CN220252918U - Fire-resistant tensile multicore power cable - Google Patents

Abstract

The application discloses fire-resistant tensile multicore power cable, including the oversheath, be provided with two cable cores in the oversheath, be provided with braced skeleton between two cable cores, the cable core includes armor, shielding layer, flame retardant coating, oxygen barrier, insulating layer and the filling layer that sets gradually by outer to interior, is provided with a plurality of sinle silk and a plurality of anti stay cords in the filling layer, and the sinle silk includes conductor, inner insulation layer and the inner sheath that sets gradually from interior to exterior. This cable of this application wraps up in same oversheath has two cable cores, has a plurality of sinle silk in every cable core to can satisfy multiple power transmission's demand, and be provided with flame retardant coating, oxygen barrier layer and insulating layer, the oversheath adopts the steamed low cigarette flame retardant polyolefin material of nothing of fire prevention to make, thereby fire behavior is good, through setting up braced frame and resistance to pull rope, thereby the resistant torsion and the tensile property of cable are good.

Description

Fire-resistant tensile multicore power cable

Technical Field

The utility model relates to the field of cables, in particular to a fireproof tensile multi-core power cable.

Background

With the continuous progress and development of society, the living standard of people is also continuously improved, the demand for electric power is also increasingly greater, and the electric power cable is used as a cable for transmitting and distributing electric energy, and is widely used in power plants, substations, industrial and mining enterprises and the like, so that the use requirement for the electric power cable is gradually improved.

The fire-resistant power cable disclosed in the prior authorized publication number CN215342119U provides fire-resistant flame retardant performance through setting up flame retardant coating and flame retardant sheath, but the whole fire retardant performance of this power cable still is difficult to satisfy current demand, when the conflagration breaks out, after the flame source burns sheath and flame retardant coating, will further burn to the inside of cable, cause bigger loss, moreover the resistant torsion of this cable, tensile properties is weaker, to the application occasion of often twisting or pulling the cable, this cable is harder to satisfy people's user demand, and the structure of this cable is comparatively simple, is harder to satisfy multiple power transmission's demand.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides a power cable.

In order to achieve the above object, the present utility model provides the following technical solutions: the utility model provides a power cable, includes the oversheath, be provided with two cable cores in the oversheath, two be provided with braced skeleton between the cable core, the cable core includes armor, shielding layer, flame retardant coating, oxygen barrier layer, insulating layer and the filling layer that sets gradually from outside to inside, the oversheath adopts the fire-retardant polyolefin material of no halogen low smoke to make, the flame retardant coating is formed by the overlapping of two-layer two-sided mica tape, the oxygen barrier layer is the fire-retardant polyolefin of no halogen low smoke separates the oxygen layer, the insulating layer adopts high fire-retardant ceramic silicone rubber material to make, the filling layer is glass fiber rope to fill and forms, be provided with a plurality of sinle silk and a plurality of anti stay ropes in the filling layer, the sinle silk includes conductor, inner insulation layer and the oversheath that sets gradually from interior to exterior.

Preferably, the structure of the supporting framework is I-shaped;

so that the cable has better torsion resistance.

Preferably, two sides of the supporting framework are provided with accommodating grooves capable of accommodating the cable cores, and two cable cores are respectively accommodated in the two accommodating grooves;

thereby the cable core is laminated more with braced skeleton, braced skeleton plays better supporting role.

Preferably, each cable core is provided with four wire cores, and the four wire cores are distributed in a rectangular array;

therefore, the overall structure of the cable is more stable, and the plurality of wire cores can meet the requirements of various power transmission.

Preferably, each cable core is provided with five tensile ropes, one tensile rope is positioned at the center of each of the four cable cores, and the other four tensile ropes are respectively arranged at intervals with each of the four cable cores;

so that the tensile property of the whole cable is better.

Preferably, the shielding layer is formed by braiding tinned copper wires;

so that the cable has better shielding performance.

Preferably, the armor layer is a metal armor layer;

so that the cable has better mechanical properties.

Compared with the prior art, the utility model has the following beneficial effects:

1. the cable is wrapped with two cable cores in the same outer sheath, and a plurality of wire cores are arranged in each cable core, so that the requirements of various power transmission can be met.

2. The cable is provided with a fireproof layer, an oxygen-isolating layer and a heat-insulating layer, and the outer sheath is made of fireproof halogen-free low-smoke flame-retardant polyolefin material, so that the cable has good fireproof performance.

3. The cable is provided with the supporting framework and the pull-resistant rope, so that the cable is good in torsion resistance and tensile resistance.

Drawings

FIG. 1 is a schematic view of the overall structure of the present utility model;

FIG. 2 is an enlarged schematic view of FIG. 1 at A;

FIG. 3 is a cross-sectional view of the overall structure of the present utility model;

reference numerals illustrate: 1. an outer sheath; 2. a cable core; 2.1, armor layer; 2.2, a shielding layer; 2.3, a fireproof layer; 2.4, an oxygen barrier layer; 2.5, a heat insulation layer; 2.6, a filling layer; 3. a support skeleton; 3.1, accommodating grooves; 4. a wire core; 4.1, conductors; 4.2, an inner insulating layer; 4.3, an inner sheath; 5. and (5) resisting the pull rope.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model provides a multi-core power cable as shown in the figure, which comprises an outer sheath 1, wherein two cable cores 2 are arranged in the outer sheath 1, a supporting framework 3 is arranged between the two cable cores 2, the cable cores 2 comprise an armor layer 2.1, a shielding layer 2.2, a fireproof layer 2.3, an oxygen-isolating layer 2.4, a heat-insulating layer 2.5 and a filling layer 2.6 which are sequentially arranged from outside to inside, the outer sheath 1 is made of a halogen-free low-smoke flame-retardant polyolefin material, the fireproof layer 2.3 is formed by overlapping and wrapping two layers of double-sided mica tapes, the oxygen-isolating layer 2.4 is a halogen-free low-smoke flame-retardant polyolefin oxygen-isolating layer, the heat-insulating layer 2.5 is made of a high-flame-retardant ceramic silicon rubber material, the filling layer 2.6 is formed by filling glass fiber ropes, and a plurality of wire cores 4 and a plurality of anti-pulling ropes 5 are arranged in the filling layer 2.6, and the wire cores 4 comprise a conductor 4.1, an inner insulating layer 4.2 and an inner sheath 4.3 which are sequentially arranged from inside to outside.

The structure of the supporting framework 3 is I-shaped; the two sides of the supporting framework 3 are respectively provided with an accommodating groove 3.1 capable of accommodating the cable cores 2, and the two cable cores 2 are respectively accommodated in the two accommodating grooves 3.1; each cable core 2 is provided with four cable cores 4, and the four cable cores 4 are distributed in a rectangular array; each cable core 2 is provided with five tensile ropes 5, one tensile rope 5 is positioned at the center of four cable cores 4, and the other four tensile ropes 5 are respectively arranged at intervals from the four cable cores 4; the shielding layer 2.2 is formed by braiding tinned copper wires; the armor layer 2.1 is a metal armor layer.

Working principle: the cable of this application has two cable cores at same oversheath inner parcel, all has a plurality of sinle silk in every cable core, thereby can satisfy multiple power transmission's demand, and the oversheath adopts there is not steamed low fire-retardant polyolefin material of cigarette to make, the flame retardant coating is overlapped around the package by two-layer two-sided mica tape and is formed, the oxygen barrier is the steamed low fire-retardant polyolefin oxygen barrier of cigarette, the insulating layer adopts high fire-retardant ceramic silicone rubber material to make, the filling layer is glass fiber rope to fill and forms, thereby the whole fire behavior of cable is good, and the harmful substance that produces when burning is less, environmental protection more, still through setting up braced frame and resistance cord, thereby the cable has better resistant torsion and tensile properties.

While the utility model 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 therein without departing from the scope of the utility model as defined in the following claims.

Claims (3)

1. The utility model provides a fire-resistant tensile multicore power cable, its characterized in that includes oversheath (1), be provided with two cable cores (2) in oversheath (1), two be provided with support skeleton (3) between cable cores (2), cable cores (2) are including armor (2.1), shielding layer (2.2), flame retardant coating (2.3), oxygen barrier (2.4), insulating layer (2.5) and filling layer (2.6) that set gradually from outside to inside, oversheath (1) adopts the low fire-retardant polyolefin material of halogen-free, flame retardant coating (2.3) are overlapped and are wrapped by two-layer double-sided mica tape, oxygen barrier (2.4) are the low fire-retardant polyolefin oxygen barrier of halogen-free, heat insulating layer (2.5) are made for high fire-retardant ceramic silicon rubber material, filling layer (2.6) are glass fiber rope and are filled, be provided with a plurality of wire cores (4) and a plurality of anti-wire cores (4) in filling layer (2.6), wire core (4) are including setting gradually from inside to outside to inside (4.3); the structure of the supporting framework (3) is I-shaped; the two sides of the supporting framework (3) are respectively provided with an accommodating groove (3.1) capable of accommodating the cable cores (2), and the two cable cores (2) are respectively accommodated in the two accommodating grooves (3.1); each cable core (2) is provided with four cable cores (4), and the four cable cores (4) are distributed in a rectangular array; each cable core (2) is provided with five tensile ropes (5), one tensile rope (5) is positioned at the center of each of the four wire cores (4), and the other four tensile ropes (5) are respectively arranged at intervals with the four wire cores (4).

2. The fire-resistant tensile multi-core power cable according to claim 1, characterized in that the shielding layer (2.2) is braided from tinned copper wires.

3. The fire-resistant tensile multi-core power cable according to claim 1, characterized in that the armouring layer (2.1) is a metal armouring layer.