Thermal-insulation high-temperature-resistant cable for photovoltaic system
By using cable structures such as annealed soft copper wire, polyester TPU plastic, aerogel insulation film and polyether TPU plastic in cables for photovoltaic systems, the existing cables are solved in the heat insulation and resistance of high temperature environments. The problem of insufficient high temperature performance achieves higher safety and cable life.
Patent Information
- Application Number
- CN202421194896.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-05-29
AI Technical Summary
It is difficult for existing cables for photovoltaic systems to ensure heat insulation and high temperature resistance in high temperature environments, resulting in poor safety and short cable life.
A cable structure including a conductive core, an insulating layer, a heat insulation layer and a protective layer are adopted. The conductive core is an annealed soft copper wire, the insulating layer is polyester TPU plastic, the insulating layer is an aerogel heat insulation film, and the protective layer is Polyether TPU plastics improve the thermal insulation and high temperature resistance of cables through specific materials and structural designs.
It realizes good thermal insulation and high temperature resistance of cables in high temperature environments, and improves the safety and life of cables.
Smart Images
Figure CN222530084U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cables, in particular to a heat-insulating and high-temperature-resistant cable for a photovoltaic system. Background Art
[0002] As a green and sustainable energy technology, photovoltaic power generation not only helps alleviate environmental pollution and climate change problems, but has also been widely promoted and applied around the world.
[0003] Photovoltaic system cables are an important part of photovoltaic power generation. With the continuous development of photovoltaic power generation technology, the performance requirements of cables will increase. Many photovoltaic systems are laid in places with long sunshine hours. When used in high temperature environments, cables are required to have good heat insulation and high temperature resistance. The normal working temperature of conventional cables is only 70℃. If they work in high temperature and sunny places for a long time, their safety cannot be guaranteed and the life of the cables is short. Utility Model Content
[0004] In view of the above problems, the utility model provides a heat-insulating and high-temperature-resistant cable for a photovoltaic system; the cable has heat-insulating and high-temperature-resistant properties.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a heat-insulating and high-temperature resistant cable for a photovoltaic system, comprising a conductive core, an insulating layer, a thermal insulating layer and a protective layer, the outer surface of the conductive core is fixed with an insulating layer, the outer surface of the insulating layer is provided with a thermal insulating layer, the thermal insulating layer is fixed with a protective layer, the conductive core is made of annealed soft copper wire, the insulating layer is made of polyester TPU plastic, the thermal insulating layer is made of an aerogel thermal insulating film, and the protective layer is made of polyether TPU plastic.
[0006] Preferably, the conductive core is formed by twisting annealed soft copper monofilaments, and the pitch of the monofilaments during twisting is 12 to 14 times the diameter after twisting.
[0007] Preferably, the insulating layer is uniformly fixed on the outer wall of the conductive core by a process of high-temperature melting followed by extrusion coating, and the thickness of the insulating layer is in the range of 0.7 to 0.8 mm.
[0008] Preferably, the thickness of the thermal insulation layer is 0.15 mm, and the thermal insulation layer is fixed to the outer wall of the insulating layer by wrapping in a right-hand overlapping manner, and the width of the right-hand winding overlapping part of the thermal insulation layer is in the range of 5 to 10 mm.
[0009] Preferably, the protective layer is fixed to the outer wall of the thermal insulation layer by a process of high-temperature melting followed by extrusion coating, and the thickness of the protective layer is in the range of 0.6 to 0.7 mm.
[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0011] 1. The conductive core is formed by tightly pressing and twisting the annealed soft copper wire at a pitch diameter ratio of 12 to 14 times, ensuring that the conductive core has good flexibility and is easy to bend, which is convenient for power transmission in the mobile environment of the photovoltaic system; at the same time, multiple soft copper wires twisted by annealed soft copper wire form a conductive core, which also provides a good heat dissipation channel for the conductive core as a whole. The insulating layer is made of polyester TPU plastic. Polyester TPU has good insulation performance and high temperature resistance, and its thermal conductivity is only 0.024W / (m·k), which plays an insulating role and heat insulation and high temperature resistance effect.
[0012] 2. The thermal insulation layer is formed by the aerogel thermal insulation film, and the thermal conductivity of the aerogel thermal insulation film is only 0.018W / (m·k). The thermal insulation layer has the effects of heat insulation, heat dissipation and high temperature resistance on the conductive core and the insulating layer. The protective layer is formed by the polyether TPU plastic, and the thermal conductivity of the polyether TPU plastic is only 0.024W / (m·k). At the same time, in outdoor environments such as strong ultraviolet rays and high temperatures, the protective layer protects the conductive core and has the effects of heat insulation and high temperature resistance. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of a partial overall structure of the utility model;
[0014] Figure 2 It is a partial cross-sectional schematic diagram of the utility model;
[0015] Figure 3 This is a schematic diagram of the explosion splitting of the utility model;
[0016] Figure 4 It is a front view schematic diagram of the utility model.
[0017] Notes in the figure: 1. Conductive core; 2. Insulation layer; 3. Heat insulation layer; 4. Protective layer. DETAILED DESCRIPTION
[0018] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.
[0019] See also Figure 2 and Figure 3, a heat-insulating and high-temperature resistant photovoltaic system cable, comprising a conductive core 1, an insulating layer 2, a heat-insulating layer 3 and a protective layer 4, the outer surface of the conductive core 1 is fixed with an insulating layer 2, the outer surface of the insulating layer 2 is provided with a heat-insulating layer 3, the heat-insulating layer 3 is fixed with a protective layer 4, the conductive core 1 is made of annealed soft copper wire, the conductive core 1 is twisted by the fifth type of annealed soft copper wire in GB / T3956, when the annealed soft copper wire is twisted, the ratio of the pitch of the single wire to the diameter after twisting is set to 12 to 14 times, and at the same time, according to the size of the electric energy transmitted by the photovoltaic system and the nominal DC resistance value in GB / T3956, the single wire diameter and the number of strands of the fifth type of annealed soft copper wire are set;
[0020] Furthermore, the conductive core 1 has good flexibility and bendability, which is convenient for power transmission in a mobile photovoltaic system environment; at the same time, the conductive core 1 is formed by a plurality of soft copper wires twisted by annealing soft copper wires, which also provides a good heat dissipation channel for the conductive core 1 as a whole.
[0021] See also Figure 1 and Figure 2 The insulating layer 2 is made of polyester TPU plastic. After the polyester TPU plastic is melted in the extruder through the feeding section, plasticizing section, and melting section at a temperature of 180 to 220° C., the coating thickness is set to 0.7 to 0.8 mm, and the insulating layer 2 is uniformly extruded and coated around the conductive core 1. The extruder is an existing device and will not be described in detail here.
[0022] Furthermore, polyester TPU has not only good insulation properties and high temperature resistance, oil resistance, wear resistance, and ozone resistance, but also has a thermal conductivity of only 0.024W / (m·k), which can play a good insulation role and heat insulation and high temperature resistance effect.
[0023] See also Figure 2 and Figure 3 The material of the thermal insulation layer 3 is an aerogel thermal insulation film with a thickness of 0.15 mm. The aerogel thermal insulation film is evenly wrapped around the insulating layer 2 by overlapping and wrapping in the right direction to form the thermal insulation layer 3. The width of the overlapping part of the aerogel thermal insulation film is between 5 and 10 mm.
[0024] Furthermore, the aerogel thermal insulation film is synthesized with nano-silicon dioxide aerogel as the main material, and has the characteristics of high temperature resistance, low density, high strength, and waterproofness. Its thermal conductivity is only 0.018W / (m·k), which can play a good role in heat insulation, heat dissipation and high temperature resistance.
[0025] See also Figure 1 and Figure 4The material of the protective layer 4 is polyether TPU plastic. After the polyether TPU plastic is melted in the extruder through the feeding section, the plasticizing section, and the melting section at a temperature of 170 to 210°C, the coating thickness is set to 0.6 to 0.7 mm, and the protective layer 4 is uniformly extruded and coated around the thermal insulation layer 3;
[0026] Furthermore, the polyether TPU plastic has the properties of high temperature resistance, oil resistance, ozone resistance, wear resistance, and UV resistance, and its thermal conductivity is only 0.024W / (m·k). In outdoor environments with strong ultraviolet rays and high temperatures, the protective layer 4 formed by the polyether TPU plastic can protect the cable core and has heat insulation and high temperature resistance effects.
[0027] The production process of this utility model:
[0028] First, according to the amount of electric energy transmitted by the photovoltaic system and the nominal DC resistance value in GB / T3956, the diameter and number of the single wires of the fifth type of annealed soft copper wires are set, the annealed soft copper wires are twisted, and the ratio of the pitch of the single wires to the diameter after twisting is set to 12 to 14 times to form a conductive core 1, and then the polyester TPU plastic is used in an extruder through a feeding section, a plasticizing section, and a melting section. After high-temperature melting, the coating thickness is set to 0.7 to 0.8 mm, and the molten polyester TPU plastic is uniformly extruded and coated on the conductive core 1 An insulating layer 2 is formed on the outer wall, and then an aerogel insulation film with a thickness of 0.15 mm is evenly wrapped around the insulation layer 2 in the right overlapping manner to form a thermal insulation layer 3, and the width of the overlapping part of the aerogel insulation film is between 5 and 10 mm. Finally, the polyether TPU plastic is melted in an extruder through the feeding section, plasticizing section, and melting section at a temperature of 170 to 210°C. The coating thickness is set to 0.6 to 0.7 mm, and the molten polyether TPU plastic is evenly extruded and coated around the thermal insulation layer 3 to form a protective layer 4. After cooling, the cable is formed.
[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A heat-insulating and high-temperature resistant photovoltaic system cable, characterized in that: The invention comprises a conductive core (1), an insulating layer (2), a heat insulating layer (3) and a protective layer (4); the conductive core (1) is fixed with an insulating layer (2) on its outer surface; the heat insulating layer (3) is provided with an outer surface of the insulating layer (2); the heat insulating layer (3) is fixed with a protective layer (4); the conductive core (1) is made of annealed soft copper wire; the insulating layer (2) is made of polyester TPU plastic; the heat insulating layer (3) is made of aerogel heat insulating film; and the protective layer (4) is made of polyether TPU plastic.
2. The heat-insulating and high-temperature-resistant photovoltaic system cable according to claim 1, characterized in that: The conductive core (1) is made of annealed soft copper monofilaments twisted together, and the pitch of the monofilaments during twisting is 12 to 14 times the diameter after twisting.
3. The heat-insulating and high-temperature-resistant photovoltaic system cable according to claim 1, characterized in that: The insulating layer (2) is evenly fixed on the outer wall of the conductive core (1) by a process of high-temperature melting followed by extrusion coating, and the thickness of the insulating layer (2) is in the range of 0.7 to 0.8 mm.
4. The heat-insulating and high-temperature-resistant photovoltaic system cable according to claim 1, characterized in that: The thickness of the heat insulation layer (3) is 0.15 mm. The heat insulation layer (3) is fixed to the outer wall of the insulating layer (2) by wrapping in a right-hand overlapping manner. The width of the right-hand overlapping portion of the heat insulation layer (3) is in the range of 5 to 10 mm.
5. The heat-insulating and high-temperature-resistant photovoltaic system cable according to claim 1, characterized in that: The protective layer (4) is fixed to the outer wall of the heat insulation layer (3) by a process of high-temperature melting followed by extrusion coating, and the thickness of the protective layer (4) is in the range of 0.6 to 0.7 mm.