CN117572579A - Self-stripping yarn-binding optical cable and preparation method thereof - Google Patents
Self-stripping yarn-binding optical cable and preparation method thereof Download PDFInfo
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- CN117572579A CN117572579A CN202311686466.7A CN202311686466A CN117572579A CN 117572579 A CN117572579 A CN 117572579A CN 202311686466 A CN202311686466 A CN 202311686466A CN 117572579 A CN117572579 A CN 117572579A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims description 6
- 238000004804 winding Methods 0.000 claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- 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
- G02B6/441—Optical cables built up from sub-bundles
- G02B6/4414—Optical cables built up from sub-bundles with internal serpentine waveguides
-
- 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
- G02B6/4479—Manufacturing methods of optical cables
- G02B6/449—Twisting
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Ropes Or Cables (AREA)
Abstract
The invention discloses a self-stripping yarn-binding optical cable, which comprises a cable core, a cable opening and an outer sheath, wherein the cable core comprises a twisting layer and yarn-binding groups which are sequentially arranged from inside to outside, the twisting layer is formed by twisting a plurality of optical units, each yarn-binding group at least comprises two strands of yarn-binding yarns, each yarn-binding strand is respectively wound on the twisting layer to bind the twisting layer, and the winding directions of all yarn-binding yarns are the same; the opening cable is one and is wound on the cable core so as to press the yarn bundling group on the stranding layer, and the winding direction of the opening cable is opposite to the winding direction of the yarn bundling group; the opening cable is in direct contact with the outer sheath to peel the outer sheath apart. The opening cable and the binding yarn are integrated, the winding directions of the opening cable and the binding yarn are opposite, the opening cable can play the role of binding yarn to ensure the twisting pitch of the binding yarn, and play the function of opening the cable to ensure the tearing sheath.
Description
Technical Field
The invention belongs to the field of optical communication, and particularly relates to a self-stripping yarn-bundling optical cable and a preparation method thereof.
Background
The layer-twisted structure increases the flexibility and bending performance of the optical cable, improves the tensile resistance of the optical cable and improves the temperature characteristic of the optical cable. In order to prevent twisting back twist, the twisting layers of the optical cable are twisted so as to ensure various performance requirements. Of course, glue adhesion is also used to replace yarn binding in the market, although the speed is improved, the spraying uniformity of the glue is difficult to be ensured, and the stability of the traditional yarn binding structure cannot be compared. The traditional yarn binding technology is to wind two strands of yarn on the stranding layer clockwise and anticlockwise.
Meanwhile, the outer layer of the cable core of the layer-twisted optical cable is provided with aramid fiber, glass fiber, steel-aluminum belts, outer jackets and other armor elements, the construction process of the existing optical cable is characterized in that the inner cable core and the outer jackets are separated, the jackets and the armor are required to be peeled firstly, the material for tearing the outer jackets is generally cable-opened, and then the cable core is peeled by cutting and bundling yarns. The construction process is difficult to smoothly peel, and time and labor are wasted. In production, the production cost is increased, and more cracking materials are added.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the invention provides a self-stripping yarn-bundling optical cable and a preparation method thereof, wherein the winding mode of an opening cable and yarn bundling is adjusted, the function of replacing part of yarn bundling by the opening cable is adopted, after the opening cable strips an outer sheath, the self-stripping yarn-bundling optical cable releases the binding of yarn bundling, and all yarn bundling can be stripped rapidly, so that the purpose of stripping the outer sheath and the cable core at one time is achieved.
In order to achieve the above object, according to one aspect of the present invention, there is provided a self-stripping and yarn-binding optical cable comprising a cable core, a stripping cable and an outer sheath, wherein the cable core comprises a twisted layer and a yarn-binding group which are sequentially arranged from inside to outside, the twisted layer is formed by twisting a plurality of optical units,
the yarn bundling group comprises N strands of yarn bundling, each strand of yarn bundling is respectively wound on the twisted layer to bundle the twisted layer, and the winding directions of all the yarn bundling are the same, wherein N is more than or equal to 2;
the open cable is one and is wound on the cable core so as to press the yarn-binding group on the stranding layer, and the winding direction of the open cable is opposite to the winding direction of the yarn-binding group.
Preferably, the helix angles of the individual strands wound around the lay layer are equal.
Preferably, the yarn has a density of 1670dtex, a dry heat shrinkage of less than 2.5% after 10 minutes at 177 ℃ and an elongation at break of more than 10%.
Preferably, the pitch of each strand of the binding yarn is D;
the distance between any two adjacent binding yarns is D/N and is between 20mm and 40 mm.
Preferably, the pitch of the open cable is also D.
Preferably, the density of the opening rope is 3000dtex, the breaking strength is more than 200N, and the breaking elongation is more than 10%.
Preferably, the outer sheath is made of PE.
According to another aspect of the present invention, there is also provided a method for manufacturing the self-stripping and yarn-bundling optical cable, which is characterized by comprising the steps of:
1) Twisting a twisting layer on a twisting table;
2) Simultaneously winding N strands of binding yarns on a twisting layer through one machine head of the double-head pot type binding machine, forming a cable core together by the twisting layer and a binding yarn group formed by the N strands of binding yarns, winding a cable on the cable core through the other machine head of the double-head pot type binding machine, and thus realizing synchronous winding of the binding yarn group and the cable, wherein each machine head comprises a flying pot and a rotating shaft positioned in the flying pot, one rotating shaft is used for installing a yarn group with the N strands of binding yarns, and the other rotating shaft is used for installing a rope drum around which the cable is wound;
3) The cable core around which the open cable is wound is extruded through an extruder to form an outer jacket.
Preferably, for the machine head with yarn groups on the rotating shaft, the inner wall of the flying pan is also provided with N magnetic rings and N tension detection devices, each strand of yarn of the yarn groups on the yarn group shaft is connected to the stranding layer after passing through one magnetic ring and one tension detection device, and each tension detection device detects the tension of one strand of yarn in real time.
Preferably, the dynamic tension detection device detects tension signals in real time and transmits the tension signals to the control unit, and the control unit controls the rotation speed difference of the flying pot and the yarn group shaft in real time through the driving mechanism to adjust yarn binding tension.
In general, the above technical solutions conceived by the present invention, compared with the prior art, enable the following beneficial effects to be obtained:
1) According to the self-stripping yarn-binding optical cable, the stability of the twisting pitch of the twisting layer can be guaranteed by binding yarns on the twisting layer, and the opening cable is used for tearing the outer sheath of the cable core.
2) According to the preparation method of the self-stripping yarn-bundling optical cable, yarn can be bundled on the twisted layer and the cable core formed by the twisted layer and the yarn bundling group on the double-end pot type yarn bundling machine, so that the yarn bundling and the cable bundling are synchronously carried out, and the production efficiency is improved.
Drawings
FIG. 1 is a schematic illustration of an open cable of the present invention wrapped around a cable core;
FIG. 2 is a schematic view of a double-ended pan-type yarn bundling machine for use in the manufacturing method of the present invention;
FIG. 3 is a schematic illustration of the machine head with two sets of tension sensing devices removed;
fig. 4 is a schematic view of the arrangement of two sets of tension-detecting means on a flying pan.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Referring to fig. 1, a self-stripping yarn-binding optical cable comprises a cable core, a cable 6 and an outer sheath, wherein the cable core comprises a twisting layer and yarn-binding groups which are sequentially arranged from inside to outside, and the twisting layer is formed by twisting a plurality of optical units. The optical unit includes a ferrule and a plurality of optical fibers disposed within the ferrule, the ferrules of the optical units being stranded together.
The yarn bundling group comprises N strands of yarn bundling 5, each strand of yarn bundling 5 is wound on the twisted layer respectively to bundle the twisted layer, the winding directions of all yarn bundling 5 are the same, and all yarn bundling 5 are conveniently wound on the twisted layer together, wherein N is more than or equal to 2, and preferably N=2.
The opening cable 6 is one, and the opening cable 6 is wound around the cable core so as to press the bundle yarn group against the twisted layer, the winding direction of the opening cable 6 being opposite to the winding direction of the bundle yarn 5. The cable 6 is wound around the cable core, so that not only is the twisting pitch of the twisting layer ensured, but also the binding yarns 5 are pressed on the twisting layer, and the twisting pitch of all the binding yarns 5 is ensured, so that the twisting structures of the twisting layer and the binding yarns are relatively stable. Compared with the binding yarn 5, the tensile strength and toughness of the opening rope 6 are far superior, so that the opening rope is directly tied on the sleeve, and the binding mark is serious compared with the binding yarn 5. In order to solve the problem, a strand of opening cable is matched with a plurality of strands of binding yarns 5 to share the pressure brought by the opening cable 6, so that the strands of binding yarns 5 are positioned below the opening cable 6, and the opening cable 6 is prevented from being directly wound on a sleeve, thereby reducing binding marks. The multi-strand binder yarns 5 are interlaced with the split ropes 6 to stabilize the cable core. Meanwhile, in order to realize the simultaneous stripping of the sheath and the cable core, the multi-strand binding yarns 5 cannot be staggered, otherwise, the multi-strand binding yarns 5 need to be further stripped, so that the winding directions of the multi-strand binding yarns 5 are the same, the helix angles are equal, and the multi-strand binding yarns 5 are kept in a parallel state.
The opening cable 6 may be in direct contact with the outer sheath to peel the outer sheath, by pulling the opening cable 6, the outer sheath may be torn, and then each strand of the bundle yarn 5 may be cut, all the bundle yarns 5 may be simultaneously recoil peeled. Alternatively, a layer of steel strip may be provided between the opening cable 6 and the outer sheath, the opening cable 6 being capable of tearing the steel strip and the outer sheath together.
Fig. 1 shows two strands of binding yarns 5 and one opening cable 6, and by properly selecting the material, elasticity and protection capability of the binding yarns 5, and the material, property, stripping capability and binding yarn pitch of the opening cable 6, the optical cable can be easily stripped, and the outer sheath structure can be made uniform.
Further, the helix angles of the yarns 5 wound on the twisted layers are equal, so that the effect of winding and applying tension to the twisted layers is ensured to be uniform.
Further, the density of the binding yarn 5 is 1670dtex, the dry heat shrinkage rate is less than 2.5% after 10min at 177 ℃, and the elongation at break is more than 10%, so that the cable core can be ensured not to be marked when passing through the sheath process.
Further, the pitch of each strand of the binding yarn 5 is D, the distance between any two adjacent strands of binding yarns 5 is D/N, and the distance is between 20mm and 40mm, so that the binding yarns 5 are uniformly distributed, the twisting force on a twisting layer is also uniform, the pressure of a cable for binding yarns can be improved when a cable core is stabilized, the binding trace is improved, too many binding yarn coils are not caused, entanglement is generated during cable opening, and the cable is not easy to strip. Preferably d=50 mm.
Further, the pitch of the opening rope 6 is also D, which coincides with the pitch of each strand of the bundle yarn 5.
Further, the density of the opening rope 6 is 3000dtex, the breaking strength is greater than 200N, and the breaking elongation is greater than 10%, so that the outer sheath can be ensured to be torn smoothly. The outer sheath is preferably made of PE.
Referring to fig. 2 to 4, according to another aspect of the present invention, there is also provided a method for manufacturing the self-stripping and bundling optical cable, comprising the steps of:
1) Twisting a twisting layer on a twisting table;
2) The novel double-end pot type yarn bundling machine comprises a machine head 1, a twisting layer, a cable core, a cable 6 winding opening mechanism, a rope drum, a flying pot 11 and a rotating shaft, wherein N strands of yarn bundling 5 are firstly wound on the twisting layer at the same time, the yarn bundling group formed by the twisting layer and the N strands of yarn bundling 5 forms a cable core, the cable 6 is wound on the cable core through the other machine head 1 of the double-end pot type yarn bundling machine, so that synchronous winding of the yarn bundling group and the cable 6 is realized, each machine head 1 comprises the flying pot 11 and the rotating shaft positioned in the flying pot 11, one rotating shaft is used for installing a yarn group 2 with the N strands of yarn bundling 5, and the other rotating shaft is used for installing a rope drum around which the cable 6 is wound. The direction of the flying pot 11 on the two heads 1 of the double-head pot yarn binding machine is opposite, so that yarn binding 5 and a cable opening 6 with opposite winding directions can be formed. The flying pot 11 and the yarn spool 12 are driven to rotate by a flying pot driving motor 13 and a yarn spool driving motor 14, respectively.
3) The cable core wound with the opening cable 6 passes through an extruder and is extruded to form an outer sheath, and the outer sheath is directly contacted with the opening cable 6, so that the opening cable 6 can be directly peeled off the outer sheath.
Further, for the machine head 1 with the yarn group 2 installed on the rotating shaft, the inner wall of the flying pot 11 is also provided with N magnetic rings 111 and N tension detection devices, each strand of the yarn 5 of the yarn group 2 on the yarn group 2 shaft 12 is connected to the stranding layer after passing through one magnetic ring 111 and one tension detection device, and each tension detection device detects the tension of one strand of the yarn 5 in real time. The double-end pot type yarn bundling machine is selected, because the speed is too high, the yarn number of the yarn bundling 5 is relatively large compared with the original yarn, after one yarn bundling 5 is broken into two sections, the two yarn bundling 5 discharged from the same yarn group 2 is easily carried to the target object 4 to be bundled to be pressed when the other yarn bundling 5 which is not broken rotates rapidly, so that the yarn breakage of one yarn bundling 5 of the yarn group 2 in production is not easy to find.
The traditional yarn bundling machine with the double-disc structure adopts a tension monitoring system in the aspect of yarn breakage, namely, after yarn bundling 5 breaks, the instantaneous rotating speed of yarn groups 2 is rapidly reduced, and an alarm system is triggered at the moment, so that the production line is smoothly stopped. However, in the double-end pot type yarn bundling machine, since each yarn group 2 can draw out a plurality of yarn bundles 5 at the same time, if one yarn bundle 5 is broken, the other yarn bundle 5 still can be smoothly fed in and fed out, at the moment, the rotation speed of the yarn group 2 cannot be ensured to be reduced, and an alarm system cannot be smoothly triggered to stop a production line, so that defective products are caused. The dynamic tension detecting device 3 can adopt the existing tension detecting structure for optical cable production, so long as the tension on the yarn 5 can be detected in real time and dynamically in the moving process of the yarn 5. Reference is also made to the applicant's prior applications of "CN 201610898866-a sleeve dynamic tension detecting device 3 and method" and "CN 202210755420-a cable sleeve dynamic tension reading device and adjusting device", the dynamic tension detecting device 3 having a bracket 32, a guide wheel 31 and a displacement sensor 33. The dynamic tension detection device 3 detects tension signals in real time and transmits the tension signals to the control unit, and the control unit controls the rotation speed difference of the flying pot 11 and the yarn cluster shaft 12 in real time through the driving mechanism to adjust yarn binding tension.
The dynamic tension detection device 3 is adopted, so that the dynamic tension of each strand of the yarn 5 at the machine head 1 in the production process can be automatically and effectively detected in real time, the accuracy and the instantaneity of monitoring the tension of the yarn 5 wound on the cable core in the production of the optical cable can be effectively improved, and the device can be directly arranged on cable-forming equipment for the production of the optical cable, and is convenient to use and operate.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The self-stripping yarn-binding optical cable comprises a cable core, a cable and an outer sheath, wherein the cable core comprises a twisting layer and a yarn-binding group which are sequentially arranged from inside to outside, the twisting layer is formed by twisting a plurality of optical units,
the yarn bundling group comprises N strands of yarn bundling, each strand of yarn bundling is respectively wound on the twisted layer to bundle the twisted layer, and the winding directions of all the yarn bundling are the same, wherein N is more than or equal to 2;
the open cable is one and is wound on the cable core so as to press the yarn-binding group on the stranding layer, and the winding direction of the open cable is opposite to the winding direction of the yarn-binding group.
2. A self-stripping, yarn-binding optical cable according to claim 1, wherein the helix angles of the individual yarns wound around the twisted layers are equal.
3. The self-stripping, yarn-binding optical cable according to claim 1, wherein the yarn has a density of 1670dtex, a dry heat shrinkage of less than 2.5% and an elongation at break of more than 10% after 10 minutes at 177 ℃.
4. A self-stripping, yarn-binding optical cable according to claim 1, wherein the pitch of each yarn-binding strand is D;
the distance between any two adjacent binding yarns is D/N and is between 20mm and 40 mm.
5. A self-stripping and bundling optical cable according to claim 4, wherein the pitch of the stripping cable is also D.
6. The self-stripping and bundling optical cable according to claim 1, wherein the density of the stripping cable is 3000dtex, the breaking strength is more than 200N, and the breaking elongation is more than 10%.
7. The self-stripping and bundling optical cable according to claim 1, wherein the outer jacket is made of PE.
8. A method of making a self-stripping and bundling optical cable according to any of claims 1-7, comprising the steps of:
1) Twisting a twisting layer on a twisting table;
2) Simultaneously winding N strands of binding yarns on a twisting layer through one machine head of the double-head pot type binding machine, forming a cable core together by the twisting layer and a binding yarn group formed by the N strands of binding yarns, winding a cable on the cable core through the other machine head of the double-head pot type binding machine, and thus realizing synchronous winding of the binding yarn group and the cable, wherein each machine head comprises a flying pot and a rotating shaft positioned in the flying pot, one rotating shaft is used for installing a yarn group with the N strands of binding yarns, and the other rotating shaft is used for installing a rope drum around which the cable is wound;
3) The cable core around which the open cable is wound is extruded through an extruder to form an outer jacket.
9. The method according to claim 8, wherein for the machine head with yarn groups mounted on the rotating shaft, the inner wall of the flying pan is further provided with N magnetic rings and N tension detecting devices, each strand of yarn of the yarn groups on the yarn group shaft is connected to the stranding layer after passing through one magnetic ring and one tension detecting device, and each tension detecting device detects the tension of one strand of yarn in real time.
10. The preparation method according to claim 8, wherein the dynamic tension detecting device detects tension signals in real time and transmits the tension signals to the control unit, and the control unit controls the rotation speed difference of the flying pot and the yarn cluster shaft in real time through the driving mechanism to adjust the yarn binding tension.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311686466.7A CN117572579A (en) | 2023-12-11 | 2023-12-11 | Self-stripping yarn-binding optical cable and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311686466.7A CN117572579A (en) | 2023-12-11 | 2023-12-11 | Self-stripping yarn-binding optical cable and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN117572579A true CN117572579A (en) | 2024-02-20 |
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ID=89893826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311686466.7A Pending CN117572579A (en) | 2023-12-11 | 2023-12-11 | Self-stripping yarn-binding optical cable and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117572579A (en) |
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2023
- 2023-12-11 CN CN202311686466.7A patent/CN117572579A/en active Pending
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