CN219916753U - Extrusion-resistant stretch-proof multi-core flat cable - Google Patents
Extrusion-resistant stretch-proof multi-core flat cable Download PDFInfo
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- CN219916753U CN219916753U CN202321255825.9U CN202321255825U CN219916753U CN 219916753 U CN219916753 U CN 219916753U CN 202321255825 U CN202321255825 U CN 202321255825U CN 219916753 U CN219916753 U CN 219916753U
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- Prior art keywords
- extrusion
- core
- flat cable
- sheath layer
- elliptical
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- 238000001125 extrusion Methods 0.000 title claims abstract description 51
- 239000011162 core material Substances 0.000 claims abstract description 73
- 239000000835 fiber Substances 0.000 claims abstract description 33
- 229910052802 copper Inorganic materials 0.000 claims abstract description 30
- 239000010949 copper Substances 0.000 claims abstract description 30
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000004020 conductor Substances 0.000 claims abstract description 27
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 23
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 23
- 229910000077 silane Inorganic materials 0.000 claims abstract description 23
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000004743 Polypropylene Substances 0.000 claims abstract description 14
- 229920001155 polypropylene Polymers 0.000 claims abstract description 14
- 229920005989 resin Polymers 0.000 claims abstract description 14
- 239000011347 resin Substances 0.000 claims abstract description 14
- 238000004804 winding Methods 0.000 claims abstract description 14
- -1 polypropylene Polymers 0.000 claims abstract description 13
- 125000003118 aryl group Chemical group 0.000 claims abstract description 11
- 239000010410 layer Substances 0.000 claims description 49
- 238000000576 coating method Methods 0.000 claims description 9
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 8
- 239000004917 carbon fiber Substances 0.000 claims description 8
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 5
- 239000012790 adhesive layer Substances 0.000 claims description 3
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 claims description 3
- 238000009954 braiding Methods 0.000 claims description 2
- 238000005452 bending Methods 0.000 description 4
- 229920006240 drawn fiber Polymers 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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- Insulated Conductors (AREA)
Abstract
The utility model discloses an extrusion-resistant stretch-resistant multi-core flat cable, which comprises four flat cable cores, wherein the four flat cable cores are twisted together around an elliptical polypropylene resin central core bar to form an elliptical cable core, a silane grafted crosslinked high-density polyethylene extrusion inner sheath layer, a conductive fiber winding shielding layer and a silane grafted crosslinked high-density polyethylene extrusion outer sheath layer are sequentially coated outside the cable core, each flat cable core comprises an elliptical inner conductor and a PFA extrusion sheath layer, each inner conductor is formed by twisting a plurality of elliptical copper monofilaments and a plurality of para-type wholly aromatic copolyamide stretched fiber core materials together, the ratio of the minor axis to the major axis of each copper monofilament is 1:1.8-1:4, and the outer diameter of each para-type wholly aromatic copolyamide stretched fiber core material is 15-40% of the minor axis of each copper monofilament. The inner conductor of the cable has better flexibility and tensile property, is resistant to extrusion deformation, is not easy to generate conductor deformation and wire breakage, and has better durability.
Description
Technical Field
The utility model belongs to the technical field of cables, and particularly relates to an extrusion-resistant stretch-resistant multi-core flat cable.
Background
In an automated industrial production line, multi-core cables are often used for robots, mobile driving systems, and the like. Due to the trend of miniaturized application of robots, the rapid development of transmission technology, maintenance test technology and the like, multi-core cables are developed towards the preparation direction of diameter reduction and light weight. Most of multi-core cables in practical application are round in section, when the multi-core cables bear extrusion bending, the flexibility and the tensile resistance are poor, the inner conductor is easy to deform and break, the electrical characteristics are unstable, the normal action of a robot is seriously influenced, and hidden danger is brought to the normal safe production order.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model aims to provide the extrusion-resistant stretch-proof multi-core flat cable, wherein the inner conductor has better flexibility and stretch-proof performance, is extrusion-resistant and deformation-resistant, is not easy to generate conductor deformation and wire breakage, and has reliable electrical characteristics and better durability.
The utility model solves the technical problems through the following technical proposal.
The extrusion-resistant stretch-resistant multi-core flat cable comprises four flat cable cores, wherein the four flat cable cores are twisted together around an elliptical polypropylene resin central core bar to form an elliptical cable core, a silane grafted crosslinked high-density polyethylene extrusion inner sheath layer, a conductive fiber winding shielding layer and a silane grafted crosslinked high-density polyethylene extrusion outer sheath layer are sequentially coated outside the cable core, each flat cable core comprises an elliptical inner conductor and a PFA extrusion sheath layer, each inner conductor is formed by twisting a plurality of elliptical copper monofilaments and a plurality of para-type wholly aromatic copolyamide stretched fiber core materials together, the ratio of the minor axes of the copper monofilaments to the major axes is 1:1.8-1:4, the major axes of the copper monofilaments are 0.12-0.35 mm, the outer diameter of the para-type wholly aromatic copolyamide stretched fiber core materials is 15-40% of the minor axes of the copper monofilaments, and the thickness of the PFA extrusion sheath layer is not less than 0.3mm.
Preferably, the long axis of the inner conductor is not more than 9mm, and the short axis of the cable core is not more than 4mm.
Preferably, the inner conductor has a lay length of 10 to 20 times the long axis of the inner conductor.
Preferably, the short axis of the polypropylene resin central core strip is not smaller than the short axis of the flat wire core, and the long axis of the polypropylene resin central core strip is 60% to 80% of the long axis of the flat wire core.
Preferably, the external surface of the silane grafted crosslinked high-density polyethylene extrusion inner sheath layer and the internal surface of the silane grafted crosslinked high-density polyethylene extrusion outer sheath layer are both provided with EVA adhesive layers.
Preferably, the outer part of the polypropylene resin central core strip is coated with an ETFE wrapping layer.
Preferably, the conductive fiber winding shielding layer is in a conductive fiber bundle spiral winding structure.
Preferably, the conductive fiber bundles are formed by twisting two polyacrylonitrile-based carbon fibers with different wire diameters and coating copper conductive coatings, and the wire diameters of the polyacrylonitrile-based carbon fibers are not more than 25 mu m.
Preferably, the conductive fiber wound shielding layer has a braid density of 95% to 98%.
Preferably, the total thickness of the silane grafted crosslinked high-density polyethylene extrusion inner sheath layer and the silane grafted crosslinked high-density polyethylene extrusion outer sheath layer is 0.8mm to 5mm.
The utility model has the beneficial effects that:
1. the strength and bending resistance of the copper monofilament are considered, the long axis of the copper monofilament is 0.12mm to 0.35mm, the ratio of the short axis to the long axis of the copper monofilament is optimized to be 1:1.8 to 1:4, the oval copper monofilament can better bear lateral pressure in bending extrusion and other states than the copper monofilament with a round section, the extrusion deformation resistance is better, the deformation breaking is not easy to occur, the outer diameter of the para-type wholly aromatic copolyamide stretched fiber core material is 15 to 40 percent of the short axis of the copper monofilament, the gap between the copper monofilaments is favorably filled, the copper monofilaments are tightly twisted together, the stretching elastic modulus of the para-type wholly aromatic copolyamide stretched fiber core material is large, the tensile strength of an inner conductor is greatly improved, the inner conductor has high flexibility and bending resistance, the extrusion deformation resistance of the inner conductor is improved, the deformation breaking condition of the copper monofilament is effectively reduced, the stable electrical characteristics are ensured, and the durability is better.
2. The shielding conductor is formed by winding the shielding layer through the conductive fiber to replace the metal shielding layer, so that the design of reducing diameter and light weight is facilitated, the conductive fiber winding shielding layer is of a conductive fiber bundle spiral winding structure, the conductive fiber bundles are formed by twisting polyacrylonitrile-based carbon fibers with two different wire diameters and coating copper conductive coatings, the copper conductive coatings and the outer surface of the polyacrylonitrile-based carbon fibers are firmly coated, gaps among the fibers are better covered in a penetrating manner, the weaving density is 95-98%, the signal leakage from the inside to the outside is effectively restrained, the interference from the external signal is restrained, and stable and reliable electrical characteristics are ensured.
3. The EVA adhesive layer is arranged on the outer surface of the inner sheath layer of the silane grafted crosslinked high-density polyethylene extrusion and the inner surface of the outer sheath layer of the silane grafted crosslinked high-density polyethylene extrusion, so that the conductive fiber winding shielding layer and the inner sheath layer are adhered into a whole in a sealing way, the stress concentration of the shielding layer is reduced, the tensile resistance is improved, the stable shielding performance of the cable is ensured, and the working reliability of the cable is improved.
Drawings
FIG. 1 is a schematic cross-sectional view of an embodiment of the present utility model.
Reference numerals illustrate:
the fiber comprises a 1-flat wire core, a 2-polypropylene resin central core strip, a 3-silane grafted crosslinked high-density polyethylene extruded inner sheath layer, a 4-conductive fiber wound shielding layer, a 5-silane grafted crosslinked high-density polyethylene extruded outer sheath layer, a 6-inner conductor, a 7-PFA extruded sheath layer, an 8-copper monofilament and a 9-para-type wholly aromatic copolyamide stretched fiber core material.
Description of the embodiments
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, the extrusion-resistant stretch-proof multi-core flat cable of the embodiment of the utility model comprises four flat wire cores 1 which are stranded together around an oval polypropylene resin central core strip 2 to form an oval cable core, and further, the outside of the polypropylene resin central core strip 2 is coated with an ETFE wrapping layer. Specifically, the minor axis of the polypropylene resin central core strip 2 is not smaller than the minor axis of the flat wire core 1, and the major axis of the polypropylene resin central core strip 2 is 60% to 80% of the major axis of the flat wire core 1. The flat wire core 1 comprises an elliptical inner conductor 6 and a PFA extrusion sheath layer 7. The inner conductor 6 is formed by twisting a plurality of elliptic copper monofilaments 8 and a plurality of para-type wholly aromatic copolyamide drawn fiber core materials 9 together, and further, the twisting pitch of the inner conductor 6 is 10 times to 20 times of the long axis of the inner conductor 6. The ratio of the short axis to the long axis of the copper monofilament 8 is 1:1.8 to 1:4, further, the long axis of the inner conductor 6 is not more than 9mm, and the short axis of the cable core is not more than 4mm. The major axis of the copper monofilament 8 is 0.12mm to 0.35mm, and the outside diameter of the para-type wholly aromatic copolyamide drawn fiber core material 9 is 15% to 40% of the minor axis of the copper monofilament 8. The thickness of the PFA extrusion sheath layer 7 is not less than 0.3mm.
The cable core is sequentially coated with a silane grafted crosslinked high-density polyethylene extrusion inner sheath layer 3, a conductive fiber winding shielding layer 4 and a silane grafted crosslinked high-density polyethylene extrusion outer sheath layer 5, and further, EVA bonding layers are arranged on the outer surface of the silane grafted crosslinked high-density polyethylene extrusion inner sheath layer 3 and the inner surface of the silane grafted crosslinked high-density polyethylene extrusion outer sheath layer 5. In one embodiment, the conductive fiber winding shielding layer 4 is a conductive fiber bundle spiral winding structure, further, the conductive fiber bundle is formed by twisting two polyacrylonitrile-based carbon fibers with different wire diameters and coating copper conductive coating, and the wire diameter of the polyacrylonitrile-based carbon fibers is not more than 25 μm. The braiding density of the conductive fiber wound shielding layer 4 is 95% to 98%. The total thickness of the silane grafted crosslinked high-density polyethylene extrusion inner sheath layer 3 and the silane grafted crosslinked high-density polyethylene extrusion outer sheath layer 5 is 0.8mm to 5mm.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. An extrusion-resistant stretch-proof multi-core flat cable is characterized in that: the cable comprises four flat wire cores (1) which are twisted together around an elliptical polypropylene resin central core strip (2) to form an elliptical cable core, wherein an inner sheath layer (3), a conductive fiber winding shielding layer (4) and an outer sheath layer (5) are sequentially coated outside the cable core in a silane grafted crosslinked high-density polyethylene extrusion mode, the flat wire cores (1) comprise an elliptical inner conductor (6) and a PFA extrusion sheath layer (7), the inner conductor (6) is formed by twisting a plurality of elliptical copper monofilaments (8) and a plurality of para-type wholly aromatic copolyamide stretching fiber core materials (9) together, the ratio of the short axis to the long axis of each copper monofilament (8) is 1:1.8-1:4, the long axis of each copper monofilament (8) is 0.12-0.35 mm, the outer diameter of each para-type wholly aromatic copolyamide stretching fiber core material (9) is 15-40% of the short axis of each copper monofilament (8), and the thickness of each PFA extrusion sheath layer (7) is not less than 0.3mm.
2. The extrusion-resistant stretch-proof multi-core flat cable according to claim 1, wherein: the long axis of the inner conductor (6) is not more than 9mm, and the short axis of the cable core is not more than 4mm.
3. The extrusion-resistant stretch-proof multi-core flat cable according to claim 1, wherein: the lay length of the inner conductor (6) is 10 times to 20 times of the long axis of the inner conductor (6).
4. The extrusion-resistant stretch-proof multi-core flat cable according to claim 1, wherein: the short axis of the polypropylene resin central core strip (2) is not smaller than the short axis of the flat wire core (1), and the long axis of the polypropylene resin central core strip (2) is 60-80% of the long axis of the flat wire core (1).
5. The extrusion-resistant stretch-proof multi-core flat cable according to claim 1, wherein: EVA adhesive layers are arranged on the outer surface of the silane grafted crosslinked high-density polyethylene extrusion inner sheath layer (3) and the inner surface of the silane grafted crosslinked high-density polyethylene extrusion outer sheath layer (5).
6. The extrusion-resistant stretch-proof multi-core flat cable according to claim 1, wherein: and the outer part of the polypropylene resin central core strip (2) is coated with an ETFE wrapping layer.
7. The extrusion-resistant stretch-proof multi-core flat cable according to claim 1, wherein: the conductive fiber winding shielding layer (4) is of a conductive fiber bundle spiral winding structure.
8. The extrusion-resistant stretch-proof multi-core flat cable according to claim 7, wherein: the conductive fiber bundles are formed by twisting two polyacrylonitrile-based carbon fibers with different wire diameters and coating copper conductive coatings, and the wire diameters of the polyacrylonitrile-based carbon fibers are not more than 25 mu m.
9. The extrusion-resistant stretch-proof multi-core flat cable according to claim 1, wherein: the braiding density of the conductive fiber wound shielding layer (4) is 95-98%.
10. The extrusion-resistant stretch-proof multi-core flat cable according to claim 1, wherein: the total thickness of the silane grafted crosslinked high-density polyethylene extrusion inner sheath layer (3) and the silane grafted crosslinked high-density polyethylene extrusion outer sheath layer (5) is 0.8mm to 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321255825.9U CN219916753U (en) | 2023-05-23 | 2023-05-23 | Extrusion-resistant stretch-proof multi-core flat cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321255825.9U CN219916753U (en) | 2023-05-23 | 2023-05-23 | Extrusion-resistant stretch-proof multi-core flat cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219916753U true CN219916753U (en) | 2023-10-27 |
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ID=88466818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321255825.9U Active CN219916753U (en) | 2023-05-23 | 2023-05-23 | Extrusion-resistant stretch-proof multi-core flat cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219916753U (en) |
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2023
- 2023-05-23 CN CN202321255825.9U patent/CN219916753U/en active Active
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