High-flexibility industrial cable

Abstract

The utility model relates to a high-flexibility industrial cable which sequentially comprises a sheath layer, a total shielding wrapping layer, a total shielding layer, a cabling wrapping layer and an inner core from outside to inside. A filling layer is arranged between the cabling wrapping layer and the inner core. The inner core sequentially comprises a sub-shielding wrapping layer, a sub-shielding layer, a twisted wrapping layer and a cable core from outside to inside; the cable core comprises a conductor and an insulating layer arranged outside the conductor; and a filling layer is arranged between the pair-twisted wrapping layer and the insulating layer. The performance of the cable is effectively improved through the cooperation of the sheath layer and the cable structure, and the bending resistance of the cable is enhanced through combining the plurality of ultra-fine oxygen copper bundles into the conductor; and the shielding layer is formed by weaving copper strips or copper wires, so that the signal transmission anti-interference capability of the whole cable is better. Through the filling layer, the cable can be tightly and compactly cabled, the flexibility and the anti-interference capability of the cable are improved, and the cable is convenient to install and use.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a highly flexible industrial cable. Background Art

[0002] The statements herein only provide background art related to the utility model and do not necessarily constitute prior art.

[0003] Cables, as important carriers for power and signal transmission, play an indispensable role in the automation industry. They are mainly used to transmit power or signals from one place to another, and their basic structure includes a conductor, an insulating layer, and a protective layer. With the rapid development of industrial automation, from single-machine control to full upgrades in factory automation and then to system automation, the performance requirements for cables are also increasing day by day. Especially for cables in special automation equipment, they often have to face harsh environments such as low temperature and oil contamination, which pose severe challenges to the bending, anti-fatigue, oil resistance, and other performances of the cables. The external parts of traditional cables are mostly made of polyvinyl chloride and polyethylene. Although they have certain mechanical strength, the wear resistance, oil resistance, low-temperature resistance, and aging resistance of simple polyvinyl chloride and polyethylene cables cannot meet the usage requirements of special automation equipment. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a highly flexible industrial cable, which sequentially includes a sheath layer, a total shielding wrapping layer, a total shielding layer, a stranding wrapping layer, and an inner core from outside to inside; a filling layer is also provided between the stranding wrapping layer and the inner core;

[0005] The inner core sequentially includes a sub-shielding wrapping layer, a sub-shielding layer, a twisted pair wrapping layer, and a cable core from outside to inside; the cable core includes a conductor and an insulating layer arranged outside the conductor; a filling layer is also provided between the twisted pair wrapping layer and the insulating layer.

[0006] As a further technical solution, the inner core includes a first inner core and a second inner core, and two of each are provided.

[0007] As a further technical solution, the first inner core contains two cable cores, and the second inner core contains three cable cores.

[0008] As a further technical solution, the conductor is composed of a stranded bundle of multi-strand ultra-fine oxygen-free copper conductors.

[0009] As a further technical solution, the insulating layer is made of a silane cross-linked polyethylene insulating material of 3 kV and below.

[0010] As a further technical solution, the filling layer is composed of a polypropylene mesh tear film.

[0011] As a further technical solution, the partial shielding layer is formed by single-layer overlapping winding of copper tape or braiding of copper wires.

[0012] As a further technical solution, the overall shielding layer is formed by single-layer overlapping winding of copper tape or braiding of copper wires, and the partial shielding layer and the overall shielding layer should adopt the same shielding method.

[0013] As a further technical solution, the twisted winding layer, the partial shielding winding layer, the cabling winding layer, and the overall shielding winding layer are made of polyester tape material for cables.

[0014] As a further technical solution, the material of the sheath layer is black flame-retardant polyvinyl chloride sheath material with an oxygen index greater than or equal to 28 or thermoplastic polyether elastomer.

[0015] Advantages of the above one or more technical solutions:

[0016] (1) The material of the sheath layer is black flame-retardant polyvinyl chloride sheath material with an oxygen index ≥28. Compared with general materials, using this material as the sheath layer can make the cable better meet the flame-retardant performance, with good oil resistance, bending resistance, and excellent wear resistance. The material of the sheath layer is thermoplastic polyether elastomer (TPU elastomer) material, which has excellent wear resistance, oil resistance, low-temperature resistance, and aging resistance.

[0017] (2) For this high-flexibility industrial cable, by using oxygen-free copper strands to form the conductor, and each specification of cable core is stranded with different stranding pitches, the bending performance and anti-interference performance of the cable are excellent, and the tensile strength of the cable is increased. At the same time, through the cooperation of the shielding layer and the winding layer, the cable core is made more compact and firm, and the conductor is not easily broken.

[0018] (3) For this high-flexibility industrial cable, by adding partial shielding layers to the first inner core and the second inner core respectively, on the premise of maintaining the signal transmission performance, the signal transmission is more complete, stable, and anti-interference. Adding an overall shielding layer to the cable after cabling winding enables the cable to be competent for the precise data signal transmission function, and better ensures the compatibility of the applicable range of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The schematic diagram of the drawings forming a part of this application is used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation to this application.

[0020] Figure 1 It is a schematic diagram of the cross-sectional structure of the cable with single-layer overlapping winding adopted by the present utility model.

[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of the cable with copper wire braided shielding adopted by the present utility model.

[0022] In the figure, 1 is a conductor; 2 is an insulating layer; 3 is a filling layer; 4 is a twisted wrapping layer; 5 is a partial shielding layer; 6 is a partial shielding wrapping layer; 7 is a cable laying wrapping layer; 8 is a total shielding layer; 9 is a total shielding wrapping layer; 10 is a sheath layer; 11 is a first inner core; 12 is a second inner core; 13 is a cable core. Specific embodiments

[0023] The following combines the attached Figure 1-2 , to illustrate the specific implementation of this embodiment.

[0024] The embodiment of the present application provides a highly flexible industrial cable. Referring to Figure 1 , a highly flexible industrial cable includes, from outside to inside in sequence, a sheath layer 10, a total shielding wrapping layer 9, a total shielding layer 8, a cable laying wrapping layer 7, and an inner core; the inner core includes, from outside to inside in sequence, a partial shielding wrapping layer 6, a partial shielding layer 5, a twisted wrapping layer 4, and a cable core 13; the cable core 13 includes a conductor 1 and an insulating layer 2 provided outside the conductor 1;

[0025] It should be clear that the materials appearing in this embodiment are all existing materials, and the present application does not improve the materials themselves. In this embodiment, the material of the sheath layer 10 is a black flame-retardant polyvinyl chloride sheath material with an oxygen index greater than or equal to 28. The above material can improve the flame retardancy, oil resistance, low temperature resistance, weather resistance, wear resistance, tensile strength, and flexibility of the cable, so that the whole cable has good flexibility and high tensile strength. Using polyester tape material for cables as the total shielding wrapping layer 9, the cable laying wrapping layer 7, the partial shielding wrapping layer 6, and the twisted wrapping layer 4 can effectively prevent the internal structure of the cable from loosening, improve the mechanical and physical properties of the cable, and effectively protect the conductor 1.

[0026] Furthermore, in this embodiment, the inner core includes a first inner core 11 and a second inner core 12. There are two first inner cores 11 and two second inner cores 12, and the first inner core 11 and the second inner core 12 are arranged at circumferential intervals along the cable axis. Among them, the first inner core 11 contains two cable cores 13, and the second inner core 12 contains three cable cores 13. By setting different numbers of cable cores 13, the current-carrying capacity of the inner core is also different, enabling the cable to be applicable to different current-carrying demand scenarios. The conductor 1 in the cable core 13 is composed of a multi-strand ultra-fine oxygen-free copper bundle. The diameter of the oxygen-free copper is 0.10 - 0.30 mm. The oxygen-free copper has high electrical conductivity, good processing performance, excellent corrosion resistance and low-temperature performance. By bundling multiple ultra-fine oxygen-free copper strands into the fifth type of soft copper conductor, the conductor is soft and easy to bend, and the bending resistance performance is enhanced, reducing the possibility of short circuit and open circuit of the cable due to bending. The insulation layer 2 outside the conductor 1 is made of a silane cross-linked polyethylene insulating material with a voltage of 3 kV or less. The silane cross-linked polyethylene insulating material has high strength, strong anti-aging property, corrosion resistance, and good stability and durability in high-temperature and high-humidity environments. Among them, the conductor 1 and the insulation layer 2 are covered and connected through an extrusion process and are twisted to form twisted pairs. This process can fully cover the conductor with insulation, and the insulation is uniform without quality problems. Moreover, it increases the flexibility of the cable and enhances the anti-interference ability.

[0027] Furthermore, a filling layer 3 is also provided between the stranding wrapping layer 7 and the inner core and between the twisting wrapping layer 4 and the insulation layer 2. The filling layer 3 is composed of a polypropylene mesh tearing film. The polypropylene mesh tearing film has characteristics such as good flame retardancy, low smoke density, non-toxic, non-hygroscopic, non-mildewing, non-corrosive, soft, and strong tensile strength, and can improve the mechanical buffering effect and anti-impact and extrusion performance of the cable.

[0028] Furthermore, the total shielding layer 8 and the partial shielding layer 6 are wound with a single layer of copper tape overlapping, and the overlapping rate is controlled at 15% - 25%. In addition, a copper wire is added under the copper tape after winding, and the copper wire is in close contact with the copper tape, which can make the cable soft and easy to lay, and increase the anti-interference ability.

[0029] Combined with Figure 2 , the sheath layer 10 can also adopt a thermoplastic polyether elastomer (TPU elastomer) material, which can enable the cable to better meet the requirements of wear resistance, oil resistance, low temperature resistance, corrosion resistance, acid and alkali resistance, bending resistance, anti-fatigue, high strength and environmental protection performance. The total shielding layer 8 and the partial shielding layer 5 can also adopt a copper wire braided shield, and the copper wire is made of soft copper wire, and the density of the braided layer should not be less than 80%. Similarly, it can make the cable soft and easy to lay, and can increase its anti-interference ability.

[0030] Although the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, they are not intended to limit the protection scope of the present invention. Those skilled in the art should understand that various modifications or deformations that can be made without creative efforts on the basis of the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A highly flexible industrial cable, characterized in that: It includes a sheath layer, a total shielding wrapping layer, a total shielding layer, a cabling wrapping layer and an inner core in order from the outside to the inside; a filling layer is also provided between the cabling wrapping layer and the inner core; The inner core comprises a sub-shielding wrapping layer, a sub-shielding layer, a twisted wrapping layer and a cable core from the outside to the inside; the cable core comprises a conductor and an insulating layer arranged outside the conductor; a filling layer is also arranged between the twisted wrapping layer and the insulating layer.

2. A highly flexible industrial cable as claimed in claim 1, characterized in that: The inner core includes a first inner core and a second inner core, and two of the first inner core and the second inner core are provided.

3. A highly flexible industrial cable as claimed in claim 2, characterized in that: The first inner core includes two cable cores, and the second inner core includes three cable cores.

4. A highly flexible industrial cable as claimed in claim 1, characterized in that: The conductor is formed by bundling a plurality of extremely fine oxygen-free copper conductors.

5. A highly flexible industrial cable as claimed in claim 1, characterized in that: The insulating layer is made of 3kV and below silane cross-linked polyethylene insulating material.

6. A highly flexible industrial cable as claimed in claim 1, characterized in that: The filling layer is made of a polypropylene mesh tear film.

7. A highly flexible industrial cable as claimed in claim 1, characterized in that: The sub-shielding layer is wrapped with a single layer of overlapping copper tape or braided with copper wire.

8. A highly flexible industrial cable as claimed in claim 1, characterized in that: The overall shielding layer is wrapped with a single layer of copper tape in overlapping manner or braided with copper wires, and the sub-shielding layers and the overall shielding layer adopt the same shielding method.

9. A highly flexible industrial cable as claimed in claim 1, characterized in that: The twisted pair wrapping layer, the separate shielding wrapping layer, the cabling wrapping layer and the overall shielding wrapping layer are made of polyester tape material for cables.

10. A highly flexible industrial cable as claimed in claim 1, characterized in that: The sheath layer is made of a black flame-retardant polyvinyl chloride sheath material or a thermoplastic polyether elastomer with an oxygen index greater than or equal to 28.

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