High-strength high-voltage twisted pair for automobile

Abstract

The utility model discloses a high-strength high-voltage twisted pair for an automobile, which relates to the technical field of cables and comprises a twisted wire body, a shielding layer and a sheath layer, the twisted wire body is formed by twisting two single wires in pairs, the shielding layer is sleeved outside the twisted wire body, and the sheath layer is sleeved outside the shielding layer; each single wire comprises a conductor layer and an insulating layer, the conductor layer is formed by twisting a plurality of copper wires, the conductor layer is sleeved with the insulating layer, and the insulating layer is a composite material layer; according to the utility model, the insulating layer is made of the nano montmorillonite (MMT) / POE / PP composite material, so that the mechanical property of the cable insulating material is enhanced and the strength of the insulating layer is enhanced while the high temperature resistance is maintained, and the low stranding pitch can be achieved; for a twisted wire, the anti-interference capability is stronger when the twist pitch is lower, and a twisted pair made of common materials in the market is cracked if the twist pitch is too low. Meanwhile, due to the high mechanical performance of the cable, the laying scene of the wire is widened, and the service life of the cable is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a high-strength high-voltage twisted pair wire for automobiles. Background Art

[0002] The insulation layer of the single-wire outer layer of the existing automotive twisted pair cables is usually made of polyvinyl chloride (PVC) or cross-linked polyethylene (XLPE). However, the dielectric properties of PVC insulated cables are poor. On the one hand, it is difficult to withstand high voltages during use; on the other hand, PVC insulated cables have large dielectric losses during use, which will reduce transmission efficiency; and when used in automobiles, due to the high ambient temperature, it is easy to cause material aging, thereby reducing its service life and affecting the normal use of the vehicle.

[0003] Compared with PVC insulated cables, XLPE insulated cables have better dielectric and mechanical properties, but their production costs are high; and because XLPE is a thermosetting cross-linked material, its environmental friendliness is poor.

[0004] Polypropylene insulated cables are easy to process and have low production costs. They also have good pressure resistance. However, pure polypropylene insulated cables have poor mechanical properties and are prone to cracking when used in twisted pair cables. In general, blended and modified polypropylene insulated cables have large dielectric losses during transmission and insufficient pressure resistance. To this end, we provide a high-strength high-voltage twisted pair cable for automobiles. Utility Model Content

[0005] The technical problem solved by the utility model is that the existing polypropylene insulated cables are easy to process and have low production costs and good pressure resistance performance, but the pure polypropylene insulated cables have poor mechanical properties and are prone to cracking when used for twisted pair cables, and the general blended modified polypropylene insulated cables have large dielectric losses during transmission and insufficient pressure resistance.

[0006] The utility model can be implemented by the following technical scheme: a high-strength high-voltage twisted pair wire for automobiles, comprising a twisted wire body, a shielding layer, and a sheath layer, wherein the twisted wire body is formed by twisting two single wires, the shielding layer is sleeved outside the twisted wire body, and the sheath layer is sleeved outside the shielding layer;

[0007] The single wire comprises: a conductor layer and an insulating layer, wherein the conductor layer is formed by twisting a plurality of copper wires, the insulating layer is sleeved outside the conductor layer, and the insulating layer is a composite material layer.

[0008] A further technical improvement of the utility model is that the insulating layer is composed of a composite material layer of nano-MMT, polyolefin elastomer (POE) and polypropylene (PP).

[0009] A further technical improvement of the utility model is that the pitch between the twisted wires of the two single wires is 10cm-15cm.

[0010] A further technical improvement of the utility model is that the conductor layer is composed of annealed bare copper soft conductor.

[0011] A further technical improvement of the utility model is that the shielding layer is composed of an aluminum-plastic composite film.

[0012] A further technical improvement of the utility model is that the sheath layer is made of polyurethane material (TPU).

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The insulation layer of this cable adopts nano-montmorillonite (MMT) / POE / PP composite material, which enhances the mechanical properties of the cable insulation material while maintaining high temperature resistance, and enhances the strength of the insulation layer, so that it can achieve a low lay length; for twisted wires, the lower the lay length, the stronger the anti-interference ability, while the twisted pair wires of ordinary materials on the market will crack if the lay length is too low; at the same time, the high mechanical properties of the cable also broaden the laying scenarios of the wires and increase the service life of the cables. On the other hand, compared with general modified polypropylene insulated cables, the cable has excellent dielectric properties. While maintaining the voltage resistance of the cable, it also enables the cable to have lower dielectric loss during use, increases the transmission performance of the cable, and can effectively solve the problems in the background technology; and the insulating material and the sheath material are both environmentally friendly materials, making the cable environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] In the figure: 1, stranded wire body; 101, single wire; 1011, conductor layer; 1012, insulation layer; 3, shielding layer; 4, sheath layer. DETAILED DESCRIPTION

[0018] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0019] See also Figure 1 As shown, the utility model proposes a high-strength high-voltage twisted pair cable for automobiles; it includes a twisted wire body 1, a shielding layer 3, and a sheath layer 4. The twisted wire body 1 is formed by twisting two single wires 101, the shielding layer 3 is sleeved outside the twisted wire body 1, and the sheath layer 4 is sleeved outside the shielding layer 3;

[0020] The single wire 101 includes: a conductor layer 1011 and an insulating layer 1012 . The conductor layer 1011 is formed by twisting a plurality of copper wires. The insulating layer 1012 is sleeved outside the conductor layer 1011 . The insulating layer 1012 is a composite material layer.

[0021] The insulating layer 1012 is composed of a composite material layer of nano-MMT, polyolefin elastomer (POE), and polypropylene (PP); the material can be found in "The influence of the phase dispersion of nano-particles in the montmorillonite-elastomer / polypropylene composite system on the crystal morphology and dielectric properties", and the composite material layer is made of 80phrPP, 20phrPOE, and 0.5phrMMT; the insulating layer 1012 uses a nano-MMT / POE / PP composite material with good dielectric properties. When used in automobiles, it can withstand higher voltages on the one hand; on the other hand, the relative dielectric constant and loss tangent of the material are both small, which reduces the loss during data transmission. The addition of the elastomer enhances the mechanical properties of the insulating material, and can make the wire have a low twist length without cracking, thereby reducing electromagnetic losses.

[0022] The pitch between the twisted wires of the two single wires 101 is 10cm-15cm; the insulating layer 1012 adopts nano-montmorillonite (MMT) / POE / PP composite material, which enhances the strength of the insulating layer 1012 so that it can have a low lay length; for twisted wires, the lower the lay length, the stronger the anti-interference ability, while the twisted pair wires made of ordinary materials on the market will crack if the lay length is too low.

[0023] The conductor layer 1011 is composed of annealed bare copper soft conductor to carry out the electrical conduction process of the cable.

[0024] The shielding layer 3 is composed of an aluminum-plastic composite film; the shielding layer 3 can shield external interference and control the twisting pitch of the stranded wire from deteriorating due to bending during subsequent processing and use, thereby avoiding interference loss during signal transmission and enhancing the transmission capacity of the cable.

[0025] The sheath layer 4 is made of polyurethane material (TPU); by providing the sheath layer 4, the sheath layer 4 of the polyurethane material (TPU) has excellent high wear resistance, high tension, high tensile force, strong toughness and aging resistance, and is a mature environmentally friendly material, which effectively improves the strength of the wire and increases the service life of the wire.

[0026] The insulating layer 1012 adopts nano-montmorillonite (MMT) / POE / PP composite material, which enhances the mechanical properties of the cable insulation material while maintaining high temperature resistance, and enhances the strength of the insulating layer 1012, so that it can achieve a low lay length; for twisted wires, the lower the lay length, the stronger the anti-interference ability, while the twisted pair wires of ordinary materials on the market will crack if the lay length is too low; at the same time, the high mechanical properties of the cable also broaden the laying scenarios of the wires and increase the service life of the cables. On the other hand, compared with general modified polypropylene insulated cables, the cable has excellent dielectric properties. While maintaining the voltage resistance of the cable, it also enables the cable to have lower dielectric loss during use, increases the transmission performance of the cable, and can effectively solve the problems in the background technology; and the insulating material and the sheath material are both environmentally friendly materials, making the cable environmentally friendly.

[0027] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A high-strength high-voltage twisted pair cable for automobiles, characterized in that: The invention comprises a twisted wire body (1), a shielding layer (3) and a sheath layer (4), wherein the twisted wire body (1) is formed by twisting two single wires (101), the shielding layer (3) is sleeved outside the twisted wire body (1), and the sheath layer (4) is sleeved outside the shielding layer (3); The single wire (101) comprises: a conductor layer (1011) and an insulating layer (1012); the conductor layer (1011) is formed by twisting a plurality of copper wires; the insulating layer (1012) is sleeved outside the conductor layer (1011); and the insulating layer (1012) is a composite material layer.

2. A high-strength high-voltage twisted pair cable for automobiles according to claim 1, characterized in that: The insulating layer (1012) is composed of a composite material layer of nano MMT, polyolefin elastomer POE and polypropylene PP.

3. A high-strength high-voltage twisted pair cable for automobiles according to claim 1, characterized in that: The pitch between the twisted wires of the two single wires (101) is 10cm-15cm.

4. A high-strength high-voltage twisted pair cable for automobiles according to claim 1, characterized in that: The conductor layer (1011) is composed of annealed bare copper soft conductor.

5. The high-strength high-voltage twisted pair cable for automobiles according to claim 1, characterized in that: The shielding layer (3) is composed of an aluminum-plastic composite film.

6. A high-strength high-voltage twisted pair cable for automobiles according to claim 1, characterized in that: The sheath layer (4) is made of polyurethane material TPU.

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