Stretch-resistant aluminum alloy photovoltaic cable

Abstract

The utility model discloses a tensile aluminum alloy photovoltaic cable which comprises a cable core, the cable core is composed of two conductive units, a waterproof layer is arranged outside the cable core, a gap between the two conductive units in the waterproof layer is filled with a filling layer, a fireproof layer is wrapped outside the waterproof layer, and the fireproof layer is wrapped outside the waterproof layer. The fireproof layer is coated with an armor layer, and the armor layer is coated with an outer protective layer. With the adoption of the photovoltaic cable, the tensile property of the cable is synchronously increased on the premise of ensuring that the conductive performance is met, so that the use requirements under complex working environment conditions are met, the manufacturing cost can be reduced, the weight of the cable is reduced, and the photovoltaic cable is high in practicability, reasonable in design and worthy of popularization and use.

Description

Technical Field

[0001] This utility model relates to the field of power cable technology, specifically a tensile-resistant aluminum alloy photovoltaic cable. Background Technology

[0002] As a crucial supporting industry for the national economy, the power cable industry has seen increasingly widespread applications due to the rapid development of the national economy. The rapid development of the clean energy photovoltaic power generation industry has spurred continuous improvement in photovoltaic power generation technology. Photovoltaic power generation, based on the photovoltaic effect, directly converts solar energy into electrical energy using solar cells, offering advantages such as safety, reliability, noiselessness, and zero pollution. In new energy photovoltaic power generation systems, a large number of cables are required for power transmission and connections between equipment.

[0003] Due to the special environment in which photovoltaic cables are used, they are required to possess properties such as UV resistance, oil resistance, heat aging resistance, rodent and termite resistance, flame retardancy, and environmental friendliness. Existing photovoltaic cables are generally single-core structures, with conductors typically made of tin-plated soft copper, while the insulation and sheath layers are generally extruded from low-smoke halogen-free polyolefin polymer materials. Using existing photovoltaic cables presents two main problems: first, the tin-plating process for tin-plated copper conductors is complex, poses a risk of environmental pollution, and lacks tensile and compressive strength; second, the high cost of copper increases both processing and operating costs for manufacturers and users, leading to a growing demand for alternative conductor materials. Among metallic materials, aluminum offers advantages such as good conductivity, light weight, and low price; furthermore, increased environmental awareness in recent years necessitates weight reduction to improve fuel efficiency in machinery. Therefore, replacing copper-core cables with aluminum-core cables is an inevitable trend. However, ordinary aluminum core cables have poor mechanical properties and corrosion resistance, and cannot meet the high conductivity and mechanical strength requirements of photovoltaic cables under harsh environmental conditions.

[0004] A search revealed two patent documents: CN221596015U, which discloses a flexible aluminum alloy photovoltaic cable, and CN217485122U, which discloses a high-temperature resistant, high-conductivity aluminum alloy conductor parallel photovoltaic cable. These two patent documents offer photovoltaic cables that meet specific usage requirements from different perspectives. With the rapid development of the photovoltaic power generation industry, a large number of cables are needed. To enhance corporate competitiveness, adapt to market demands, and increase market share, this patent seeks to provide a power cable that differs from existing technologies to meet these requirements. Utility Model Content

[0005] The technical problem to be solved by this utility model is to address the problems existing in the background technology, thereby providing a photovoltaic cable with a simple structure and stable performance. Using this photovoltaic cable, it is possible not only to effectively avoid the situation where the cable is prone to breakage and damage during the laying process due to insufficient structural strength, lack of tensile strength and toughness, but also to reduce manufacturing costs and reduce cable weight, so as to meet the requirements for use under complex and harsh working environment conditions. Specifically, it is a tensile-resistant aluminum alloy photovoltaic cable.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a tensile-resistant aluminum alloy photovoltaic cable, including a cable core, the cable core being composed of two conductive units, a waterproof layer being provided outside the cable core, a filler layer being filled in the gap between the two conductive units inside the waterproof layer, a fire-resistant layer being wrapped around the waterproof layer, an armor layer being covered outside the fire-resistant layer, and an outer sheath being covered outside the armor layer.

[0007] Furthermore, in the tensile-resistant aluminum alloy photovoltaic cable of this utility model, the conductive unit includes a conductor, and an insulating layer is wrapped around the soft conductor. The conductor is made of Class 5 aluminum alloy conductors as specified in GB / T 3956-2008, and the insulating layer is extruded from photovoltaic irradiated low-smoke halogen-free polyolefin material at 125℃. Two conductive units are twisted into a cable, with the twisting direction being right-handed, and the twisting pitch not exceeding 40 times the outer diameter of the cable.

[0008] Furthermore, in the tensile-resistant aluminum alloy photovoltaic cable of this utility model, the filling layer is made of aramid fiber.

[0009] Furthermore, in the tensile-resistant aluminum alloy photovoltaic cable of this utility model, the waterproof layer is formed by double-layer overlapping wrapping of water-blocking tape, and the water-blocking tape is a water-swellable composite longitudinally wrapped water-blocking tape.

[0010] Furthermore, in the tensile-resistant aluminum alloy photovoltaic cable of this utility model, the fire-resistant layer is made of fire-resistant glass fiber tape wrapped around it.

[0011] Furthermore, in the tensile-resistant aluminum alloy photovoltaic cable of this utility model, the armor layer is made of two layers of galvanized steel strip spirally wrapped.

[0012] Furthermore, in the tensile-resistant aluminum alloy photovoltaic cable of this utility model, the outer sheath is extruded from photovoltaic irradiated low-smoke halogen-free polyolefin material at 125℃.

[0013] The tensile-resistant aluminum alloy photovoltaic cable described in this utility model features a conductor made of Class 5 aluminum alloy, which exhibits excellent conductor stability, conductivity, wear resistance, corrosion resistance, and electromagnetic shielding. Furthermore, a waterproof layer, a fire-resistant layer, an armor layer, and an outer sheath are sequentially arranged outside the cable core, while a filler layer is placed inside the core. This structure effectively avoids problems such as insufficient structural strength, lack of tensile strength, and poor toughness, preventing breakage during installation. It also reduces manufacturing costs and cable weight, thus meeting the requirements for use in complex and harsh working environments.

[0014] Therefore, the photovoltaic cable described in this utility model not only ensures conductivity but also increases the cable's tensile strength, thus meeting the requirements for use under complex working environments. It also reduces manufacturing costs and cable weight, making it highly practical, reasonably designed, and worthy of widespread use. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] As shown in the figure: 1-Conductor, 2-Insulation layer, 3-Filling layer, 4-Waterproof layer, 5-Fire-resistant layer, 6-Armor layer, 7-Outer protective layer. Detailed Implementation

[0018] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0019] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," and "right" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "provided with" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] It should be noted that the term "comprising" or any other variation is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0022] like Figure 1 As shown, this embodiment provides a tensile-resistant aluminum alloy photovoltaic cable, including a cable core, which is composed of two conductive units. A waterproof layer 4 is provided outside the cable core. A filler layer 3 is filled in the gap between the two conductive units inside the waterproof layer 4. A fire-resistant layer 5 is wrapped around the waterproof layer 4. An armor layer 6 is covered outside the fire-resistant layer 5. An outer sheath 7 is covered outside the armor layer 6.

[0023] In the specific manufacturing process, the photovoltaic cable provided in this embodiment is used. The conductive unit includes a conductor 1, and an insulation layer 2 is wrapped around the soft conductor 1. The conductor 1 is made of aluminum alloy conductor of type 5 in GB / T 3956-2008, which is hinged together. The insulation layer 2 is made of photovoltaic irradiated low-smoke halogen-free polyolefin material extruded at 125℃. The two conductive units are twisted into a cable, and the twisting direction is right-handed, and the twisting pitch is not greater than 40 times the outer diameter of the cable. The filling layer 3 is made of aramid fiber. The waterproof layer 4 is made of double-layer overlapping water-blocking tape, which is a water-swellable composite longitudinally wrapped water-blocking tape. The fire-resistant layer 5 is made of fire-resistant glass fiber tape. The armor layer 6 is made of two layers of galvanized steel strip spirally wrapped. The outer sheath 7 is made of photovoltaic irradiated low-smoke halogen-free polyolefin material extruded at 125℃.

[0024] The tensile-resistant aluminum alloy photovoltaic cable of this utility model uses conductor 1, which is made of Class 5 aluminum alloy conductors according to GB / T 3956-2008. Class 5 aluminum alloy conductors are modified electrical materials formed by adding rare earth, magnesium, copper and iron elements to pure aluminum and through conventional alloying processes. They have good stability, conductivity, wear resistance, corrosion resistance and electromagnetic shielding, and have good application prospects. Using them as the conductor of the photovoltaic cable of this utility model can meet the usage requirements.

[0025] Both the insulation layer 2 and the outer sheath 7 are extruded from 125℃ photovoltaic irradiated low-smoke halogen-free polyolefin material. This photovoltaic irradiated low-smoke halogen-free polyolefin material is a specialized insulation and sheathing material for photovoltaic cables. Its composition includes polyethylene (PE), polyvinyl chloride resin (PVC), chlorosulfonated polyethylene rubber (CSM), ethylene-acrylate copolymer, and chlorohydrin rubber (T3100). Its performance characteristics include weather resistance, cold resistance, high temperature resistance, abrasion resistance, UV resistance, and ozone resistance, as well as low smoke and halogen-free properties. In the event of a fire, it exhibits slow flame spread, low smoke concentration, high visibility, and low release of harmful gases. Therefore, the 125℃ photovoltaic irradiated low-smoke halogen-free polyolefin material not only possesses excellent mechanical and physical properties, electrical properties, flame retardant properties, and processing performance, but also has advantages such as being halogen-free and having low smoke emission. Since this material is a conventional technical solution in the existing cable industry, it is not described in detail.

[0026] The filler layer 3 is made of aramid fiber, a new type of high-tech synthetic fiber. Aramid has a relative density of 1.33 to 1.36, is insoluble in water, methanol (ethanol), acetone, gasoline, etc., but soluble in concentrated sulfuric acid. It has excellent properties such as ultra-high strength, high modulus, high temperature resistance, acid and alkali resistance, light weight, insulation, aging resistance, and long service life. Using aramid as a filler material can enhance the overall tensile strength of the cable and effectively prevent the product performance from being affected by excessive bending during use.

[0027] The waterproof layer 4 is made of double-layer overlapping water-blocking tape. The water-blocking tape is a water-swellable composite longitudinally wrapped water-blocking tape, which can enhance its waterproof performance while meeting the insulation performance requirements, making it suitable for use in damp underground environments.

[0028] The fire-resistant layer 5 is made of fire-resistant glass fiber tape. The glass fiber tape is made of high-temperature resistant and high-strength glass fiber and is processed by special technology. It has the characteristics of high temperature resistance, heat insulation, insulation, fire resistance, corrosion resistance, aging resistance, weather resistance, high strength and smooth appearance. Using glass fiber tape as the fire-resistant layer 5 can enhance the fire resistance of the cable.

[0029] The armor layer 6 is made of two layers of galvanized steel strip spirally wrapped. The galvanized steel strip wrapping allows the cable to have a certain water resistance while protecting the internal structure from damage by external mechanical forces. When the cable may be damaged by external forces or needs to withstand the weight of a large span, it can effectively improve the tensile strength of the cable.

[0030] Therefore, the photovoltaic cable described in this utility model, with its conductor made of Class 5 aluminum alloy hinged together, exhibits good conductor stability, conductivity, wear resistance, corrosion resistance, and electromagnetic shielding. Furthermore, a waterproof layer 4, a fire-resistant layer 5, an armor layer 6, and an outer sheath 7 are sequentially arranged outside the cable core, and a filler layer 3 is filled inside the cable core. By adopting the above structure, not only can the problems of insufficient structural strength, lack of tensile strength, and toughness be effectively avoided, thus preventing breakage and damage during laying, but manufacturing costs are also reduced, and cable weight is lightened, thereby meeting the requirements for use in complex and harsh working environments.

[0031] In summary, the photovoltaic cable described in this utility model not only ensures conductivity but also increases the cable's tensile strength, thereby meeting the requirements for use under complex working environments. It also reduces manufacturing costs and cable weight, making it highly practical, rationally designed, and worthy of widespread adoption.

[0032] Other aspects of this utility model that are not detailed herein are all conventional techniques known to those skilled in the art.

[0033] The scope of protection of this utility model is not limited to the technical solutions disclosed in the specific embodiments. The above description is only a preferred embodiment of this utility model and does not limit this utility model. Any minor modifications, equivalent substitutions and improvements made based on the technical solutions of this utility model should be included within the scope of protection of the technical solutions of this utility model.

Claims

1. A tensile-resistant aluminum alloy photovoltaic cable, comprising a cable core, characterized in that: The cable core is composed of two conductive units. A waterproof layer (4) is provided outside the cable core. A filling layer (3) is filled in the gap between the two conductive units inside the waterproof layer (4). A fire-resistant layer (5) is wrapped around the waterproof layer (4). An armor layer (6) is covered outside the fire-resistant layer (5). An outer protective layer (7) is covered outside the armor layer (6). The conductive unit includes a conductor (1) and an insulating layer (2) covering the conductor (1). The conductor (1) is made of aluminum alloy conductor of type 5 in GB / T 3956-2008 and is hinged together. The insulating layer (2) is made of photovoltaic irradiated low smoke halogen-free polyolefin material extruded at 125℃. The two conductive units are twisted into a cable with the twisting direction being right-handed and the twisting pitch not exceeding 40 times the outer diameter of the cable. The filling layer (3) is made of aramid fiber; The waterproof layer (4) is formed by double-layer overlapping of water-blocking tape, and the water-blocking tape is a water-swellable composite longitudinally wrapped water-blocking tape. The refractory layer (5) is made of refractory glass fiber tape wrapped around it; The armor layer (6) is made of two layers of galvanized steel strip spirally wrapped together; The outer protective layer (7) is extruded from a photovoltaic irradiated low-smoke halogen-free polyolefin material at 125℃.

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