CN211479706U

CN211479706U - Flame-retardant photovoltaic cable for ultra-high temperature environment

Info

Publication number: CN211479706U
Application number: CN201922295389.8U
Authority: CN
Inventors: 张亮; 袁星星; 王龙飞
Original assignee: Zhejiang Cardiff Cable Co ltd
Current assignee: Zhejiang Cardiff Cable Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-09-11
Anticipated expiration: 2029-12-19

Abstract

The utility model discloses a fire-retardant photovoltaic cable of ultra-temperature environment from interior to exterior includes in proper order: the cable comprises a conductor, a first flame-retardant layer, an insulating layer, a second flame-retardant layer and a sheath layer, wherein the conductor is a 5-type conductor, the first flame-retardant layer and the second flame-retardant layer are laminated formed by wrapping flame-retardant fire-resistant mica tapes, and the insulating layer and the sheath layer are XLPE layers. The utility model discloses a fire-retardant photovoltaic cable of ultra-temperature environment is fire-retardant good, heat resistance is excellent, the weatherability is good.

Description

Flame-retardant photovoltaic cable for ultra-high temperature environment

Technical Field

The utility model relates to a photovoltaic cable, in particular to fire-retardant photovoltaic cable of ultra-temperature environment.

Background

With the increasing importance of human development on the environment, the photovoltaic technology is one of green energy sources in the future; photovoltaic systems are often installed outdoors (e.g., seaside, desert, house, etc.) in very harsh conditions throughout the year, such as high temperatures (cable temperature 100 ℃ under load) and ultraviolet radiation, rain, sunny days, etc.; in the existing market, the photovoltaic cable connecting wire is an insulation extruded after the tinned conductor is twisted, and finally, an extrusion molding sheath is arranged. Wherein, the insulation and sheath material selected for the connecting wire is PVC, TPE, chloroprene rubber. The working temperature of the materials is between-15 ℃ and 90 ℃, and the common cable material has poor overload resistance, poor flame retardance, poor weather resistance and the like; the use of the cable under the conditions of low temperature, high temperature and severe environment cannot be met, the service life of a photovoltaic system is influenced, short circuit is caused in severe cases, and the personal safety is harmed by fire.

In addition, PVC material is not environment-friendly (containing halogen), has poor bending property at low temperature and has material density of 1.5g/cm³. TPE has poor flame retardant property, the plasticizer in the material is easy to separate out after long-time use, the cable has cracking risk, the safety coefficient is low, and the material density is 1.2g/cm³. The chloroprene rubber material has low temperature resistance and cannot meet the requirement of long-term use of the cable at 100 ℃ under high load.

Therefore, the flame-retardant photovoltaic cable in the ultra-high temperature environment, which has good flame retardance, excellent heat resistance and good weather resistance, needs to be developed.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a fire-retardant photovoltaic cable of ultra-temperature environment.

The technical scheme of the utility model as follows:

the utility model provides a fire-retardant photovoltaic cable of ultra-high temperature environment, from interior to exterior includes in proper order: the cable comprises a conductor, a first flame-retardant layer, an insulating layer, a second flame-retardant layer and a sheath layer, wherein the conductor is a 5-type conductor, the first flame-retardant layer and the second flame-retardant layer are laminated formed by wrapping flame-retardant fire-resistant mica tapes, and the insulating layer and the sheath layer are XLPE layers.

Preferably, the conductor has a cross-sectional area of 16mm²The steel wire is formed by stranding 128 tinned copper wires with the diameter of 0.40 mm.

Preferably, the conductor is S-twisted by 0.40mm monofilament, and after being bunched, the conductor is divided into 19 strands and then twisted again in a regular structure.

Preferably, the XLPE layer has the hardness of 90 +/-3A and the density of 1.1g/cm³The working temperature is-40 to 150 ℃.

Preferably, the XLPE layer is a tubular structure formed by a hollow extrusion process.

Preferably, the thickness of the insulating layer is not less than 0.8 mm.

Preferably, the thickness of the sheath layer is not less than 1.2 mm.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the utility model discloses a through the structure to photovoltaic cable designs: the XLPE layer is excellent in cold resistance and high temperature resistance, and has certain bending performance at the low temperature of-40 ℃, so that the XLPE layer is completely used in cold places, the temperature of a photovoltaic cable is often over 100 ℃ when the photovoltaic cable is fully loaded, the XLPE can stably work at the high temperature of 150 ℃, the stability of a photovoltaic system is ensured, and the XLPE material is small in specific gravity, small in shrinkage rate and easy to color; in addition, the XLPE has excellent flame retardance, the photovoltaic cable after being processed and formed can meet the flame retardant requirement of the American VW-1 (other substances are not ignited after the cable is burnt, and the cable is self-extinguished), and the cable has excellent insulating property, excellent compression deformation resistance, excellent bending property and overload resistance; the cable is wrapped by the double-layer flame-retardant fire-resistant layer, the fire-resistant layer can cut off a fire source when the cable spontaneously burns, personal safety is guaranteed, when a fire disaster happens due to the external reason and the self reason of the photovoltaic system, the fire-resistant layer can continue to work without fear of burning of big fire, reliability of the photovoltaic cable is guaranteed, and absolute safety of the cable is guaranteed due to multi-layer fire resistance; the content effectively improves the high temperature resistance, the low temperature resistance and the fire resistance of the photovoltaic cable, improves the safety of the product, and reduces the harm of the product to people.

Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed Description

The present invention will be further described with reference to the following specific examples. It should be understood that these examples are only for illustrating the present invention, and are not intended to limit the scope of the present invention. In practical applications, the improvement and adjustment made by those skilled in the art according to the present invention still belong to the protection scope of the present invention.

For better illustration of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings.

The present invention will be further described below with reference to specific embodiments.

Examples

An ultra-high temperature environment flame-retardant photovoltaic cable, see fig. 1, sequentially comprises from inside to outside: conductor 1, first fire-retardant layer 2, insulating layer 3, the fire-retardant layer 4 of second, restrictive coating 5, conductor 1 is 5 types of conductors, first fire-retardant layer 2, the fire-retardant layer 4 of second are fire-retardant fire-resistant mica tape around the stratiform of package formation, insulating layer 3, restrictive coating 5 are the XLPE layer.

The conductor 1 has a cross-sectional area of 16mm²The steel wire is formed by stranding 128 tinned copper wires with the diameter of 0.40 mm.

The conductor 1 is firstly twisted in the S direction by 0.40mm monofilaments, and then is divided into 19 strands for regular structure re-twisting after being twisted, so that the wires are more round and neat. Meanwhile, the 19-strand twisted conductor enables the cable to be stressed uniformly, has a good tensile effect and is not easy to damage in the installation process.

The hardness of the XLPE layers 3 and 5 is 90 +/-3A, and the density of the XLPE layers is 1.1g/cm³The working temperature is-40 to 150 ℃.

The XLPE layers 3 and 5 are tubular structures formed by a hollow extrusion method. The hollow extrusion method is the existing method, and the hollow extrusion method is not specifically unfolded here and is formed into a tubular structure.

The thickness of the insulating layer 3 is set according to voltage and is not less than 0.8 mm.

The thickness of the sheath layer 5 is set according to voltage and is not less than 1.2 mm.

The first flame retardant layer 2 was 0.2mm thick and the second flame retardant layer 4 was 0.2mm thick.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a fire-retardant photovoltaic cable of ultra-high temperature environment which from interior to exterior includes in proper order: the cable comprises a conductor, a first flame-retardant layer, an insulating layer, a second flame-retardant layer and a sheath layer, wherein the conductor is a 5-type conductor, the first flame-retardant layer and the second flame-retardant layer are laminated formed by wrapping flame-retardant fire-resistant mica tapes, and the insulating layer and the sheath layer are XLPE layers.

2. The ultra-high temperature environment flame-retardant photovoltaic cable according to claim 1, wherein the conductor has a cross-sectional area of 16mm²The steel wire is formed by stranding 128 tinned copper wires with the diameter of 0.40 mm.

3. The ultra-high temperature environment flame-retardant photovoltaic cable as recited in claim 2, wherein the conductor is S-twisted with 0.40mm monofilaments, and after the S-twisted, the S-twisted conductors are divided into 19 strands and then twisted again in a regular structure.

4. The flame-retardant photovoltaic cable for ultra-high temperature environment according to claim 1, wherein the XLPE layer has a hardness of 90 +/-3A and a density of 1.1g/cm³The working temperature is-40 to 150 ℃.

5. The fire-retardant photovoltaic cable for ultra-high temperature environment according to claim 1, wherein the XLPE layer is a tubular structure formed by hollow extrusion.

6. The ultra-high temperature environment flame-retardant photovoltaic cable according to claim 5, wherein the thickness of the insulating layer is not less than 0.8 mm.

7. The ultra-high temperature environment flame-retardant photovoltaic cable according to claim 5, wherein the thickness of the sheath layer is not less than 1.2 mm.