CN217468042U - But high performance aluminum alloy core direct-burried photovoltaic cable - Google Patents

Abstract

The utility model relates to a but high performance aluminum alloy core direct-burried photovoltaic cable, including conductive core, conductive core's outer crowded package has the insulating layer, fills the PP filling rope between the stranded conductive core, in the outer crowded fire protection inner sheath of transposition sinle silk, the outer of fire protection inner sheath has the water blocking layer around the package, the outer of water blocking layer is around the package armor, the crowded resistant ultraviolet radiation oversheath of package in the outside of armor. The utility model discloses an aluminum alloy conductor cable can reduce cost. The aluminum alloy core cable overcomes the defects of heavy weight and high price of the copper core cable, the weight of the aluminum alloy conductor can be reduced by 50 percent compared with the weight of the copper conductor, and the cost of the aluminum alloy conductor is only 30 to 40 percent of that of the copper conductor, so the aluminum alloy core cable is cheaper than the copper core cable and has low transportation cost. The aluminum alloy cable has better corrosion resistance than a pure copper cable, and the service life of the aluminum alloy cable is 10 years later than that of the pure copper cable. The photovoltaic cable with the aluminum alloy core has the advantages of light weight, outstanding cost performance and wide market prospect.

Description

But high performance aluminum alloy core direct-burried photovoltaic cable

Technical Field

The application relates to the field of photovoltaic electric wires and cables, in particular to a high-performance aluminum alloy core directly-buried photovoltaic cable.

Background

With the rapid development of solar energy technology, solar energy is also widely applied in China. The traditional cable for the photovoltaic power generation system generally adopts a tinned stranded copper conductor, an extruded irradiation cross-linked polyolefin insulation and a sheath, but the cable is heavy and high in cost. In addition, the construction fund subsidy of the photovoltaic power generation project in the countries in the last two years is less and less, and if the cable with the tin-plated stranded copper conductor, the radiation cross-linked polyolefin insulation and the sheath is continuously adopted, the cost of the photovoltaic construction project is higher. In the era of photovoltaic flat price internet surfing, the cost of a control system is very critical. In the last decade, the price of the components and the inverter has dropped by 90%, which has contributed greatly to the overall cost reduction of the photovoltaic system, but the cost of the cables has not dropped. In large projects, the cable accounts for 10% of the system, which is higher than the inverter. In fact, as long as the design and the installation are proper, the aluminum alloy conductor cable is adopted on the premise of ensuring the normal operation and the safety of the system, and the cost can be reduced.

SUMMERY OF THE UTILITY MODEL

An object of this application embodiment is to provide a but high performance aluminum alloy core direct-burried photovoltaic cable, has excellent creep resistance, tensile strength, pliability, blocks water, performances such as fire prevention corrosion resistance.

In order to achieve the above purpose, the present application provides the following technical solutions:

the embodiment of the application provides a but high performance aluminum alloy core direct-burried photovoltaic cable, including conductive core, conductive core's outer crowded package has the insulating layer, fills the PP filling rope between the stranded conductive core, and stranded conductive core and the transposition of the PP filling rope of packing form the transposition sinle silk, at the outer extrusion fire prevention inner sheath of transposition sinle silk, the outer of fire prevention inner sheath has the water blocking layer around the package, and the skin of water blocking layer is around the package armor, and the outer crowded package of the outside of armor is able to bear or endure ultraviolet radiation oversheath.

The conductive wire core is formed by twisting an aluminum alloy single wire with the wire diameter of 0.3-3.0 mm through a wire bundling machine.

The waterproof layer is formed by lapping a layer of waterproof tape with the thickness of 0.3mm by a lapping machine in an overlapping mode.

The armor layer is a galvanized steel strip armor layer, a double-layer galvanized steel strip armor spiral gap is adopted for wrapping, and the middle part of the outer steel strip is positioned above the gap of the inner metal strip.

The galvanized steel strip joint of the armor layer is firmly welded.

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

1. the utility model discloses a 8000 series aluminum alloy conductor that conductive core adopted has that creep resistance is good, corrosion resisting property is good, tensile strength is high, the pliability is good, the bounce is little, light in weight, energy-concerving and environment-protective, simple to operate is swift, save the cost by a wide margin.

2. This photovoltaic cable is provided with the interior sheath of fire prevention, when the conflagration breaing out, avoids the cable core to receive the circuit short circuit harm that flame burns out and cause, ensures the security and the permanence of cable operation.

3. This photovoltaic cable is provided with the water blocking layer, can avoid the photovoltaic cable to receive the hidden danger of vapor influence and short circuit, makes cable conductor life longer, also improves the safe and reliable of cable work.

4. This photovoltaic cable is provided with the armor, and it has good corrosion resistance, anti external pulling force, pressure performance, can remove the poling from and lay, has increased the radiating rate of conductor sinle silk, has improved the current-carrying capacity.

5. The combination of the anti-corrosion wear-resistant layer and the ultraviolet radiation resistant outer sheath of the photovoltaic cable improves the aging resistance, corrosion resistance and ultraviolet radiation resistance of the photovoltaic cable. By combining the advantages, the cable can be used for a long time in harsh environment.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a schematic view of the overall structure of the embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The terms "first," "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily being construed as indicating or implying any actual such relationship or order between such entities or actions.

If fig. 1, to the not enough that exists among the prior art, the embodiment of this application provides a but high performance aluminum alloy core direct-burried photovoltaic cable, including conductive core 1, conductive core 1's outer crowded package has insulating layer 2, fill PP filling rope 3 between the stranded conductive core, stranded conductive core forms the transposition sinle silk with 3 transposition of PP filling rope of packing, at the outer crowded fire prevention inner sheath 4 of the outer extrusion of transposition sinle silk, the outer of fire prevention inner sheath 4 has water blocking layer 5 around the package, water blocking layer 5's outer is around package armor 6, the resistant ultraviolet radiation oversheath 7 of the crowded package in the outside of armor 6.

Further, the conductive wire core 1 is an 8000 series aluminum alloy conductor.

Further, the cable is drawn by adopting an aluminum alloy rod with a flexible aluminum alloy conductor diameter of 9.5mm and an aluminum alloy large drawing machine, an aluminum alloy medium drawing machine and a small drawing machine to obtain an aluminum alloy single wire with the wire diameter of 0.3-3.0 mm.

Further, the 8000-series aluminum alloy stranded conductor is stranded by a 630-type frame type wire bundling machine, the paying-off tension is adjusted in the stranding process, the optimal distance between a doubling die and a wire distributing plate is selected, no broken wire exists, the stranded conductor has no aluminum burrs, the pitch is reasonable, after the conductor is subjected to heat treatment in a trolley type aging furnace, the tensile strength of a single aluminum alloy wire is 98-159 mpa, the breaking elongation is not lower than 10%, and the repeated bending frequency of a single wire is not less than 25 times.

Further, the insulating layer 2 is made of an irradiation cross-linking low-smoke halogen-free flame-retardant polyolefin material.

Preferably, the outer sheath 7 is also made of irradiation cross-linked low-smoke halogen-free flame-retardant polyolefin. The irradiation crosslinking low-smoke halogen-free flame-retardant polyolefin can endow the photovoltaic cable with excellent high-low temperature alternation resistance, strong ultraviolet resistance, friction resistance and salt mist resistance. Meanwhile, the ultraviolet radiation resistant outer sheath 7 also has the characteristics of good hydrolysis resistance, rat and ant prevention, low smoke, zero halogen and flame retardance. The double-deck setting of resistant ultraviolet radiation oversheath 7 and insulating layer 2 lets the photovoltaic cable can use under adverse circumstances for a long time, satisfies the photovoltaic system's that open-air laid needs.

Furthermore, the insulating layer 2 and the ultraviolet radiation resistant outer sheath 7 are formed by extruding through a proper extruder, and reasonable extrusion temperature is set, so that the surface of the cable core is smooth and flat, and the phenomena of scratch, scorching, degumming, hole punching, bulging, ridging, pimples, uneven thickness, bamboo joint shape and the like are avoided.

Further, after the insulation layer 2 and the ultraviolet radiation resistant outer sheath 7 are irradiated and crosslinked, the insulation layer and the sheath must be subjected to a thermal extension test respectively under the following conditions: 250 +/-3 ℃/15min, and satisfies the following conditions: the maximum elongation under load is not more than 100 percent, and the permanent elongation after cooling is not more than 25 percent; the mechanical property requires that the tensile strength is more than or equal to 8MPa and the elongation is more than or equal to 125 percent.

Furthermore, the fireproof inner sheath layer 4 is made of ceramic polyolefin and is extruded by a suitable extruder. The interior sheath of fire prevention 4 can form ceramic flame retardant coating the very first time when receiving outside high temperature, gives cable fire behaviour, prevents the conflagration to the destruction of middling pressure cable, and the guarantee is protected 4 inner structure of fire prevention to be complete effective, increases the life and the security performance of cable.

Further, the waterproof layer 5 is wrapped by a waterproof tape with the thickness of 0.3mm in a lap wrapping manner by a 630 lapping machine.

Further, the armor layer 6 is a stainless steel strip armor layer and is formed by wrapping 500 armoring machines in a clearance wrapping mode, double-layer galvanized steel strip armor spiral clearance wrapping is adopted, and the middle part of an outer layer steel strip is approximately above the clearance of an inner layer metal strip; the steel belt wrapping is compact, the defects of curling edges, edge warping, bag leakage, burrs, openings and the like cannot be caused, the joint of the steel belt must be firmly welded and repaired smoothly, and the lap joint mode is not allowed. The photovoltaic cable has good corrosion resistance, external tension resistance and pressure resistance, the mechanical property of the photovoltaic cable is improved, and the photovoltaic cable can be directly buried and is not easy to damage.

Therefore, the utility model provides a manufacturing method of a high-performance aluminum alloy core directly-buried photovoltaic cable, which not only has excellent water-blocking performance; also has the advantages of excellent flame retardance, fire resistance, weather resistance and corrosion resistance, and good mechanical strength. And the production process is easy to control, and cable manufacturers can produce the photovoltaic system in batches to meet the use requirements of the photovoltaic system at the present stage.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (6)

1. The utility model provides a but high performance aluminum alloy core direct-burried photovoltaic cable, a serial communication port, including conductive core (1), the outer crowded package of conductive core (1) has insulating layer (2), fill PP filling rope (3) between the stranded conductive core, stranded conductive core and the transposition of the PP filling rope (3) of packing form the transposition sinle silk, outer extrusion fire prevention inner sheath (4) at the transposition sinle silk, the skin of fire prevention inner sheath (4) has water blocking layer (5) around the package, the skin of water blocking layer (5) is around package armor (6), the crowded package of the outside of armor (6) is ultraviolet radiation resistant oversheath (7).

2. The high-performance aluminum alloy core directly-buried photovoltaic cable according to claim 1, wherein the conductive wire core (1) is formed by twisting aluminum alloy single wires with the wire diameter of 0.3-3.0 mm by a wire bundling machine.

3. The high-performance aluminum alloy core directly-buried photovoltaic cable of claim 1, wherein the stranded wire core is formed by stranding with a cabling machine.

4. The high-performance aluminum alloy core direct-burried photovoltaic cable of claim 1, characterized in that the water-blocking layer (5) is formed by lapping a layer of water-blocking tape with a thickness of 0.3mm around a lapping machine.

5. The high-performance aluminum alloy core direct-burried photovoltaic cable of claim 1, characterized in that the armor layer (6) is a galvanized steel strip armor layer, a double-layer galvanized steel strip armor spiral gap wrapping is adopted, and the middle part of the outer steel strip is positioned above the gap of the inner metal strip.

6. The high-performance aluminum alloy core direct-burried photovoltaic cable of claim 4, characterized in that the galvanized steel strip joint of the armor layer (6) is welded firmly.

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