CN103979789B - Fibre drawing furnace - Google Patents
Fibre drawing furnace Download PDFInfo
- Publication number
- CN103979789B CN103979789B CN201410049032.0A CN201410049032A CN103979789B CN 103979789 B CN103979789 B CN 103979789B CN 201410049032 A CN201410049032 A CN 201410049032A CN 103979789 B CN103979789 B CN 103979789B
- Authority
- CN
- China
- Prior art keywords
- core tube
- furnace core
- undergauge
- furnace
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
The present invention provides a kind of fibre drawing furnace, and it realizes drawing optical fibers using the furnace core tube with reducing diameter part corresponding with the bottom for heating melting of base glass material, it is possible to increase the efficiency of heating surface of base glass material, realizes power saving.Fiber drawing furnace（10）In stove framework（16）Inside have：Furnace core tube（13）；Heater（14）, it is heated to the furnace core tube；And the 1st heat-barrier material（15a）, it surrounds the outside of the furnace core tube, and the fiber drawing furnace is used for glass base material for optical fiber（11）It is inserted in furnace core tube and heats melting, draws out optical fiber（12）.Furnace core tube（13）Have：Reducing diameter part（13a）, its internal diameter is from heater（14）Central portion start, be taper towards lower end undergauge；And undergauge pipe portion（13b）, it is in heater（14）Lower section, external diameter also carried out undergauge, is also configured to suppress the 2nd heat-barrier material of radiating in the space segment between the undergauge pipe portion and the 1st heat-barrier material in caused stove framework（15b）.
Description
Technical field
The present invention relates to a kind of heat glass base material for optical fiber to melt and draw out the fibre drawing furnace of optical fiber.
Background technology
Fibre drawing furnace is configured to, and is configured with stove framework：Furnace core tube, it is female to insert fiber glass to furnace core tube inside
Material（Hereinafter referred to as base glass material）；The heaters such as heater, it is heated to the furnace core tube；And heat-barrier material, its from
Outside surrounds the furnace core tube and heater, suppresses heat and is discharged to outside.Use is by isotropic graphite in furnace core tube
The carbon larger etc. the pyroconductivity of composition（carbon）, in order to improve effect of heat insulation, heat-barrier material uses the carbon of Porous.Stove frame
Body is formed by the metal of corrosion resistance, is formed as water-cooling structure.
In order to prevent the furnace core tube from aoxidizing, and argon gas is sent into furnace core tube（Ar）, helium（He）Deng rare gas or nitrogen
Gas（N2）（Hereinafter referred to as inert gas etc.）.In addition, in order to prevent heat-barrier material and furnace core tube etc. from aoxidizing, also into stove framework
It is sent into inert gas etc..
If near the bottom of the base glass material in heating molten condition, the air-flow wadding of gas is random in furnace core tube,
External diameter variation that then may be to optical fiber etc. impacts.In JPS62-162647A（Patent document 1）、JP H8-91862A（Patent
Document 2）In disclose the description below：In order that the gas in furnace core tube layeredly flows along base glass material and optical fiber, with place
Shape in the bottom of the base glass material of molten condition is corresponding, is cone by the internal diameter undergauge of furnace core tube（taper）Shape.
The content of the invention
It is an object of the present invention to provide a kind of efficiency of heating surface that can improve base glass material, the optical fiber of power saving is realized
Fiber drawing furnace.
In order to realize purpose, there is provided a kind of fibre drawing furnace, it has in stove framework：Furnace core tube；Heater, its is right
The furnace core tube is heated；And the 1st heat-barrier material, it surrounds the outside of the furnace core tube, and the fibre drawing furnace is used for light
Fibre is inserted in furnace core tube with base glass material and heats melting, draws out optical fiber, the fibre drawing furnace is characterised by, furnace core tube
Have：Reducing diameter part, its internal diameter are taper towards lower end undergauge since the central portion of heater；And undergauge pipe portion, at it
In the lower section of heater, external diameter has also carried out undergauge, between undergauge pipe portion and the 1st heat-barrier material in caused stove framework
The 2nd heat-barrier material for suppressing radiating is also configured with space segment.
The internal diameter of 2nd heat-barrier material is preferably smaller compared with the external diameter without the position of undergauge of furnace core tube, and with not
The size that can be contacted due to thermal expansion when heating with undergauge pipe portion.
The effect of invention
According to fibre drawing furnace involved in the present invention, can efficiently suppress by the furnace core tube after heating devices heat
Heat radiates to stove framework, it is possible to increase the efficiency of heating surface of fibre drawing furnace, realizes power saving.
Brief description of the drawings
Fig. 1 is the concept map for the embodiment for representing fibre drawing furnace involved in the present invention.
Fig. 2 is the concept map for the fibre drawing furnace for representing prior art.
Fig. 3 is the concept map for the fibre drawing furnace for representing prior art.
Embodiment
Fig. 2 is the concept map for representing the fiber drawing furnace 20 disclosed in patent document 1.Fiber drawing furnace 20 have furnace core tube 23 and
The heater 4 heated to the furnace core tube, by the way that glass base material for optical fiber 1 is inserted into furnace core tube 23 and heats melting,
So as to draw out optical fiber 2.Optical fiber 2 from the central portion positioned at heater 4 and in molten condition base glass material bottom 1a
Hang down and draw downwards.Furnace core tube 23 has：Reducing diameter part 23a, its internal diameter is with along the bottom 1a of base glass material shape
Mode undergauge is taper；And undergauge pipe portion 23b, it is by the uniform bore diameter after undergauge and the uniform outer diameter structure of the non-undergauge of external diameter
Into.
According to fiber drawing furnace 20, the inert gas in furnace core tube 23 can be made to be formed as laminar flow, fibre external diameters can be suppressed
Change.According to fiber drawing furnace 20, it is believed that radiant heat can be separated by the reducing diameter part 23a below furnace core tube, it is uniformly and high
Effect ground heats to base glass material 1, but the wall thickness for being formed as due to undergauge pipe portion 23b pipe is thicker, the less shape of thermal resistance, because
The problem of this, exists due to heat transfer and makes heat easily to discharging outside furnace core tube, and the efficiency of heating surface reduces.
Fig. 3 is the concept map for representing the fiber drawing furnace 30 disclosed in patent document 2.Fiber drawing furnace 30 in the same manner as fiber drawing furnace 20,
There is furnace core tube 33, the heater 4 heated to the furnace core tube in stove framework 6 and surround the heater heat-insulated
Material 5, glass base material for optical fiber 1 is inserted into furnace core tube 33 and heats melting, draws out optical fiber 2.But furnace core tube 33
Difference is have：Reducing diameter part 33a, its internal diameter undergauge in a manner of the shape along the bottom 1a of base glass material is taper；
And undergauge pipe portion 33b, it matches with the internal diameter after undergauge, external diameter has been carried out undergauge.
There is fiber drawing furnace 30 undergauge pipe portion 33a, undergauge pipe portion 33a to have the undergauge pipe portion 23b of fiber drawing furnace 20 pipe
The thinning shape of wall thickness, heat can be suppressed and discharged due to heat transfer to stove framework 6.However, in undergauge pipe portion 33b with adding
Space is produced between hot device 4 and heat-barrier material 5 bottom, a part for the heat from heater directly radiates to the side of stove framework 6,
The problem of being reduced with fiber drawing furnace 20 similarly, the presence of the efficiency of heating surface.
Fig. 1 is to represent the embodiments of the present invention i.e. concept map of fibre drawing furnace 10.Below, with by heater to stove
Illustrated exemplified by the resistance furnace that core pipe is heated, but the present invention may also apply to apply high frequency electric source to coil, to combustion chamber
Pipe carries out the induction furnace of sensing heating.
The wire drawing of optical fiber is to carry out wire drawing by following manner, i.e. the bottom of the base glass material 11 of suspension strut is entered
Row heating, makes optical fiber（Glass optical fiber）12 hang down from the bottom 11a meltings of melting, and are formed as defined external diameter.For entering
The fibre drawing furnace 10 of row wire drawing is configured to, and is configured in a manner of the furnace core tube 13 that base glass material 1 is supplied for inserting is surrounded
Heater（Hereinafter referred to as heater）14, utilize the 1st heat-insulated material in a manner of the heat for not making heater 14 scatters and disappears to outside
Material 15a surrounds heater 14, and their outside entirety is surrounded by stove framework 16.
Base glass material 11 passes through mother metal hitch（Omit diagram）Suspension strut, with the progress of drawing optical fibers, by
Control and move successively downwards.Stove framework 16 is formed by the metal of the excellent corrosion resistances such as stainless steel, central part configuration by
The cylindric furnace core tube 13 that the carbon of high-purity is formed.In order to prevent furnace core tube 13 from aoxidizing, deteriorating, and imported into furnace core tube 13
The rare gas such as Ar, He gas or N2Gas（Hereinafter referred to as inert gas etc.）.The inert gas etc. passes through base glass material and stove
The gap of core pipe 13, its major part discharge via the extension tube 17 for being arranged on the lower section of furnace core tube 13 to outside.
In addition, for the heat-barrier material 15a of heater 14 and the 1st of anti-blocking oxidation, deteriorate, in the same manner as described above,
Also Ar, He, N are flowed into stove framework 162Inert gases such as gas etc..The gas of stove framework 16 is flowed into, with flowing into furnace core tube 13
Interior gas is independently controlled, but usually using identical gas.
Furnace core tube 13 via the furnace core tube load bearing component 18 being made up of the resistance to electrical insulation material such as quartz preferably to load
Mode on the lower wall of stove framework 16 is supported.It is used as the furnace core tube load bearing component 18 of insulator by configuring, so that will
Furnace core tube 13 and the electric insulation of stove framework 16, there occurs during generating between heater 14 and furnace core tube 13, short circuit will not be caused
Accident occurs.But furnace core tube load bearing component 18 is not limited to quartz, carbon is also used sometimes, or not via furnace core tube supporting part
Part 18 but furnace core tube 13 is directly positioned in stove framework 16.
In the present invention, furnace core tube 13 is by base glass material resettlement section（Upper portion）13c, reducing diameter part 13a and undergauge pipe portion 13b
Form.Reducing diameter part 13a is provided adjacent to upper portion 13c, and its internal diameter is with along the bottom 11a of fibre parent material 11 undergauge shape
Mode, with away from upper portion 13c, from the central portion of heater 14 initially towards lower end undergauge into cone（taper）Shape.Thus,
Make the steady air currents such as the inert gas below flow direction, also, realize the suppression of the radiating to heater 14 downwards, improve
The efficiency of heating surface.As the specific method for improving the efficiency of heating surface, consist of, positioned at reducing diameter part 13a lower section（With upper portion
Connect the opposite side of side）And locate on the lower compared with the lower end of heater 14, the external diameter contracting smaller than the external diameter of upper portion is set
Footpath pipe portion 13b, fill the 2nd heat-barrier material 15b in caused spatial portion to the undergauge due to external diameter and suppress to radiate.
So-called reducing diameter part 13a, refer to relative to rise from heating-up temperature the central portion region of highest heater 14 is opened
Begin untill near the 14a of heater lower end, make internal diameter downward with the position of the scope of the gradual undergauge of taper.Reducing diameter part 13a
It is directly to be heated by heater 14, contributes to the region of the heating melting of base glass material, pass through the stove of the part
Core pipe external diameter is homogeneous without the undergauge since the top of furnace core tube 13, so as to maintain between furnace core tube and heater away from
From shorter, it is possible to increase the efficiency of heating surface from heater.In addition, furnace core tube external diameter is also easy to be processed for the moment.
In addition, so-called undergauge pipe portion 13b, refers to connect with reducing diameter part 13a, have and contracted compared with upper portion 13c internal diameter
The pipe portion of uniform bore diameter behind footpath, it is initially towards lower section and the scope in the stove framework near the 14a of heater lower end.Contracting
Footpath pipe portion 13b external diameter matches with the internal diameter after the undergauge, undergauge to uniform diameter.In addition, in the present embodiment, contracting
The upper portion 13C and reducing diameter part 13a of footpath pipe portion 13b and furnace core tube are formed respectively, but can also be integrally formed.In addition, for
Undergauge pipe portion 13b external diameter, it is taper that can also make external diameter undergauge.
By making undergauge pipe portion 13b external diameter matchingly carry out undergauge with internal diameter, so that the thickness of pipe portion is thinning, energy
Thermal resistance is enough set to become big.As a result, compared with the undergauge pipe portion of furnace core tube 20, can reduce caused by heat transfer to stove frame
The radiating of body.On the other hand, by by undergauge pipe portion 13b external diameter undergauge, so as in the 1st heat-barrier material 15a and undergauge pipe portion
Space is produced between 13b（space）.The space is as shown in explanation in Fig. 3, because the heat of heater 14 is carried out via furnace core tube
Radiation, therefore heat is easy to scatter and disappear to stove framework 16.Therefore, in the present invention, the 2nd heat-barrier material is filled into the space segment
15b, it is suppressed that heat scatters and disappears.
Fill to above-mentioned space segment the 2nd heat-barrier material 15b, can be with fill it is heat-insulated to the 1st in stove framework 16
Material 15a identical materials.But the 2nd heat-barrier material 15b internal diameter D is preferably formed into, with furnace core tube 13 without the non-of undergauge
The outer diameter A of diameter shrinkage part compared to smaller, and for will not be due to heating when thermal expansion and the size that be contacted with undergauge pipe portion 13b.
In addition, the 2nd heat-barrier material 15b both can be with the 1st heat-barrier material 15a one construction or separation structure, the 1st every
Hot material 15a can also be the construction for being divided into multiple positions in itself.In addition, furnace core tube 13 is usually using isotropic graphite,
Bulk density is high, and its pyroconductivity is 200W/（m·K）The order of magnitude.On the other hand, the carbon heat-barrier material used in stove framework
Bulk density it is small, its pyroconductivity is in N2It is less than 1W/ in gas and Ar gas atmospheres（m·K）, it is the 1/200 of furnace core tube, pole
Its is small.
In fiber drawing furnace involved in the present invention, the one of the situation of Ar gases is used to the gas in stove framework as supply
Individual example, it can will reduce about 30% to obtain the stove electric power needed for 2200 DEG C of the central temperature of heater.In addition, even if
In supply to the gas use in stove framework and N2The situation of gas and Ar gas phases than pyroconductivity for 8 times or so of He gases
Under, as an example, about 10% can will be reduced in order to obtain the stove electric power needed for 2200 DEG C of the central temperature of heater.
Claims (2)
1. a kind of fibre drawing furnace, it has in stove framework：Furnace core tube；Heater, it is heated to the furnace core tube；With
And the 1st heat-barrier material, it surrounds the outside of the furnace core tube, and the fibre drawing furnace is used to glass base material for optical fiber being inserted in institute
State in furnace core tube and heat melting, draw out optical fiber,
The fibre drawing furnace is characterised by,
The furnace core tube has：Reducing diameter part, it is since the central portion of the heater, and internal diameter homogeneous towards lower end external diameter
Undergauge is taper；And undergauge pipe portion, it is in the lower section of the reducing diameter part, and external diameter has also carried out undergauge, in the undergauge pipe portion
The 2nd for suppression radiating is also configured with space segment between the 1st heat-barrier material in the caused stove framework
Heat-barrier material.
2. fibre drawing furnace according to claim 1, it is characterised in that
The internal diameter of 2nd heat-barrier material is smaller compared with the external diameter without the position of undergauge of the furnace core tube, and with not
The size that can be contacted due to thermal expansion when heating with the undergauge pipe portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013024070A JP6107193B2 (en) | 2013-02-12 | 2013-02-12 | Optical fiber drawing furnace |
| JP2013-024070 | 2013-02-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103979789A CN103979789A (en) | 2014-08-13 |
| CN103979789B true CN103979789B (en) | 2018-03-20 |
Family
ID=51271994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410049032.0A Active CN103979789B (en) | 2013-02-12 | 2014-02-12 | Fibre drawing furnace |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6107193B2 (en) |
| CN (1) | CN103979789B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105271707B (en) * | 2015-11-13 | 2019-01-04 | 成都中住光纤有限公司 | A kind of fibre drawing furnace furnace structure |
| CN106186663A (en) * | 2016-08-29 | 2016-12-07 | 中天科技光纤有限公司 | A kind of novel optical fiber fiber drawing furnace |
| CN108975677B (en) * | 2017-06-02 | 2021-04-06 | 中天科技精密材料有限公司 | Wire drawing furnace |
| KR102670459B1 (en) * | 2017-10-20 | 2024-05-30 | 코닝 인코포레이티드 | Device having a heat shield comprising a solid monolithic nose |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003335545A (en) * | 2002-03-15 | 2003-11-25 | Furukawa Electric Co Ltd:The | Method and apparatus for drawing optical fiber |
| JP2004224587A (en) * | 2003-01-20 | 2004-08-12 | Sumitomo Electric Ind Ltd | Drawing method and drawing apparatus for optical fiber preform |
| CN102863149A (en) * | 2011-07-08 | 2013-01-09 | 住友电气工业株式会社 | Fiber drawing device and drawing method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4374783B2 (en) * | 2001-01-30 | 2009-12-02 | 住友電気工業株式会社 | Optical fiber drawing method |
-
2013
- 2013-02-12 JP JP2013024070A patent/JP6107193B2/en active Active
-
2014
- 2014-02-12 CN CN201410049032.0A patent/CN103979789B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003335545A (en) * | 2002-03-15 | 2003-11-25 | Furukawa Electric Co Ltd:The | Method and apparatus for drawing optical fiber |
| JP2004224587A (en) * | 2003-01-20 | 2004-08-12 | Sumitomo Electric Ind Ltd | Drawing method and drawing apparatus for optical fiber preform |
| CN102863149A (en) * | 2011-07-08 | 2013-01-09 | 住友电气工业株式会社 | Fiber drawing device and drawing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103979789A (en) | 2014-08-13 |
| JP2014152082A (en) | 2014-08-25 |
| JP6107193B2 (en) | 2017-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103979789B (en) | Fibre drawing furnace | |
| CN109797273B (en) | Rod-shaped material gradient heat treatment device and heat treatment method | |
| JP7286970B2 (en) | SiC Single Crystal Growth Crucible, SiC Single Crystal Manufacturing Method, and SiC Single Crystal Manufacturing Apparatus | |
| KR20130108389A (en) | Energy-efficient high-temperature refining | |
| JPWO2005095680A1 (en) | Semiconductor single crystal manufacturing apparatus and graphite crucible | |
| WO2010075587A3 (en) | Heating and melting of materials by electric induction heating of susceptors | |
| CN103966657B (en) | Ingotting furnace for polycrystalline silicon and quasi single crystal silicon and application method for ingotting furnace | |
| CN102897995A (en) | Quartz tube, quartz rod continuous furnace | |
| KR20200110388A (en) | Convection pattern control method of silicon melt, silicon single crystal manufacturing method, and silicon single crystal pulling device | |
| JP2015074600A (en) | Method of manufacturing optical fiber | |
| CN105531406A (en) | Silicon single crystal puller | |
| WO2012020462A1 (en) | Electromagnetic casting apparatus for silicon | |
| US20080123715A1 (en) | Silicon Refining Installation | |
| CN111115636B (en) | Electromagnetic suspension coil and method for metallurgical-grade silicon electromagnetic suspension treatment | |
| CN104690389B (en) | A kind of method for welding preparing diamond-copper composite material | |
| CN102249534A (en) | Full diameter optical fiber preform rod induction fiber drawing furnace heating apparatus | |
| CN202430328U (en) | Heater used for thermal field of MCZ (magnetic-field-applied Czochralski method) monocrystal furnace | |
| WO2007094551A1 (en) | Heater having multi hot-zones, furnace having the heater for drawing down optical fiber preform into optical fiber, and method for drawing optical fiber using the same | |
| CN104762655A (en) | Combination heater used for czochralski crystal growing furnace hot zone | |
| CN102350488A (en) | Online heating device for continuous casting round bloom | |
| JP5686467B2 (en) | Substrate processing apparatus and semiconductor device manufacturing method | |
| JP6264058B2 (en) | Silicon melting method and apparatus, and silicon single crystal manufacturing apparatus equipped with the apparatus | |
| CN200992517Y (en) | Continuous melting furnace for drawing colored quartz glass pipe | |
| JP2012066970A (en) | Electromagnetic casting method of silicon ingot | |
| CN216898348U (en) | Zone melting furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |