CN114815103B

CN114815103B - 8-shaped optical cable

Info

Publication number: CN114815103B
Application number: CN202210487843.3A
Authority: CN
Inventors: 李国昌; 何园园
Original assignee: Futong Group Co Ltd
Current assignee: Futong Group Co Ltd
Priority date: 2022-05-06
Filing date: 2022-05-06
Publication date: 2023-05-09
Anticipated expiration: 2042-05-06
Also published as: CN114815103A

Abstract

The invention belongs to the field of optical cables, and particularly relates to an 8-shaped optical cable. It comprises the following steps: an upper monomer and a lower monomer; a reinforcement is arranged in the upper monomer; a plurality of optical fiber wires are arranged in the lower monomer; the upper monomer and the lower monomer are connected through a hanging strip structure; the sling structure comprises a main sling and an auxiliary sling; the upper end of the main sling forms a main sheath which is fully covered outside the reinforcing piece, the upper end of the auxiliary sling forms an auxiliary sheath which is covered outside the main sheath, the main sling and the auxiliary sling are respectively provided with a main through hole and an auxiliary through hole, and the main through hole and the auxiliary through hole are arranged in a staggered layer; the lower ends of the main suspender and the auxiliary suspender are respectively connected to two sides of the lower monomer, and the whole optical cable is distributed in a splayed shape on the section. The invention improves the structural strength of the hanging strip, changes the stress of the hanging strip part when the hanging strip part is acted by wind force through the arrangement of the main through holes and the auxiliary through holes, and inhibits the pendulum movement of the lower single body based on the change of the stress form so as to reduce the direct stress of the hanging strip part.

Description

8-shaped optical cable

Technical Field

The invention belongs to the field of optical cables, and particularly relates to an 8-shaped optical cable.

Background

The 8-shaped optical cable is totally called as an 8-shaped self-supporting optical cable, and is an optical cable suitable for long-distance communication and interoffice communication. The sling is composed of an upper monomer and a lower monomer which are connected by a sling, and has the characteristics of loading and bearing of the upper monomer and transmission and communication of the lower monomer.

However, in the existing 8-shaped optical cable, although the upper monomer bears force, the weight of the lower monomer is directly borne by the hanging strip in practice, and under the action of wind force, the lower monomer can generate obvious pendulum motion, so that the hanging strip part of the existing 8-shaped optical cable is easy to crack and even directly breaks.

Therefore, it is an important development to improve the existing 8-shaped optical cable to make the sling part structure have higher strength and stability.

Disclosure of Invention

The invention provides an 8-shaped optical cable, which aims to solve the problems that the strength of the existing 8-shaped optical cable hanging strip serving as a part mainly and directly bearing the acting force of a lower monomer is low and the existing 8-shaped optical cable hanging strip is easy to crack and damage.

The invention aims at:

1. the bearing form of the hanging belt is changed, and the bearing threshold value of the hanging belt is improved;

2. the sling has higher structural strength through the structural improvement of the sling;

3. through the internal structural improvement of the lower monomer, the movement amplitude of the pendulum is reduced when the lower monomer is acted by wind power, so that the pulling acting force born by the sling part is reduced.

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

An 8-fiber cable comprising:

an upper monomer and a lower monomer;

the upper monomer is internally provided with a reinforcing piece for axial guiding and shaping and plays a main supporting role;

a plurality of optical fiber wires are arranged in the lower monomer;

the upper monomer and the lower monomer are connected through a sling structure to form an 8-shaped optical cable with a specific parallel double-axis structure;

the sling structure comprises a main sling and an auxiliary sling;

the upper end of the main sling forms a main sheath which is fully covered outside the reinforcing piece, the upper end of the auxiliary sling forms an auxiliary sheath which is covered outside the main sheath, the main sling and the auxiliary sling are respectively provided with a main through hole and an auxiliary through hole, and the main through hole and the auxiliary through hole are arranged in a staggered layer;

the lower ends of the main suspender and the auxiliary suspender are respectively connected to two sides of the lower monomer, and the whole optical cable is distributed in a splayed shape on the section.

As a preferred alternative to this,

the optical fiber wire is formed by an optical fiber bundle formed by wrapping a single optical fiber or a plurality of optical fibers by a non-woven fabric wrapping belt.

As a preferred alternative to this,

the main through holes and the auxiliary through holes are rectangular holes intermittently arranged along the axial direction of the optical cable.

As a preferred alternative to this,

the lower single body is internally provided with a central cavity, the central cavity is a circular cavity, and a plurality of optical fiber wires are coated by the beam tube and then are arranged in the central cavity.

As a preferred alternative to this,

the beam tube is of a double-layer structure, and is respectively a protection tube directly wrapped on the outer side of the optical fiber wire and a buffer tube on the outer side of the protection tube;

the outer surface of the protection tube is meshed with the tooth structure circumferentially arranged on the inner surface of the buffer tube, and the length of a key slot of the tooth structure is greater than the tooth width, so that vacancy meshing is formed.

As a preferred alternative to this,

the friction coefficient between the outer surface of the protective tube and the inner surface of the buffer tube is less than 0.2.

As a preferred alternative to this,

the outer surface of the buffer tube is frosted.

As a preferred alternative to this,

the outside of the beam tube is also provided with a central tube with an oval section, the inner wall surface of the central cavity is provided with a wear-resistant layer, the outer walls of the two ends of the central tube in the long axis direction of the section are abutted on the wear-resistant layer, and the outer walls of the beam tube are abutted on the inner walls of the two ends of the central tube in the short axis direction.

The beneficial effects of the invention are as follows:

1) Through the cooperation of the double hanging strips, the structural strength of the hanging strips is improved, the stress of the hanging strip part when the hanging strip part is acted by wind force is changed through the arrangement of the main through holes and the auxiliary through holes, and the pendulum movement of the lower single body is restrained based on the change of the stress form, so that the direct stress of the hanging strip part is reduced;

2) Through the structural improvement of the lower single body, the pendulum movement of the lower single body is restrained by the internal structure of the lower single body, and the stress of the structure part of the sling can be obviously reduced after the pendulum movement of the lower single body is restrained, so that the lower single body has higher structural stability.

Description of the drawings:

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

FIG. 2 is a schematic diagram of the stress of the optical cable of the present invention under the action of wind;

FIG. 3 is an enlarged schematic view of portion A of FIG. 1;

FIG. 4 is a schematic view of a locally enlarged strap structure with intermittent arrangement of primary and secondary through holes; the method comprises the steps of carrying out a first treatment on the surface of the

In the figure: 100 upper monomer, 101 auxiliary sheath, 102 main sheath, 103FRP reinforcement, 200 lower monomer, 201 central cavity, 202 wear-resisting layer, 300 suspender, 301 auxiliary suspender, 3011 auxiliary through hole, 302 main suspender, 3021 main through hole, 400 optical fiber line, 500 bundle pipe, 501 buffer pipe, 502 protection pipe, 503 tooth, 504 key slot, 600 central tube.

The specific embodiment is as follows:

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

An 8-shaped optical cable as shown in fig. 1, which specifically comprises:

the upper cable monomer and the lower cable monomer are respectively an upper monomer 100 and a lower monomer 200, the upper monomer 100 is internally provided with an FRP reinforcement 103 for axial guiding and shaping and plays a main supporting role, and the lower monomer 200 is internally provided with a plurality of optical fiber wires 400;

the optical fiber wire 400 is formed by an optical fiber bundle formed by wrapping a single optical fiber or a plurality of optical fibers with a non-woven fabric wrapping tape;

the upper unit 100 and the lower unit 200 are connected through a hanging strip 300 structure to form an 8-shaped optical cable with a specific parallel double-axis structure;

the sling 300 structure includes a main sling 302 and a secondary sling 301;

the upper end of the main sling 302 is provided with a main sheath 102 which is entirely coated outside the FPR reinforcement, the upper end of the auxiliary sling 301 is provided with an auxiliary sheath 101 which is coated outside the main sheath 102, and a double-layer sheath structure which can rotate relatively is formed outside the FRP reinforcement 103;

the main hanging strip 302 and the auxiliary hanging strip 301 are respectively provided with a main through hole 3021 and an auxiliary through hole 3011, the main through hole 3021 and the auxiliary through hole 3011 are arranged in a staggered manner, and are respectively arranged at different horizontal heights, for example, the horizontal position of the main through hole 3021 is lower than that of the auxiliary through hole 3011 in the embodiment;

the main through hole 3021 and the auxiliary through hole 3011 are rectangular holes intermittently arranged along the axial direction of the optical cable as shown in fig. 4;

the lower ends of the main suspender 302 and the auxiliary suspender 301 are respectively connected to two sides of the lower single body 200, and the whole optical cable is distributed in a splayed shape on the section;

a central cavity 201 is arranged in the lower unit 200, the central cavity 201 is a circular cavity, and a plurality of optical fiber wires 400 are wrapped by a beam tube 500 and then are arranged in the central cavity 201.

The conventional 8-shaped optical cable is that the upper monomer 100 and the lower monomer 200 are connected in a way of directly communicating by adopting a single hanging strip 300, and the arrangement mode can form a complete and closed wind shielding surface, so that under the action of environmental wind force, the upper monomer 100 can keep relatively stable due to tensioning, but the lower monomer 200 can continuously perform pendulum motion, so that the upper monomer 100 and the hanging strip 300 are pulled, and the upper monomer 100 and the hanging strip 300 of the conventional 8-shaped optical cable are easy to damage;

through researches, the hanging strip 300 is provided with a through hole, so that part of wind force can pass through the through hole when the optical cable is acted by wind force, and therefore, the amplitude of the pendulum motion of the lower single body 200 can be reduced, but the arrangement of the through hole can lead to the reduction of the structural strength of the single body, the reduction of the damage rate of the upper single body 100 and the further increase of the damage rate of the hanging strip 300;

in the technical scheme of the invention, a double-sling 300 formed by a main sling 302 and a secondary sling 301 is matched in structure, and a main through hole 3021 and a secondary through hole 3011 are respectively arranged to form a connecting structure with gas permeability, so as to connect an upper monomer 100 and a lower monomer 200;

as shown in fig. 2, in the above structure, a buffer space is generated between the main sling 302 and the auxiliary sling 301, in the structure of the single sling 300, wind force drives the lower single body 200 to generate a pendulum motion, after the buffer space is formed inside by the cooperation of the splayed main sling 302 and the auxiliary sling 301, the main sling 302 and the auxiliary sling 301 respectively drive the lower single body 200 to generate two opposite motion trends, i.e. as in the embodiment, the main sling 302 is acted by wind force, the main sling 302 drives the lower single body 200 to generate a pendulum motion in a counterclockwise direction, i.e. to provide a force acting in a counterclockwise direction by the single body 100 above the lower single body 200, at the same time, the pressure in the buffer space is increased to generate an action in a direction of the auxiliary sling 301, and meanwhile, an airflow is generated at the auxiliary through hole 3011, so that the pressure outside the auxiliary through hole 3011 is reduced to form a pressure difference, and the auxiliary sling 301 is expanded outwards to bulge, thereby drive the single body 200 to rotate clockwise by taking the single body 100 above the single body 100 as a rotation axis;

finally, the acting forces of the main sling 302 and the auxiliary sling 301 on the lower single body 200 can be offset to a certain extent, so that the trend of the lower single body 200 to do pendulum motion under the action of wind force is restrained.

Further, the method comprises the steps of,

as shown in fig. 3, the bundle tube 500 has a double-layer structure, and is respectively a protection tube 502 directly wrapped around the outside of the optical fiber 400 and a buffer tube 501 outside the protection tube 502;

the friction coefficients of the outer surface of the protection tube 502 and the inner surface of the buffer tube 501 are smaller than 0.2, the two are meshed through teeth 503, namely, the outer surface of the protection tube 502 and the inner surface of the buffer tube 501 are provided with uniformly spaced teeth 503, key grooves 504 are formed between adjacent teeth 503, the length of each key groove 504 is larger than the width of each tooth 503, so that the teeth 503 and the key grooves 504 form vacancy meshing, namely, the teeth 503 and the key grooves 504 can mutually drive the two to rotate coaxially, but rotation delay exists, and the outer surface of the buffer tube 501 is frosted to increase the friction coefficient;

in addition, a central tube 600 with an elliptical cross section is arranged outside the beam tube 500, the surface of the inner wall of the central cavity 201 is provided with a wear-resistant layer 202, the outer walls of the two ends of the central tube 600 in the long axis direction of the cross section are abutted against the wear-resistant layer 202, and the outer walls of the beam tube 500 are abutted against the inner walls of the two ends of the central tube 600 in the short axis direction;

under the action of wind force, the kinetic energy and the moment are large when the lower monomer 200 moves per se, and the actual generated acting force is large, besides the fact that the upper monomer 100 and the hanging strip 300 are easily damaged due to the fact that the hanging strip 300 is driven by the structure of the hanging strip 200 to perform the pendulum motion, the moment is taken as a factor of inconvenient adjustment, and the moment cannot be effectively reduced at present, so that the moment generated when the lower monomer 200 is acted by wind force is reduced to form a key point;

according to the invention, through the cooperation of the structures, when the lower single body 200 generates the pendulum motion, the initial angular velocity of the two ends of the central tube 600 is the same but the linear velocity is different, so that the central tube 600 in the lower single body 200 generates the kinetic energy difference, and part of the kinetic energy is consumed in a friction mode in the rotation process, meanwhile, the buffer tube 501 is driven to rotate by the rotation of the central tube 600 due to the large friction coefficient of the outer surface of the buffer tube 501, so that the buffer tube 501 rotates relative to the protection tube 502, the collision of the tooth 503 structures meshed with the buffer tube 501 and the protection tube 502 can effectively and rapidly consume the kinetic energy, and the motion of the optical cable lower single body 200 is greatly restrained, and the central tube 600 also generates the bidirectional reciprocating rotation due to the pendulum motion generated by the lower single body 200, so that the teeth 503 between the buffer tube 501 and the protection tube 502 are driven to continuously collide, and the kinetic energy generated by the lower single body 200 under the wind force is consumed.

Claims

1. An 8-fiber cable, comprising:

an upper monomer and a lower monomer;

a plurality of optical fiber wires are arranged in the lower monomer;

the upper monomer and the lower monomer are connected through a sling structure to form an 8-shaped optical cable with a parallel double-axis structure;

the sling structure comprises a main sling and an auxiliary sling;

2. An 8-fiber cable according to claim 1, wherein,

3. An 8-fiber cable according to claim 1, wherein,

4. An 8-fiber cable according to claim 1, wherein,

5. An 8-fiber cable according to claim 4, wherein,

6. An 8-fiber cable according to claim 5, wherein,

7. An 8-fiber cable according to claim 5 or 6, wherein,

the outer surface of the buffer tube is frosted.

8. An 8-fiber cable according to claim 7, wherein,