CN211628718U - A kind of copper stranded wire for environmental protection and energy saving photovoltaic cable - Google Patents

Abstract

The utility model belongs to the technical field of photovoltaic cables, and discloses a copper stranded wire for environmental protection and energy saving photovoltaic cables, which comprises a central wire core, a stranded wire, a copper wire braided layer and a protective layer, wherein the central wire core is a first copper stranded wire, The first copper stranded wire includes a carbon fiber composite core and a trapezoidal copper wire stranded outside the carbon fiber composite core, the stranded wire includes a plurality of second copper stranded wires, and the second copper stranded wire includes a carbon fiber composite core and a trapezoidal copper wire. Trapezoidal copper wires stranded on the outside of the carbon fiber composite core, the diameter of the first copper stranded wire is larger than that of the second copper stranded wire, and a plurality of the second copper stranded wires are stranded on the outside of the first copper stranded wire, the The copper wire braided layer is arranged on the outer side of the second copper stranded wire layer, and the protective layer is arranged on the outer side of the copper wire braided layer. . The copper stranded wire has excellent mechanical properties, high electrical conductivity, good energy saving effect, high safety performance and environmental protection.

Description

A kind of copper stranded wire for environmental protection and energy saving photovoltaic cable

technical field

The utility model belongs to the technical field of photovoltaic cables, in particular to a copper stranded wire for environmental protection and energy saving photovoltaic cables.

Background technique

With the development of the global economy, fossil energy sources such as coal, oil and natural gas are gradually unable to meet the increasing demand and environmental protection requirements, and the political and economic situation in many oil and natural gas production areas around the world is unstable, and clean energy is gradually being used by most of the Regional attention. As one of the most important clean energy sources, solar energy has been widely used. Photovoltaic is the abbreviation of solar photovoltaic power generation system. It is a new type of power generation system that uses the photovoltaic effect of solar cell semiconductor materials to directly convert solar radiation energy into electrical energy. There are two modes of independent operation and grid-connected operation.

Photovoltaic cables are an important and indispensable part of the solar photovoltaic power generation system. Usually, the low-voltage direct current generated by photovoltaic power generation is converted into alternating current and then output. The cable connecting the photovoltaic modules and the AC/DC inverter is the photovoltaic cable. Therefore, the photovoltaic cable, as the backbone of the power transmission of photovoltaic power generation facilities, is directly related to the safety, reliability and advancement of the solar photovoltaic power generation system. Most photovoltaic power stations are built outdoors, so cables are required to have good flame retardant, oil-proof, anti-sunlight aging, acid and alkali resistance, ozone resistance, high temperature and cold resistance, halogen-free and other characteristics. Moreover, during the installation and maintenance of photovoltaic cables, photovoltaic cables need to be routed on the sharp edges of roof structures, etc., and the cables must withstand pressure, bending, tension, cross tensile load and strong impact.

The conductors in the existing photovoltaic cables generally use tin-plated oxygen-free copper soft conductors, and the soft copper stranded wires that constitute the conductors are mostly pure copper. The tensile strength of pure copper wires is low, and the mechanical properties are poor. The impact strength depends on the cable sheath. If the cable sheath is not strong enough, the cable insulation will be seriously damaged, affecting the service life of the cable, or causing problems such as short circuit, fire and personal injury. It can be seen that, The safety performance of existing photovoltaic cables is poor. In addition, the cost of using pure copper conductors is high. Therefore, there is an urgent need to provide a copper stranded wire for photovoltaic cables, which has high strength, high safety performance, and can ensure its electrical conductivity, saves costs, and is environmentally friendly and energy-saving.

Utility model content

In view of the above situation, the purpose of this utility model is to provide a copper stranded wire for environmental protection and energy saving photovoltaic cables. Through reasonable structural settings, it has high strength, excellent electrical conductivity, good safety performance, energy saving and environmental protection.

To achieve the above object, the utility model adopts the following technical solutions:

An environment-friendly and energy-saving copper stranded wire for photovoltaic cables, comprising a central wire core, a stranded wire, a copper wire braided layer and a protective layer, wherein the central wire core is a first copper stranded wire, and the first copper stranded wire comprises a carbon fiber composite wire a core and a trapezoidal copper wire stranded on the outside of the carbon fiber composite core, the stranded wire includes a plurality of second copper stranded wires, the second copper stranded wire includes a carbon fiber composite core and a trapezoidal copper wire stranded on the outside of the carbon fiber composite core The diameter of the first copper stranded wire is larger than that of the second copper stranded wire, a plurality of the second copper stranded wires are stranded on the outside of the first copper stranded wire, and the copper wire braid is arranged on the second copper stranded wire On the outer side of the wire layer, the protective layer is arranged on the outer side of the copper wire braided layer, and the protective layer includes an insulating layer, a steel wire braided layer and a wear-resistant layer sequentially arranged from the inside to the outside.

In the present utility model, the number of layers of trapezoidal copper wires in which the first copper stranded wire and the second copper stranded wire are twisted can be determined according to actual needs. Preferably, the first copper stranded wire includes two layers of trapezoidal copper wires, the second copper stranded wire includes a single layer trapezoidal copper wire, and eight second copper stranded wires are provided, and eight of the second copper stranded wires are provided. The stranded wire is stranded on the outside of the first copper stranded wire in a single layer.

In the utility model, the trapezoidal copper wire is a tin-plated copper wire, and the copper wire of the copper wire braided layer is a tin-plated copper wire. The use of tin-plated copper wire or tin-plated copper wire can prevent copper from being exposed to the air and be oxidized, which affects the conductivity of the copper wire.

According to the utility model, the carbon fiber composite core is a single core rod made of carbon fiber as the central layer and outer covering of glass fiber. The carbon fiber composite core is in the prior art, and can be prepared by referring to conventional methods. For example, the fiber composite core is a single mandrel formed by carbon fiber and a central layer and glass fiber cladding. After stretching the carbon fiber and glass fiber, impregnation Composite core wire formed in epoxy resin and then cured at high temperature.

Preferably, the insulating layer is a radiation cross-linked low-smoke halogen-free flame retardant polyolefin insulating layer. The insulating layer is made of radiation cross-linked low-smoke halogen-free flame retardant polyolefin insulating material, for example, the grade of FDW7125J insulating material can be selected.

Preferably, the wear-resistant layer is a wear-resistant rubber layer. The wear-resistant layer is made of wear-resistant rubber, which is a conventional wear-resistant material.

The components not limited in the present invention are all made by conventional means in the art, for example, trapezoidal copper wire, copper wire braided layer, steel wire braided layer, etc. can be prepared according to the prior art.

The copper stranded wire for environmental protection and energy saving photovoltaic cable of the present invention has the following advantages:

1) The copper stranded wire of the present invention can increase the strength of the photovoltaic cable through the use of the carbon fiber composite core, improve the mechanical properties of the cable, save the use of copper, and at the same time ensure the high electrical conductivity of the cable, and the energy saving effect is good.

2) The first copper stranded wire and the second copper stranded wire in the copper stranded wire of the utility model are both stranded with trapezoidal copper wires, so that the obtained copper stranded wire has a smaller outer diameter and a higher density under the same cross-section. High, which is beneficial to the improvement of the performance of the copper stranded wire; in addition, setting the diameter of the first copper stranded wire to be larger than the diameter of the second copper stranded wire is also to reduce the size of the second copper stranded wire after the first copper stranded wire is twisted. The gap between the two increases the density of the copper stranded wire, thereby improving the performance of the copper stranded wire.

3) The arrangement of the copper wire braided layer in the utility model can strengthen the electrical conductivity of the cable, and at the same time play a shielding effect of binding the twisted wire and preventing electromagnetic interference.

4) The protective layer in this utility model includes an insulating layer in contact with the copper wire braided layer, a steel wire braided layer that provides tensile strength and prevents damage from external forces, and an outermost wear-resistant layer, which further enhances the tensile performance while preventing leakage. , and prevent the danger of cable sheath rupture caused by friction in the process of pulling the cable, thereby improving the safety performance of the photovoltaic cable.

Description of drawings

FIG. 1 is a schematic structural diagram of a copper stranded wire for an environment-friendly and energy-saving photovoltaic cable according to an embodiment.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

Example

As shown in FIG. 1, a copper stranded wire for environmental protection and energy saving photovoltaic cable includes a central wire core 1, a stranded wire 2, a copper wire braided layer 3 and a protective layer, and the central wire core 1 is a first copper stranded wire, The first copper stranded wire includes a carbon fiber composite core 4 and a trapezoidal copper wire 5 stranded outside the carbon fiber composite core 4. The stranded wire 2 includes a plurality of second copper stranded wires, and the second copper stranded wire includes The carbon fiber composite core 4 and the trapezoidal copper wire 5 stranded on the outside of the carbon fiber composite core 4, the diameter of the first copper stranded wire is larger than that of the second copper stranded wire, and a plurality of the second copper stranded wires are stranded on the first copper stranded wire. The outer side of the stranded wire, the copper wire braided layer 3 is arranged on the outer side of the second copper stranded wire layer, the protective layer is arranged on the outer side of the copper wire braided layer, and the protective layer includes insulating layers arranged sequentially from the inside to the outside. 6. Steel wire braided layer 7 and wear-resistant layer 8.

The first copper stranded wire includes two layers of trapezoidal copper wires 5, the second copper stranded wire includes a single-layer trapezoidal copper wire 5, there are eight second copper stranded wires, and eight second copper stranded wires are provided. The wire is stranded on the outside of the first copper stranded wire in a single layer.

The trapezoidal copper wire 5 is a tinned copper wire, and the copper wire of the copper wire braided layer 7 is a tinned copper wire.

The carbon fiber composite core 4 is a single core rod made of carbon fiber as the center layer and outer covering of glass fiber.

The insulating layer 6 is a radiation cross-linked low-smoke halogen-free flame retardant polyolefin insulating layer.

The wear-resistant layer 8 is a wear-resistant rubber layer.

The copper stranded wire for environmental protection and energy saving photovoltaic cables of the utility model has excellent mechanical properties, high electrical conductivity, good energy saving effect, high safety performance and environmental protection.

Embodiments of the present invention have been described above, and the foregoing description is exemplary, not exhaustive, and not limiting of the disclosed embodiments. Numerous modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims (6)

1. The utility model provides an environmental protection and energy saving copper strand wires for photovoltaic cable, includes central sinle silk and stranded wire, its characterized in that: still include copper wire weaving layer and protective layer, the center sinle silk is first copper strand wires, first copper strand wires include carbon-fibre composite core and the trapezoidal copper line of transposition in the carbon-fibre composite core outside, the stranded wire includes many second copper strand wires, second copper strand wires include carbon-fibre composite core and the trapezoidal copper line of transposition in the carbon-fibre composite core outside, the diameter of first copper strand wires is greater than second copper strand wires, many the transposition of second copper strand wires is in the outside of first copper strand wires, the outside on second copper strand wires layer is located to the copper wire weaving layer, the outside of copper wire weaving layer is located to the protective layer, the protective layer includes insulating layer, steel wire weaving layer and the wearing layer that from interior to exterior set gradually.

2. The copper stranded wire for the environment-friendly energy-saving photovoltaic cable according to claim 1, characterized in that: first copper strands includes two-layer trapezoidal copper line, second copper strands includes individual layer trapezoidal copper line, second copper strands is equipped with eight, eight second copper strands is the individual layer and twists in the outside of first copper strands.

3. The copper stranded wire for the environment-friendly energy-saving photovoltaic cable according to claim 1, characterized in that: the trapezoidal copper wire is a tinned copper wire, and the copper wire of the copper wire braid layer is a tinned copper wire.

4. The copper stranded wire for the environment-friendly energy-saving photovoltaic cable according to claim 1, characterized in that: the carbon fiber composite core is a single core rod which takes carbon fiber as a central layer and is coated with glass fiber.

5. The copper stranded wire for the environment-friendly energy-saving photovoltaic cable according to claim 1, characterized in that: the insulating layer is a radiation crosslinking low-smoke halogen-free flame-retardant polyolefin insulating layer.

6. The copper stranded wire for the environment-friendly energy-saving photovoltaic cable according to claim 1, characterized in that: the wear-resistant layer is a wear-resistant rubber layer.

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