure-resistant filling unit 8.2 is arranged at the center of the halogen-free supporting unit 8, the pressure-resistant filling unit 8.2 is surrounded by the tensile steel wire ropes 8.1, and a plurality of accommodating grooves capable of accommodating the steel wire rope cladding 8.1.1 are formed around the pressure-resistant filling unit 8.2; the pressure-resistant filling unit 8.2 is made of EVA foaming material; the armor layer 2 is a steel wire armor layer; the number of the cable cores 7 is 6; the inner flame-retardant layer 7.3, the outer flame-retardant layer 7.4, the first flame-retardant layer 3 and the second flame-retardant layer 5 are all low-smoke halogen-free flame-retardant layers.

The working principle is as follows: the utility model provides a power cable based on two fire-retardant structures, the cable core has interior fire-retardant layer and outer fire-retardant layer, the outside of cable core has first fire-retardant layer and the fire-retardant layer of second, thereby make the cable have better flame retardant efficiency, a plurality of cable core encircles have no halogen supporting element, thereby play the supporting role to the cable core, and then make the structural strength of cable big, the nylon covering department of cable core has first arc chamfer, there is not halogen supporting element department has the concave part, first arc chamfer and the inseparable butt of concave part, thereby make the structure of cable more stable, a plurality of tensile wire rope make the tensile strength of cable big, withstand voltage filling unit is made by EVA expanded material, thereby make the cable have better withstand voltage effect.

The utility model provides a power cable, the cable core has two-layer fire-retardant layer, the outside cladding of cable core has two-layer fire-retardant layer, thereby make the cable have better flame retardant efficiency, a plurality of cable core encirclements have no steamed support element, thereby play the supporting role to the cable core, the first arc chamfer of the nylon cladding department of cable core and the inseparable butt of concave part of no steamed support element department, thereby make the structure of cable more stable.

Although the invention has been shown and described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention as defined in the following claims.

Claims (7)

1. A power cable based on a double flame-retardant structure is characterized by comprising an outer sheath (1), an armor layer (2), a first flame-retardant layer (3), a shielding layer (4), a second flame-retardant layer (5), an oxygen barrier layer (6) and a cable core (7) which are arranged from outside to inside in sequence, the cable cores (7) are arranged in a plurality, the cable cores (7) are distributed in an annular shape at equal intervals, a halogen-free supporting unit (8) is surrounded by the cable cores (7), the cable core (7) comprises a conductor (7.1), an insulating layer (7.2), an inner flame-retardant layer (7.3), an outer flame-retardant layer (7.4) and a nylon cladding (7.5) which are arranged from inside to outside in sequence, the nylon cladding (7.5) comprises two plane parts (7.5.1) and an arc-shaped surface part (7.5.2), a first arc-shaped chamfer (7.5.3) is arranged between the two plane parts (7.5.1), a second arc-shaped chamfer (7.5.4) is arranged between each arc-shaped surface part (7.5.2) and the plane part (7.5.1), the halogen-free supporting unit (8) is provided with a plurality of groove parts (8.3) matched with the first arc-shaped chamfer angles (7.5.3), the first arc-shaped chamfer abuts against the groove portion (8.3), and the arc-shaped surface portion (7.5.2), the plane portion (7.5.1), the first arc-shaped chamfer (7.5.3), the second arc-shaped chamfer (7.5.4) and the groove portion (8.3) all extend along the length direction of the power cable.

2. The power cable based on the double flame retardant structure as recited in claim 1, wherein a plurality of tensile steel wire ropes (8.1) are arranged at the halogen-free supporting unit (8), the tensile steel wire ropes (8.1) are distributed in an annular shape at equal intervals, and a steel wire rope cladding (8.1.1) is coated outside the tensile steel wire ropes (8.1).

3. The power cable based on the double flame retardant structure as recited in claim 2, wherein a pressure-resistant filling unit (8.2) is disposed at the center of the halogen-free supporting unit (8), a plurality of tensile steel cords (8.1) surround the pressure-resistant filling unit (8.2), and a plurality of accommodating grooves capable of accommodating the steel cord cladding (8.1.1) are disposed around the pressure-resistant filling unit (8.2).

4. A power cable based on a double flame retardant structure, according to claim 3, characterized in that the pressure resistant filling unit (8.2) is made of EVA foam.

5. A power cable based on a double flame retardant structure according to claim 1, characterized in that the armouring layer (2) is a steel wire armouring layer.

6. A power cable based on a double flame retardant structure according to claim 1, characterized in that the number of cable cores (7) is 6.

7. A power cable based on a dual flame retardant structure according to claim 1, characterized in that the inner flame retardant layer (7.3), the outer flame retardant layer (7.4), the first flame retardant layer (3) and the second flame retardant layer (5) are all low smoke zero halogen flame retardant layers.

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