Composite multifunctional rat-proof and ant-proof photovoltaic cable

Abstract

The utility model relates to a composite multifunctional rat-proof and ant-proof photovoltaic cable, and belongs to the technical field of cables. According to the technical scheme, a filling layer (3) is arranged among a photovoltaic wire core, a grounding wire core, a communication wire core and a control wire core to form a cable core; a halogen-free flame-retardant layer (14), an inner protective layer (15), a rat-and-ant-proof layer (16) and an outer protective layer (17) are sequentially arranged outside the cable core; a second insulating layer (5) is extruded outside a second conductor (4) of each communication wire core to form an insulating wire core, a plurality of insulating wire cores are twisted in pairs and then are wrapped by a sub-shielding layer on the outer surface to form a wire group wire core, a plurality of wire group wire cores are twisted to form a wire group cable, and a cabling wrapping tape, a general wrapping shielding layer and a sheath layer are sequentially arranged outside the wire group cable. According to the utility model, the capabilities of signal transmission and circuit control are increased, so that the photovoltaic cable has multiple functions, and the automation level of the circuit is improved; the cable has good halogen-free and flame-retardant performance, mechanical performance and rat-and-ant-proof performance, and the reliability and safety of long-term operation of the cable are greatly improved.

Description

Technical Field

[0001] The utility model relates to a composite multifunctional rat-ant-proof photovoltaic cable, belonging to the technical field of cables. Background Art

[0002] Traditional photovoltaic cables are mostly single-core cables, consisting of insulation and sheath, with simple structure and single product function, without control and communication functions. At the same time, traditional photovoltaic cables have poor mechanical protection performance and are easily mechanically damaged when laid outdoors, affecting the safety of circuit operation.

[0003] At the same time, photovoltaic power stations are usually built in areas far away from towns with high biodiversity. Traditional photovoltaic cables have poor anti-rat and ant performance and are extremely susceptible to biological attacks, which affects the life of the cables. Utility Model Content

[0004] The utility model aims to provide a composite multifunctional rat- and ant-proof photovoltaic cable, which adds grounding cores, communication cores and control cores, increases the capabilities of signal transmission and circuit control, has good halogen-free, flame-retardant, mechanical and rat- and ant-proof properties, greatly improves the reliability and safety of the cable's long-term operation, and solves the problems existing in the background technology.

[0005] The technical solution of the utility model is:

[0006] A composite multifunctional rat- and ant-proof photovoltaic cable comprises a photovoltaic core, a grounding core, a communication core, a control core, a filling layer, a halogen-free flame retardant layer, an inner sheath, a rat- and ant-proof layer and an outer sheath. A filling layer is arranged between the photovoltaic core, the grounding core, the communication core and the control core to form a cable core; a halogen-free flame retardant layer, an inner sheath, a rat- and ant-proof layer and an outer sheath are arranged in sequence outside the cable core; the communication core comprises two conductors, two insulating layers, a sub-shielding layer, a cabling wrapping tape, a blanket shielding layer and a sheath layer; the second conductor is extruded with two insulating layers to form an insulated core; a plurality of insulated cores are twisted in pairs and the outer surfaces are wrapped with sub-shielding layers to form a wire group core; a plurality of wire group cores are twisted to form a wire group cable; a cable wrapping tape, a blanket shielding layer and a sheath layer are arranged in sequence outside the wire group cable.

[0007] The photovoltaic core is formed by extruding a first conductor and an insulating layer; the grounding core is formed by extruding a fourth conductor and an insulating layer; and the control core is formed by extruding a third conductor and an insulating layer.

[0008] The material of the filling layer is flame retardant filling rope.

[0009] The material of the halogen-free flame retardant layer is a halogen-free flame retardant tape.

[0010] The materials of the inner protective layer and the outer protective layer are both halogen-free, low-smoke, flame-retardant polyolefin.

[0011] The material of the rat-proof ant layer is nylon or metal belt. When the rat-proof ant layer is made of nylon material, the thickness of the nylon can be 0.1-2.0mm; when the rat-proof ant layer is made of metal belt, the metal belt can be brass belt, copper belt, aluminum belt or steel belt, and the thickness of the metal belt can be 0.1-2.0mm.

[0012] The material of the sheath layer is sheath material.

[0013] The sub-shielding layer and the overall shielding layer are both copper wire braided shielding or metal composite tape.

[0014] The twisted pair of communication wire cores is formed by twisting two, three or four insulated wire cores.

[0015] The wire group cable is formed by twisting one or more wire group cores and is tied tightly with a cabling wrapping tape.

[0016] The number of the control cores can be one or more.

[0017] The conductor one and the conductor four are aluminum, aluminum alloy, bare copper or tinned copper conductors, and the conductor two and the conductor three are bare copper or tinned copper conductors.

[0018] The conductor one, conductor two, conductor three and conductor four are all formed by twisting a plurality of single wire bundles.

[0019] The materials of the insulating layer 1 and the insulating layer 4 are thermosetting compounds, and the materials of the insulating layer 2 and the insulating layer 3 are thermoplastic or thermosetting compounds.

[0020] The utility model twists the photovoltaic line core, communication line core, grounding line core and control line core into a cable together so that the photovoltaic cable has the functions of power transmission, signal transmission and circuit control, simplifies line laying and is convenient for later maintenance; the communication line core is provided with a separate shielding layer and a unified shielding layer, the line core has a strong anti-interference ability, and the signal transmission is accurate and reliable; the control line core can realize remote control of the circuit with a high degree of automation; the photovoltaic cable is provided with an anti-rat and ant layer, which is composed of an extruded nylon sheath or a wrapped metal belt, has stable anti-rat and ant performance, good mechanical protection performance, and greatly improves the reliability and safety of the line.

[0021] The beneficial effects of the utility model are: adding grounding cores, communication cores and control cores, increasing the capabilities of signal transmission and circuit control, so that the photovoltaic cable has multiple functions and improves the automation level of the circuit; it has good halogen-free, flame-retardant, mechanical and rat-proof properties, which greatly improves the reliability and safety of the cable in long-term operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] In the figure: conductor one 1, insulation layer one 2, filling layer 3, conductor two 4, insulation layer two 5, sub-shielding layer 6, cabling wrapping tape 7, overall shielding layer 8, sheath layer 9, conductor three 10, insulation layer three 11, conductor four 12, insulation layer four 13, halogen-free flame retardant layer 14, inner sheath 15, rat and ant proof layer 16, outer sheath 17. DETAILED DESCRIPTION

[0024] The present invention will be further described below through examples in conjunction with the accompanying drawings.

[0025] In this embodiment, refer to the attached Figure 1 A composite multifunctional rat-proof photovoltaic cable comprises a photovoltaic core, a grounding core, a communication core, a control core, a filling layer 3, a halogen-free flame retardant layer 14, an inner sheath 15, a rat-proof layer 16 and an outer sheath 17. The filling layer 3 is formed by filling a flame-retardant filling rope in the gap after the photovoltaic core, the grounding core, the communication core and the control core are twisted together; the photovoltaic core, the grounding core, the communication core, the control core and the filling layer form a cable core, the halogen-free flame retardant layer 14 is formed by wrapping a halogen-free flame retardant tape around the outer surface of the cable core, the inner sheath 15 is formed by extruding a halogen-free low-smoke flame-retardant polyolefin on the outer surface of the halogen-free flame retardant layer 14, the rat-proof layer 16 is formed by extruding nylon or a metal tape around the outer surface of the inner sheath 15, and the outer sheath 17 is formed by extruding a halogen-free low-smoke flame-retardant polyolefin on the outer surface of the rat-proof layer 16.

[0026] The photovoltaic core is formed by extruding an insulating layer 2 outside a conductor 1, wherein the conductor 1 is formed by twisting multiple single wires, and the conductor 1 can be aluminum, aluminum alloy, bare copper or tinned copper conductor; the insulating layer 2 is made of halogen-free, low-smoke, flame-retardant polyolefin.

[0027] The grounding wire core is formed by extruding an insulating layer four 13 outside a conductor four 12, and the conductor four 12 is formed by twisting multiple single wires. The conductor four 12 can be aluminum, aluminum alloy, bare copper or tinned copper conductor; the insulating layer four 13 is made of halogen-free low-smoke flame-retardant polyolefin.

[0028] The control line core is formed by extruding an insulating layer 3 11 outside a conductor 3 10 , the conductor 3 10 is formed by twisting multiple single wires, the conductor 3 10 can be a bare copper or galvanized copper conductor, and the insulating layer 3 11 is made of halogen-free, low-smoke, flame-retardant polyolefin.

[0029] The communication line core comprises a conductor 4, an insulating layer 5, a sub-shielding layer 6, a cabling wrapping tape 7, a general shielding layer 8 and a sheath layer 9. The conductor 4 is extruded with an insulating layer 5 to form an insulated wire core. After two, three or four insulated wire cores are twisted, the outer surface is wrapped with a sub-shielding layer 6 to form a wire group core. One or more wire group cores are twisted to form a wire group cable. The wire group cable is sequentially provided with a cable wrapping tape 7, a general shielding layer 8 and a sheath layer 9. The conductor 4 is formed by twisting multiple single wires. The conductor 4 can be a bare copper or galvanized copper conductor. The insulating layer 5 can be made of a material of Halogen-free low-smoke flame-retardant polyolefin can be used, and cross-linked polyethylene or polyethylene insulation can also be used; the sub-shielding layer 6 is made of copper wire braided shielding or metal composite tape wrapped, and bare copper or tinned copper wire is placed under the metal composite tape as a drainage line; the cabling wrapping tape 7 is made of halogen-free flame-retardant tape wrapped around the outer surface of the sub-shielding layer 6; the overall shielding layer 8 is made of copper wire braided shielding or metal composite tape wrapped around the outer surface of the cabling wrapping tape 7, and bare copper or tinned copper wire is placed under the metal composite tape as a drainage line; the sheath layer 9 is made of halogen-free low-smoke flame-retardant polyolefin extruded on the overall shielding layer 8.

[0030] The number of the control cores can be one or more.

[0031] When the rat and ant-proof layer 16 is made of extruded nylon material, the thickness of the nylon can be 0.1-2.0 mm.

[0032] When the rat-proof and ant-proof layer 16 is made of a metal strip, the metal strip may be a brass strip, a copper strip, an aluminum strip or a steel strip, and the thickness of the metal strip may be 0.1-2.0 mm.

[0033] The photovoltaic core, communication core, control core and grounding core are twisted into a cable, the photovoltaic core is responsible for transmitting electricity, the communication core transmits signals; the control core can realize remote circuit control with a high degree of automation; the grounding core forms a loop with the earth to protect the safety of the power system. By twisting various functional cores into a cable, a rat-ant-proof photovoltaic cable with signal transmission and control functions is realized.

[0034] The communication line core is composed of conductor 2 4, insulation layer 2 5, sub-shielding layer 6, cabling wrapping tape 7, overall shielding layer 8 and sheath layer 9. The sub-shielding after twisting and the overall shielding after cabling together constitute the shielding system of the communication line core. The communication line core has good shielding effect, strong anti-interference ability, good signal transmission accuracy and high reliability.

[0035] The first insulation layer of the photovoltaic core, the fourth insulation layer of the grounding core, the third insulation layer of the control core, the filling layer, the sheath layer of the communication core, the halogen-free flame retardant layer, the inner sheath and the outer sheath are all made of halogen-free flame retardant materials, and the cable is flame retardant, environmentally friendly and highly safe.

[0036] The anti-rat and ant layer is formed by extruding nylon, or by wrapping a metal belt around the outer surface of the inner protective layer. Nylon and metal belts have good mechanical properties and are anti-rat and anti-ant, can effectively protect the inner protective wire core, and improve the safety and reliability of the cable; the outer protective layer 17 is extruded by halogen-free, low-smoke, flame-retardant polyolefin that is anti-rat and ant, which enhances the anti-rat and ant performance of the outer sheath and the overall anti-rat and ant performance of the photovoltaic cable.

[0037] The utility model solves the problem of single function of traditional photovoltaic cables by adopting the structural design of photovoltaic core, grounding core, communication core and control core, so that it has the functions of power transmission, signal transmission and circuit control, simplifies the line laying and facilitates the later maintenance. By adopting the design of halogen-free flame retardant insulation, flame retardant filling, halogen-free flame retardant layer, halogen-free flame retardant inner sheath and halogen-free flame retardant outer sheath, it is ensured that the cable has good halogen-free flame retardant performance. Through the design of separate shielding and overall shielding layer of communication core, the anti-interference performance of communication core to the external environment is greatly improved, and the accuracy of signal transmission is improved. At the same time, there is a control core in the photovoltaic cable, which can realize remote control of the circuit and has a high degree of automation. Due to the use of anti-rat and ant layer and anti-rat and ant halogen-free low-smoke flame retardant outer sheath, the overall mechanical properties of the cable and the anti-rat and ant performance are improved.

[0038] In summary, compared with the traditional photovoltaic cable, the utility model adds a grounding core, a communication core and a control core, increases the signal transmission and circuit control capabilities, enables the photovoltaic cable to have multiple functions, and improves the automation level of the circuit. Through the structural design of halogen-free flame-retardant polyolefin insulation, flame-retardant filling, halogen-free flame-retardant layer, and halogen-free flame-retardant sheath, the cable has good halogen-free and flame-retardant properties. Due to the design of the rat-proof layer of extruded nylon or wrapped metal tape and the rat-proof halogen-free low-smoke flame-retardant polyolefin outer sheath, the cable has good mechanical properties and rat-proof properties, which greatly improves the reliability and safety of the cable in long-term operation.

Claims

1. A composite multifunctional anti-rat and ant photovoltaic cable, characterized by: The invention comprises a photovoltaic core, a grounding core, a communication core, a control core, a filling layer (3), a halogen-free flame retardant layer (14), an inner sheath (15), an anti-rat and ant layer (16) and an outer sheath (17); a filling layer (3) is arranged between the photovoltaic core, the grounding core, the communication core and the control core to form a cable core; a halogen-free flame retardant layer (14), an inner sheath (15), an anti-rat and ant layer (16) and an outer sheath (17) are arranged in sequence outside the cable core; the communication core comprises a second conductor (4), a second insulating layer (5), a sub-shielding layer (6), a cabling wrapping tape (7), a general shielding layer (8) and a sheath layer (9); the second conductor (4) is extruded with a second insulating layer (5) to form an insulated core; a plurality of insulated cores are twisted and the outer surfaces are wrapped with a sub-shielding layer (6) to form a wire group core; a plurality of wire group cores are twisted to form a wire group cable; a cable group cable is arranged in sequence outside the wire group cable.

2. A composite multifunctional anti-rat and ant photovoltaic cable according to claim 1, characterized in that: The photovoltaic core is formed by extruding a conductor one (1) and an insulating layer one (2) outside; the grounding core is formed by extruding a conductor four (12) and an insulating layer four (13) outside; and the control core is formed by extruding a conductor three (10) and an insulating layer three (11) outside.

3. A composite multifunctional anti-rat and ant photovoltaic cable according to claim 1 or 2, characterized in that: The material of the filling layer (3) is flame-retardant filling rope.

4. A composite multifunctional rat and ant proof photovoltaic cable according to claim 1 or 2, characterized in that: The material of the halogen-free flame retardant layer (14) is a halogen-free flame retardant tape.

5. A composite multifunctional anti-rat and ant photovoltaic cable according to claim 1 or 2, characterized in that: The inner protective layer (15) and the outer protective layer (17) are both made of halogen-free, low-smoke, flame-retardant polyolefin.

6. A composite multifunctional rat and ant-proof photovoltaic cable according to claim 1 or 2, characterized in that: The material of the rat and ant-proof layer (16) is nylon, and the thickness of the nylon is 0.1-2.0 mm.

7. A composite multifunctional rat and ant proof photovoltaic cable according to claim 1 or 2, characterized in that: The material of the rat and ant-proof layer (16) is a metal strip, which is a brass strip, a copper strip, an aluminum strip or a steel strip, and has a thickness of 0.1-2.0 mm.

8. A composite multifunctional anti-rat and ant photovoltaic cable according to claim 1 or 2, characterized in that: The sub-shielding layer (6) and the overall shielding layer (8) are both copper wire braided shielding or metal composite tape.

9. A composite multifunctional anti-rat and ant photovoltaic cable according to claim 1 or 2, characterized in that: The twisted pair of communication wire cores is formed by twisting two, three or four insulated wire cores.

10. A composite multifunctional rat and ant-proof photovoltaic cable according to claim 1 or 2, characterized in that: The wire group cable is formed by twisting one or more wire group cores and is tied tightly with a cabling wrapping tape.

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