CN220121503U - A water-resistant aluminum alloy core photovoltaic cable - Google Patents

Abstract

The utility model provides a waterproof aluminum alloy core photovoltaic cable, which belongs to the technical field of cables for photovoltaic power generation systems and comprises a conductor, wherein the conductor is stranded wires formed by stranding 5 th class aluminum alloy single wire bundles, the outer wall of the conductor is sequentially coated with an insulating layer, a waterproof layer and an outer protective layer, and is extruded by adopting 1+2 series three-layer coextrusion.

Description

Waterproof type aluminum alloy core photovoltaic cable

Technical Field

The utility model mainly relates to the technical field of cables for photovoltaic power generation systems, in particular to a waterproof aluminum alloy core photovoltaic cable.

Background

The photovoltaic power generation system directly converts solar energy into electric energy by utilizing a solar battery, and the main components of the photovoltaic power generation system are a cable, the solar battery, a storage battery, a controller and an inverter.

With the increase of global energy use, non-renewable energy sources such as fossil fuel and the like are gradually exhausted, new energy development and utilization become the focus of world nations, solar energy is used as a resource, the solar energy has the advantages of inexhaustible use, the accelerated deployment of Chinese photovoltaic is started from 2020 to 2025, 2025 to 2035 is started, the large-scale accelerated deployment period of Chinese photovoltaic is started, 2025 and 2035 are started, the size of a Chinese photovoltaic power generation assembly machine reaches 3000 gigawatts respectively, the data reaches 5000 watts to 2050, the photovoltaic becomes the first large power supply of China and accounts for about 40% of the national power consumption in the current year.

At present, a copper conductor is generally adopted as a main mode for transmitting electric energy by a cable for a solar power generation system, the price is high, materials are short, meanwhile, the cable in the solar power generation system is exposed to sunlight for a long time or soaked in water for a long time, and various factors such as abrupt change of the ambient temperature exist, particularly in photovoltaic power generation construction projects at home and abroad in recent years, the problem that the photovoltaic cable is replaced in a large area due to the steep reduction of the insulation resistance of the photovoltaic cable caused by buried laying, soaking and wetting frequently occurs, so that the problem of environmental safety, service life and price of the cable is extremely concerned by users.

Disclosure of Invention

The technical scheme of the utility model aims at the technical problem that the prior art is too single, provides a solution which is obviously different from the prior art, and particularly mainly provides a waterproof aluminum alloy core photovoltaic cable, which is used for solving the technical problem that in the photovoltaic power generation construction projects at home and abroad in recent years, the photovoltaic cable insulation resistance is rapidly reduced due to buried laying, soaking and wetting, so that the photovoltaic cable is replaced in a large area, and the service life is short.

The technical scheme adopted for solving the technical problems is as follows:

the utility model provides a water-resistant type aluminum alloy core photovoltaic cable, includes the conductor, the conductor is by the strand wire that 5 class aluminum alloy single wire harness silk transposition formed, and the aluminum alloy line of conductor accords with GB/T30552's soft aluminum line LR state, the conductor outer wall cladding has insulating layer, water-resistant layer and outer sheath in proper order, just insulating layer, water-resistant layer and outer sheath adopt 1+2 tandem type three-layer coextrusion shaping to extrude.

Further, the conductor is formed by stranding 5 th annealed round soft aluminum alloy monofilament bundles, and the diameter of the annealed round soft aluminum alloy monofilament of the conductor is between 0.41 and 0.61 mm.

Further, the insulating layer is a 125 ℃ irradiation crosslinking low smoke halogen-free polyolefin insulating material with 10% -30% of thermal extension.

Further, the water-resistant layer is a water-resistant type 125 ℃ irradiation crosslinking low-smoke halogen-free polyolefin insulating material.

Further, the outer protective layer is a 125 ℃ irradiation crosslinking low smoke halogen-free polyolefin material with the thermal extension of 20-40%.

Further, three layers of the insulating layer, the water-resistant layer and the outer protective layer are co-extruded into a disposable extrusion.

Further, the ratio of the thickness of the water-resistant layer to the thickness of the outer protective layer is 1:3.

Furthermore, the insulating layer, the water-resistant layer and the outer protective layer are crosslinked by one-time irradiation.

Compared with the prior art, the utility model has the beneficial effects that:

(1) The utility model adopts the soft aluminum alloy wire bundle stranding manufacturing process design to replace copper with aluminum, reduces the manufacturing cost by about 40%, reduces the cost of the whole photovoltaic cost, has important significance for photovoltaic power generation construction in a new period, and has extremely high application value.

(2) According to the utility model, by adopting a three-layer co-extrusion water-resistant integrated structural design, the long-term water resistance and the long-term service life of the solar photovoltaic cable are improved, the long-term high insulation performance of the cable in the use process is ensured, the characteristics of high and low temperature resistance, acid and alkali resistance, weather resistance, low smoke, zero halogen, environmental protection and the like are ensured, and meanwhile, the tight cladding and high concentricity of an insulating layer, a waterproof layer and a sheath layer are easier to realize by three-layer co-extrusion.

The utility model will be explained in detail below with reference to the drawings and specific embodiments.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

fig. 2 is a schematic cross-sectional view of the present utility model.

In the figure: 1. a conductor; 2. an insulating layer; 3. a water-resistant layer; 4. and an outer protective layer.

Detailed Description

In order that the utility model may be more fully understood, a more particular description of the utility model will be rendered by reference to the appended drawings, in which several embodiments of the utility model are illustrated, but which may be embodied in different forms and are not limited to the embodiments described herein, which are, on the contrary, provided to provide a more thorough and complete disclosure of the utility model.

It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to the other element, it may be directly connected to the other element or intervening elements may also be present, the terms "vertical", "horizontal", "left", "right" and the like are used herein for the purpose of illustration only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly connected to one of ordinary skill in the art to which this utility model belongs, and the knowledge of terms used in the description of this utility model herein for the purpose of describing particular embodiments is not intended to limit the utility model, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-2, a waterproof aluminum alloy core photovoltaic cable comprises a conductor 1, wherein the conductor 1 is a stranded wire formed by stranding 5 th type aluminum alloy single wire bundles, the aluminum alloy wire of the conductor 1 accords with the soft aluminum wire LR state of GB/T30552, an insulating layer 2, a waterproof layer 3 and an outer protective layer 4 are sequentially coated on the outer wall of the conductor 1, and the insulating layer 2, the waterproof layer 3 and the outer protective layer 4 are extruded by adopting 1+2 series three-layer coextrusion.

Through the structure, the soft aluminum alloy wire bundle twisting manufacturing process design is adopted, aluminum is adopted to replace copper, the manufacturing cost is reduced by about 40%, the three-layer co-extrusion water-resistant integrated structural design is adopted, the long-term water resistance and long-term service life of the solar photovoltaic cable are improved, the long-term high insulation performance of the cable in the use process is ensured, the characteristics of high and low temperature resistance, acid and alkali resistance, weather resistance, low smoke zero halogen environmental protection and the like are ensured, meanwhile, the three-layer co-extrusion is easier to realize the tight coating and high concentricity of the insulating layer 2, the water-resistant layer 3 and the outer protective layer 4, the cost of the whole photovoltaic cable industry is reduced, the solar photovoltaic cable has important significance on the photovoltaic power generation construction in a new period, and the application value is extremely high;

referring to fig. 2, the conductor 1 is a 5 th annealed soft aluminum alloy monofilament bundle stranded, the diameter of the annealed soft aluminum alloy monofilament of the conductor 1 is between 0.41 and 0.61mm, the tensile strength of the annealed soft aluminum alloy monofilament bundle is 100 to 159N/mm2, the elongation at break is not less than 10%, the number of repeated bending times is not less than 25, the insulating layer 2 is a 125 ℃ radiation crosslinking low smoke halogen-free polyolefin insulating material with 10 to 30% of thermal extension, the water-resistant layer 3 is a 125 ℃ radiation crosslinking low smoke halogen-free polyolefin insulating material with excellent water resistance and electrical insulation performance, the cable is prevented from being immersed into the insulating layer 2 in a long-term humid environment, the outer protective layer 4 is a 125 ℃ radiation crosslinking low smoke halogen-free polyolefin material with 20 to 40% of thermal extension, three layers of the insulating layer 2, the water-resistant layer 3 and the outer protective layer 4 are extruded at one time, the thickness ratio of the water-resistant layer 3 to the outer protective layer 4 is 1:3, and the insulating layer 2, the water-resistant layer 3 and the outer protective layer 4 are crosslinked once.

Through adopting three-layer coextrusion structural design, inlayer volume resistivity is big, and insulation resistance is more than 1000 times than traditional polyvinyl chloride insulated wire's resistance under the highest operating temperature of the electric wire of same sectional area, and receives outside moisture's influence very little, and electric properties is stable, and outer sheath is fire-retardant material, can satisfy single flame retardant property's requirement, and can effectively protect inlayer 2 to avoid the influence of mechanical external force, improves the security of electric wire itself.

While the utility model has been described above with reference to the accompanying drawings, it will be apparent that the utility model is not limited to the embodiments described above, but is intended to be within the scope of the utility model, as long as such insubstantial modifications are made by the method concepts and technical solutions of the utility model, or the concepts and technical solutions of the utility model are applied directly to other occasions without any modifications.

Claims (8)

1. The utility model provides a water-resistant type aluminum alloy core photovoltaic cable, includes conductor (1), its characterized in that, conductor (1) is by the strand wire that 5 th class aluminum alloy single wire harness silk transposition formed, and the aluminum alloy line of conductor (1) accords with GB/T30552's soft aluminum line LR state, conductor (1) outer wall cladding has insulating layer (2), water-resistant layer (3) and outer sheath (4) in proper order, just insulating layer (2), water-resistant layer (3) and outer sheath (4) adopt 1+2 series-type three-layer to coextrude the shaping to extrude.

2. The water-resistant aluminum alloy core photovoltaic cable according to claim 1, characterized in that the conductor (1) is stranded by 5 th annealed round soft aluminum alloy monofilament bundles, and the diameter of the annealed round soft aluminum alloy monofilament of the conductor (1) is between 0.41 and 0.61 mm.

3. The water-resistant aluminum alloy core photovoltaic cable according to claim 1, characterized in that the insulating layer (2) is a 125 ℃ irradiation cross-linked low smoke halogen-free polyolefin insulating material with a thermal extension of 10% -30%.

4. The water-resistant aluminum alloy core photovoltaic cable according to claim 1, characterized in that the water-resistant layer (3) is a water-resistant 125 ℃ irradiation crosslinking low smoke halogen-free polyolefin insulating material.

5. The water-resistant aluminum alloy core photovoltaic cable according to claim 1, characterized in that the outer sheath (4) is a 125 ℃ irradiation cross-linked low smoke halogen-free polyolefin material with a thermal extension of 20% -40%.

6. A water resistant aluminium alloy core photovoltaic cable according to claim 3, characterized in that the three layers of the insulating layer (2), the water resistant layer (3) and the outer sheath (4) are co-extruded as a disposable extrusion.

7. The water-resistant aluminum alloy core photovoltaic cable according to claim 6, characterized in that the thickness ratio of the water-resistant layer (3) to the outer protective layer (4) is 1:3.

8. The waterproof aluminum alloy core photovoltaic cable according to claim 6, wherein the insulating layer (2), the waterproof layer (3) and the outer protective layer (4) are crosslinked by one-time irradiation.