CN215265706U - Photoelectric composite cable - Google Patents

Abstract

The utility model discloses a photoelectric composite cable, composite cable's cable core is tightened by the outer covering band layer and a set of signal of telecommunication parallel line pair and a set of light signal parallel line pair that is in the same place side by side is constituteed, the signal of telecommunication parallel line pair is mainly tightened by the internal shield layer and two insulation core that are in the same place side by side constitute, and the cross-section outline is waist type hole profile form, the light signal parallel line pair is tightened by the inner covering band layer and two tight package optic fibre that are in the same place side by side constitute, and the cross-section outline is waist type hole profile form, the cross-section of cable core is circle inscription rectangular structure, and there is the composite gap in the inside of signal of telecommunication parallel line pair and light signal parallel line pair respectively, exists the composite gap between outer covering band layer and signal of telecommunication parallel line pair and/or the light signal parallel line pair. The utility model has the characteristics of simple structure, small structure, low in manufacturing cost, compliance are good, suit in the inner space narrow and small, to the exquisite computer lab of winding displacement structural requirement, rack inside application.

Description

Photoelectric composite cable

Technical Field

The utility model relates to a cable specifically is a composite cable who has light signal and signal of telecommunication transmission function.

Background

The photoelectric composite cable is a multifunctional cable for transmitting light signals (namely, communication functions) and electric signals (namely, electric conduction functions), and is beneficial to simplifying a flat cable structure of an application place and reducing electromagnetic interference between the transmission of the light signals and the electric signals.

At present, common photoelectric composite cables are formed in a flat or dumbbell-shaped structure, such as "a novel photoelectric integrated cable and a preparation method thereof" (publication No. CN 102063965, publication No. 2011, 05 and 18 days), "a novel low-smoke halogen-free flame retardant type photoelectric composite cable" (publication No. CN 203415300, publication No. 2014, 01 and 29 days), and the like, disclosed in chinese patent documents. The structure of the photoelectric composite cable is relatively large in size, and is not suitable for being applied to machine rooms and cabinets (such as telecommunication data switching centers) with narrow internal space and delicate wiring structure requirements.

Further, the applicant found that the chinese patent document also discloses a photoelectric composite cable having a relatively round structure, and more specifically, the name "a method for manufacturing a dual core composite acoustic cable" (publication No. CN 113053575, published 2021, 06/29). Although the technology discloses a cable integrating the functions of optical signal transmission and electrical signal transmission into a whole by a relatively full-circle structure, the cable has complex molding structure design and high manufacturing technical difficulty and cost; on the other hand, multiple (or multiple) filling cores are filled in the cable core (including the conductive unit and the light guide unit), under the influence of the filling cores, the cable core is of a solid core structure with high hardness, no flexibility and large size, so that the structure volume of the formed photoelectric composite cable is relatively large and is not flexible, and the cable core is not suitable for being applied in machine rooms and cabinets with narrow internal space and delicate requirements on flat cable structures.

SUMMERY OF THE UTILITY MODEL

The technical purpose of the utility model is that: aiming at the particularity of the photoelectric composite cable and the defects of the prior art, the photoelectric composite cable is simple in structure, small in structure volume, low in manufacturing cost, good in flexibility, suitable for being applied to the interior of a machine room and a machine cabinet with narrow internal space and delicate requirements on a flat cable structure.

The technical purpose of the utility model is realized by the following technical proposal that the cable core of the photoelectric composite cable is composed of a group of electric signal parallel line pairs and a group of optical signal parallel line pairs which are bound together by an outer wrapping belt layer, the electric signal parallel line pair is mainly composed of two insulated wire cores which are bound by an inner shielding layer and are arranged side by side, the outer profile of the cross section is in a waist-shaped hole profile shape, the optical signal parallel line pair is composed of two tightly-packed optical fibers which are tightly bound by an inner wrapping layer and are arranged side by side, the outer profile of the cross section is in a waist-shaped hole profile, the cross section of the cable core is in a round-inscribed rectangular structure, and the insides of the electric signal parallel line pair and the optical signal parallel line pair respectively have a combination gap, and a combined gap exists between the outer wrapping tape layer and the electric signal parallel line pair and/or the optical signal parallel line pair. The technical measure is that the electric signal parallel line pairs and the optical signal parallel line pairs with basically the same cross-section outline are closely arranged together in a basically symmetrical mode, so that the composite cable with relatively stable and relatively round structure and integrated optical signal and electric signal transmission function is formed, and the extrusion force born by each component of the cable core is naturally dredged in a mode of naturally preserving and combining gaps in the cable core, thereby effectively reducing the distortion of an electric field, enabling the structure of the cable core to be compact and small, and being beneficial to ensuring the flexibility of the cable core, so that the formed cable forms the relatively round outline with small structure volume, has good flexibility, and is suitable for being applied in machine rooms and cabinets with narrow internal space and delicate requirements on a flat cable structure; in addition, the cable formed by the technical measure has the characteristic of simple structure, is convenient to manufacture and form, and can effectively reduce the manufacturing cost.

Preferably, the insulated wire core of the electric signal parallel wire pair is composed of a conductor of a silver-plated copper wire structure and an insulating layer for coating the conductor. Furthermore, the conductor is in a silver-plated copper wire single-wire structure with the diameter of 0.3-0.5 mm. The thickness of the silver plating layer on the surface of the conductor is 2-4 mu m. The insulating layer is of a polytetrafluoroethylene material extrusion structure. The insulated wire core of the technical measure forms a silver-plated copper conductor with a specific structure with extremely small resistivity based on the skin effect of signal current, thereby reliably forming high-frequency digital signal current transmission and achieving the technical effect of high-speed transmission; in addition, the outer diameter of the conductor is smaller, which is beneficial to the structure miniaturization of the formed cable.

As one preferable scheme, the electric signal parallel line pair is provided with a ground wire, and the ground wire is covered and distributed between the two insulated wire cores by an inner shielding layer. The technical measure can form safe grounding wiring and can form good electromagnetic shielding technical effect on the electric signal parallel line pair.

As one of the preferable schemes, the inner shielding layer is a wrapping structure with 20-30% of overlapping rate of a copper strip, the thickness of the copper strip is 0.03-0.05 mm, and the width of the copper strip is 2-3 times of the outer diameter of the cable core. The inner shielding layer of the technical measure can form a good shielding effect on the electromagnetic interference of the electric signal parallel line to the external environment, and ensure the stable transmission of signal current; except the electromagnetic shielding effect, the forming structure of the inner shielding layer can better wrap and attach to the outer surfaces of the electric signal parallel line pairs, so that overlarge extrusion force on the electric signal parallel line pairs can be effectively prevented, and the electric signal parallel line pairs can be stably shaped.

Preferably, the tight-buffered optical fiber of the optical signal parallel line pair is composed of a g.657 optical fiber and a tight-buffered layer covering the g.657 optical fiber. The technical measure can stably realize high-frequency optical signal transmission.

As one preferable scheme, an outer shielding layer and a sheath layer are sequentially arranged outside the outer wrapping belt layer from inside to outside. Further, the outer shielding layer is of a tight sparse winding structure of a copper wire with the diameter of 0.5-0.8 mm; the technical measure forms a compact metal shielding structure with a small structure outside the cable core, thereby effectively shielding the electromagnetic interference of the external environment and simultaneously effectively enhancing the tensile resistance along the longitudinal direction of the cable. The sheath layer is of an extruded structure made of Teflon material; the technical measure can keep good physical properties in severe environments including severe temperature differences.

Preferably, the inner wrapping tape layer and the outer wrapping tape layer are wrapping structures of polyester tapes respectively.

The utility model has the beneficial technical effects that: the electric signal parallel line pairs and the optical signal parallel line pairs with basically the same cross-section outline are closely arranged together in a basically symmetrical mode, so that the composite cable with a relatively stable and relatively round structure and integrated optical signal and electric signal transmission function is formed, and extrusion force born by each component of the cable core is naturally dredged in a mode of naturally reserving combined gaps in the cable core, so that electric field distortion is effectively reduced, the structure of the cable core is compact and small, and the flexibility of the cable core is favorably ensured, so that the formed cable forms a relatively round outline with a small structural volume, has good flexibility, and is suitable for being applied to the interior of machine rooms and cabinets with narrow internal space and delicate requirements on flat cable structures; in addition, the cable formed by the technical measure has the characteristic of simple structure, is convenient to manufacture and form, and can effectively reduce the manufacturing cost.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

The reference numbers in the figures mean: 1-pair of parallel lines of electrical signals; 11-insulated wire core; 111-a conductor; 112-an insulating layer; 12-ground line; 13 — an inner shield layer; 2-optical signal parallel line pair; 21-tight-buffered optical fiber; 211-g.657 fiber; 212 — a tight-clad layer; 22-inner wrapping layer; 3, coating a belt layer; 4-outer shielding layer; 5, a sheath layer.

Detailed Description

The present invention relates to a cable, and more particularly to a composite cable having optical signal and electrical signal transmission functions, which is described in detail with reference to a plurality of embodiments. In the embodiment 1, the technical solution content of the present invention is clearly and specifically explained with reference to the attached drawings of the specification, that is, fig. 1; in other embodiments, although not separately depicted, the main structure of the embodiment can still refer to the drawings of embodiment 1.

It is expressly stated here that the drawings of the present invention are schematic, and unnecessary details have been simplified for the purpose of clarity in order to avoid obscuring the technical solutions that contribute to the prior art.

Example 1

Referring to fig. 1, the utility model discloses a cable core, and in proper order the cladding in the outside outer shielding layer 4 of cable core and restrictive coating 5.

Specifically, the cable core is provided with an electric signal parallel line pair 1 and an optical signal parallel line pair 2 which are closely arranged side by side.

The electrical signal parallel line pair 1 has two insulated wire cores 11 closely arranged side by side in a substantially parallel manner, and a ground wire 12 at a side gap between the two insulated wire cores 11.

Each insulated wire core 11 is composed of a conductor 111 of a silver-plated copper wire single-wire structure with the diameter of about 0.5mm and an insulating layer 112 of a polytetrafluoroethylene extrusion coating structure coated outside the conductor 111. The thickness of the silver coating on the surface of the conductor 111 formed by the silver coated copper wire single wire is about 3 μm.

And selecting a copper strip with the thickness of about 0.04mm and the width of about 3 times of the outer diameter of the cable core as a forming copper strip of the inner shielding layer 13. The copper tape is wrapped around the two parallel insulated wire cores 11 and the outside of the ground wire 12 between the two insulated wire cores 11 with an overlapping rate of about 30%, so as to form an inner shielding layer 13, and the inner shielding layer 13 tightens the two insulated wire cores 11. The two insulated wire cores 11 which are bound by the inner shielding layer 13 and arranged side by side and the ground wire 12 which is arranged between the two insulated wire cores 11 form an electric signal parallel wire pair 1.

The cross-sectional outline of the electric signal parallel line pair 1 is basically in the shape of a waist-shaped hole, and an unfilled combined gap naturally existing in the tightening and coating process exists inside the electric signal parallel line pair 1.

The optical signal parallel line pair 2 has two tightly packed optical fibers 21 closely side by side in a substantially parallel manner.

Each tight-buffered optical fiber 21 is composed of a g.657 optical fiber 211 and a tight-buffered layer 212 of teflon extrusion structure coated outside the g.657 optical fiber 211.

A polyester tape wrapped around the outside of two tightly-packed optical fibers 21 arranged side by side at an overlapping rate of about 30% was selected as a molding material for the inner-bag layer 22 to form the inner-bag layer 22, and the inner-bag layer 22 tightly binds them. Two tightly packed optical fibers 21 bound together by an inner tape layer 22 constitute an optical signal parallel pair 2.

The cross-sectional outer contour of the optical signal parallel line pair 2 is basically in the shape of a waist-shaped hole, and a combination gap which is not filled and naturally exists when the optical signal parallel line pair 2 is tightly wrapped exists inside. In addition, the length and the width of the cross section of the optical signal parallel line pair 2 are basically similar to those of the electrical signal parallel line pair 2, and the outer contour can be basically matched in a bilateral symmetry mode, so that the cable core is beneficial to rounding and enhancing stability.

The pair of electrical signal parallel lines 1 and the pair of optical signal parallel lines 2 are arranged closely side by side in a substantially parallel manner, and the outer contours of the pair of electrical signal parallel lines 1 and the pair of optical signal parallel lines 2 arranged closely side by side are substantially square (of course, irregular).

The outer covering belt layer 3 is formed by wrapping a polyester tape around the outer parts of the parallel electric signal line pair 1 and the parallel optical signal line pair 2 which are arranged side by side with an overlapping rate of about 30% as a forming material of the outer covering belt layer 3, and the outer covering belt layer 3 tightens the outer covering belt layer 3. The cable core formed by the outer covering band layer 3 binding the electric signal parallel line pair 1 and the optical signal parallel line pair 2 has a basically circular inscribed rectangle structure (of course, irregular).

And unfilled combined gaps which naturally exist in the process of tightly coating exist between the outer covering tape layer 3 of the cable core and the electric signal parallel line pairs 1 and/or the optical signal parallel line pairs 2 which are closely arranged side by side.

And an outer shielding layer 4 and a sheath layer 5 are sequentially arranged outside the outer wrapping belt layer 3 of the cable core from inside to outside.

The outer shielding layer 4 is a close and loosely wound structure of copper wires with the diameter of about 0.7 mm.

The sheath layer 5 is an extruded structure made of Teflon materials including polytetrafluoroethylene.

Example 2

The utility model discloses a cable core, and cladding in cable core outside outer shielding layer and restrictive coating in proper order.

Specifically, the cable core is provided with an electric signal parallel line pair and an optical signal parallel line pair which are closely arranged side by side.

The parallel pair of electrical signals has two insulated wire cores closely juxtaposed in a substantially parallel manner, and a ground line at a side gap between the two insulated wire cores.

Each insulated wire core is composed of a conductor with a silver-plated copper wire single-wire structure and a polytetrafluoroethylene extrusion-coated insulating layer, wherein the diameter of the silver-plated copper wire single-wire structure is about 0.4mm, and the polytetrafluoroethylene extrusion-coated insulating layer is coated outside the conductor. The silver-plated layer on the surface of the conductor formed by the silver-plated copper single wire is about 2 mu m thick.

And selecting a copper strip with the thickness of about 0.05mm and the width of about 2 times of the outer diameter of the cable core as a forming copper strip of the inner shielding layer. The copper strip is wrapped around the two parallel insulated wire cores and the outside of the ground wire between the two insulated wire cores with an overlapping rate of about 25 percent to form an inner shielding layer, and the inner shielding layer tightens the two insulated wire cores. The two insulated wire cores which are bound by the inner shielding layer and are arranged side by side and the ground wire which is positioned between the two insulated wire cores form an electric signal parallel wire pair.

The outer contour of the cross section of the electric signal parallel line pair is basically in the shape of a waist-shaped hole, and unfilled combined gaps naturally existing in tightening and coating exist inside the electric signal parallel line pair.

The optical signal parallel line pair has two tightly packed optical fibers closely side by side in a substantially parallel manner.

Each tightly-packed optical fiber consists of a G.657 optical fiber and a tightly-packed layer of a polytetrafluoroethylene extrusion-packing structure coated outside the G.657 optical fiber.

The polyester tape is selected as the forming material of the inner wrapping tape layer. The polyester tape was wrapped around the outside of two tightly-packed optical fibers side by side with an overlap of about 20% to form an inner tape layer that tightened them. Two tightly packed optical fibers bound together by an inner belt layer form an optical signal parallel line pair.

The cross-sectional outline of the optical signal parallel line pair is basically in the shape of a waist-shaped hole, and an unfilled combined gap naturally existing in the process of binding and coating exists inside the optical signal parallel line pair. In addition, the length and the width of the cross section of the optical signal parallel line pair are basically similar to those of the electrical signal parallel line pair, and the outer contour can be basically matched in a left-right symmetrical mode, so that the cable core is beneficial to rounding and enhancing stability.

The pair of electrical signal parallel lines and the pair of optical signal parallel lines are closely arranged in parallel, and the outer contours of the pair of electrical signal parallel lines and the pair of optical signal parallel lines which are closely arranged are substantially square (of course, irregular).

A polyester tape is selected as a forming material of the outer wrapping tape layer, the polyester tape is wrapped outside the parallel electric signal line pairs and the parallel optical signal line pairs which are arranged side by side with an overlapping rate of about 25% to form the outer wrapping tape layer, and the outer wrapping tape layer tightly wraps the parallel electric signal line pairs and the parallel optical signal line pairs. The cable core formed by binding the electric signal parallel line pairs and the optical signal parallel line pairs by the outer wrapping layer has a basically circular inscribed rectangle structure (of course, irregular).

And unfilled combined gaps which naturally exist in the process of tightly coating exist between the outer covering belt layer of the cable core and the electric signal parallel line pairs and/or the optical signal parallel line pairs which are closely arranged side by side.

And an outer shielding layer and a sheath layer are sequentially arranged outside the outer wrapping belt layer of the cable core from inside to outside.

The outer shielding layer is a compact sparse winding structure of copper wires with the diameter of about 0.5 mm.

The sheath layer is of an extruded structure made of Teflon materials including polytetrafluoroethylene.

Example 3

The utility model discloses a cable core, and cladding in cable core outside outer shielding layer and restrictive coating in proper order.

Specifically, the cable core is provided with an electric signal parallel line pair and an optical signal parallel line pair which are closely arranged side by side.

The parallel pair of electrical signals has two insulated wire cores closely juxtaposed in a substantially parallel manner, and a ground line at a side gap between the two insulated wire cores.

Each insulated wire core is composed of a conductor with a silver-plated copper wire single-wire structure and a polytetrafluoroethylene extrusion-coated insulating layer, wherein the diameter of the silver-plated copper wire single-wire structure is about 0.3mm, and the polytetrafluoroethylene extrusion-coated insulating layer is coated outside the conductor. The thickness of the silver-plated layer on the surface of the conductor formed by the silver-plated copper single wires is about 4 mu m.

And selecting a copper strip with the thickness of about 0.03mm and the width of about 3 times of the outer diameter of the cable core as a forming copper strip of the inner shielding layer. The copper strip is wrapped around the two parallel insulated wire cores and the outside of the ground wire between the two insulated wire cores with an overlapping rate of about 25 percent to form an inner shielding layer, and the inner shielding layer tightens the two insulated wire cores. The two insulated wire cores which are bound by the inner shielding layer and are arranged side by side and the ground wire which is positioned between the two insulated wire cores form an electric signal parallel wire pair.

The outer contour of the cross section of the electric signal parallel line pair is basically in the shape of a waist-shaped hole, and unfilled combined gaps naturally existing in tightening and coating exist inside the electric signal parallel line pair.

The optical signal parallel line pair has two tightly packed optical fibers closely side by side in a substantially parallel manner.

Each tightly-packed optical fiber consists of a G.657 optical fiber and a tightly-packed layer of a polytetrafluoroethylene extrusion-packing structure coated outside the G.657 optical fiber.

Polyester tape was selected as a molding material for the inner tape layer, and the polyester tape was wrapped around the outer portions of two tightly-packed optical fibers arranged side by side with an overlap ratio of about 30% to form the inner tape layer, which was tightly bound. Two tightly packed optical fibers bound together by an inner belt layer form an optical signal parallel line pair.

The cross-sectional outline of the optical signal parallel line pair is basically in the shape of a waist-shaped hole, and an unfilled combined gap naturally existing in the process of binding and coating exists inside the optical signal parallel line pair. In addition, the length and the width of the cross section of the optical signal parallel line pair are basically similar to those of the electrical signal parallel line pair, and the outer contour can be basically matched in a left-right symmetrical mode, so that the cable core is beneficial to rounding and enhancing stability.

The pair of electrical signal parallel lines and the pair of optical signal parallel lines are closely arranged in parallel, and the outer contours of the pair of electrical signal parallel lines and the pair of optical signal parallel lines which are closely arranged are substantially square (of course, irregular).

A polyester tape is selected as a forming material of an outer wrapping tape layer, the polyester tape is wrapped outside the parallel electric signal line pairs and the parallel optical signal line pairs in parallel at an overlapping rate of about 30% to form the outer wrapping tape layer, the outer wrapping tape layer tightly ties the parallel electric signal line pairs and the parallel optical signal line pairs, and the cross section of a cable core formed by tightly tying the parallel electric signal line pairs and the parallel optical signal line pairs by the outer wrapping tape layer is of a circular inscribed rectangular structure (certainly irregular).

And unfilled combined gaps which naturally exist in the process of tightly coating exist between the outer covering belt layer of the cable core and the electric signal parallel line pairs and/or the optical signal parallel line pairs which are closely arranged side by side.

And an outer shielding layer and a sheath layer are sequentially arranged outside the outer wrapping belt layer of the cable core from inside to outside.

The outer shielding layer is a compact sparse winding structure of copper wires with the diameter of about 0.8 mm.

The sheath layer is of an extruded structure made of Teflon materials including polytetrafluoroethylene.

Example 4

The utility model discloses a cable core, and cladding in cable core outside outer shielding layer and restrictive coating in proper order.

Specifically, the cable core is provided with an electric signal parallel line pair and an optical signal parallel line pair which are closely arranged side by side.

The electrical signal parallel line pair has two insulated wire cores closely juxtaposed in a substantially parallel manner.

Each insulated wire core is composed of a conductor with a silver-plated copper wire single-wire structure and a polytetrafluoroethylene extrusion-coated insulating layer, wherein the diameter of the silver-plated copper wire single-wire structure is about 0.4mm, and the polytetrafluoroethylene extrusion-coated insulating layer is coated outside the conductor. The thickness of the silver-plated layer on the surface of the conductor formed by the silver-plated copper single wires is about 3 mu m.

And selecting a copper strip with the thickness of about 0.05mm and the width of about 2.5 times of the outer diameter of the cable core as a forming copper strip of the inner shielding layer. This copper strips is at the outside of two insulation core wires side by side around the package with about 25% overlap ratio, forms the internal shield layer, and the internal shield layer is tightened up them. Two insulated wire cores which are bound by the inner shielding layer and are arranged side by side form an electric signal parallel wire pair.

The outer contour of the cross section of the electric signal parallel line pair is basically in the shape of a waist-shaped hole, and unfilled combined gaps naturally existing in tightening and coating exist inside the electric signal parallel line pair.

The optical signal parallel line pair has two tightly packed optical fibers closely side by side in a substantially parallel manner.

Each tightly-packed optical fiber consists of a G.657 optical fiber and a tightly-packed layer of a polytetrafluoroethylene extrusion-packing structure coated outside the G.657 optical fiber.

Polyester tape was selected as the molding material for the inner tape layer, wrapped around the outside of two tightly-packed optical fibers side by side with an overlap ratio of about 25%, to form the inner tape layer, which tightly binds them. Two tightly packed optical fibers bound together by an inner belt layer form an optical signal parallel line pair.

The cross-sectional outline of the optical signal parallel line pair is basically in the shape of a waist-shaped hole, and an unfilled combined gap naturally existing in the process of binding and coating exists inside the optical signal parallel line pair. In addition, the length and the width of the cross section of the optical signal parallel line pair are basically similar to those of the electrical signal parallel line pair, and the outer contour can be basically matched in a left-right symmetrical mode, so that the cable core is beneficial to rounding and enhancing stability.

The pair of electrical signal parallel lines and the pair of optical signal parallel lines are closely arranged in parallel, and the outer contours of the pair of electrical signal parallel lines and the pair of optical signal parallel lines which are closely arranged are substantially square (of course, irregular).

A polyester tape is selected as a forming material of the outer wrapping tape layer, the polyester tape is wrapped outside the parallel electric signal line pairs and the parallel optical signal line pairs which are arranged side by side with an overlapping rate of about 25% to form the outer wrapping tape layer, and the outer wrapping tape layer tightly wraps the parallel electric signal line pairs and the parallel optical signal line pairs. The cable core formed by binding the electric signal parallel line pairs and the optical signal parallel line pairs by the outer wrapping layer has a basically circular inscribed rectangle structure (of course, irregular).

And unfilled combined gaps which naturally exist in the process of tightly coating exist between the outer covering belt layer of the cable core and the electric signal parallel line pairs and/or the optical signal parallel line pairs which are closely arranged side by side.

And an outer shielding layer and a sheath layer are sequentially arranged outside the outer wrapping belt layer of the cable core from inside to outside.

The outer shielding layer is a compact sparse winding structure of copper wires with the diameter of about 0.6 mm.

The sheath layer is of an extruded structure made of Teflon materials including polytetrafluoroethylene.

The above examples are only for illustrating the present invention and are not to be construed as limiting the same.

Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications may be made to the above-described embodiments or equivalents may be substituted for some of the features thereof; and such modifications or substitutions do not depart from the spirit and scope of the present invention in its essence.

Claims (10)

1. An optical-electrical composite cable, characterized in that: the cable core of the composite cable consists of a group of electric signal parallel line pairs (1) and a group of optical signal parallel line pairs (2) which are tightly bound by an outer covering belt layer (3) and are arranged side by side, the electric signal parallel line pair (1) is mainly composed of two insulated wire cores (11) which are tightly bound by an inner shielding layer (13) and are arranged side by side, the outer profile of the cross section is in a waist-shaped hole profile shape, the optical signal parallel line pair (2) is composed of two tightly-packed optical fibers (21) which are tightly bound by an inner wrapping layer (22) and are arranged side by side, the outline of the cross section is in a waist-shaped hole outline shape, the cross section of the cable core is in a round-inscribed rectangular structure, and the insides of the electric signal parallel line pair (1) and the optical signal parallel line pair (2) are respectively provided with a combined gap, and a combined gap exists between the outer wrapping tape layer (3) and the electric signal parallel line pair (1) and/or the optical signal parallel line pair (2).

2. The optoelectrical composite cable of claim 1, wherein: the insulated wire core (11) of the electric signal parallel wire pair (1) consists of a conductor (111) with a silver-plated copper wire structure and an insulating layer (112) covering the conductor (111).

3. The optoelectrical composite cable of claim 2, wherein: the conductor (111) is in a silver-plated copper wire single-wire structure with the diameter of 0.3-0.5 mm.

4. The optoelectrical composite cable of claim 2 or 3, wherein: the thickness of the silver plating layer on the surface of the conductor (111) is 2-4 mu m.

5. The optoelectric composite cable of claim 1 or 2, wherein: the electric signal parallel line pair (1) is provided with a ground wire (12), and the ground wire (12) is covered and distributed between the two insulating wire cores (11) by an inner shielding layer (13).

6. The optoelectrical composite cable of claim 1, wherein: the inner shielding layer (13) is a wrapping structure with an overlapping rate of 20-30% for a copper strip, the thickness of the copper strip is 0.03-0.05 mm, and the width of the copper strip is 2-3 times of the outer diameter of the cable core.

7. The optoelectrical composite cable of claim 1, wherein: the tight-packed optical fiber (21) of the optical signal parallel line pair (2) consists of a G.657 optical fiber (211) and a tight-packed layer (212) covering the G.657 optical fiber (211).

8. The optoelectrical composite cable of claim 1, wherein: the outer shielding layer (4) and the sheath layer (5) are sequentially arranged outside the outer wrapping belt layer (3) from inside to outside.

9. The optoelectrical composite cable of claim 8, wherein: the outer shielding layer (4) is of a tight sparse winding structure of copper wires with the diameter of 0.5-0.8 mm.

10. The optoelectrical composite cable of claim 8, wherein: the sheath layer (5) is of an extruded structure made of Teflon materials.

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