CN112331401B

CN112331401B - Branch-able photoelectric mixed lead-in optical cable

Info

Publication number: CN112331401B
Application number: CN202011158527.9A
Authority: CN
Inventors: 朱晖; 姜泽兴; 王飞; 钱颖; 严春杰
Original assignee: Jiangsu Huamai Photoelectric Technology Co ltd
Current assignee: Jiangsu Huamai Photoelectric Technology Co ltd
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2022-02-11
Anticipated expiration: 2040-10-26
Also published as: CN112331401A

Abstract

The invention discloses a branch photoelectric mixed leading-in optical cable which comprises a cable core, and a wrapping tape, a water blocking tape, a metal composite tape and an outer sheath which are sequentially coated outside the cable core, wherein a central reinforcing piece is arranged in the cable core, at least two butterfly-shaped subunits and water blocking yarns are arranged outside the central reinforcing piece, and copper wires and optical fibers are arranged in the butterfly-shaped subunits. Through reasonable structural design, photoelectric signals or power and optical signals can be provided for users or equipment at the same time, laying efficiency is high, and cost is low.

Description

Branch-able photoelectric mixed lead-in optical cable

Technical Field

The invention relates to the technical field of optical cables, in particular to a branch optical-electric hybrid leading-in optical cable.

Background

With the development of FTTX and 5G networks in recent years, butterfly-shaped lead-in optical cables have also achieved rapid development, but butterfly-shaped optical cables can only provide optical cable access service for one house or one device during each laying due to their own structural problems, and when there are many users or devices, the construction efficiency is low; some devices need to be additionally provided with power supply or electric signals, which cannot be realized by pure butterfly-shaped leading-in optical cables. Therefore, there is a need for a drop cable that can complete multiple subscriber cable accesses at one time and provide additional power or electrical signals to the device.

Disclosure of Invention

The invention aims to provide a branch photoelectric mixed leading-in optical cable which can provide photoelectric signals or power supply and optical signals for users or equipment at the same time through reasonable structural design, and has high laying efficiency and low cost.

In order to solve the technical problem, the invention provides a branched photoelectric hybrid leading-in optical cable which comprises a cable core, and a wrapping tape, a water blocking tape, a metal composite tape and an outer sheath which are sequentially coated outside the cable core, wherein a central reinforcing part is arranged in the cable core, at least two butterfly-shaped subunits and water blocking yarns are arranged outside the central reinforcing part, and copper wires and optical fibers are arranged in the butterfly-shaped subunits.

In a preferred embodiment of the present invention, the wrapping tape is a non-woven fabric or a water-blocking fabric; the metal composite belt is an aluminum-plastic composite belt, a steel-plastic composite belt or a stainless steel-plastic composite belt; the outer sheath is made of low-smoke halogen-free flame-retardant polyolefin or flame-retardant polyethylene or polyvinyl chloride.

In a preferred embodiment of the present invention, the wrapping tape is a water-blocking cloth; the metal composite belt is a steel-plastic composite belt; the outer sheath is made of low-smoke halogen-free flame-retardant polyolefin.

In a preferred embodiment of the present invention, the butterfly subunit further has a size of 2.0 × 3.0 mm.

In a preferred embodiment of the present invention, the butterfly-shaped subunit is composed of an optical fiber, a copper wire and a butterfly-shaped sheath, and the butterfly-shaped sheath is made of low-smoke halogen-free flame-retardant polyolefin.

In a preferred embodiment of the present invention, a plurality of support rings are axially disposed outside the central reinforcement, at least two expanding rings are disposed outside the support rings, the expanding rings are connected end to form a circular ring, one butterfly subunit axially penetrates through one expanding ring, a hoop groove is disposed outside the expanding ring, a hoop is disposed in the hoop groove, at least one accommodating cavity is disposed in the expanding ring, a limiting rope is disposed in the accommodating cavity, and two ends of the limiting rope are respectively fixed to the expanding ring and the support rings.

In a preferred embodiment of the present invention, a friction layer is tightly disposed outside the central reinforcement, a slot is disposed on the friction layer, and a limiting protrusion is disposed on the inner ring of the support ring and extends into the slot.

In a preferred embodiment of the present invention, the unfolding ring further includes alignment protruding strips and alignment grooves respectively disposed at the head and the tail of the unfolding ring, and the alignment protruding strips of the next unfolding ring extend into the alignment grooves of the previous unfolding ring.

In a preferred embodiment of the present invention, an inner supporting layer is disposed on the central reinforcing member between two adjacent expanding rings, an inner side surface of the butterfly-shaped subunit is disposed on the inner supporting layer, an outer supporting layer is disposed on an outer side surface of the butterfly-shaped subunit, and the outer supporting layer is disposed in the wrapping band.

In a preferred embodiment of the present invention, the unfolding ring further includes an avoiding groove formed thereon.

The invention has the beneficial effects that:

according to the branch photoelectric hybrid drop cable, through the optimized design, the plurality of butterfly-shaped subunits can be accommodated in one optical cable, one optical cable can be laid to provide optical cable access service for a plurality of users or a plurality of devices, and when the number of users is large, the construction efficiency is greatly improved. In addition, the copper wires are integrated in the butterfly-shaped subunit, so that a power supply or an electric signal can be provided for users or equipment, extra wiring is not needed, the laying efficiency is further improved, and the cost is reduced.

Drawings

FIG. 1 is a first schematic cross-sectional view of a branched opto-electric hybrid drop cable;

FIG. 2 is a schematic cross-sectional view of a second optical drop cable;

FIG. 3 is a schematic diagram of a first stage deployment of a core of a splittable opto-electric hybrid drop cable;

FIG. 4 is a schematic diagram of a two-stage deployment of a core of a splittable opto-electric hybrid drop cable;

figure 5 is a schematic side view of a cable core.

1-a copper wire; 2-an optical fiber; 3-a butterfly subunit; 4-a central reinforcement; 5-water blocking yarn; 6-wrapping a tape; 7-water blocking tape; 8-a metal composite tape; 9-outer sheath, 10-friction layer, 11-inner supporting layer, 12-outer supporting layer, 13-wire passing cavity, 14-expanding ring, 15-hoop groove, 16-hoop ring, 17-accommodating cavity I, 18-limiting rope I, 19-accommodating cavity II, 20-limiting rope II, 21-aligning convex strip, 22-aligning groove, 23-supporting ring, 24-limiting protrusion and 25-avoiding groove.

Detailed Description

The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.

Examples

The invention discloses a branched photoelectric mixed leading-in optical cable, which is shown by referring to fig. 1-5 and comprises a cable core, and a wrapping tape 6, a water blocking tape 7, a metal composite tape 8 and an outer sheath 9 which are sequentially coated outside the cable core. A central reinforcing part 4 is arranged in the cable core. At least two butterfly-shaped subunits 3 and a water-blocking yarn 5 are arranged around the central reinforcing member 4. The butterfly-shaped subunit 3 is internally provided with a copper wire 1 and an optical fiber 2. Above optimized design can accommodate a plurality of butterfly subunits 3 in an optical cable, lays one and can provide optical cable access service for a plurality of users or a plurality of equipment, when the user is more, great promotion the efficiency of construction. In addition, the copper wire 1 is integrated in the butterfly-shaped subunit 3, so that a power supply or an electric signal can be provided for a user or equipment without extra wiring, the laying efficiency is further improved, and the cost is reduced.

The wrapping tape 6 is a non-woven fabric or a water-blocking fabric. The wrapping tape 6 in this embodiment is preferably a water-blocking cloth.

The metal composite tape 8 is an aluminum-plastic composite tape, a steel-plastic composite tape or a stainless steel-plastic composite tape. The metal composite tape 3 in the present embodiment is preferably a steel-plastic composite tape, which can enhance the lateral pressure resistance and rat resistance of the optical cable.

The outer sheath 9 is made of low-smoke halogen-free flame-retardant polyolefin or flame-retardant polyethylene or polyvinyl chloride. In this embodiment, the material of the outer sheath 9 is preferably low-smoke halogen-free flame-retardant polyolefin, which can enhance the flame-retardant performance of the optical cable and meet the environmental protection requirement.

The size of the butterfly subunit 3 is 2.0 x 3.0 mm.

The butterfly-shaped subunit 3 is composed of an optical fiber 2, a copper conductor 1 and a butterfly-shaped sheath. The butterfly sheath of the butterfly subunit 3 in this embodiment is low-smoke halogen-free flame-retardant polyolefin, which can further enhance the flame-retardant performance of the optical cable.

In order to prevent the different butterfly-shaped sub-units 3 from breaking due to an excessive bending angle during branching, a plurality of support rings 23 are axially arranged outside the central reinforcement 4. At least two deployment rings 14 are provided outside the support ring 23. The unfolding ring 14 is connected end to form a circular ring shape. A butterfly subunit 3 passes axially through a deployment ring 14. The expansion ring 14 is provided with a hoop groove 15. A hoop 16 is arranged in the hoop groove 15. The deployment ring 14 defines at least one receiving cavity. A limiting rope is arranged in the containing cavity. The two ends of the limiting rope are respectively fixed on the unfolding ring 14 and the supporting ring 23. With the above optimized design, the support ring 23 is in close contact with the central reinforcement 4, and the hoop 16 tightly hoops all the unfolding rings 14 on the support ring 23. When the butterfly subunit 3 needs to be branched, the part of the optical cable except the cable core is stripped, the hoop 16 is cut off, the unfolding ring 14 can be unfolded under the action of the pulling force of the butterfly subunit 3, and the limiting rope can limit the continuous movement of the unfolding ring 14 after the unfolding ring 14 moves to the limit, so that the butterfly subunit 3 can be supported on the hoop when the butterfly subunit 3 bends, the butterfly subunit 3 is in a gently-transitional arc shape, the force is not directly applied to the stripping position, and the problem that the butterfly subunit 3 is broken after a long time, and the use of the optical fiber 2 is influenced is avoided. The deployment ring 14 may be a quarter circle ring.

Specifically, for example, in the case of two-stage unfolding, the unfolding ring 14 has a first accommodating cavity 17 and a second accommodating cavity 19. The accommodating cavities 17 are two and are respectively positioned at two ends of the inner ring of the unfolding ring 14. A first limiting rope 18 is arranged in the accommodating cavity 17. The two ends of the first limiting rope 18 are respectively fixed on the unfolding ring 14 and the supporting ring 23. The second accommodating cavity 19 is provided with one and is positioned in the middle of the inner ring of the unfolding ring 14. A second limiting rope 20 is arranged in the second accommodating cavity 19. Two ends of the second limiting rope 20 are respectively fixed on the unfolding ring 14 and the supporting ring 23. The length of the second limiting rope 20 is smaller than that of the first limiting rope 18. When the hoop 16 is cut, the deployment ring 14 is capable of a first level of deployment, the maximum distance of deployment being the extended length of the second tether 20. When the second limiting rope 20 is cut off, the unfolding ring 14 can be unfolded in a second stage, and the maximum unfolding distance is the length of the first limiting rope 18. Therefore, two-stage transition can be formed on the butterfly subunit 3, the smoothness of the butterfly subunit 3 during turning is further improved, and the reliability of the optical fiber 2 is ensured. Meanwhile, the number of the limiting ropes can be increased, more stages of expansion can be performed, and the turning angle of the optical fiber 2 can be more smoothly limited, which is not described herein again.

In addition, in order to facilitate the cutting of the hoop 16, the first limiting rope 18 and/or the second limiting rope 20, an avoiding groove 25 may be formed in the deployment ring 14. The avoidance groove 25 can expose at least a portion of the hoop 16, the first restraint cord 18, and/or the second restraint cord 20 when the outer layer is peeled away.

In order to improve the stability of the deployment ring 14 when deployed, the central reinforcement 4 is tightly provided with a friction layer 10 on the outside. The friction layer 10 is provided with a slotted hole. The inner ring of the support ring 23 is provided with limiting projections 24. The restricting protrusion 24 protrudes into the slot. The friction layer 10 can generate friction force with the central reinforcing member 4 and the support ring 23, so that the support ring 23 is prevented from rotating and affecting the stability of the unfolding ring 14. The restricting projection 24 can completely restrict the rotation of the support ring 23.

The expansion ring 14 is provided with an alignment protrusion 21 and an alignment groove 22 at the head and the tail thereof, respectively. The alignment rib 21 of the next deployment ring 14 extends into the alignment groove 22 of the previous deployment ring 14. The alignment rib 21 and the alignment groove 22 prevent the deployment ring 14 from being axially displaced and scattered when tightened. In addition, when the outer layer of the optical cable is stripped to a certain expansion ring 14, even if the constraint of the outer layer is lost, the expansion ring 14 can still stably limit the position of the butterfly-shaped subunit 3, the outer layer is prevented from being continuously torn under the action of the pulling force of the butterfly-shaped subunit 3, and the reliability of the optical cable is improved.

In order to make the appearance of the optical cable smoother and have stronger lateral pressure resistance, an inner support layer 11 is provided on the central strength member 4 between two adjacent deployment rings 14. The inner side of the butterfly subunit 3 is located on the inner support layer 11. An outer support layer 12 is arranged on the outer side surface of the butterfly subunit 3. The outer support layer 12 is located within the wrapping tape 6. The space between the two expansion rings 14 can be filled with the inner supporting layer 11 and the outer supporting layer 12, so that the outer diameters of the optical cables are uniform, and the friction damage caused by unevenness is avoided.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.

Claims

1. A branch optical-electrical hybrid drop cable, comprising: the cable comprises a cable core, and a wrapping tape, a water blocking tape, a metal composite tape and an outer sheath which are sequentially coated outside the cable core, wherein a central reinforcing part is arranged in the cable core, at least two butterfly-shaped subunits and water blocking yarns are arranged outside the central reinforcing part, and copper wires and optical fibers are arranged in the butterfly-shaped subunits;

the central reinforcement is provided with a plurality of support rings outward along the axial, the support ring is provided with two at least exhibition ring openings outward, the ring form is constituteed to the exhibition ring opening end to end, one butterfly subunit passes an exhibition ring opening along the axial, the exhibition ring is opened outward and is equipped with the hoop groove, the hoop inslot is provided with the hoop, at least one holding chamber has been seted up to the exhibition ring opening, it sets up the spacing rope in the chamber to hold, the both ends of spacing rope are fixed respectively on exhibition ring opening and support ring.

2. The optical, hybrid drop cable of claim 1, wherein: the wrapping tape is non-woven fabric or water-blocking cloth; the metal composite belt is an aluminum-plastic composite belt, a steel-plastic composite belt or a stainless steel-plastic composite belt; the outer sheath is made of low-smoke halogen-free flame-retardant polyolefin or flame-retardant polyethylene or polyvinyl chloride.

3. The optical, hybrid drop cable of claim 2, wherein: the wrapping tape is water-resistant cloth; the metal composite belt is a steel-plastic composite belt; the outer sheath is made of low-smoke halogen-free flame-retardant polyolefin.

4. The optical, hybrid drop cable of claim 1, wherein: the size of the butterfly subunit is 2.0 x 3.0 mm.

5. The optical, hybrid drop cable of claim 1, wherein: the butterfly-shaped subunit consists of optical fibers, copper wires and a butterfly-shaped sheath, and the butterfly-shaped sheath is made of low-smoke halogen-free flame-retardant polyolefin.

6. The optical, hybrid drop cable of claim 1, wherein: the friction layer is tightly arranged outside the central reinforcing piece, a slotted hole is formed in the friction layer, a limiting protrusion is arranged on the inner ring of the support ring, and the limiting protrusion extends into the slotted hole.

7. The optical, hybrid drop cable of claim 1, wherein: the head and the tail of the unfolding ring are respectively provided with an alignment convex strip and an alignment groove, and the alignment convex strip of the next unfolding ring extends into the alignment groove of the previous unfolding ring.

8. The optical, hybrid drop cable of claim 1, wherein: an inner supporting layer is arranged on a central reinforcing piece between every two adjacent unfolding rings, the inner side face of each butterfly-shaped subunit is located on the inner supporting layer, an outer supporting layer is arranged on the outer side face of each butterfly-shaped subunit, and the outer supporting layer is located in the lapping band.

9. The optical, hybrid drop cable of claim 1, wherein: an avoiding groove is formed in the unfolding ring.