CN117741883B - Layer-twisted type outdoor optical cable - Google Patents
Layer-twisted type outdoor optical cable Download PDFInfo
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- CN117741883B CN117741883B CN202410182001.6A CN202410182001A CN117741883B CN 117741883 B CN117741883 B CN 117741883B CN 202410182001 A CN202410182001 A CN 202410182001A CN 117741883 B CN117741883 B CN 117741883B
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- 239000010410 layer Substances 0.000 claims abstract description 62
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- 230000000712 assembly Effects 0.000 claims abstract description 4
- 238000000429 assembly Methods 0.000 claims abstract description 4
- 238000003825 pressing Methods 0.000 claims description 10
- 239000003063 flame retardant Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 239000000779 smoke Substances 0.000 claims description 8
- DXZMANYCMVCPIM-UHFFFAOYSA-L zinc;diethylphosphinate Chemical compound [Zn+2].CCP([O-])(=O)CC.CCP([O-])(=O)CC DXZMANYCMVCPIM-UHFFFAOYSA-L 0.000 claims description 8
- 239000000835 fiber Substances 0.000 claims description 6
- 229920000098 polyolefin Polymers 0.000 claims description 6
- 239000003365 glass fiber Substances 0.000 claims description 5
- 239000011152 fibreglass Substances 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract description 12
- 238000004891 communication Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 4
- 239000013307 optical fiber Substances 0.000 description 13
- 230000000694 effects Effects 0.000 description 10
- 238000010030 laminating Methods 0.000 description 8
- 230000002787 reinforcement Effects 0.000 description 6
- 230000017105 transposition Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
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- 239000010959 steel Substances 0.000 description 4
- 241000700159 Rattus Species 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000005253 cladding Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The invention relates to the technical field of communication optical cables, in particular to a layer-stranded outdoor optical cable, which comprises a cable core, a cable core protection layer and a sheath layer which are sequentially arranged from inside to outside; the cable core is formed by twisting a plurality of groups of optical cable units around a central reinforcing member; each group of optical cable units comprises a first clamping assembly and a second clamping assembly, each second clamping assembly is arranged between the two first clamping assemblies, each first clamping assembly comprises a shell and an optical cable sleeve arranged in the shell, one end of each second clamping assembly is attached to the central reinforcing member, and the other end of each second clamping assembly extends outwards along the outer side of the shell; set up cable core and cable core protective layer of nested design to set up annular protruding in cable core protective layer inboard, when the optical cable takes place to pull or extrude, make the annular protruding outside the optical cable bending position have the trend that is close to each other, the annular protruding of bending region inboard is kept away from each other, breaks down the perpendicular power that will act on the atress position, reduces the atress intensity of inside cable core, the outdoor life of extension optical cable.
Description
Technical Field
The invention relates to the technical field of communication optical cables, in particular to a layer-stranded outdoor optical cable.
Background
The optical cable is often used outdoors and is often eroded by natural factors, so that higher strength is required to ensure that the optical cable can work normally for a long time, and the outdoor optical cable mainly has three structures of a central tube type optical cable, a layer-twisted optical cable and a skeleton type optical cable.
The layer-twisted optical cable is obtained by adding the colored optical fibers and the fiber paste into the sleeve simultaneously, wherein the optical fibers can move in the sleeve, different sleeves are twisted along the reinforcing piece to form a cable core, and the sheath is arranged outside the cable core. The layer stranded optical cable is mainly characterized in that: the reinforcement is located in the center of the cable core, and the jacket may be layered around the reinforcement to provide good tensile properties and temperature characteristics for the cable.
When the existing outdoor optical cable is used, the optical cable is easily pulled by foreign objects or is swayed in windy weather, so that the optical cable is pulled, and when the pulling force is too large, the optical cable can be damaged and the inner core cannot be protected, and the normal use of the optical cable is affected.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the layer-stranded outdoor optical cable is provided, and the risk resistance of the optical cable is improved. The outdoor service life of the optical cable is prolonged.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
A layer-stranded outdoor optical cable comprises a cable core, a cable core protection layer and a sheath layer which are sequentially arranged from inside to outside; the cable core is formed by twisting a plurality of groups of optical cable units around a central reinforcing member;
Each group of optical cable units comprises a first clamping assembly and a second clamping assembly, each second clamping assembly is arranged between the two first clamping assemblies, each first clamping assembly comprises a shell and an optical cable sleeve arranged in the shell, one end of the shell, which is far away from the central reinforcing member, is provided with an opening part, the optical cable sleeve is embedded into the shell from the opening part, one end of the second clamping assembly is attached to the central reinforcing member, and the other end of the second clamping assembly extends outwards to the opening part along the outer side of the shell; the width of the second clamping assembly towards the attaching end of the central reinforcing member is smaller than the width of the second clamping assembly extending to the extending end of the opening part;
the cable core protective layer is the outer tube of cover on the cable core outer lane, and the inner wall of outer tube is provided with a plurality of annular archs along its length direction interval in proper order, forms annular groove between two adjacent annular archs, and annular arch and the laminating of the outer wall of cable core set up, and annular groove and the outer wall of cable core form the cavity structure, and casing, cavity structure intussuseption are filled with and are provided with cable cream.
When the optical cable is pulled and bent, the annular bulge realizes deflection on the joint surface of the annular bulge and the cable core, the stress of the optical cable is decomposed, the pressure resistance of the cable core is improved, the second clamping component is provided with an outwards moving acting force on the basis, the bending of the optical cable sleeve is buffered, when the acting force disappears, the annular bulge deflects and returns to the original position, the second clamping component is applied with an inwards acting force, and the stability of the optical cable is improved.
Further, the ratio of the height of the annular protrusion to the wall thickness of the outer tube is 2-3:2-3. The joint surface of the annular bulge and the cable core is an arc-shaped side wall. The friction force between the cable core protection layer and the cable core is reduced, and the pressure resistance of the cable core is improved. When the optical cable receives the pressure extrusion, the outer sheath of atress department is deformation downwards for the outer lane inwards extrudees deformation, and annular bulge realizes the skew on its faying surface with the cable core along its arc lateral wall, and the decurrent extruded power decomposes, makes the outside pressure that receives can not directly act on the corresponding position of cable core, and buffer pressure is to the extrusion of cable core, simultaneously, the cable core protective layer that corresponds near atress department because cavity structure's setting, and adjacent two annular bulge produce the motion trend of laminating each other, supports the cable core, has improved the withstand voltage performance of optical cable greatly.
Further, the casing includes the transposition face, internal rotation face and outer face of spiraling, and one side of transposition face is towards central reinforcement member and with central reinforcement member laminating, and internal rotation face and outer face of spiraling extend to the direction of keeping away from central reinforcement member from the both ends of transposition face, and the free end of internal rotation face and outer face of spiraling sets up in opposite directions, forms the opening on the casing.
In the application, the free ends of the inner rotating surface and the outer rotating surface are mutually close, the formed opening end can accommodate an optical cable sleeve to be clamped, the optical cable sleeve is prevented from being removed outwards from the opening end, the twisting effect of the shell is improved, and particularly, the optical cable sleeve is clamped in the shell during twisting, so that the threading difficulty of a cable core is reduced.
Further, the inside spacing arch that is provided with of casing along its length direction, spacing arch set up in the one side that the central reinforcement member was kept away from to the transposition face, and spacing arch is with the inside first cavity of dividing into of casing and second cavity, and cable jacket sets up respectively in first cavity and second cavity. Through setting up spacing arch for an optical cable sleeve pipe is established to inside card respectively of first cavity and second cavity, avoids optical cable sleeve pipe to take place to shift.
Further, the shell is axisymmetrically arranged, and the axis of the limiting protrusion passes through the center points of the outer tube and the center reinforcing member;
the second clamping assembly is axially symmetrically arranged, and the axis of the second clamping assembly penetrates through the outer tube and the center point of the center reinforcing member.
At this time, the thickness of the end near the inner rotating surface is equal to the thickness of the end near the outer rotating surface at both ends of the twisted surface.
Or the thickness of one end close to the inner rotating surface is smaller than that of one end close to the outer rotating surface on two ends of the twisting surface. According to the application, the first clamping component and the second clamping component are stranded around the central reinforcing member in an S-stranded mode, and one end of the inner rotating surface is smaller in thickness, so that the first clamping component is convenient to bend and fix, and the stranding effect of the cable core is improved. The specific internal rotation face keeps at the inner circle, and with the laminating of the second clamping assembly of another group of optical cable unit, the external rotation face keeps at the outer lane, with the laminating of the second clamping assembly of same group optical cable unit, improves the transposition homogeneity of cable core. Such that the outer profile of the cable is circular or oval in either cross-section.
Further, the laminating end both sides of second clamping component are provided with first pressure portion of supporting and second pressure portion of supporting, and first pressure portion of supporting sets up between the outer face of rotating of first clamping component and central reinforcing member, and the second pressure portion of supporting sets up between the inner rotation face of another group of first clamping component and central reinforcing member.
Further, the optical fiber and the fiber paste are arranged in the optical cable sleeve, and the fiber paste is arranged between the optical fiber and between the optical fiber and the optical cable sleeve.
Further, the central reinforcing member is an FRP fiberglass rod. The invention adopts the FRP glass fiber reinforced core with light weight to replace the traditional steel wire as the reinforcing piece of the optical cable, and greatly reduces the volume and the weight of the optical cable on the premise of not influencing the use function.
Further, the sheath layer comprises an inner sheath layer, an armor layer and an outer sheath layer which are sequentially arranged on the outer side of the cable core protective layer, the inner sheath layer is made of polyolefin or low-smoke halogen-free flame retardant materials, the armor layer is formed by twisting a plurality of light high-strength FRP glass fiber rods, and the outer sheath layer is made of polyolefin or low-smoke halogen-free flame retardant materials.
Specifically, the FRP rods are twisted and armored in an SZ twisting mode, and cladding protection is formed outside the inner sheath layer; then binding and fixing the steel wire rope by adopting binding yarns; the outer jacket layer is extruded by an extruder outside the optical cable which has armored the FRP rod. According to the invention, the FRP rod is simultaneously used by the central reinforcing member and the armor layer, so that the tensile capacity of the optical cable is effectively improved, meanwhile, the physical rat-proofing effect of the FRP rod is utilized to effectively prevent rats, the cost is reduced compared with the traditional metal armored physical rat-proofing optical cable, the production efficiency is improved, the application requirements of the existing environment can be met, the service life of the optical cable is prolonged, and the communication faults of the optical cable caused by rats are reduced.
The beneficial effects of the invention are as follows:
(1) According to the application, the cable core and the cable core protection layer which are in nested design are arranged, the annular bulge is arranged on the inner side of the cable core protection layer, when the optical cable is pulled or extruded, the annular bulge on the outer side of the bending position of the optical cable has a trend of approaching each other, the annular bulge on the inner side of the bending region is far away from each other, the vertical force acting on the stress position is decomposed, and the stress intensity of the cable core inside is reduced. Compared with the prior art, the application utilizes the annular bulge to buffer the pulling movement of the cable core, improves the bending resistance effect of the cable core, improves the stability of the optical cable and prolongs the outdoor service life of the optical cable.
(2) According to the invention, the opening part is arranged at the end part of the shell, so that the optical cable sleeve can be clamped in the shell from the opening part, the installation difficulty of the optical cable sleeve is reduced, meanwhile, the stranded surfaces are distinguished, the opening part always faces the outer side of the cable core in the stranding process, the cable core shaking caused by the deviation of the shell is avoided, meanwhile, the cable paste is filled in the shell and the cavity structure, the phenomenon that moisture enters the interior of the optical cable sheath is effectively stopped by utilizing the waterproof effect of the cable paste, and the reliability and the stability of the optical cable in the outdoor use process are further ensured. On the basis, when the optical cable works, certain heat is generated by the optical fibers in the optical cable, the air flow between the cable core and the cable core protection layer can be promoted by the design of the opening part, the local overheating is avoided, and the normal operation of the optical cable is fully maintained.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
FIG. 1 is a schematic view of a layer-twisted type outdoor optical cable according to embodiment 1 of the present invention;
FIG. 2 is a schematic cross-sectional view of a layer-twisted type outdoor optical cable according to embodiment 1 of the present invention;
FIG. 3 is a schematic structural diagram of a first clamping assembly according to embodiment 1 of the present invention;
FIG. 4 is a schematic structural diagram of a second clamping assembly according to embodiment 1 of the present invention;
FIG. 5 is a schematic cross-sectional view of the cable core protection layer in example 1 of the present invention;
FIG. 6 is a schematic view of a layer-twisted type outdoor optical cable according to embodiment 2 of the present invention;
Fig. 7 is a schematic structural diagram of a first sandwiching assembly in embodiment 2 of the present invention.
Reference numerals: 10. a cable core; 11. an optical cable unit; 12. a central reinforcing member; 13. a first clamping assembly; 14. a second clamping assembly; 141. a bonding end; 142. an extension end; 143. a first pressing part; 144. a second pressing part; 15. a housing; 151. an opening portion; 152. a twisting surface; 153. an internal rotation surface; 154. an external rotation surface; 155. a limit protrusion; 156. a first chamber; 157. a second chamber; 16. an optical cable sleeve; 161. an optical fiber; 162. a fiber paste; 20. a cable core protection layer; 21. an annular protrusion; 22. an annular groove; 23. a cavity structure; 30. a sheath layer; 31. an inner sheath layer; 32. an armor layer; 33. and an outer sheath layer.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Example 1
The layer-stranded outdoor optical cable shown in fig. 1-5 comprises a cable core 10, a cable core protection layer 20 and a sheath layer 30 which are sequentially arranged from inside to outside; the cable core 10 is formed by twisting 4 groups of optical cable units 11 around a central reinforcing member 12;
Each group of optical cable units 11 comprises a first clamping assembly 13 and a second clamping assembly 14, each second clamping assembly 14 is arranged between the two first clamping assemblies 13, each first clamping assembly 13 comprises a shell 15 and an optical cable sleeve 16 arranged in the shell 15, one end of the shell 15, which is far away from the central reinforcing member 12, is provided with an opening 151, the optical cable sleeve 16 is embedded into the shell 15 from the opening 151, one end of the second clamping assembly 14 is attached to the central reinforcing member 12, and the other end of the second clamping assembly extends outwards to the opening 151 along the outer side of the shell 15; the width of the attaching end 141 of the second sandwiching assembly 14 toward the center reinforcing member 12 is smaller than the width of the extending end 142 of the second sandwiching assembly 14 extending to the opening 151;
The cable core protection layer 20 is an outer tube sleeved on the outer ring of the cable core 10, a plurality of annular protrusions 21 are sequentially arranged on the inner wall of the outer tube at intervals along the length direction of the outer tube, an annular groove 22 is formed between every two adjacent annular protrusions 21, the annular protrusions 21 are attached to the outer wall of the cable core 10, a cavity structure 23 is formed between the annular groove 22 and the outer wall of the cable core 10, and cable paste is filled in the shell 15 and the cavity structure 23.
The application sets the nested cable core 10 and cable core protective layer 20, and sets the annular bulge 21 on the inner side of the cable core protective layer 20, when the optical cable pulls or extrudes, the annular bulge 21 on the outer side of the bending position of the optical cable has a trend of approaching each other, the annular bulge 21 on the inner side of the bending region is far away from each other, the vertical force acting on the stress position is decomposed, the stress intensity of the inner cable core 10 is reduced, on the basis, the application sets the first clamping component 13 and the second clamping component 14 to be stranded around the central reinforcing component 12 at intervals, at this time, the central reinforcing component 12 at the bending position bends and moves towards the outer side of the bending position, the second clamping component 14 moves outwards in the corresponding section, the bending of the optical cable sleeve 16 is buffered by the second clamping component 14, the required flexibility of the optical cable can be maintained, at the same time, the outer part of the second clamping component 14 is abutted on the annular bulge 21 approaching each other, and the rebound force of the annular bulge 21 promotes the second clamping component 14 to move to return to the original state when the pulling force is released, so that the structure is restored to the original state. Compared with the prior art, the application utilizes the annular bulge 21 to buffer the pulling movement of the cable core 10, improves the bending resistance effect of the cable core 10, improves the stability of the optical cable and prolongs the outdoor service life of the optical cable.
According to the invention, the opening 151 is arranged at the end part of the shell 15, so that the optical cable sleeve 16 can be clamped in the shell 15 from the opening 151, the installation difficulty of the optical cable sleeve 16 is reduced, meanwhile, the twisting surface 152 is distinguished, the opening 151 always faces the outer side of the cable core 10 in the twisting process, the cable core 10 shaking caused by the deflection of the shell 15 is avoided, meanwhile, the cable paste is filled in the shell 15 and the cavity structure 23, the phenomenon that moisture enters the interior of the optical cable sheath is effectively prevented by utilizing the waterproof effect of the cable paste, and the reliability and the stability of the optical cable in the outdoor use process are further ensured. On the basis, when the optical cable works, the optical fiber 161 in the optical cable generates certain heat, the design of the opening 151 can promote the air flow between the cable core 10 and the cable core protection layer 20, so that the local overheating is avoided, and the normal operation of the optical cable is fully maintained.
Preferably, in this embodiment, the ratio between the height of the annular projection 21 and the wall thickness of the outer tube is 1:1. Ensuring resilience of the annular protrusion 21.
As shown in fig. 5, the joint surface of the annular protrusion 21 and the cable core 10 is an arc-shaped side wall. The friction between the cable core protection layer 20 and the cable core 10 is reduced, and the pressure resistance of the cable core 10 is improved. When the optical cable receives the pressure extrusion, the outer sheath of atress department is deformation downwards for the outer lane inwards extrudees deformation, and annular protruding 21 realizes the skew on its laminating face with cable core 10 along its arc lateral wall, and the decrepitation power is decomposed, makes the outside pressure that receives can not directly act on the corresponding position of cable core 10, and buffer pressure is to the extrusion of cable core 10, and simultaneously, the cable core protective layer 20 that corresponds near atress department is owing to cavity structure 23's setting, and adjacent two annular protruding 21 produce the motion trend of laminating each other, support cable core 10, has improved the withstand voltage performance of optical cable greatly.
As shown in fig. 3, the case 15 includes a twisted surface 152, an inner twisted surface 153, and an outer twisted surface 154, one side of the twisted surface 152 faces the center reinforcing member 12 and is bonded to the center reinforcing member 12, the inner twisted surface 153 and the outer twisted surface 154 extend from both ends of the twisted surface 152 in a direction away from the center reinforcing member 12, the free ends of the inner twisted surface 153 and the outer twisted surface 154 are disposed in opposition, and an opening 151 is formed in the case 15. In the application, the free ends of the inner rotating surface 153 and the outer rotating surface 154 are mutually close, the formed open end can accommodate one optical cable sleeve 16 for clamping, the optical cable sleeve 16 is prevented from being removed outwards from the open end, the twisting effect of the shell 15 is improved, and particularly, the optical cable sleeve 16 is clamped inside the shell 15 during twisting, so that the penetrating difficulty of the cable core 10 is reduced.
With continued reference to fig. 3, a limiting protrusion 155 is disposed in the housing 15 along a length direction thereof, the limiting protrusion 155 is disposed on a side of the stranded surface 152 away from the central reinforcing member 12, the limiting protrusion 155 divides the housing 15 into a first chamber 156 and a second chamber 157, and the cable jacket 16 is disposed in the first chamber 156 and the second chamber 157, respectively. By providing the limiting protrusion 155, the first chamber 156 and the second chamber 157 are respectively clamped with one cable sleeve 16, so that the cable sleeve 16 is prevented from being displaced.
With continued reference to fig. 1, the housing 15 is axisymmetrically disposed, and the axis of the limiting protrusion 155 passes through the center points of the core protection layer 20 and the central reinforcing member 12; the second clamping assembly 14 is arranged axisymmetrically, and the axis of the second clamping assembly 14 passes through the core protection layer 20 and the center point of the center reinforcing member 12. The thickness of the end of the twisted surface 152 near the inner rotating surface 153 is equal to the thickness of the end near the outer rotating surface 154.
As shown in fig. 4, the two sides of the attaching end 141 of the second clamping assembly are provided with a first pressing portion 143 and a second pressing portion 144, the first pressing portion 143 is disposed between the outer rotating surface 154 of the first clamping assembly and the central reinforcing member 12, and the second pressing portion 144 is disposed between the inner rotating surface 153 of the other group of the first clamping assembly and the central reinforcing member 12.
Specifically, the optical fibers 161 and the paste 162 are disposed within the optical cable jacket 16, and the paste 162 is disposed between the optical fibers 161 and the optical fibers 161, and between the optical fibers 161 and the optical cable jacket 16.
To reduce the weight of the outdoor cable, the central strength member 12 is an FRP fiberglass rod. The invention adopts the FRP glass fiber reinforced core with light weight to replace the traditional steel wire as the reinforcing piece of the optical cable, and greatly reduces the volume and the weight of the optical cable on the premise of not influencing the use function.
As shown in fig. 1 and 6, the sheath layer 30 includes an inner sheath layer 31, an armor layer 32 and an outer sheath layer 33 sequentially disposed outside the cable core protection layer 20, the inner sheath layer 31 is made of polyolefin or low smoke halogen-free flame retardant material, the armor layer 32 is formed by twisting a plurality of light high strength FRP glass fiber rods, and the outer sheath layer 33 is made of polyolefin or low smoke halogen-free flame retardant material.
Specifically, the FRP bars are twisted and armored in an SZ twisting mode, and cladding protection is formed outside the inner sheath layer 31; then binding and fixing the steel wire rope by adopting binding yarns; the outer jacket layer 33 is extruded by an extruder outside the optical cable to which the FRP rod has been armored. The FRP rods are simultaneously used by the central reinforcing member 12 and the armor layer 32, so that the tensile capacity of the optical cable is effectively improved, meanwhile, the physical rat-proofing effect of the FRP rods is utilized for effective rat-proofing, the cost is reduced compared with that of the traditional metal armored physical rat-proofing optical cable, the production efficiency is improved, the application requirements of the existing environment can be met, the service life of the optical cable is prolonged, and the communication faults of the optical cable caused by rat damage are reduced.
Example 2
As shown in fig. 6 to 7, in this embodiment, the cable core 10 is formed by twisting 3 groups of optical cable units 11 around a central reinforcing member 12; the other structures and actions are similar to those of embodiment 1, and will not be described here again.
As shown in fig. 7, the thickness of the twisted surface 152 is smaller near the inner rotational surface 153 than near the outer rotational surface 154. In this embodiment, the first clamping component 13 and the second clamping component 14 are stranded around the central reinforcing member 12 in an S-stranding manner, and the thickness of one end of the inner rotation surface 153 is smaller, so that the first clamping component 13 is bent and fixed, and the stranding effect of the cable core 10 is improved. The inner rotating surface 153 is specifically kept at the inner ring and is attached to the second clamping assembly 14 of the other group of optical cable units 11, the outer rotating surface 154 is kept at the outer ring and is attached to the second clamping assembly 14 of the same group of optical cable units 11, and the stranding uniformity of the cable cores 10 is improved. Such that the outer profile of the cable is circular or oval in either cross-section.
The invention also provides a preparation method of the layer-stranded outdoor optical cable. The preparation method comprises the following preparation steps:
s01: clamping the cable jacket 16 filled with the optical fibers 161 and the paste 162 in the housing 15 to form a first clamping assembly;
s02: sequentially disposing the second clamping assembly and the first clamping assembly on the outer periphery of the central reinforcing member 12;
S03: starting stranding equipment, and winding the first clamping assembly and the second clamping assembly on the central reinforcing member 12 in an S stranding mode;
S04: the twisted cable core 10 is penetrated into the cable core protection layer 20, and the fiber paste 162 is filled between the cable core 10 and the cable core protection layer 20;
s05: extruding a low-smoke halogen-free flame retardant material outside the cable core protection layer 20 to form an inner sheath layer 31;
s06: twisting FRP rods to armor the outer side of the inner sheath layer 31 by adopting an SZ twisting mode to form an armor layer 32, and fastening and fixing the armor layer by adopting binding yarns;
s07: the outer sheath layer 33 is formed by extruding a low smoke halogen-free flame retardant material outside the yarn bundling layer.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The layer-twisted outdoor optical cable is characterized by comprising a cable core, a cable core protection layer and a sheath layer which are sequentially arranged from inside to outside; the cable core is formed by twisting a plurality of groups of optical cable units around a central reinforcing member;
Each group of optical cable units comprises a first clamping assembly and a second clamping assembly, each second clamping assembly is arranged between two first clamping assemblies, each first clamping assembly comprises a shell and an optical cable sleeve arranged in the shell, one end of the shell, which is far away from the central reinforcing member, is provided with an opening part, the optical cable sleeve is embedded into the shell from the opening part, one end of each second clamping assembly is attached to the central reinforcing member, and the other end of each second clamping assembly extends outwards to the opening part along the outer side of the shell; the width of the second clamping assembly towards the attaching end of the central reinforcing member is smaller than the width of the second clamping assembly extending to the extending end of the opening part;
the cable core protection layer is an outer pipe sleeved on the outer ring of the cable core, a plurality of annular protrusions are sequentially arranged on the inner wall of the outer pipe at intervals along the length direction of the outer pipe, an annular groove is formed between every two adjacent annular protrusions, the annular protrusions are attached to the outer wall of the cable core, the annular groove and the outer wall of the cable core form a cavity structure, and cable paste is filled in the shell and the cavity structure;
The shell comprises a twisting surface, an inner rotating surface and an outer rotating surface, one side of the twisting surface faces the central reinforcing member and is attached to the central reinforcing member, the inner rotating surface and the outer rotating surface extend from two ends of the twisting surface to a direction away from the central reinforcing member, the free ends of the inner rotating surface and the outer rotating surface are arranged in opposite directions, and the opening part is formed in the shell; the formed open end can accommodate a cable sleeve clamp;
The cable sleeve is characterized in that a limiting protrusion is arranged inside the shell along the length direction of the shell, the limiting protrusion is arranged on one side, far away from the central reinforcing member, of the stranded surface, the inner part of the shell is divided into a first cavity and a second cavity by the limiting protrusion, and the cable sleeve is respectively arranged in the first cavity and the second cavity.
2. The layer-twisted type outdoor optical cable according to claim 1, wherein a ratio between a height of said annular protrusion and a wall thickness of said outer tube is 2-3:2-3; the joint surface of the annular bulge and the cable core is an arc-shaped side wall.
3. The lay-up outdoor optical cable of claim 1, wherein the housing is axisymmetrically arranged, and the axis of the spacing protrusion passes through the outer tube and the center point of the center strength member;
the second clamping assembly is axially symmetrically arranged, and the axis of the second clamping assembly penetrates through the outer tube and the center point of the center reinforcing member.
4. A lay-type outdoor optical cable according to claim 3, wherein the thickness of the end near the inner rotary surface is equal to the thickness of the end near the outer rotary surface at both ends of the twisted surface.
5. A lay-type outdoor optical cable according to claim 1, wherein the thickness of the end near the inner rotary surface is smaller than the thickness of the end near the outer rotary surface at both ends of the twisted surface.
6. The twisted-pair outdoor optical cable according to claim 3 or 5, wherein a first pressing portion and a second pressing portion are provided on both sides of the attaching end of the second sandwiching assembly, the first pressing portion being provided between the outer spin face of the first sandwiching assembly and the center reinforcing member, and the second pressing portion being provided between the inner spin face of the other group of the first sandwiching assembly and the center reinforcing member.
7. The stranded outdoor fiber optic cable of claim 1, wherein said central strength member is an FRP fiberglass rod.
8. The layer-twisted outdoor optical cable according to claim 1, wherein the sheath layer comprises an inner sheath layer, an armor layer and an outer sheath layer which are sequentially arranged on the outer side of the cable core protective layer, the inner sheath layer is made of polyolefin or low-smoke halogen-free flame retardant material, the armor layer is formed by twisting a plurality of light-weight high-strength FRP glass fiber rods, and the outer sheath layer is made of polyolefin or low-smoke halogen-free flame retardant material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410182001.6A CN117741883B (en) | 2024-02-19 | 2024-02-19 | Layer-twisted type outdoor optical cable |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410182001.6A CN117741883B (en) | 2024-02-19 | 2024-02-19 | Layer-twisted type outdoor optical cable |
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| CN117741883A CN117741883A (en) | 2024-03-22 |
| CN117741883B true CN117741883B (en) | 2024-05-03 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208283615U (en) * | 2018-06-02 | 2018-12-25 | 宁波科曼光缆有限公司 | A kind of non-armored optical cable of layer-twisted type |
| CN213988347U (en) * | 2021-01-28 | 2021-08-17 | 国网湖北省电力有限公司随州供电公司 | Power cable and optical cable convenient to construction |
| CN113655579A (en) * | 2021-08-30 | 2021-11-16 | 江苏长飞中利光纤光缆有限公司 | Layer stranded optical cable with heart-shaped unit |
| CN217034353U (en) * | 2022-02-16 | 2022-07-22 | 山东鲁信通光电科技有限公司 | Novel layer stranded OPGW optical cable with embedded insulated conductor layer |
| CN114783661A (en) * | 2022-04-08 | 2022-07-22 | 张天宝 | Cable with opening part and optical fiber ribbon optical cable |
| CN115576065A (en) * | 2022-10-09 | 2023-01-06 | 黄小林 | Bending-resistant and impact-resistant optical cable for ships |
| WO2023000681A1 (en) * | 2021-07-23 | 2023-01-26 | 中天科技海缆股份有限公司 | Deepwater submarine cable |
-
2024
- 2024-02-19 CN CN202410182001.6A patent/CN117741883B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208283615U (en) * | 2018-06-02 | 2018-12-25 | 宁波科曼光缆有限公司 | A kind of non-armored optical cable of layer-twisted type |
| CN213988347U (en) * | 2021-01-28 | 2021-08-17 | 国网湖北省电力有限公司随州供电公司 | Power cable and optical cable convenient to construction |
| WO2023000681A1 (en) * | 2021-07-23 | 2023-01-26 | 中天科技海缆股份有限公司 | Deepwater submarine cable |
| CN113655579A (en) * | 2021-08-30 | 2021-11-16 | 江苏长飞中利光纤光缆有限公司 | Layer stranded optical cable with heart-shaped unit |
| CN217034353U (en) * | 2022-02-16 | 2022-07-22 | 山东鲁信通光电科技有限公司 | Novel layer stranded OPGW optical cable with embedded insulated conductor layer |
| CN114783661A (en) * | 2022-04-08 | 2022-07-22 | 张天宝 | Cable with opening part and optical fiber ribbon optical cable |
| CN115576065A (en) * | 2022-10-09 | 2023-01-06 | 黄小林 | Bending-resistant and impact-resistant optical cable for ships |
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|---|---|
| CN117741883A (en) | 2024-03-22 |
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