Parallel pair group and cable

Abstract

The utility model discloses a parallel pair group and a cable, the parallel pair group comprises conductors, a double-core-hole-shaped annular insulator, a first shielding layer and a first belting layer, two core holes in the double-core-hole-shaped annular insulator are arranged in parallel at intervals, and the conductors are embedded in the core holes; the first shielding layer is arranged on the outer side of the double-core hole-shaped annular insulator, the first belting layer is arranged on the outer side of the first shielding layer, a plurality of hole-shaped gap channels are arranged in the double-core hole-shaped annular insulator, and the plurality of hole-shaped gap channels are uniformly distributed around the two conductors and are parallel to the conductors. According to the utility model, the integrated thin-wall double-core hole-shaped co-extrusion insulation is adopted to replace the traditional two single-core circular insulation, so that the structure is more stable, the loss is lower, and the transmission speed is higher.

Description

Technical Field

[0001] The present application relates to the technical field of high-frequency carrier, digital communication and signal transmission, and in particular to a parallel pair line group and a cable. Background Art

[0002] Traditional high-speed data transmission cables are usually composed of multiple parallel pairs, such as 2 pairs, 4 pairs, 8 pairs, etc. Among them: a single conductor is extruded with a layer of insulation to form a core, and after the two cores are arranged in parallel, an annular shielding layer and a tape layer are coated on the two cores to form a single pair. The two cores forming a single pair are close to each other and parallel in the length direction, without crossing or twisting each other, which is called a "parallel pair".

[0003] The traditional parallel pair wire group is usually formed by shielding layer and tape layer longitudinally wrapped and wrapped on two wire cores to form a ring structure. The internal structure of the two parallel wire cores is not filled and fixed. When subjected to external mechanical stress, crosstalk may occur due to the offset of the parallel pair structure, thereby limiting the transmission rate of the cable. And if the two wire cores are foamed insulation, their pressure resistance and bending resistance are worse, and it is easier to cause cable structure deformation. The uneven internal structure of the cable will cause the return loss index to deteriorate, which will have a great obstruction on the transmission of the cable. For this reason, the utility model proposes a parallel pair wire group and a cable. Utility Model Content

[0004] The embodiments of the present application provide a parallel pair wire group and a cable, which have a stable structure, lower loss and faster transmission speed.

[0005] In a first aspect, the present application provides a parallel pair wire group, comprising: a conductor, a double-core hole-shaped annular insulation, a first shielding layer and a first tape layer;

[0006] The two core holes on the double-core hole-shaped annular insulation are arranged in parallel and spaced apart, and the conductor is embedded in each of the core holes;

[0007] The first shielding layer is arranged outside the double-core hole-shaped annular insulation;

[0008] The first tape layer is arranged outside the first shielding layer;

[0009] A plurality of hole-shaped gap channels are arranged in the double-core hole-shaped annular insulation;

[0010] The plurality of hole-shaped gap channels are evenly distributed around the two conductors and are parallel to the conductors.

[0011] Optionally, it also includes: a ground wire;

[0012] The ground wire is located between the double-core hole-shaped annular insulation and the first shielding layer, and the ground wire is electrically connected to the aluminum base surface of the first shielding layer.

[0013] Optionally, the conductor is made of silver-plated copper, tin-plated copper or bare copper.

[0014] Optionally, the double-core hole-shaped annular insulation is an integrally formed structure, and the material of the double-core hole-shaped annular insulation is an insulating resin material.

[0015] Optionally, the first shielding layer is an aluminum-plastic composite shielding tape or a copper-plastic composite shielding tape.

[0016] Optionally, the first wrapping layer is a hot-melt Mylar layer, a flame-retardant PET layer or a flame-retardant PI layer.

[0017] A second aspect of the present application provides a cable, which includes: an outer layer and at least two of the above-mentioned parallel pair wire groups.

[0018] Optionally, at least two of the parallel pair groups are arranged side by side and equidistantly in the outer sheath to form a wiring cable.

[0019] Optionally, it also includes: a wrapping layer for wrapping the parallel pair wire group into a cable core, a metal foil shielding layer longitudinally wrapped and overlapped outside the cable core, and a braided shielding layer braided and wrapped outside the metal foil shielding layer;

[0020] The outer layer is extruded and coated outside the braided shielding layer.

[0021] Optionally, it also includes: a filling component for filling the center position of the cable.

[0022] Optionally, the filling component is a circular structure, and the diameter of the filling component is 1.0 to 1.5 mm;

[0023] The filling component is made of PP, PE or FEP material.

[0024] Optionally, the wrapping layer is a PP foam tape or a PET film.

[0025] Optionally, the metal foil shielding layer is an aluminum-plastic composite shielding tape or a polyimide aluminum-plastic composite shielding tape.

[0026] Optionally, the braided shielding layer is a metal wire braided shielding layer.

[0027] Optionally, the metal wire braided shielding layer is formed by a plurality of metal braided wires being alternately and tightly woven together, wherein the diameter of a single metal braided wire is 0.05-0.10 mm, and the braiding density is not less than 60%.

[0028] Optionally, the outer layer is made of thermoplastic extruded material, and the minimum thickness of the outer layer is not less than 0.4 mm.

[0029] It can be seen from the above technical scheme that the embodiments of the present application have the following advantages: the parallel pair line group uses a double-core hole-shaped annular insulation to cover two parallel conductors into an annular insulation layer, replacing the traditional single-core circular insulation, thereby improving the structural stability of the two-core conductors in the parallel line pair. At the same time, the double-core hole-shaped annular insulation has multiple hole-shaped gap channels evenly distributed around the two conductors, which can effectively reduce the insulation equivalent dielectric constant, thereby greatly reducing cable losses, improving product differential performance and impedance consistency and production efficiency, reducing signal-to-noise ratio and the breeding of common-mode signals, and is particularly suitable for high-speed data transmission of data center interconnections. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the structure of a parallel line group in an embodiment of the present application;

[0031] Figure 2 This is another structural schematic diagram of the parallel line group in the embodiment of the present application;

[0032] Figure 3 This is a schematic diagram of the first structure of the cable in the embodiment of the present application;

[0033] Figure 4 This is a schematic diagram of the second structure of the cable in the embodiment of the present application;

[0034] Figure 5 This is a third structural schematic diagram of the cable in the embodiment of the present application;

[0035] Wherein, the accompanying drawings are marked as follows:

[0036] 1-parallel pair group, 11-conductor, 12-double-core hole-shaped annular insulation, 13-first shielding layer, 14-first tape layer, 15-ground wire, 2-metal foil shielding layer, 3-braided shielding layer, 4-outer layer, 5-filling component, 6-wrapping layer. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application 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 limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] This application provides an embodiment of a parallel line group. Figure 1 .

[0041] The parallel pair line group in this embodiment includes: a conductor 11, a double-core hole-shaped annular insulation 12, a first shielding layer 13 and a first wrapping layer 14. The two core holes on the double-core hole-shaped annular insulation 12 are arranged in parallel and spaced apart, and the conductors 11 are embedded in the core holes; the first shielding layer 13 is arranged on the outside of the double-core hole-shaped annular insulation 12, and the first wrapping layer 14 is arranged on the outside of the first shielding layer 13. A plurality of hole-shaped gap channels are arranged in the double-core hole-shaped annular insulation 12, and the plurality of hole-shaped gap channels are evenly distributed around the two conductors 11 and are all parallel to the conductors 11.

[0042] It should be noted that: this parallel pair line group uses a double-core hole-shaped annular insulation 12 to cover two parallel conductors 11 into an annular insulation layer, replacing the traditional single-core circular insulation, thereby improving the structural stability of the two-core conductors 11 in the parallel line pair. At the same time, the double-core hole-shaped annular insulation 12 has multiple hole-shaped gap channels evenly distributed around the two conductors 11, which can effectively reduce the insulation equivalent dielectric constant, thereby greatly reducing cable losses, improving product differential performance and impedance consistency and production efficiency, reducing signal-to-noise ratio and the breeding of common-mode signals, and is particularly suitable for high-speed data transmission in data center interconnections.

[0043] The above is an embodiment of a parallel line group provided in the embodiment of the present application. The following is an embodiment of a parallel line group provided in the embodiment of the present application. For details, please refer to Figure 1 and Figure 2 .

[0044] The parallel pair line group in this embodiment includes: a conductor 11, a double-core hole-shaped annular insulation 12, a first shielding layer 13 and a first wrapping layer 14. The two core holes on the double-core hole-shaped annular insulation 12 are arranged in parallel and spaced apart, and the conductors 11 are embedded in the core holes; the first shielding layer 13 is arranged on the outside of the double-core hole-shaped annular insulation 12, and the first wrapping layer 14 is arranged on the outside of the first shielding layer 13. A plurality of hole-shaped gap channels are arranged in the double-core hole-shaped annular insulation 12, and the plurality of hole-shaped gap channels are evenly distributed around the two conductors 11 and are all parallel to the conductors 11.

[0045] The double-core hole-shaped annular insulation 12 is an integrally molded structure, and the material of the double-core hole-shaped annular insulation 12 is selected from an insulating resin material that is suitable for high-speed extrusion thin-wall molding and high electrical performance and can be melt-processed. Specifically, the insulating resin material can be PE, PP, FEP, ETFE or PTFE material. Preferably, a copolymer of tetrafluoroethylene and hexafluoropropylene (FEP) material with high melt fluidity and excellent electrical properties is used.

[0046] It should be noted that the double-core porous annular insulation 12 is co-extruded with the thin-walled porous insulation of the double-core conductor 11. The insulating layer is a ring-shaped insulation with a porous gap that covers the two-core conductor 11, replacing the traditional single-core circular insulation. By adopting a vertical drop extrusion method, the lateral traction pore compression and airflow-induced line diameter fluctuations are effectively avoided. The mechanical natural drop is used for insulation extrusion, and a thin-walled insulation with uniform pore size, small insulation line diameter fluctuation, and stable structure is obtained. In addition, a porous structure design is adopted, and multiple porous gap channels are evenly arranged around the parallel two-core conductors 11, which can effectively reduce the insulation equivalent dielectric constant and dielectric loss factor, obtain low-loss characteristics, improve the transmission speed, and make the cable more high-speed and accurate information transmission. At the same time, the one-piece insulation also improves the product differential performance and impedance consistency and production efficiency.

[0047] Optionally, it also includes: a ground wire 15, which is made of tinned copper wire and can be a round wire or a flat wire. When a ground wire 15 is provided in the parallel pair wire group, there are at least one or two ground wires. The ground wire 15 is located on either side of the center line of the cable and is provided between the double-core hole-shaped annular insulation 12 and the first shielding layer 13. The ground wire 15 is electrically connected to the aluminum base surface of the first shielding layer 13 to play a role in grounding and tensile resistance.

[0048] The conductor 11 may be made of high conductivity materials such as silver-plated copper, tin-plated copper or bare copper. Preferably, the coating thickness of the plated conductor 11 is not less than 1 μm, so that the conductor 11 has excellent high temperature resistance, corrosion resistance and good soft solderability required by different application environments.

[0049] The first shielding layer 13 can be an aluminum-plastic composite shielding tape or a copper-plastic composite shielding tape, which is longitudinally overlapped outside the double-core hole-shaped annular insulation 12, or outside the possible ground wire 15 and the double-core hole-shaped annular insulation 12, to reduce electromagnetic interference and shielding effect, and avoid interference of induced current on the transmission signal.

[0050] The first wrapping layer 14 may be a hot-melt Mylar layer, a flame-retardant PET layer or a flame-retardant PI layer, which is wrapped around the first shielding layer 13 to enhance the shielding effect and further stabilize the parallel pair structure.

[0051] like Figure 5 As shown, the present application also provides a wiring cable, which includes an outer sheath 4 and at least two of the above-mentioned parallel pair wire groups 1.

[0052] At least two parallel wire groups 1 are arranged side by side and equidistantly in the outer layer 4 to form a cable arrangement. Preferably, the outer layer 4 is made of hot-melt Mylar tape material. After several parallel wire groups 1 are placed in parallel and equidistantly, they are wrapped with hot-melt Mylar tape and then melted in a high-temperature oven to form an integrated cable arrangement. The outer layer 4 plays a connecting and protective buffering role, further improving the structural stability of the parallel wire group 1.

[0053] The present application also provides an embodiment of a high-speed parallel cable. Figure 3 .

[0054] The high-speed parallel cable in this embodiment includes: four of the above-mentioned parallel pair wire groups 1, a wrapping layer 6 for wrapping the parallel pair wire groups 1 into a cable core, a metal foil shielding layer 2 longitudinally wrapped and overlapped outside the cable core, a braided shielding layer 3 braided and wrapped outside the metal foil shielding layer 2, and an outer sheath 4 extruded and wrapped outside the braided shielding layer 3.

[0055] Optionally, it further includes: a filling component 5 for filling the center position of the cable, and the four parallel line groups 1 are evenly distributed around the filling component 5.

[0056] Specifically, the filling component 5 is a circular structure, and the diameter of the filling component 5 is 1.0-1.5 mm, which ensures that the cabling of the four pairs of parallel wire groups 1 is round; the material of the filling component 5 can be PP, PE or FEP material.

[0057] The wrapping layer 6 is made of PP foam tape or PET film and is wrapped around the four parallel line groups 1 and the filling component 5 to form a cable core, which is circular in shape as a whole.

[0058] The metal foil shielding layer 2 is an aluminum-plastic composite shielding tape or a polyimide aluminum-plastic composite shielding tape, which is longitudinally overlapped outside the cable core, and the overlap rate is not less than 18%, playing a role of overall shielding.

[0059] The braided shielding layer 3 is a metal wire braided shielding layer 3, which is braided and covered outside the metal foil shielding layer 2. Specifically, the metal wire braided shielding layer 3 is formed by a plurality of metal braided wires being alternately and tightly woven, and has excellent electrical continuity and flexibility, which can further reduce resistance loss and improve shielding properties, wherein the diameter of a single metal braided wire is 0.05-0.10 mm, and the braiding density is not less than 60%.

[0060] The outer layer 4 is made of thermoplastic extrusion material, and the minimum thickness of the outer layer 4 is not less than 0.4 mm, which further protects the parallel line group 1 from external mechanical stress damage and high and low temperature environment resistance. Specifically, the thermoplastic extrusion material can be PVC, PE, LSZH or FEP.

[0061] The above is an embodiment of a high-speed parallel cable provided in the embodiment of the present application. The following is an embodiment of a high-speed parallel cable provided in the embodiment of the present application. For details, please refer to Figure 4 .

[0062] The high-speed parallel cable in this embodiment includes: 8 parallel pair groups 1 mentioned above, a wrapping layer 6 for wrapping the parallel pair groups 1 into a cable core, a metal foil shielding layer 2 longitudinally wrapped and overlapped outside the cable core, a braided shielding layer 3 braided and wrapped outside the metal foil shielding layer 2, and an outer sheath 4 extruded and wrapped outside the braided shielding layer 3.

[0063] Specifically, the wrapping layer 6 is wrapped around the two parallel wire groups 1 as the central component of the cable core, and the remaining six parallel wire groups 1 are evenly distributed around the central component of the cable core; the wrapping layer 6 is then used to wrap the eight parallel wire groups 1 into a cable core, and the cable core is circular as a whole. The metal foil shielding layer 2 is longitudinally wrapped and overlapped on the outside of the cable core, and then the braided shielding layer 3 is wrapped around the metal foil shielding layer 2 to further strengthen the shielding and improve the mechanical properties; the outer layer 4 is extruded and wrapped around the braided shielding layer 3 to further protect the parallel wire groups 1.

[0064] Optionally, it also includes: a filling component 5 for filling the center position of the cable (ie, the center component of the cable core).

[0065] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A parallel line group, characterized in that: include: Conductor, double core hole-shaped annular insulation, first shielding layer and first tape layer; The two core holes on the double-core hole-shaped annular insulation are arranged in parallel and spaced apart, and the conductor is embedded in each of the core holes; The first shielding layer is arranged outside the double-core hole-shaped annular insulation; The first tape layer is arranged outside the first shielding layer; A plurality of hole-shaped gap channels are arranged in the double-core hole-shaped annular insulation; The plurality of hole-shaped gap channels are evenly distributed around the two conductors and are parallel to the conductors.

2. The parallel line group according to claim 1, characterized in that: Also includes: Ground wire; The ground wire is located between the double-core hole-shaped annular insulation and the first shielding layer, and the ground wire is electrically connected to the aluminum base surface of the first shielding layer.

3. The parallel line group according to claim 1, characterized in that: The conductor is made of silver-plated copper, tin-plated copper or bare copper.

4. The parallel line group according to claim 1, characterized in that: The double-core hole-shaped annular insulation is an integrally formed structure, and the material of the double-core hole-shaped annular insulation is an insulating resin material.

5. The parallel line group according to claim 1, characterized in that: The first shielding layer is an aluminum-plastic composite shielding tape or a copper-plastic composite shielding tape.

6. The parallel line group according to claim 1, characterized in that: The first wrapping layer is a hot-melt Mylar layer, a flame-retardant PET layer or a flame-retardant PI layer.

7. A cable, characterized in that: include: An outer layer and at least two parallel wire groups as claimed in any one of claims 1-6.

8. The cable according to claim 7, characterized in that: At least two of the parallel line groups are arranged side by side and equidistantly in the outer layer to form a wiring cable.

9. The cable according to claim 7, characterized in that: Also includes: Used to wrap the parallel pair wire group into a wrapping layer of the cable core, longitudinally wrap a metal foil shielding layer overlapped outside the cable core, and braided shielding layer wrapped outside the metal foil shielding layer; The outer layer is extruded and coated outside the braided shielding layer.

10. The cable according to claim 9, characterized in that: Also includes: A filler component used to fill the center of the cable.

11. The cable according to claim 10, characterized in that: The filling component is a circular structure, and the diameter of the filling component is 1.0 to 1.5 mm; The filling component is made of PP, PE or FEP material.

12. The cable according to claim 9, characterized in that: The wrapping layer is a PP foaming tape or a PET film.

13. The cable according to claim 9, characterized in that: The metal foil shielding layer is an aluminum-plastic composite shielding tape or a polyimide aluminum-plastic composite shielding tape.

14. The cable according to claim 9, characterized in that The braided shielding layer is a metal wire braided shielding layer.

15. The cable according to claim 14, characterized in that The metal wire braided shielding layer is formed by a plurality of metal braided wires being alternately and tightly woven together, wherein the diameter of a single metal braided wire is 0.05-0.10 mm, and the braiding density is not less than 60%.

16. The cable according to claim 9, characterized in that The outer layer is made of thermoplastic extruded material, and the minimum thickness of the outer layer is not less than 0.4 mm.

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