CN104211295B - A kind of optic fibre drawing apparatus and drawing process thereof - Google Patents
A kind of optic fibre drawing apparatus and drawing process thereof Download PDFInfo
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- CN104211295B CN104211295B CN201410438648.7A CN201410438648A CN104211295B CN 104211295 B CN104211295 B CN 104211295B CN 201410438648 A CN201410438648 A CN 201410438648A CN 104211295 B CN104211295 B CN 104211295B
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- 238000000034 method Methods 0.000 title claims abstract description 49
- 230000008569 process Effects 0.000 title claims abstract description 42
- 239000000835 fiber Substances 0.000 title claims abstract description 20
- 238000012681 fiber drawing Methods 0.000 claims abstract description 91
- 239000001307 helium Substances 0.000 claims abstract description 81
- 229910052734 helium Inorganic materials 0.000 claims abstract description 81
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims abstract description 81
- 239000007789 gas Substances 0.000 claims abstract description 67
- 238000005491 wire drawing Methods 0.000 claims abstract description 46
- 238000010438 heat treatment Methods 0.000 claims abstract description 35
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 20
- 239000010439 graphite Substances 0.000 claims abstract description 20
- 230000001681 protective effect Effects 0.000 claims abstract description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 68
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 50
- 239000013307 optical fiber Substances 0.000 claims description 38
- 229910052786 argon Inorganic materials 0.000 claims description 34
- 229910052757 nitrogen Inorganic materials 0.000 claims description 17
- 238000007493 shaping process Methods 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 3
- 230000008021 deposition Effects 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 229910052756 noble gas Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000005253 cladding Methods 0.000 description 19
- 229910001873 dinitrogen Inorganic materials 0.000 description 16
- 239000012071 phase Substances 0.000 description 9
- 238000012423 maintenance Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 7
- 238000007664 blowing Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- UDWPONKAYSRBTJ-UHFFFAOYSA-N [He].[N] Chemical compound [He].[N] UDWPONKAYSRBTJ-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007380 fibre production Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
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Abstract
The present invention relates to optic fibre manufacturing technology field, particularly a kind of optic fibre drawing apparatus and drawing process thereof.It includes fiber drawing furnace body of heater and gas control equipment; graphite heating component, heating coil and inert protective gas passage are set in described body of heater; described gas control equipment is connected with inert protective gas passage and controls its gas flow; body of heater is provided above hanging rod platform; preform tail end is connected with hanging rod platform by quartz glass tail pipe, and body of heater outlet lower section sets gradually cooling tube, applicator, solidified cell and traction apparatus.It determines normal wire drawing helium atmosphere flow according to the internal diameter size of fiber drawing furnace graphite heating component；At the helium atmosphere flow that different process phase sets is different；To different operation stages, it is defined according to technological parameters such as drawing speed, fiber drawing furnace temperature, thus realizing automatically controlling of different process stage helium atmosphere flow, saving energy resource consumption, reducing production cost.
Description
Technical field
The present invention relates to optic fibre manufacturing technology field, particularly a kind of optic fibre drawing apparatus and drawing process thereof.
Background technology
Drawing optical fibers is exactly by preform thermoplastic and is drawn into the optical fibers of suitable dimension the process of applying coating.Owing to the softening of preform needs the high temperature of 2000 DEG C, currently mainly adopt induction furnace and resistance furnace, the heating element heater of both fiber drawing furnaces is all mainly graphite, and graphite piece at high temperature easily aoxidizes, thus causing the problem that the intensity of drawn optical fiber is deteriorated, for preventing the oxidation of graphite heating component, need to keep atmosphere of inert gases in fiber drawing furnace, the method generally taked at present is in drawing process, a certain amount of argon is passed in fiber drawing furnace, nitrogen, the gases such as helium, in conjunction with the sealing between fiber drawing furnace upper and lower opening and preform, the oxygen in external environment is stoped to enter inside fiber drawing furnace.
Development along with preform manufacturing process, the specification of preform size gets more and more, owing to the preform of major diameter or super-large diameter is improving the utilization rate of prefabricated rods, increase the advantage in device efficiency etc., based on the consideration reducing optical fiber production cost, the preform of large scale or oversize increasingly receives an acclaim.Increase along with preform size, the internal diameter of fiber drawing furnace heating element heater also increases therewith, gap between preform and heating element heater also increases therewith, research shows, there are radiation heat conduction and convective heat transfer two parts in the conduction process between heating element heater and preform, along with the uniformity increasing convective heat transfer in the gap between heating element heater and preform is deteriorated, the non-circularity of cladding of optical fiber and the fluctuation of bare fibre external diameter become to be difficult to control to, owing to the heat transfer property of helium is comparatively excellent, the flow increasing He can effectively improve the uniformity of convective heat transfer, and then improve the uniformity of temperature field distribution in fiber drawing furnace, therefore also widely use helium in the wire drawing of optical fiber produces.But helium is non-renewable resources, along with helium extensive use in the industrial production, the minimizing day by day of helium ore resources, the use cost of helium continues to increase, and the optical fiber procurement price of each purchaser continues to drop in recent years, therefore how to reduce the cost of helium in drawing optical fibers production process and become the study hotspot of optical fiber industry in recent years.
In fiber drawing process, the total amount of process gas needed for various types of prefabricated rods and the ratio of each gas are different, current published patent is all pass into process gas with same flow and constant, the difference of the type of different according to the size of heating element heater but without patent from preform determines the total amount of required process gas and the proportioning of each process gas, also without the patent flow according to the different change process gas in the gap between wire drawing each stepwise heating element and preform and ratio.
Summary of the invention
For the deficiency existed in prior art, the present invention provides a kind of internal diameter size according to fiber drawing furnace graphite heating component to determine the different helium atmosphere flow of normal wire drawing helium atmosphere flow, different process phase sets, saves the energy, the optic fibre drawing apparatus reducing cost and drawing process thereof.
To achieve these goals, the present invention realizes by the following technical solutions:
A kind of optic fibre drawing apparatus; it includes fiber drawing furnace body of heater and gas control equipment; graphite heating component, heating coil and inert protective gas passage are set in described body of heater; described control device is connected with inert protective gas passage and controls its gas flow; body of heater is provided above hanging rod platform; preform tail end is connected with hanging rod platform by quartz glass tail pipe, and body of heater outlet lower section sets gradually cooling tube, applicator, solidified cell and traction apparatus.
Above-mentioned a kind of optic fibre drawing apparatus, its described inert protective gas passage includes argon or nitrogen and helium passages.
Preform is softened by the heating element heater that a kind of method of drawing optical fibers is mainly in fiber drawing furnace; the optical fiber of pull-out required diameter; cool down through cooling tube; applicator is coated the coating with protective effect; after coating is solidified by cured unit; then through traction apparatus on Optical Fiber Winding cylinder, until the whole drawing optic fibre of effective deposition fraction of preform, close fiber drawing furnace；In each stage of drawing process, controlling device and automatically control the amount of helium in noble gas that passes into, it comprises the following steps:
1) selecting suitable graphite heating component according to optical fiber prefabricating rod outside diameter, the gas flow according to the normal wire drawing stages helium of the Size calculation of graphite heating component, to ensure that the helium atmosphere flow velocity of the optical fiber shaping area of fiber drawing furnace body of heater is be more than or equal to 0.10m/min；
2) erection stage: the preform being connected to quartz glass tail pipe is lifted into rod platform, and by preform centering, optical fiber prefabricating nose slowly enters the heating chamber of fiber drawing furnace body of heater, erection stage fiber drawing furnace temperature is less than standby temperature, gas control equipment passes into argon or nitrogen, closedown helium passes into, and opens fiber drawing furnace；
3) start and ramp-up stage: when fiber drawing furnace temperature is more than standby temperature, and drawing speed less than or equal to target velocity time, gas control equipment keeps step 2) in the gas flow of argon or nitrogen, pass into helium atmosphere flow be more than or equal to step 1) gas flow of normal wire drawing stages helium determined；
4) normal wire drawing stages: when fiber drawing furnace temperature is more than standby temperature, when drawing speed reaches target velocity, gas control equipment keeps step 2) in the gas flow of argon or nitrogen, gradually reduce helium atmosphere flow in fiber drawing furnace to step 1) gas flow of normal wire drawing stages helium determined；
5) wire drawing finishing phase: fiber drawing furnace temperature is less than standby temperature, and drawing speed reduces to 0, gas control equipment keeps step 2) in the gas flow of argon or nitrogen, and progressively helium atmosphere flow in fiber drawing furnace is reduced to 0.
Above-mentioned a kind of optical fiber drawing method, its described step 3) and 4) fiber drawing furnace temperature is more than standby temperature, and drawing speed moment is when reducing to 0, gas control equipment keeps step 2) in the gas flow of argon or nitrogen, progressively helium atmosphere flow is increased to be more than or equal to step 1) gas flow of normal wire drawing stages helium determined, perform step 3 more successively), 4), 5), until wire drawing finishing phase.
Above-mentioned a kind of optical fiber drawing method, its described step 1) ensure that the helium atmosphere flow velocity of optical fiber shaping area of fiber drawing furnace body of heater is be more than or equal to 0.10m/min, preferably it is controlled at be more than or equal to 0.15m/min, so can obtain better fibre cladding diameter and non-circularity of cladding.
Above-mentioned a kind of optical fiber drawing method, its described step 2), step 3), step 4), step 5) in standby temperature less than 1500 DEG C.
Above-mentioned a kind of optical fiber drawing method, its described step 3) the helium atmosphere flow passed into ramp-up stage of starting is be more than or equal to step 1) gas flow of normal wire drawing stages helium determined, it is preferably greater than equal to step 1) determine 2 times of the gas flow of normal wire drawing stages helium, so can obtain better fibre cladding diameter and non-circularity of cladding.
Beneficial effect:
The preform of present invention foundation various outer diameter and the different phase of drawing process, gap between heated silica glass member and heating element heater is different, the problem that the size variation in gap will affect the uniformity in temperature field, its innovative point is in that: first, determines normal wire drawing helium atmosphere flow according to the internal diameter size of fiber drawing furnace graphite heating component；Second, according to the helium atmosphere flow that the different process phase sets of preform drawing in actual production process is different；3rd, to different operation stages, it is possible to be defined according to the technological parameter such as temperature of drawing speed, fiber drawing furnace, thus realizing automatically controlling of different process stage helium atmosphere flow, saving energy resource consumption, reducing production cost.
Accompanying drawing explanation
The present invention is described in detail below in conjunction with the drawings and specific embodiments；
Fig. 1 is the structural representation of apparatus of the present invention.
Fig. 2 is fiber drawing furnace furnace interior structural representation of the present invention.
Fig. 3 is the schematic flow sheet of drawing process of the present invention.
Fig. 4 is the fiber drawing furnace furnace interior structural representation of embodiment 1.
Fig. 5 is the cladding diameter scattergram of embodiment 1 drawing process.
Fig. 6 is the non-circularity of cladding scattergram of embodiment 1 drawing process.
Fig. 7 is the fiber drawing furnace furnace interior structural representation of embodiment 2.
Fig. 8 is the cladding diameter scattergram of embodiment 2 drawing process.
Fig. 9 is the non-circularity of cladding scattergram of embodiment 2 drawing process.
Figure 10 is the fiber drawing furnace furnace interior structural representation of embodiment 3.
Figure 11 is the cladding diameter scattergram of embodiment 3 drawing process.
Figure 12 is the non-circularity of cladding scattergram of embodiment 3 drawing process.
Detailed description of the invention
For the technological means making the present invention realize, creation characteristic, reach purpose and effect and be easy to understand, below in conjunction with detailed description of the invention, the present invention is expanded on further.
See figures.1.and.2; the wire-drawing frame of the present invention includes fiber drawing furnace body of heater 1 and gas control equipment; graphite heating component, heating coil 2 and inert protective gas passage are set in described body of heater 1; inert protective gas passage includes argon or nitrogen helium passages, and described gas control equipment is connected with inert protective gas passage and controls its gas flow.Body of heater 1 is provided above hanging rod platform 3, and preform 4 tail end is connected with hanging rod platform 3 by quartz glass tail pipe 5, and by preform 4 centering, preform 4 front end enters fiber drawing furnace heating chamber.Body of heater 1 outlet lower section sets gradually cooling tube 6, applicator 7, solidified cell 8 and traction apparatus 9.
As in figure 2 it is shown, the internal diameter of fiber drawing furnace graphite heating component is set to r1, the main barred body part maximum gauge of preform 4 is set to r2, external diameter r according to preform 42Select suitable graphite heating component; Size calculation according to graphite heating component passes into the helium atmosphere flow in fiber drawing furnace 1 in inert protective gas; its requirement is to ensure that normal wire drawing stages optical fiber shaping area; namely the helium atmosphere flow velocity in c district is not less than 0.15m/min, then the gas flow passed into during normal wire drawing is 0.15* π * r1 2/ 4, wherein r1Unit be m.Drawing optical fibers start cut cone and ramp-up stage be preform reduced diameter portion formed stage, taper directly affects the parameters such as the core-cladding concentricity error of pulled out optical fiber, non-circularity of cladding, wire drawing start cut cone and ramp-up stage control helium atmosphere flow should be greater than normal wire drawing stages helium atmosphere flow.
With reference to Fig. 3, in drawing process, it is possible to define each operation stage of wire drawing according to drawing speed and fiber drawing furnace temperature, arrange automatic control program, it is achieved each operation stage helium atmosphere flow of wire drawing automatically control minimizing human intervention.When fiber drawing furnace temperature is less than 1500 DEG C, control device and automatically identify that this stage is in the blowing out stage, only pass into argon or nitrogen protection, close helium；When fiber drawing furnace temperature is more than 1500 DEG C, and speed less than or equal to target velocity time, control device and automatically identify that this stage is in the stage of starting (including the intensification stage of turning around, the stage of reeling off raw silk from cocoons, ramp-up stage), keeping on the argon that passes into or the constant basis of nitrogen gas flow, automatically pass into 2*0.15* π * r1 2The helium of/4L/min；When fiber drawing furnace temperature is more than 1500 DEG C, drawing speed reaches target velocity, controls device and automatically identifies that wire drawing raising speed reaches steady statue, enters normal wire drawing stages, keep the argon that passes into or nitrogen gas flow constant, gradually reduce helium atmosphere flow in fiber drawing furnace to 0.15* π * r1 2/4L/min；When fiber drawing furnace temperature is more than 1500 DEG C, and when drawing speed moment reduces to 0, controlling device and automatically identify that wire-drawer-tower break state, maintenance argon or nitrogen gas flow are constant, and helium atmosphere flow progressively increases to 2*0.15* π * r1 2/ 4L/min, more successively perform start, raising speed, normal drawing step；When fiber drawing furnace temperature is less than 1500 DEG C, and drawing speed reduces to 0, controls device and automatically identifies that this stage is wire drawing finishing phase, and argon or nitrogen gas flow that maintenance passes into are constant, automatically progressively helium atmosphere in fiber drawing furnace are reduced to 0.
Below by specific embodiment, the present invention is described in further detail, below three embodiments include the wire drawing embodiment of external diameter 140mm, external diameter 180mm, external diameter 200mm preform respectively.
Embodiment one:
As shown in Figure 4, use external diameter 140mm preform drawing, select the internal diameter r of graphite heating component1For 164mm, for ensureing normal wire drawing stages, the gas flow rate of optical fiber shaping area helium is not less than 0.15m/min, according to V=0.15* π * r1 2/ 4 calculate that to pass into the flow of helium in the inert protective gas of fiber drawing furnace be 3.2L/min.Fiber drawing furnace softens the optical fiber of preform, pull-out required diameter; cool down through cooling tube, applicator coats the coating with protective effect; after solidified cell solidifies through traction apparatus on Optical Fiber Winding cylinder; until effective deposition fraction of preform all pulls into acceptable splice, close fiber drawing furnace.In drawing process, when fiber drawing furnace temperature is lower than 1500 DEG C, control device and automatically identify that this stage is in the blowing out stage, only pass into argon or nitrogen protection, close helium；When fiber drawing furnace temperature is more than 1500 DEG C, and speed less than or equal to 1500m/min time, control device automatically identifies that this stage is in and starts and ramp-up stage (including the intensification stage of turning around, the stage of reeling off raw silk from cocoons, ramp-up stage), control device keeping on the argon that passes into or the constant basis of nitrogen gas flow, automatically pass into the helium of 6.4L/min；When fiber drawing furnace temperature is more than 1500 DEG C, drawing speed reaches 1500m/min, control device and automatically identify that wire drawing raising speed reaches steady statue, enter normal wire drawing stages, controlling device keeps the argon that passes into or nitrogen gas flow constant, gradually reduces helium atmosphere flow in fiber drawing furnace to 3.2L/min；When fiber drawing furnace temperature is more than 1500 DEG C, and drawing speed moment is when reducing to 0, controls device and automatically identify that wire-drawer-tower break state, controls device maintenance argon or nitrogen gas flow is constant, progressively helium atmosphere flow is increased to 6.4L/min, then perform successively to start, raising speed, normal drawing step；When fiber drawing furnace temperature is less than 1500 DEG C, and drawing speed reduces to 0, controls device and automatically identifies that this stage is wire drawing finishing phase, and argon or nitrogen gas flow that control device maintenance passes into are constant, automatically progressively helium atmosphere in fiber drawing furnace are reduced to 0.
Owing between drawing process stage each in preform drawing process, the change of helium atmosphere flow is all carry out with only small step-length, the air-flow in fiber drawing furnace is made to be in more stable state all the time, ensure that obvious change does not occur all the time for the cladding diameter of optical fiber in drawing process and non-circularity of cladding, with reference to shown in Fig. 5, Fig. 6.
Embodiment two:
As it is shown in fig. 7, use external diameter 180mm preform drawing, select the internal diameter r of graphite heating component1For 216mm, for ensureing normal wire drawing stages, the gas flow rate of optical fiber shaping area helium is not less than 0.15m/min, according to V=0.15* π * r1 2/ 4 calculate that to pass into the flow of helium in the inert protective gas of fiber drawing furnace be 5.5L/min.In drawing process, when fiber drawing furnace temperature is less than 1500 DEG C, control device and automatically identify that this stage is in the blowing out stage, only pass into argon or nitrogen protection, close helium；When fiber drawing furnace temperature is more than 1500 DEG C, and speed less than or equal to 1800m/min time, control device automatically identifies that this stage is in and starts and ramp-up stage (including the intensification stage of turning around, the stage of reeling off raw silk from cocoons, ramp-up stage), control device keeping on the argon that passes into or the constant basis of nitrogen gas flow, automatically pass into the helium of 11L/min；When fiber drawing furnace temperature is more than 1500 DEG C, drawing speed reaches 1800m/min, control device and automatically identify that wire drawing raising speed reaches steady statue, enter normal wire drawing stages, controlling device keeps the argon that passes into or nitrogen gas flow constant, gradually reduces helium atmosphere flow in fiber drawing furnace to 5.5L/min；When fiber drawing furnace temperature is more than 1500 DEG C, and drawing speed moment is when reducing to 0, controls device and automatically identify that wire-drawer-tower break state, controls device maintenance argon or nitrogen gas flow is constant, progressively helium atmosphere flow is increased to 11L/min, then perform successively to start, raising speed, normal drawing step；When fiber drawing furnace temperature is less than 1500 DEG C, and drawing speed is 0, controlling device and automatically identify that this stage is wire drawing finishing phase, argon or nitrogen gas flow that control device maintenance passes into are constant, automatically progressively with the step-length of 0.1L/min, helium atmosphere in fiber drawing furnace are reduced to 0.
Owing between drawing process stage each in preform drawing process, the change of helium atmosphere flow is all carry out with only small step-length, the air-flow in fiber drawing furnace is made to be in more stable state all the time, ensure that obvious change does not occur all the time for the cladding diameter of optical fiber in drawing process and non-circularity of cladding, as shown in Figure 8 and Figure 9.
Embodiment three:
As shown in Figure 10, use external diameter 200mm preform drawing, select the internal diameter r of graphite heating component1For 226mm, for ensureing normal wire drawing stages, the gas flow rate of optical fiber shaping area helium is not less than 0.15m/min, according to V=0.15* π * r1 2/ 4 calculate that to pass into the flow of helium in the inert protective gas of fiber drawing furnace be 6L/min.In drawing process, when fiber drawing furnace temperature is less than 1500 DEG C, control device and automatically identify that this stage is in the blowing out stage, only pass into argon or nitrogen protection, close helium；When fiber drawing furnace temperature is more than 1500 DEG C, and speed less than or equal to 2000m/min time, control device automatically identifies that this stage is in and starts and ramp-up stage (including the intensification stage of turning around, the stage of reeling off raw silk from cocoons, ramp-up stage), control device keeping on the argon that passes into or the constant basis of nitrogen gas flow, automatically pass into the helium of 12L/min；When fiber drawing furnace temperature is more than 1500 DEG C, drawing speed reaches 2000m/min, controls device and automatically identifies that wire drawing raising speed reaches steady statue, enters normal wire drawing stages, controlling device keeps the argon that passes into or nitrogen gas flow constant, gradually reduces helium atmosphere flow in fiber drawing furnace to 6L/min；When fiber drawing furnace temperature is more than 1500 DEG C, and drawing speed moment is when reducing to 0, controls device and automatically identify that wire-drawer-tower break state, controls device maintenance argon or nitrogen gas flow is constant, progressively helium atmosphere flow is increased to 12L/min, then perform successively to start, raising speed, normal drawing step；When fiber drawing furnace temperature is less than 1500 DEG C, and drawing speed is 0, controls device and automatically identifies that this stage is wire drawing finishing phase, and argon or nitrogen gas flow that control device maintenance passes into are constant, automatically progressively helium atmosphere in fiber drawing furnace are reduced to 0.
Owing between drawing process stage each in preform drawing process, the change of helium atmosphere flow is all carry out with only small step-length, the air-flow in fiber drawing furnace is made to be in more stable state all the time, ensure that obvious change does not occur all the time for the cladding diameter of optical fiber in drawing process and non-circularity of cladding, as is illustrated by figs. 11 and 12.
The ultimate principle of the present invention and principal character and advantages of the present invention have more than been shown and described.Skilled person will appreciate that of the industry; the present invention is not restricted to the described embodiments; described in above-described embodiment and description is that principles of the invention is described; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements both fall within the claimed scope of the invention.Claimed scope is defined by appending claims and equivalent thereof.
Claims (6)
1. an optic fibre drawing apparatus; it is characterized in that; including fiber drawing furnace body of heater and gas control equipment; graphite heating component, heating coil and inert protective gas passage are set in described body of heater; described gas control equipment is connected with inert protective gas passage and controls its gas flow; body of heater is provided above hanging rod platform, and preform tail end is connected with hanging rod platform by quartz glass tail pipe, and body of heater outlet lower section sets gradually cooling tube, applicator, solidified cell and traction apparatus；
Based on the method that above-mentioned wire-drawing frame carries out drawing optical fibers; comprise the following steps: preform is softened by the heating element heater in fiber drawing furnace; the optical fiber of pull-out required diameter; cool down through cooling tube; applicator is coated the coating with protective effect, after coating is solidified by cured unit, then through traction apparatus on Optical Fiber Winding cylinder; until the whole drawing optic fibre of effective deposition fraction of preform, close fiber drawing furnace；
In each stage of drawing process, gas control equipment automatically controls the amount of helium in noble gas that passes into, and it comprises the following steps:
1) selecting suitable graphite heating component according to optical fiber prefabricating rod outside diameter, the gas flow according to the normal wire drawing stages helium of the Size calculation of graphite heating component, to ensure that the helium atmosphere flow velocity of the optical fiber shaping area of fiber drawing furnace body of heater is be more than or equal to 0.10m/min；
2) erection stage: the preform being connected to quartz glass tail pipe is lifted into rod platform, and by preform centering, optical fiber prefabricating nose slowly enters the heating chamber of fiber drawing furnace body of heater, erection stage fiber drawing furnace temperature is less than standby temperature, gas control equipment passes into argon or nitrogen, closedown helium passes into, and opens fiber drawing furnace；
3) start and ramp-up stage: when fiber drawing furnace temperature is more than standby temperature, and drawing speed less than or equal to target velocity time, gas control equipment keeps step 2) in the gas flow of argon or nitrogen, pass into helium atmosphere flow be more than or equal to step 1) gas flow of normal wire drawing stages helium determined；
4) normal wire drawing stages: when fiber drawing furnace temperature is more than standby temperature, when drawing speed reaches target velocity, gas control equipment keeps step 2) in the gas flow of argon or nitrogen, gradually reduce helium atmosphere flow in fiber drawing furnace to step 1) gas flow of normal wire drawing stages helium determined；
5) wire drawing finishing phase: fiber drawing furnace temperature is less than standby temperature, and drawing speed reduces to 0, gas control equipment keeps step 2) in the gas flow of argon or nitrogen, and progressively helium atmosphere flow in fiber drawing furnace is reduced to 0.
2. a kind of optic fibre drawing apparatus according to claim 1, it is characterised in that described inert protective gas passage includes argon or nitrogen and helium passages.
3. a kind of optic fibre drawing apparatus according to claim 1 and 2, it is characterized in that, described step 3) and 4) fiber drawing furnace temperature is more than standby temperature, and drawing speed moment is when reducing to 0, gas control equipment keeps step 2) in the gas flow of argon or nitrogen, progressively helium atmosphere flow is increased to be more than or equal to step 1) gas flow of normal wire drawing stages helium determined, then perform step 3 successively), 4), 5), until wire drawing finishing phase.
4. a kind of optic fibre drawing apparatus according to claim 1 and 2, it is characterised in that described step 1) ensure that the helium atmosphere flow velocity of optical fiber shaping area of fiber drawing furnace body of heater is be more than or equal to 0.15m/min.
5. a kind of optic fibre drawing apparatus according to claim 1 and 2, it is characterised in that described step 2), step 3), step 4), step 5) in standby temperature less than 1500 DEG C.
6. a kind of optic fibre drawing apparatus according to claim 1 and 2, it is characterised in that described step 3) the helium atmosphere flow passed into ramp-up stage of starting is be more than or equal to step 1) determine 2 times of the gas flow of normal wire drawing stages helium.
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| CN104944763A (en) * | 2015-06-05 | 2015-09-30 | 江苏斯德雷特通光光纤有限公司 | Technology for reducing He flow in wire drawing furnace by PID software trigger function |
| JP2017171549A (en) * | 2016-03-25 | 2017-09-28 | 信越化学工業株式会社 | Optical fiber preform contraction processing method, and processing device |
| CN108863043A (en) * | 2017-05-12 | 2018-11-23 | 北京回能环保科技有限公司 | A kind of fiber drawing furnace cooling tube helium collector |
| CN107601843B (en) * | 2017-09-06 | 2023-08-18 | 通鼎互联信息股份有限公司 | Sleeve rod wire drawing device, sleeve rod wire drawing system and sleeve rod wire drawing method |
| CN108503237A (en) * | 2018-02-05 | 2018-09-07 | 张广山 | A kind of equipment for optical fiber processing |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1500754A (en) * | 2002-11-13 | 2004-06-02 | ס�ѵ�����ҵ��ʽ���� | Method of drawing optical fiber and apparatus for implementing the method |
| CN103269990A (en) * | 2010-10-19 | 2013-08-28 | 住友电气工业株式会社 | Sealing structure for optical fiber drawing furnace |
| CN103819084A (en) * | 2014-02-08 | 2014-05-28 | 江苏通鼎光电股份有限公司 | Novel optical fiber drawing furnace |
-
2014
- 2014-08-29 CN CN201410438648.7A patent/CN104211295B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1500754A (en) * | 2002-11-13 | 2004-06-02 | ס�ѵ�����ҵ��ʽ���� | Method of drawing optical fiber and apparatus for implementing the method |
| CN103269990A (en) * | 2010-10-19 | 2013-08-28 | 住友电气工业株式会社 | Sealing structure for optical fiber drawing furnace |
| CN103819084A (en) * | 2014-02-08 | 2014-05-28 | 江苏通鼎光电股份有限公司 | Novel optical fiber drawing furnace |
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