Photovoltaic cable with self-floating water-blocking function

Abstract

The utility model provides a photovoltaic cable with a self-floating water-blocking function, and the cable comprises a plurality of wire cores, insulating layers which wrap the peripheries of the wire cores, a water-blocking layer group which wraps the peripheries of the insulating layers, a buoyancy filling assembly which is disposed between the insulating layers and the water-blocking layer group, and a reinforcing layer group which wraps the peripheries of the water-blocking layers. The buoyancy filling assemblies are made of materials with the buoyancy density ranging from 0.78 g / cm < 3 > to 0.85 g / cm < 3 >, after the buoyancy filling assemblies are filled in the cable, the cable can be laid on the sea surface by means of the buoyancy of the cable, the cable does not need to be arranged on a floating body support, the cable can be directly placed on the sea surface to complete cable routing work, the cable routing difficulty is reduced, and the service life of the cable is prolonged. The cable can be prevented from being directly exposed in the sun, the aging speed of the cable is reduced, the service life of the cable is prolonged, and the cable has the advantages of simple structure, labor cost saving and convenience in popularization and implementation.

Description

Technical Field

[0001] This application belongs to the field of marine photovoltaic cable production technology, specifically relating to a photovoltaic cable with self-floating water-blocking function. Background Technology

[0002] In the existing technology, marine photovoltaic cables are an important component of marine photovoltaic power generation systems, mainly used to transmit the electrical energy generated by photovoltaic modules. Due to the special characteristics of the marine environment, such as high humidity, high salt spray, strong winds and waves, large tidal range, and the impact of floating ice, marine photovoltaic cables need to have higher corrosion resistance, weather resistance, and mechanical strength.

[0003] In existing technologies, traditional offshore photovoltaic cables can only be laid on specialized floating supports. The entire laying process is independent of the support, making the laying difficult and prone to damaging the cable sheath. Furthermore, because the cables are laid on floating bodies on the water surface, the lifespan of the cables and optical fibers is reduced due to constant swaying from wind and waves and exposure to sunlight. Moreover, the floating supports must be designed separately according to the cable size, resulting in high floating support costs, low cable laying efficiency, and high operation and maintenance costs. Finally, once the cables are damaged, repairs are difficult, time-consuming, and result in significant economic losses. Long-term exposure to humid environments makes the cables susceptible to changes in humidity and heat, accelerating material aging and affecting the insulation and sheath performance of the cables. Therefore, there is an urgent need for improvements. Utility Model Content

[0004] In order to address the technical problems in the prior art, traditional marine photovoltaic cables can only be laid on special floating supports. On the one hand, the floating supports need to be customized according to the cable size. On the other hand, it significantly increases the difficulty of cable routing, requiring the installation of the floating supports first, and then laying the cable on the supports. Moreover, the installation stability is low, and it is easily affected by the constant swaying of the sea surface and the influence of sunlight. The cable has a short service life and high maintenance costs. Therefore, this application proposes a photovoltaic cable with self-floating and water-blocking function.

[0005] This application adopts the following scheme: a photovoltaic cable with self-floating water-blocking function, comprising multiple cores, an insulation layer covering the outer periphery of each core, a water-blocking layer group covering the insulation layer and the outer periphery of the insulation layer, a buoyancy filling component filling the space between the insulation layer and the water-blocking layer group, and a reinforcing layer group covering the outer periphery of the water-blocking layer group. Multiple buoyancy filling components are provided, and the material of the buoyancy filling components is any one or more of foam, polystyrene, low-density polyethylene, linear low-density polyethylene, and polypropylene. The density of the buoyancy filling components is 0.78 g / cm³. 3 -0.85g / cm 3 .

[0006] In actual implementation, the cross-sectional shape of the buoyancy filling component can be any one of a circle, annular, or ellipse.

[0007] In some possible embodiments, the core is made of N strands of conductor wire twisted together, the conductor wire being a Class VI copper conductor, and the value of N being a positive integer ranging from 2 to 32.

[0008] In some possible embodiments, the insulating layer is made of cross-linked polyethylene.

[0009] In some possible embodiments, the wire core has M wires, where M is a positive integer ranging from 2 to 8.

[0010] In some possible embodiments, the water-blocking layer assembly includes a water-blocking layer covering the outer periphery of the insulating layer, a water-blocking filler filling the space between the water-blocking layer and the insulating layer, the water-blocking filler covering the outer periphery of the buoyancy filling component, and the thickness of the water-blocking layer being less than the thickness of the insulating layer.

[0011] In some possible embodiments, the water-blocking layer is made of any one of polyester fiber, polyamide fiber, polyester fiber or polypropylene fiber.

[0012] In some possible embodiments, the water-blocking filler is made of nylon fiber or Teflon polyvinyl chloride.

[0013] In some possible embodiments, the reinforcing layer group includes a reinforcing layer covering the outer periphery of the water-blocking layer, and a sheath layer covering the outer periphery of the reinforcing layer, the thickness of the sheath layer being greater than that of the reinforcing layer.

[0014] In some possible embodiments, the reinforcing layer is made of PE, and the sheath layer is made of halogen-free cross-linked polyethylene.

[0015] Compared with the prior art, this application has the following beneficial effects:

[0016] This application provides a photovoltaic cable with self-floating water-blocking function, comprising multiple cores, an insulation layer covering the outer periphery of each core, a water-blocking layer assembly covering the outer periphery of the insulation layer, a buoyancy filler assembly filling the space between the insulation layer and the water-blocking layer assembly, and a reinforcing layer assembly covering the outer periphery of the water-blocking layer. Multiple buoyancy filler assemblies are provided, and the buoyancy filler assemblies are selected with a buoyancy density of 0.78 g / cm³. 3 -0.85g / cm 3The material, when the buoyancy filling component is filled inside the cable, allows the cable to be laid on the sea surface by its own buoyancy. There is no need to set up a floating support; the cable can be placed directly on the sea surface to complete the cable laying work, reducing the difficulty of cable laying, avoiding direct exposure of the cable to sunlight, reducing the aging rate of the cable, and increasing the service life of the cable. It has the advantages of simple structure, saving labor costs, and easy promotion and implementation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the cross-sectional structure of a photovoltaic cable with self-floating water-blocking function according to this application. Detailed Implementation

[0018] Combination Figure 1 The content shown further illustrates the technical solution provided in this application: a photovoltaic cable with self-floating water-blocking function, comprising multiple cores 1, an insulation layer 2 covering the outer periphery of each core 1, a water-blocking layer group 3 covering the insulation layer 2 and the outer periphery of the insulation layer 2, a buoyancy filling component 4 filling the space between the insulation layer 2 and the water-blocking layer group 3, and a reinforcing layer group 5 covering the outer periphery of the water-blocking layer group 3. Multiple buoyancy filling components 4 are provided, and the material of the buoyancy filling components 4 is any one or more of foam, polystyrene, low-density polyethylene, linear low-density polyethylene, and polypropylene. The density of the buoyancy filling components 4 is 0.78 g / cm³. 3 -0.85g / cm 3 .

[0019] In this embodiment, the core 1 is made of N strands of conductor wire twisted together. The material of the conductor wire is a type VI copper conductor, and the value of N is a positive integer ranging from 2 to 32.

[0020] In actual implementation, for example, the value of N is 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32.

[0021] In practical implementation, by selecting an appropriate type 6 copper conductor material as the material for the conductor wire, and combining it with a reasonable N value setting, the electrical performance of the conductor can be effectively improved, the current carrying capacity of the conductor can be enhanced, and the energy loss of the conductor during transmission can be reduced, thereby improving the efficiency and stability of the overall circuit and meeting the specific requirements of different application scenarios for conductor performance.

[0022] In this embodiment, the insulating layer 2 is made of cross-linked polyethylene.

[0023] In actual implementation, cross-linked polyethylene is used as the material for insulation layer 2. This material has good electrical insulation properties and high temperature stability, which can effectively prevent current leakage and insulation aging, thereby improving the safety and service life of the entire system.

[0024] In this embodiment, the wire core 1 has M wires, and the value of M is a positive integer ranging from 2 to 8.

[0025] In actual implementation, for example, the value of M can be 2, 3, 4, 5, 6, 7, or 8.

[0026] In this embodiment, the water-blocking layer group 3 includes a water-blocking layer 30 covering the outer periphery of the insulating layer 2, a water-blocking filler 31 filling the space between the water-blocking layer 30 and the insulating layer 2, the water-blocking filler 31 covering the outer periphery of the buoyancy filling component 4, and the thickness of the water-blocking layer 30 being less than the thickness of the insulating layer 2.

[0027] In actual implementation, by setting up a water-blocking layer group including a water-blocking layer covering the outer periphery of the insulation layer and a water-blocking filler between the water-blocking layer and the insulation layer, as well as a design that covers the buoyancy filler component with the water-blocking filler, moisture is effectively prevented from penetrating the insulation layer. At the same time, it is ensured that the buoyancy filler component can play a buoyancy role, thereby achieving good waterproof and moisture-proof performance and buoyancy effect, ensuring the reliability and safety of the entire equipment.

[0028] In this embodiment, the water-blocking layer 30 is made of any one of polyester fiber, polyamide fiber, polyester fiber, or polypropylene fiber.

[0029] In actual implementation, by selecting any one of polyester fiber, polyamide fiber, polyester fiber or polypropylene fiber as the material of the water-blocking layer 30, moisture can be effectively isolated, ensuring that the water-blocking layer has good waterproof performance, thereby improving the waterproof effect of the overall structure.

[0030] In this embodiment, the water-blocking filler 31 is made of nylon fiber or Teflon polyvinyl chloride.

[0031] In this embodiment, the reinforcing layer group 5 includes a reinforcing layer 50 covering the outer periphery of the water-blocking layer 30, and a sheath layer 51 covering the outer periphery of the reinforcing layer 50. The thickness of the sheath layer 51 is greater than that of the reinforcing layer 50.

[0032] In actual implementation, a reinforcing layer 50 and a sheath layer 51 are sequentially wrapped around the water-blocking layer 30 to form a reinforcing layer group 5. The thickness of the sheath layer 51 is greater than that of the reinforcing layer 50, which effectively improves the strength and durability of the structure, while ensuring good water-blocking performance and enhancing the overall protection effect of the cable. It is suitable for application scenarios that require high mechanical strength and water-blocking performance.

[0033] In this embodiment, the reinforcing layer 50 is made of PE, and the sheath layer 51 is made of halogen-free cross-linked polyethylene.

[0034] The above are merely embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A photovoltaic cable with self-floating water-blocking function, characterized in that, The application comprises a plurality of wire cores (1), an insulating layer (2) covering the outer periphery of each wire core (1), a water-blocking layer group (3) covering the insulating layer (2), a plurality of buoyancy filling components (4) filled between the insulating layer (2) and the water-blocking layer group (3), and a reinforcing layer group (5) covering the outer periphery of the water-blocking layer group (3). The material of the buoyancy filling component (4) is any one of foam, polystyrene, low-density polyethylene, linear low-density polyethylene, and polypropylene. The density of the buoyancy filling component (4) is 0.78-0.85 g / cm 3 -0.85g / cm 3 .

2. The photovoltaic cable with self-floating water-blocking function according to claim 1, characterized in that, The wire core (1) is twisted by N single conductors, the material of the single conductor is the sixth type of copper conductor, and the value range of N is a positive integer of 2-32.

3. The photovoltaic cable with self-floating water-blocking function according to claim 1, characterized in that, The material of the insulation layer (2) is cross-linked polyethylene.

4. The photovoltaic cable with self-floating water-blocking function according to claim 1, characterized in that, The wire core (1) is provided with M roots, and the value range of M is a positive integer of 2-8.

5. The photovoltaic cable with self-floating water-blocking function according to claim 1, characterized in that, The water-blocking layer group (3) comprises a water-blocking layer (30) wrapped on the outer periphery of the insulation layer (2), a water-blocking filler (31) filled between the water-blocking layer (30) and the insulation layer (2), and the water-blocking filler (31) is wrapped on the outer periphery of the buoyancy filling assembly (4), and the thickness of the water-blocking layer (30) is less than the thickness of the insulation layer (2).

6. The photovoltaic cable with self-floating water-blocking function according to claim 5, characterized in that, The material of the water-blocking layer (30) is any one of polyester fiber, polyamide fiber, dacron fiber or polypropylene fiber.

7. The photovoltaic cable with self-floating water-blocking function according to claim 5, characterized in that, The material of the water-blocking filler (31) is nylon fiber or Teflon polyvinyl chloride.

8. The photovoltaic cable with self-floating water-blocking function according to claim 5, characterized in that, The reinforcing layer group (5) comprises a reinforcing layer (50) wrapped on the outer periphery of the water-blocking layer (30), and a sheath layer (51) wrapped on the outer periphery of the reinforcing layer (50), and the thickness of the sheath layer (51) is greater than the reinforcing layer (50).

9. The photovoltaic cable with self-floating water-blocking function according to claim 8, characterized in that, The material of the reinforcing layer (50) is PE, and the material of the sheath layer (51) is halogen-free cross-linked polyethylene.

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