Reinforced cable special for direct current charging pile

Abstract

The utility model discloses a special cable for a reinforced direct current charging pile in the field of cables, which comprises an outer sheath and a plurality of cable cores, each cable core is arranged in the outer sheath, each cable core comprises two cable cores I which correspond to each other left and right, two cable cores II and two cable cores III are respectively arranged on the front and rear sides of the two cable cores I, and the cable cores II and the cable cores III are arranged in the outer sheath. A fourth wire core is arranged between the two second wire cores, a fifth wire core is arranged between the two third wire cores, and the second wire cores, the third wire cores and the fourth wire core are all provided with reinforcing layers. According to the utility model, by adopting a newly designed reinforced protection structure and technology of the small-specification core wire in the charging pile cable, various harsh use environments of the charging pile cable in a public parking area can be satisfied, and the service life and the safety of the charging pile connecting cable are greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of cables, and specifically relates to a reinforced DC charging pile special cable. Background Technology

[0002] In existing technologies, DC charging piles are generally installed in outdoor public parking areas. The connecting cables of DC charging piles are used frequently and are subjected to external forces such as dragging, twisting, abrasion, and impact. Within their expected lifespan, they often experience sheath damage and internal core wire short circuits, directly posing safety hazards during electric vehicle charging and rendering the charging pile connecting cables unusable or even unusable. Currently, there is an urgent need for a cable that can protect the internal core wires. Utility Model Content

[0003] The purpose of this utility model is to provide a reinforced DC charging pile cable. By adopting a newly designed reinforced protection structure and process for the small-diameter core wires inside the charging pile cable, it can meet the various harsh operating environments of charging pile cables in public parking areas, and significantly improve the service life and safety of the charging pile connection cable.

[0004] The purpose of this utility model is achieved as follows: A reinforced DC charging pile special cable includes an outer sheath and several cores. Each core is set inside the outer sheath. Each core includes two corresponding cores 1. Two cores 2 and two cores 3 are respectively set on the front and rear sides of the two cores 1. A core 4 is set between the two cores 2. A core 5 is set between the two cores 3. A reinforcing layer is set on the cores 2, 3, and 4.

[0005] Compared with existing technologies, the beneficial effects of this utility model are as follows: by using a reinforcing layer around the small-diameter core wires inside the charging pile cable as a reinforced protective structure, the service life and safety of the charging pile connection cable are improved. This utility model adopts a small-diameter core wire protection structure design, a cabling structure design, an outer sheath elastomer material selection technology, and a torsion and bending resistance verification technology. 1. Core wire protection structure design: In order to effectively improve the protection level of the small-diameter core wires, a reinforcing layer (using high-strength fiber rope, braiding density ≥90%) is braided outside the auxiliary power core and the grounding core. For signal line units with braided shielding, a reinforcing layer is braided outside the braided shielding layer; for those without shielding, a layer is braided outside the non-woven fabric. 2. Cabling structure design: To improve the flexibility of the charging pile cable, the cable core adopts an optimized cabling structure to meet the connection sequence requirements with the charging gun; considering the normal operation of the cable in a long-term harsh environment, to ensure the structural stability of the insulated core, high-strength non-metallic reinforcing elements are selected as fillers in the gaps in the cable structure. 3. Selection of Outer Sheath Elastomer Material: To ensure the cable can withstand external forces such as dragging, twisting, abrasion, and impact during normal use, a high-strength, high-flexibility thermoplastic elastomer material is selected. The material's tensile strength is not less than 20.0 MPa, elongation at break is not less than 400%, and high-temperature pressure index is less than 5%. The outer sheath can also meet the harsh operating environments of humidity, salt spray, high temperature, acid and alkali, low temperature, and oil resistance. 4. Torsion and Bending Resistance Verification Technology: Firstly, torsion resistance verification: The cable should withstand no less than 300,000 cycles of 360° torsion testing without current interruption or short circuit between conductors, while the insulation and sheath should show no visible cracking. Secondly, bending resistance verification: The cable should withstand 300,000 bidirectional bending tests at ±90° 60 times / second without current interruption or short circuit between conductors, while the insulation and sheath should show no visible cracking.

[0006] As a further improvement of this utility model, the second core includes two conductors with insulating layers. An aluminum-plastic tape layer is wrapped around the outer periphery of the two conductors. Asbestos is filled in the gap between the two conductors within the aluminum-plastic tape layer. A copper wire shielding layer is provided around the outer periphery of the aluminum-plastic tape layer. A reinforcing layer of the second core is fitted around the outer periphery of the copper wire shielding layer, and an inner sheath is provided around the outer periphery of the reinforcing layer of the second core. The internal reinforcing layer of the second core improves its strength.

[0007] As a further improvement of this utility model, the fourth core includes a central conductor, with six outer conductors distributed around its periphery. An insulating layer is provided around the periphery of both the central and outer conductors. Each outer conductor is wrapped with an aluminum-plastic tape layer, and a copper wire shielding layer is provided around the aluminum-plastic tape layer. A reinforcing layer of the fourth core is fitted around the copper wire shielding layer, and an inner sheath is provided around the reinforcing layer of the fourth core. The internal reinforcing layer of the fourth core improves its strength, and the fourth core contains a stable structure formed by seven conductors.

[0008] As a further improvement of this utility model, core one, core three and core five all include conductors, and an insulating layer is provided on the outer periphery of the conductors.

[0009] As a further improvement of this utility model, a reinforcing layer is provided on the outer periphery of the insulation layer of the third core wire. Since the third core wire is a small-diameter core wire, the reinforcing layer on its outer periphery improves its strength.

[0010] As a further improvement of this utility model, the reinforcing layer is made of high-strength fiber rope with a weaving density of 90% or greater. The high-strength fiber rope can be made of high-strength polyethylene fiber rope, high-strength carbon fiber rope, etc., and the weaving density of the high-strength fiber rope is less than 100%.

[0011] As a further improvement of this utility model, the outer periphery of core one, core two, core three, core four, and core five is wrapped with a wrapping tape layer, and the gaps between each core within the wrapping tape layer are filled with asbestos. An outer sheath is provided around the outer periphery of the wrapping tape layer. The asbestos fills the gaps, improving the overall strength of the cable. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the structure of two wire cores, number two and number four.

[0014] Figure 3 This is a schematic diagram of the structure of core three.

[0015] The components are: 1 conductor, 2 insulation layer, 3 aluminum-plastic tape layer, 4 copper wire shielding layer, 5 inner sheath, 6 asbestos, 7 wrapping tape layer, 8 outer sheath, 9 wire core one, 10 wire core two, 11 wire core three, 12 wire core four, 13 wire core five, 14 reinforcing layer, 15 center conductor, and 16 outer conductor. Detailed Implementation

[0016] like Figure 1-3As shown, a reinforced DC charging pile cable includes an outer sheath 8 and several cores. Each core is located inside the outer sheath 8. Each core includes two corresponding cores 9. Two cores 10 and two cores 3 11 are respectively arranged on the front and rear sides of the two cores 9. A core 4 12 is arranged between the two cores 2 10. A core 5 13 is arranged between the two cores 3 11. A reinforcing layer 14 is provided on each of the cores 2 10, cores 3 11, and cores 4 12.

[0017] Core 2 10 includes two conductors 1 with insulation layers 2. An aluminum-plastic tape layer 3 is wrapped around the two conductors 1. Asbestos 6 is filled in the gap between the two conductors 1 within the aluminum-plastic tape layer 3. A copper wire shielding layer 4 is provided around the aluminum-plastic tape layer 3. A reinforcing layer 14 of core 2 10 is fitted around the copper wire shielding layer 4. An inner sheath 5 is provided around the reinforcing layer 14 of core 2 10. The reinforcing layer 14 inside core 2 10 increases its strength. Core 4 12 includes a center conductor 15. Six outer conductors 16 are distributed around the center conductor 15. Insulation layers 2 are provided around the center conductor 15 and the outer conductors 16. An aluminum-plastic tape layer 3 is wrapped around the outer periphery of each outer conductor 16. A copper wire shielding layer 4 is provided around the aluminum-plastic tape layer 3. A reinforcing layer 14 of core 4 12 is fitted around the copper wire shielding layer 4. An inner sheath 5 is provided around the reinforcing layer 14 of core 4 12. The core 12 has a reinforcing layer 14 inside to improve its strength. The core 12 contains a stable structure formed by seven conductors 1.

[0018] Core 1 (9), Core 3 (11), and Core 5 (13) all include a conductor 1, with an insulation layer 2 surrounding the conductor. Core 3 (11) has a reinforcing layer 14 surrounding its insulation layer 2. As a small-diameter core wire, Core 3 (11) benefits from the reinforcing layer 14 to improve its strength. The reinforcing layer 14 is made of high-strength fiber rope with a braiding density greater than or equal to 90%. The high-strength fiber rope can be made of high-strength polyethylene fiber rope, high-strength carbon fiber rope, etc., and its braiding density is less than 100%.

[0019] The outer periphery of conductor 9, conductor 10, conductor 31, conductor 42, and conductor 513 is wrapped with a wrapping tape layer 7. The gaps between the conductors within the wrapping tape layer 7 are filled with asbestos 6. An outer sheath 8 is provided around the outer periphery of the wrapping tape layer 7. The asbestos 6 fills the gaps, improving the overall strength of the cable.

[0020] In this utility model, core 9 is a DC power supply line, cores 10 and 12 are both signal lines, and cores 11 are an auxiliary power supply line and a grounding line, respectively.

[0021] This utility model improves the service life and safety of charging pile connection cables by adding a reinforcing layer 14 around the small-diameter core wires inside the charging pile cable as a reinforced protection structure. This utility model employs a small-diameter core wire protection structure design, a cabling structure design, an outer sheath 8 elastic material selection technology, and torsion and bending resistance verification technology. 1. Core wire protection structure design: To effectively improve the protection level of the small-diameter core wires, a reinforcing layer 14 (using high-strength fiber rope with a braiding density ≥90%) is braided outside the auxiliary power core and grounding core. For signal line units with braided shielding, a reinforcing layer 14 is braided outside the braided shielding layer; for unshielded units, a layer is braided outside the non-woven fabric. 2. Cabling structure design: To improve the flexibility of the charging pile cable, the cable core adopts an optimized cabling structure to meet the connection sequence requirements with the charging gun. Considering the cable's normal operation in a long-term, harsh environment, and to ensure the structural stability of the insulated core, high-strength non-metallic reinforcing elements are used to fill the gaps in the cable structure. 3. Outer Sheath 8 Elastomer Material Selection Technology: To ensure the cable can withstand external forces such as dragging, twisting, abrasion, and impact during normal use, a high-strength, high-flexibility thermoplastic elastomer material was selected. The material's tensile strength is not less than 20.0 MPa, elongation at break is not less than 400%, and high-temperature pressure index is less than 5%. The outer sheath 8 can also meet the harsh operating environments of humidity, salt spray, high temperature, acid and alkali, low temperature, and oil resistance. 4. Torsion and Bending Resistance Verification Technology: Firstly, torsion resistance verification: The cable should withstand no less than 300,000 cycles of 360° torsion testing without current interruption or short circuit between conductors, while the insulation and sheath should show no visible cracks. Secondly, bending resistance verification: The cable should withstand 300,000 cycles of bidirectional bending at ±90° 60 times / second without current interruption or short circuit between conductors, while the insulation and sheath should show no visible cracks.

[0022] This utility model is not limited to the above embodiments. Based on the technical solutions disclosed in this utility model, those skilled in the art can make some substitutions and modifications to some of the technical features without creative labor, and these substitutions and modifications are all within the protection scope of this utility model.

Claims

1. A reinforced direct current charging pile special cable, comprising an outer sheath and a plurality of core wires, each core wire being arranged inside the outer sheath, characterized in that, Each wire core comprises two corresponding wire cores I, two wire cores II and two wire cores III are arranged on the front and back of the two wire cores I, a wire core IV is arranged between the two wire cores II, and a wire core V is arranged between the two wire cores III, the wire cores II, III, IV are all provided with a reinforcing layer.

2. The reinforced DC charging pile special cable according to claim 1, characterized in that, The wire core II comprises two conductors with an insulation layer, an aluminum plastic tape layer is arranged outside the two conductors, and the gap between the two conductors is filled with asbestos, a copper wire shielding layer is arranged outside the aluminum plastic tape layer, the reinforcing layer of the wire core II is sleeved outside the copper wire shielding layer, and an inner sheath is arranged outside the reinforcing layer of the wire core II.

3. The reinforced DC charging pile special cable according to claim 1 or 2, characterized in that, The wire core IV comprises a center conductor, six outer conductors are distributed around the outer periphery of the center conductor, the center conductor and the outer conductors are both provided with an insulation layer, the outer periphery of each outer conductor is wrapped with an aluminum plastic tape layer, a copper wire shielding layer is arranged outside the aluminum plastic tape layer, the reinforcing layer of the wire core IV is sleeved outside the copper wire shielding layer, and an inner sheath is arranged outside the reinforcing layer of the wire core IV.

4. The reinforced DC charging pile special cable according to claim 1 or 2, characterized in that, The wire core I, the wire core III and the wire core V all comprise a conductor, and the conductor is provided with an insulation layer.

5. The reinforced DC charging pile special cable according to claim 4, characterized in that, The outer periphery of the insulation layer of the wire core III is provided with a reinforcing layer.

6. The reinforced DC charging pile special cable according to claim 1 or 2, characterized in that, The reinforcing layer is knitted by high-strength fiber ropes, and the knitting density is greater than or equal to 90%.

7. The reinforced DC charging pile special cable according to claim 1 or 2, characterized in that, The outer periphery of the wire core I, the wire core II, the wire core III, the wire core IV and the wire core V is wrapped with a wrapping tape layer, the gap between the wire cores is filled with asbestos in the wrapping tape layer, and an outer sheath is arranged outside the wrapping tape layer.

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