Tensile folding-resistant cable for charging pile

Abstract

The invention discloses a tensile folding-resistant cable for a charging pile, and the cable comprises conductive inner cores, a plurality of conductive inner cores form a circular whole, and the circular whole is distributed in the center of the cable in a rectangular manner; the plurality of conductive inner cores are provided with a filling layer in the circular whole, an SMC yarn layer is arranged outside the circular whole, and an insulating protective layer is arranged between the SMC yarn layer and the circular whole; the SMC yarn layer is of a rectangular structure, and the four vertexes of the rectangle make contact with the inner wall of the shielding layer. An elastomer layer is arranged between the SMC yarn layer and the shielding layer; the shielding layer is arranged outside the elastomer layer, the gap protection layer is arranged outside the shielding layer, and the outer protection layer is arranged outside the gap protection layer. The SMC yarn layer enables the cable to have high tensile strength and bending resistance, and the tensile strength of the whole cable can be enhanced by arranging the conductive inner cores in the SMC yarn layer.

Description

Technical Field

[0001] The invention belongs to the field of cable preparation, in particular to a tensile and folding-resistant cable for a charging pile. Background Art

[0002] With the development of new energy vehicles, especially electric vehicles, charging outside and the related supporting facilities of charging piles have become one of the technologies to be solved.

[0003] Among them, the cables of charging piles are often overlooked by others. People think that these are unimportant and marginalized technical points. However, for technicians in this field, it is a big problem. In the past, cables were buried underground or erected in the air, but charging pile cables are different from the above cables. They need to be pulled and folded frequently, so tensile and fold-resistant cables came into being. Summary of the invention

[0004] In order to overcome the deficiencies in the above-mentioned prior art, the present invention provides a tensile and folding-resistant cable for a charging pile.

[0005] The technical solution of the present invention is as follows: A tensile and folding-resistant cable for a charging pile, comprising a conductive inner core, characterized in that a plurality of conductive inner cores form a circular whole, and the circular whole is distributed in a rectangular shape at the center of the cable; The plurality of conductive inner cores are provided with a filling layer in the circular body, the outside of the circular body is an SMC yarn layer, and an insulating protective layer is provided between the SMC yarn layer and the circular body; The SMC yarn layer is in a rectangular structure, and the four vertices of the rectangle are in contact with the inner wall of the shielding layer; an elastomer layer is between the SMC yarn layer and the shielding layer; the shielding layer is outside the elastomer layer, the gap protection layer is outside the shielding layer, and the outer protective layer is outside the gap protection layer.

[0006] The elastomer layer is prepared from the following components in parts by mass: Polypropylene: 20~30 parts; Polyethylene: 20-30 parts; Polyvinyl chloride: 20-30 parts; EPDM: 60~80 parts; Nitrile rubber NBR: 30~40 parts; Polyurethane: 10-15 parts; Additives: 2~3 parts; Cross-linking agent: 1~2 parts.

[0007] Furthermore, a plurality of gap holes are arranged in the gap protection layer, and the shape of the holes is rectangular, circular or elliptical.

[0008] Furthermore, the outer sheath surface is provided with a plurality of irregular smooth convex points, which can increase the friction force on the cable surface and enhance the beauty of the overall cable structure.

[0009] Furthermore, the outer protective layer>gap protection layer>shielding layer.

[0010] Furthermore, the circular bodies are divided into four groups.

[0011] Furthermore, the rectangular vertices of the SMC yarn layer may also be embedded in the inner wall of the shielding layer, and the rectangular vertices of the SMC yarn layer do not pass through the outer wall of the shielding layer.

[0012] Furthermore, the auxiliary agent is high molecular weight polysiloxane.

[0013] Furthermore, the crosslinking agent is a calcium-zinc composite stabilizer.

[0014] Further, the SMC yarn layer is prepared from the following components in parts by mass: Glass fiber: 40~50 parts; Phthalic acid type unsaturated resin: 20-30 parts; Halogenated unsaturated polyester resin: 20-30 parts; Thickener: 3~5 parts; Initiator: 10~12 parts.

[0015] Furthermore, the thickener is active magnesium oxide.

[0016] The beneficial effects of the present invention compared with the prior art are: The present invention uses polyolefin materials (polypropylene (PP) and polyethylene (PE)) in combination with EPDM and NBR to prepare cable materials with characteristics such as softness, low temperature resistance, and high temperature resistance. The present invention also uses polyvinyl chloride and polyurethane to form a composite polyurethane elastomer material as the elastomer layer inside the cable of the present invention to ensure the cable's super wear resistance, high tear resistance, and weather resistance, while further improving the cable's softness to prepare a tensile and folding-resistant cable for easy use in charging piles.

[0017] Secondly, the SMC yarn layer in the present invention enables the present invention to have strong tensile strength and bending resistance. At the same time, placing several groups of conductive inner cores inside the SMC yarn layer can also enhance the overall tensile strength of the cable. The present invention also provides an elastomer layer to further improve the tensile strength. During the pulling process of the charging pile cable, the elastomer layer protects the internal structure of the cable. In addition, the gap protection layer also improves the tensile strength, making the cable of the present invention more widely used. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic cross-sectional view of a tensile and folding-resistant cable for a charging pile according to the present invention.

[0019] Among them, 1-conductive inner core, 2-filling layer, 3-insulating protective layer, 4-SMC yarn layer, 5-elastomeric layer, 6-shielding layer, 7-gap protective layer, 8-outer protective layer, and 9-circular whole. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail by enumerating examples below. It should be noted that the specific implementation described here is only used to explain the present invention and is not used to limit the present invention.

[0021] like Figure 1 As shown, the tensile and folding-resistant cable for the charging pile of the present invention comprises a conductive inner core 1, characterized in that a plurality of conductive inner cores 1 form a circular whole 9, and the circular whole 9 is distributed in the center of the cable in a rectangular shape; the plurality of conductive inner cores 1 are provided with a filling layer 2 in the circular whole 9, and the SMC yarn layer 4 is provided outside the circular whole 9, and the insulating protective layer 3 is provided between the SMC yarn layer 4 and the circular whole 9; the SMC yarn layer 4 is in a rectangular structure, and the four vertices of the rectangle are in contact with the inner wall of the shielding layer 6; the elastomer layer 5 is provided between the SMC yarn layer 4 and the shielding layer 6; the shielding layer 6 is provided outside the elastomer layer 5, the gap protective layer 7 is provided outside the shielding layer 6, and the outer protective layer 8 is provided outside the gap protective layer 7. The outer protective layer 8> the gap protective layer 7> the shielding layer 6.

[0022] A plurality of small gap holes are arranged in the gap protection layer 7, and the shape of the holes is rectangular, circular or elliptical. A plurality of irregular smooth convex points are arranged on the surface of the outer protective layer 8. The smooth convex points can increase the friction force on the cable surface and increase the beauty of the overall structure of the cable. The rectangular vertices of the SMC yarn layer 4 can also be embedded in the inner wall of the shielding layer 6, and the rectangular vertices of the SMC yarn layer 4 do not pass through the outer wall of the shielding layer 6. Example

[0023] In this embodiment, the elastomer layer 5 is prepared from the following components by weight: polypropylene: 30 parts; polyethylene: 30 parts; polyvinyl chloride: 30 parts; EPDM: 80 parts; NBR: 40 parts; polyurethane: 15 parts; additive: 3 parts; crosslinking agent: 2 parts. The SMC yarn layer 4 is prepared from the following components: glass fiber: 40-50 parts; phthalic acid type unsaturated resin: 30 parts; halogenated unsaturated polyester resin: 30 parts; thickener: 5 parts; initiator: 12 parts. Example

[0024] In this embodiment, the elastomer layer 5 is prepared from the following components by weight: polypropylene: 20 parts; polyethylene: 20 parts; polyvinyl chloride: 20 parts; EPDM: 60 parts; NBR: 30 parts; polyurethane: 10 parts; additive: 2 parts; crosslinking agent: 1 part. The SMC yarn layer 4 is prepared from the following components: glass fiber: 40 parts; phthalic acid type unsaturated resin: 20 parts; halogenated unsaturated polyester resin: 20 parts; thickener: 3 parts; initiator: 10 parts. Example

[0025] In this embodiment, the elastomer layer 5 is prepared from the following components by weight: polypropylene: 28 parts; polyethylene: 28 parts; polyvinyl chloride: 25 parts; EPDM: 70 parts; NBR: 36 parts; polyurethane: 14 parts; additive: 2 parts; crosslinking agent: 2 parts. The SMC yarn layer 4 is prepared from the following components: glass fiber: 46 parts; phthalic acid type unsaturated resin: 27 parts; halogenated unsaturated polyester resin: 25 parts; thickener: 4 parts; initiator: 10 parts.

[0026] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A tensile and folding-resistant cable for a charging pile, comprising a conductive inner core (1), characterized in that: A plurality of conductive inner cores (1) form a circular whole (9), and the circular whole (9) is distributed in the center of the cable in a rectangular shape; The plurality of conductive inner cores (1) are provided with a filling layer (2) in the circular body (9); the outside of the circular body (9) is provided with an SMC yarn layer (4); and between the SMC yarn layer (4) and the circular body (9) is an insulating protective layer (3); The SMC yarn layer (4) is in a rectangular structure, and the four vertices of the rectangle are in contact with the inner wall of the shielding layer (6); an elastomer layer (5) is provided between the SMC yarn layer (4) and the shielding layer (6); the shielding layer (6) is provided outside the elastomer layer (5), the gap protection layer (7) is provided outside the shielding layer (6), and the outer protective layer (8) is provided outside the gap protection layer (7); The elastomer layer (5) is prepared from the following components in parts by mass: Polypropylene: 20~30 parts; Polyethylene: 20-30 parts; Polyvinyl chloride: 20-30 parts; EPDM: 60~80 parts; Nitrile rubber NBR: 30~40 parts; Polyurethane: 10-15 parts; Additives: 2~3 parts; Cross-linking agent: 1~2 parts.

2. The tensile and folding-resistant cable for a charging pile according to claim 1, characterized in that: A plurality of small gap holes are arranged in the gap protection layer (7), and the shape of the holes is rectangular, circular or elliptical.

3. The tensile and folding-resistant cable for a charging pile according to claim 1, characterized in that: The surface of the outer protective layer (8) is provided with a plurality of irregular smooth protrusions.

4. The tensile and folding-resistant cable for a charging pile according to claim 1, characterized in that: In terms of thickness, the outer protective layer (8)>gap protection layer (7)>shielding layer (6).

5. The tensile and folding-resistant cable for a charging pile according to claim 1, characterized in that: According to thickness, the circular bodies (9) are divided into four groups.

6. The tensile and folding-resistant cable for a charging pile according to claim 1, characterized in that: According to the thickness, the rectangular vertices of the SMC yarn layer (4) can also be embedded in the inner wall of the shielding layer (6), and the rectangular vertices of the SMC yarn layer (4) do not pass through the outer wall of the shielding layer (6).

7. The tensile and folding-resistant cable for a charging pile according to claim 1, characterized in that: The auxiliary agent is high molecular weight polysiloxane.

8. The tensile and folding-resistant cable for a charging pile according to claim 1, characterized in that: The crosslinking agent is a calcium-zinc composite stabilizer.

9. The tensile and folding-resistant cable for a charging pile according to claim 1, characterized in that: The SMC yarn layer (4) is prepared from the following components in parts by mass: Glass fiber: 40~50 parts; Phthalic acid type unsaturated resin: 20-30 parts; Halogenated unsaturated polyester resin: 20-30 parts; Thickener: 3~5 parts; Initiator: 10~12 parts.

10. The tensile and folding-resistant cable for a charging pile according to claim 9, characterized in that: The thickener is active magnesium oxide.

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