Photoelectric composite cable

Abstract

The invention specifically discloses a photoelectric composite cable, and relates to the technical field of wires and cables, the photoelectric composite cable comprises a plurality of wire cores, a filling layer, an isolation layer, an armor layer and an outer sheath, the plurality of wire cores are stranded, each wire core comprises an optical fiber composite wire, a copper monofilament, a conductor shielding layer, an insulation layer and an insulation shielding layer, the optical fiber composite wire and the copper monofilament are stranded to form a conductor, the conductor shielding layer is arranged on the peripheral side of the conductor, the insulating layer is arranged on the peripheral side of the conductor shielding layer, the insulating shielding layer is arranged on the peripheral side of the insulating layer, and the conductor shielding layer and the insulating shielding layer are made of graphene composite highly semiconductive shielding materials; the filling layer surrounds the peripheral sides of the plurality of wire cores; the isolating layer is arranged on the peripheral side of the filling layer; the armor layer is arranged on the peripheral side of the isolating layer; according to the photoelectric composite cable provided by the embodiment of the invention, the electric field is more uniform, and the operation reliability and safety are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric wires and cables, and in particular to a photoelectric composite cable. Background Art

[0002] Optoelectronic composite cable is a new type of cable that integrates optical fiber and cable in the same wire harness. It has the ability to transmit optical and electrical signals at the same time and is widely used in the fields of communication and data transmission as well as power systems. However, in the current optoelectronic composite cable, the electric field is not uniform enough, and the reliability and safety of operation are not high. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a photoelectric composite cable, which has a more uniform electric field and significantly improves the reliability and safety of operation.

[0004] According to an embodiment of the present invention, the optoelectronic composite cable includes a core, a filling layer, an isolation layer, an armor layer and an outer sheath. The core is provided with a plurality of cores, and the plurality of cores are twisted. The core includes an optical fiber composite wire, a copper monofilament, a conductor shielding layer, an insulation layer and an insulation shielding layer. The optical fiber composite wire is twisted with the copper monofilament to form a conductor. The conductor shielding layer is arranged on the outer peripheral side of the conductor, the insulation layer is arranged on the outer peripheral side of the conductor shielding layer, and the insulation shielding layer is arranged on the outer peripheral side of the insulation layer. The conductor shielding layer and the insulation shielding layer are made of graphene composite high semi-conductive shielding material; the filling layer surrounds the outer peripheral side of the plurality of cores; the isolation layer is arranged on the outer peripheral side of the filling layer; the armor layer is arranged on the outer peripheral side of the isolation layer; and the outer sheath is arranged on the outer peripheral side of the armor layer.

[0005] The optoelectronic composite cable according to the embodiment of the present invention has at least the following beneficial effects: since the conductor shielding layer is arranged on the outer peripheral side of the conductor, the insulating layer is arranged on the outer peripheral side of the conductor shielding layer, and the insulating shielding layer is arranged on the outer peripheral side of the insulating layer, the conductor shielding layer and the insulating shielding layer are made of graphene composite highly semi-conductive shielding material, and the graphene composite highly semi-conductive shielding material is a mixture of matrix materials such as graphene and metal oxides, which can improve the shielding effect and the homogenized electric field effect, and improve the long-term operation reliability and safety of the optoelectronic composite cable.

[0006] According to an embodiment of the present invention, the insulating layer is made of polypropylene insulating material.

[0007] According to one embodiment of the present invention, the optical fiber composite conductor includes a multimode optical fiber, a stainless steel tube and grease, the multimode optical fiber is arranged in the stainless steel tube, and the grease is filled in the gap between the multimode optical fiber and the stainless steel tube.

[0008] According to an embodiment of the present invention, the wire core further comprises a metal shielding layer, and the metal shielding layer is formed by wrapping a copper tape around the insulating shielding layer.

[0009] According to an embodiment of the present invention, the filling layer includes a plurality of filling ropes, and the plurality of filling ropes are twisted with a plurality of the wire cores.

[0010] According to an embodiment of the present invention, the filling rope is one of a polypropylene filling rope, a low-smoke halogen-free and highly flame-retardant filling rope and a glass fiber filling rope.

[0011] According to an embodiment of the present invention, the isolation layer is made of low-smoke halogen-free polyolefin oxygen barrier material.

[0012] According to an embodiment of the present invention, the armor layer is formed by wrapping a galvanized steel strip around the isolation layer.

[0013] According to an embodiment of the present invention, the outer sheath is made of low-smoke halogen-free flame-retardant polyolefin sheath material.

[0014] According to one embodiment of the present invention, it also includes a protective layer, which is arranged between the armor layer and the outer protective layer, and is formed by wrapping a low-smoke, halogen-free and highly flame-retardant wrapping tape around the outside of the armor layer.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 The figure is a schematic cross-sectional view of an optoelectronic composite cable according to an embodiment of the present invention.

[0018] Reference numerals:

[0019] Photoelectric composite cable 1000;

[0020] Wire core 100; optical fiber composite wire 110; copper monofilament 120; conductor shielding layer 130; insulating layer 140; insulating shielding layer 150; metal shielding layer 160;

[0021] Filling layer 200;

[0022] An isolation layer 300;

[0023] Armor layer 400;

[0024] Outer sheath 500;

[0025] Protective layer 600. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it is necessary to understand that descriptions involving orientations, such as up, down, inside, outside, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] Optoelectronic composite cable is a new type of cable that integrates optical fiber and cable in the same wire harness. It has the ability to transmit optical and electrical signals at the same time and is widely used in the fields of communication and data transmission as well as power systems. However, in the current optoelectronic composite cable, the electric field is not uniform enough, and the reliability and safety of operation are not high.

[0031] To this end, the present invention provides an optoelectronic composite cable 1000, specifically referring to the accompanying drawings of the specification Figure 1 shown.

[0032] Reference Figure 1 As shown, an optoelectronic composite cable 1000 of an embodiment of the present invention includes a core 100, a filling layer 200, an isolation layer 300, an armor layer 400 and an outer sheath 500. The core 100 is provided with a plurality of cores, and the plurality of cores 100 are twisted. It should be noted that twisting is a process of twisting a plurality of single wires together in a certain direction and rule to form a whole, and the mechanical strength and anti-interference ability of the core 100 are improved by twisting.

[0033] Continue to refer to Figure 1As shown, the wire core 100 includes an optical fiber composite wire 110, a copper monofilament 120, a conductor shielding layer 130, an insulating layer 140 and an insulating shielding layer 150. It should be noted that the optical fiber composite wire 110 and the copper monofilament 120 are twisted together to form a conductor. In one embodiment, the copper monofilament 120 is a plurality of strands, and the optical fiber composite wire 110 and the plurality of strands of copper monofilament 120 are twisted together to form a conductor. It can be understood that, through the above arrangement, the anti-interference ability of the conductor is stronger.

[0034] Specific reference Figure 1 As shown, in one embodiment, after the optical fiber composite wire 110 and the multiple copper monofilaments 120 are twisted together to form a conductor, the optical fiber composite wire 110 is located at the center of the conductor. It can be understood that through the above arrangement, with the optical fiber composite wire 110 as the center, the distribution of the multiple copper monofilaments 120 around the optical fiber composite wire 110 is more reasonable, further improving the mechanical strength and anti-interference ability of the wire core 100.

[0035] Reference Figure 1 As shown, it should be noted that the conductor shielding layer 130 is arranged on the outer peripheral side of the conductor, the insulating layer 140 is arranged on the outer peripheral side of the conductor shielding layer 130, and the insulating shielding layer 150 is arranged on the outer peripheral side of the insulating layer 140. In other words, the conductor shielding layer 130, the insulating layer 140 and the insulating shielding layer 150 are arranged in sequence in a direction away from the conductor. It can be understood that through the above arrangement, a good insulation and shielding effect can be achieved for the conductor.

[0036] In one embodiment, the conductor shielding layer 130, the insulating layer 140 and the insulating shielding layer 150 are extruded by a three-layer co-extrusion process. It should be noted that the three-layer co-extrusion technology is a method of simultaneously extruding particles of three different materials through a die head and forming a film. It is understandable that by adopting the three-layer co-extrusion process, the manufacturing time can be significantly shortened and the comprehensive performance of the product can be improved.

[0037] In one embodiment, the cross section of the copper monofilament 120 is a compressed circular shape. In this embodiment, the structure of the copper monofilament 120 is tight and round, which can prevent the conductor shielding layer 130, the insulating layer 140 and the insulating shielding layer 150 from being embedded in the gaps between the multiple copper monofilaments 120 when the three layers are co-extruded, thereby ensuring the roundness of the conductor surface and improving the uniformity of the electric field.

[0038] It should be noted that the conductor shielding layer 130 and the insulating shielding layer 150 are made of graphene composite highly semi-conductive shielding material. It should be noted that the graphene composite highly semi-conductive shielding material is a mixture of graphene and a matrix material. Among them, the matrix material can be a polymer resin, a metal oxide, etc. It should be noted that graphene has extremely high conductivity and mechanical strength, and after graphene is mixed with a matrix material such as a metal oxide, its conductive effect can be improved, thereby enhancing the shielding effect and the homogenized electric field effect of the optoelectronic composite cable 1000, and improving the long-term operation reliability and safety of the optoelectronic composite cable 1000. In addition, the conductor shielding layer 130 and the insulating shielding layer 150 extruded by the graphene composite highly semi-conductive shielding material are smoother.

[0039] Reference Figure 1 As shown, in an optoelectronic composite cable 1000 of an embodiment of the present invention, the insulating layer 140 is made of polypropylene insulating material. It should be noted that in the prior art, cross-linked polyethylene is usually used as the material of the insulating layer 140, but cross-linked polyethylene is a thermosetting material, and the cross-linking process requires a large amount of energy to heat the vulcanized tube, and it is inevitable that a variety of byproducts of cross-linking of peroxide DCP (i.e., diisopropylbenzene peroxide) will be produced, which will pollute the air environment. In addition, during the extrusion molding process of cross-linked polyethylene, it cannot be processed and molded again after high-temperature vulcanization, and thus becomes a large amount of waste. In addition, for cables using cross-linked polyethylene as the insulating layer 140, the insulating layer 140 cannot be recycled and cannot be decomposed on the spot, and is easy to become an environmental pollutant.

[0040] The polypropylene insulation material used as the insulation layer 140 does not need to be cross-linked, so there is no need to use a vulcanized tube for high-temperature heating, which saves energy. At the same time, after the optoelectronic composite cable 1000 is used for a long time, the insulation layer 140 made of the polypropylene insulation material can be recycled by thermoplastic molding again.

[0041] Reference Figure 1 As shown, in an optoelectronic composite cable 1000 according to an embodiment of the present invention, the core 100 also includes a metal shielding layer 160. The metal shielding layer 160 is made of copper tape and is arranged on the outer peripheral side of the insulating shielding layer 150. It can also be understood that the copper tape is wrapped around the insulating shielding layer 150 to form the metal shielding layer 160. In other words, the metal shielding layer 160 is formed by wrapping the copper tape around the insulating shielding layer 150. In one embodiment, the copper tape is wrapped in a continuous overlapping manner, and the wrapping overlap rate is 15% to 25%, thereby improving the shielding effect of the metal shielding layer 160. In one embodiment, the thickness of the copper tape is 0.1 mm, and the conductivity of the copper tape is not less than 0.017593Ω·mm 2 / m.

[0042] It can be understood that, through the above arrangement, since the copper tape has excellent conductivity, the metal shielding layer 160 can shield the electromagnetic field caused by the power supply of the cable within the wire core 100 to reduce the electromagnetic interference to the outside world. At the same time, it also limits the influence of the external electromagnetic field on the inside of the wire core 100. In addition, the electric field can be homogenized to prevent axial discharge.

[0043] Reference Figure 1 As shown, in an optoelectronic composite cable 1000 of an embodiment of the present invention, the optical fiber composite conductor 110 includes a multimode optical fiber, a stainless steel tube and grease. The multimode optical fiber is arranged in the stainless steel tube, and the grease is filled in the gap between the multimode optical fiber and the stainless steel tube. It can be understood that through the above arrangement, the multimode optical fiber can well detect the working state of the copper monofilament 120. It should be noted that the grease is used to prevent the multimode optical fiber from shaking or sliding.

[0044] It should be noted that the multimode optical fiber is provided with an optical fiber sensor unit. In the prior art, the optoelectronic composite cable 1000 generally adds an optical fiber at the cable core to monitor the operation and working temperature of the cable, but the cable core temperature cannot accurately reflect the working temperature of the conductor.

[0045] In an optoelectronic composite cable 1000 of an embodiment of the present invention, the optical fiber composite conductor 110 is twisted with the copper monofilament 120 to form a conductor, so the multimode optical fiber can monitor the hot spot position, current bottleneck position and circuit breaker position of the copper monofilament 120 in real time through the optical fiber sensor unit, and transmit the signal to the terminal, converting the cable current carrying capacity and internal operating temperature into a visual curve graph. At the same time, the warning temperature can be pre-set at the terminal, and an alarm reminder is issued when the temperature of the copper monofilament 120 exceeds the warning temperature, so as to achieve real-time monitoring.

[0046] Reference Figure 1 As shown, in an optoelectronic composite cable 1000 of one embodiment of the present invention, a filling layer 200 surrounds the outer peripheral side of a plurality of cores 100. It is understandable that the filling layer 200 is mainly used to maintain the structural stability of the core 100 and to improve the mechanical strength of the core 100. In one embodiment, the filling layer 200 includes a plurality of filling ropes. Among them, the plurality of filling ropes are twisted with the plurality of cores 100. It is understandable that, through the above arrangement, the plurality of filling ropes are tightly twisted with the plurality of cores 100, further stabilizing the structure of the core 100 and improving the mechanical strength of the core 100.

[0047] It should be noted that the filling rope is one of polypropylene filling rope, low-smoke halogen-free high flame retardant filling rope and glass fiber filling rope. That is to say, in one embodiment, the filling rope is polypropylene filling rope; in another embodiment, the filling rope is low-smoke halogen-free high flame retardant filling rope; in another embodiment, the filling rope is glass fiber filling rope. It should be noted that the glass fiber filling rope is a rope material made of glass fiber as the main raw material, surface treated and twisted by a special machine, and has good flame retardant and high temperature resistance properties.

[0048] Reference Figure 1 As shown, in an optoelectronic composite cable 1000 of an embodiment of the present invention, the isolation layer 300 is arranged on the outer peripheral side of the filling layer 200. It can be understood that the isolation layer 300 can isolate the metal shielding layer 160 and the armor layer 400. In one embodiment, the isolation layer 300 is made of low-smoke halogen-free polyolefin oxygen barrier material, that is, the isolation layer 300 is formed by extruding the low-smoke halogen-free polyolefin oxygen barrier material on the outer peripheral side of the filling layer 200. In one embodiment, the thickness of the isolation layer 300 is 1.5 mm to 2.5 mm.

[0049] It should be noted that the low-smoke halogen-free polyolefin oxygen barrier material is a material made of polyolefin as the main raw material, by adding special halogen-free and non-toxic flame retardants, smoke suppressants and other additives, and processed through a special mixing process. Its main features include good softness, high oxygen index, low smoke, halogen-free, green and environmentally friendly, and reusable. It can be understood that through the above settings, the isolation layer 300 meets environmental protection requirements.

[0050] Reference Figure 1 As shown, in an optoelectronic composite cable 1000 of an embodiment of the present invention, the armor layer 400 is arranged on the outer peripheral side of the isolation layer 300. It can be understood that the armor layer 400 mainly plays a protective role for the internal structure. In one embodiment, the armor layer 400 is formed by wrapping a galvanized steel strip around the isolation layer 300. It can also be understood that the galvanized steel strip is wrapped around the isolation layer 300 to form the armor layer 400. It should be noted that the galvanized steel strip is wrapped with a double layer of gap overlap, and the gap rate of each layer is not more than 50%. It can be understood that through the above arrangement, the protective effect of the armor layer 400 is better.

[0051] Reference Figure 1As shown, in an optoelectronic composite cable 1000 of an embodiment of the present invention, the outer sheath 500 is arranged on the outer peripheral side of the armor layer 400. It can be understood that the outer sheath 500 mainly plays the role of protecting the internal structure. In one embodiment, the outer sheath 500 is made of low-smoke halogen-free flame-retardant polyolefin sheath material, that is, the outer sheath 500 is formed by extruding the low-smoke halogen-free flame-retardant polyolefin sheath material. In one embodiment, the extrusion thickness is 1.8mm to 3.5mm, and the oxygen index is not less than 40%. It should be noted that the low-smoke halogen-free flame-retardant polyolefin sheath material has low-smoke halogen-free characteristics, flame retardant properties, and environmental protection, and is an ideal material for the outer sheath 500.

[0052] Reference Figure 1 As shown, an optoelectronic composite cable 1000 of an embodiment of the present invention further includes a protective layer 600. The protective layer 600 is arranged between the armor layer 400 and the outer sheath 500, and the protective layer 600 is formed by wrapping the low-smoke halogen-free high flame retardant wrapping tape around the outside of the armor layer 400. In one embodiment, the low-smoke halogen-free high flame retardant wrapping tape is wrapped in a continuous overlapping manner, with an overlapping rate of 15% to 20% and a nominal thickness of 0.2 mm. It should be noted that the protective layer 600 mainly plays two roles. One is to improve the flame retardant performance of the optoelectronic composite cable 1000 and prevent the flame from spreading along the extension direction of the optoelectronic composite cable 1000. The second is to protect the outer sheath 500 to prevent the outer sheath 500 from cracking due to friction between the galvanized steel strip of the armor layer 400 and the outer sheath 500 during the bending process of the optoelectronic composite cable 1000.

[0053] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. Photoelectric composite cable, characterized in that: include: A wire core, provided with a plurality of wire cores, the plurality of wire cores are twisted, the wire core comprises an optical fiber composite wire, a copper monofilament, a conductor shielding layer, an insulating layer and an insulating shielding layer, the optical fiber composite wire and the copper monofilament are twisted to form a conductor, the conductor shielding layer is arranged on the outer peripheral side of the conductor, the insulating layer is arranged on the outer peripheral side of the conductor shielding layer, the insulating shielding layer is arranged on the outer peripheral side of the insulating layer, and the conductor shielding layer and the insulating shielding layer are made of graphene composite high semi-conductive shielding material; A filling layer, surrounding the outer circumference of the plurality of wire cores; An isolation layer, disposed on the outer peripheral side of the filling layer; An armor layer, arranged on the outer peripheral side of the isolation layer; The outer protective layer is arranged on the outer peripheral side of the armor layer.

2. The optoelectronic composite cable according to claim 1, characterized in that: The insulating layer is made of polypropylene insulating material.

3. The optoelectronic composite cable according to claim 1, characterized in that: The optical fiber composite conductor comprises a multimode optical fiber, a stainless steel tube and grease. The multimode optical fiber is arranged in the stainless steel tube, and the grease is filled in the gap between the multimode optical fiber and the stainless steel tube.

4. The optoelectronic composite cable according to claim 1, characterized in that: The wire core further comprises a metal shielding layer, wherein the metal shielding layer is formed by wrapping a copper tape around the insulating shielding layer.

5. The optoelectronic composite cable according to claim 1, characterized in that: The filling layer includes a plurality of filling ropes, and the plurality of filling ropes are twisted with a plurality of the wire cores.

6. The optoelectronic composite cable according to claim 5, characterized in that: The filling rope is one of a polypropylene filling rope, a low-smoke halogen-free high flame retardant filling rope and a glass fiber filling rope.

7. The optoelectronic composite cable according to claim 1, characterized in that: The isolation layer is made of low-smoke halogen-free polyolefin oxygen-isolating material.

8. The optoelectronic composite cable according to claim 1, characterized in that: The armor layer is formed by wrapping a galvanized steel strip around the isolation layer.

9. The optoelectronic composite cable according to claim 1, characterized in that: The outer sheath is made of low-smoke, halogen-free, flame-retardant polyolefin sheath material.

10. The optoelectronic composite cable according to claim 1, characterized in that: It also includes a protective layer, which is arranged between the armor layer and the outer protective layer, and is formed by wrapping a low-smoke, halogen-free and highly flame-retardant wrapping tape around the armor layer.

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