CN115128753A - a cable - Google Patents

Abstract

The invention belongs to the field of optical cables, and particularly relates to a ribbon cable. It includes: a sheath and a core; the sheath is provided with a central cavity, and the central cavity comprises an inner cavity and an outer cavity; the inner cavity is triangular on the radial section of the belt cable, the outer cavity is linear on the radial section of the belt cable, the inner end of the outer cavity is connected and communicated with the corner of the inner cavity, and the outer end of the outer cavity extends outwards along the radial direction of the belt cable sheath; the core wire comprises an inner bundle tube of an outer layer and a core part of an inner layer, a ribbon fiber is embedded in the core part, and the core wire is outwards abutted to the inner cavity wall of the inner bundle tube; the sheath is also provided with a buffer cavity; the buffer cavity corresponds the inner chamber lateral wall and sets up in the central cavity outside, and its inner wall is straight wall, outer wall are the arc wall, wholly is the structure that the middle part outwards arches on the radial cross-section of ribbon cable. Through reasonable structural improvement, the belt cable has good basic mechanical properties such as compression resistance and the like, and simultaneously the anti-torsion property of the belt cable is strengthened, so that the anti-torsion property of the belt cable is improved.

Description

a cable

technical field

The invention belongs to the field of optical cables, in particular to a ribbon cable.

Background technique

Ribbon cable is a special type of fiber optic cable in which the inner fiber lines are arranged in a ribbon-like distribution, which was originally deployed by operators for high core count feeder fiber optic cables in order to maximize density and minimize splicing time. Due to the special structural characteristics of the ribbon optical cable, its actual mechanical properties are also poor. Especially in terms of compressive resistance, bending resistance and torsion resistance, the performance is relatively limited, and if the external environment exerts a slightly larger force on it, it will cause serious damage to it.

Therefore, the torsion resistance of the ribbon cable can be improved through reasonable structural improvement, which can greatly improve the use effect and service life of the ribbon cable.

SUMMARY OF THE INVENTION

In order to solve the problems of poor twist resistance and easy damage after twisting, the present invention provides a ribbon cable.

The purpose of this invention is to:

1. Ensure that the tape cable has good basic mechanical properties;

2. Improve the anti-torsion performance of the ribbon cable.

In order to achieve the above objects, the present invention adopts the following technical solutions.

A ribbon cable comprising:

Sheath and core wire;

The sheath is provided with a central cavity, and the central cavity includes an inner cavity and an outer cavity;

The inner cavity is triangular in the radial section of the tape cable, the outer cavity is straight in the radial section of the tape cable, the inner end of the outer cavity is connected to the corner of the inner cavity, and the outer end is along the cable sheath. The radial direction extends outward;

The core wire comprises an outer inner bundle tube and an inner core part, the core part is embedded with a ribbon optical fiber, and the core wire abuts the inner cavity wall of the inner bundle tube outward;

The sheath is further provided with a buffer cavity;

The buffer cavity is arranged on the outside of the central cavity corresponding to the inner cavity side wall, the inner wall is a straight wall, and the outer wall is an arc-shaped wall.

As a preference,

A positioning line is arranged in the middle of the buffer cavity.

As a preference,

The positioning line abuts against the arched parts of the inner wall and the outer wall of the buffer cavity, and an oval wire cavity is arranged in the positioning line.

As a preference,

A reinforcing member is arranged in the wire cavity.

As a preference,

The reinforcing member is composed of an oval bundle tube and a metal wire. The long axis of the oval bundle tube is perpendicular to the long axis of the wire cavity on the radial section of the ribbon cable, and the metal wire abuts on the short axis of the oval bundle tube outward. direction on the inner wall.

As a preference,

The corners of the inner cavity are also provided with buffer lines correspondingly.

As a preference,

The buffer line is provided with a cross groove.

The beneficial effects of the present invention are:

Through reasonable structural improvement, the present invention enables the ribbon cable itself to have good basic mechanical properties such as compression resistance, and based on the structural characteristics of the ribbon cable itself, the present invention strengthens its anti-twist performance, so that when the ribbon cable is twisted, the optical fibers inside The straps reduce twisting and thus avoid damage.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Figure 2 is a schematic diagram of the dynamic deformation of the wire cavity and the elliptical bundle tube when the buffer cavity is deformed;

Figure 3 is a schematic diagram of the deformation of the inner cavity corner during the deformation of the cable sheath part;

In the picture: 100 sheath, 101 central cavity, 1011 inner cavity, 1012 outer cavity, 102 buffer cavity, 200 core wire, 201 inner bundle tube, 202 core part, 203 optical fiber ribbon, 300 positioning wire, 301 wire cavity, 302 reinforcement Pieces, 3021 oval bundle tube, 3022 metal wire, 400 buffer wire, 401 cross groove.

Detailed ways

The present invention will be further described and described in detail below with reference to specific embodiments and accompanying drawings. Those of ordinary skill in the art will be able to implement the present invention based on these descriptions. In addition, the embodiments of the present invention referred to in the following description are generally only some embodiments of the present invention, not all of the embodiments. Therefore, based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope 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", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined, the meaning of "several" means one or more.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two components or the interaction relationship between the two components, unless otherwise expressly qualified. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

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

Example

A ribbon cable as shown in Figure 1, which specifically includes:

Sheath 100 and core wire 200;

The sheath 100 is provided with a central cavity 101, and the central cavity 101 includes two parts, an inner cavity 1011 and an outer cavity 1012;

The inner cavity 1011 is triangular in the radial section of the ribbon cable, and the outer cavity 1012 is linear in the radial section of the ribbon cable. The radial direction of the cable jacket 100 extends outward;

The core wire 200 includes an outer inner bundle tube 201 and an inner core portion 202, and a ribbon optical fiber is embedded in the core portion 202, and the core wire 200 abuts the inner wall of the inner bundle tube 201 outward;

The sheath 100 is further provided with a buffer cavity 102;

The buffer cavity 102 is arranged on the outer side of the central cavity 101 corresponding to the side wall of the inner cavity 1011, the inner wall is a straight wall, and the outer wall is an arc-shaped wall, and the whole is a structure in which the middle part is arched outward on the radial section of the cable;

A positioning wire 300 is arranged in the middle of the buffer cavity 102, and the positioning wire 300 is used to realize the axial shaping of the ribbon cable and play the role of supporting the ribbon cable, which is the main rigid supporting part of the ribbon cable;

specific,

The positioning wire 300 abuts against the arched portions of the inner and outer walls of the buffer cavity 102. The positioning wire 300 is provided with an elliptical wire cavity 301. On the radial cross-section of the tape, the long axis of the wire cavity 301 is parallel to the lumen wall;

The wire cavity 301 is provided with a reinforcing member 302. The reinforcing member 302 is composed of an elliptical bundle tube 3021 and a metal wire 3022. The long axis of the elliptical bundle tube 3021 in the radial section of the cable is the same as the long axis of the wire cavity 301. Vertically, the metal wire 3022 acts as the main rigid part, which abuts on the inner wall of the elliptical bundle tube 3021 in the direction of the short axis outward.

Under the cooperation of the above structures, the ribbon cable of the present invention has basic compression resistance and good torsion resistance;

Due to the structural characteristics of the ribbon cable, its demand for improving the compression resistance of the cable is relatively limited, and twisting is one of the most common ways to cause damage to the ribbon cable. After the ribbon cable is twisted, the inner optical fiber ribbon 203 is very easy to tear. However, the existing ribbon cable cannot effectively avoid the damage to the optical fiber ribbon 203 caused by the twisting of the ribbon cable, especially the center-integrated ribbon cable. The optical fiber ribbons 203 are driven to twist and tear each other, which is very easy to cause the problem of fiber breakage. After the ribbon cable of the present invention is twisted, the compression of the sheath 100 will be reflected in the buffer cavity 102 and the outer cavity 1012, and the inner cavity 1011 is mainly the angle Further compression deformation occurs in the part to produce a buffer effect;

As shown in FIG. 2 , during the deformation process of the buffer cavity 102 , since the long axes of the wire cavity 301 of the positioning wire 300 and the elliptical bundle tube 3021 of the reinforcing member 302 are perpendicular to each other, when the outer wall of the buffer cavity 102 is compressed inward along the radial direction of the ribbon cable , the wire cavity 301 is compressed along its short axis direction, thereby driving the elliptical bundle tube 3021 of the reinforcing member 302 to rotate, and the metal wire 3022 forms a rigid support, blocking the inward extrusion force generated by the twisting of the sheath 100;

When the overall cable sheath 100 is twisted, it is decomposed into several processes such as deformation, extrusion, and guiding force. The deformation process is buffered by the buffer cavity 102, and the extrusion of the buffer cavity 102 drives the deformation of the positioning wire 300. At this time The elliptical bundle tube 3021 in the wire cavity 301 of the positioning wire 300 is further twisted to form a buffer, and after the cable is erected, the metal wire 3022 is pulled closer and straightened as the main rigid supporting part, which can effectively block the inward extrusion force effect conduction;

As shown in FIG. 3 , during the deformation of the rest of the cable sheath 100 , since the buffer cavity 102 is provided corresponding to the wall of the inner cavity 1011 , and the corner of the inner cavity 1011 is provided with an outer cavity 1012 , and the outer end of the outer cavity 1012 is provided with an outer cavity 1012 . First of all, the torsional deformation actually drives only a small amount of deformation of the corners of the inner cavity 1011 , so the circumferential torsional force can be effectively prevented from acting on the surface of the core wire 200 , so that the core wire 200 can always maintain a non-twisted state.

further,

The corners of the inner cavity 1011 are also correspondingly provided with buffer lines 400;

The buffer line 400 is provided with a cross groove 401;

The buffer wire 400 provided with the cross groove 401 has a space for inward contraction, and has the ability to assist in the axial shaping, avoiding the circumferential rotation of the inner cavity 1011, and the cross groove 401 will shrink when it is circumferentially twisted. so that the wire diameter of the buffer wire 400 is reduced;

This characteristic enables the buffer wire 400 to improve the structural stability of the inner cavity 1011, and at the same time, when the ribbon cable is subjected to a twisting force and conducts inwardly, it can further avoid the twisting force acting on the core wire 200, and compress the cable to a certain extent. By squeezing the buffer wire 400 , the twisting force is converted into a squeezing force, which acts on the core wire 200 , so as to avoid the circumferential rotation of the core wire 200 .

Claims (7)

1. A belt cable, comprising:

a sheath and a core;

the sheath is provided with a central cavity, and the central cavity comprises an inner cavity and an outer cavity;

the inner cavity is triangular on the radial section of the belt cable, the outer cavity is linear on the radial section of the belt cable, the inner end of the outer cavity is connected and communicated with the corner of the inner cavity, and the outer end of the outer cavity extends outwards along the radial direction of the belt cable sheath;

the core wire comprises an inner bundle tube of an outer layer and a core part of an inner layer, a ribbon fiber is embedded in the core part, and the core wire is outwards abutted to the inner cavity wall of the inner bundle tube;

the sheath is also provided with a buffer cavity;

the buffer cavity corresponds the inner chamber lateral wall and sets up in the central cavity outside, and its inner wall is straight wall, outer wall are the arc wall, wholly is the structure that the middle part outwards arches on the radial cross-section of ribbon cable.

2. A belt cable according to claim 1,

and a positioning line is arranged in the middle of the buffer cavity.

3. A belt cable according to claim 2,

the positioning line is abutted against the inner wall and the arched part of the outer wall of the buffer cavity, an elliptical line cavity is arranged in the positioning line, and the long axis of the line cavity is parallel to the inner cavity wall on the radial section of the belt cable.

4. A belt cable according to claim 3,

and a reinforcing piece is arranged in the wire cavity.

5. A belt cable according to claim 4,

the reinforcing piece is composed of an oval beam tube and a metal wire, the long axis of the oval beam tube is perpendicular to the long axis of the wire cavity on the radial cross section of the cable, and the metal wire is outwards abutted against the inner wall of the oval beam tube in the short axis direction.

6. A belt cable according to claim 1,

and buffer lines are correspondingly arranged at the corners of the inner cavity.

7. A belt cable according to claim 6,

and a cross groove is arranged in the buffer line.

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