Photovoltaic cable

Abstract

The utility model discloses a photovoltaic cable, which comprises a carbon fiber wire positioned in the center, a plurality of copper wires twisted on the carbon fiber wire to form a copper conductor, an insulating layer coated on the surface of the copper conductor, an inner sheath layer coated on the outer surface of the insulating layer, and an outer sheath layer coated on the outer surface of the inner sheath layer, a metal braid layer is arranged between the outer sheath layer and the inner sheath layer, and the metal braid layer is formed by weaving a plurality of metal wires; a plurality of holes are arranged in the outer sheath layer, and the volume of the holes accounts for 40-60% of the volume of the outer sheath layer. According to the photovoltaic cable provided by the utility model, the tensile property of the cable is improved, the cable pair is prevented from being damaged when the cable is dragged, so that the dragging construction of the cable is facilitated, and the layering between the outer sheath layer and the inner sheath layer after long-term use is also avoided.

Description

Technical Field

[0001] This utility model relates to a cable, and more particularly to a photovoltaic cable. Background Technology

[0002] Photovoltaic power generation refers to a new type of power generation technology that directly converts solar energy into electrical energy. With the accelerated transformation of the energy structure, photovoltaic power generation is experiencing a new round of rapid development, driven by increasing demand. Currently, many countries, such as Singapore and Japan, have floating array projects with ample water resources. The advantages of offshore photovoltaic power stations are that they do not occupy land area and can fully utilize the sea surface; the sea surface acts as a cooling and specular reflector for photovoltaic modules, and the radiation from the sea surface is not affected by topography, resulting in higher power generation than ground-based power stations; the location of offshore power stations is less dusty, easier to clean, and avoids problems caused by shading from weeds and other vegetation. However, existing photovoltaic cables are prone to damage during dragging, and the outer and inner sheaths are easily delaminated. Summary of the Invention

[0003] This utility model provides a photovoltaic cable that improves the tensile strength of the cable, avoids damage to the cable pair when dragging, thus facilitating cable dragging construction, and also avoids delamination between the outer and inner sheath layers after long-term use.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a photovoltaic cable includes a carbon fiber filament located at the center, several copper wires twisted together on the carbon fiber filament to form a copper conductor, the surface of the copper conductor is covered with an insulation layer, an inner sheath layer is covered on the outer surface of the insulation layer, and an outer sheath layer is covered on the outer surface of the inner sheath layer; a metal braided layer is provided between the outer sheath layer and the inner sheath layer, and this metal braided layer is woven from several metal wires.

[0005] The above technical solution is further improved as follows:

[0006] 1. In the above scheme, the outer sheath layer has a number of cavities, and the volume of these cavities accounts for 40 to 60% of the volume of the outer sheath layer.

[0007] 2. In the above scheme, the weaving angle of the metal wires in the metal braided layer is no greater than 45 degrees.

[0008] 3. In the above scheme, the diameter of the copper wire is 0.5~2mm.

[0009] 4. In the above scheme, the thickness of the inner sheath layer is 2 to 3 times the thickness of the insulation layer.

[0010] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0011] 1. The photovoltaic cable of this utility model has a carbon fiber filament located at the center, with several copper wires twisted together on the carbon fiber filament to form a copper conductor, which improves the tensile strength of the cable and avoids damage to the cable pair when dragging, thus facilitating cable dragging construction; in addition, a metal braided layer is provided between the outer sheath layer and the inner sheath layer. This metal braided layer is made of several metal wires, which not only improves the electromagnetic interference resistance of the cable, but also avoids delamination between the outer sheath layer and the inner sheath layer after long-term use, thereby extending the service life of the cable.

[0012] 2. The photovoltaic cable of this utility model has an outer sheath layer covering the outer surface of the inner sheath layer. The outer sheath layer has several cavities, the volume of which accounts for 40-60% of the volume of the outer sheath layer. This not only helps the cable float on the sea surface, but also helps to buffer external pressure and avoid damage to the inside of the cable. Attached Figure Description

[0013] Appendix Figure 1 This is a schematic diagram of the structure of the photovoltaic cable of this utility model.

[0014] In the above attached diagram: 1. Copper conductor; 2. Insulation layer; 3. Inner sheath layer; 4. Copper wire; 5. Outer sheath layer; 6. Metal braided layer; 7. Void; 8. Carbon fiber filament; 9. Metal wire. Detailed Implementation

[0015] The present invention will be further described below with reference to embodiments:

[0016] Example 1: A photovoltaic cable includes a carbon fiber filament 8 at the center, several copper wires 4 twisted on the carbon fiber filament 8 to form a copper conductor 1, the surface of the copper conductor 1 is covered with an insulation layer 2, an inner sheath layer 3 is covered on the outer surface of the insulation layer 2, and an outer sheath layer 5 is covered on the outer surface of the inner sheath layer 3; a metal braided layer 6 is provided between the outer sheath layer 5 and the inner sheath layer 3, and the metal braided layer 6 is woven from several metal wires 9.

[0017] The outer sheath layer 5 has several cavities 7, and the volume of these cavities 7 accounts for 48% of the volume of the outer sheath layer 5.

[0018] The braiding angle of the metal wires 9 in the aforementioned metal braided layer 6 is 40 degrees, and the metal wires 9 are copper wires.

[0019] The diameter of the copper wire 4 mentioned above is 1.6 mm.

[0020] The thickness of the inner sheath layer 3 is 2.8 times the thickness of the insulation layer 2.

[0021] The aforementioned metal wire 9 is an aluminum wire.

[0022] Example 2: A photovoltaic cable includes a carbon fiber filament 8 at the center, several copper wires 4 twisted on the carbon fiber filament 8 to form a copper conductor 1, the surface of the copper conductor 1 is covered with an insulation layer 2, an inner sheath layer 3 covers the outer surface of the insulation layer 2, and an outer sheath layer 5 covers the outer surface of the inner sheath layer 3; a metal braided layer 6 is provided between the outer sheath layer 5 and the inner sheath layer 3, and the metal braided layer 6 is woven from several metal wires 9.

[0023] The outer sheath layer 5 has several cavities 7, and the volume of these cavities 7 accounts for 55% of the volume of the outer sheath layer 5.

[0024] The braiding angle of the metal wires 9 in the aforementioned metal braided layer 6 is 35 degrees, and the metal wires 9 are copper wires.

[0025] The diameter of the copper wire 4 mentioned above is 0.8 mm.

[0026] The thickness of the inner sheath layer 3 is 2.4 times the thickness of the insulation layer 2.

[0027] When the above-mentioned photovoltaic cable is used, its tensile strength is improved, avoiding damage to the cable pair when dragging, thus facilitating cable dragging construction; in addition, a metal braided layer is set between the outer sheath layer and the inner sheath layer. This metal braided layer is made of several metal wires, which not only improves the cable's electromagnetic interference resistance, but also avoids delamination between the outer sheath layer and the inner sheath layer after long-term use, thereby extending the cable's service life.

[0028] Furthermore, an outer sheath layer covers the outer surface of the inner sheath layer, and the outer sheath layer has several cavities. The volume of these cavities accounts for 40-60% of the volume of the outer sheath layer. This not only helps the cable float on the sea surface, but also helps to buffer external pressure and avoid damage to the inside of the cable.

[0029] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A photovoltaic cable, characterized by: The application relates to a copper conductor (1) comprising a central carbon fiber wire (8), a plurality of copper wires (4) twisted on the carbon fiber wire (8) to form the copper conductor (1), a surface of the copper conductor (1) being coated with an insulating layer (2), an inner sheath layer (3) coated on the outer surface of the insulating layer (2), and an outer sheath layer (5) coated on the outer surface of the inner sheath layer (3); a metal braiding layer (6) is arranged between the outer sheath layer (5) and the inner sheath layer (3), and the metal braiding layer (6) is braided by a plurality of metal wires (9).

2. Photovoltaic cable according to claim 1 or 2, characterized in that: The outer sheath layer (5) has a plurality of cavities (7), and the volume of the cavities (7) accounts for 40-60% of the volume of the outer sheath layer (5).

3. Photovoltaic cable according to claim 1 or 2, characterized in that: The braiding angle of the metal wires (9) in the metal braiding layer (6) is not greater than 45 degrees.

4. Photovoltaic cable according to claim 1 or 2, characterized in that: The diameter of the copper wires (4) is 0.5-2 mm.

5. Photovoltaic cable according to claim 1 or 2, characterized in that: The thickness of the inner sheath layer (3) is 2-3 times the thickness of the insulating layer (2).

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