Corrosion-resistant solar photovoltaic special cable with high conductive efficiency

Abstract

The utility model relates to the technical field of wires and cables, in particular to an anti-corrosion solar photovoltaic special cable with high conductive efficiency, which comprises a support core, a cable core and a cable core, the fan-shaped stranded conductors are stranded on the outer wall of the supporting core; the insulating layer is extruded on the outer wall of the fan-shaped stranded conductor; the outer wall of the insulating layer is coated with the waterproof layer; the outer sheath is extruded on the outer wall of the waterproof layer; wherein the fan-shaped stranded conductor comprises a plurality of layers of stranded structures. According to the photovoltaic cable provided by the utility model, the fan-shaped stranded conductors are adopted, the fan-shaped stranded conductors can improve the filling coefficient and the conductivity, the elastic supporting core is arranged in the middle of the fan-shaped stranded conductors, and the conductors can extrude the supporting core to deform the supporting core when the cable is bent through the arrangement of the elastic core, so that the stress between conductor monofilaments is reduced, and the cable is more flexible. Particularly, better protection can be provided for the monofilament at low temperature, and the water surface photovoltaic cable can be suitable for cold regions.

Description

Technical Field

[0001] This utility model relates to the field of wire and cable technology, and more specifically to corrosion-resistant, high-conductivity solar photovoltaic special cables. Background Technology

[0002] A floating photovoltaic (PV) power station refers to a PV power station built on water. The photovoltaic panels are immersed in the water or mounted on floating structures, converting solar energy into electricity. Because it is built on water, it does not occupy valuable land resources, thus reducing land acquisition costs. Furthermore, due to the cooling effect of the water on the PV modules, the surface temperature of the panels is lower, resulting in higher power generation. With increasing market demand and technological advancements, floating PV power stations will develop towards large-scale, industrialized operations.

[0003] Compared to ordinary photovoltaic cables, cables for floating photovoltaic systems need to be able to resist the erosion of corrosive substances such as water vapor and salt water. In addition, floating photovoltaic cables also need to have good bending performance to adapt to complex installation environments, such as bending and twisting on floating platforms. Therefore, this places higher demands on photovoltaic cables. Utility Model Content

[0004] To address the technical problems existing in current wires and cables, this utility model proposes a corrosion-resistant, high-conductivity solar photovoltaic special cable, comprising:

[0005] The support core is an elastic strip structure with a ring-shaped cross-section;

[0006] A sector-shaped stranded conductor is stranded on the outer wall of the support core;

[0007] An insulating layer is extruded onto the outer wall of the sector-shaped stranded conductor;

[0008] A water-blocking layer is wrapped around the outer wall of the insulating layer;

[0009] The outer sheath is extruded onto the outer wall of the water-blocking layer;

[0010] The fan-shaped stranded conductor includes a multi-layer stranded structure, each layer of the stranded structure includes multiple fan-shaped cross-section monofilaments, the support core has a cavity for accommodating water-blocking paste, and the support core has micropores extending from the surface of the support core to the cavity.

[0011] Preferably, the support core comprises a silicone rubber hollow tube, and the silicone rubber hollow tube has a cavity inside.

[0012] Preferably, the micropores are arranged radially on the outer wall of the support core.

[0013] Preferably, the outer wall of the support core is provided with an aluminum alloy braided structure, and the diameter of the aluminum alloy wire is 0.3 to 0.5 mm.

[0014] Preferably, the fan-shaped cross-section of the monofilament comprises an aluminum alloy monofilament or a tin-plated copper monofilament.

[0015] Preferably, the sector-shaped stranded conductor includes an inner stranded structure, a middle stranded structure, and an outer stranded structure, with each stranded structure having the same thickness.

[0016] Preferably, the width of the monofilament in the inner stranded structure is greater than the width of the monofilament in the middle stranded structure, and the width of the monofilament in the middle stranded structure is greater than the width of the monofilament in the outer stranded structure.

[0017] Preferably, the insulating layer comprises a foamed polyethylene insulating layer.

[0018] Preferably, the water-blocking layer comprises a polyurethane foam extrusion layer.

[0019] Preferably, the outer sheath comprises a polyvinyl chloride sheath.

[0020] Compared with the prior art, the advantages of this utility model are:

[0021] The photovoltaic cable conductor proposed in this utility model adopts a fan-shaped stranded conductor, which can improve the fill factor and conductivity. The fan-shaped stranded conductor has an elastic support core in the middle. With the setting of the elastic core, the conductor can squeeze the support core to deform it when the cable is bent, so as to reduce the stress between the conductor wires. Especially at low temperature, it can provide better protection for the wires. The insulation layer of the cable adopts a foamed polyethylene insulation layer, which can maintain its physical properties at low temperature and is suitable for water surface photovoltaic cables in cold regions. Attached Figure Description

[0022] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in the various figures may be denoted by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings, wherein:

[0023] Figure 1 This is a schematic diagram of the cross-sectional structure of the corrosion-resistant, high-conductivity solar photovoltaic special cable shown in this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the corrosion-resistant, high-conductivity solar photovoltaic special cable shown in this utility model. Detailed Implementation

[0025] To better understand the technical content of this utility model, specific embodiments are provided below in conjunction with the accompanying drawings.

[0026] Combination Figure 1 and Figure 2 As shown, this utility model proposes a corrosion-resistant, high-conductivity solar photovoltaic special cable, including a support core 1, a fan-shaped stranded conductor 3, an insulation layer 4, a water-blocking layer 5, and an outer sheath 6.

[0027] The support core 1 is an elastic strip structure with a cross-section of annular, and the fan-shaped stranded conductor 3 is stranded on the outer wall of the support core 1.

[0028] Among them, the sector-shaped stranded conductor 3 includes a multi-layer stranded structure, and each layer of the stranded structure includes multiple single wires with sector-shaped cross sections.

[0029] In this way, the conductor formed by twisting the single wires of the sector cross section can reduce the gap between conductors and increase the fill factor, thereby reducing resistance and improving conductivity. Meanwhile, the centrally placed support core 1 can provide a certain support during the twisting process, maintain the stability of the conductor structure, prevent the conductor from deforming or loosening, and thus ensure good electrical contact between the single wires of each sector cross section.

[0030] Optionally, the fan-shaped cross-section of the monofilament may include aluminum alloy monofilament or tin-plated copper monofilament.

[0031] In an optional embodiment, the sector-shaped stranded conductor 3 includes an inner stranded structure, a middle stranded structure, and an outer stranded structure, with each stranded structure having the same thickness.

[0032] Among them, the width of the monofilament in the inner layer twisted structure is greater than the width of the monofilament in the middle layer twisted structure, and the width of the monofilament in the middle layer twisted structure is greater than the width of the monofilament in the outer layer twisted structure.

[0033] Thus, because the outer layer of single filaments is narrow, the conductor has good bending performance and the outer layer is subjected to less stress when bending. At the same time, since the support core 1 is located in the inner layer of the conductor, when the cable is bent, the conductor can avoid high stress between the single filaments by squeezing the support core.

[0034] Furthermore, the support core 1 has an internal cavity 11 for accommodating water-blocking paste, and the support core 1 has micropores 12 extending from the surface of the support core 1 into the cavity 11. Optionally, the micropores 12 are radially arranged on the outer wall of the support core 1.

[0035] By filling the cavity 11 of the support core 1 with water-blocking paste, when the fan-shaped stranded conductor 3 is bent and the support core 1 is squeezed to deform it, the water-blocking paste inside the cavity 11 can penetrate into the single filaments of the fan-shaped cross section through micropores, which can prevent the intrusion of water and prevent water from corroding the conductor or increasing the resistance, thereby improving the corrosion resistance of the cable.

[0036] Preferably, the support core 1 comprises a hollow silicone rubber tube, the interior of which has a cavity 11. Silicone rubber is a high-performance elastic material that also has good electrical insulation properties and chemical stability, enabling it to maintain stable performance in harsh environments.

[0037] Furthermore, the outer wall of the support core 1 is provided with an aluminum alloy braided structure, and the diameter of the aluminum alloy wire is 0.3 to 0.5 mm.

[0038] By setting an aluminum alloy braided structure on the outer wall of the support core 1, the elasticity of the support core 1 can be increased, and the electric field on the surface of the support core 1 can be uniformly distributed to avoid uneven electric field distribution.

[0039] Furthermore, the insulation layer 4 is extruded onto the outer wall of the sector-shaped stranded conductor 3, the water-blocking layer 5 is covered onto the outer wall of the insulation layer 4, and the outer sheath 6 is extruded onto the outer wall of the water-blocking layer 5.

[0040] Preferably, the insulation layer 4 includes a foamed polyethylene insulation layer. Foamed polyethylene has good insulation properties and a low dielectric constant, which can effectively reduce power loss, improve the transmission efficiency of the cable, and further improve the bending performance of the cable to adapt to the bending and twisting conditions required when laying on the water surface.

[0041] At the same time, the lightweight properties of foamed polyethylene also make it more promising for use in floating photovoltaic cables. Because foamed polyethylene performs well in low-temperature environments, it is also suitable for floating photovoltaic cables in cold regions.

[0042] In an optional embodiment, the water-blocking layer 5 includes a polyurethane foam extrusion layer, which has the advantages of low density, light weight, and high strength, and can be used to improve the mechanical strength and weather resistance of the cable, especially its low-temperature weather resistance.

[0043] Preferably, the outer sheath 6 includes a polyvinyl chloride (PVC) sheath. The PVC sheath can maintain stable performance in a water environment for a long time, does not absorb water, does not deform, does not corrode, and can also resist the erosion of natural factors such as sunlight and ultraviolet rays, thus extending the service life of the cable.

[0044] In conjunction with the above embodiments, the photovoltaic cable conductor proposed in this utility model adopts a fan-shaped stranded conductor. The fan-shaped stranded conductor can improve the fill factor and conductivity. An elastic support core is provided in the middle of the fan-shaped stranded conductor. With the setting of the elastic core, the conductor can squeeze the support core to deform it when the cable is bent, so as to reduce the stress between the conductor wires. Especially at low temperatures, it can provide better protection for the wires. The insulation layer of the cable adopts a foamed polyethylene insulation layer, which can maintain its physical properties at low temperatures and is suitable for water surface photovoltaic cables in cold regions.

[0045] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A corrosion-resistant, high-conductivity solar photovoltaic special cable, characterized in that, include: Support core (1), wherein the support core (1) is an elastic strip structure with an annular cross-section; A sector-shaped stranded conductor (3) is stranded on the outer wall of the support core (1); An insulating layer (4) is extruded onto the outer wall of the sector-shaped stranded conductor (3); A water-blocking layer (5) covers the outer wall of the insulating layer (4); The outer sheath (6) is extruded onto the outer wall of the water-blocking layer (5); The fan-shaped stranded conductor (3) includes a multi-layer stranded structure, each layer of the stranded structure includes multiple fan-shaped cross-sections of single wires, the interior of the support core (1) is provided with a cavity (11) for accommodating water-blocking paste, and the support core (1) is provided with micropores (12) extending from the surface of the support core (1) to the cavity (11).

2. The corrosion-resistant, high-conductivity solar photovoltaic special cable according to claim 1, characterized in that, The support core (1) includes a silicone rubber hollow tube, and the inside of the silicone rubber hollow tube is provided with a cavity (11).

3. The corrosion-resistant, high-conductivity solar photovoltaic special cable according to claim 1, characterized in that, The micropores (12) are arranged radially on the outer wall of the support core (1).

4. The corrosion-resistant, high-conductivity solar photovoltaic special cable according to claim 1, characterized in that, The outer wall of the support core (1) is provided with an aluminum alloy braided structure, and the diameter of the aluminum alloy wire is 0.3 to 0.5 mm.

5. The corrosion-resistant, high-conductivity solar photovoltaic special cable according to claim 1, characterized in that, The fan-shaped cross-section of the monofilament includes aluminum alloy monofilament or tin-plated copper monofilament.

6. The corrosion-resistant, high-conductivity solar photovoltaic special cable according to claim 1, characterized in that, The sector-shaped stranded conductor (3) includes an inner stranded structure, a middle stranded structure and an outer stranded structure, with each stranded structure having the same thickness.

7. The corrosion-resistant, high-conductivity solar photovoltaic special cable according to claim 6, characterized in that, The width of the single filament in the inner stranded structure is greater than the width of the single filament in the middle stranded structure, and the width of the single filament in the middle stranded structure is greater than the width of the single filament in the outer stranded structure.

8. The corrosion-resistant, high-conductivity solar photovoltaic special cable according to claim 1, characterized in that, The insulation layer (4) includes a foamed polyethylene insulation layer.

9. The corrosion-resistant, high-conductivity solar photovoltaic special cable according to claim 1, characterized in that, The water-blocking layer (5) includes a polyurethane foam extrusion layer.

10. The corrosion-resistant, high-conductivity solar photovoltaic special cable according to claim 1, characterized in that, The outer sheath (6) includes a polyvinyl chloride sheath.

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