CN113985542A - Long-distance aerial optical cable - Google Patents
Long-distance aerial optical cable Download PDFInfo
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- CN113985542A CN113985542A CN202111134704.4A CN202111134704A CN113985542A CN 113985542 A CN113985542 A CN 113985542A CN 202111134704 A CN202111134704 A CN 202111134704A CN 113985542 A CN113985542 A CN 113985542A
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Images
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
- G02B6/4432—Protective covering with fibre reinforcements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4415—Cables for special applications
- G02B6/4416—Heterogeneous cables
- G02B6/4422—Heterogeneous cables of the overhead type
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4415—Cables for special applications
- G02B6/4427—Pressure resistant cables, e.g. undersea cables
Abstract
The invention discloses a long-distance overhead optical cable which is sequentially provided with an optical unit, a framework, a reinforcing part, a buffer block and a sheath from inside to outside, wherein the cross section of the framework is circular, the center of the framework is provided with an axial through hole, the optical unit is radially arranged in the through hole, and the periphery of the framework is uniformly provided with a plurality of bulges at intervals; the reinforcing part is of a hollow annular structure, the framework is arranged inside the reinforcing part, a plurality of Y-shaped supporting parts are uniformly arranged on the inner side of the reinforcing part at intervals, each supporting part comprises a main framework and two first branch supports, the number of the supporting parts is equal to that of the protrusions on the outer side of the framework, the supporting parts correspond to the protrusions on the outer side of the framework one by one, the inner end of the main framework is a groove-shaped part, and the protrusions of the framework are embedded into the groove-shaped part; the buffer block is arranged in a gap between the two first sub-brackets of each Y-shaped supporting part; and the sheath is extruded on the outer surfaces of the buffer block and the reinforcing part. The optical cable has good compression resistance and distortion resistance effects, and can meet the use requirements of special environments such as accumulated snow, large wind power and the like.
Description
Technical Field
The invention belongs to the field of optical cables, and particularly relates to a long-distance overhead optical cable.
Background
Optical fiber cables are the most dominant medium for modern communications, and without the large-scale application of optical fiber cables, fiber to the home is silent. In some special environments with rare people, such as hills, mountains, rivers or deserts, the optical cable is usually routed in an aerial manner. The existing aerial optical cable is usually self-supporting, that is, a steel strand is arranged in the optical cable to improve the tensile strength of the optical cable.
However, the existing aerial optical cable is easily threatened by natural disasters such as typhoons, ice and snow, flood and the like, and the aerial optical cable is also easily influenced by external force, weakened mechanical strength and the like, so that the failure rate of the aerial optical cable is higher than that of a direct-buried and pipeline type optical cable, and the optical cable has increased shaking amplitude and serious distortion in an environment with strong wind power; in low temperature environment such as snow freezes, the optical cable receives pressure flagging, leads to optic fibre impaired easily, and snow also can lead to the optical cable distortion simultaneously to lead to optic fibre impaired, and in case optic fibre is impaired, the change degree of difficulty of aerial optical cable will be far higher than the buried optical cable.
In summary, the prior art has the following disadvantages: (1) the steel stranded wires are arranged in the optical cable, so that the weight of the optical cable is increased; (2) the compression resistance and the distortion resistance are weaker, the optical fiber is easy to damage, and the replacement difficulty is high.
Disclosure of Invention
Aiming at the problems, the invention overcomes at least one defect, provides a long-distance overhead optical cable, and solves the problems that the overhead optical cable in the prior art is heavy in weight, weak in compression resistance and distortion resistance, easy to damage the optical fiber and the like.
The technical scheme adopted by the invention is as follows:
a long-distance aerial optical cable is circular in cross section and is sequentially provided with an optical unit, a framework, a reinforcing part, a buffer block and a sheath from inside to outside;
the optical unit is a single-mode or multi-mode optical fiber, an optical fiber bundle or an optical fiber ribbon;
the light unit is axially arranged in the through hole, a plurality of bulges are uniformly arranged on the periphery of the framework at intervals, the number of the bulges is at least 3, and concave parts are formed among the bulges;
the reinforcing part is of an annular structure with a hollow interior, the framework is arranged at the hollow position in the reinforcing part, a plurality of Y-shaped supporting parts are uniformly arranged at the inner side of the reinforcing part at intervals, each supporting part is composed of a main framework and two first sub-supports, the number of the supporting parts is equal to that of the bulges on the outer side of the framework, the supporting parts correspond to the bulges on the outer side of the framework one by one, the inner end of the main framework is a groove-shaped part, the bulges of the framework are embedded into the groove-shaped part, the two first sub-supports of each Y-shaped supporting part extend towards two sides respectively to form a connecting part, so that the reinforcing part is of an integral structure, and a cavity is formed between the adjacent supporting parts;
the buffer block is arranged in a gap between the two first sub-supports of each Y-shaped supporting part, the inner surface of the buffer block is completely attached to the gap between the two first sub-supports of each Y-shaped supporting part, and the outer side surface of the buffer block is equal to the height of the connecting part and is in the same circle;
and the sheath is extruded on the outer surfaces of the buffer block and the reinforcing part.
Optionally, the skeleton comprises inside first skeleton and inlays and establish the second skeleton in first skeleton outside, the interior survey of first skeleton is the cavity, the optical unit sets up in the inside of first skeleton, first skeleton and second skeleton surface are all even, the interval is provided with the arch, form first concave part between the adjacent arch of first skeleton, form the second concave part between the adjacent arch of second skeleton, the interior survey of second skeleton is radially equipped with the draw-in groove equal with the protruding quantity of first skeleton along the optical cable, and the width of draw-in groove is greater than the bellied width of first skeleton, the protruding embedding of first skeleton is in the draw-in groove.
Optionally, the filling yarns are arranged between the second concave portions, the outer side surfaces of the filling yarns are arc-shaped, the outer side surfaces of the filling yarns between all the second concave portions are all located on an equal circle with the axis of the framework as the center of circle, and the height of the bulge is higher than that of the outer side surfaces of the filling yarns.
Optionally, a plurality of slots are formed in the second framework and are communicated with each other.
Optionally, the first framework and the buffer block are made of elastic materials.
Optionally, the second skeleton and the reinforcement part are made of CFRP or GFRP materials.
Optionally, the elastic material is TPU or MDPE.
Optionally, a buffer cavity is further disposed on the main framework of the Y-shaped support portion, and the cross-sectional area of the buffer cavity does not exceed 1/2 of the cross-sectional area of the main framework.
Optionally, the buffer blocks are connected through the buffer belt to form an integrated structure, and the inner surface of the buffer belt is attached to the connecting portion of the supporting portion.
Optionally, two sides of the main frame of each Y-shaped support portion are further provided with support pieces in an attached manner, the support pieces and the support portions are made of the same material, the inner ends of the support pieces and the inner ends of the support portions share one groove-shaped portion, and the outer ends of the support pieces are attached to the main frame and extend outwards until reaching the outer end of the first sub-support.
The invention has the beneficial effects that: the structure to aerial optical cable improves, avoids using steel strand wires, has alleviateed the weight of optical cable, when the optical cable received pressure, through the effect of skeleton and rib, can disperse and weaken pressure, designs special skeleton texture simultaneously, alleviates, avoids optic fibre pressurized, distortion impaired, has promoted resistance to compression, the antitorque effect of optical cable, can satisfy the operation requirement of special environment such as snow, wind-force are great.
Description of the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is another schematic structural view of the present invention;
FIG. 3 is a schematic representation of the skeletal structure of the present invention;
FIG. 4 is a schematic view of the present invention under force in one direction;
FIG. 5 is a schematic view of another aspect of the present invention;
fig. 6 is a schematic view of the invention under force in another direction.
The figures are numbered:
1. the light unit comprises a light unit body, 11, a through hole, 2, a framework, 21, a first framework, 211, a first concave part, 22, a second framework, 221, a second concave part, 222, a clamping groove, 3, a reinforcing part, 31, a main framework, 311, a groove-shaped part, 312, a buffer cavity, 32, a first sub-support, 33, a connecting part, 34, a supporting piece, 35, an extending part, 4, a buffer block, 5 and a sheath.
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," "abutted," "connected," "fixed," and the like are to be construed broadly, e.g., as being 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
The present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, a long-distance overhead optical cable has a circular cross section, and is provided with an optical unit 1, a framework 2, a reinforcing part 3, a buffer block 4 and a sheath 5 in sequence from inside to outside;
the skeleton center has axial through-hole 11, and the optical unit sets up in the through-hole along the axial, the periphery of skeleton is even, the spaced is provided with a plurality of archs, and bellied quantity has 3 at least, forms the recess between the arch, for the circularity of guaranteeing the optical cable, in this embodiment, still be provided with the filling yarn between the recess, the lateral surface of filling yarn becomes the arc, and the lateral surface of filling yarn between all recesses, all be in and use the skeleton axle center as the equipartition circle of centre of a circle, bellied lateral surface that highly is higher than the filling yarn, the optical unit is single mode or multimode fiber, fiber bundle or optical fiber ribbon.
Further, as shown in fig. 2, the framework is composed of an internal first framework 21 and a second framework 22 embedded outside the first framework, the internal side of the first framework is a cavity, the optical unit is arranged inside the first framework, the outer surfaces of the first framework and the second framework are uniform, protrusions are arranged at intervals, a first concave portion 211 is formed between every two adjacent protrusions of the first framework, a second concave portion 22 is formed between every two adjacent protrusions of the second framework, clamping grooves 222 equal to the number of the protrusions of the first framework are radially arranged on the internal side of the second framework along the optical cable, the width of each clamping groove is larger than the width of each protrusion of the first framework, the protrusions of the first framework are embedded into the clamping grooves, free rotation of a certain range can be carried out in the clamping grooves, and the specific structure is shown in fig. 3. When the optical cable is externally stressed or twisted, the first framework can rotate in the second framework to a certain degree, so that the optical fiber is dispersed, relieved or prevented from being stressed or twisted, and the optical fiber is prevented from being damaged.
Furthermore, a plurality of clamping grooves are formed in the inner side of the second framework along the radial direction of the optical cable, and are communicated with each other to form a large clamping groove.
As shown in fig. 1 and 2, the reinforcing part 3 is a ring structure with a hollow interior, the frame is arranged at the hollow position inside the reinforcing part, the inner side of the reinforcing part is uniformly provided with a plurality of supporting parts at intervals, each supporting part is in a Y shape and consists of a main frame 31 and two first sub-frames 32, the supporting parts are equal in number and correspond to the bulges on the outer side of the frame one by one, the inner end of the main frame is a groove part 311, the bulges of the frame are embedded into the groove part to realize the connection and fixation of the reinforcing part and the frame, a buffer block 4 is arranged in a gap formed between the two first sub-frames of each Y-shaped supporting part, the two first sub-frames extend towards two sides to form a connecting part 33, so that the reinforcing part is in an integral structure, the inner surface of the buffer block is completely attached to the gap between the two first sub-frames of each Y-shaped supporting part, the outer side surface is in the same circle as the connecting part, a cavity is formed between the adjacent supporting parts, and water blocking yarns can be selectively arranged in the cavity.
Furthermore, in order to improve the compression resistance and torsion resistance of the optical cable, the first framework and the buffer block are made of materials with certain elasticity, such as TPU or MDPE, and the second framework and the reinforcing part are made of CFRP or GFRP materials, wherein the CFRP or GFRP materials have the characteristics of high bending resistance, tensile strength and compression strength, stable performance, salt water resistance and chemical substance resistance, and are not influenced by acid rain, salt and the environment of most chemical substances, and the matrix is resin and has higher matching degree with common materials.
According to different use environments, different materials can be selected, and CFRP is selected in a larger area in wind, because the area with larger wind power, the shaking degree of the optical cable and the rotating frequency of the first framework are higher, static electricity is easy to generate, when the static electricity is accumulated more, the aging of the sheath is easy to accelerate, and due to the adoption of CFRP, the CFRP has certain conductivity, the charge is conductive to the leading-out; for example, in areas with heavy snow, the reinforcement is preferably GFRP because CFRP is more expensive.
Furthermore, in order to reduce the weight of the optical cable of the present invention, in this embodiment, the main frame of the "Y" shaped support portion is further provided with a buffer cavity 312, the shape of the buffer cavity is not particularly required, but the cross-sectional area of the buffer cavity does not exceed 1/2 of the cross-sectional area of the main frame.
In addition, the buffer blocks can be of a split structure, or can be connected with each other through the buffer belt to form an integral structure, and the inner surface of the buffer belt is attached to the connecting part of the supporting part.
In order to further improve the compression-resistant effect of the optical cable, two sides of the main framework of each Y-shaped supporting part are also provided with supporting pieces 34 in an attaching mode, the supporting pieces and the supporting parts are made of the same material, the inner ends of the supporting pieces and the inner ends of the supporting parts share a groove-shaped part, and the outer ends of the supporting pieces are attached to the main framework and extend outwards until reaching the outer end of the first sub-support.
The stress condition of the optical cable is analyzed in detail by combining fig. 4 and fig. 5, and when the optical cable of the invention is applied to an environment with large accumulated snow, the stress condition is discussed in two conditions: (1) when pressure (snow) is mainly concentrated on the connecting part (see fig. 4), the external force F is decomposed into a direct downward force F1 and forces F2 and F3 transmitted along the first sub-supports adjacent to the two "Y" -shaped supporting parts, and the force F2 is analyzed as a force F2, the force F2 is further decomposed into a force F21 along the main framework and a force F22 transmitted along the other first sub-support, the force F21 is continuously transmitted to the inner circumference and the radial direction of the optical cable, the force F22 is transmitted along the outer circumference of the optical cable until the force is dispersed to the whole optical cable, it is noted that when the force F21 and the force F31 along the main framework are further transmitted inward, partial force components along the circumference of the second framework are cancelled out (as F211 and F311 in the figure are opposite, the force is partially or totally cancelled), the rest force is transmitted inward to the first framework through the second framework, because the first framework is an elastic material, the transmitted force is greatly weakened, the damaged optical fiber is avoided, and in addition, in the process of force transmission, the first framework can rotate in the second framework to a certain extent due to uneven stress, and can also play a role of dispersing force to protect the optical fibers, when the force F1 is transmitted to the cavity inwards, the cavity is deformed to weaken the force to be continuously transmitted to the cavity inwards, and when supporting pieces are arranged on the two sides of the main framework, the supporting pieces further prevent the cavity from being deformed to form a strong compression-resistant effect; (2) when pressure (accumulated snow) is mainly concentrated on the buffer block (see fig. 5), force F is buffered by the buffer block, force F is weakened and decomposed into direct downward force F4 and forces F5 and F6 conducted along two first sub-brackets of a Y-shaped support part, forces F5 and F6 are conducted to the support sheets and the cavity, the cavity weakens the conduction of the force through deformation, the support sheets resist the conduction force, force F4 is conducted to the groove-shaped part along the main framework, part of the force is dispersed and conducted along the circumferential direction of the second framework, and part of the force is continuously conducted to the first framework along the radial direction of the second framework.
When the optical cable is applied to an environment with strong wind power, as shown in fig. 6, when the optical cable is subjected to strong wind from right to left, if the wind power above the optical cable is stronger than that below the optical cable, the optical cable tends to rotate counterclockwise, and inside the optical cable, the first framework has a certain degree of freedom of displacement inside the second framework, so that the first framework has a tendency of rotating clockwise, so that the relative position of the optical fiber is basically unchanged, and the optical fiber is not easily twisted.
Claims (10)
1. A long-distance overhead optical cable is round in cross section and is sequentially provided with an optical unit, a framework, a reinforcing part, a buffer block and a sheath from inside to outside,
the optical unit is a single-mode or multi-mode optical fiber, an optical fiber bundle or an optical fiber ribbon;
the light unit is axially arranged in the through hole, a plurality of bulges are uniformly arranged on the periphery of the framework at intervals, the number of the bulges is at least 3, and concave parts are formed among the bulges;
the reinforcing part is of an annular structure with a hollow interior, the framework is arranged at the hollow position in the reinforcing part, a plurality of Y-shaped supporting parts are uniformly arranged at the inner side of the reinforcing part at intervals, each supporting part is composed of a main framework and two first sub-supports, the number of the supporting parts is equal to that of the bulges on the outer side of the framework, the supporting parts correspond to the bulges on the outer side of the framework one by one, the inner end of the main framework is a groove-shaped part, the bulges of the framework are embedded into the groove-shaped part, the two first sub-supports of each Y-shaped supporting part extend towards two sides respectively to form a connecting part, so that the reinforcing part is of an integral structure, and a cavity is formed between the adjacent supporting parts;
the buffer block is arranged in a gap between the two first sub-supports of each Y-shaped supporting part, the inner surface of the buffer block is completely attached to the gap between the two first sub-supports of each Y-shaped supporting part, and the outer side surface of the buffer block is equal to the height of the connecting part and is in the same circle;
and the sheath is extruded on the outer surfaces of the buffer block and the reinforcing part.
2. The long-distance overhead optical cable according to claim 1, wherein the framework is composed of a first framework inside and a second framework embedded outside the first framework, the inner side of the first framework is a cavity, the optical units are arranged inside the first framework, the outer surfaces of the first framework and the second framework are uniform, protrusions are arranged at intervals, a first concave portion is formed between adjacent protrusions of the first framework, a second concave portion is formed between adjacent protrusions of the second framework, the inner side of the second framework is provided with clamping grooves equal to the number of protrusions of the first framework in the radial direction of the optical cable, the width of each clamping groove is larger than the width of the protrusion of the first framework, and the protrusions of the first framework are embedded in the clamping grooves.
3. A long-distance overhead optical cable according to claim 2, wherein the filling yarns are provided between the second recesses, the outer side surfaces of the filling yarns are curved, the outer side surfaces of the filling yarns between all the second recesses are on a same circle centered on the axis of the frame, and the height of the protrusion is higher than that of the outer side surfaces of the filling yarns.
4. The long-distance overhead optical cable according to claim 2, wherein a plurality of slots are formed in the second frame and communicate with each other.
5. The long-haul aerial optical cable of claim 2, wherein the first frame and the buffer block are made of an elastic material.
6. A long-haul aerial optical cable as claimed in claim 2, wherein said second backbone and strength member is CFRP or GFRP material.
7. A long-haul aerial optical cable as claimed in claim 5, wherein said elastomeric material is TPU or MDPE.
8. The long-distance overhead optical cable according to claim 1, wherein the main framework of the Y-shaped supporting part is further provided with a buffer cavity, and the cross-sectional area of the buffer cavity does not exceed 1/2 of the cross-sectional area of the main framework.
9. The long distance overhead cable according to claim 1, wherein the buffer blocks are connected to each other by a buffer tape, forming an integral structure, and an inner surface of the buffer tape is fitted to the connection portion of the support portion.
10. The long-distance aerial optical cable as claimed in claim 1, wherein support pieces are attached to both sides of the main frame of each Y-shaped support portion, the support pieces are made of the same material as the support portions, an inner end of each support piece and an inner end of each support portion share a groove, and an outer end of each support piece is attached to the main frame and extends outward to reach an outer end of the first sub-frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111134704.4A CN113985542A (en) | 2021-09-27 | 2021-09-27 | Long-distance aerial optical cable |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111134704.4A CN113985542A (en) | 2021-09-27 | 2021-09-27 | Long-distance aerial optical cable |
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| CN113985542A true CN113985542A (en) | 2022-01-28 |
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| CN202111134704.4A Withdrawn CN113985542A (en) | 2021-09-27 | 2021-09-27 | Long-distance aerial optical cable |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114706179A (en) * | 2022-04-06 | 2022-07-05 | 富通集团（嘉善）通信技术有限公司 | Wind-resistant optical cable |
| CN114924367A (en) * | 2022-05-30 | 2022-08-19 | 富通集团有限公司 | Impact-resistant optical cable |
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Application publication date: 20220128 |