阅读说明：本技术 一种无卤光伏电缆 (Halogen-free photovoltaic cable ) 是由 胡超强 黄应敏 尤占山 邹科敏 徐加健 刘晓明 魏鹏飞 王骞能 陈雪儿 胡玉莹 于 2019-11-29 设计创作，主要内容包括：本发明涉及电缆技术领域,具体涉及一种无卤光伏电缆,包括由内而外依次排列的导体、绝缘层和护套层,导体采用56根直径为0.3mm的镀锡铜线绞合,绞合间距为40-44mm,束绞外径为2.6mm,绝缘层的材料为黑色辐照交联聚烯烃绝缘材料,平均厚度为0.85mm,最薄点为0.75mm,绝缘层的外径为4.30-4.4mm,护套层的材料为黑色辐照交联聚烯烃绝缘材料。(The invention relates to the technical field of cables, in particular to a halogen-free photovoltaic cable which comprises a conductor, an insulating layer and a sheath layer which are sequentially arranged from inside to outside, wherein the conductor is stranded by 56 tinned copper wires with the diameter of 0.3mm, the stranding interval is 40-44mm, the external diameter of a strand is 2.6mm, the insulating layer is made of a black irradiation crosslinking polyolefin insulating material, the average thickness is 0.85mm, the thinnest point is 0.75mm, the external diameter of the insulating layer is 4.30-4.4mm, and the sheath layer is made of a black irradiation crosslinking polyolefin insulating material.)

1. A halogen-free photovoltaic cable, characterized in that: the cable comprises a conductor, an insulating layer and a sheath layer which are sequentially arranged from inside to outside, wherein the conductor is stranded by 56 tinned copper wires with the diameter of 0.3mm, the stranding distance is 40-44mm, the external diameter of the strand is 2.6mm, the insulating layer is made of a black irradiation crosslinking polyolefin insulating material, the average thickness is 0.85mm, the thinnest point is 0.75mm, the external diameter of the insulating layer is 4.30-4.4mm, the sheath layer is made of a black irradiation crosslinking polyolefin insulating material, the average thickness is 0.99mm, the thinnest point is 0.80mm, and the external diameter of the sheath layer is 6.10-6.20 mm; the insulating layer is coated with talcum powder; the sheath layer comprises the following components in parts by weight:

25-40 parts of SEBS;

10-20 parts of styrene thermoplastic elastomer;

4-8 parts of polystyrene;

2-5 parts of hexamethylene diisocyanate;

1-2 parts of ethyl thioglycolate;

15-30 parts of melamine ammonium phosphate;

5-10 parts of hydromagnesite;

2-4 parts of melamine pyrophosphate;

1-5 parts of polyphenyl ether;

20-35 parts of ethylene-vinyl acetate copolymer;

0.5-1 part of hydroxyl silicone oil;

0.2-0.9 parts of oleamide;

0.4-1.5 parts of antioxidant;

1-3 parts of polyvinylidene fluoride;

0.4-0.8 part of 4-oxo-isophorone.

2. The halogen-free photovoltaic cable of claim 1, wherein: the elongation of the insulating layer and the sheath layer is 200-300%.

3. The halogen-free photovoltaic cable of claim 1, wherein: the insulating layer and the sheath layer are extruded in a grading mode.

4. The halogen-free photovoltaic cable of claim 1, wherein: after the insulating layer and the sheath layer are extruded, printed and subjected to one-time irradiation crosslinking, the load elongation of the insulating layer is 30% -40%, and the load elongation of the sheath layer is 40% -50%.

5. The halogen-free photovoltaic cable of claim 1, wherein: the sheath layer is made of a frost-proof material.

Technical Field

The invention relates to the technical field of cables, in particular to a halogen-free photovoltaic cable.

Background

At present, the solar photovoltaic technology is widely applied, and the photovoltaic electric wire and cable technology matched and connected with the solar photovoltaic technology is gradually put into corresponding research. The solar photovoltaic panel is mostly installed in desert, gobi, mountainous areas, offshore areas and other places which do not occupy cultivated land and have sufficient sunlight irradiation. The places also put higher technical requirements on the aspects of sun protection, water resistance, fire prevention, ultraviolet protection, insect and ant prevention, high temperature resistance, corrosion resistance, fire safety and the like of corresponding photovoltaic cables.

Disclosure of Invention

The invention aims to provide a halogen-free photovoltaic cable with prolonged service life aiming at the defects in the prior art.

The purpose of the invention is realized by the following technical scheme:

a halogen-free photovoltaic cable is provided comprising.

Wherein, the flow rate of the water is controlled by the control unit.

Wherein, the flow rate of the water is controlled by the control unit.

The invention has the beneficial effects that: the conductor adopts 56 tinned copper wires of diameter 0.3mm to strand, and the intensity of cable increases, and the transposition interval is 40-44mm, and the bundle hank external diameter is 2.6mm, the material of insulating layer is black irradiation cross-linked polyolefin insulating material, and average thickness is 0.85mm, and the thinnest point is 0.75mm, the external diameter of insulating layer is 4.30-4.4mm, the material of restrictive coating is black irradiation cross-linked polyolefin insulating material, and average thickness is 0.99mm, and the thinnest point is 0.80mm, the external diameter of restrictive coating is 6.10-6.20mm, and above-mentioned structure sets up for holistic cable intensity increases, and the life-span increases.

Drawings

The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a halogen-free photovoltaic cable according to the present invention.

Fig. 1 includes:

conductor 1, insulating layer 2, talcum powder 3, restrictive coating 4.

Detailed Description

The invention is further described with reference to the following examples.

The specific embodiment of the halogen-free photovoltaic cable comprises a conductor 1, an insulating layer 2 and a sheath layer 4 which are sequentially arranged from inside to outside, wherein the conductor 1 is formed by twisting 56 tinned copper wires with the diameter of 0.3mm, the strength of the cable is increased, the twisting distance is 40-44mm, the outer diameter of a bundle twist is 2.6mm, the insulating layer 2 is made of a black irradiation cross-linked polyolefin insulating material, the average thickness is 0.85mm, the thinnest point is 0.75mm, the outer diameter of the insulating layer 2 is 4.30-4.4mm, the sheath layer 4 is made of a black irradiation cross-linked polyolefin insulating material, the average thickness is 0.99mm, the thinnest point is 0.80mm, and the outer diameter of the sheath layer 4 is 6.10-6.20mm, so that the strength of the whole cable is increased and the service life of the cable is prolonged. The talcum powder 3 is coated outside the insulating layer 2, and plays a role in protecting the insulating layer 2 and the sheath layer 4. The sheath layer 4 is composed of the following components in parts by weight:

25-40 parts of SEBS;

10-20 parts of styrene thermoplastic elastomer;

4-8 parts of polystyrene;

2-5 parts of hexamethylene diisocyanate;

1-2 parts of ethyl thioglycolate;

15-30 parts of melamine ammonium phosphate;

5-10 parts of hydromagnesite;

2-4 parts of melamine pyrophosphate;

1-5 parts of polyphenyl ether;

20-35 parts of ethylene-vinyl acetate copolymer;

0.5-1 part of hydroxyl silicone oil;

0.2-0.9 parts of oleamide;

0.4-1.5 parts of antioxidant;

1-3 parts of polyvinylidene fluoride;

0.4-0.8 part of 4-oxo-isophorone.

The elongation of the insulating layer 2 and the sheath layer 4 is 200-300%.

Insulating layer 2 with restrictive coating 4 is for extruding in grades, because insulating layer 2 with restrictive coating 4's material is the same, and the performance is close, if extrude simultaneously, then can cause insulating layer 2 and restrictive coating 4 to glue, can harm insulating layer 2.

After the insulating layer 2 and the sheath layer 4 are extruded, printed and subjected to one-time irradiation crosslinking, the load elongation of the insulating layer 2 is 30% -40%, and the load elongation of the sheath layer 4 is 40% -50%.

The sheath layer 4 is made of a frost-free material, namely, the surface of the cable does not have a frosting phenomenon after the cable is placed in an environment with the temperature of 95 ℃ and the humidity of 95% for 7 days.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.