CN217008728U

CN217008728U - Light 2-core conductive fiber shielding cable

Info

Publication number: CN217008728U
Application number: CN202220459490.1U
Authority: CN
Inventors: 李清华; 吴英俊; 蔡长威; 刘书鑫; 王礼国
Original assignee: Zhejiang Yuantong Wire and Cable Manufacturing Co Ltd
Current assignee: Zhejiang Yuantong Wire and Cable Manufacturing Co Ltd
Priority date: 2022-03-04
Filing date: 2022-03-04
Publication date: 2022-07-19
Anticipated expiration: 2032-03-04

Abstract

The utility model discloses a light 2-core conductive fiber shielding cable, wherein five PFA resin core strips are arranged in an X shape to form an isolation core material, two inner conductors are symmetrically arranged at two sides of the isolation core material and are jointly twisted to form a cable core, the outer diameter of the PFA resin core strips is the same as that of the inner conductors and is not less than 0.2mm, the cable core is sequentially coated with a foamed fluororesin tape winding inner sheath layer, a conductive fiber winding shielding layer and a fluororesin extrusion outer sheath layer, the conductive fiber winding shielding layer is of a conductive fiber bundle spiral winding structure, a plurality of polyacrylonitrile-based carbon fibers are twisted and coated with a copper conductive coating layer to form the conductive fiber bundle, and the total thickness of the foamed fluororesin tape winding inner sheath layer and the fluororesin extrusion outer sheath layer is 0.3mm to 0.45 mm. The cable is manufactured based on small diameter and light weight, has better bending resistance, can effectively prevent conductor disconnection, and has stable electrical shielding performance.

Description

Light 2-core conductive fiber shielding cable

Technical Field

The utility model relates to the technical field of cables, in particular to a light 2-core conductive fiber shielding cable.

Background

In an automated industrial production line, a shielded cable is often used for a robot, a mobile drive system, and the like. Due to rapid development of transmission technology, maintenance testing technology and the like, communication cables gradually develop to be thin and light, however, the existing shielding cables generally adopt a metal braided shielding structure, so that the number of copper wires is large, the weight is large, the manufacturing cost is high, and the requirements of light production are not facilitated.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model aims to provide a light 2-core conductive fiber shielding cable which is manufactured based on small diameter and light weight, has better bending resistance, can effectively prevent the conductor from breaking and has stable electrical shielding performance.

The utility model solves the technical problems through the following technical scheme.

Light 2 core conductive fiber shielded cable, five PFA resin core strips are X-shaped and arrange and constitute the isolation core, and two inner conductor symmetrical arrangement are in the both sides of isolation core and transposition jointly constitute the cable core, PFA resin core strip external diameter with the inner conductor external diameter is the same and not less than 0.2mm, the cable core outside cladding has the foaming fluororesin area in proper order around the crowded package oversheath layer of package inner sheath layer, conductive fiber winding shielding layer and fluororesin, conductive fiber winding shielding layer is conductive fiber bundle spiral winding structure, conductive fiber bundle is a plurality of polyacrylonitrile base carbon fiber transposition and coats copper conductive coating and forms, foaming fluororesin area around package inner sheath layer with the crowded package oversheath layer of fluororesin is total thickness 0.3mm to 0.45 mm.

Preferably, the outer diameter of the inner conductor is not more than 0.5 mm.

Preferably, the polyacrylonitrile-based carbon fiber has a wire diameter of not more than 20 μm.

Preferably, the conductive fiber winding shielding layer has a weaving density of 95% to 98%.

Preferably, the inner conductor is formed by stranding a plurality of tinned copper monofilaments, and the wire diameter of each tinned copper monofilament is 0.02 mm-0.05 mm.

Preferably, the inner conductor lay length is 5 to 15 times the outer diameter of the inner conductor.

Preferably, the lay length of the cable core is 10 to 20 times of the outer diameter of the inner conductor.

Preferably, the thickness ratio of the foamed fluororesin tape wrapped inner jacket layer to the fluororesin extruded outer jacket layer is 1:1 to 1: 1.5.

Preferably, the conductive fiber bundle has a helix angle of 40 to 55 degrees.

Preferably, the wire diameter of the conductive fiber bundle is 0.05mm to 0.08 mm.

The utility model has the beneficial effects that:

1. the isolation core material with the X-shaped cross section is formed by arranging the five PFA resin core strips, the electric conductivity is low, the high-frequency signal transmission characteristic is favorably improved, the attenuation is small, the isolation core material can effectively bear the lateral pressure during bending, the bending resistance of the cable is improved, the occurrence of the disconnection of the inner conductor is favorably prevented, and the stability of the electrical characteristic is ensured. The X-shaped isolation core material is used for isolating the two inner conductors instead of the inner conductor insulating layer, so that the outer diameter of the PFA resin core strip is not smaller than 0.2mm, the insulation isolation distance between the two inner conductors is ensured, and the electrical characteristics are ensured.

The PFA resin core bar has the same outer diameter as the inner conductor, so that the circular section of the cable core can be ensured after twisting, which is beneficial to diameter reduction manufacturing.

3. The metal shielding layer is removed, the light design is facilitated, the shielding layer is prevented from being broken, the conductive fiber bundle of the conductive fiber winding shielding layer is formed by twisting polyacrylonitrile-based carbon fibers and coating copper conductive coatings, the weight of the cable is reduced on the basis of ensuring the stable shielding performance, the cost is reduced, and the requirements of thin-diameter light production are met.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram according to an embodiment of the present invention.

In the figure: the cable comprises 1-PFA resin core strip, 2-inner conductor, 3-foaming fluororesin tape wrapping inner sheath layer, 4-conductive fiber wrapping shielding layer and 5-fluororesin extrusion outer sheath layer.

Detailed Description

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

As shown in fig. 1, in the light 2-core conductive fiber shielded cable according to the embodiment of the present invention, five PFA resin core bars 1 are arranged in an X shape to form an isolation core material, and two inner conductors 2 are symmetrically arranged on two sides of the isolation core material and are twisted together to form a cable core. The outer diameter of the PFA resin core strip 1 is the same as that of the inner conductor 2 and is not less than 0.2mm, and further, the outer diameter of the inner conductor 2 is not more than 0.5 mm. The lay length of the cable core is 10 to 20 times of the outer diameter of the inner conductor 2. Specifically, the inner conductor 2 is formed by stranding a plurality of tinned copper monofilaments, and the wire diameter of each tinned copper monofilament is 0.02mm to 0.05 mm. The lay length of the inner conductor 2 is 5 times to 15 times of the outer diameter of the inner conductor 2.

The cable core outside cladding has the foaming fluororesin area in proper order around covering inner sheath layer 3, conductive fiber winding shielding layer 4 and fluororesin crowded package oversheath layer 5. The conductive fiber winding shielding layer 4 is a conductive fiber bundle spiral winding structure, the spiral angle is 40 degrees to 55 degrees, and the weaving density of the conductive fiber winding shielding layer 4 is 95 percent to 98 percent. The conductive fiber bundle is formed by stranding a plurality of polyacrylonitrile-based carbon fibers and coating a copper conductive coating, and further, the linear diameter of the polyacrylonitrile-based carbon fibers is not more than 20 mu m. The wire diameter of the conductive fiber bundle is 0.05mm to 0.08 mm. The total thickness of the foamed fluororesin tape wrapped inner sheath layer 3 and the fluororesin extruded outer sheath layer 5 is 0.3mm to 0.45 mm. The thickness ratio of the foamed fluororesin tape wrapped inner sheath layer 3 to the fluororesin extruded outer sheath layer 5 is 1:1 to 1: 1.5.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent application shall be subject to the appended claims.

Claims

1. Light 2 core conductive fiber shielded cable, characterized by: five PFA resin core strips (1) are X-shaped and arrange to constitute and keep apart the core, and two inner conductor (2) symmetrical arrangement are in keep apart the both sides of core and strand jointly and constitute the cable core, PFA resin core strip (1) external diameter with inner conductor (2) external diameter is the same and not less than 0.2mm, the cable core outside cladding has foaming fluororesin area to wrap inner sheath layer (3), conductive fiber winding shielding layer (4) and fluororesin crowded package oversheath layer (5) in proper order, conductive fiber winding shielding layer (4) are conductive fiber bundle spiral winding structure, conductive fiber bundle is a plurality of polyacrylonitrile base carbon fiber transposition and coats copper conductive coating layer formation, foaming fluororesin area around wrap inner sheath layer (3) with fluororesin crowded package oversheath layer (5) total thickness is 0.3mm to 0.45 mm.

2. The lightweight 2-core conductive fiber shielded cable of claim 1, wherein: the outer diameter of the inner conductor (2) is not more than 0.5 mm.

3. The lightweight 2-core conductive fiber shielded cable of claim 1, wherein: the wire diameter of the polyacrylonitrile-based carbon fiber is not more than 20 μm.

4. The lightweight 2-core conductive fiber shielded cable of claim 1, wherein: the weaving density of the conductive fiber winding shielding layer (4) is 95-98%.

5. The lightweight 2-core conductive fiber shielded cable of claim 1, wherein: the inner conductor (2) is formed by stranding a plurality of tinned copper monofilaments, and the wire diameter of each tinned copper monofilament is 0.02 mm-0.05 mm.

6. The lightweight 2-core conductive fiber shielded cable according to claim 5, wherein: the lay length of the inner conductor (2) is 5-15 times of the outer diameter of the inner conductor (2).

7. The lightweight 2-core conductive fiber shielded cable of claim 1, wherein: the lay length of the cable core is 10 to 20 times of the outer diameter of the inner conductor (2).

8. The lightweight 2-core conductive fiber shielded cable of claim 1, wherein: the thickness ratio of the foamed fluororesin tape wrapping inner sheath layer (3) to the fluororesin extrusion outer sheath layer (5) is 1:1 to 1: 1.5.

9. A lightweight 2-core conductive fiber shielded cable according to claim 1, wherein: the conductive fiber bundle has a helix angle of 40 to 55 degrees.

10. The lightweight 2-core conductive fiber shielded cable of claim 1, wherein: the wire diameter of the conductive fiber bundle is 0.05mm to 0.08 mm.