CN107797206B - Production equipment and production method of high-density optical fiber bundle micro-unit optical cable - Google Patents
Production equipment and production method of high-density optical fiber bundle micro-unit optical cable Download PDFInfo
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- CN107797206B CN107797206B CN201711240013.6A CN201711240013A CN107797206B CN 107797206 B CN107797206 B CN 107797206B CN 201711240013 A CN201711240013 A CN 201711240013A CN 107797206 B CN107797206 B CN 107797206B
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 97
- 230000003287 optical effect Effects 0.000 title claims abstract description 78
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 43
- 238000001125 extrusion Methods 0.000 claims abstract description 30
- 238000007664 blowing Methods 0.000 claims abstract description 28
- 230000000903 blocking effect Effects 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 230000003014 reinforcing effect Effects 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 13
- 230000002787 reinforcement Effects 0.000 abstract description 13
- 230000005540 biological transmission Effects 0.000 description 9
- 238000007493 shaping process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000002860 competitive effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
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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
- G02B6/4479—Manufacturing methods of optical cables
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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
- G02B6/4479—Manufacturing methods of optical cables
- G02B6/4486—Protective covering
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Abstract
The invention discloses production equipment of a high-density optical fiber bundle micro-unit optical cable, which comprises reinforcement paying-off equipment, optical fiber bundle micro-unit paying-off equipment, water-blocking unit paying-off equipment, stranding equipment and sheath extrusion equipment which are sequentially arranged, wherein an air blowing device is arranged at an inlet of the sheath extrusion equipment, an optical fiber bundle micro-unit is released from the optical fiber bundle micro-unit paying-off equipment and enters the stranding equipment together with water-blocking yarns released by the water-blocking unit paying-off equipment for stranding, and the stranded optical fiber bundle micro-unit and a reinforcement released by the reinforcement paying-off equipment enter the sheath extrusion equipment together through the air blowing device for sheath extrusion. According to the production equipment of the high-density optical fiber bundle micro-unit optical cable, the optical fiber bundle micro-unit has a certain structural extra length before entering the sheath extrusion equipment, so that the tensile property of the optical cable is improved; and a blowing device is added in front of the sheath extrusion equipment, and the roundness of the optical cable is ensured under the action of air flow.
Description
Technical Field
The invention relates to the technical field of optical fiber cable manufacturing, in particular to production equipment and a production method of a high-density optical fiber bundle micro-unit optical cable.
Background
As optical communication networks evolve toward high capacity and high speed, the technology of fiber optic cables is also continuously promoted. How to further promote pipeline resource utilization rate, optimize the optical cable structure as far as possible on the premise of not influencing transmission efficiency and capacity, improve the optical fiber density of optical cable is the key problem that the optical fiber cable industry concerns at present. At present, the method for improving the optical fiber density in the industry mainly reduces the outer diameter of a sleeve unit and increases the number of sleeve units in an optical cable, thereby improving the optical fiber density in the cable. The high-density optical fiber bundle micro-unit optical cable is mainly used for accessing a network segment and is directly buried or overhead. The optical cable structure is embedded in the sheath in a symmetrical mode through two or more reinforcing pieces, a circular inner hole can be formed when the sheath is extruded by using a certain extrusion molding die, and the optical fiber bundle micro units are arranged in the circular inner hole. As the optical fiber bundle microcells are made of elastomer materials, the microcells are soft, the outer diameter is small (between 0.8 mm and 1.7 mm), the wall thickness is thin (between 0.05 mm and 0.15 mm), and the microcells are easily punctured due to high yarn puncturing tension to influence the transmission performance of optical fibers, yarn puncturing equipment cannot be used for puncturing the microcells, so that the manufacturing process method of the optical cable with the structure mostly adopts a mode that the microcells are not punctured, and are directly placed or placed in the optical cable sheath in a spiral twisting mode.
However, the above manufacturing process method has almost no structural extra length of the optical fiber in the optical cable, and often the optical fiber strain exceeds the standard in the tensile test. Generally, after the optical fiber strain exceeds the standard, the diameter of the reinforcing member or the number of auxiliary reinforcing members is increased, so that the cost of the optical cable is increased on one hand, and the difficulty of the production process of the optical cable is increased on the other hand. In addition, the reinforcing part is embedded into the sheath, the forming process of the optical cable sheath can be influenced, the roundness of the outer diameter of the optical cable is poor, the larger the diameter of the reinforcing part is found in the debugging process of the production process, the larger the roundness of the outer diameter of the optical cable is influenced, and the existing production process conditions are difficult to round the optical cable with the structure.
Disclosure of Invention
The invention mainly aims to provide production equipment and a production method of a high-density optical fiber bundle micro-unit optical cable, aiming at increasing a certain structural extra length for the high-density optical fiber bundle micro-unit optical cable and improving the roundness of the optical cable.
In order to achieve the above object, the present invention provides a production apparatus for a high-density optical fiber bundle micro-unit cable, comprising a strength member paying-off apparatus, an optical fiber bundle micro-unit paying-off apparatus, a water blocking unit paying-off apparatus, a stranding apparatus and a sheath extrusion apparatus, which are sequentially arranged, wherein,
and an air blowing device is arranged at an inlet of the sheath extrusion equipment, the optical fiber bundle micro unit is released from the optical fiber bundle micro unit paying-off equipment and enters the stranding equipment together with the water blocking yarn released by the water blocking unit paying-off equipment for stranding, and the stranded optical fiber bundle micro unit and the reinforcement released by the reinforcement paying-off equipment enter the sheath extrusion equipment together through the air blowing device for sheath extrusion.
Preferably, the reinforcing member paying-off device, the optical fiber bundle micro-unit paying-off device, the water blocking unit paying-off device, the stranding device and the sheath extruding device are all movable devices.
Preferably, the twisting pitch and the number of turns of the twist of the twisting apparatus are adjustable.
Preferably, the outlet of the blowing device is communicated with the outside air to ensure the pressure inside the handpiece is equalized.
Preferably, the air blowing device is provided with an air valve to control the size of the air flow.
The invention further provides a production method of the high-density optical fiber bundle micro-unit optical cable, which comprises the following steps:
after the optical fiber bundle micro unit is released from the optical fiber bundle micro unit paying-off equipment with constant tension, the optical fiber bundle micro unit and the water blocking yarns released by the water blocking unit paying-off equipment are uniformly distributed in a twisted plate hole of twisting equipment to carry out SZ twisting;
and the twisted water-blocking yarns, the optical fiber bundle micro units and the reinforcing members released by the reinforcing member paying-off equipment enter a sheath extrusion equipment together through a blowing device to extrude the sheath, so that the optical cable production is completed.
Preferably, when SZ twisting is carried out, the twisting pitch is controlled at 100-1000 mm; the number of twisting turns is 4-15.
Preferably, the strand speed is less than 40m/min when SZ stranding is performed.
Preferably, when SZ twisting is carried out, the length of the optical fiber bundle micro unit in one twisting direction is ensured to be larger than the distance from the twisting head to the optical cable sheath forming area.
Preferably, the stranding pitch and the stranding turns of the stranding device are set so that the stranding device is stranded in the reverse direction after the previous turning point of the optical fiber bundle micro unit enters the sheath extrusion device.
The production and manufacturing method of the high-density optical fiber bundle micro-unit optical cable provided by the invention has the following beneficial effects:
1. the micro-unit bundle has a certain structural extra length after the micro-units of the optical fiber bundle are twisted, so that the tensile property of the optical cable is improved, and the influence on the transmission property and the service life of the optical cable caused by overlarge optical fiber strain in the use process of the optical cable is avoided;
2. the optical cable saves raw materials under the same tension requirement, reduces the cost of the optical cable and improves the competitive advantage of the product;
3. the optical fiber bundle micro units are orderly and tightly arranged after being twisted, the cable core structure is stable, the micro units in the sheath cannot be mutually extruded, and the transmission performance of the optical fiber cannot be influenced;
4. add a gas blowing device before sheath extrusion equipment, blow in inside the mold core and the optical cable sheath shaping district with cold air with certain air velocity, cold air can help the optical cable sheath to take shape fast, can form even atmospheric pressure district in sheath shaping district through the effect of air current simultaneously, can reduce or eliminate the reinforcement that imbeds in the sheath to the fashioned influence of sheath, guarantees that the optical cable has very high roundness, can improve optical cable atress performance.
Drawings
FIG. 1 is a schematic structural view of a manufacturing apparatus for a high-density optical fiber bundle micro-unit cable according to the present invention;
fig. 2 is a schematic structural diagram of a high-density optical fiber bundle micro-unit optical cable.
FIG. 3 is a schematic view of the assembly and principle of the blowing device.
In the figure, 1, a reinforcing member paying-off device, 2, an optical fiber bundle micro-unit paying-off device, 3, a water blocking unit paying-off device, 4, a twisting device, 5, an air blowing device, 6, a sheath extrusion device, 7, an optical fiber bundle micro-unit, 8, water blocking yarns, 9, an auxiliary reinforcing member, 10, a parallel reinforcing member, 11, an outer sheath, 12, an air flow duct, 13, a mold core, 14, a mold sleeve and 15 and a sheath forming area.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1 to 3 (the direction indicated by the arrows in fig. 1 and 3 is an air flow direction), a production apparatus for a high-density optical fiber bundle micro-unit optical cable includes a strength member paying-off apparatus 1, an optical fiber bundle micro-unit paying-off apparatus 2, a water blocking unit paying-off apparatus 3, a stranding apparatus 4, and a sheath extruding apparatus 6, which are sequentially disposed, wherein,
an air blowing device 5 is installed at an inlet of the sheath extrusion device 6, the optical fiber bundle micro unit after being released from the optical fiber bundle micro unit paying-off device 2 and the water blocking yarn released by the water blocking unit paying-off device 3 enter the stranding device 4 for stranding, and the stranded optical fiber bundle micro unit and the reinforcement released by the reinforcement paying-off device 1 enter the sheath extrusion device 6 through the air blowing device 5 for sheath extrusion.
The high density means that the fiber density of the optical fibers arranged in the inner hole of the optical cable is more than or equal to 2.5f/mm2. Further, the reinforcement paying-off device 1, the optical fiber bundle micro-unit paying-off device 2, the water blocking unit paying-off device 3, the stranding device 4 and the sheath extruding device 6 are all movable devices. During production, the positions and the quantity of equipment are adjusted according to the specification of the high-density optical fiber bundle micro-unit optical cable, and the production and manufacturing method is flexible and changeable.
Further, the twisting pitch and the number of twisting turns (i.e., the twisting pi-number) of the twisting apparatus 4 are adjustable. By setting the twisting pitch and twisting pi number of the twisting device 4, the twisting device 4 is twisted reversely after the front turning point of the micro-unit bundle enters the sheath, and the process is repeated. And the stranded micro-unit bundle enters sheath extrusion equipment 6 after passing through a blowing device 5, so that the optical cable production is completed.
Further, the outlet of the air blowing device 5 is in communication with the outside air (i.e., the bundle of microcells passes through the center thereof, and the rear is not sealed) to ensure the pressure inside the handpiece is equalized.
The air blowing device 5 is assembled with the jacket extrusion apparatus 6 by screws. Further, the air blowing device 5 is provided with an air valve to control the magnitude of the air flow. The molding process of the sheath material is influenced through the action of the airflow, so that the roundness of the optical cable is ensured.
In addition, in this embodiment, the strength member paying-off device 1 may be 2 or 4 according to the number of strength members, and the strength may be adjusted between 5N and 100N, the optical fiber bundle micro-unit paying-off device 2 supports 12 ~ 24 micro-units for paying-off, and is an active paying-off mode and controllable in tension, and supports a disc set with a diameter of 400mm for paying-off, the water blocking unit paying-off device 3 may satisfy paying-off of the water blocking yarn 8, and may also satisfy paying-off of other linear water blocking units or linear auxiliary strength members, the water blocking unit paying-off device 3 is an active or passive type and controllable in tension, the twisting device 4 supports 12 ~ 24 micro-units for one-layer twisting or multi-layer twisting, the twisting device 4 is an SZ twisting device, the sheath extrusion device 6 is a 90-machine device, the parallel strength members 10 are embedded in the sheath by a mold design, a circular inner hole is formed after the sheath material is extruded, and the micro-unit bundle smoothly enters the circular inner hole after passing through the blowing device 5, thereby.
A detailed description of one embodiment is given below.
For example, 4 pieces of 1.0mm frp are paid out from a reinforcement paying-off device 1 and penetrate into parallel reinforcement holes in a mold core, the paying-off tension of the reinforcement is 10-15N, 12 pieces of 1.3mm optical fiber bundle micro units 7 are paid out from the optical fiber bundle micro unit paying-off device 2 with 1N stable tension and 8 pieces of Z3.0 water-blocking yarns 8 paid out from the water-blocking unit paying-off device 3 with 1N tension enter a stranding device 4 together, and the 12 pieces of optical fiber bundle micro units 7 and 6 pieces of Z3.0 water-blocking yarns 8 are uniformly distributed in a stranding plate of the stranding device 4. The twisting pitch of the twisting device 4 was set to 150mm and the twisting pi-number was set to 8. The optical fiber bundle micro unit 7 and the water blocking yarn 8 stably enter the sheath extrusion equipment 6 through the blowing device 5 after coming out of the twisting head, the sheath is extruded outside the micro unit bundle, meanwhile, the air pressure of the air guide tube 12 is controlled to be 0.8MPa, the outer diameter of the optical cable is guaranteed to be round, the production speed of the optical cable sheath is 20m/min, and the final finished outer diameter of the 144-core optical cable is 11.0 mm.
The production equipment of the high-density optical fiber bundle micro-unit optical cable provided by the invention has the following beneficial effects:
1. the optical fiber bundle micro-units enable the cable core to have certain structural extra length after being stranded, so that the optical cable can be ensured to have smaller optical fiber strain when being subjected to tension under the same optical cable structure, the tensile property of the optical cable is improved, and the phenomenon that the transmission performance and the service life of the optical cable are influenced due to overlarge optical fiber strain in the use process of the optical cable is avoided;
2. the optical cable is increased with a certain structural extra length in the production process, and smaller reinforcing parts can be used under the same tension requirement, so that the outer diameter of the optical cable is reduced, the cost of the optical cable is reduced, and the competitive advantage of the product is improved;
3. the optical fiber bundle micro units are orderly and tightly arranged after being twisted, the cable core structure is stable, the micro units in the sheath cannot be mutually extruded, and the transmission performance of the optical fiber cannot be influenced;
4. add a gas blowing device 5 before sheath extrusion equipment 6, blow in inside the mold core and the optical cable sheath shaping district with cold air with certain air velocity, cold air can help optical cable sheath rapid prototyping, can form even atmospheric pressure district in sheath shaping district through the effect of air current simultaneously, can reduce or eliminate the reinforcement of embedding in the sheath to the fashioned influence of sheath, guarantees that the optical cable has very high rounding degree.
The invention further provides a production method of the high-density optical fiber bundle micro-unit optical cable.
In the preferred embodiment, a method for producing a high-density optical fiber bundle micro-unit optical cable comprises the following steps:
step S10, after the optical fiber bundle micro unit is released from the optical fiber bundle micro unit paying-off equipment with constant tension, the optical fiber bundle micro unit and the water blocking yarn released by the water blocking unit paying-off equipment are uniformly distributed in a twisted plate hole of twisting equipment to carry out SZ twisting;
and step S20, the twisted water-blocking yarns, the optical fiber bundle micro units and the reinforcing members released by the reinforcing member paying-off equipment enter a jacket extrusion equipment together through a blowing device to perform jacket extrusion, so that the optical cable production is completed.
In step S10, when SZ twisting is performed, the twisting pitch is controlled at 100-1000 mm; the number of the twisting turns is 4-15, so that the length of the optical fiber bundle micro unit in one twisting direction is ensured to be larger than the distance from the twisting head to the cable sheath forming area, and the phenomenon that the structure residual length is too small due to too long twisting length in one direction is avoided.
In addition, since the larger the strand speed, the larger the moment of inertia of the strand, and the larger the force received by the micro-unit in the reverse direction of the strand, the moment of inertia of the strand cannot be too large to ensure that the micro-unit does not affect the transmission performance of the optical fiber during the strand. In the embodiment, when SZ twisting is performed, the twisting speed is set to be less than 40 m/min.
In step S10, when SZ stranding is performed, it is ensured that the length of the bundle microcell is greater than the distance from the stranding head to the cable jacket molding area in one stranding direction.
And setting the twisting pitch and the number of twisting turns of twisting equipment, so that the twisting equipment reversely twists after the front turning point of the optical fiber bundle micro unit enters the sheath extruding equipment.
The production method of the high-density optical fiber bundle micro-unit optical cable provided by the embodiment has the following beneficial effects:
1. the optical fiber bundle micro-units enable the cable core to have certain structural extra length after being stranded, so that the optical cable can be ensured to have smaller optical fiber strain when being subjected to tension under the same optical cable structure, the tensile property of the optical cable is improved, and the phenomenon that the transmission performance and the service life of the optical cable are influenced due to overlarge optical fiber strain in the use process of the optical cable is avoided;
2. the optical cable is increased with a certain structural extra length in the production process, and smaller reinforcing parts can be used under the same tension requirement, so that the outer diameter of the optical cable is reduced, the cost of the optical cable is reduced, and the competitive advantage of the product is improved;
3. the optical fiber bundle micro units are orderly and tightly arranged after being twisted, the cable core structure is stable, the micro units in the sheath cannot be mutually extruded, and the transmission performance of the optical fiber cannot be influenced;
4. the cold air can help the optical cable sheath to be quickly formed, and meanwhile, an even air pressure area can be formed in the sheath forming area under the action of the air flow, so that the influence of a reinforcing part embedded in the sheath on the sheath forming can be reduced or eliminated, the optical cable is ensured to have high roundness, and the stress performance of the optical cable can be improved.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, are intended to be covered by the scope of the present invention.
Claims (6)
1. A production device of a high-density optical fiber bundle micro-unit optical cable is characterized by comprising a reinforcing member paying-off device, an optical fiber bundle micro-unit paying-off device, a water blocking unit paying-off device, a twisting device and a sheath extruding device which are sequentially arranged, wherein,
an air blowing device is installed at an inlet of the sheath extrusion equipment, the optical fiber bundle micro unit is fed out from the optical fiber bundle micro unit paying-off equipment and enters stranding equipment together with water blocking yarns fed out from the water blocking unit paying-off equipment for stranding, and the stranded optical fiber bundle micro unit and a reinforcing piece fed out from the reinforcing piece paying-off equipment enter the sheath extrusion equipment through the air blowing device for sheath extrusion; the reinforcing part paying-off equipment, the optical fiber bundle micro-unit paying-off equipment, the water blocking unit paying-off equipment, the stranding equipment and the sheath extrusion equipment are all movable equipment; the twisting pitch and the number of twisting turns of the twisting equipment can be adjusted; the outlet of the blowing device is communicated with the outside air to ensure the pressure inside the machine head to be balanced, the micro unit bundle passes through the center of the blowing device, and the rear part of the blowing device is not sealed; the air blowing device is provided with an air valve to control the size of air flow.
2. A method for producing a high-density optical fiber bundle micro-unit optical cable based on the production facility of claim 1, comprising the steps of:
after the optical fiber bundle micro unit is released from the optical fiber bundle micro unit paying-off equipment with constant tension, the optical fiber bundle micro unit and the water blocking yarns released by the water blocking unit paying-off equipment are uniformly distributed in a twisted plate hole of twisting equipment to carry out SZ twisting;
and the twisted water-blocking yarns, the optical fiber bundle micro units and the reinforcing members released by the reinforcing member paying-off equipment enter a sheath extrusion equipment together through a blowing device to extrude the sheath, so that the optical cable production is completed.
3. The method for producing a high-density optical fiber bundle micro-unit cable as claimed in claim 2, wherein when SZ stranding is performed, the stranding pitch is controlled at 100 and 1000 mm; the number of twisting turns is 4-15.
4. The method for manufacturing a high-density optical fiber bundle micro-unit optical cable according to claim 2, wherein the strand speed is less than 40m/min when the SZ stranding is performed.
5. The method for manufacturing a high-density optical fiber bundle micro-unit cable according to claim 2, wherein the SZ stranding is performed while ensuring that the length of the optical fiber bundle micro-unit in one stranding direction is greater than the distance from the stranding head to the cable jacket forming region.
6. The method for manufacturing a high-density optical fiber bundle micro-unit cable according to claim 2, wherein the twisting pitch and the number of twisting turns of the twisting device are set such that the twisting device is twisted in reverse after the previous turning point of the optical fiber bundle micro-unit enters the sheath extruding device.
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| CN109358399B (en) * | 2018-12-03 | 2020-11-03 | 江苏南方通信科技有限公司 | Layer-stranded miniature optical cable series production device and production process thereof |
| CN109709651B (en) * | 2018-12-26 | 2020-06-30 | 湖北凯乐科技股份有限公司 | Processing technology of bunched pipeline composite miniature optical cable |
| CN111025504B (en) * | 2019-12-28 | 2022-09-02 | 江苏中天科技股份有限公司 | Air-blowing micro cable and manufacturing method thereof |
| CN111258013B (en) * | 2020-02-25 | 2024-11-22 | 江苏亨通电力特种导线有限公司 | Optical fiber bundle casing device with excess length difference elimination function |
| CN111897073A (en) * | 2020-09-08 | 2020-11-06 | 深圳市特发信息股份有限公司 | A kind of fully dry SST optical cable and manufacturing equipment and manufacturing method |
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