Photovoltaic cable

Abstract

The utility model discloses a photovoltaic cable which comprises two conductors, the outer side of each conductor is wrapped with a core wire insulating layer, the outer side of each core wire insulating layer is sleeved with a sheath coating, and the outer wall of the sheath coating is provided with a protruding part used for polarity identification along the length direction of the sheath coating. According to the photovoltaic cable provided by the utility model, the protruding parts used for polarity identification are additionally arranged on the product, so that insulation in the positive and negative core wires can be removed, extrusion injection molding can be carried out by adopting a uniform color when the cable is formed, separate manufacturing is not needed, and the cost of the cable is reduced.

Description

Technical Field

[0001] The utility model relates to the field of wire and cable manufacturing, and in particular to a photovoltaic cable. Background Art

[0002] Aluminum alloy power cable is a power cable with aluminum as the main conductor material, copper, iron, magnesium, silicon, zinc, boron and other alloy elements added, and manufactured through special processes. In order to replace copper with aluminum and use the surplus aluminum metal in the cable industry with huge demand, the National Energy Administration organized the formulation of the "Aluminum Alloy Cable Industry Standard", which adds many special requirements for aluminum alloy cables on the basis of GB / T12706. The popularization and application of aluminum alloy cables to replace copper core cables is an inevitable trend in the development of the cable industry.

[0003] Although the aluminum alloy cables commonly used in the market today have many advantages, some problems cannot be ignored, as detailed below: (1) The positive and negative cables are independent single-core cables, or the single-core cables are twisted and then extruded out of the injection molded shell, which is costly; (2) The conductor core wire has poor bending resistance and is easy to break; (3) The conductor structure has insufficient anti-crushing ability: (4) The positive and negative poles are different in color and need to be manufactured separately in the process, which is costly; (5) There are no obvious positioning features on the surface of the product, which is not easy to install, and the on-site construction operation is inconvenient and inefficient. Therefore, in view of the shortcomings of the photovoltaic aluminum alloy cables currently on the market, it is urgent to develop a photovoltaic-specific low-cost and high-reliability aluminum alloy cable product to improve the cable's anti-crushing, breakage resistance, and shrinkage of the outer insulation layer. Utility Model Content

[0004] The utility model aims to provide a photovoltaic cable, which is used to solve the technical problems of high cost, poor crushing resistance and poor breakage resistance of aluminum alloy cables in the prior art.

[0005] To achieve the above-mentioned purpose, a photovoltaic cable is provided in one embodiment of the utility model, comprising two conductors, each conductor is wrapped with a core wire insulation layer on the outside, a sheath is provided on the outside of the core wire insulation layer, and a protrusion for polarity identification is provided on the outer wall of the sheath along the length direction of the sheath.

[0006] Preferably, the cross section of the conductor is D-shaped.

[0007] Preferably, the cross section of the core wire insulation layer is hollow D-shaped.

[0008] Preferably, the conductor includes a plurality of guide wires and a plurality of bend-resistant fiber wires arranged alternately with the guide wires.

[0009] Preferably, the guide wire is made of aluminum alloy.

[0010] Preferably, the bending-resistant fiber filaments are aramid fiber filaments.

[0011] Preferably, a positioning groove is formed in the outer wall of the sheath along the length direction, and the positioning groove is located between the two conductors.

[0012] Preferably, the positioning groove is V-shaped.

[0013] Preferably, the protruding part is located on the side of one of the conductors.

[0014] Preferably, the two conductors are symmetrically arranged.

[0015] In summary, the beneficial effects of the present utility model are as follows:

[0016] 1. By adding a protruding part for polarity identification to the photovoltaic cable of the present utility model, the inner insulation of the positive and negative core wires can be removed. At the same time, a unified color can be used for extrusion and injection molding during the cable forming process, eliminating the need for separate manufacturing and reducing the cost of the cable.

[0017] 2. By changing the conductor structure of the photovoltaic cable of the present utility model from circular to D-shaped, the product has better anti-rolling ability. At the same time, the oval-shaped outer sheath of the photovoltaic cable further improves the anti-rolling ability of the photovoltaic cable and reduces the manufacturing cost of the photovoltaic cable.

[0018] 3. The cross-section of the core wire insulation layer of the photovoltaic cable of the present utility model is also in a hollow D shape, further reducing the material consumption and saving the manufacturing cost of the photovoltaic cable.

[0019] 4. The conductor of the photovoltaic cable of the present utility model includes a plurality of strands of wire and a plurality of bending-resistant fiber filaments arranged alternately with the wire. The wire is made of aluminum alloy, and the bending-resistant fiber filaments are made of aramid fiber filaments. By adding aramid fiber filaments inside the conductor, the anti-bending ability of the product is increased.

[0020] 5. A positioning groove is formed in the outer wall of the sheath of the photovoltaic cable of the present utility model along the length direction. The positioning groove is located between the two conductors, and the positioning groove is V-shaped. By providing a V-shaped positioning groove, it is convenient for subsequent on-site construction and laying installation positioning, thereby improving the installation efficiency.

[0021] 6. The wire of the photovoltaic cable of the present utility model is made of aluminum alloy. By adding alloy elements to pure aluminum, the mechanical properties of the aluminum alloy conductor are greatly improved, enhancing the bending property, anti-creep property, and corrosion resistance. At the same time, combined with the light weight characteristic of aluminum alloy itself, the labor intensity during transportation and engineering laying is greatly reduced, and the labor cost during construction operations is also reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model;

[0023] Figure 2 This is the front view of an embodiment of the present utility model.

[0024] Among them, 1 - outer sheath, 2 - core wire insulation layer, 3 - conductor, 4 - bending-resistant fiber filament, 5 - protruding part, 6 - positioning groove. Detailed implementation manners

[0025] The present utility model provides a photovoltaic cable, which includes two conductors 3, and the two conductors 3 are symmetrically arranged. The cross-section of the conductor 3 is D-shaped. Changing the structure of the conductor 3 from circular to D-shaped enables the product to have better anti-rolling ability. The conductor 3 includes a plurality of strands of wire and a plurality of bending-resistant fiber filaments 4 arranged alternately with the wire. The bending-resistant fiber filaments 4 are provided to enhance the anti-bending ability of the photovoltaic cable, solving the pain points in the use of existing aluminum alloy cables. Among them, the wire is made of aluminum alloy, and the bending-resistant fiber filaments 4 are made of aramid fiber filaments. The wire is made of aluminum alloy, making the cable an aluminum alloy cable. By adding alloying elements to pure aluminum in the aluminum alloy cable, the mechanical properties of the aluminum alloy conductor have been greatly improved, enhancing the bending property, anti-creep property and corrosion resistance; at the same time, combined with the light weight characteristic of aluminum alloy itself, the labor intensity in transportation and engineering laying is greatly reduced, and the labor cost in construction operations is also reduced.

[0026] Each conductor 3 is wrapped with a core wire insulation layer 2, and the cross-section of the core wire insulation layer 2 is a hollow D shape. Setting the cross-section of the core wire insulation layer 2 as a hollow D shape enables the inner insulation of the present utility model to adopt a D-shaped structure, reducing the material consumption and saving the manufacturing cost of the photovoltaic cable.

[0027] An outer sheath 1 is sleeved outside the core wire insulation layer 2, and the outer sheath 1 is oval. The purpose of setting the outer sheath 1 as oval is: one is to reduce the manufacturing cost of the cable, and the other is to enable the photovoltaic cable to have better anti-rolling ability.

[0028] Protruding parts 5 for polarity identification are arranged on the outer wall of the outer sheath 1 along the length direction of the outer sheath 1. Further, three protruding parts 5 for polarity identification are arranged on the outer wall of the outer sheath 1 along the length direction of the outer sheath 1. Adding the protruding parts 5 for polarity identification can remove the inner insulation of the positive and negative core wires, and at the same time, a unified color can be used for extrusion and injection molding during the cable forming process, without the need for separate manufacturing, reducing the cost of the cable. Preferably, the protruding part 5 is located on the side of one of the conductors 3, and such a setting can avoid affecting the processing of the following positioning groove 6.

[0029] A positioning groove 6 is also formed on the outer wall of the outer sheath 1 along the length direction. The positioning groove 6 is located between the two conductors 3, and the positioning groove 6 is V-shaped. By providing the V-shaped positioning groove 6, it is convenient for the subsequent on-site construction and laying installation positioning, thereby improving the installation efficiency.

[0030] Working principle: The photovoltaic cable of the present utility model is provided with a protruding portion 5 for polarity identification on the product. Such a setting can remove the inner insulation of the positive and negative core wires. At the same time, when the cable is formed, a unified color can be used for extrusion and injection molding, without the need for separate manufacturing, reducing the cost of the cable. Through the optimization of the structure from the core wire, inner insulation to the outer insulation of the photovoltaic cable of the present utility model, the product structure is more compact and the cost is lower.

[0031] Although the specific implementation manners of the present utility model have been described in detail in conjunction with the accompanying drawings, it should not be construed as a limitation on the protection scope of this patent. Within the scope described in the claims, various modifications and deformations that can be made by those skilled in the art without creative efforts still fall within the protection scope of this patent.

Claims

1. A photovoltaic cable, characterized in that: It includes two conductors, each of which is wrapped with a core wire insulation layer on the outside, and a sheath outer covering is sleeved on the outside of the core wire insulation layer. A protruding part for polarity identification is arranged on the outer wall of the sheath outer covering along the length direction of the sheath outer covering.

2. The photovoltaic cable according to claim 1, characterized in that: The cross-section of the conductor is D-shaped.

3. A photovoltaic cable according to claim 1 or 2, characterized in that: The cross-section of the core wire insulation layer is a hollow D shape.

4. The PV cable according to claim 1, wherein: The conductor includes a number of wire filaments and a number of bending-resistant fiber filaments arranged alternately with the wire filaments.

5. The photovoltaic cable according to claim 4, wherein: The wire filaments are made of aluminum alloy.

6. The PV cable according to claim 4, wherein: The bending-resistant fiber filaments are aramid fiber filaments.

7. The photovoltaic cable according to claim 1, wherein: A positioning groove is formed on the outer wall of the sheath outer covering along the length direction, and the positioning groove is located between the two conductors.

8. A photovoltaic cable according to claim 7, characterized in that: The positioning groove is V-shaped.

9. A photovoltaic cable according to claim 1, characterized in that: The protruding part is located on the side of one of the conductors.

10. A photovoltaic cable according to claim 1, characterized in that: The two conductors are symmetrically arranged.

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