Solar photovoltaic cable for plateau

Abstract

The utility model provides a solar photovoltaic cable for plateau, which relates to the technical field of cables, and comprises a conductor, a filling layer, an irradiation crosslinking insulating layer, a waterproof layer, a fiber braid layer, a metal braid layer and a composite weather-proof sheath, the irradiation crosslinking insulating layer is coated outside the conductor, the filling layer is filled between the conductor and the irradiation crosslinking insulating layer, and the waterproof layer is coated outside the fiber braid layer. The irradiation crosslinking insulating layer is wrapped by the waterproof layer, the waterproof layer is wrapped by the fiber braid layer, the fiber braid layer is wrapped by the metal braid layer, and the metal braid layer is wrapped by the composite weather-resistant sheath. The solar photovoltaic cable for the plateau can improve heat resistance and cold resistance of the solar photovoltaic cable for the plateau.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field, concretely relates to a solar photovoltaic cable for plateau. BACKGROUND

[0002] The photovoltaic cable refers to the connection cable between the battery and the inverter, the connection cable between the battery square and the controller or the DC junction box in the DC side (the part between the photovoltaic cell and the inverter terminal) of the photovoltaic power generation system. In the western part of China, most of the territory is between 1000m-4500m in high altitude. Under the plateau environment, the photovoltaic cable will face long ultraviolet radiation time, large diurnal temperature difference, and in some areas, the ground temperature in summer will exceed 60 DEG C, and the temperature in winter will reduce to 60 DEG C. Therefore, compared with the photovoltaic cable used in the plain area, the photovoltaic cable used in the plateau area not only needs more superior ultraviolet resistance performance, but also needs to improve the heat resistance and cold resistance performance. SUMMARY

[0003] In order to overcome the problems in the background art, the utility model provides a solar photovoltaic cable for plateau, which improves the heat resistance and cold resistance performance of the solar photovoltaic cable for plateau.

[0004] To achieve the above purpose, the utility model is realized through the following technical schemes:

[0005] A solar photovoltaic cable for plateau, comprising a conductor, a filling layer, an irradiation cross-linking insulation layer, a waterproof layer, a fiber braided layer, a metal braided layer and a composite weather-proof sheath, the irradiation cross-linking insulation layer is wrapped outside the conductor, the filling layer is filled between the conductor and the irradiation cross-linking insulation layer, the waterproof layer is wrapped outside the irradiation cross-linking insulation layer, the fiber braided layer is wrapped outside the waterproof layer, the metal braided layer is wrapped outside the fiber braided layer, and the composite weather-proof sheath is wrapped outside the metal braided layer.

[0006] Further, the composite weather-proof sheath is a composite weather-proof sheath formed by repeatedly and alternately compounding a cross-linked polyethylene intermediate layer, a low-temperature polyolefin cold-resistant coating, a silicone rubber heat-resistant layer and a polytetrafluoroethylene ultraviolet-resistant coating from inside to outside.

[0007] Further, the metal braided layer is a copper wire braided layer.

[0008] Further, the fiber braided layer is a fiber braided layer made of aramid fiber.

[0009] Further, the waterproof layer is a waterproof layer made of butyl rubber.

[0010] Further, the irradiation cross-linking insulation layer is an annular sheath made of irradiation cross-linking polyolefin.

[0011] Further, the conductor is a stranded conductor made of oxygen-free copper or fine-grain copper.

[0012] The utility model discloses the beneficial effect:

[0013] The utility model discloses

[0014] The utility model discloses a kind of highland solar photovoltaic cables, refer to The utility model discloses the beneficial effect:

[0015] To clearly illustrate the technical scheme in the embodiment of the utility model, the drawing used in the embodiment description is described.

[0016] Fig. 1 It is the whole structure schematic diagram of the utility model;

[0017] Fig. 2 It is the cross section structure schematic diagram of the utility model.

[0018] 1-conductor, 2-filling layer, 3-irradiation crosslinking insulation layer, 4-waterproof layer, 5-fiber braided layer, 6-metal braided layer, 7-composite weather-proof sheath, 71-crosslinked polyethylene intermediate layer, 72-low temperature polyolefin cold-resistant coating, 73-silicone rubber heat-resistant layer, 74-tetrafluoroethylene ultraviolet resistant coating. Specific implementation

[0019] In order to make the purpose, technical scheme and beneficial effect of the utility model more clear, the preferred embodiment of the utility model will be described in detail below, with the drawings, to facilitate the understanding of technical personnel.

[0020] The utility model discloses a kind of highland solar photovoltaic cables, refer to Figs. 1-2 A kind of highland solar photovoltaic cable, including conductor 1, filling layer 2, irradiation crosslinking insulation layer 3, waterproof layer 4, fiber braided layer 5, metal braided layer 6, composite weather-proof sheath 7, the irradiation crosslinking insulation layer 3 is covered in conductor 1 outer side, the filling layer 2 is filled between conductor 1 and irradiation crosslinking insulation layer 3, the waterproof layer 4 is covered in irradiation crosslinking insulation layer 3 outer side, the fiber braided layer 5 is covered in waterproof layer 4 outer side, the metal braided layer 6 is covered in fiber braided layer 5 outer side, the composite weather-proof sheath 7 is covered in metal braided layer 6 outer side.

[0021] The composite weather-resistant sheath 7 can improve the cable's cold resistance, high temperature resistance and UV resistance in high-altitude photovoltaic applications, and has good weather resistance. The metal braided layer 6 and fiber braided layer 5 can improve the cable's strength. The waterproof layer 4 can prevent moisture from penetrating the cable's interior. The irradiated cross-linked insulation layer 3 can prevent the conductor from being exposed to the outside and oxidizing and getting electric shock, ensuring the long-term reliability of the conductor 1. The filler layer 2 can enhance the insulation performance. The conductor 1 serves as the transmission medium.

[0022] See Figs. 1-2 The composite weather-resistant sheath 7 is formed by repeatedly and alternately compounding a cross-linked polyethylene intermediate layer 71, a low-temperature polyolefin cold-resistant coating 72, a silicone rubber heat-resistant layer 73, and a polytetrafluoroethylene UV-resistant coating 74 from the inside out. The cross-linked polyethylene intermediate layer 71 has good electrical insulation and high temperature resistance, making it suitable for cables used in high-temperature environments. The low-temperature polyolefin cold-resistant coating 72 can ensure that the cable does not crack in cold environments, maintains its flexibility, and reduces the decline in conductivity at extremely low temperatures. The silicone rubber heat-resistant layer 73 can effectively protect the cable from damage under extreme high-temperature conditions while maintaining the cable's electrical performance. The polytetrafluoroethylene UV-resistant coating 74 can protect the cable from aging, embrittlement, and breakage caused by sunlight exposure, and has long-term weather resistance, ensuring that the cable can be used for a long time under harsh sunlight.

[0023] See Figs. 1-2 The metal braided layer 6 is a copper wire braided layer, which has the effects of shielding and heat conduction.

[0024] See Figs. 1-2 The fiber braided layer 5 is made of aramid fiber and has tensile and heat resistance.

[0025] See Figs. 1-2 The waterproof layer 4 is made of butyl rubber and has extremely low water vapor permeability, good weather resistance, ozone resistance and flexibility.

[0026] See Figs. 1-2 The irradiated cross-linked insulation layer 3 is an annular sheath made of irradiated cross-linked polyolefin, which has insulation and weather resistance properties.

[0027] See Figs. 1-2 The conductor 1 is a stranded conductor made of oxygen-free copper or fine-grained copper. In environments with large temperature differences between day and night, the stranded conductor can reduce fatigue and damage caused by thermal expansion and contraction.

[0028] Work process:

[0029] The composite weather-resistant sheath 7 can resist strong ultraviolet rays in high-altitude environments and is resistant to cold and heat. Even after the outer layer is worn, the inner layer can still function. The metal braided layer 6 and the fiber braided layer 5 can improve the cable strength. The metal braided layer 6 can shield and conduct heat, while the fiber braided layer 5 can resist tension and heat. The conductor 1 is a stranded conductor made of oxygen-free copper or fine-grained copper. In environments with large temperature differences between day and night, the stranded conductor can reduce fatigue and damage caused by thermal expansion and contraction.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A solar photovoltaic cable for use in high-altitude areas, characterized in that: The device includes a conductor (1), a filler layer (2), an irradiated cross-linked insulation layer (3), a waterproof layer (4), a fiber braided layer (5), a metal braided layer (6), and a composite weather-resistant sheath (7). The irradiated cross-linked insulation layer (3) covers the outside of the conductor (1), the filler layer (2) fills the space between the conductor (1) and the irradiated cross-linked insulation layer (3), the waterproof layer (4) covers the outside of the irradiated cross-linked insulation layer (3), the fiber braided layer (5) covers the outside of the waterproof layer (4), the metal braided layer (6) covers the outside of the fiber braided layer (5), and the composite weather-resistant sheath (7) covers the outside of the metal braided layer (6).

2. The solar photovoltaic cable for high-altitude applications according to claim 1, characterized in that: The composite weather-resistant sheath (7) is a composite weather-resistant sheath (7) formed by repeatedly and alternately compounding cross-linked polyethylene intermediate layer (71), low-temperature polyolefin cold-resistant coating (72), silicone rubber heat-resistant layer (73) and polytetrafluoroethylene UV-resistant coating (74) from the inside to the outside.

3. The solar photovoltaic cable for high-altitude applications according to claim 1, characterized in that: The metal braided layer (6) is a copper wire braided layer.

4. The solar photovoltaic cable for high-altitude applications according to claim 1, characterized in that: The fiber braided layer (5) is a fiber braided layer (5) made of aramid fibers.

5. The solar photovoltaic cable for high-altitude applications according to claim 1, characterized in that: The waterproof layer (4) is a waterproof layer (4) made of butyl rubber.

6. The solar photovoltaic cable for high-altitude applications according to claim 1, characterized in that: The irradiated cross-linked insulating layer (3) is an annular sheath made of irradiated cross-linked polyolefin.

7. The solar photovoltaic cable for high-altitude applications according to claim 1, characterized in that: The conductor (1) is a stranded conductor made of oxygen-free copper or fine-grained copper.

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