CN212010391U - Stretch-proofing type high frequency multicore cable - Google Patents

Abstract

The utility model discloses a tensile-resistant high-frequency multi-core cable, which comprises a plurality of coaxial cores twisted to form a cable core, a fluorine resin wrapping tape layer, a copper-plastic composite tape wrapping a shielding layer and an outer sheath. The axis core includes a core body formed by concentric twisting of an inner conductor and a number of PFA resin-filled wires. A number of strands are twisted together. The strands are composed of a number of tinned copper monofilaments with a diameter of 0.02mm to 0.03mm. The layers of tinned copper wires are formed by twisting each other in a reverse spiral, and the double-layered tinned copper wires are coated with lubricating oil. The cable has good tensile strength, better flexibility, bending resistance and torsion resistance, is not easy to break, low frequency signal attenuation, durable use.

Description

Tensile high frequency multi-core cable

technical field

The utility model relates to the technical field of shielded cables, in particular to a tensile-resistant high-frequency multi-core cable.

Background technique

An important carrier of electromagnetic noise propagation is the various cables used in mechanical and electronic equipment. Some of them are noise sources and some are disturbed objects. A very important way to combat electromagnetic noise interference on electrical lines is to use shielded cables. Multi-core cables are one of the main varieties of cables. Electrical connection and control of mechanical and electronic equipment, medical equipment, etc. need to be applied to multi-core cables with good flexibility , which puts forward higher requirements for multi-core cables. The tensile strength of ordinary cables is average, and the core stretchability is poor. After the cable is subjected to multiple bending and twisting, the core or shielding layer is prone to disconnection. The high-frequency signal transmission characteristics are poor, and the shielding effect is unstable, which affects the electrical characteristics. , not durable.

Utility model content

Aiming at the deficiencies of the prior art, the technical problem to be solved by the utility model is to provide a tensile-resistant high-frequency multi-core cable, which has good tensile strength, flexibility, resistance to Better bending and torsion resistance, less disconnection, less attenuation of high-frequency signals, and durable use.

The utility model solves the above technical problems through the following technical solutions.

The tensile-resistant high-frequency multi-core cable includes a plurality of coaxial cores twisted to form a cable core, and the outside of the cable core is sequentially covered with a fluororesin wrapping tape layer, a copper-plastic composite tape wrapping shielding layer and an outer sheath , the coaxial wire core includes a wire core body formed by concentric twisting of an inner conductor and a number of PFA resin filled wires, and the outside of the wire core body is sequentially covered with an inner insulating layer, a metal winding shielding layer, a metal braided shielding layer and an outer Insulation layer, the inner conductor is composed of multiple strands, the strands are composed of a number of tinned copper monofilaments with a diameter of 0.02mm to 0.03mm, and the metal winding shielding layer is a copper alloy wire. One-way spiral winding structure, the metal braided shielding layer is composed of double-layer tin-plated copper wires that are spirally wound and braided against each other, and the double-layer tin-plated copper wires are coated with lubricating oil.

Preferably, the outer diameter of the strands is 0.04 mm to 0.15 mm, and the strands are constituted by three to five tinned copper monofilaments which are twisted in a cross and helical manner.

Preferably, the fluororesin wrapping tape layer is a fluororesin wrapping tape gap wrapping structure, and the fluororesin wrapping tape is FEP, PFA, ETFE or PTFE resin tape.

Preferably, the wrapping shielding layer of the copper-plastic composite tape is a wrap-around structure of the copper-plastic composite tape with a thickness of 0.08 mm to 0.3 mm, and the copper-plastic composite tape includes an outer layer of copper foil tape and an inner layer of PTFE resin.

Preferably, the outer sheath is a PVC or PE sheath, and the thickness of the outer sheath is 0.5 mm to 1.8 mm.

Preferably, the outer diameter of the PFA resin filling wire is 0.03 mm to 0.1 mm.

Preferably, the inner insulating layer and the outer insulating layer are both FEP, PFA or ETFE resin insulating layers.

Preferably, the metal winding shielding layer is composed of two kinds of tinned copper wires with different diameters mixed unidirectionally spirally wound, and the helix angle is 25 degrees to 40 degrees, and the diameter ratio of the two different diameters of tinned copper wires is between between 0.9 and 1 and a diameter of 0.02mm to 0.08mm.

Preferably, the metal braided shielding layer is composed of an inner layer of tinned copper wire and an outer layer of tinned copper wire that are spirally wound and braided against each other, and the helix angle is 15 degrees to 35 degrees, and the diameter of the inner layer of tinned copper wire is less than The diameter of the outer tinned copper wire is 0.08 mm to 0.12 mm, and the diameter of the outer tinned copper wire is 0.1 mm to 0.15 mm.

The beneficial effects of the present utility model:

1. Use tinned copper monofilament with a diameter of 0.02mm to 0.03mm, its tensile strength is greater than 330MPa, and its elongation is greater than 5%, which is suitable for fine-diameter production. The formed strands have been greatly improved in tensile strength, and have excellent flexibility and stretchability. Moreover, the inner conductor and the PFA resin-filled wire are concentrically twisted, and the inner conductor, the PFA resin-filled wire and the inner insulating layer are twisted concentrically. There is a space gap between them, which has good flexibility, increased tensile strength, prevents wire breakage, effectively reduces the torque force during torsional bending, and improves the torsional resistance of the cable.

2. The metal winding shielding layer of the coaxial core is composed of unidirectional spiral winding of copper alloy wire. The conductivity of copper alloy wire is better than that of tinned copper alloy wire. Signal attenuation is small, preventing internal high-frequency signals from leaking to the outside. The metal winding shielding layer is composed of two tinned copper wires of different diameters that are twisted and braided in a reverse spiral, which can effectively reduce the weaving gap, reduce the friction phenomenon between the tinned copper wires, improve the noise shielding characteristics and increase the flexibility. A metal braided shielding layer is wound on the metal winding shielding layer, and the double-layer tinned copper wire of the metal braided shielding layer is coated with lubricating oil, which greatly reduces the friction between the metal winding shielding layer and the metal braided shielding layer and improves the bending resistance. . The metal braided shielding layer is composed of the inner layer of tinned copper wire and the outer layer of tinned copper wire which are spirally wound and braided against each other. The inner layer of tinned copper monofilament has a large weaving density, which helps prevent internal high-frequency signals from leaking to the outside. The outer layer of tinned copper monofilament has a small electrical resistance, which helps to suppress interference from external signals. The diameter of the wire is different from that of the outer tinned copper wire, which can effectively reduce the braiding gap, improve the noise shielding performance, increase the flexibility, bending resistance and torsion resistance of the cable, and is not easy to break.

3. The wrapping shielding layer of the copper-plastic composite tape is a wrapping structure of the copper-plastic composite tape, which can effectively suppress the leakage of internal signals or noise to the outside and suppress the interference from external signals. The copper-plastic composite tape includes the outer surface of the copper foil tape. layer and the inner layer of the PET film, so that the shielding layer is not prone to breakage. At the same time, the fluororesin wrapping tape layer is a gap wrapping structure. The stress concentration of the clad shield reduces the torque force and improves the torsion resistance and durability.

Description of drawings

1 is a schematic cross-sectional structure diagram of a specific embodiment of the application;

FIG. 2 is a schematic cross-sectional structure diagram of a coaxial wire core according to a specific embodiment of the present application.

In the picture: 1-coaxial core, 11-inner conductor, 12-PFA resin filled wire, 13-inner insulation layer, 14-metal winding shielding layer, 15-metal braided shielding layer, 16-outer insulation layer, 17- Stranded wire, 2-fluororesin wrapping tape layer, 3-copper-plastic composite tape wrapping shielding layer, 4-outer sheath.

Detailed ways

The technical solutions of the present utility model will be further described below with reference to the accompanying drawings and through specific embodiments.

As shown in FIG. 1 , the tensile-resistant high-frequency multi-core cable according to the embodiment of the present invention includes a plurality of coaxial wire cores 1 twisted together to form a cable core. As shown in FIG. 2 , the coaxial wire core 1 includes an inner The conductor 11 and a plurality of PFA resin filled wires 12 are concentrically twisted to form a wire core body. The inner conductor 11 is formed by a plurality of strands 17. In this embodiment, seven strands are twisted. Preferably, the The outer diameter of the strands is 0.04mm to 0.15mm. The strand 17 is composed of a plurality of tinned copper monofilaments with a diameter of 0.02 mm to 0.03 mm, which are crossed and twisted. Preferably, the strands are composed of three to five tinned copper monofilaments. In this embodiment, three tin-plated copper monofilaments are crossed and twisted in a spiral. The outer diameter of the PFA resin-filled wire 12 is preferably 0.03 mm to 0.1 mm.

The outside of the wire core body is sequentially covered with an inner insulating layer 13, a metal winding shielding layer 14, a metal braided shielding layer 15 and an outer insulating layer 16. The metal winding shielding layer 14 is formed by unidirectional spiral winding of copper alloy wires. In other words, the metal winding shielding layer 14 is composed of two kinds of tinned copper wires with different diameters mixed with one-way helical winding and the helix angle is 25 degrees to 40 degrees. The diameter ratio of the two different diameters of tinned copper wires is Between 0.9 and 1 and a diameter of 0.02mm to 0.08mm. The metal braided shielding layer 15 is composed of double-layer tinned copper wires that are spirally wound and braided against each other. The double-layered tinned copper wires are coated with lubricating oil. Specifically, the metal braided shielding layer 15 is an inner layer. The tinned copper wire and the outer layer of tinned copper wire are formed by twisting and weaving in a reverse spiral with each other, and the helix angle is 15 degrees to 35 degrees. The diameter of the inner layer of tinned copper wire is smaller than the diameter of the outer layer of tinned copper wire. The diameter of the inner tinned copper wire is 0.08mm to 0.12mm, and the diameter of the outer layer of tinned copper wire is 0.1mm to 0.15mm. The inner insulating layer 13 and the outer insulating layer 16 are, for example, FEP, PFA or ETFE resin insulating layers.

The outside of the cable core is sequentially covered with a fluororesin wrapping tape layer 2, a copper-plastic composite tape wrapping shielding layer 3 and an outer sheath 4. Specifically, the fluororesin wrapping tape layer 2 is a fluororesin wrapping wrapping. With gap wrapping structure, the fluororesin wrapping tape is FEP, PFA, ETFE or PTFE resin tape. The copper-plastic composite tape wrapping shielding layer 3 is of a copper-plastic composite tape overlap wrapping structure and has a thickness of 0.08 mm to 0.3 mm. The copper-plastic composite tape includes an outer layer of copper foil tape and an inner layer of PTFE resin. The outer sheath 4 is a PVC or PE sheath, and the thickness of the outer sheath 4 is 0.5 mm to 1.8 mm.

The present invention is described through the embodiments, and those skilled in the art know that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the guidance of the present invention, the features and embodiments may be modified to adapt a particular situation and material to it without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the claims of the present application belong to the protection scope of the present invention.

Claims (9)

1. A tensile-resistant high-frequency multi-core cable, characterized in that it comprises a plurality of coaxial wire cores (1) twisted to form a cable core, and the outside of the cable core is sequentially covered with a fluororesin wrapping tape layer (2), The copper-plastic composite tape is wrapped around the shielding layer (3) and the outer sheath (4), and the coaxial wire core (1) comprises a wire core formed by concentric stranding of an inner conductor (11) and a plurality of PFA resin-filled wires (12) The outer part of the wire core body is sequentially covered with an inner insulating layer (13), a metal winding shielding layer (14), a metal braided shielding layer (15) and an outer insulating layer (16), and the inner conductor (11) is A plurality of strands (17) are twisted together, the strands (17) are composed of a plurality of tinned copper monofilaments with a diameter of 0.02mm to 0.03mm, and the metal winding shielding layer (14) is a copper alloy. The wire is spirally wound in one direction, and the metal braided shielding layer (15) is formed of double-layer tinned copper wires that are spirally wound and braided against each other, and the double-layered tinned copper wires are coated with lubricating oil. 2 . The tensile-resistant high-frequency multi-core cable according to claim 1 , wherein the outer diameter of the strand is 0.04mm to 0.15mm, and the strand adopts three to five tinned copper monofilaments. 3 . Cross-helix twist. 3. The tensile-resistant high-frequency multi-core cable according to claim 1, wherein the fluororesin wrapping tape layer (2) is a fluororesin wrapping tape gap wrapping structure, and the fluororesin wrapping tape layer (2) has a gap wrapping structure. The tape is FEP, PFA, ETFE or PTFE resin tape. 4. The tensile-resistant high-frequency multi-core cable according to claim 1, characterized in that: the copper-plastic composite tape wrapping shielding layer (3) is a copper-plastic composite tape overlay wrapping structure and has a thickness of 0.08 mm to 0.3 mm, the copper-plastic composite tape includes an outer layer of copper foil tape and an inner layer of PTFE resin. 5. The tensile-resistant high-frequency multi-core cable according to claim 1, wherein the outer sheath (4) is a PVC or PE sheath, and the thickness of the outer sheath (4) is 0.5mm to 1.8mm. 6. The tensile-resistant high-frequency multi-core cable according to claim 1, wherein the outer diameter of the PFA resin-filled wire (12) is 0.03 mm to 0.1 mm. 7. The tensile-resistant high-frequency multi-core cable according to claim 1, wherein the inner insulating layer (13) and the outer insulating layer (16) are both FEP, PFA or ETFE resin insulating layers . 8. The tensile-resistant high-frequency multi-core cable according to claim 1, characterized in that: the metal winding shielding layer (14) is composed of two kinds of tinned copper wires of different diameters mixed unidirectionally spirally wound and spirally wound. The angle is 25 degrees to 40 degrees, the diameter ratio of the two different diameter tinned copper wires is between 0.9 and 1 and the diameters are 0.02 mm to 0.08 mm. 9 . The tensile-resistant high-frequency multi-core cable according to claim 1 , wherein the metal braided shielding layer ( 15 ) is an inner layer of tinned copper wire and an outer layer of tinned copper wire that are mutually reversed spirals. 10 . It is formed by winding and weaving and the helix angle is 15 degrees to 35 degrees, the diameter of the inner layer of tinned copper wire is smaller than the diameter of the outer layer of tinned copper wire, and the diameter of the inner layer of tinned copper wire is 0.08mm to 0.12mm, so The diameter of the outer tinned copper wire is 0.1mm to 0.15mm.

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