CN218939313U - Anti-interference low-voltage power cable - Google Patents

Abstract

The utility model discloses an anti-interference low-voltage power cable, which comprises a cable core, wherein the cable core comprises a main line insulating wire core, a ground wire insulating wire core and a tensile reinforcement, an insulating layer, a fireproof layer, an isolating layer, a shielding layer, an inner sheath layer, an armor protective layer, a buffer layer and an outer sheath layer are sequentially coated on the periphery of the cable core from inside to outside, and a filling layer is filled among the main line insulating wire core, the ground wire insulating wire core and the tensile reinforcement of the cable core. The low-voltage power cable has the advantages of reasonable overall structure arrangement, low manufacturing cost, strong anti-interference capability, high tensile strength and the like, can greatly improve the flame-retardant and fire-resistant grade, has simple overall structure, is safe and reliable, has stable performance and strong practicability, and is suitable for popularization and application.

Description

Anti-interference low-voltage power cable

Technical Field

The utility model relates to the technical field of power cables, in particular to an anti-interference low-voltage power cable.

Background

Along with the high-speed development of national economy, the application of the power cable is also becoming more and more widespread, the power cable is a cable product used for transmitting and distributing high-power electric energy in a main line of a power system, and the basic structure of the power cable consists of four parts, namely a wire core (conductor), an insulating layer, a shielding layer and a protective layer. However, the existing power cable has poor anti-interference effect, is difficult to adapt to the market demand, is easy to be interfered by an external magnetic field in the signal transmission process, and is easy to cause errors in signals received by a signal receiving end, so that normal information transmission cannot be performed. Meanwhile, with the development of society, people are increasingly conscious of safety and environmental protection, and requirements on safety and reliability of electric equipment and equipment are also higher and higher. Therefore, the three-phase four-wire system for the low-voltage distribution line is changed into a three-phase five-wire system, and a protective grounding wire is added on the original basis for grounding equipment, so that the harm to human bodies and equipment is reduced when electric equipment is in electric leakage.

Through retrieving, chinese patent grant publication No. (CN 217822193U) discloses an anti-interference low voltage power cable, including support, cable body and supporting sleeve, the outside of support is provided with the supporting sleeve, all be provided with the cable body in the shock strut, the outside of supporting sleeve is provided with the insulating layer, it has the shielding layer to inlay on the insulating layer, the outside of wrapping layer is provided with tie-layer a, tie-layer a's outside is provided with the buffer layer, the outside of buffer layer is provided with tie-layer B, tie-layer B's outside is provided with the armor, the outside of armor is provided with the wearing layer, increases the interference killing feature of cable through setting up shielding layer and armor, increases the intensity of cable through setting up support and supporting sleeve, and the buffer layer is the elastic wire net of cross-section for the cockscomb structure to improve the interference killing feature of cable. In addition, as disclosed in chinese patent (issued to the public number CN 209708701U), a fire-retardant and fireproof low-voltage power cable is disclosed, which includes a cable core, and the periphery of the cable core is sequentially coated with a system-package insulating layer, a system-package fireproof layer, a metal shielding layer, a fire-insulating and heat-insulating layer and an outer coating layer from inside to outside. The utility model has the advantages of small cable outer diameter, light weight, better flame retardance and fire resistance, electromagnetic compatibility, anti-interference performance and reliability guarantee, thereby having longer service life and meeting the environmental requirements.

From the disclosure of the above patent documents, a power cable satisfying the use requirements is provided from different angles, respectively, and the application of the power cable is becoming more and more widespread with the high-speed development of national economy. In order to enhance the competitiveness of enterprises and increase the market share, a power cable different from the prior art is provided so as to satisfy the use.

Disclosure of Invention

The utility model aims to solve the technical problems in the background technology, and provides a power cable which can not only meet the use requirement, but also reduce the manufacturing cost, thereby improving the safety performance and the service life of the power cable, in particular to an anti-interference low-voltage power cable.

In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides an anti-interference low voltage power cable, includes the cable core, the cable core includes three main line insulation core, three ground wire insulation core and four tensile reinforcement, and three main line insulation core contacts each other and constitutes regular triangle structure, is provided with a ground wire insulation core in the marginal space between every adjacent two main line insulation core to the marginal space department between adjacent main line insulation core and ground wire insulation core and the marginal space department between three main line insulation core set up a tensile reinforcement respectively the cable core periphery from inside to outside cladding in proper order has insulating layer, flame retardant coating, isolation layer, shielding layer, inner sheath layer, armor protective layer, buffer layer and oversheath layer to the filling layer has between main line insulation core, ground wire insulation core and the tensile reinforcement of constitution cable core in the insulating layer.

Further, the utility model relates to an anti-interference low-voltage power cable, wherein the main line insulating wire core comprises a copper conductor and a main line inner insulating layer extruded outside the copper conductor, and a main line inner shielding layer is arranged outside the main line inner insulating layer, wherein the copper conductor is formed by stranding a plurality of 5 th or 6 th soft copper conductors or tin-plated copper conductors specified in GB/T3956-2008; the ground wire insulating wire core comprises an aluminum conductor and a ground wire inner insulating layer extruded outside the aluminum conductor, and a ground wire inner shielding layer is arranged outside the ground wire inner insulating layer, wherein the aluminum conductor adopts a plurality of aluminum conductors or aluminum alloy conductors which are formed by 2 nd hinge and prescribed by GB/T3956-2008, and the section of the aluminum conductor is circular or sector-shaped; the main line inner insulating layer and the ground wire inner insulating layer are formed by extrusion of crosslinked polyethylene or polyolefin insulating materials, and the main line inner shielding layer and the ground wire inner shielding layer are both woven by annealed copper wires to form a copper mesh structure, and the weaving density is not less than 80%; the tensile reinforcement is formed by winding a plurality of aramid fiber threads.

Furthermore, the anti-interference low-voltage power cable disclosed by the utility model has the advantages that the filling layer is filled in the gaps among the main wire insulating wire core, the ground wire insulating wire core and the tensile reinforcement part which form the cable core by adopting the halogen-free flame-retardant filling rope, so that the cable can keep roundness.

Further, the anti-interference low-voltage power cable disclosed by the utility model is characterized in that the insulating layer is formed by extruding crosslinked polyethylene or polyolefin insulating materials.

Further, the anti-interference low-voltage power cable disclosed by the utility model is characterized in that the fireproof layer is formed by extruding a poly-perfluoroethylene propylene flame-retardant material.

Furthermore, the anti-interference low-voltage power cable disclosed by the utility model is characterized in that the isolation layer is formed by wrapping three layers of polyester tapes in a positive and negative manner, and the wrapping overlapping rate is not lower than 50%.

Further, the anti-interference low-voltage power cable disclosed by the utility model is characterized in that the shielding layer is woven by annealed copper wires to form a copper mesh belt structure, and the weaving density of the shielding layer is not less than 80%.

Further, the anti-interference low-voltage power cable disclosed by the utility model is characterized in that the inner sheath layer and the outer sheath layer are formed by extruding a halogen-free low-smoke flame-retardant polyolefin sheath material.

Further, the anti-interference low-voltage power cable disclosed by the utility model is characterized in that the armor protection layer adopts an aluminum alloy interlocking armor layer.

Further, the anti-interference low-voltage power cable disclosed by the utility model is characterized in that the buffer layer is formed by wrapping a longitudinally wrapped aluminum-plastic composite belt in an overlapping wrapping mode, and the wrapping coverage rate of each layer is more than or equal to 20%.

The low-voltage power cable with the anti-interference function is reasonable in overall structure arrangement, adopts copper conductors and aluminum conductors as different insulated wire core conductors, can effectively reduce manufacturing cost, can increase the anti-interference capability of the cable through the arranged multilayer shielding layers and armor protection layers, and can ensure excellent flame retardance and fireproof performance through the arranged filling layers, fireproof layers and sheath layers.

Drawings

The utility model is described in further detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of the present utility model.

The figure shows: the cable comprises a 1-cable core, a 11-main wire insulation core, a 111-copper conductor, a 112-main wire inner insulation layer, a 113-main wire inner shielding layer, a 12-ground wire insulation core, a 121-aluminum conductor, a 122-ground wire inner insulation layer, a 123-ground wire inner shielding layer, a 13-tensile reinforcement, a 2-filling layer, a 3-insulation layer, a 4-fireproof layer, a 5-isolation layer, a 6-shielding layer, a 7-inner sheath layer, an 8-armor protection layer, a 9-buffer layer and a 10-outer sheath layer.

Detailed Description

As shown in fig. 1, the anti-interference low-voltage power cable of the utility model comprises a cable core 1, wherein the cable core 1 comprises three main wire insulation wire cores 11, three ground wire insulation wire cores 12 and four tensile reinforcement pieces 13, the three main wire insulation wire cores 11 are mutually contacted to form a regular triangle structure, one ground wire insulation wire core 12 is arranged in an edge gap between every two adjacent main wire insulation wire cores 11, one tensile reinforcement piece 13 is respectively arranged at an edge gap between each adjacent main wire insulation wire core 11 and each ground wire insulation wire core 12 and an edge gap between the three main wire insulation wire cores 11, an insulation layer 3, a fireproof layer 4, an isolation layer 5, a shielding layer 6, an inner sheath layer 7, an armor protection layer 8, a buffer layer 9 and an outer sheath layer 10 are sequentially coated on the periphery of the cable core 1 from inside to outside, and a filling layer 2 is filled between the main wire insulation wire cores 11, the ground wire insulation wire cores 12 and the tensile reinforcement pieces 13 of the cable core 1.

Further, the anti-interference low voltage power cable of the present utility model, wherein the main wire insulation core 11 includes a copper conductor 111 and a main wire inner insulation layer 112 extruded outside the copper conductor 111, and a main wire inner shielding layer 113 is disposed outside the main wire inner insulation layer 112, wherein the copper conductor 111 is formed by twisting a plurality of 5 th or 6 th soft copper conductors or tin-plated copper conductors specified in GB/T3956-2008; the ground wire insulating wire core 12 comprises an aluminum conductor 121 and a ground wire inner insulating layer 122 extruded outside the aluminum conductor 121, and a ground wire inner shielding layer 123 is arranged outside the ground wire inner insulating layer 122, wherein the aluminum conductor 121 adopts a plurality of aluminum conductors or aluminum alloy conductors formed by 2 nd hinge specified by GB/T3956-2008, and the section is circular or sector-shaped; the main line inner insulating layer 112 and the ground wire inner insulating layer 122 are both formed by extrusion of crosslinked polyethylene or polyolefin insulating materials, and the main line inner shielding layer 113 and the ground wire inner shielding layer 123 are both formed by braiding annealed copper wires to form a copper mesh structure, wherein the braiding density is not less than 80%; the tensile reinforcement 13 is formed by winding a plurality of aramid yarns. With the tension reinforcement 13 provided, the tensile strength of the entire cable can be improved.

Further, according to the anti-interference low-voltage power cable disclosed by the utility model, the filling layer 2 is filled in gaps among the main line insulating wire core 11, the ground wire insulating wire core 12 and the tensile reinforcement 13 which form the cable core 1 by adopting the halogen-free flame-retardant filling rope so as to ensure that the cable can keep roundness; the insulating layer 3 is formed by extruding and packing crosslinked polyethylene or polyolefin insulating materials; the fireproof layer 4 is formed by extruding and packing a poly-perfluoroethylene propylene flame-retardant material; the isolation layer 5 is formed by wrapping three layers of polyester tapes in a positive and negative way, and the wrapping overlapping rate is not lower than 50%; the shielding layer 6 is woven by annealed copper wires to form a copper mesh belt structure, and the weaving density is not less than 80%; the inner sheath layer 7 and the outer sheath layer 10 are formed by extruding polyethylene sheath materials; the armor protection layer 8 adopts an aluminum alloy interlocking armor layer; the buffer layer 9 is formed by wrapping a longitudinal wrapping aluminum-plastic composite belt in an overlapping wrapping mode, and the wrapping coverage rate of each layer is more than or equal to 20%.

The aluminum conductor 121 adopts a plurality of aluminum conductors or aluminum alloy conductors formed by hinging the 2 nd type specified by GB/T3956-2008, the section is round or sector-shaped, the aluminum conductors or aluminum alloy conductors formed by hinging the 2 nd type are adopted, the twisting mode is round conductors in the middle, the outer layer is trapezoid conductors, the twisting can be carried out in a very round way without compacting operation, the twisting is compact, the filling coefficient can reach 95%, the outer diameter is smaller than that of the compacting type under the condition of the same current carrying capacity, insulating materials can be saved, and the manufacturing cost can be reduced. Meanwhile, as no compression is needed, direct twisting is adopted, the phenomenon of burrs is avoided, and the breakdown problem caused by the burrs of the conductor is avoided, so that the safety of the cable can be improved, the problem of compression broken wire in the direct twisting process is avoided, and the problem of waste caused by failure in repairing is avoided.

The anti-interference low-voltage power cable disclosed by the utility model is adopted, as the cable core 1 is composed of three main line insulating wire cores 11, three ground line insulating wire cores 12 and four tensile reinforcement pieces 13, wherein the main line insulating wire cores 11 adopt copper conductors 111 as conductors, the ground line insulating wire cores 12 adopt aluminum conductors 121 as conductors, so that the use requirements of the existing three-phase five-wire system power distribution system can be met, the manufacturing cost can be greatly reduced, and the tensile strength of the whole cable can be improved by utilizing the tensile reinforcement pieces 13; in addition, the filling layer 2 adopts a halogen-free flame-retardant filling rope, so that the cable is ensured to have excellent flame retardance and fireproof performance; the main line inner insulating layer 112, the ground wire inner insulating layer 122 and the insulating layer 3 are all formed by extrusion of crosslinked polyethylene or polyolefin insulating materials, so that the cable has excellent insulating performance; the fireproof layer 4 is formed by extruding a poly (perfluoroethylene propylene) flame-retardant material, so that the cable is ensured to have excellent flame retardance and fireproof performance; the isolation layer 5 is formed by wrapping three layers of polyester tapes in a positive and negative way, so that the shielding effect of the cable can be effectively improved; meanwhile, the main line inner shielding layer 113, the ground wire inner shielding layer 123 and the shielding layer 6 are all woven by annealed copper wires to form a copper mesh belt structure, so that the shielding effect of the cable can be further improved; the inner sheath layer 7 and the outer sheath layer 10 are formed by extrusion of halogen-free low-smoke flame-retardant polyolefin sheath materials, so that the halogen-free low-smoke flame-retardant cable has excellent halogen-free low-smoke flame-retardant performance, and the flame retardant grade of the whole cable meets the A-class requirement in the national standard GB/T19666-2019; the armor protection layer 8 adopts an aluminum alloy interlocking armor layer, and the aluminum alloy interlocking armor layer can be used for improving the anti-interference capability of the cable; the buffer layer 9 is formed by wrapping a longitudinal wrapping aluminum-plastic composite belt in an overlapping wrapping mode, so that the cracking problem of the outer sheath layer 10 can be effectively prevented, and a good protection effect can be achieved.

In summary, the low-voltage power cable disclosed by the utility model has the advantages that the whole structure is reasonable, the copper conductor 111 and the aluminum conductor 121 are adopted as conductors of different insulating wire cores, the manufacturing cost can be effectively reduced, the anti-interference capability of the cable can be increased through the arranged multilayer shielding layer and the armor protection layer 8, the cable can be ensured to have excellent flame retardance and fireproof performance through the arranged filling layer, the fireproof layer and the sheath layer, the manufacturing cost is low, the anti-interference capability is high, the tensile strength is high, the flame retardance and fireproof grade of the cable can be greatly improved, the whole structure is simple, the safety and reliability are high, the performance is stable, and the practicability is high, and the cable is suitable for popularization and application.

The protection scope of the present utility model is not limited to the technical solutions disclosed in the specific embodiments, but the above description is only a preferred embodiment of the present utility model, and is not limited to the present utility model, and any minor modifications, equivalent substitutions and improvements made according to the technical solutions of the present utility model should be included in the protection scope of the technical solutions of the present utility model.

Claims (10)

1. The utility model provides an anti-interference low voltage power cable, is including cable core (1), its characterized in that: the cable core (1) comprises three main line insulating wire cores (11), three ground wire insulating wire cores (12) and four tensile reinforcement pieces (13), wherein the three main line insulating wire cores (11) are mutually contacted to form a regular triangle structure, a ground wire insulating wire core (12) is arranged in an edge gap between every two adjacent main line insulating wire cores (11), a tensile reinforcement piece (13) is respectively arranged at the edge gap between each adjacent main line insulating wire core (11) and each ground wire insulating wire core (12) and the edge gap between the three main line insulating wire cores (11), an insulating layer (3), a fireproof layer (4), an isolating layer (5), a shielding layer (6), an inner sheath layer (7), an armor protective layer (8), a buffer layer (9) and an outer sheath layer (10) are sequentially coated on the periphery of the cable core (1) from inside to outside, and a filling layer (2) is filled between the insulating wire cores (11), the ground wire insulating wire cores (12) and the tensile reinforcement pieces (13) of the cable core (1).

2. An anti-interference low voltage power cable according to claim 1, wherein: the main line insulating wire core (11) comprises a copper conductor (111) and a main line inner insulating layer (112) extruded outside the copper conductor (111), and a main line inner shielding layer (113) is arranged outside the main line inner insulating layer (112), wherein the copper conductor (111) is formed by twisting a plurality of 5 th or 6 th soft copper conductors specified by GB/T3956-2008; the ground wire insulation wire core (12) comprises an aluminum conductor (121) and a ground wire inner insulation layer (122) extruded outside the aluminum conductor (121), and a ground wire inner shielding layer (123) is arranged outside the ground wire inner insulation layer (122), wherein the aluminum conductor (121) adopts a plurality of aluminum conductors or aluminum alloy conductors which are formed by 2 nd hinge and prescribed by GB/T3956-2008, and the section of the aluminum conductor is circular or sector-shaped; the main line inner insulating layer (112) and the ground wire inner insulating layer (122) are formed by extruding and packaging crosslinked polyethylene, and the main line inner shielding layer (113) and the ground wire inner shielding layer (123) are formed by weaving annealed copper wires into a copper mesh structure, wherein the weaving density of the copper mesh structure is not less than 80%; the tensile reinforcement (13) is formed by winding a plurality of aramid yarns.

3. An anti-interference low voltage power cable according to claim 1, wherein: the filling layer (2) is filled in gaps among the main line insulating wire core (11), the ground wire insulating wire core (12) and the tensile reinforcement (13) which form the cable core (1) by adopting a halogen-free flame-retardant filling rope, so that the cable can keep roundness.

4. An anti-interference low voltage power cable according to claim 1, wherein: the insulating layer (3) is formed by extruding and packing crosslinked polyethylene.

5. An anti-interference low voltage power cable according to claim 1, wherein: the fireproof layer (4) is formed by extruding and packing a poly-perfluoroethylene propylene flame-retardant material.

6. An anti-interference low voltage power cable according to claim 1, wherein: the isolation layer (5) is formed by wrapping three layers of polyester tapes in a positive and negative mode, and the wrapping overlapping rate is not lower than 50%.

7. An anti-interference low voltage power cable according to claim 1, wherein: the shielding layer (6) is of a copper mesh belt structure formed by weaving annealed copper wires, and the weaving density of the shielding layer is not less than 80%.

8. An anti-interference low voltage power cable according to claim 1, wherein: the inner sheath layer (7) and the outer sheath layer (10) are formed by extrusion of halogen-free low-smoke flame-retardant polyolefin sheath materials.

9. An anti-interference low voltage power cable according to claim 1, wherein: the armor protection layer (8) adopts an aluminum alloy interlocking armor layer.

10. An anti-interference low voltage power cable according to claim 1, wherein: the buffer layer (9) is formed by wrapping a longitudinal wrapping aluminum-plastic composite belt in an overlapping wrapping mode, and the wrapping coverage rate of each layer is more than or equal to 20%.

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