CN205368132U - Optical fiber perform's extension equipment - Google Patents
Optical fiber perform's extension equipment Download PDFInfo
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- CN205368132U CN205368132U CN201520972132.0U CN201520972132U CN205368132U CN 205368132 U CN205368132 U CN 205368132U CN 201520972132 U CN201520972132 U CN 201520972132U CN 205368132 U CN205368132 U CN 205368132U
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Abstract
The utility model relates to a be an optical fiber perform's extension equipment. Use this extension equipment to extend optical fiber perform, firstly prefabricated excellent high -usage, secondly, little to the space requirement of lathe, satisfy the requirement that prefabricated excellent big stick -means of intimidation directly extends. Including graphite heating member, graphite insulator, heating furnace body, the sealed shutter in a left side, the sealed shutter in the right side, extend workstation, cutting device, chuck no. 1, jack catch no. 1, graphite bearing roller, pressure bearing roller brace table, pressure bearing roller no. 1, pressure bearing roller no. 2 and pressure bearing roller no. 3, with the good prefabricated stick of the fixed butt joint of jack catch no. 1, the below is supported with the graphite bearing roller, will prefabricate the stick and remove, just in time reachs the high -temperature region of graphite heating member until prefabricated excellent right -hand member face, and pressure bearing roller no. 1 also gets into the high -temperature region with pressure bearing roller no. 2 and below graphite bearing roller centre gripping and the same caudal peduncle no. 3 in target stick footpath, reach dock the temperature after, begin the extension. After extending in -process target stick and stretching out the predetermined length of furnace body, use cutting device to continue the cutting, the target stick will cut under shifts extremely other positions.
Description
Technical field
The utility model relates to the extension device of a kind of preform.Using this equipment to extend, one is that prefabricated rods utilization rate is high；Two is that the space requirement to lathe is little, meets the requirement that prefabricated rods big stick-means of intimidation footpath extends.
Background technology
The manufacture of fiber manufacturing and preform carries out substantially according to procedure below: adopt axial vapor deposition method (VAD) deposited powder state plug, generates glassy state plug through deshydroxy vitrification；Then extending to the thinner plug of appropriate length, at the peripheral outsourcing deposited powder state rod further of every plug, deshydroxy vitrification generates large size prefabricated rod again.
In recent years, manufacturing the requirement of improved efficiency to meet preform, prefabricated rods mother metal diameter is increasing, but optical fiber company is different to the requirement in prefabricated stick footpath, and has the impurity such as bubble in prefabricated rods, it is necessary to prefabricated rods is extended.
In JP2014-19606 patent, on vertical extension device, extend raw material availability by exchanging to extend to improve by prefabricated rods head and the tail section, and reduce equipment cost by prefabricated rods after underside roller replacement chuck clamping caudal peduncle and extension.But this patent has two obvious deficiencies: close on the parallel portion in tapering be difficult to thoroughly effectively extend, raw material availability is relatively low；This extension method requires that device height ensure that prefabricated rods can extend according to target rod footpath, if target rod footpath is thinner, the rod after extension is long very long, and the requirement of device height is actually increased equipment cost.
Summary of the invention
This utility model is the extension device providing a kind of light prefabricated rods for above-mentioned weak point.Tapering and one section of caudal peduncle of parallel portion boundary adjunction in prefabricated rods, extend caudal peduncle extending finishing phase, but by fully extended for parallel portion prefabricated rods complete；It addition, adopt horizontal-extending mode, adopt cutting equipment that the prefabricated rods after extending is carried out cutting on line, reduce the requirement to lathe length.
The extension device of a kind of preform is to take techniques below scheme to realize:
The extension device of a kind of preform includes graphite heating body, graphite insulator, heating furnace body, left sealing shutter, right sealing shutter, stretching operating platform, cutter sweep, chuck one, claw one, plumbago support roller, pressure carrying roller support platform, pressure carrying roller one, pressure carrying roller two and pressure carrying roller three.
Heating furnace body is arranged on stretching operating platform rear portion, graphite heating body is installed in heating furnace body, graphite insulator is installed between heating furnace body and graphite heating body, the stretching operating platform at heating furnace body rear portion supports platform equipped with pressure carrying roller, pressure carrying roller supports on platform equipped with pressure carrying roller one, pressure carrying roller two and pressure carrying roller three, for supporting the caudal peduncle three of prefabricated rods, equipped with cutter sweep between pressure carrying roller one and pressure carrying roller two, in stretching operating platform leading section equipped with chuck one, equipped with claw one on chuck one.
Stretching operating platform between heating furnace body and chuck one is equipped with plumbago support roller, fixing to the prefabricated rods connected for support claw one.
Fixing to the prefabricated rods connected with claw one, lower section plumbago support roller supports, prefabricated rods is moved, until prefabricated rods right side just arrives the high-temperature region of graphite heating body, pressure carrying roller one clamps the caudal peduncle three identical with target rod footpath also into high-temperature region with pressure carrying roller two with lower section plumbago support roller, reach, after jointing temp, starting to extend.After target rod stretches out body of heater predetermined length in extension process, use cutter sweep 7 to continue cutting, and the target rod under cutting is transferred to other positions.
Described cutter sweep has cutting driving motor, and cutting driving motor, equipped with diamond blade, can move up and down, moving range is 0 ~ 200mm, this cutter sweep level of synchronization can move in extension process, fly-cutting in movement, and playback prepares to cut next time rapidly.
The extension method of a kind of preform is as follows:
1, prefabricated rods starts after docking with caudal peduncle three to extend；
2, extension process follows the equal-volume principle before and after extending, chuck send rod by constant speed in stove, constant speed ranges for 5 ~ 30mm/min, optimal value is 10 ~ 20mm/min, according to female stick footpath, target rod footpath and delivery speed, calculate the linear velocity of pressure carrying roller one and pressure carrying roller two according to equal-volume principle and set extension；
3, when the docking location of caudal peduncle three and prefabricated rods moves to the cutter sweep place between pressure carrying roller one and pressure carrying roller two, pressure carrying roller three declines and clamps caudal peduncle three, and cutter sweep cuts, and makes caudal peduncle three separate with prefabricated rods, pressure carrying roller three rises, and caudal peduncle three is transferred to other positions；
4, continue to extend, and use cutter sweep to continue cutting in predetermined length；
5 until extending to the joint arrival cutter sweep position of caudal peduncle two and parallel portion, and after having cut, extension terminates.
Described prefabricated rods is based on the dopant material of quartz material.
The excellent footpath of described prefabricated rods ranges for 140mm ~ 200mm.
The excellent footpath of described caudal peduncle three ranges for 40 ~ 180mm.
Described caudal peduncle is quartz material.
Described blowtorch is metal single spraying lamp, and burning gases are hydrogen (H2), and combustion-supporting gas is oxygen (O2), is divided into inside and outside oxygen.
Described left sealing shutter and right sealing shutter, internal diameter is adjustable, ranges for 0 ~ 220mm.
Described claw one, claw two and chuck three, the diameter that is installed is adjustable, ranges for 0 ~ 200mm.
Described pressure carrying roller lifting distance ranges for 0 ~ 150mm.
Described cutter sweep is diamond blade, and cut coverage is 0 ~ 200mm.
The extension method of a kind of preform of this utility model and equipment advantage thereof: one is that prefabricated rods utilization rate is high, will extend one section of caudal peduncle of end adjunction of prefabricated rods, and in extension process, loss part is caudal peduncle part, and raw material is almost without waste；Two is that so this extension method is little to the space requirement of lathe, concrete size is determined by Cutting Length owing to after extending, prefabricated rods is cut while being extension.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, this utility model is further illustrated.
Fig. 1 is the extension device schematic diagram of a kind of preform.
Fig. 2 is cutting and the caudal peduncle docking schematic diagram of a kind of preform.
Fig. 3 is the extension process schematic of a kind of preform.
In figure: 1, graphite heating body；2, graphite insulator；3, heating furnace body；4, left sealing shutter；5, right sealing shutter；6, stretching operating platform；7, cutter sweep；8, chuck one；9, claw one；10, caudal peduncle one；11, upper tapering；12, caudal peduncle two；13, prefabricated rods；14, plumbago support roller；15, pressure carrying roller supports platform；16, pressure carrying roller one；17, pressure carrying roller two；18, pressure carrying roller three；19, mating operation platform；20, docking blowtorch；21, chuck two；22, claw two；23, caudal peduncle three；24, upper caudal peduncle cutting docking location；25, lower caudal peduncle cutting position；26, prefabricated rods and caudal peduncle three docking location；27, caudal peduncle three cutting position；28, the effective cutting position of prefabricated rods；29, chuck three；30, claw three.
Detailed description of the invention
With reference to accompanying drawing 1～3, the extension device of a kind of preform includes graphite heating body 1, graphite insulator 2, heating furnace body 3, left sealing shutter 4, right sealing shutter 5, stretching operating platform 6, cutter sweep 7, chuck 1, claw 1, plumbago support roller 14, pressure carrying roller support platform 15, pressure carrying roller 1, pressure carrying roller 2 17, pressure carrying roller 3 18.
Heating furnace body 3 is arranged on stretching operating platform 6 rear portion, graphite heating body 1 is installed in heating furnace body 3, graphite insulator 2 is installed between heating furnace body 3 and graphite heating body 1, the stretching operating platform 6 at heating furnace body 3 rear portion supports platform 15 equipped with pressure carrying roller, pressure carrying roller supports on platform 15 equipped with pressure carrying roller 1, pressure carrying roller 2 17 and pressure carrying roller 3 18, for supporting the caudal peduncle 3 23 of prefabricated rods, equipped with cutter sweep 7 between pressure carrying roller 1 and pressure carrying roller 2 17, in stretching operating platform 6 leading section equipped with chuck 1, equipped with claw 1 on chuck 1.
Stretching operating platform 6 between heating furnace body 3 and chuck 1 is equipped with plumbago support roller 14, fixing to the prefabricated rods connected for support claw 1.
Fixing to the prefabricated rods 13 connected with claw 1, lower section plumbago support roller 14 supports, prefabricated rods 13 is moved, until prefabricated rods right side just arrives the high-temperature region of graphite heating body 1, pressure carrying roller 1 clamps the caudal peduncle three 23 identical with target rod footpath also into high-temperature region with pressure carrying roller 2 17 with lower section plumbago support roller, reach, after jointing temp, starting to extend.After target rod stretches out body of heater predetermined length in extension process, use cutter sweep 7 to continue cutting, and the target rod under cutting is transferred to other positions.
Described cutter sweep 7 has cutting driving motor, and cutting driving motor, equipped with diamond blade, can move up and down, moving range is 0 ~ 200mm, this cutter sweep level of synchronization can move in extension process, fly-cutting in movement, and playback prepares to cut next time rapidly.
The extension method step of a kind of preform is as follows:
1, prefabricated rods 13 starts after docking with caudal peduncle 3 23 to extend；
2, extension process follows the equal-volume principle before and after extending, chuck 9 send rod by constant speed in stove, constant speed ranges for 5 ~ 30mm/min, optimal value is 10 ~ 20mm/min, according to female stick footpath, target rod footpath and delivery speed, calculate the linear velocity of pressure carrying roller 1 and pressure carrying roller 2 17 according to equal-volume principle and set extension；
3, when the docking location of caudal peduncle 3 23 and prefabricated rods 13 moves to cutter sweep 7 place between pressure carrying roller 1 and pressure carrying roller 2 17, pressure carrying roller 3 18 declines and clamps caudal peduncle 3 23, cutter sweep 7 cuts, caudal peduncle 3 23 is made to separate with prefabricated rods, pressure carrying roller 3 18 rises, and caudal peduncle 3 23 is transferred to other positions；
4, continue to extend, and use cutter sweep 7 to continue cutting in predetermined length；
5 until the joint 28 extending to caudal peduncle 2 12 and parallel portion 13 arrives cutter sweep 7 position, and after having cut, extension terminates.
Described prefabricated rods 13 is based on the dopant material of quartz material.
The excellent footpath of described prefabricated rods 13 ranges for 140mm ~ 200mm.
The excellent footpath of described caudal peduncle three ranges for 40 ~ 180mm.
Described caudal peduncle is quartz material.
Described blowtorch is metal single spraying lamp, and burning gases are hydrogen (H2), and combustion-supporting gas is oxygen (O2), is divided into inside and outside oxygen.
Described left sealing shutter and right sealing shutter, internal diameter is adjustable, ranges for 0 ~ 220mm.
Described claw one, claw two and chuck three, the diameter that is installed is adjustable, ranges for 0 ~ 200mm.
Described pressure carrying roller lifting distance ranges for 0 ~ 150mm.
Described cutter sweep is diamond blade, and cut coverage is 0 ~ 200mm.
With reference to accompanying drawing 2, the service of connection devices of a kind of prefabricated rods includes caudal peduncle 1, upper tapering 11, caudal peduncle 2 12, prefabricated rods (parallel portion) 13, plumbago support roller 14, chuck 2 21, claw 2 22, upper caudal peduncle cutting docking location 24, lower caudal peduncle cutting position 25, chuck 3 29, claw 3 30.Cutting machine caudal peduncle in prefabricated rods is used to cut with parallel portion boundary 24 and lower caudal peduncle target rod footpath place 25, caudal peduncle 1 chuck 1 is fixed, the caudal peduncle 2 12 of the appropriate length in rod footpath equal to prefabricated rods 13 is fixed with claw 2 22, and support with plumbago support roller 14, with blowtorch 20, upper tapering 11 and caudal peduncle 2 12 are docked.With blowtorch 20, caudal peduncle 2 12 is docked with prefabricated rods (parallel portion) 13 after docking location is down to room temperature.
With reference to accompanying drawing 1, the extension device of a kind of preform includes graphite heating body 1, graphite insulator 2, heating furnace body 3, left sealing shutter 4, right sealing shutter 5, stretching operating platform 6, cutter sweep 7, chuck 1, claw 1, caudal peduncle 1, upper tapering 11, caudal peduncle 2 12, parallel portion 13, plumbago support roller 14, pressure carrying roller support platform 15, pressure carrying roller 1, pressure carrying roller 2 17, pressure carrying roller 3 18, caudal peduncle 3 23.Fixing to the prefabricated rods 13 connected with claw 1, lower section plumbago support roller 14 supports, prefabricated rods 13 is moved, until prefabricated rods 13 right side just arrives the high-temperature region of graphite heating body 1, pressure carrying roller 1 clamps the caudal peduncle three 23 identical with target rod footpath also into high-temperature region with pressure carrying roller 2 17 with lower section plumbago support roller, reach, after jointing temp, starting to extend.After target rod stretches out body of heater predetermined length in extension process, use cutter sweep 7 to continue cutting, and the target rod under cutting is transferred to other positions.
With reference to accompanying drawing 3, the extension method of a kind of prefabricated rods: Fig. 3 .a) ~ c) prefabricated rods starts extension with caudal peduncle caudal peduncle 3 23 after docking；Fig. 3 .d) ~ e) docking location of caudal peduncle 3 23 and prefabricated rods is when moving to cutter sweep 7 place between pressure carrying roller 1 and pressure carrying roller 2 17, pressure carrying roller 3 18 declines and clamps caudal peduncle 3 23, cutter sweep 7 cuts, caudal peduncle 3 23 is made to separate with prefabricated rods, pressure carrying roller 3 18 rises, and caudal peduncle 3 23 is transferred to other positions；Fig. 3 .f) continue to extend, and use cutter sweep 7 to continue cutting in predetermined length；Fig. 3 .g) until the joint 28 extending to caudal peduncle 2 12 and parallel portion 13 arrives cutter sweep 7 position, after having cut, extension terminates.
Described prefabricated rods 13 is based on the dopant material of quartz material.
The excellent footpath of described prefabricated rods 13 ranges for 140mm ~ 200mm.
The excellent footpath of described caudal peduncle 3 23 ranges for 40 ~ 180mm.
Described caudal peduncle is quartz material.
Described left sealing shutter 4 and right sealing shutter 5, internal diameter is adjustable, ranges for 0 ~ 220mm.
Described claw 1, claw 2 22 and chuck 3 29, the diameter that is installed is adjustable, ranges for 0 ~ 200mm.
Described pressure carrying roller lifting distance ranges for 0 ~ 150mm.
Described cutter sweep 7 is diamond blade, and cut coverage is 0 ~ 200mm.
Below in conjunction with embodiment, the utility model is described in further detail:
Embodiment one: adopt the preform mother rod that complete synthesizing process produces, rod footpath is 180mm ± 0.5mm, answering customer requirement to extend to rod footpath 120 ± 0.5mm length is the preform of 1500 ± 20mm, adopting this utility model is that to extend to rod footpath 120 ± 0.5mm length be the preform of 1500 ± 20mm to 180mm prefabricated rods mother's rod by diameter, and adopt subsequent handling to dock the caudal peduncle of corresponding size at prefabricated rods two ends, it is simple to carry out subsequent production.Extend body of heater length be 600mm, on the right side of body of heater to the distance of pressure carrying roller 2 17 be 100mm.
According to geometrical calculation in this embodiment, when female rod length is 1335mm, just extensible two excellent footpath 120mm length are the preform of 1500mm, the excellent footpath of the caudal peduncle 2 12 of middle adjunction is 180mm, length is 510mm, the excellent footpath choosing caudal peduncle 3 23 is 120mm, length is 600mm, extends female stick length and is set as 1335+100mm=1435mm, extends target rod footpath and be set as 120mm.According to Fig. 3, first caudal peduncle 3 23 is docked under the high-temperature heating of graphite heating body 1 with prefabricated rods 13, then extension is proceeded by, the delivery speed of prefabricated rods mother rod is 20mm/min, right side extends under the rotating speed of pressure carrying roller 1 and pressure carrying roller 2 17, and rotating speed is controlled according to equal-volume principle with target rod footpath by female stick footpath.
When the boundary of caudal peduncle 3 23 with prefabricated rods 13 arrives cutter sweep place, start cutting, make caudal peduncle 3 23 separate with prefabricated rods, and caudal peduncle 3 23 is transferred to other positions；Continuing to extend, when target prefabricated rods extends 1500mm, cutter sweep cuts at 1500mm place；After extension terminates automatically, prefabricated rods 13 suitably being moved to right under the support of multiple plumbago support rollers 14, the boundary in prefabricated rods 13 with caudal peduncle 2 12 cuts, and measuring the second root object rod length is 1508mm.Two root object stick footpaths and length meet the requirements of the customers, and the utilization rate of prefabricated rods mother rod is 99.85%, and the length requirement of lathe is reduced 1500mm.
Embodiment two: adopt the preform mother rod that complete synthesizing process produces, rod footpath is 180mm ± 0.5mm, prefabricated rods parallel portion rod length is 1200mm, find at the bubble having about 2mm from prefabricated rods right-hand member 500mm place sandwich layer, diameter is the preform that 180mm ± 0.5mm prefabricated rods mother's rod extends to rod footpath 80 ± 0.5mm by employing this utility model, bubble exception is excised, and adopts subsequent handling to dock the caudal peduncle of corresponding size at prefabricated rods two ends, it is simple to carry out subsequent production.Extend body of heater length be 600mm, on the right side of body of heater to the distance of pressure carrying roller 2 17 be 100mm.
According to geometrical calculation in this embodiment, the excellent footpath of the caudal peduncle 2 12 of middle adjunction is 180mm, and length is 420mm, the excellent footpath choosing caudal peduncle 3 23 is 80mm, length is 600mm, extends female stick length and is set as 1200+100mm=1300mm, extends target rod footpath and be set as 80mm；First half section can extend 80mm target rod about 2530mm, and about 10mm bubble is excised in centre, and the second half section can extend 80mm target rod about 3540mm.According to Fig. 3, first caudal peduncle 3 23 is docked under the high-temperature heating of graphite heating body 1 with prefabricated rods 13, then extension is proceeded by, the delivery speed of prefabricated rods mother rod is 20mm/min, right side extends under the rotating speed of pressure carrying roller 1 and pressure carrying roller 2 17, and rotating speed is controlled according to equal-volume principle with target rod footpath by female stick footpath.
When the boundary of caudal peduncle 3 23 with prefabricated rods 13 arrives cutter sweep place, start cutting, make caudal peduncle 3 23 separate with prefabricated rods 13, and caudal peduncle 3 23 is transferred to other positions；Continuing to extend, when target prefabricated rods extends 1265mm, cutter sweep cuts at 1260mm place, and first half section the second root object rod length is 1264mm；Second half section bubble length is 11mm, and first paragraph Cutting Length is 1180+11=1191mm, and second segment Cutting Length is 1180mm, after extension terminates automatically, prefabricated rods suitably being moved to right under the support of multiple plumbago support rollers 14, the boundary in prefabricated rods with caudal peduncle 2 12 cuts, and excises bubble 11mm；Measuring the 3rd root object rod length is 1181mm.A piece excellent footpath is 180mm ± 0.5mm, parallel portion rod length is that the prefabricated rods of 1200mm is divided into 5 sections of 80mm target rods after excision bubble is abnormal, length is 1260mm, 1264mm, 1180mm, 1180mm and 1181mm respectively, is sold to customer requirement after caudal peduncle is docked at two ends.The utilization rate of prefabricated rods mother rod is 99.65%, and the length requirement of lathe is reduced 4815mm.
Claims (6)
1. the extension device of a preform, it is characterised in that: include graphite heating body, graphite insulator, heating furnace body, left sealing shutter, right sealing shutter, stretching operating platform, cutter sweep, chuck one, claw one, plumbago support roller, pressure carrying roller support platform, pressure carrying roller one, pressure carrying roller two and pressure carrying roller three；
Heating furnace body is arranged on stretching operating platform rear portion, graphite heating body is installed in heating furnace body, graphite insulator is installed between heating furnace body and graphite heating body, the stretching operating platform at heating furnace body rear portion supports platform equipped with pressure carrying roller, pressure carrying roller supports on platform equipped with pressure carrying roller one, pressure carrying roller two and pressure carrying roller three, for supporting the caudal peduncle three of prefabricated rods, equipped with cutter sweep between pressure carrying roller one and pressure carrying roller two, in stretching operating platform leading section equipped with chuck one, equipped with claw one on chuck one；
Stretching operating platform between heating furnace body and chuck one is equipped with plumbago support roller, fixing to the prefabricated rods connected for support claw one；
Fixing to the prefabricated rods connected with claw one, lower section plumbago support roller supports, prefabricated rods is moved, until prefabricated rods right side just arrives the high-temperature region of graphite heating body, pressure carrying roller one clamps the caudal peduncle three identical with target rod footpath also into high-temperature region with pressure carrying roller two with lower section plumbago support roller, reach, after jointing temp, starting to extend；After target rod stretches out body of heater predetermined length in extension process, use cutter sweep to continue cutting, and the target rod under cutting is transferred to other positions.
2. the extension device of a kind of preform according to claim 1, it is characterized in that: described cutter sweep has cutting driving motor, cutting driving motor is equipped with diamond blade, can move up and down, moving range is 0 ~ 200mm, this cutter sweep level of synchronization can move in extension process, fly-cutting in movement, and playback prepares to cut next time rapidly.
3. the extension device of a kind of preform according to claim 1, it is characterised in that: described left sealing shutter and right sealing shutter, internal diameter is adjustable, ranges for 0 ~ 220mm.
4. the extension device of a kind of preform according to claim 1, it is characterised in that: described claw one, claw two and chuck three, the diameter that is installed is adjustable, ranges for 0 ~ 200mm.
5. the extension device of a kind of preform according to claim 1, it is characterised in that: described pressure carrying roller lifting distance ranges for 0 ~ 150mm.
6. the extension device of a kind of preform according to claim 1, it is characterised in that: described cutter sweep cut coverage is 0 ~ 200mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520972132.0U CN205368132U (en) | 2015-11-30 | 2015-11-30 | Optical fiber perform's extension equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520972132.0U CN205368132U (en) | 2015-11-30 | 2015-11-30 | Optical fiber perform's extension equipment |
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| CN205368132U true CN205368132U (en) | 2016-07-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105347663A (en) * | 2015-11-30 | 2016-02-24 | 中天科技精密材料有限公司 | Extension method and device for optical fiber perform |
| CN106746588A (en) * | 2016-12-05 | 2017-05-31 | 青海中利光纤技术有限公司 | Target rod plucking device |
-
2015
- 2015-11-30 CN CN201520972132.0U patent/CN205368132U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105347663A (en) * | 2015-11-30 | 2016-02-24 | 中天科技精密材料有限公司 | Extension method and device for optical fiber perform |
| CN105347663B (en) * | 2015-11-30 | 2017-12-22 | 中天科技精密材料有限公司 | The extension method and its equipment of a kind of preform |
| CN106746588A (en) * | 2016-12-05 | 2017-05-31 | 青海中利光纤技术有限公司 | Target rod plucking device |
| CN106746588B (en) * | 2016-12-05 | 2023-02-17 | 青海中利光纤技术有限公司 | Target bar removing device |
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