CN112037993A

CN112037993A - Photoelectric hybrid cable

Info

Publication number: CN112037993A
Application number: CN202010880884.XA
Authority: CN
Inventors: 周永明
Original assignee: Hangzhou Futong Communication Technology Co Ltd
Current assignee: Hangzhou Futong Communication Technology Co Ltd
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2020-12-04
Anticipated expiration: 2040-08-27
Also published as: CN112037993B

Abstract

The invention belongs to the field of cables, and particularly relates to a photoelectric hybrid cable. It includes: the sheath layer, and the conducting wire group and the optical fiber group which are symmetrically arranged in the sheath layer; the cross section of the conductive wire group is circular, the cross section of the optical fiber group is oval, and the extension line of the long axis of the optical fiber group passes through the circle center of the conductive wire group; a special-shaped reinforcing part is also arranged in the sheath layer; the special-shaped reinforcing piece consists of a head part and a tail part; the head part is covered outside the conductive wire group and faces the end opening of the optical fiber group; the tail part is formed by a structure of two sections of elliptical arcs, is connected to two ends of the opening of the head part and is symmetrically arranged at the upper end and the lower end of the optical fiber line group. The invention forms a structure which takes the conductive wire group and the special-shaped reinforcing piece as main bearing acting force through the improvement of the structure, and protects the optical fiber group.

Description

Photoelectric hybrid cable

Technical Field

The invention belongs to the field of cables, and particularly relates to a photoelectric hybrid cable.

Background

An Optical Power Cable (OPC) is an integrated transmission medium that organically combines a conductive wire and an Optical fiber wire and can transmit electric energy and Optical information simultaneously, on the same way and in the same direction. The integrated integration of power flow and information flow is realized, and information such as voice, data and video is transmitted while electric energy is transmitted through once erection, once construction and once investment, so that the construction period is greatly shortened, the construction cost is reduced, and resources are saved.

However, most of the existing hybrid optical-electrical cables adopt a mode of coaxially arranging an optical fiber line and a conductive wire, and the optical fiber line is arranged at an axis, and this installation mode easily causes damage of the optical fiber when the conductive wire is subjected to electrical breakdown, which leads to interruption of optical signal transmission and network disconnection.

Disclosure of Invention

The invention provides a photoelectric hybrid cable, aiming at solving the problems that the existing photoelectric hybrid cable is difficult to avoid the damage of an optical fiber line caused by the electric breakdown or overheating of a conductive line part, and/or the network breaking caused by the mechanical damage of the optical fiber line and the like.

The invention aims to:

1) the conductive wire group and the optical fiber wire group are arranged in an asymmetric structure, so that the problem that the optical fiber wire group is damaged due to electric breakdown of the conductive wire group is avoided;

2) the optical fiber line group is protected by utilizing the better mechanical property of the conductive line group;

3) the protection effect on the optical fiber group in the hybrid cable is further improved by arranging the reinforcing piece with the asymmetric structure.

In order to achieve the purpose, the invention adopts the following technical scheme.

An optical-electrical hybrid cable comprising:

the sheath layer, and the conducting wire group and the optical fiber group which are symmetrically arranged in the sheath layer;

the cross section of the conducting wire group is circular, the cross section of the optical fiber group is oval, and the extension line of the long axis of the cross section of the optical fiber group passes through the center of the cross section of the conducting wire group;

the radius of the conductive line group is larger than the semishort axis of the optical fiber line group;

a special-shaped reinforcing part is also arranged in the sheath layer;

the special-shaped reinforcing piece consists of a head part and a tail part;

the cross section of the head part is arc-shaped, the head part covers the conductive wire group and faces the end opening of the optical fiber group;

the tail part is formed by a structure with two sections of elliptical arcs in cross section, is respectively connected to two ends of the head opening, and is symmetrically arranged at the upper end and the lower end of the optical fiber line group by taking the long axis of the cross section of the optical fiber line group as a symmetrical line.

As a preference, the first and second liquid crystal compositions are,

the conductive wire group is formed by covering a plurality of conductive wires by a first bundle of tubes, and the cross section of the first bundle of tubes is circular;

the optical fiber line group is formed by covering a plurality of optical fiber lines by a second beam tube, and the cross section of the second beam tube is elliptical.

As a preference, the first and second liquid crystal compositions are,

the conducting wire group and the optical fiber wire group are not contacted with each other and are not tangent to the outer edge of the sheath layer.

As a preference, the first and second liquid crystal compositions are,

the elliptic arc of the tail part is arched outwards back to the optical fiber line group.

As a preference, the first and second liquid crystal compositions are,

an isolation layer is arranged outside the sheath layer and is made of waterproof rubber.

As a preference, the first and second liquid crystal compositions are,

the isolation layer is externally provided with a flame-retardant layer, and the flame-retardant layer is prepared from silicon rubber.

As a preference, the first and second liquid crystal compositions are,

and the sheath layer is also provided with arch-shaped reinforcing pieces which are symmetrically arranged by taking the long axis of the optical fiber line group as a symmetrical line.

As a preference, the first and second liquid crystal compositions are,

the connecting line of the middle points of the arched reinforcing pieces passes through the circle center of the photoelectric mixed cable and is vertical to the extension line of the long axis of the optical fiber group;

the arched reinforcing piece is arched outwards, and the outer surface of the arched reinforcing piece is tangent to the inner surface of the isolating layer.

The invention has the beneficial effects that:

1) the damage of the optical fiber wire caused by electric breakdown can be effectively avoided;

2) through the improvement of the structure, the conductive wire group is used as a part for mainly bearing external mechanical acting force to mechanically protect the optical fiber group;

3) the protection effect on the optical fiber line set is further improved through the arrangement of the asymmetric reinforcing piece.

Description of the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of a force application of the present invention;

FIG. 3 is another force diagram of the present invention;

in the figure: 100 sheath layers, 200 conducting wire groups, 201 conducting wires, 202 first bundle tubes, 300 optical fiber wire groups, 301 optical fiber wires, 302 second bundle tubes, 400 special-shaped reinforcing elements, 401 head parts, 402 tail parts, 403 nodes, 500 isolating layers, 600 flame-retardant layers and 700 arched reinforcing elements.

The specific implementation mode is as follows:

the invention is described in further detail below with reference to specific embodiments and the attached drawing figures. Those skilled in the art will be able to implement the invention based on these teachings. Moreover, the embodiments of the present invention described in the following description are generally only some embodiments of the present invention, and not all embodiments. Therefore, all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "several" means one or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Unless otherwise specified, the raw materials used in the examples of the present invention are all commercially available or available to those skilled in the art; unless otherwise specified, the methods used in the examples of the present invention are all those known to those skilled in the art.

Examples

An optical-electrical hybrid cable with asymmetric structure as shown in fig. 1 mainly comprises:

the optical cable comprises a sheath layer 100, a conductive wire group 200 and an optical fiber wire group 300, wherein the conductive wire group 200 and the optical fiber wire group 300 are symmetrically arranged in the sheath layer 100, the conductive wire group 200 and the optical fiber wire group 300 are completely coated by the sheath layer 100, the edge part of the conductive wire group 200 and the optical fiber wire group 300 are not tangent to or abutted against the outer edge of the sheath layer 100, the connection line of the geometric centers of the conductive wire group and the optical fiber wire group passes through the geometric center of the sheath layer 100, the midpoint of the connection line is superposed with the geometric center of the sheath layer 100, and the;

the conductive wire group 200 is formed by wrapping a plurality of conductive wires 201 by a first bundle of tubes 202, the optical fiber group 300 is formed by wrapping a plurality of optical fiber lines 301 by a second bundle of tubes 302, and the optical fiber lines 301 are formed by wrapping single-mode optical fibers or multi-mode optical fibers or optical fiber bundles by non-woven fabric wrapping bands;

the cross section of the first beam tube 202 is circular, the cross section of the second beam tube 302 is oval, the extension line of the long axis of the cross section of the second beam tube 302 passes through the center of the cross section of the first beam tube 202, the cross section of the optical fiber line 301 is circular, the optical fiber line 301 is tangent to the inner walls of the two ends of the second beam tube 302 in the short axis direction, and the beam tube can be made of common PBT materials, but is not limited to PBT;

the radius of the circular cross section of the first beam tube 202 is R, the semimajor axis of the oval cross section of the second beam tube 302 is a, and the semiminor axis is b, which simultaneously satisfy | R-a | ≦ 0.05 × R, | R-a | ≦ 0.05 × a, and R ≥ 2b, in the embodiment, R ═ a and R ═ 2b are taken;

under the condition, when the hybrid cable is stressed longitudinally, stress distribution beneficial to the optical fiber line set 300 can be formed, namely the conductive line set 200 is used as a main bearing part of the hybrid cable when the hybrid cable is stressed, so that the optical fiber line set 300 is prevented from being damaged due to larger pressure, and the optical fiber line set 300 is effectively protected by utilizing the advantages that the conductive line set 200 is better in overall pressure resistance and smaller in performance influence after stress compared with the optical fiber line set 300;

on the other hand, when a transverse force is applied, that is, the force direction acts on the hybrid cable along the long axis direction of the cross section of the second bundle tube 302, due to the elliptical structure of the second bundle tube 302, the optical fiber line group 300 has a certain deformation margin, when a pressure in the direction is applied, the second bundle tube 302 in the optical fiber line group 300 is compressed along the long axis direction of the cross section, a is gradually reduced, and before a is reduced to be equal to b, the optical fiber line group 300 cannot be directly applied with a force, so that the optical fiber line 301 is well protected.

Further, a special-shaped reinforcing member 400 is further arranged in the sheath layer 100 and is made of a hard silica gel material;

the special-shaped reinforcing piece 400 is composed of a head part 401 and a tail part 402, the special-shaped reinforcing piece 400 is shown in fig. 1, the cross section of the head part 401 is arc-shaped, the head part 401 is coaxially and non-contact arranged outside the conducting wire group 200, an opening is arranged towards the direction of the optical fiber line group 300, the opening angle is 60-90 degrees, the opening angle is 90 degrees in the embodiment, the tail part 402 is in a structure with two sections of elliptical cross sections, the two sections of the tail part 402 are respectively connected with two ends of the opening of the head part 401, the tail end is symmetrically arranged by taking the long axis of the cross section of the optical fiber line group 300 as a symmetry axis, as shown in fig. 1, the tail end is symmetrically arranged at the upper end and the lower.

The special-shaped reinforcing member 400 is arranged to further improve the protection effect on the optical fiber set 300 when the optical fiber set is stressed longitudinally or transversely, and disperse the stress of part of the conductive wire set 200, so that the whole hybrid cable has better pressure resistance, and the conductive wire set 200 and the optical fiber set 300 are not easily damaged;

under the condition that the special-shaped reinforcing member 400 is not arranged, when the optical cable is subjected to longitudinal pressure, although most of the stress is concentrated on the conductive wire set 200, a part of force still acts on the optical fiber set 300, when the optical cable is subjected to transverse pressure, the optical fiber set 300 is easily extruded by larger transverse pressure, after the special-shaped reinforcing member 400 is arranged, when the optical cable is subjected to longitudinal pressure, the force originally acting on the optical fiber set 300 can be absorbed or weakened by the tail part 402 of the special-shaped reinforcing member 400, the stress of the optical fiber set 300 is reduced, the optical fiber 301 is protected, when the hybrid cable is subjected to transverse pressure, although deformation difference can still be formed on the left side and the right side of the hybrid cable, under the action of the tail part 402 of the special-shaped reinforcing member 400, the second bundle of tubes 302 are not simply deformed, but tend to move towards the conductive wire set 200, and the stress of the tail part 402 can be transmitted to the head part 401 of the special-shaped reinforcing member 400, namely, the conductive wire set 200 is more resistant to voltage and less prone to damage, so that the optical fiber set 300 is well protected;

when longitudinal pressure is applied, as shown in fig. 2 in particular, longitudinal pressure F1 acts on the hybrid cable, the sheath layer 100 firstly forms a tendency of compression deformation along the a direction and expansion along the b direction, and transmits the force to the profiled reinforcement 400, the head part 401 of the profiled reinforcement 400 has a tendency of deformation along the c1 direction, the tail part 402 has a tendency of deformation along the c2 direction, the c1 direction is parallel to the c2 direction, i.e. the deformation tendencies of the head part 401 and the tail part 402 in the initial state tend to be consistent, but because both are arc-shaped structures, the joint of the head part 401 and the tail part 402 in the deformation process is simultaneously acted by the head part 401 and the tail part 402, and because the curvature radius of the head part 401 is smaller and the curvature radius of the tail part 402 is larger, the transverse force applied to the head part 401 at the joint 403 of the head part 401 and the tail part 402 in fig. 2 is larger, so that the head part 401 and the tail part 402 of the profiled reinforcement, The right side is a tail end, the head end of the tail part 402 is also closed inwards due to the closing of the head part 401, the tail end has a tendency of opening, and the deformation amount of the tail part 402 along the c2 direction is reduced, so that the special-shaped reinforcing piece 400 is taken as a demarcation point, the area outside the special-shaped reinforcing piece 400 in the hybrid cable is marked as A, the area coated by the special-shaped reinforcing piece 400 is marked as B, due to the blocking and deformation buffering of the special-shaped reinforcing piece 400, the acting force on the area B is reduced, the deformation amount of the area A along the longitudinal direction is larger than that of the area B, the deformation ratio of the area A and the area B is increased from 1:1 to x:1(x > 1), the deformation difference is formed, the force of the conductive wire group 200 and the optical fiber wire group 300 in the area B, which are actually subjected to deformation and extrusion by the sheathing layer 100, is;

on the other hand, when the optical-electrical hybrid cable is subjected to the action of the transverse pressure F2, as shown in fig. 3, the transverse pressure F2 acts on the hybrid cable, the sheath layer 100 is firstly subjected to transverse compressive deformation along the direction d, the tail end of the tail part 402 of the special-shaped reinforcement 400 is subjected to a force along the direction e, the head end of the tail part 402 of the special-shaped reinforcement 400 is subjected to deformation along the direction F, the direction e and the direction F are parallel, but the actual deformation amounts of the head end and the tail end are different, the deformation amplitude of the tail end is larger, meanwhile, the deformation limit exists at the head end, the node 403 at the connection part of the head part 402 of the tail part 402 of the special-shaped reinforcement 400 and the head part 401 of the special-shaped reinforcement 400 is deformed and gradually approaches the conductive wire group 200 until the conductive wire group 200 cannot be compressed and deformed any more, at this time, the conductive wire group 200 forms an alternative stress, that is a part of the force acts on the conductive wire group 200 through the tail part 402, compared with a mode that the second bundle tube 302 in the optical fiber line set 300 is directly extruded when the special-shaped reinforcing member 400 is not arranged, the compression degree of the area C is reduced by a mode of offsetting towards the conductive line set 200, the purpose of reducing the compression amount of the second bundle tube 302 in the optical fiber line set 300 along the long axis direction is achieved, the protection effect on the optical fiber line set 300 is improved, partial force acts on the conductive line set 200 through the special-shaped reinforcing member 400, the actual stress of the area C is further reduced, the stress condition of the optical fiber line set 300 is optimized to a greater extent, and the optical fiber line set 300 is well protected.

Further, in the above-mentioned case,

a waterproof and moistureproof isolating layer 500 is arranged outside the sheath layer 100, is made of waterproof rubber, plays a role in waterproof and moistureproof, and has certain flexibility and insulativity;

further, in the above-mentioned case,

a flame-retardant layer 600 is arranged outside the isolation layer 500, and the flame-retardant layer 600 is made of fire-resistant and insulating silicon rubber and also has flexibility;

the sheath layer 100 is further provided with vertically symmetrical arch-shaped reinforcing members 700, the arch-shaped reinforcing members 700 are made of hard silica gel, the cross section of the arch-shaped reinforcing members 700 is in an arc arch shape as shown in fig. 1, and a connecting line of midpoints of the two arch-shaped reinforcing members 700 passes through the center of a circle of the photoelectric mixed cable and is perpendicular to an extension line of a long axis of the optical fiber line group 300;

the arched reinforcement 700 is arched outward with the outer surface tangent to the inner surface of the insulation layer 500.

The arrangement of the arched reinforcing member 700 can further reduce the stress of the optical fiber set 300 when the hybrid cable is stressed longitudinally, and the second bundle of tubes 302 are more difficult to be compressed along the short axis direction of the cross section and extrude the optical fiber 301 by the outward lifting trend of the two sides of the arched reinforcing member 700 after being stressed, and simultaneously play roles of dispersing stress and protecting the conductive wire set 200.

Claims

1. An optical-electrical hybrid cable, comprising:

a special-shaped reinforcing part is also arranged in the sheath layer;

the special-shaped reinforcing piece consists of a head part and a tail part;

2. The hybrid optical/electrical cable according to claim 1,

3. The hybrid optical/electrical cable according to claim 1,

4. The hybrid optical/electrical cable according to claim 1,

5. The hybrid optical/electrical cable according to claim 1,

6. The hybrid optical/electrical cable according to claim 5,

7. The optical-electrical hybrid cable according to claim 5 or 6,

8. The hybrid optical/electrical cable according to claim 7,