Solar double-core photovoltaic cable

Abstract

The utility model relates to the technical field of photovoltaic cables, and discloses a solar double-core photovoltaic cable, which comprises two inner cores, insulating layers are arranged on the outer surface layers of the inner cores, protective layers are arranged on the outer surface layers of the two insulating layers, and the outer surface layers of the protective layers are connected with flame-retardant layers through filling layers. A waterproof layer is arranged on the outer surface layer of the flame-retardant layer, and a wear-resistant layer is arranged on the outer surface layer of the waterproof layer; the filling layer comprises a first filling layer arranged on the outer surface layer of the protection layer, a second filling layer is arranged between the outer surface layer of the first filling layer and the inner layer of the flame-retardant layer, and a plurality of reinforcing cores are arranged in the second filling layer. According to the utility model, the double-layer filling layer composed of the first filling layer and the second filling layer can provide better mechanical protection, reduce the damage of external impact and extrusion to the cable, improve the absorption performance of impact force and extrusion force, and cooperate with the reinforcing core to improve the tensile property and strength of the cable.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic cables, in particular to a solar double-core photovoltaic cable. Background Art

[0002] Solar dual-core photovoltaic cable is a cable specially used in solar photovoltaic power generation systems. It is usually composed of two wires and is used to connect photovoltaic modules with inverters or other electrical equipment. It has good weather resistance, insulation performance, conductivity, pressure resistance and flexibility. It is an important electrical connection component in solar energy systems.

[0003] After searching, a dual-core solar photovoltaic cable with announcement number CN215577793U includes: a cable body, a flame retardant layer, a water blocking layer, a buffer layer and a wear-resistant layer. The left and right sides of the cable body are provided with wire cores, the outside of the wire cores are provided with protective layers, the upper and lower sides of the cable body are provided with silicone tubes, a filling layer is provided between the inside of the cable body and the protective layer and the silicone tube, a flame retardant layer is provided on the outside of the cable body, a water blocking layer is provided on the outside of the flame retardant layer, a buffer layer is provided on the outside of the water blocking layer, a plurality of through holes are provided in the inner cavity of the buffer layer, and a wear-resistant layer is provided on the outside of the buffer layer, which can improve the tensile effect of the cable, avoid the cable being pulled by wind when used outdoors and causing the cable to break, improve the compressive effect of the cable, avoid the cable being damaged by pressure, and at the same time, avoid the cable from being ruptured due to thermal expansion and contraction, and improve the service life of the cable;

[0004] Based on the above patent, the background technology thereof mentions the problem that the cable does not have a buffering function when under pressure. In response to this technical problem, the present application proposes a solar dual-core photovoltaic cable. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a solar double-core photovoltaic cable, aiming to improve the problem in the prior art that the cable has no buffering function when under pressure, resulting in the cable being easily broken.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A solar dual-core photovoltaic cable comprises two inner cores, wherein the outer layers of the inner cores are provided with insulating layers, the outer layers of the two insulating layers are provided with protective layers, the outer layers of the protective layers are connected with flame retardant layers via filling layers, the outer layers of the flame retardant layers are provided with waterproof layers, and the outer layers of the waterproof layers are provided with wear-resistant layers.

[0008] Furthermore, the filling layer includes a filling layer 1 arranged on the outer layer of the protective layer, a filling layer 2 is arranged between the outer layer of the filling layer 1 and the inner layer of the flame retardant layer, and a plurality of reinforcing cores are arranged inside the filling layer 2, and the plurality of reinforcing cores are equidistantly surrounded inside the filling layer 2.

[0009] Furthermore, the first filling layer is prepared by using polyurethane filling glue as raw material, the second filling layer is prepared by using epoxy resin filling glue as raw material, and the reinforcing core is prepared by steel wire.

[0010] Furthermore, the insulating layer is prepared by using cross-linked polyethylene as raw material.

[0011] Furthermore, the protective layer is prepared using silicone rubber as raw material.

[0012] Furthermore, the flame retardant layer is prepared by using flame retardant cross-linked polyethylene as raw material.

[0013] Furthermore, the waterproof layer is prepared using propylene rubber as raw material.

[0014] Furthermore, the wear-resistant layer is formed by weaving a mixture of aluminum wire and nylon wire.

[0015] The utility model has the following beneficial effects:

[0016] 1. In the utility model, the double-layer filling layer composed of the filling layer 1 and the filling layer 2 can provide better mechanical protection, reduce the damage to the cable caused by external impact and extrusion, and improve the absorption performance of impact and extrusion force, and cooperate with the strengthening core to improve the tensile resistance and strength of the cable.

[0017] 2. In the utility model, the wear-resistant layer woven by mixing aluminum wire and nylon wire provides rigidity and durability for the surface of the cable, while providing the unique lightweight of nylon, and the aluminum wire increases its toughness and wear resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a schematic diagram of the cross-sectional structure of a solar dual-core photovoltaic cable.

[0019] Legend:

[0020] 1. Inner core; 2. Insulation layer; 3. Protective layer; 4. Filling layer one; 5. Filling layer two; 6. Reinforced core; 7. Flame retardant layer; 8. Waterproof layer; 9. Wear-resistant layer. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Reference Figure 1 The utility model provides an embodiment: a solar dual-core photovoltaic cable, comprising two inner cores 1, the outer surface of the inner core 1 is provided with an insulating layer 2, the outer surface of the two insulating layers 2 is provided with a protective layer 3, the outer surface of the protective layer 3 is connected with a flame retardant layer 7 through a filling layer mainly composed of a filling layer 1 4, a filling layer 2 5 and a reinforcing core 6, the outer surface of the flame retardant layer 7 is provided with a waterproof layer 8, and the outer surface of the waterproof layer 8 is provided with a wear-resistant layer 9; a filling layer 2 5 is provided between the outer surface of the filling layer 1 4 on the outer surface of the protective layer 3 and the inner layer of the flame retardant layer 7, a plurality of reinforcing cores 6 are provided inside the filling layer 2 5, and the plurality of reinforcing cores 6 are equidistantly surrounded inside the filling layer 2 5;

[0023] Specifically, the two inner cores 1 are connected to the solar panel and the solar inverter respectively. The double-layer filling layer composed of the filling layer 1 4 and the filling layer 2 5 can provide better mechanical protection and reduce the damage to the cable caused by external impact and extrusion. The filling material can absorb the impact force and extrusion force, reduce the impact on the internal structure of the cable, and enhance the waterproof performance of the cable. The filling material can fill the gap around the conductor to prevent water and moisture from entering the interior of the cable, thereby improving the reliability and durability of the cable.

[0024] The filling layer 1 4 is made of polyurethane filling glue as a raw material. The polyurethane filling glue has good sealing performance, can fill small surface defects, and prevent the penetration of moisture, gas and other liquids. The filling layer 2 5 is made of epoxy resin filling glue as a raw material. The epoxy resin filling glue uses its good high temperature resistance and corrosion resistance to protect the reinforcing core 6 and further improve the sealing performance, and uses its excellent mechanical properties to improve the tensile resistance. The reinforcing core 6 is made of steel wire, and filling the steel wire helps to increase the overall strength and tensile resistance of the cable;

[0025] The protective layer 3 is made of silicone rubber as a raw material. The silicone rubber has good elasticity and softness, and can provide excellent sealing performance and buffering performance, so as to protect the insulating layer 2 and the inner core 1 arranged in the inner layer;

[0026] The insulating layer 2 is made of cross-linked polyethylene as a raw material; the flame retardant layer 7 is made of flame retardant cross-linked polyethylene as a raw material. The cross-linking treatment of polyethylene also improves the mechanical strength and rigidity of polyethylene, and has good electrical insulation. The cross-linked polyethylene with flame retardant added has the characteristics of preventing combustion, maintaining stability at higher temperatures, and not being easy to soften or melt while retaining the aging resistance of polyethylene.

[0027] The waterproof layer 8 is made of propylene rubber as a raw material. The propylene rubber has excellent elasticity, wear resistance and cold resistance, and also has good waterproof performance and electrical insulation performance, so as to prevent moisture and water from entering the interior of the cable;

[0028] The wear-resistant layer 9 is formed by weaving a mixture of aluminum wire and nylon wire. The wear-resistant layer 9 formed by weaving a mixture of aluminum wire and nylon wire provides rigidity and durability to the surface of the cable, while providing the unique lightweight of nylon and increasing its toughness and wear resistance due to the aluminum wire.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A solar dual-core photovoltaic cable, comprising two inner cores (1), characterized in that: The outer surface of the inner core (1) is provided with an insulating layer (2), the outer surfaces of the two insulating layers (2) are provided with a protective layer (3), the outer surface of the protective layer (3) is connected to a flame retardant layer (7) via a filling layer, the outer surface of the flame retardant layer (7) is provided with a waterproof layer (8), and the outer surface of the waterproof layer (8) is provided with a wear-resistant layer (9).

2. A solar dual-core photovoltaic cable according to claim 1, characterized in that: The filling layer comprises a filling layer 1 (4) arranged on the outer surface of the protective layer (3), a filling layer 2 (5) is arranged between the outer surface of the filling layer 1 (4) and the inner surface of the flame retardant layer (7), and a plurality of reinforcing cores (6) are arranged inside the filling layer 2 (5), and the plurality of reinforcing cores (6) are equidistantly surrounded inside the filling layer 2 (5).

3. A solar dual-core photovoltaic cable according to claim 2, characterized in that: The first filling layer (4) is made of polyurethane filling glue as raw material, the second filling layer (5) is made of epoxy resin filling glue as raw material, and the reinforcing core (6) is made of steel wire.

4. A solar dual-core photovoltaic cable according to claim 1, characterized in that: The insulating layer (2) is prepared using cross-linked polyethylene as a raw material.

5. A solar dual-core photovoltaic cable according to claim 1, characterized in that: The protective layer (3) is prepared using silicone rubber as raw material.

6. A solar dual-core photovoltaic cable according to claim 1, characterized in that: The flame retardant layer (7) is prepared using flame retardant cross-linked polyethylene as a raw material.

7. A solar dual-core photovoltaic cable according to claim 1, characterized in that: The waterproof layer (8) is prepared using propylene rubber as raw material.

8. A solar dual-core photovoltaic cable according to claim 1, characterized in that: The wear-resistant layer (9) is formed by mixing and weaving aluminum wire and nylon wire.

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