High-flexibility reel cable

Abstract

The utility model discloses a high-flexibility reel cable, which comprises an outer protective layer, an outer buffer layer and a plurality of wire units, the outer buffer layer is coated outside all the wire units, and the outer protective layer is coated outside the outer buffer layer. Each wire unit comprises a central traction bundle, a conductor buffer layer wrapping the central traction bundle, wire bundle conductors and an insulating layer wrapping the wire bundle conductors, and the wire bundle conductors are twisted into a whole around the conductor buffer layer. The beneficial effects of the utility model are that through improving the structure of the cable conductor, the flexibility of the cable is improved, the wire breaking risk of the conductor is reduced, and the cable can be ensured to operate safely and dynamically for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of reel cables, in particular to a high-flexibility reel cable. Background Art

[0002] Drum cables have important applications in various industrial and commercial scenarios. On construction sites, drum cables are often used to connect power, lighting, and other equipment. They are also widely used in equipment such as cranes, automated production lines, and dock machinery to provide power and signal transmission for these devices. On ships and ship docks, drum cables are used to connect shore power and ship power grids to provide power and electricity for ships.

[0003] Compared with conventional cables, reel cables are in dynamic operation for a long time, so the conductors of reel cables generally use Category 5 or 6 twisted soft structure copper conductors. The cable needs to move with the equipment and it is difficult to avoid friction or collision with other objects, so the outer sheath needs to have requirements such as wear resistance, extrusion resistance, oil resistance, and corrosion resistance.

[0004] The existing twisted structure conductor is prone to wire breakage due to metal fatigue after long-term bending. After the wire is broken, the conductor resistance increases, which is prone to safety accidents.

[0005] In the Chinese patent literature, a low-smoke halogen-free environmentally friendly reel cable with authorization announcement number CN215896025U, which was authorized and announced on February 22, 2022, includes a winding layer, a shielding layer and an outer sheath layer concentrically arranged from the inside to the outside, and three wire cores are arranged in the winding layer and are equidistantly distributed along the circumference of the winding layer. The wire cores all include core conductors, and the core conductors are extruded with an insulating layer. Each insulating layer is tangent to the winding layer and tangent to every two adjacent insulating layers. A steel wire load-bearing unit is arranged between every two adjacent insulating layers and the winding layer, and the steel wire load-bearing units are respectively tangent to the winding layer and the insulating layer. A number of protruding structures are arranged outside the outer sheath layer and are equidistantly distributed along the circumference of the outer sheath. The protruding structures are arranged axially along the outer sheath and are an integral structure with the outer sheath. This application attempts to reduce the deformation of the drum cable under traction by providing a steel wire load-bearing unit, but its reinforcement effect is for the drum cable as a whole, and the reinforcement effect on the twisted structure conductor inside the drum cable is poor, and the conductor still has a greater risk of breakage. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art that the reel cable is prone to safety accidents after long-term bending, the utility model provides a high-flexibility reel cable, which improves the structure of the cable conductor, improves the flexibility of the cable, reduces the risk of conductor breakage, and ensures the safe long-term dynamic operation of the cable.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] During the process of the cable being put into the reel, the cable bends and deforms. At the same time, during the bending process, the outer part of the conductor will be subjected to a tensile force, and the inner side of the conductor will be subjected to an extrusion force. As the cable is continuously straightened and bent for a long time, due to metal fatigue, some of the single wires in the twisted conductor will break, resulting in increased resistance, heating and aging of the cable, which will cause safety hazards. This application sets a central traction bundle and a conductor buffer layer with a buffering function at the center of the conductor. When the outer conductor is stretched, part of the tensile force will be absorbed by the conductor buffer layer. Similarly, part of the extrusion force of the inner conductor outward will be absorbed by the conductor buffer layer, thereby reducing the deformation of the conductor during the bending process and reducing the internal stress of the conductor; the central traction bundle ensures that the conductor is not stretched during the dragging process of the cable; the bundled wire conductor uses smaller single wire bundles to be wound into strands, and each strand of the bundled wire conductor is then evenly twisted outside the conductor buffer layer to form a tensile-resistant and soft conductor with the central traction bundle and the conductor buffer layer. Through the design of the conductor structure, the bending resistance, tensile resistance and stability of the conductor are improved.

[0009] Preferably, the central traction bundle is a carbon fiber bundle. Carbon fiber has high tensile strength and strong fatigue resistance. During the cable towing process, the carbon fiber bundle absorbs the tension, thereby extending the service life of the cable.

[0010] Preferably, the conductor buffer layer is a foamed polyethylene layer covering the periphery of the central traction bundle. The foamed polyethylene has good heat resistance and resilience. When the cable is bent, the outer conductor monofilament is affected by tension, and the conductor buffer layer can offset part of the tension.

[0011] Preferably, the insulating layer is uniformly extruded on the surface of the conductor. Polyvinyl chloride is soft and has excellent insulating properties.

[0012] Preferably, the outer buffer layer is a fiber composite tape layer. The fiber composite tape layer has the characteristics of both softness and high strength, and plays a buffering role when the cable is squeezed or collided, and is mainly used to protect the insulation layer.

[0013] Preferably, the outer sheath is a polyurethane layer, and the outer sheath is evenly extruded on the outer side of the outer buffer layer. The outer sheath has the characteristics of oil resistance, acid and alkali resistance, wear resistance, good toughness, water resistance, cold resistance, etc., and can reliably protect the cable.

[0014] Preferably, several conductor units are arranged in parallel and coplanarly to form a flat cable structure. The bending radius of a round drum cable is larger than that of a flat cable, and a drum device with a larger diameter is required, which takes up a lot of space. The flat structure can improve the space utilization of the drum device.

[0015] These features and advantages of the present invention will be disclosed in detail in the following specific implementation manners and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0017] Figure 1 It is a structural schematic diagram of a highly flexible reel cable proposed in one embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of a highly flexible reel cable when it is bent, according to one embodiment of the utility model;

[0019] Figure 3 It is a structural schematic diagram of a highly flexible reel cable proposed in another embodiment of the utility model.

[0020] In the figure: outer sheath 1, outer buffer layer 2, conductor unit 3, central traction bundle 301, conductor buffer layer 302, bundle conductor 303, insulation layer 304. DETAILED DESCRIPTION

[0021] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0022] In the description of this embodiment, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "back", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore, cannot be understood as a limitation on the utility model. In addition, if the terms "first", "second", and "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] Figure 1 and Figure 2 As shown, a highly flexible reel cable proposed in one embodiment of the utility model includes an outer sheath 1, an outer buffer layer 2 and a plurality of conductor units 3, the outer buffer layer 2 is coated on the outside of all conductor units 3, the outer sheath 1 is coated on the outside of the outer buffer layer 2, the conductor unit 3 includes a central traction bundle 301, a conductor buffer layer 302 coating the central traction bundle 301, a bundle conductor 303 and an insulating layer 304 coating the bundle conductor 303, the bundle conductor 303 is provided with a plurality of bundle conductors 303 and the plurality of bundle conductors 303 are twisted into a whole around the conductor buffer layer 302.

[0024] When the cable is put into the reel, it bends and deforms. At the same time, the outer part of the conductor is subjected to a tensile force, and the inner part of the conductor is subjected to a squeezing force. As the cable is straightened and bent continuously for a long time, some of the single wires in the twisted conductor will break due to metal fatigue, resulting in increased resistance, heating and aging of the cable, which will cause safety hazards. Figure 2 As shown, the present application arranges a central traction bundle 301 and a conductor buffer layer 302 with a buffering function at the center position of the conductor. When the outer conductor is stretched, part of the stretching force will be absorbed by the conductor buffer layer 302. Similarly, part of the outward extrusion force of the inner conductor will be absorbed by the conductor buffer layer 302, thereby reducing the deformation of the conductor during the bending process and reducing the internal stress of the conductor; the central traction bundle 301 ensures that the conductor is not stretched during the dragging of the cable.

[0025] As one of the embodiments of the present invention, a highly flexible reel cable is provided. Figure 1 As shown, the bundled wire conductor 303 is provided with six strands, and the six strands of bundled wire conductors 303 are arranged in a circular array around the central traction bundle 301. The bundled wire conductor 303 is wound into strands using smaller monofilament bundles, and each strand of bundled wire conductor 303 is then evenly twisted outside the conductor buffer layer 302 to form a tensile and flexible conductor with the central traction bundle 301 and the conductor buffer layer 302. The bending resistance, tensile strength and stability of the conductor are improved by designing the conductor structure. It can be understood by those skilled in the art that the number of bundled wire conductors 303 can be replaced by other numbers.

[0026] As one of the embodiments of the utility model, the high-flexibility reel cable proposed, the center traction bundle 301 is a carbon fiber bundle. The conductor buffer layer 302 is a foamed polyethylene layer covering the outer periphery of the center traction bundle 301. The insulating layer 304 is evenly extruded on the surface of the conductor. The outer buffer layer 2 is a fiber composite tape layer. The outer sheath 1 is a polyurethane layer. The carbon fiber has high tensile strength and strong fatigue resistance. During the dragging process of the cable, the carbon fiber bundle absorbs the tension, thereby extending the service life of the cable. The foamed polyethylene has good heat resistance and resilience. During the bending process of the cable, the outer conductor monofilament is affected by tension, and the conductor buffer layer 302 can offset part of the tension. Polyvinyl chloride is soft and has excellent insulation properties. The fiber composite tape layer has the characteristics of both softness and high strength. When the cable is squeezed or collided, it plays a buffering role and is mainly used to protect the insulating layer 304. The outer sheath is evenly extruded on the outside of the outer buffer layer 2. The polyurethane material has good electrical properties, weather resistance, bending performance, acid and alkali resistance, oil resistance, etc., and has the mechanical properties, wear resistance, high flexibility and other characteristics of rubber, and the processing technology is simple, and no vulcanization is required, so that the outer sheath 1 has the characteristics of oil resistance, acid and alkali resistance, wear resistance, good toughness, water resistance, cold resistance, etc., and can reliably protect the cable.

[0027] As one of the embodiments of the present invention, a highly flexible reel cable is provided. Figure 1 As shown, several conductor units 3 are arranged in parallel and coplanarly so that the cable forms a flat structure. In this embodiment, three conductor units 3 are provided, and the three conductor units 3 are arranged side by side to form a flat structure. The reel device has high space utilization and high integration performance after the cable is stored.

[0028] As a simple replacement of the above solution, the number of the wire units 3 can be two, four or other different numbers.

[0029] As one of the embodiments of the present invention, a highly flexible reel cable is provided. Figure 3 As shown, several conductor units 3 are arranged in parallel and distributed in a circumferential array so that the cable forms a circular structure. Another form of cable arrangement.

[0030] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention shall be included in the scope of the claims.

Claims

1. A highly flexible reel cable, characterized in that: It includes an outer sheath, an outer buffer layer and a plurality of conductor units. The outer buffer layer is coated on the outside of all conductor units, and the outer sheath is coated on the outside of the outer buffer layer. The conductor unit includes a central traction bundle, a conductor buffer layer coating the central traction bundle, a bundled wire conductor and an insulating layer coating the bundled wire conductor. A plurality of bundled wire conductors are provided and the plurality of bundled wire conductors are twisted into a whole around the conductor buffer layer.

2. A highly flexible reel cable according to claim 1, characterized in that: The central traction bundle is a carbon fiber bundle.

3. A highly flexible reel cable according to claim 1, characterized in that: The conductor buffer layer is a foamed polyethylene layer covering the periphery of the central traction beam.

4. A highly flexible reel cable according to claim 1, characterized in that: The insulating layer is uniformly extruded on the surface of the conductor.

5. A highly flexible reel cable according to claim 1, characterized in that: The outer buffer layer is a fiber composite tape layer.

6. A highly flexible reel cable according to claim 1, characterized in that: The outer protective layer is a polyurethane layer, and the outer protective layer is evenly extruded and wrapped on the outer side of the outer buffer layer.

7. A highly flexible reel cable according to any one of claims 1 to 6, characterized in that: The plurality of conductor units are arranged in parallel and distributed in the same plane so that the cable forms a flat structure.

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