CN114300191A - Self-shielding low-crosstalk photoelectric hybrid cable - Google Patents
Self-shielding low-crosstalk photoelectric hybrid cable Download PDFInfo
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- CN114300191A CN114300191A CN202111414160.7A CN202111414160A CN114300191A CN 114300191 A CN114300191 A CN 114300191A CN 202111414160 A CN202111414160 A CN 202111414160A CN 114300191 A CN114300191 A CN 114300191A
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Abstract
The invention provides a self-shielding low crosstalk photoelectric hybrid cable, which comprises a cable core, and an outer shielding layer and an outer sheath which are sequentially coated on the outer side of the cable core from inside to outside; the cable core comprises an optical communication unit and a plurality of data communication units arranged at the periphery of the optical communication unit, each optical communication unit is coated by a belting layer, an inner shielding structure is coated on the outer side of the belting layer, an inner sheath is coated on the outer side of the inner shielding structure, and the data communication units are embedded into the inner sheath. The invention has compact structure and reasonable design, a plurality of groups of optical communication units are uniformly distributed around the central reinforcing part, each optical communication unit is independently shielded by a self-shielding layer structure, and each optical communication unit is tightly wrapped by the wrapping tape layer, so the invention has good integrity and high stability.
Description
Technical Field
The invention belongs to the technical field of cable design and manufacture, and particularly relates to a self-shielding low-crosstalk photoelectric hybrid cable.
Background
A large amount of laying and using of the 5G base station bring very wide market prospect for the photoelectric hybrid cable. The access network optical-electric hybrid cable is mostly used for outdoor horizontal arrangement, a cable core structure can contain communication wire pairs, 2 pairs or 4 pairs are generally selected as communication metal wire pairs in the cable, and for crosstalk between the wire pairs, essentially, because electromagnetic coupling exists between two loops, the interference magnitude is related to the relative position and structure between the loops. With the increase of frequency, both the electric coupling and the magnetic coupling increase, and the near-end crosstalk is generally more serious than the far-end crosstalk at high frequency, and the conventional optical/electrical hybrid cable generally only arranges a shielding layer in the protective layer, and cannot reduce the crosstalk well. Therefore, there is a need for improved structures for hybrid fiber optic cables.
Disclosure of Invention
In view of the above, the present invention provides a self-shielding low crosstalk optical/electrical hybrid cable to overcome the drawbacks of the prior art.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a self-shielding low crosstalk photoelectric hybrid cable comprises a cable core, and an outer shielding layer and an outer sheath which are sequentially coated on the outer side of the cable core from inside to outside; the cable core comprises an optical communication unit and a plurality of data communication units at the periphery of the optical communication unit, each optical communication unit is coated by a belting layer, an inner shielding structure is coated on the outer side of the belting layer, an inner sheath is coated on the outer side of the inner shielding structure, and the data communication units are embedded into the inner sheath; the optical communication unit comprises a central reinforcing structure and a plurality of groups of optical fiber ribbons on the periphery of the central reinforcing structure, and the outer side of each optical fiber ribbon is independently coated with a self-shielding layer; and filling materials are filled in gaps among the optical fiber ribbons.
Furthermore, the data communication unit is evenly distributed with 4 groups by taking a central reinforcing piece as a center.
Further, the outer sheath is a chlorinated polyethylene flame-retardant sheath.
Further, the central reinforcing structure comprises a central reinforcing member, and a central protective layer is coated on the periphery of the central reinforcing member.
Furthermore, the central reinforcing part is made of glass fiber, polyester aramid fiber yarn or steel wire.
Further, the central sheath layer adopts a copper wire braided layer.
Furthermore, the filling material is made of glass fiber materials, polypropylene materials or hemp ropes.
Compared with the prior art, the invention has the following advantages:
the invention has reasonable structural design, a plurality of groups of optical communication units are uniformly distributed around the central reinforcing piece, each optical communication unit is independently shielded by a self-shielding layer structure and then shielded by an inner shielding structure at the outer side, each data communication unit is uniformly distributed at the periphery of the optical communication unit, and an outer shielding layer is arranged at the outer side of the data communication unit.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the invention without limitation. In the drawings:
FIG. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic view of the invention with the outer reinforcement disposed within the inner jacket;
FIG. 3 is a schematic view of the inventive peripheral rib disposed on the outer jacket.
Detailed Description
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
The invention will be described in detail with reference to the following embodiments with reference to the attached drawings.
A self-shielding low crosstalk photoelectric hybrid cable is shown in figures 1 to 3 and comprises a cable core, and an outer shielding layer 1 and an outer sheath 2 which are sequentially coated on the outer side of the cable core from inside to outside. Usually, the outer sheath is a chlorinated polyethylene flame-retardant sheath. The cable core comprises an optical communication unit 3 and a plurality of data communication units 4 at the periphery of the optical communication unit, each optical communication unit is covered by a belting layer 5, an inner shielding structure 6 is covered at the outer side of the belting layer, and an inner sheath 7 is covered at the outer side of the inner shielding structure. The belting layer wraps each optical communication unit tightly, and has good integrity and high stability. By way of example, the inner shielding structure uses a tinned copper wire braided shielding layer.
The data communication unit is embedded into the inner sheath; the optical communication unit comprises a central reinforcing structure and a plurality of groups of optical fiber ribbons 11 on the periphery of the central reinforcing structure, and the outer side of each optical fiber ribbon is independently coated with a self-shielding layer 8; the central reinforcing structure comprises a central reinforcing member 9, which is surrounded by a central sheath 10. In an alternative embodiment, the central sheath is a braided copper wire layer. Generally, the braid density of the copper wire braid is not less than 90%.
In order to improve the stability of the optical communication units, in an alternative embodiment, the gap between the optical fiber ribbons is filled with a filler material. The filling material is made of glass fiber materials, polypropylene materials or hemp ropes, and the cable core is better in overall stability. Simultaneously, in an optimal solution, the thickness direction of each optical fiber ribbon all arranges along the radial of central reinforcement for this mixed cable of photoelectricity holistic bending resistance, torsion resistance promote by a wide margin.
For example, the data communication units are uniformly distributed with 4 groups by taking the central reinforcing piece as the center. Typically, the central reinforcing member is made of glass fiber, aramid fiber or steel wire. In an alternative embodiment, several peripheral reinforcing elements 12 are provided in the inner sheath, typically spaced apart from the data communication units, i.e. a peripheral reinforcing element is arranged between two adjacent data communication units, each peripheral reinforcing element being arranged evenly centred on the central reinforcing element. The distance from the outer edge of the peripheral reinforcing member to the outer shielding layer is smaller than the distance from the outer edge of the data communication unit to the outer shielding layer, namely, the data communication unit is within the protection range of the peripheral reinforcing member. When the data communication unit is extruded or impacted by external force, the peripheral reinforcing piece can bear corresponding load action before the data communication unit, so that the peripheral reinforcing piece can effectively form reliable protection for the data communication unit.
In another optional embodiment, a plurality of peripheral reinforcing members are arranged in the outer sheath, a peripheral reinforcing member is correspondingly arranged between two adjacent data communication units, and the peripheral reinforcing members are uniformly distributed by taking the central reinforcing member as the center, so that the data communication units are ensured to be within the protection range of the peripheral reinforcing members, and the peripheral reinforcing members can protect the whole cable core.
Usually, the outer sheath is a chlorinated polyethylene flame-retardant sheath, so that the cable has excellent high-temperature resistance, fatigue resistance, wear resistance, irradiation resistance and corrosion resistance, is good in flame retardance and chemical stability, and can prolong the service life of the cable.
The invention has reasonable structural design, a plurality of groups of optical communication units are uniformly distributed around the central reinforcing piece, each optical communication unit is independently shielded by a self-shielding layer structure and then shielded by an inner shielding structure at the outer side, each data communication unit is uniformly distributed at the periphery of the optical communication unit, and an outer shielding layer is arranged at the outer side of the data communication unit. Especially in the scheme of designing peripheral reinforcement, can effectively form reliable protection to data communication unit, extension cable life guarantees that performance is stable.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, so that any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present invention, should be included in the scope of the present invention.
Claims (7)
1. A self-shielding low crosstalk photoelectric hybrid cable is characterized in that: the cable comprises a cable core, and an outer shielding layer and an outer sheath which are sequentially coated on the outer side of the cable core from inside to outside; the cable core comprises an optical communication unit and a plurality of data communication units at the periphery of the optical communication unit, each optical communication unit is coated by a belting layer, an inner shielding structure is coated on the outer side of the belting layer, an inner sheath is coated on the outer side of the inner shielding structure, and the data communication units are embedded into the inner sheath; the optical communication unit comprises a central reinforcing structure and a plurality of groups of optical fiber ribbons on the periphery of the central reinforcing structure, and the outer side of each optical fiber ribbon is independently coated with a self-shielding layer; and filling materials are filled in gaps among the optical fiber ribbons.
2. The self-shielded low crosstalk hybrid optical-electrical cable of claim 1, wherein: the data communication unit is evenly distributed with 4 groups by taking the central reinforcing piece as the center.
3. The self-shielded low crosstalk hybrid optical-electrical cable of claim 1, wherein: the outer sheath is a chlorinated polyethylene flame-retardant sheath.
4. The self-shielded low crosstalk hybrid optical-electrical cable of claim 1, wherein: the central reinforcing structure comprises a central reinforcing member, and a central protective layer is coated on the periphery of the central reinforcing member.
5. The self-shielded low crosstalk hybrid optical-electrical cable of claim 4, wherein: the central reinforcing part is made of glass fiber, polyester aramid fiber yarn or steel wire.
6. The self-shielded low crosstalk hybrid optical-electrical cable of claim 4, wherein: the central protective layer adopts a copper wire braided layer.
7. The self-shielded low crosstalk hybrid optical-electrical cable of claim 1, wherein: the filling material is made of glass fiber materials, polypropylene materials or hemp ropes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111414160.7A CN114300191A (en) | 2021-11-25 | 2021-11-25 | Self-shielding low-crosstalk photoelectric hybrid cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111414160.7A CN114300191A (en) | 2021-11-25 | 2021-11-25 | Self-shielding low-crosstalk photoelectric hybrid cable |
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| CN114300191A true CN114300191A (en) | 2022-04-08 |
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| CN202111414160.7A Pending CN114300191A (en) | 2021-11-25 | 2021-11-25 | Self-shielding low-crosstalk photoelectric hybrid cable |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205303043U (en) * | 2015-12-30 | 2016-06-08 | 邹建兰 | Durable type photoelectricity mixed light cable |
| CN208805600U (en) * | 2018-09-29 | 2019-04-30 | 东莞市汉都电子有限公司 | A kind of medical alarm indexed optical fiber wire and cable connector |
| CN211857010U (en) * | 2020-04-10 | 2020-11-03 | 徐州达普电缆技术有限公司 | Large-span aerial optical fiber ribbon optical cable |
-
2021
- 2021-11-25 CN CN202111414160.7A patent/CN114300191A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205303043U (en) * | 2015-12-30 | 2016-06-08 | 邹建兰 | Durable type photoelectricity mixed light cable |
| CN208805600U (en) * | 2018-09-29 | 2019-04-30 | 东莞市汉都电子有限公司 | A kind of medical alarm indexed optical fiber wire and cable connector |
| CN211857010U (en) * | 2020-04-10 | 2020-11-03 | 徐州达普电缆技术有限公司 | Large-span aerial optical fiber ribbon optical cable |
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