CN112526686A

CN112526686A - Optical cable

Info

Publication number: CN112526686A
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: 2021-03-19
Anticipated expiration: 2040-12-08
Also published as: CN112526686B

Abstract

The invention belongs to the field of communication infrastructure, and particularly relates to an optical cable. It includes: an outer jacket, a strength member, 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 jacket is provided with a plurality of compression-resistant buffer cavities, and the reinforcing piece is arranged in the compression-resistant buffer cavities; the reinforcement is by supporting the section, inscription section and external section triplex constitute, it is broken line shape or curved type to support the section, be one end opening, the closed column structure of one end, the lateral wall of the outside butt resistance to compression cushion chamber of blind end, the inside butt resistance to compression cushion intracavity lateral wall of open end, inscription section is connected and is extended to fillet department along resistance to compression cushion intracavity lateral wall at the both ends of supporting the section open end, external section laminating resistance to compression cushion chamber lateral wall sets up and meets with the inscription section in fillet department, and the blind end separation of external section and support 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

Optical fiber cables (optical fiber cables) are manufactured to meet optical, mechanical, or environmental performance specifications and are telecommunication cable assemblies that utilize one or more optical fibers disposed in a surrounding jacket as the transmission medium and that may be used individually or in groups.

The optical cable has the problem that the optical cable is easy to damage under the action of large external force or after being bent. At present, in order to improve the compression resistance of the optical cable, the compression resistance of the optical cable is improved mostly in a metal armor mode. However, the pressure resistance of the simply layer-stranded armored reinforced optical cable is not very good, and the optical cable cannot be protected against pressure. Meanwhile, the weight of the optical cable can be obviously increased due to the arrangement of the armor layer, so that the covering difficulty of the optical cable is increased, and the transportation cost is increased.

Disclosure of Invention

The invention provides an optical cable, aiming at solving the problems that the existing optical cable has limited compression resistance, and the existing mode for improving the compression resistance of the optical cable has the defects of poor protection effect, obvious increase of the weight of the optical cable and the like.

The invention aims to:

firstly, the compression resistance of the optical cable is improved;

and secondly, the weight of the optical cable is reduced by adopting light materials.

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

An optical cable, comprising:

the outer sheath, the reinforcement, the inner sheath and the optical fiber are arranged from outside to inside in sequence;

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

a plurality of compression-resistant buffer cavities are formed in the outer sheath in the circumferential direction 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 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 support section, inscription section and external section triplex, support the section and be broken line shape or curved type, be one end opening, the closed column structure of one end, blind end and open end radially distribute along the optical cable, the lateral wall of the outside butt resistance to compression cushion chamber of blind end, the inside butt resistance to compression cushion chamber of open end, inscription section is connected and is extended to fillet department along resistance to compression cushion chamber lateral wall at the both ends of supporting the section open end, external section laminating resistance to compression cushion chamber lateral wall sets up and meets with the inscription section in fillet department, and the blind end separation of external section and support section.

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

the outer side walls of the compression-resistant buffer cavities are all positioned on the outer side wall of a virtual pipe body with a circular cross section, and the axis of the virtual pipe body is superposed with the axis of the optical cable;

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

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

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

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

the both ends of reinforcement support section open end butt resistance to compression cushion chamber inner wall segmental arc's both ends respectively, the straight section setting of inside wall of the inner connecting section laminating resistance to compression cushion chamber of reinforcement.

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

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

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

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

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

the center of the straight side wall of the inner sheath is provided with a buffer hole which is symmetrically arranged by taking the center line of the straight side wall as a symmetry axis.

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

the fillet lateral wall of inner sheath is equipped with the spring hole, and the spring hole is on a parallel with the optical cable axial setting, and is provided with the spring part downthehole along the optical cable axial.

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

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

The invention has the beneficial effects that:

1) the compression resistance of the optical cable can be obviously improved, and the optical cable is not directly stressed due to the adoption of a separated design;

2) the light weight of the optical cable can be realized, and the weight of the optical cable is reduced.

Description of the drawings:

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

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

FIG. 3 is a schematic view of a portion of the inner sheath under force;

in the figure: 100 oversheath, 101 sheath chamber, 102 resistance to compression cushion chamber, 1021 lateral wall, 1022 inside wall, 1022a segmental arc, 1022b straight section, 1023 fillet, 200 inner sheath, 200a straight side wall, 200b fillet lateral wall, 201 buffering hole, 202 spring hole, 2021 spring part, 203 optic fibre chamber, 2031 water-blocking layer, 300 optic fibre, 400 reinforcement, 401 support section, 401a first linkage segment, 401b second linkage segment, 402 inscription section, 403 external connection section, 500 virtual body.

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

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

the optical fiber 300 is a single-mode optical fiber or a multi-mode 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 arranged in the optical fiber cavity 203 along the axial direction of the optical cable;

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

the geometric center of the radial section of the outer sheath 100 is positioned on the axis of the optical cable so as to ensure that the inner sheath 200 can be positioned at the central position of the optical cable and protect the optical fiber 300 in the inner sheath 200 in a full angle;

the compression-resistant buffer cavities 102 are uniformly arranged around the circumference of the sheath cavity 101, the radial cross sections of the compression-resistant buffer cavities are similar to fan shapes, 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 fillet 1023, and the fillet 1023 can effectively prevent the outer side wall 1021 and the inner side wall 1022 from cracking along the circumference after the optical cable is stressed;

the outer side wall 1021 and the inner side wall 1022 are both in a curve shape, the outer side walls 1021 of the plurality of pressure-resistant buffer cavities 102 are all positioned on the outer side wall 1021 of a virtual pipe body 500 with a circular cross section, and the axis of the virtual pipe body 500 is superposed with the axis of the optical cable;

the inner side wall 1022 is divided into an arc-shaped section 1022a and a straight section 1022b, the arc-shaped section 1022a is disposed in a middle section of the inner side wall 1022, the arc-shaped section 1022a of the inner side wall 1022 of each anti-compression buffer cavity 102 is located on the inner side wall 1022 of the virtual pipe body 500, and an angle of the arc-shaped section 1022a is smaller than that of the outer side wall 1021;

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

the straight section 1022b of the inner side wall 1022 of the compression-resistant buffer cavity 102 is intersected with the radial radius 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 that the arc-shaped section 1022a and the straight section 1022b are matched, so that the radial section of the compression-resistant buffer cavity 102 is similar to a fish scale shape, and compared with a pure sector structure, the compression-resistant buffer cavity 102 is easier to crush when stressed and compressed and deformed along the radial direction, namely, the inward force guiding effect is weakened, and the compression;

as shown in fig. 1, the reinforcing member 400 is a special-shaped structural member, and is composed of three parts, i.e., a supporting section 401, an internal connecting section 402 and an external connecting section 403, wherein the supporting section 401 is in a zigzag shape or a curved shape, can be in V-shape or V-21274shape, etc., and can be in folded line-shaped structure whose one end is open and one end is closed, also can be in U-shaped curve-shaped structure, the closed end and the open end are distributed along the radial direction of the optical cable, the closed end is far away from the sheath cavity 101 and is outwards abutted to the outer side wall 1021 of the compression-resistant buffer cavity 102, the open end faces the sheath cavity 101, the two ends of the open end are respectively abutted to the two ends of the arc-shaped section 1022a of the inner side wall 1022 of the compression-resistant buffer cavity 102, as shown in fig. 1, the embodiment adopts a V-shaped supporting section 401, the tip end of the support section 401 is a closed end and is outwards abutted against the middle part of the outer side wall 1021 of the compression-resistant buffer cavity 102, and the inner side opening and the two ends of the opening of the support section 401 are abutted against the connection part of the two ends of the arc-shaped section 1022a and the straight section 1022b of the inner side wall 1022 of the compression-resistant buffer cavity 102;

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

in the above structure, the portion of the outer sidewall 1021 of the compression-resistant buffer cavity 102, which is not covered by the close end of the supporting section 401 and the external section 403 in the attaching or abutting manner, occupies 55-70% of the length of the cross section of the outer sidewall 1021, and the uncovered portion of the outer sidewall 1021 in this embodiment occupies 60% of the length;

adopt the mode of part laminating can form "three point support" to resistance to compression cushion chamber 102, simultaneously, after external section 403 and the blind end separation setting of support section 401, the in-process that resistance to compression cushion chamber 102 and reinforcement 400 atress warp can make external section 403 be close to the blind end of support section 401 gradually, avoid the emergence of the problem of collapsing of resistance to compression cushion chamber 102 lateral wall 1021, absorb a large amount of external forces through deformation and displacement simultaneously, realize the good protection effect of internal.

The reinforcing member 400 provided in the above manner can provide a very excellent force-transmitting and pressure-resisting effect. As shown in fig. 2, the analysis was performed in the case where the optical cable was subjected to an external force F1. F1 is conducted inward along radial direction through the outer sheath 100, the crush-resistant buffer cavity 102 at the upper part of FIG. 2 is a direct stressed part, the outer side wall 1021 forms a force F2 to the closed end of the support section 401 of the reinforcement 400 arranged in the crush-resistant buffer cavity 102, due to the matching arrangement of the support section 401 and the arc-shaped section 1022a of the inner side wall 1022, the closed end of the support section 401 will be drawn close to the inner side wall 1022 along radial direction after receiving the force F2, but the open end of the support section 401 will not generate an inward force to the inner side wall 1022 directly along radial direction or the direction of the force F2, but will generate a certain deformation trend along the direction a in FIG. 2, that is, the open end of the support section 401 will be expanded and enlarged, and due to the structural matching of the crush-resistant buffer cavity 102 and the reinforcement 400, after the support section 401 is expanded, the inner section 402 and the open end of the support section 401 are deformed and displaced along the direction a, the, the end of the external connection section 403 far away from the internal connection section 402 is gradually close to the closed end of the support section 401 until abutting, the reinforcing piece 400 and the pressure-resistant buffer cavity 102 reach the deformation limit, and before the deformation limit is reached, the pressure-resistant buffer cavity 102 and the reinforcing piece 400 in the upper part of fig. 2 can generate extremely remarkable buffering and pressure-resistant effects on the external force of F1. The external force F1 applied to the lower portion of fig. 2 will form a symmetrical component F3 to the left and right compression-resistant buffer chambers 102, under the action of component force, the joints of the inner connecting section 402 and the outer connecting section 403 at the lower part of the reinforcing member 400 in the compression-resistant buffer cavity 102 are respectively stressed and spread, wherein the inner connecting section 402 of the lower part of the reinforcing member 400 generates a certain deformation displacement along the direction d, the outer connecting section 403 generates a certain deformation displacement along the direction e, while the support section 401 in the middle is displaced in the direction f, however, the first connection section 401a and the second connection section 401b on both sides of the support section 401 have different deformation tendencies, this is mainly because the deformation of the upper compression-resistant buffer cavity 102 drives the joint of the round corners 1023 at the upper sides of the compression-resistant buffer cavities 102 at the left and right sides to generate a certain amount of deformation along the g direction, the cable lower external force F1 is buffered by the deformation of the left and right crush chambers 102 and the strength members 400 against the inner jacket 200 and the optical fibers 300 in the inner jacket 200.

Further, in the above-mentioned case,

as shown in FIG. 3, under the action of an external force F1, the sheath cavity 101 of the outer sheath 100 is partially acted by action forces mainly including 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 formed by the deformation of the pressure-resistant buffer cavities 102 on the left and right sides in FIG. 2, and the cable is easily aged due to the deformation tendency, so that the inner sheath 200 is further improved. The radial section of the improved inner sheath 200 is shown in fig. 1, fig. 2 and fig. 3, and is a fillet regular triangle, which is provided with a straight side wall 200a and a fillet side wall 200b, each fillet side wall 200b is externally tangent to the inner wall of the sheath cavity 101 and faces to a pressure-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 the fillet triangle, the inner sheath 200 is set to be the fillet regular triangle, and can be matched with the deformation tendency 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.

In a still further aspect of the present invention,

the center of the straight side wall 200a of the inner sheath 200 is provided with a buffer hole 201 which is symmetrically arranged by taking the center line of the straight side wall 200a as a symmetry axis, the buffer hole 201 is arranged in parallel with the axial direction of the optical cable, gas can be filled in the buffer hole 201, the round side wall 200b of the inner sheath 200 is provided with a spring hole 202, the spring hole 202 is arranged in parallel with the axial direction of the optical cable, a spring part 2021 is arranged in the hole along the axial direction of the optical cable, and the arrangement of the buffer hole 201 and the spring hole 202 can further improve the buffer compression-resistant effect of the;

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

Claims

1. An optical cable, comprising:

2. An optical cable according to claim 1,

3. An optical cable according to claim 2,

4. An optical cable according to claim 1,

5. An optical cable according to claim 1,

6. An optical cable according to claim 1,

7. An optical cable according to claim 6,

8. An optical cable according to claim 6,

9. An optical cable according to claim 1,