Tensile torsion-resistant cable for overwater photovoltaic system

Abstract

The utility model discloses a tensile torsion-resistant cable for an overwater photovoltaic system. The tensile torsion-resistant cable comprises an aluminum alloy conductor; a carbon fiber reinforced core for improving the overall tensile strength of the cable is arranged in the aluminum alloy conductor in a penetrating manner; the periphery of the aluminum alloy conductor is wrapped by an irradiation crosslinking polyolefin insulating layer used for insulation. The periphery of the irradiation crosslinking polyolefin insulating layer is wrapped by a composite waterproof sheath layer. The periphery of the composite waterproof sheath layer is extruded with a nylon sheath layer which is used for improving the mechanical performance and the anti-corrosion performance of the cable. The tensile torsion-resistant cable for the water photovoltaic system is strong in flexibility, not only improves the overall creep resistance of the cable so as to improve the use safety of the cable, but also reduces the overall weight of the cable, so that the cable is more convenient to install and lay on the water surface, the load of a floating body for supporting the cable can be reduced, and the cost is lower.

Description

Technical Field

[0001] The utility model relates to a tension-resistant and torsion-resistant cable for an above-water photovoltaic system. Background Art

[0002] Floating photovoltaics is to install the photovoltaic system on a floating body on the water surface. This will not only not occupy land resources, but also provide good ventilation and heat dissipation conditions above the water surface. The cooling of the photovoltaic core equipment by the water body can effectively improve the power generation efficiency. However, since the floating power station is installed on the water surface, the water surface environment is complex, so its core demand is safety and reliability. Only safety and stability can ensure long-term benefits. During the use of floating photovoltaics, its cables are exposed to the humid environment on the water surface for a long time and will twist and stretch with the fluctuation of the water surface, which will be severely corroded and stretched. The cables used in existing floating photovoltaic applications use a waterproof sheath to wrap the cable core structure, and its structural strength is not enough. After long-term twisting and stretching, the end of the waterproof sheath is easy to be disconnected and cracks are easy to appear on the surface. The cable is in contact with water for a long time, so moisture will enter the cable through the cracks on the surface of the sheath, resulting in a significant reduction in the insulation performance of the cable, thereby causing insulation breakdown and leakage, which will pose a serious threat to the safety of life and property of fishermen. Utility Model Content

[0003] The utility model provides a tensile and torsion-resistant cable for a water photovoltaic system to solve the above-mentioned technical problems, and specifically adopts the following technical solutions:

[0004] A tensile and torsion-resistant cable for an offshore photovoltaic system comprises: an aluminum alloy conductor; a carbon fiber reinforcement core for improving the tensile strength of the entire cable is inserted into the aluminum alloy conductor; a radiation cross-linked polyolefin insulation layer for insulation is wrapped around the aluminum alloy conductor; a composite waterproof sheath layer is wrapped around the radiation cross-linked polyolefin insulation layer; a nylon sheath layer for improving the mechanical properties and corrosion resistance of the cable is extruded around the composite waterproof sheath layer.

[0005] Furthermore, the aluminum alloy conductor is made by twisting a plurality of aluminum alloy wire bundles.

[0006] Furthermore, a carbon fiber bundle is inserted into the nylon sheath layer to further improve the tensile strength of the cable.

[0007] Furthermore, two ends of the carbon fiber reinforcement core extend out of the ends of the aluminum alloy conductor; two ends of the carbon fiber bundle extend out of the ends of the nylon sheath; and the carbon fiber reinforcement core and the carbon fiber bundle are fixedly connected at corresponding ends of the cable.

[0008] Furthermore, the carbon fiber reinforcement core is formed by twisting a plurality of carbon fiber filaments.

[0009] Furthermore, the composite waterproof sheath layer comprises: an aluminum-plastic composite tape layer and a polyolefin sheath layer; the aluminum-plastic composite tape layer is wrapped around the periphery of the radiation cross-linked polyolefin insulation layer; and the polyolefin sheath layer is extruded around the periphery of the aluminum-plastic composite tape layer.

[0010] Furthermore, the aluminum-plastic composite tape layer is composed of a plurality of aluminum-plastic composite tapes; the plurality of aluminum-plastic composite tapes are extruded and coated on the outer periphery of the radiation cross-linked polyolefin insulation layer along the longitudinal side extending from the cable.

[0011] Furthermore, the nylon sheath layer is made of nylon 12 type material.

[0012] The utility model is beneficial in that the provided tensile and torsion-resistant cable for the water photovoltaic system adopts an aluminum alloy conductor and a carbon fiber reinforcement core, which has strong flexibility. It not only improves the overall creep resistance of the cable, thereby improving the safety of cable use, but also reduces the overall weight of the cable, making it more convenient to install and lay the cable on the water surface, and can reduce the load on the floating body supporting the cable, and the cost is also lower.

[0013] In addition, the tensile and torsion-resistant cable for the floating photovoltaic system adopts a structure combining a composite waterproof sheath layer and a nylon sheath layer, which effectively improves the waterproofness and corrosion resistance. Among them, the surface of the nylon sheath layer is smooth and has high anti-twist performance, which is convenient for dragging and laying the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is a schematic diagram of the tensile and torsion-resistant cable for the water photovoltaic system involved in the present application;

[0016] A tensile and torsion-resistant cable 10 for an offshore photovoltaic system comprises an aluminum alloy conductor 11, a carbon fiber reinforced core 12, a radiation cross-linked polyolefin insulation layer 13, a composite waterproof sheath layer 14, an aluminum-plastic composite tape layer 141, a polyolefin sheath layer 142, a nylon sheath layer 15, and a carbon fiber bundle 16. DETAILED DESCRIPTION

[0017] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0018] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0020] like Figure 1 As shown, a tensile and torsion-resistant cable 10 for a water photovoltaic system of the present application comprises an aluminum alloy conductor 11. Compared with a copper conductor, the cost of the aluminum alloy conductor 11 is about 6 times that of the copper conductor under the same current carrying capacity, and the weight of the copper conductor is about 2 times that of the aluminum conductor, which has low cost and excellent structural performance.

[0021] In this solution, the aluminum alloy conductor 11 is made of a plurality of aluminum alloy wire bundles twisted together. This structure has excellent bendability, with a flexibility increased by 30% compared to copper conductors, and excellent corrosion resistance.

[0022] A carbon fiber reinforcement core 12 is inserted into the aluminum alloy conductor 11. The carbon fiber reinforcement core 12 has the characteristics of being soft, light, and having high tensile strength. The central insertion structure of the carbon fiber reinforcement core 12 can improve the tensile strength of the entire cable. When the cable is towed, the carbon fiber reinforcement core 12 ensures the radial and axial stability of the entire cable, avoids large stretching or even breakage of the internal structure of the cable, and ensures the safety of laying and using the cable.

[0023] The carbon fiber reinforcement core 12 of this solution is composed of multiple carbon fiber strands, and the performance of such a stranded structure is more complex. In other words, the carbon fiber reinforcement core 12 is placed in the center of the cable in a bundled and twisted manner. This structure has excellent softness and fatigue resistance. During use, it can withstand the tension generated by the cable as the water surface fluctuates. Since the aluminum alloy conductor 11 is affected by tension for a long time, creep will occur, and the carbon fiber reinforcement core 12 with a stranded structure inside can effectively solve the creep phenomenon of the aluminum alloy conductor 11.

[0024] The outer periphery of the aluminum alloy conductor 11 is covered with a radiation cross-linked polyolefin insulation layer 13 for insulation. The radiation cross-linked polyolefin insulation layer 13 is an insulation layer of a cross-linked structure obtained by electron irradiation of polyolefin insulation. Such a polymer has high purity, compact structure, and excellent waterproof and moisture-proof properties. Conventional chemical cross-linked polyolefin materials require the addition of a cross-linking agent, and by-products are generated during the cross-linking process, resulting in impurities in the insulation layer. However, radiation cross-linked polyolefin physically cross-links the polyolefin material through high-energy electron collisions, and no by-products are precipitated during the cross-linking process. Therefore, there are no impurities in the polymer structure, the molecular structure is stable, and the waterproof and moisture-proof properties and aging resistance are excellent.

[0025] The outer periphery of the radiation cross-linked polyolefin insulation layer 13 is wrapped with a composite waterproof sheath layer 14. The composite waterproof sheath layer 14 includes: an aluminum-plastic composite tape layer 141 and a polyolefin sheath layer 142. The aluminum-plastic composite tape layer 141 is wrapped around the outer periphery of the radiation cross-linked polyolefin insulation layer 13, and the polyolefin sheath layer 142 is extruded around the outer periphery of the aluminum-plastic composite tape layer 141, thereby forming a comprehensive waterproof layer with a tight structure and better waterproof performance. The longitudinally wrapped aluminum-plastic composite tape is heated at a high temperature before extrusion, so that the aluminum-plastic layer can be better bonded tightly, and the extrusion of the polyolefin sheath layer 142 is produced by an extrusion die, thereby obtaining a comprehensive waterproof layer with a tight structure.

[0026] Furthermore, the aluminum-plastic composite tape layer 141 is composed of a plurality of aluminum-plastic composite tapes, which are extruded and coated on the outer periphery of the radiation cross-linked polyolefin insulation layer 13 along the longitudinal side of the cable. Such a structure not only improves the waterproof performance and fracture resistance of the cable as a whole, but also reduces the amount of aluminum-plastic composite tapes used, which is low in cost and light in weight.

[0027] The outer periphery of the composite waterproof sheath layer 14 is extruded with a nylon sheath layer 15 to improve the mechanical properties and corrosion resistance of the cable. The nylon sheath layer 15 of this solution is made of nylon 12 material, which has chemical stability, high mechanical strength, low water absorption, corrosion resistance, and low temperature resistance, and is more suitable for water environments.

[0028] Therefore, the above-mentioned tensile and torsion-resistant cable 10 for the floating photovoltaic system adopts an aluminum alloy conductor 11 and a carbon fiber reinforced core 12, which has strong flexibility, thereby improving the overall creep resistance of the cable, thereby improving the safety of cable use, and reducing the overall weight of the cable, making it more convenient to install and lay the cable on the water surface, and can reduce the load on the floating body supporting the cable, and the cost is also lower.

[0029] In addition, the cable 10 for the pull-resistant and torsion-resistant water photovoltaic system adopts a structure combining a composite waterproof sheath layer 14 and a nylon sheath layer 15, which effectively improves the waterproofness and corrosion resistance. Among them, the nylon sheath layer 15 has a smooth surface, high hardness, and corrosion resistance, which can prevent water surface biological corrosion and damage to the cable, avoid power accidents caused by water entering the cable, and has good anti-twist performance, which is convenient for dragging and laying cables.

[0030] As a specific implementation, a carbon fiber bundle 16 is inserted into the nylon sheath layer 15 to further improve the tensile strength of the cable.

[0031] Furthermore, both ends of the carbon fiber reinforced core 12 extend out of the ends of the aluminum alloy conductor 11, and both ends of the carbon fiber bundle 16 extend out of the ends of the nylon sheath. When installing and connecting at the end of the cable, the carbon fiber reinforced core 12 and the carbon fiber bundle 16 are fixedly connected at the corresponding ends of the cable, which can effectively prevent the outer layer structure of the cable and the aluminum alloy conductor 11 from separating, thereby avoiding the phenomenon of the outer layer of the cable end being detached, and ensuring the safety of the cable's electrical use.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the above embodiments do not limit the utility model in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the utility model.

Claims

1. A tensile and torsion-resistant cable for a water photovoltaic system, characterized in that: include: Aluminum alloy conductor; The aluminum alloy conductor is provided with a carbon fiber reinforcement core for improving the tensile strength of the entire cable; The outer periphery of the aluminum alloy conductor is covered with a radiation cross-linked polyolefin insulation layer for insulation; The outer periphery of the radiation cross-linked polyolefin insulation layer is covered with a composite waterproof sheath layer; The outer periphery of the composite waterproof sheath layer is extruded with a nylon sheath layer for improving the mechanical property and anti-corrosion property of the cable.

2. The tensile and torsion-resistant cable for a water photovoltaic system according to claim 1, characterized in that: The aluminum alloy conductor is made by twisting a plurality of aluminum alloy wire bundles.

3. The tensile and torsion-resistant cable for a water photovoltaic system according to claim 2, characterized in that: A carbon fiber bundle for further improving the tensile strength of the cable is inserted into the nylon sheath layer.

4. The tensile and torsion-resistant cable for a water photovoltaic system according to claim 3, characterized in that: The two end bundles of the carbon fiber reinforced core extend out of the ends of the aluminum alloy conductor; Both ends of the carbon fiber bundle extend out of the ends of the nylon sheath; The carbon fiber reinforcement core and the carbon fiber bundle are fixedly connected at respective ends of the cable.

5. The tensile and torsion resistant cable for a water photovoltaic system according to claim 1, characterized in that: The carbon fiber reinforcement core is formed by twisting a plurality of carbon fiber filaments.

6. The tensile and torsion resistant cable for a water photovoltaic system according to claim 1, characterized in that: The composite waterproof sheath layer comprises: an aluminum-plastic composite tape layer and a polyolefin sheath layer; The aluminum-plastic composite tape layer is wrapped around the outer periphery of the radiation cross-linked polyolefin insulation layer; The polyolefin sheath layer is extruded onto the outer periphery of the aluminum-plastic composite tape layer.

7. The tensile and torsion-resistant cable for a water photovoltaic system according to claim 6, characterized in that: The aluminum-plastic composite tape layer is composed of a plurality of aluminum-plastic composite tapes; A plurality of the aluminum-plastic composite tapes are extruded and coated on the outer periphery of the radiation cross-linked polyolefin insulation layer along the longitudinal side extending from the cable.

8. The tensile and torsion-resistant cable for a water photovoltaic system according to claim 1, characterized in that: The nylon sheath layer is made of nylon 12 type material.

Images