Lightweight fireproof flame-retardant multi-layer shielding automobile cable

Abstract

The utility model discloses a lightweight fireproof flame-retardant multi-layer shielding automobile cable, which comprises conductors (1), an insulating layer, a shielding layer and an outer sheath (8), a plurality of conductors are twisted and then extruded with the insulating layer to serve as core wires, a plurality of core wires are twisted and then extruded with the outer sheath after being wrapped with the shielding layer; each conductor is composed of a plurality of monofilaments which are twisted together, and a plurality of reinforcing rods (2) are added in the middle; the insulating layers comprise a first insulating layer (4) and a second insulating layer (6), the plurality of conductors are twisted and then wrapped by the binding tape (3), and then the first insulating layer, the first shielding layer (5) and the second insulating layer are sequentially extruded to form a core wire; a plurality of core wires are twisted and then are wrapped by a second shielding layer (7), and then are extruded by an outer sheath; the conductor is a copper-clad aluminum conductor; the reinforcing rods are made of high-strength high-modulus ultra-high molecular weight polyethylene fibers; the first shielding layer and the second shielding layer are copper-clad aluminum braid layers. According to the automobile cable, the weight of the cable can be greatly reduced, the tensile strength is increased, and the anti-interference performance of the cable is improved.

Description

Technical Field

[0001] The utility model relates to an electric wire and cable, in particular to a lightweight, fire-resistant and flame-retardant multi-layer shielded automobile cable. Background Art

[0002] The existing common multi-core shielded automotive cables only extrude an insulating layer outside the copper conductor, twist multiple insulated core wires together, weave a shielding layer outside and extrude an outer sheath. The shielding layer generally uses a copper braided layer. The main temperature resistance level of this sheathed cable is 70℃ and 105℃, which is suitable for use in an environment of -25℃ to +105℃. Although it can meet the requirements of relevant technical standards, it is not suitable for use in harsh environments. In addition, the weight of the wire is heavy. Although the weight of the automotive cable accounts for a small proportion of the weight of the entire vehicle, reducing the weight of the wire is a development trend. In addition, due to the use of a shielding layer, the existing automotive cables have relatively weak anti-interference performance. Summary of the invention

[0003] The purpose of the utility model is to provide a lightweight, fire-resistant and flame-retardant multi-layer shielded automotive cable. The cable is made of copper-clad aluminum, high-strength and high-modulus ultra-high molecular weight polyethylene fiber and two shielding layers, which can greatly reduce the weight of the entire cable, increase the tensile strength of the cable, and improve the overall anti-interference ability of the cable.

[0004] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0005] A lightweight, fire-resistant, flame-retardant multi-layer shielded automotive cable, comprising a conductor, an insulating layer, a shielding layer and an outer sheath, wherein a plurality of conductors are twisted and then covered with an insulating layer as a core wire, and a plurality of core wires are twisted and then covered with a shielding layer and then with an outer sheath;

[0006] Each of the conductors is composed of a plurality of monofilaments, which are twisted together, and a plurality of reinforcing rods are added in the middle;

[0007] The insulating layer is a first insulating layer and a second insulating layer. After a plurality of conductors are twisted, they are wrapped with a binding tape, and then the first insulating layer, the first shielding layer and the second insulating layer are sequentially extruded to form a core wire.

[0008] The plurality of core wires are twisted together, covered with a second shielding layer, and then covered with an outer sheath;

[0009] The conductor is a copper-clad aluminum conductor;

[0010] The reinforcing rod is high-strength, high-modulus, ultra-high molecular weight polyethylene fiber;

[0011] The first shielding layer and the second shielding layer are copper-clad aluminum braided layers.

[0012] The first shielding layer and the second shielding layer are shielding layers woven from multiple single-filament copper-clad aluminum fibers with a plurality of high-strength, high-modulus, and ultra-high molecular weight polyethylene fibers added in the middle.

[0013] The diameter of the single copper-clad aluminum wire in the first shielding layer is 0.12 mm, and the diameter of the single copper-clad aluminum wire in the second shielding layer is 0.15 mm.

[0014] The monofilaments of the first shielding layer and the second shielding layer are made of copper-clad aluminum material with a copper layer ratio of 15%-25%.

[0015] The conductor is made of copper-clad aluminum material with a copper layer ratio of 15%-25%.

[0016] The wrapping tape is a mica tape.

[0017] The first insulating layer and the second insulating layer are flame-retardant thermoplastic elastomer TPV with a temperature resistance level of 125°C.

[0018] The outer sheath is made of flame-retardant polyurethane TPU with a temperature resistance grade of 125°C.

[0019] The utility model lightweight fire-resistant flame-retardant multi-layer shielded automobile cable is that high-strength high-modulus ultra-high molecular weight polyethylene fiber with high temperature resistance and high flame retardancy is added during the conductor processing, which improves the tensile strength and flame retardancy of the cable. The conductor adopts copper-clad aluminum material with a copper layer ratio of 15%-25%, which reduces the weight of the cable; the conductor is wrapped with mica tape, so that the cable can maintain an effective power-on time under a fire environment; at the same time, the two shielding layers also use copper-clad aluminum material with a copper layer ratio of 15%-25%, and high-strength high-modulus ultra-high molecular weight polyethylene fiber with high temperature resistance and high flame retardancy is also added in the middle, which not only improves the overall anti-interference of the wire, but also improves the tensile performance of the wire. The shielding layer adopts copper-clad aluminum material, which further reduces the weight of the wire. Therefore, the automobile cable of the utility model is not only lighter than the automobile cable with copper conductor and copper braided layer, but also has low production cost and high economic value. At the same time, it also has good mechanical properties such as fire resistance, high flame retardancy, tensile resistance and corrosion resistance, and is suitable for use in harsh environmental conditions.

[0020] The utility model lightweight fire-resistant flame-retardant multi-layer shielded automobile cable adopts copper-clad aluminum material, high-strength high-modulus ultra-high molecular weight polyethylene fiber and two-layer shielding layer, which can greatly reduce the weight of the whole cable, increase the tensile strength of the cable, and improve the overall anti-interference performance of the cable. At the same time, the price of copper-clad aluminum is cheaper than copper, which also reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the lightweight fire-resistant and flame-retardant multi-layer shielded automotive cable of the utility model.

[0022] In the figure: 1 conductor, 2 reinforcement rod, 3 wrapping tape, 4 first insulating layer, 5 first shielding layer, 6 second insulating layer, 7 second shielding layer, 8 outer sheath. Implementation

[0023] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] A lightweight, fire-resistant, flame-retardant multi-layer shielded automotive cable, comprising a conductor 1, an insulating layer, a shielding layer and an outer sheath 8. After a plurality of conductors 1 are twisted, an insulating layer is extruded outside to serve as a core wire. After a plurality of core wires are twisted, a shielding layer is wrapped outside, and then an outer sheath 8 is extruded. Each conductor 1 is a plurality of monofilaments, and a plurality of monofilaments are twisted together, and a plurality of reinforcing rods 2 are added in the middle to improve the strength of the conductor. The insulating layer is a first insulating layer 4 and a second insulating layer 6. After a plurality of conductors 1 are twisted, a wrapping tape 3 is wrapped outside, and then the first insulating layer 4, the first shielding layer 5 and the second insulating layer 6 are extruded in sequence to serve as a core wire; after a plurality of core wires are twisted, a second shielding layer 7 is wrapped outside, and then an outer sheath 8 is extruded.

[0025] The conductor 1 is a copper-clad aluminum conductor; the conductor 1 is made of a copper-clad aluminum material with a copper layer ratio of 15%-25%, preferably, the conductor 1 is made of a copper-clad aluminum material with a copper layer ratio of 20%.

[0026] The reinforcing rod 2 is a high-strength, high-modulus, ultra-high molecular weight polyethylene fiber. The reinforcing rod 2 also has high temperature resistance and flame retardancy, and is mainly used to improve the tensile strength.

[0027] The wrapping tape 3 is a mica tape, which is used to wrap around the outside of the multiple conductors 1 after they are twisted.

[0028] The first insulating layer 4 and the second insulating layer 6 are flame-retardant thermoplastic elastomer TPV with a temperature resistance level of 125°C. TPV is the abbreviation of Thermoplastic Vulcanizate, and its Chinese name is thermoplastic EPDM dynamically vulcanized elastomer or thermoplastic EPDM dynamically vulcanized rubber, which is a polymer elastomer material composed of highly vulcanized EPDM rubber EPDM particles dispersed in a continuous polypropylene PP phase.

[0029] The first shielding layer 5 and the second shielding layer 7 are copper-clad aluminum braided layers. The first shielding layer 5 and the second shielding layer 7 are braided shielding layers made of multiple single-filament copper-clad aluminum and a plurality of high-strength high-modulus ultra-high molecular weight polyethylene fibers are added in the middle to improve the tensile strength of the shielding layer. The single-filaments of the first shielding layer and the second shielding layer are made of copper-clad aluminum material with a copper layer ratio of 15%-25%, preferably, copper-clad aluminum material with a copper layer ratio of 20%.

[0030] Preferably, the diameter of the single copper-clad aluminum wire in the first shielding layer 5 is 0.12 mm, and the diameter of the single copper-clad aluminum wire in the second shielding layer 7 is 0.15 mm.

[0031] The outer sheath 8 is made of flame-retardant polyurethane material TPU with a temperature resistance level of 125° C. TPU (Thermoplasticpolyurethanes) is a thermoplastic polyurethane elastomer, and TPU provides tear resistance, wear resistance and bending characteristics.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A lightweight, fire-resistant, flame-retardant multi-layer shielded automotive cable, comprising a conductor (1), an insulating layer, a shielding layer and an outer sheath (8), wherein a plurality of conductors (1) are twisted and then covered with an insulating layer as a core wire, and a plurality of core wires are twisted and then covered with a shielding layer and then with an outer sheath (8); Its characteristics are: Each of the conductors (1) is composed of a plurality of monofilaments, which are twisted together, and a plurality of reinforcing rods (2) are added in the middle; The insulating layer comprises a first insulating layer (4) and a second insulating layer (6); a plurality of conductors (1) are twisted and then wrapped with a binding tape (3); and then the first insulating layer (4), the first shielding layer (5) and the second insulating layer (6) are sequentially extruded to form a core wire; A plurality of the core wires are twisted together and covered with a second shielding layer (7), and then an outer sheath (8) is extruded; The conductor (1) is a copper-clad aluminum conductor; The reinforcing rod (2) is made of high-strength, high-modulus, ultra-high molecular weight polyethylene fiber; The first shielding layer (5) and the second shielding layer (7) are copper-clad aluminum braided layers.

2. The lightweight, fire-resistant, flame-retardant multi-layer shielded automotive cable according to claim 1 is characterized by: The first shielding layer (5) and the second shielding layer (7) are shielding layers woven from a plurality of single-filament copper-clad aluminum fibers with a plurality of high-strength, high-modulus, ultra-high molecular weight polyethylene fibers added in the middle.

3. The lightweight, fire-resistant, flame-retardant multi-layer shielded automotive cable according to claim 2 is characterized by: The diameter of the single copper-clad aluminum wire of the first shielding layer (5) is 0.12 mm, and the diameter of the single copper-clad aluminum wire of the second shielding layer (7) is 0.15 mm.

4. The lightweight, fire-resistant, flame-retardant multi-layer shielded automotive cable according to claim 2 or 3, characterized in that: The monofilaments of the first shielding layer (5) and the second shielding layer (7) are made of copper-clad aluminum material with a copper layer ratio of 15%-25%.

5. The lightweight, fire-resistant, flame-retardant multi-layer shielded automotive cable according to claim 1 is characterized by: The conductor (1) is made of copper-clad aluminum material with a copper layer ratio of 15%-25%.

6. The lightweight, fire-resistant, flame-retardant multi-layer shielded automotive cable according to claim 1 is characterized by: The binding tape (3) is a mica tape.

7. The lightweight, fire-resistant, flame-retardant multi-layer shielded automotive cable according to claim 1 is characterized by: The first insulating layer (4) and the second insulating layer (6) are flame-retardant thermoplastic elastomer TPV with a temperature resistance level of 125°C.

8. The lightweight, fire-resistant, flame-retardant multi-layer shielded automotive cable according to claim 1 is characterized by: The outer sheath (8) is made of flame-retardant polyurethane material TPU with a temperature resistance level of 125°C.

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