Water-blocking, rat-proof and ant-proof photovoltaic cable

Abstract

The utility model relates to the technical field of cables, and discloses a water-blocking, rat-proof and ant-proof photovoltaic cable, which comprises a conductor, a conductor water-blocking layer is sleeved outside the conductor, an insulating layer is sleeved outside the conductor water-blocking layer, an insulating water-blocking layer is sleeved outside the insulating layer, and a rat-proof and ant-proof layer is sleeved outside the insulating water-blocking layer. According to the waterproof rat-proof and ant-proof photovoltaic cable, safe and stable operation of a photovoltaic system is guaranteed, substances harmful to the environment and human bodies are not generated in the production process, and when the waterproof rat-proof and ant-proof photovoltaic cable is laid outdoors, the waterproof rat-proof and ant-proof photovoltaic cable is not prone to moisture absorption and is not prone to being bitten by rats and ants.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, and in particular to a water-blocking, rat-proof and ant-proof photovoltaic cable. Background Art

[0002] Traditional photovoltaic power generation systems usually use photovoltaic cables with the structure of "tinned copper conductor + halogen-free low-smoke flame-retardant cross-linked polyolefin insulation + halogen-free low-smoke flame-retardant cross-linked polyolefin sheath". However, during the design and manufacturing process of such traditional photovoltaic cables, the complex and changeable environment of outdoor laying and use of photovoltaic cables is not fully considered.

[0003] Traditional photovoltaic cable products have poor water-blocking properties and are not rat-proof and ant-proof, which easily causes the insulation to absorb moisture, resulting in reduced insulation resistance or damage to the insulation by rats and ants, ultimately leading to insulation breakdown. Utility Model Content

[0004] To solve the above problems, the utility model provides a water-blocking, rat- and ant-proof photovoltaic cable, comprising a conductor, wherein the conductor is sheathed with a conductor water-blocking layer, the conductor water-blocking layer is sheathed with an insulating layer, the insulating layer is sheathed with an insulating water-blocking layer, and the insulating water-blocking layer is sheathed with a rat- and ant-proof layer.

[0005] Optionally, the conductor is a flexible aluminum alloy soft conductor.

[0006] Optionally, the conductor water-blocking layer is an insulating double-sided water-blocking tape.

[0007] Optionally, the insulating layer is made of 120° C. irradiation cross-linked halogen-free, low-smoke, flame-retardant polyolefin insulation material specially used for photovoltaic cables.

[0008] Optionally, the insulating water-blocking layer is an insulating double-sided water-blocking tape.

[0009] Optionally, the rat and ant-proof layer includes a nylon sheath layer and an outer sheath layer.

[0010] Optionally, the nylon sheath layer is made of polyamide 12.

[0011] Optionally, the thickness of the nylon sheath layer at its thinnest point is not less than 0.5 mm.

[0012] Optionally, a rat- and ant-proof chemical additive is added to the nylon sheath layer.

[0013] Optionally, the outer sheath layer is made of 120°C irradiation cross-linked halogen-free, low-smoke, flame-retardant polyolefin sheath material specially used for photovoltaic cables.

[0014] Compared with the prior art, the water-blocking, rat- and ant-proof photovoltaic cable in the utility model not only ensures the safe and stable operation of the photovoltaic system, but also does not produce any substances harmful to the environment and human body during the production process. When laid outdoors, it is not easy to absorb moisture and is difficult to be bitten by rats and ants. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a cross-sectional view of the water-blocking, rat-proof and ant-proof photovoltaic cable according to an embodiment of the utility model.

[0016] Description of reference numerals:

[0017] 1. Conductor; 2. Conductor water-blocking layer; 3. Insulation layer; 4. Insulation water-blocking layer; 5. Nylon sheath layer; 6. Outer sheath layer. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0019] In the description of the present invention, it should be understood that the terms "upper" and "lower" and the like indicate positions or location relationships that are based on the positions or location relationships when the product is in normal use.

[0020] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0021] The utility model embodiment provides a water-blocking, rat-proof and ant-proof photovoltaic cable. Figure 1 As shown, it includes a conductor 1, the conductor 1 is covered with a conductor water-blocking layer 2, the conductor water-blocking layer 2 is covered with an insulating layer 3, the insulating layer 3 is covered with an insulating water-blocking layer 4, and the insulating water-blocking layer 4 is covered with a rat-proof and ant-proof layer.

[0022] The conductor 1 is a flexible aluminum alloy soft conductor. Existing photovoltaic cable conductors generally use Class 5 tinned copper conductors. Wastewater, waste gas and waste residue will be generated during the plating process of the copper single wire, which will cause certain harm to the ecological environment and human health. The conductor 1 in the present application is a flexible aluminum alloy soft conductor. While the conductor 1 does not affect the safe and stable operation of the photovoltaic system, it does not produce waste soil, wastewater, and waste residue during the production process, which is better for the ecological environment and human health. The flexible aluminum alloy soft conductor ensures the flexibility of the cable structure and is easy to bend. It also allows the conductor 1 single wire to be free of the need for metal coating, making the conductor 1 lighter.

[0023] The conductor water-blocking layer 2 adopts an insulating double-sided water-blocking tape. Most photovoltaic cables are laid outdoors, and the existing photovoltaic cables have poor water-blocking performance, which easily causes the insulation to absorb moisture and reduce the insulation resistance. The conductor water-blocking layer 2 can provide water-blocking protection for the conductor 1. The water-absorbing material in the insulating double-sided water-blocking tape will expand rapidly when it encounters water, and the expanded volume will fill the gap between the conductor 1 and the insulating layer 3, thereby preventing water from further intrusion and longitudinal and radial diffusion.

[0024] The insulating layer 3 uses 120°C irradiation cross-linked halogen-free low-smoke flame-retardant polyolefin insulation material specially used for photovoltaic cables. The 120°C irradiation cross-linked halogen-free low-smoke flame-retardant polyolefin sheath material specially used for photovoltaic cables has better heat resistance, acid and alkali resistance, ozone resistance, moisture and heat resistance, weather resistance and insulation resistance than the 90°C irradiation cross-linked halogen-free low-smoke flame-retardant polyolefin sheath material used for photovoltaic cables. This material has excellent flame retardant properties and anti-ultraviolet aging properties, can withstand harsh climates and mechanical shocks, can significantly improve the heat resistance and heat conduction capacity of the cable, reduce the impact of high temperature, improve the safety and service life of the cable, and have a good protective effect on the cable.

[0025] The insulating water-blocking layer 4 adopts an insulating double-sided water-blocking tape. Most photovoltaic cables are laid outdoors, and the existing photovoltaic cables have poor water-blocking performance, which easily causes the insulation to absorb moisture and cause the insulation resistance to decrease. The conductor water-blocking layer 2 can provide water-blocking protection for the insulating layer 3. The water-absorbing material in the insulating double-sided water-blocking tape will expand rapidly after encountering water, and the expanded volume will fill the gap between the insulating layer 3 and the nylon sheath layer 5, thereby preventing water from further intrusion and longitudinal and radial diffusion. The conductor water-blocking layer 2 and the insulating water-blocking layer 4 have a dual water-blocking effect, making the waterproof effect of the entire cable better.

[0026] The rat and ant-proof layer comprises a nylon sheath layer 5 and an outer sheath layer 6 .

[0027] The nylon sheath layer 5 is made of polyamide 12. Most photovoltaic cables are laid outdoors, and existing photovoltaic cables do not have anti-rat and ant properties, which can easily cause the optical cable to be damaged by rats and ants. The use of polyamide 12 material can protect the cable from rats and ants. The nylon sheath layer 5 is made of polyamide 12 that meets the RoHS environmental protection requirements. This material has excellent mechanical properties, and its hardness and toughness make it impossible for rats and ants to bite through, thereby preventing damage to the inside of the optical cable.

[0028] The thickness of the thinnest point of the nylon sheath layer 5 is not less than 0.5 mm. A rat- and ant-proof chemical additive is added to the nylon sheath layer 5. Relatively speaking, adding a certain amount of chemical additive to the nylon sheath layer 5 can achieve the rat- and ant-proof effect, and this chemical additive is an environmentally friendly additive that does not pollute the ecological environment.

[0029] The outer sheath layer 6 adopts 120℃ irradiation cross-linked halogen-free low-smoke flame-retardant polyolefin sheath material specially used for photovoltaic cables. The outer sheath layer 6 adopts 120℃ irradiation cross-linked halogen-free low-smoke flame-retardant polyolefin sheath material specially used for photovoltaic cables. Compared with the 90℃ irradiation cross-linked halogen-free low-smoke flame-retardant polyolefin sheath material used for photovoltaic cables, it has better heat resistance, acid and alkali resistance, ozone resistance, moisture and heat resistance, weather resistance and insulation resistance. This material has excellent flame retardant properties and anti-ultraviolet aging properties, can withstand harsh climates and mechanical shocks, can significantly improve the heat resistance and heat conduction capacity of the cable, reduce the impact of high temperature, improve the safety and service life of the cable, and protect the cable.

[0030] This embodiment meets the requirements of T / CAS 566-2022 standard and has water-blocking and rat-proof functions. The specific test results are as follows:

[0031] 1. The thermal elongation test temperature of the insulating layer 3 and the outer sheath layer 6 is (250±3)°C, at which the maximum elongation and the maximum permanent elongation after cooling meet the thermal elongation test results of 120°C cross-linked halogen-free low-smoke flame retardant materials specified in T / CAS 566-2022;

[0032] 2. The water blocking performance test of the cable refers to the water permeability test in Appendix F of GB / T 12706.2-2020. During the entire test period, no water seeps out from both ends of the sample;

[0033] 3. The thickness of the thinnest point of the nylon sheath layer 5 is not less than 0.5 mm;

[0034] 4. The rat and ant resistance test of the cable refers to the requirements of GB / T 34016-2017. The surface of the nylon sheath layer 5 has no rat bite marks or visible bite marks, but the bite depth is less than 1mm; and there should be no traces of termite infestation on the surface;

[0035] 5. Other structural characteristics, electrical properties and non-electrical properties of the cable meet the requirements of T / CAS 566-2022 standard.

[0036] Although the disclosure is as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A water-blocking, rat-proof and ant-proof photovoltaic cable, characterized in that: The invention comprises a conductor (1), wherein the outer jacket of the conductor (1) is provided with a conductor water-blocking layer (2), the outer jacket of the conductor water-blocking layer (2) is provided with an insulating layer (3), the outer jacket of the insulating layer (3) is provided with an insulating water-blocking layer (4), and the outer jacket of the insulating water-blocking layer (4) is provided with a rat-ant-proof layer; The rat and ant-proof layer comprises a nylon sheath layer (5) and an outer sheath layer (6); The conductor (1) is a flexible aluminum alloy soft conductor; The conductor water-blocking layer (2) is made of an insulating double-sided water-blocking tape; The insulating layer (3) is made of 120°C irradiation cross-linked halogen-free, low-smoke, flame-retardant polyolefin insulating material specially used for photovoltaic cables; The insulating water-blocking layer (4) is an insulating double-sided water-blocking tape; The nylon sheath layer (5) is made of polyamide 12 material; The thickness of the nylon sheath layer (5) at its thinnest point is not less than 0.5 mm; The nylon sheath layer (5) contains a rat and ant-proof chemical additive; The outer sheath layer (6) is made of 120°C irradiation cross-linked halogen-free, low-smoke, flame-retardant polyolefin sheath material specially used for photovoltaic cables.

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