CN112526686B

CN112526686B - Optical cable

Info

Publication number: CN112526686B
Application number: CN202011445641.XA
Authority: CN
Inventors: 张立永; 袁卿瑞
Original assignee: Hangzhou Futong Communication Technology Co Ltd
Current assignee: Hangzhou Futong Communication Technology Co Ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2023-05-05
Anticipated expiration: 2040-12-08
Also published as: CN112526686A

Abstract

The invention belongs to the field of communication infrastructures, and particularly relates to an optical cable. It comprises the following steps: an outer jacket, a reinforcement, an inner jacket, and an optical fiber; the outer sheath is provided with a sheath cavity, the inner sheath is arranged in the sheath cavity and is provided with an optical fiber cavity, and the optical fiber is arranged in the optical fiber cavity; the outer sheath is provided with a plurality of compression-resistant buffer cavities, and the reinforcing piece is arranged in the compression-resistant buffer cavities; the reinforcement comprises supporting section, inscription section and external section triplex, and the supporting section is the line or curve form, is one end opening, one end closed form structure, and the outside lateral wall in the outside butt resistance to compression buffer chamber of blind end, the inside butt resistance to compression buffer chamber inside wall of open end, inscription section connection extend to fillet department along resistance to compression buffer chamber inside wall at the both ends of supporting section open end, and external section laminating resistance to compression buffer chamber outside wall sets up and meets with inscription section in fillet department, and external section and the blind end separation of supporting section. The invention can obviously improve the compression resistance of the optical cable and reduce the weight of the optical cable.

Description

Optical cable

Technical Field

The invention belongs to the field of communication, and particularly relates to an optical cable.

Background

Fiber optic cable (optical fiber cable) is manufactured to meet optical, mechanical, or environmental performance specifications and is a communications cable assembly that utilizes one or more optical fibers disposed in a covering sheath as a transmission medium and that can be used alone or in groups.

The optical cable has the problem of being easily damaged after being subjected to the action of a large external force or bending. At present, in order to improve the compression resistance of the optical cable, a metal armor mode is mostly adopted to improve the compression resistance of the optical cable. But only the compressive property of the simple stratum stranded armored reinforced optical cable cannot realize a very excellent compressive protection effect on the optical cable. Meanwhile, the weight of the optical cable can be obviously increased due to the arrangement of the armor layer, so that the difficulty in covering the optical cable is increased, and the transportation cost is increased.

Disclosure of Invention

The invention provides an optical cable for solving the problems that the existing optical cable has limited compressive property, and the existing mode for improving the compressive property of the optical cable has the defects of poor protection effect or obviously increased weight of the optical cable and the like.

The invention aims at:

1. the compression resistance of the optical cable is improved;

2. the weight of the optical cable is reduced by adopting light materials.

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

An optical cable, comprising:

the outer sheath, the reinforcing piece, the inner sheath and the optical fiber are sequentially arranged from outside to inside;

the center of the outer sheath is provided with a sheath cavity along the axial direction of the optical cable, the inner sheath is arranged in the sheath cavity, the inner sheath is provided with an optical fiber cavity, and the optical fiber is arranged in the optical fiber cavity along the axial direction of the optical cable;

the outer sheath is circumferentially provided with a plurality of compression-resistant buffer cavities along the axial direction of the optical cable around the sheath cavity, and the reinforcing piece is arranged in the compression-resistant buffer cavities;

the side wall of the compression-resistant buffer cavity far away from the sheath cavity is an outer side wall, the side wall of the compression-resistant buffer cavity close to the sheath cavity is an inner side wall, and the outer side wall and the inner side wall are connected through a fillet;

the reinforcement comprises supporting section, inscription section and external section triplex, the supporting section is the line or curve form, be one end opening, one end closed form structure, blind end and open end are along the radial distribution of optical cable, the outside lateral wall in the outside butt resistance to compression buffer chamber of blind end, the inside butt resistance to compression buffer chamber inside wall of open end, inscription section connection is along resistance to compression buffer chamber inside wall to fillet department extension at the both ends of supporting section open end, external section laminating resistance to compression buffer chamber outside wall sets up and meets with inscription section in fillet department, and external section and the separation of the blind end of supporting section.

As a preferred alternative to this,

the outer side walls of the compression-resistant buffer cavities are all arranged on the outer side wall of a virtual pipe body with a circular section, and the axle center of the virtual pipe body is coincident with the axle center of the optical cable;

the inside wall in resistance to compression cushion chamber divide into arc section and straight section, and the arc section setting is in the middle section of inside wall, each resistance to compression cushion chamber's inside wall arc section all is located on the inside wall of virtual body, the angle of arc section is less than the angle of lateral wall, and straight section is connected at arc section both ends and is crossing with optical cable radius direction.

As a preferred alternative to this,

the thickness of the tube wall of the virtual tube body is 20-40% of the radius of the optical cable.

As a preferred alternative to this,

the both ends of reinforcement support section open end butt resistance to compression cushion chamber inside wall arc section respectively the both ends, the straight section setting of inside wall in resistance to compression cushion chamber is laminated to the inscription section of reinforcement.

As a preferred alternative to this,

the part of the outer side wall of the compression-resistant buffer cavity, which is covered by the closed end of the supporting section and the external section in a joint or abutting way, accounts for 30-45% of the section length of the outer side wall.

As a preferred alternative to this,

the inner sheath cross-section is fillet regular triangle, and it is equipped with straight lateral wall and fillet lateral wall, and the inner wall in every fillet lateral wall circumscribed sheath chamber just towards a resistance to compression cushion chamber.

As a preferred alternative to this,

the center of the straight side wall of the inner sheath is provided with buffer holes which are symmetrically arranged by taking the central line of the straight side wall as a symmetrical axis.

As a preferred alternative to this,

the round corner side wall of the inner sheath is provided with a spring hole, the spring hole is parallel to the axial direction of the optical cable, and a spring piece is arranged in the hole along the axial direction of the optical cable.

As a preferred alternative to this,

the inner wall of the optical fiber cavity of the inner sheath is further provided with a water-resistant layer.

The beneficial effects of the invention are as follows:

1) The compression resistance of the optical cable can be obviously improved, and the optical cable is not directly stressed by adopting a separated design;

2) The weight of the optical cable can be reduced.

Description of the drawings:

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

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

FIG. 3 is a schematic view of the inner jacket portion being subjected to force;

in the figure: 100 outer sheath, 101 sheath cavity, 102 compression-resistant buffer cavity, 1021 outer side wall, 1022 inner side wall, 1022a arc section, 1022b straight section, 1023 round angle, 200 inner sheath, 200a straight side wall, 200b round angle side wall, 201 buffer hole, 202 spring hole, 2021 spring piece, 203 optical fiber cavity, 2031 water-resisting layer, 300 optical fiber, 400 reinforcement, 401 support section, 401a first connection section, 401b second connection section, 402 inner connection section, 403 external connection section, 500 virtual pipe body.

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 optical cable as shown in fig. 1, comprising, in order from outside to inside:

outer jacket 100, strength members 400, inner jacket 200, and optical fibers 300;

the optical fiber 300 is a single-mode optical fiber or a multimode optical fiber or an optical fiber bundle, the inner sheath 200 is provided with an optical fiber cavity 203, and the optical fiber 300 is axially arranged in the optical fiber cavity 203 along the optical cable;

the center of the outer sheath 100 is provided with a sheath cavity 101 along the axial direction of the optical cable, the inner sheath 200 is arranged in the sheath cavity 101, the outer sheath 100 is circumferentially provided with a plurality of compression-resistant buffer cavities 102 along the axial direction of the optical cable around the sheath cavity 101, and the reinforcing piece 400 is arranged in the compression-resistant buffer cavities 102;

the geometric center of the radial section of the outer sheath 100 is located on the axis of the optical cable, so as to ensure that the inner sheath 200 can be located at the center of the optical cable, and the optical fiber 300 in the inner sheath 200 is protected at all angles;

the compression-resistant buffer cavity 102 is uniformly arranged around the circumference of the sheath cavity 101, the radial section of the compression-resistant buffer cavity is fan-shaped, the side wall far away from the sheath cavity 101 is an outer side wall 1021, the side wall close to the sheath cavity 101 is an inner side wall 1022, the outer side wall 1021 and the inner side wall 1022 are connected through a round angle 1023, and the round angle 1023 is connected, so that the outer side wall 1021 and the inner side wall 1022 can be effectively prevented from cracking along the circumference of the optical cable after the optical cable is stressed;

the outer side wall 1021 and the inner side wall 1022 are curved, the outer side walls 1021 of the compression-resistant buffer chambers 102 are all positioned on the outer side wall 1021 of a virtual pipe body 500 with a circular section, and the axis of the virtual pipe body 500 coincides with the axis of the optical cable;

the inner side wall 1022 is divided into an arc section 1022a and a straight section 1022b, the arc section 1022a is disposed in the middle section of the inner side wall 1022, the arc sections 1022a of the inner side walls 1022 of the compression-resistant buffer chambers 102 are all located on the inner side wall 1022 of the virtual pipe 500, and the angle of the arc sections 1022a is smaller than that of the outer side wall 1021;

the larger the wall thickness of the virtual tube 500, i.e. the larger the radial distance between the inner side wall 1022 and the outer side wall 1021 of the compression-resistant buffer cavity 102, the more excellent the compression-resistant buffer effect is theoretically, because the larger the distance is, the larger the deformable compression amount is, when the compression-resistant buffer cavity 102 is deformed and compressed, the external force acting on the optical cable can be continuously absorbed and converted to form the buffer compression-resistant effect, so that a good protection effect can be generated on the internal optical fiber, but in practice, the compression-resistant effect can be reduced after the wall thickness is larger than a certain value, because the larger the distance is, the inward collapse of the surface of the optical cable is easily caused, and the optical cable is deformed. Tests show that when the pipe wall thickness of the virtual pipe body 500 is 20-40% of the optical cable radius, the generated compression resistance effect and deformation resistance effect are comprehensively optimal, and in the embodiment, the pipe wall thickness of the virtual pipe body 500 is about 35% of the optical cable radius;

the straight section 1022b of the inner side wall 1022 of the compression-resistant buffer cavity 102 is intersected with the radial direction of the optical cable, the straight section 1022b and the optical cable are not parallel to each other, and the inner side wall 1022 of the compression-resistant buffer cavity 102 is formed in a manner of matching the arc section 1022a and the straight section 1022b, so that the radial section of the compression-resistant buffer cavity 102 is shaped like a fish scale, and compared with a pure fan-shaped structure, the compression-resistant buffer cavity 102 is easier to flatten when being compressed and deformed in the radial direction due to stress, namely the inward force guiding effect is weakened, and the compression-resistant buffer effect is better;

as shown in fig. 1, the reinforcement 400 is a special-shaped structural member, and is formed by three parts of a supporting section 401, an inner connecting section 402 and an outer connecting section 403, wherein the supporting section 401 is in a fold line shape or curve shape, and can be in a fold line shape structure with one end open and one end closed, such as a V shape or shape, or in a u-shaped curve shape structure, the closed end and the open end of the supporting section are distributed along the radial direction of the optical cable, the closed end is far away from the sheath cavity 101 and is in outward abutting connection with the outer side wall 1021 of the compression buffer cavity 102, the open end faces the sheath cavity 101, and the two ends of the open end are in respective abutting connection with the two ends of the arc-shaped section 1022a of the inner side wall 1022 of the compression buffer cavity 102, as shown in fig. 1, the tip end of the supporting section 401 is in a closed end and is in outward abutting connection with the middle part of the outer side wall 1021 of the compression buffer cavity 102, and the two ends of the arc-shaped section 1022a of the supporting section 401 are in abutting connection with the straight section 1022 b;

the inner connecting section 402 is connected to two ends of the opening end of the supporting section 401 and is arranged to be attached to a straight section 1022b of an inner side wall 1022 of the compression-resistant buffer cavity 102, the inner connecting section 402 extends to a round angle 1023 joint along the straight section 1022b of the inner side wall 1022 of the compression-resistant buffer cavity 102 from the joint of the straight section 1022b and the arc-shaped section 1022a, the round angle 1023 joint is connected with the external connecting section 403, the external connecting section 403 is attached to an outer side wall 1021 of the compression-resistant buffer cavity 102 and extends to the closed end of the supporting section 401 along the joint of the round angle 1023 and is attached to the outer side wall 1021, but the external connecting section 403 is not connected with the closed end of the supporting section 401;

in the above structure, the part of the outer side wall 1021 of the compression-resistant buffer cavity 102, which is not covered by the closed end of the supporting section 401 and the external section 403 in a bonding or abutting manner, accounts for 55-70% of the section length of the outer side wall 1021, and the part of the outer side wall 1021, which is not covered in the embodiment, accounts for 60% of the length;

the adoption of the mode of partial lamination can form a three-point support for the compression buffer cavity 102, and simultaneously, after the separation of the external connection section 403 and the closed end of the support section 401 is set, the compression buffer cavity 102 and the reinforcement 400 can gradually approach the closed end of the support section 401 in the stress deformation process, so that the collapse problem of the outer side wall 1021 of the compression buffer cavity 102 is avoided, and a large amount of external force is absorbed through deformation and displacement, so that a good protection effect on the inside is realized.

By the reinforcement 400 provided in the above manner, a very excellent force-guiding pressure-resistant effect can be formed. As shown in fig. 2, the analysis was performed in the case where the optical cable was subjected to the external force F1. F1 is conducted inwards in the radial direction through the outer sheath 100, the compression-resistant buffer cavity 102 at the upper part of fig. 2 is a direct stressed part, the outer side wall 1021 forms acting force F2 on the closed end of the supporting section 401 of the reinforcement 400 arranged in the compression-resistant buffer cavity 102, due to the matched arrangement of the supporting section 401 and the arc-shaped section 1022a of the inner side wall 1022, the closed end is close to the inner side wall 1022 in the radial direction after the supporting section 401 is acted by the acting force F2, but the open end of the supporting section 401 can not directly generate inward acting force on the inner side wall 1022 in the radial direction or the direction of the acting force F2, but a certain deformation trend is generated in the direction a in fig. 2, namely the open end of the supporting section 401 can be opened and enlarged, and the round corner 1023 of the compression-resistant buffer cavity 102 can be tilted outwards in the direction b after the supporting section 401 is opened, the round corner 1023 of the compression-resistant buffer cavity 102 is connected with the open end of the supporting section 401, one end of the outer section 403 is gradually close to the supporting section 401 until the end is abutted, the open end of the reinforcement 400 and the buffer cavity 102 reaches the compression-resistant buffer cavity 102, and the compression-resistant buffer cavity 102 can reach the compression-resistant buffer effect of the compression-resistant buffer cavity 400 and the compression-resistant buffer cavity 400 can reach the compression-resistant deformation limit of the compression-resistant buffer 1 greatly before the compression-resistant buffer cavity 102 is greatly deformed in the compression-resistant buffer cavity 1. The external force F1 applied to the lower portion of fig. 2 forms a symmetrical component force F3 to the compression buffer cavities 102 on the left and right sides, and under the action of the component force, the connection between the inner joint section 402 and the outer joint section 403 of the lower portion of the reinforcement member 400 in the compression buffer cavity 102 is respectively stressed and spread, wherein the inner joint section 402 of the lower portion of the reinforcement member 400 generates a certain deformation displacement along the d direction, the outer joint section 403 generates a certain deformation displacement along the e direction, and the support section 401 in the middle portion generates a certain displacement along the F direction, however, the displacement deformation trend generated by the first connection section 401a and the second connection section 401b on the two sides of the support section 401 is different, which is mainly due to the fact that the deformation of the upper compression buffer cavity 102 drives the round corner 1023 connection on the upper sides of the compression buffer cavities 102 on the left and right sides to generate a certain amount of deformation along the g direction, and the action of the external force F1 on the inner sheath 200 and the optical fiber 300 in the inner sheath 200 is buffered by the deformation of the compression buffer cavities 102 on the left and right sides of the reinforcement member 400.

Further, the method comprises the steps of,

as shown in fig. 3, under the action of the external force F1, the sheath cavity 101 of the outer sheath 100 is partially subjected to the acting forces mainly comprising F4, F5 and F6, wherein the force F4 is formed by the conduction of the force F2, the force F5 is formed by the conduction of the force F3, and the force F6 is generated by the deformation of the compression-resistant buffer cavities 102 on the left and right sides in fig. 2, and the cable is easily aged due to the existence of the deformation trend, so that the inner sheath 200 is further improved. The radial cross section of the improved inner sheath 200 is shown in fig. 1, 2 and 3, and is a rounded regular triangle, which is provided with a straight side wall 200a and rounded side walls 200b, each rounded side wall 200b circumscribes the inner wall of the sheath cavity 101 and faces one compression-resistant buffer cavity 102, under the action of forces F4, F5 and F6, the sheath cavity 101 of the outer sheath 100 has a tendency of deforming from a circle to a rounded triangle, and the inner sheath 200 is set into the rounded regular triangle, which can be matched with the deformation trend of the sheath cavity 101, so that the acting force of the inner sheath 200 due to the deformation of the sheath cavity 101 is reduced.

Still further, the method comprises the steps of,

the center of the straight side wall 200a of the inner sheath 200 is provided with a buffer hole 201 symmetrically arranged by taking the central line of the straight side wall 200a as a symmetry axis, the buffer hole 201 is arranged parallel to the axial direction of the optical cable, the buffer hole 201 can be filled with gas, the round-angle side wall 200b of the inner sheath 200 is provided with a spring hole 202, the spring hole 202 is arranged parallel to the axial direction of the optical cable, the hole is internally provided with a spring piece 2021 along the axial direction of the optical cable, and the buffer compression resistance effect of the inner sheath 200 can be further improved by the arrangement of the buffer hole 201 and the spring hole 202;

the inner wall of the optical fiber cavity 203 of the inner sheath 200 is further provided with a water-blocking layer 2031, the water-blocking layer 2031 can protect the optical fiber 300 from moisture, and the optical fiber 300 is filled in the water-blocking layer 2031.

Claims

1. An optical cable, comprising:

2. An optical cable according to claim 1, wherein,

3. An optical cable according to claim 2, wherein,

4. An optical cable according to claim 1, wherein,

5. An optical cable according to claim 1, wherein,

6. An optical cable according to claim 1, wherein,

7. An optical cable according to claim 6, wherein,

8. An optical cable according to claim 6, wherein,

9. An optical cable according to claim 1, wherein,