CN205282149U - Locomotive cable - Google Patents

Abstract

The utility model discloses a locomotive cable, which comprises a cable core located at the center, an inner sheath layer and a low-smoke halogen-free outer sheath, and first nylon belts are sequentially arranged between the cable core and the inner sheath layer from inside to outside. layer, the first polyethylene layer, a second polyethylene layer, a second nylon belt layer, a tinned copper wire sparsely wound layer and a Non-woven fabric wrapping layer; the cable core further includes a first copper conductor at the center and an outer copper conductor layer, and the outer copper conductor layer is composed of 6 second copper conductors stranded on the outer surface of the first copper conductor . The locomotive cable of the utility model has a voltage level of 30KV and a withstand voltage test of 75kV/15min, increases the mechanical strength and tensile strength of the cable, and enhances the bending resistance of the cable.

Description

locomotive cable

technical field

The utility model relates to cables, in particular to a locomotive cable.

Background technique

Locomotive cables are mainly cables used for electrical devices in the power distribution system, control system and signal system of rail transit vehicles, and their AC rated voltage is below 3KV.

Existing locomotive cables can only meet the power supply requirements of electric locomotives with a length of about 100 meters. When using locomotive cables exceeding 100 meters, simply increasing the length of the cable cannot meet the requirements of mechanical strength. It may be due to the excessive mechanical force on the cable and the weight of the cable itself. resulting in fracture. Because the locomotive cables are used under harsh conditions such as high temperature and high radiation, and the cables are easily bent and cracked during use, and the cables are easily bent and cracked, which seriously affects the service life. Frequent replacement of cables increases costs and affects operational safety.

Contents of the invention

The purpose of this utility model is to provide a locomotive cable, the locomotive cable voltage level reaches 30KV, withstand voltage test 75kV/15min, increase the mechanical strength and tensile strength of the cable, and enhance the bending resistance of the cable.

In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a locomotive cable, including a cable core located in the center, an inner sheath layer and a low-smoke halogen-free outer sheath, between the cable core and the inner sheath layer The first nylon belt layer and the first polyethylene layer are sequentially arranged from the inside to the outside, and the second polyethylene layer and the second nylon belt are arranged in sequence from the inside to the outside between the inner sheath layer and the low-smoke halogen-free outer sheath. Layer, tinned copper wire sparse winding layer and non-woven wrapping layer;

The cable core further includes a first copper conductor at the center and an outer copper conductor layer, and the outer copper conductor layer is composed of six second copper conductors twisted on the outer surface of the first copper conductor.

The scheme of further improvement in above-mentioned technical scheme is as follows:

1. In the above solution, both the first copper conductor and the second copper conductor are twisted from several copper wires.

2. In the above solution, the first nylon belt layer and the second nylon belt layer are both formed by wrapping nylon belts.

Due to the application of the above-mentioned technical solution, the utility model has the following advantages compared with the prior art:

The locomotive cable of the utility model has a first nylon tape layer, a first polyethylene layer, a second polyethylene layer, and a second nylon tape layer on the inner and outer sides of the inner sheath layer, the voltage level reaches 30KV, and the withstand voltage test is 75kV/ 15min, insulation does not break down Shield resistivity: conductor shielding ≤ 1000Ω.m; insulation shielding ≤ 500Ω.m; -40°C low temperature extension and low temperature impact (no rupture); pass a single vertical burning test; secondly, increase the mechanical strength of the cable Strength and tensile strength, enhance the bending resistance of the cable, reduce cracking, increase the service life of the cable, save operating costs, reduce the frequency of replacement, and improve safety performance.

Description of drawings

Accompanying drawing 1 is the utility model locomotive cable structure schematic diagram.

In the above drawings: 1. Cable core; 2. Inner sheath layer; 3. Low-smoke halogen-free outer sheath; 4. The first nylon belt layer; 5. The first polyethylene layer; 6. The second polyethylene layer ; 7, the second nylon tape layer; 8, the tinned copper wire sparse winding layer; 9, the non-woven wrapping layer; 10, the first copper conductor; 11, the outer copper conductor layer; 111, the second copper conductor.

detailed description

Embodiment 1: A locomotive cable, including a cable core 1 located in the center, an inner sheath layer 2 and a low-smoke halogen-free outer sheath 3, and the cable core 1 and the inner sheath layer 2 are sequentially arranged from inside to outside There is a first nylon belt layer 4 and a first polyethylene layer 5, and a second polyethylene layer 6 and a second nylon belt layer are sequentially arranged between the inner sheath layer and the low-smoke halogen-free outer sheath 3 from inside to outside. 7. Tinned copper wire sparse winding layer 8 and non-woven fabric wrapping layer 9;

The cable core 1 further includes a first copper conductor 10 at the center and an outer copper conductor layer 11 , the outer copper conductor layer 11 is composed of six second copper conductors 111 twisted on the outer surface of the first copper conductor 10 .

Both the first nylon belt layer 4 and the second nylon belt layer 7 are formed by wrapping nylon belts.

Embodiment 2: A locomotive cable, including a cable core 1 located in the center, an inner sheath layer 2 and a low-smoke halogen-free outer sheath 3, and the cable core 1 and the inner sheath layer 2 are sequentially arranged from inside to outside There is a first nylon belt layer 4 and a first polyethylene layer 5, and a second polyethylene layer 6 and a second nylon belt layer are sequentially arranged between the inner sheath layer and the low-smoke halogen-free outer sheath 3 from inside to outside. 7. Tinned copper wire sparse winding layer 8 and non-woven fabric wrapping layer 9;

The cable core 1 further includes a first copper conductor 10 at the center and an outer copper conductor layer 11 , the outer copper conductor layer 11 is composed of six second copper conductors 111 twisted on the outer surface of the first copper conductor 10 .

Both the above-mentioned first copper conductor 10 and the second copper conductor 111 are formed by twisting several copper wires.

When the above-mentioned locomotive cable is used, the inner and outer sides of the inner sheath layer are respectively provided with a first nylon tape layer, a first polyethylene layer, a second polyethylene layer, and a second nylon tape layer. The voltage level reaches 30KV, and the withstand voltage test is 75kV/ 15min, insulation does not break down Shield resistivity: conductor shielding ≤ 1000Ω.m; insulation shielding ≤ 500Ω.m; -40°C low temperature extension and low temperature impact (no rupture); pass a single vertical burning test; secondly, increase the mechanical strength of the cable Strength and tensile strength, enhance the bending resistance of the cable, reduce cracking, increase the service life of the cable, save operating costs, reduce the frequency of replacement, and improve safety performance.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present utility model, and its purpose is to enable those familiar with this technology to understand the content of the present utility model and implement it accordingly, and not to limit the protection scope of the present utility model. All equivalent changes or modifications made according to the spirit of the utility model shall fall within the protection scope of the utility model.

Claims (3)

1. A locomotive cable, characterized in that it includes a cable core (1) located in the center, an inner sheath (2) and a low-smoke halogen-free outer sheath (3), the cable core (1) and the inner sheath The first nylon belt layer (4) and the first polyethylene layer (5) are sequentially arranged between the sheath layers (2) from the inside to the outside, and the inner sheath layer and the low-smoke halogen-free outer sheath (3) A second polyethylene layer (6), a second nylon tape layer (7), a tinned copper wire sparse winding layer (8) and a non-woven wrapping layer (9) are sequentially arranged from the inside to the outside; The cable core (1) further includes a centrally located first copper conductor (10) and an outer copper conductor layer (11), and the outer copper conductor layer (11) is twisted to the first copper conductor (10) by six The second copper conductor (111) on the outer surface is composed. 2. The locomotive cable according to claim 1, characterized in that: the first copper conductor (10) and the second copper conductor (111) are both formed by twisting several copper wires. 3. The locomotive cable according to claim 1, characterized in that: the first nylon tape layer (4) and the second nylon tape layer (7) are both formed by wrapping nylon tape.