CN114924374B

CN114924374B - Optical ribbon cable

Info

Publication number: CN114924374B
Application number: CN202210751317.3A
Authority: CN
Inventors: 李国昌; 何园园
Original assignee: Futong Group Co Ltd
Current assignee: Futong Group Co Ltd
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2023-05-09
Anticipated expiration: 2042-06-29
Also published as: CN114924374A

Abstract

The invention belongs to the field of optical cables, and particularly relates to a ribbon optical cable. It comprises the following steps: the core wire and the module type sheath layer are arranged outside the core wire; the core wire is internally provided with a plurality of wire grooves which are uniformly distributed on the outer side of the reinforcing piece around the circumference of the reinforcing piece, and the wire grooves are internally provided with optical fiber wires; the sheath layer is composed of a plurality of strip-shaped modules which are axially arranged along the optical cable, the inner sides of the strip-shaped modules are of a ladder-shaped structure on the radial section of the optical cable, the outer sides of the strip-shaped modules are connected in a round shape, and the outer surfaces of the core wires are abutted against the inner sides of the strip-shaped modules; the outer surface of the sheath layer is provided with a beam tube, and an outer sheath is arranged outside the beam tube. The optical cable realizes modularization inside the optical cable through structural improvement, forms mutually matched sheath layers, realizes effective compression-resistant buffering through the matching of each strip-shaped module of the sheath layers, and greatly improves the compression resistance of the ribbon-shaped optical cable.

Description

Optical ribbon cable

Technical Field

The invention belongs to the field of optical cables, and particularly relates to a ribbon optical cable.

Background

The ribbon-shaped optical cable is formed by bonding and arranging multi-core optical fibers by using special materials to form a ribbon and combining the multi-ribbon. Currently, optical cables having a multi-core number such as 72 cores or more belong to the class of ribbon cables. Compared with the common single-core optical cable, the ribbon optical cable has obvious advantages in aspects of construction, connection, end forming and the like, so that the ribbon optical cable is more widely applied.

Existing ribbon cables are generally divided into two structural types: a beam tube type and a skeleton type. The skeleton type optical fiber ribbon cable is divided into a single skeleton type optical fiber ribbon cable, a composite skeleton type optical fiber ribbon cable and the like, and is adjusted according to different application environments. But more commonly and often also bundle-type ribbon cables, which are subdivided into central bundle-type ribbon cables and layer-twisted ribbon cables. The most common of these are layer twisted ribbon cables. The optical cable unit is formed by coating a plurality of optical cable units containing ribbon-shaped optical fibers by protective layers, and the optical cable units inside the optical cable units are distributed in scattered points, so that the optical cable unit has the characteristics of being high in core number, convenient in branching treatment and the like. However, the optical cable unit in the existing layer-stranding type ribbon optical cable adopts a full solid structure, the actual compression resistance of the whole optical cable is weak after the layer-stranding type ribbon optical cable is matched with the layer-stranding type structure, the optical fiber is easy to attenuate after being compressed, and the attenuation is large.

Disclosure of Invention

The invention provides a band-shaped optical cable, which aims to solve the problems that the existing band-shaped optical cable is poor in compression resistance and easy to generate larger optical fiber attenuation after being stressed and the transmission performance is weakened.

The invention aims at:

1. the light weight of the ribbon optical cable is realized through structural improvement;

2. the compression resistance of the ribbon cable is improved through structural cooperation while the light weight is realized.

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

A ribbon cable comprising:

the core wire and the module type sheath layer are arranged outside the core wire;

the core wire is internally provided with a plurality of wire grooves which are uniformly distributed on the outer side of the reinforcing piece around the circumference of the reinforcing piece, and the wire grooves are internally provided with optical fiber wires;

the sheath layer is composed of a plurality of strip-shaped modules which are axially arranged along the optical cable, the inner sides of the strip-shaped modules are of a ladder-shaped structure on the radial section of the optical cable, the outer sides of the strip-shaped modules are connected in a round shape, and the outer surfaces of the core wires are abutted against the inner sides of the strip-shaped modules;

the outer surface of the sheath layer is provided with a beam tube, and an outer sheath is arranged outside the beam tube.

As a preferred alternative to this,

the ladder-shaped structure sequentially comprises a first ladder, a second ladder and a third ladder from inside to outside along the axial direction of the optical cable, the center of the inner side of the same strip-shaped module is the third ladder, the two sides of the third ladder are the second ladder, the outermost end of the third ladder is the first ladder, and the first ladder of the strip-shaped module is mutually abutted in the circumferential direction.

As a preferred alternative to this,

the boss with the bulge is arranged on the third step and is abutted against the outer surface of the core wire.

As a preferred alternative to this,

the wire slot is a rounded isosceles triangle, the top tip of the wire slot faces outwards along the radial direction, and the optical fiber wire is tangentially attached to the inner wall of the wire slot.

As a preferred alternative to this,

the optical fiber line is a round line and a plurality of ribbon optical fibers are embedded in the optical fiber line.

As a preferred alternative to this,

the sheath layer is also provided with an arc-shaped supporting bar, and the arc-shaped supporting bar is arc-shaped and is arched to be abutted to the outer surface of the core wire on the radial section of the optical cable.

As a preferred alternative to this,

the number of the arc-shaped supporting bars is equal to that of the strip-shaped modules, the arc-shaped supporting bars are arranged between two adjacent strip-shaped modules, and two arc-shaped ends of the arc-shaped supporting bars are abutted to the second steps of the two adjacent strip-shaped modules.

The beneficial effects of the invention are as follows:

the optical cable realizes modularization of the inside of the optical cable through structural improvement, forms the mutually matched sheath layers, realizes effective compression-resistant buffering through the matching of each strip-shaped module of the sheath layers, simultaneously forms a larger internal allowance space, saves the optical cable materials, realizes a certain degree of light weight, and provides more space for improving the core number of the optical cable through a more abundant cavity structure in the inside.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic diagram showing a first stage deformation of the abutting portion of the sheathing layer strip module after the optical cable is stressed;

FIG. 3 is a schematic diagram showing deformation of the cable in the transition stage at the abutting part of the sheath layer strip module after the cable is stressed;

FIG. 4 is a schematic diagram showing a second stage deformation of the abutting portion of the sheathing layer strip module after the optical cable is stressed;

in the figure: 100 bundles of tubes, 200 jackets, 300 strip modules, 301 first steps, 302 second steps, 303 third steps, 304 bosses, 400 core wires, 401 trunking, 500 reinforcements, 600 optical fiber wires, 700 arc-shaped support bars.

Detailed Description

The invention is described in further detail below with reference to specific examples and figures of the specification. Those of ordinary skill in the art will be able to implement the invention based on these descriptions. In addition, the embodiments of the present invention referred to in the following description are typically only some, but not all, embodiments of the present invention. Therefore, all other embodiments, which can be made by one of ordinary skill in the art without undue burden, are intended to be within the scope of the present invention, based on the embodiments of the present invention.

In the description of the present invention, it should be understood that the terms "thickness," "upper," "lower," "horizontal," "top," "bottom," "inner," "outer," "circumferential," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present invention. In the description of the present invention, the meaning of "a plurality" means at least two, for example, two, three, etc., unless explicitly defined otherwise, the meaning of "a number" means one or more.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

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

Examples

A ribbon cable as shown in fig. 1, comprising in particular:

a core wire 400 and a module type sheath layer disposed outside the core wire 400;

the core wire 400 is provided with a reinforcing member 500 at the axis, a plurality of wire grooves 401 are uniformly distributed around the circumference of the reinforcing member 500 in the core wire 400, optical fiber wires 600 are arranged in the wire grooves 401, the optical fiber wires 600 are round wires, and a plurality of ribbon-shaped optical fibers are embedded in the optical fiber wires 600;

the wire groove 401 is an isosceles triangle with round corners, the top tip of the isosceles triangle faces outwards along the radial direction, and the optical fiber wire 600 is tangentially attached to the inner wall of the wire groove 401;

the sheath layer is composed of a plurality of strip-shaped modules 300 axially arranged along the optical cable, wherein the inner sides of the strip-shaped modules 300 are of a ladder-shaped structure on the radial section of the optical cable, the outer sides of the strip-shaped modules are connected to form a circle, and the specific ladder-shaped structure is as follows:

on the radial section of the optical cable, two ends facing the inner side of the axis are flush to form a first step 301, the inner ends, close to the middle part of the strip-shaped module 300, of the first step 301 sink into a flush second step 302 towards the outer side direction deviating from the axis of the optical cable, a third step 303 is formed between the two second steps 302 on the same strip-shaped module 300, which sink into a flush third step 303 towards the outer side direction deviating from the axis of the optical cable, the middle part of the third step 303 protrudes towards the cable core of the optical cable to form a boss 304 to be abutted to the outer surface of the core wire 400, and the core wire 400 is limited and fixed;

the bundle tube 100 is arranged on the outer surface of the sheath layer, the bundle tube 100 bundles and fixes the modularized sheath layer, and the stable matching arrangement of each strip-shaped module 300 of the sheath layer is realized through the matching of the core wire 400 and the boss 304 and the bundle fixation of the bundle tube 100;

the outer sheath 200 is arranged outside the beam tube 100, and the outer sheath 200 mainly has the conventional protection effects of wear resistance, weather resistance and the like.

Under the cooperation of the structure, the ribbon optical cable has very excellent compression resistance and torsion resistance;

unlike the conventional integrated jacket structure, which converts external stress into internal stress by absorbing and transforming the internal stress, and forms buffer protection mainly by deformation, in the technical scheme of the invention, since the optical fiber ribbon is easy to damage compared with the conventional bundle-shaped optical fiber, more sufficient compression protection is required, the strip-shaped modules 300 are mutually extruded to realize force reversing guidance while the optical cable is subjected to external pressure to convert the external stress into the internal stress to form deformation buffer effect, thereby generating more excellent compression resistance effect;

on the other hand, the inner side of the sheath layer is provided with a step structure, such as a conventional arc structure and the like, the deformation of the step structure has continuity, for example, when the deformation initial stage of the first step 301 is small in deformation amplitude, the second step 302 and the third step 303 are almost free from deformation, and a stress absorption peak is formed when the deformation is conducted to the second stage, so that a relatively better stress absorption effect is generated;

the above-mentioned processes are sequentially shown in fig. 2, 3 and 4, firstly, as shown in fig. 2, a small amount of deformation is performed on the first step 301, the end forms a surface area to be abutted, and a part of the first step 301 is bent in a plane, so that a large amount of axial acting force is converted into acting force which is abutted circumferentially, and along with the increase or continuous acting of the acting force, the connecting slope between the first step 301 and the second step 302 also generates bending deformation, and outwards arches, the abutting area of the first step 301 is larger, the radian becomes larger, and the connecting slope between the first step 301 and the second step 302 is more outwards arched, and then, as shown in fig. 4, after the connecting slope between the first step 301 and the first step 301 almost forms an arc, the second step 302 is driven to be concavely deformed inwards, and the deformation at this moment is a transient deformation, so that a stress absorption peak can be formed.

In addition, the rounded triangular wire cavity in the core wire 400, which is circumferentially arranged on the reinforcement 500, can also generate a good deformation buffering effect, so that the stress of the optical fiber ribbon in the optical fiber wire 600 is ensured to be reduced, and the direct stress is avoided.

Further, the method comprises the steps of,

the sheath layer is also provided with an arc-shaped supporting bar, and the arc-shaped supporting bar is arc-shaped on the radial section of the optical cable;

the number of the arc-shaped supporting bars is equal to that of the strip-shaped modules, the arc-shaped supporting bars are arranged between two adjacent strip-shaped modules 300, the two arc-shaped ends of the arc-shaped supporting bars are abutted on the second steps 302 of the two adjacent strip-shaped modules 300, and the arc-shaped supporting bars are arched inwards to be abutted on the outer surface of the core wire 400;

under the cooperation of the arc-shaped supporting strips, the core wire 400 can be better limited and fixed, a certain deformation buffering effect is achieved, the compression resistance of the optical cable is improved, the boss 304 is separated from the outer surface of the core wire 400 when the optical cable is stressed, the stability of the core wire 400 is easy to drop down due to the deformation of the optical cable, the arc-shaped supporting strips cannot generate larger offset deformation along with the deformation of the strip-shaped module 300, meanwhile, the setting form of the arc-shaped supporting body 700 is also suitable for the deformation trend of the second step 302, and a relatively better limiting and fixing effect can be still achieved.

Claims

1. A fiber optic ribbon cable comprising:

the outer surface of the sheath layer is provided with a beam tube, and an outer sheath is arranged outside the beam tube:

the specific ladder-shaped structure is as follows:

on the radial cross section of the optical cable, two ends of the inner side facing the axis are flush to form a first ladder, the inner ends of the first ladder, which are close to the middle part of the strip-shaped module, sink into the outer side direction deviating from the axis of the optical cable to form a flush second ladder, and two second ladders on the same strip-shaped module sink into the outer side direction deviating from the axis of the optical cable to form a flush third ladder, and the middle part of the third ladder protrudes towards the optical cable core to form a boss to be abutted to the outer surface of the core wire, so that the core wire 400 is limited and fixed.

2. A fiber optic ribbon cable according to claim 1, wherein,

3. A fiber optic ribbon cable according to claim 1, wherein,

4. A fiber optic ribbon cable according to claim 1 or 3, wherein,

5. A fiber optic ribbon cable according to claim 1, wherein,

6. A fiber optic ribbon cable according to claim 5, wherein,