CN104071977A - Fiber drawing furnace - Google Patents
Fiber drawing furnace Download PDFInfo
- Publication number
- CN104071977A CN104071977A CN201410341558.6A CN201410341558A CN104071977A CN 104071977 A CN104071977 A CN 104071977A CN 201410341558 A CN201410341558 A CN 201410341558A CN 104071977 A CN104071977 A CN 104071977A
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- fibre
- operated device
- gas operated
- drawing furnace
- optical fiber
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Abstract
The invention discloses a fiber drawing furnace. The fiber drawing furnace comprises a furnace body, a thermal insulator, a heating body and a central tube and is characterized in that the thermal insulator is arranged in the furnace body and wraps the whole heating body; the heating body is positioned at the periphery of the central tube; a sealing device is arranged at the top of the furnace body; an optical fiber preform penetrates the sealing device to enter the central tube; an optical fiber drawing outlet is formed in the bottom of the furnace body; a gas guiding pipe is connected to a position below the optical fiber drawing outlet; optical fiber drawing wires are pulled out of the gas guiding pipe. According to the invention, the gas guiding pipe is arranged at the optical fiber drawing outlet to play a flow stabilizing role, so that bending caused by horizontal swinging of optical fiber filaments due to variation of airflow is effectively avoided, change of the diameters of the optical fiber filaments is prevented, and the strength of the optical fibers is guaranteed.
Description
Technical field
The present invention relates to optic fibre manufacturing technology field, relate in particular to a kind of fibre drawing furnace.
Background technology
Fibre drawing furnace is one of most important equipment in fiber manufacturing operation.During wire drawing, the interior temperature of fiber drawing furnace is over 2000 degrees Celsius; in fiber drawing furnace, there is a large amount of graphite members, therefore when high temperature wire drawing, need to have sufficient rare gas element to protect fiber drawing furnace, in case block gas enters fiber drawing furnace; cause the oxidation of graphite member, thereby affect the quality of wire drawing optical fiber.This major effect shows following aspect, component materials in fiber drawing furnace adopts high purity graphite conventionally, when wire drawing, in stove, temperature is higher, extraneous air is at high temperature oxidized graphite after entering fiber drawing furnace, affect the work-ing life of graphite member, the dust simultaneously producing after graphite oxidation can stick to prefabricated rods and melt in part, cause the fiber strength of making to decline, even affect fade performance, therefore need fiber drawing furnace to there is good resistance to air loss, and pass into rare gas element (as argon gas, helium etc.), the atmosphere of inert gases that keeps certain malleation in stove, thereby reach good provide protection.
The rare gas element that is usually used at present fiber drawing furnace has helium, argon gas, nitrogen.Rare gas element enters the fiber drawing furnace under the condition of high temperature, then discharges from fiber drawing furnace outlet, remains pressure-fired in fiber drawing furnace.The problem running into is at present, rare gas element enters in fiber drawing furnace easily at the inner turbulent flow that forms of stove, or sinuous flow, thereby affected the temperature variation of prefabricated rods thawing and even optical fiber forming area, cause fibre-optical drawing diameter thickness out to change greatly, the homogeneity of fibre diameter is not high, for follow-up processing causes difficulty, when fluctuation more easily causes follow-up optical fiber to peg graft such as fibre cladding, can not complete smoothly grafting etc., how controlling aborning fibre cladding diameter fluctuation is just becoming a lower level important topic that industry solves.
Summary of the invention
The technical assignment of technical problem to be solved by this invention and proposition is that prior art is improved, a kind of fibre drawing furnace is provided, the unstable that solves the inert gas flow in current technology causes fibre diameter to change and fiber strength decline, affects the problem of fibre-optical drawing quality.
For solving above technical problem, technical scheme of the present invention is:
A kind of fibre drawing furnace, comprise body of heater, thermal insulator, heating member, pipe core, it is characterized in that, described thermal insulator device is in body of heater, and thermal insulator wraps whole heating member, heating member is positioned at the periphery of pipe core, the top arrangement of body of heater has tightness system, and preform enters in pipe core through tightness system, and the bottom of body of heater is fibre-optical drawing outlet, below fibre-optical drawing outlet, connect airway, drawing optical fibers is pulled out from airway.The present invention is provided with gas operated device in traditional fibre drawing furnace exit, optical fiber is pulled out from gas operated device, effect due to gas operated device, rare gas element in drawing optical fibers furnace body is derived from gas operated device, rare gas element is along the downward streamlined flow of gas operated device, make gas flowfield steady, thereby the steady air current of giving vent to anger by control makes the air-flow of body of heater inside keep steady state, it is constant that temperature field keeps, thereby make the optical fiber fibril being drawn into can, because air turbulence causes diameter fluctuation, not guarantee that fibre diameter is even.
Further, the internal diameter of described gas operated device is round, and circular configuration is that flow field is more stable.
Further, the internal diameter of described gas operated device is pipe or conical tube.
Further, described gas operated device internal diameter is 1～20mm.By test, find that gas operated device internal diameter obviously reduces for the stabilization of air-flow over 20mm, if gas operated device internal diameter is less than 1mm, easily causes optical fiber easily to clip gas operated device inwall, thereby affects the intensity of optical fiber.
Further, the length of described gas operated device is 10～1000mm.During according to actual production, the diameter of drawing optical fiber and optical fiber material adopt suitable gas operated device internal diameter and length.
Further, described gas operated device is to be combined by two or more lobe bodys.When preform melts gradually, in its bottom, can accumulate the frit of melted state, it hangs down naturally, just forms optical fiber.At initial its diameter of fusing stub bar forming, cannot pass through gas operated device more greatly, can cause the obstruction of gas operated device, affect the normal operation of whole fibre drawing furnace, therefore gas operated device is set to amalgamation assembly type, when just starting heating optical fiber preform, two or more lobe bodys of gas operated device are separated position, distance separately needs enough fusing stub bars to pass through, fusing stub bar by behind gas operated device position again by two or more lobe body amalgamation of gas operated device, make gas operated device start normal work, effectively prevent that variations in flow from causing detrimentally affect to fibre-optical drawing.
Further, described bottom of furnace body is provided with chute, the lobe body device of gas operated device on chute along chute slip amalgamation.Adopt this kind of mode can separate easily or two or more lobe bodys of amalgamation gas operated device, only need slide along chute, simple and quick.
Further, described pipe core inside is useful on the muffle tube of water conservancy diversion at fibre-optical drawing exit returning apparatus.Make the gas flowfield in pipe core steady, avoid drawing optical fibers diameter to change, ensure fiber strength.
Compared with prior art, the invention has the advantages that:
Fibre drawing furnace of the present invention is provided with gas operated device in fibre-optical drawing outlet, plays current stabilization effect, effectively avoids air turbulence and causes fibre diameter fluctuation, ensures that fibre diameter is even;
Gas operated device of the present invention adopts two-piece construction, simple in structure, easy to use, can effectively avoid gas operated device to be melted stub bar and stop up, and guarantees the normal effectiveness of gas operated device.
Fibre drawing furnace of the present invention is simple in structure, low cost of manufacture, and suitability is strong, easy to make, and economic benefit is high.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the cross-sectional structure schematic diagram of airway;
Fig. 3 is the another kind of example structure schematic diagram of airway.
Embodiment
Below the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention discloses a kind of fibre drawing furnace, makes in fiber drawing furnace stove and exit steady air current, ensures drawing optical fibers diameter and intensity stabilization, ensures that optical fiber fibril there will not be bending.
As shown in Figure 1, a kind of fibre drawing furnace, comprise body of heater 1, thermal insulator 2, heating member 3, pipe core 4, thermal insulator 2 devices are in body of heater 1, and thermal insulator 2 wraps whole heating member 3, heating member 3 is positioned at the periphery of pipe core 4, the top arrangement of body of heater 1 has tightness system 5, and preform 7 enters in pipe core 4 through tightness system 5, and the bottom of body of heater 1 is fibre-optical drawing outlet 6, below fibre-optical drawing outlet 6, connect airway 8, drawing optical fibers is pulled out from gas operated device 8.Utilize gas operated device 8 to make the flow field change of rare gas element steady, prevent that optical fiber fibril from exporting 6 places because rare gas element is discharged the disorderly fibre diameter fluctuation that causes at fibre-optical drawing.
As shown in Figure 2, airway 8 is comprised of lobe body 9 amalgamations of two of left and right, and body of heater 1 bottom is provided with chute, and the left and right lobe body 9 of airway 8 installs on chute along chute slip amalgamation.On the Mosaic face of lobe body 9, be provided with raised line 10 and groove 11, raised line 10 is snapped in groove 11 and makes two lobe bodys 9 piece together complete airway.Airway 8 internal diameters are 1～20mm, and the length of airway 8 is 10～1000mm.
As shown in Figure 3, airway 8 is comprised of three lobe body 9 amalgamations, is provided with chute equally in body of heater 1 bottom, and lobe body 9 installs on chute along chute slip amalgamation.
Body of heater 1 inside exports 6 place's returning apparatus at fibre-optical drawing muffle tube 12, the funnel structure that muffle tube 12 is big up and small down, the rare gas element that makes to flow to fibre-optical drawing outlet 6 collect and variations in flow steady, the diameter of avoiding causing optical fiber changes and the decline of fiber strength.
Below be only the preferred embodiment of the present invention, it should be pointed out that above-mentioned preferred implementation should not be considered as limitation of the present invention, protection scope of the present invention should be as the criterion with claim limited range.For those skilled in the art, without departing from the spirit and scope of the present invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1. a fibre drawing furnace, comprise body of heater (1), thermal insulator (2), heating member (3), pipe core (4), it is characterized in that, described thermal insulator (2) device is in body of heater (1), thermal insulator (2) wraps whole heating member (3), heating member (3) is positioned at the periphery of pipe core (4), the top arrangement of body of heater (1) has tightness system (5), preform (7) enters in pipe core (4) through tightness system (5), the bottom of body of heater (1) is fibre-optical drawing outlet (6), below in fibre-optical drawing outlet (6) connects gas operated device (8), drawing optical fibers is pulled out from gas operated device (8).
2. fibre drawing furnace according to claim 1, is characterized in that, the internal diameter of described gas operated device (8) is round.
3. fibre drawing furnace according to claim 2, is characterized in that, the internal diameter of described gas operated device (8) is pipe or conical tube.
4. fibre drawing furnace according to claim 3, is characterized in that, described gas operated device (8) internal diameter is 1～20mm.
5. fibre drawing furnace according to claim 4, is characterized in that, the length of described gas operated device (8) is 10～1000mm.
6. fibre drawing furnace according to claim 5, is characterized in that, described gas operated device (8) is to be combined by two or more lobe bodys (9).
7. fibre drawing furnace according to claim 6, is characterized in that, described body of heater (1) bottom is provided with chute, and the lobe body (9) of gas operated device (8) installs on chute along chute slip amalgamation.
8. fibre drawing furnace according to claim 1, is characterized in that, described pipe core (4) is inner locates in fibre-optical drawing outlet (6) muffle tube (12) that returning apparatus is useful on water conservancy diversion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410341558.6A CN104071977A (en) | 2014-07-17 | 2014-07-17 | Fiber drawing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410341558.6A CN104071977A (en) | 2014-07-17 | 2014-07-17 | Fiber drawing furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104071977A true CN104071977A (en) | 2014-10-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410341558.6A Pending CN104071977A (en) | 2014-07-17 | 2014-07-17 | Fiber drawing furnace |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104761138A (en) * | 2015-03-16 | 2015-07-08 | 江苏通鼎光棒有限公司 | Apparatus and method used in VAD and OVA loosen body sintering |
| CN105271706A (en) * | 2015-11-13 | 2016-01-27 | 成都中住光纤有限公司 | High-pressure-argon optical fiber drawing furnace |
| CN108529870A (en) * | 2017-03-01 | 2018-09-14 | 信越化学工业株式会社 | The manufacturing method and manufacturing device of wire drawing optical fiber base material |
| CN110577357A (en) * | 2018-06-11 | 2019-12-17 | 住友电气工业株式会社 | Method for drawing optical fiber |
| CN110845137A (en) * | 2019-12-16 | 2020-02-28 | 江苏亨通光纤科技有限公司 | Sealing structure of wire drawing furnace and annealing furnace and wire drawing device |
| CN112624601A (en) * | 2020-12-04 | 2021-04-09 | 飞秒光电科技(西安)有限公司 | Preparation method and preparation device for optical communication cylindrical lens wire diameter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5637130A (en) * | 1993-07-13 | 1997-06-10 | Sumitomo Electric Industries, Inc. | Method and furnace for drawing optical fibers |
| CN2568651Y (en) * | 2002-09-23 | 2003-08-27 | 江苏法尔胜光子有限公司 | Device for controlling airflow stabilizing of optical fiber legging procedue |
| CN103304135A (en) * | 2013-07-05 | 2013-09-18 | 江苏法尔胜光子有限公司 | Optical fiber drawing method for large-diameter optical fiber preform rod |
| CN204039254U (en) * | 2014-07-17 | 2014-12-24 | 成都中住光纤有限公司 | A kind of fibre drawing furnace |
-
2014
- 2014-07-17 CN CN201410341558.6A patent/CN104071977A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5637130A (en) * | 1993-07-13 | 1997-06-10 | Sumitomo Electric Industries, Inc. | Method and furnace for drawing optical fibers |
| CN2568651Y (en) * | 2002-09-23 | 2003-08-27 | 江苏法尔胜光子有限公司 | Device for controlling airflow stabilizing of optical fiber legging procedue |
| CN103304135A (en) * | 2013-07-05 | 2013-09-18 | 江苏法尔胜光子有限公司 | Optical fiber drawing method for large-diameter optical fiber preform rod |
| CN204039254U (en) * | 2014-07-17 | 2014-12-24 | 成都中住光纤有限公司 | A kind of fibre drawing furnace |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104761138A (en) * | 2015-03-16 | 2015-07-08 | 江苏通鼎光棒有限公司 | Apparatus and method used in VAD and OVA loosen body sintering |
| CN105271706A (en) * | 2015-11-13 | 2016-01-27 | 成都中住光纤有限公司 | High-pressure-argon optical fiber drawing furnace |
| CN105271706B (en) * | 2015-11-13 | 2018-07-06 | 成都中住光纤有限公司 | A kind of high pressure argon gas fibre drawing furnace |
| CN108529870A (en) * | 2017-03-01 | 2018-09-14 | 信越化学工业株式会社 | The manufacturing method and manufacturing device of wire drawing optical fiber base material |
| US11384006B2 (en) | 2017-03-01 | 2022-07-12 | Shin-Etsu Chemical Co., Ltd. | Wire-drawing optical fiber base material manufacturing method and manufacturing apparatus |
| CN108529870B (en) * | 2017-03-01 | 2022-10-21 | 信越化学工业株式会社 | Method and apparatus for manufacturing optical fiber base material for drawing |
| CN110577357A (en) * | 2018-06-11 | 2019-12-17 | 住友电气工业株式会社 | Method for drawing optical fiber |
| CN110577357B (en) * | 2018-06-11 | 2023-03-03 | 住友电气工业株式会社 | Method for drawing optical fiber |
| CN110845137A (en) * | 2019-12-16 | 2020-02-28 | 江苏亨通光纤科技有限公司 | Sealing structure of wire drawing furnace and annealing furnace and wire drawing device |
| CN112624601A (en) * | 2020-12-04 | 2021-04-09 | 飞秒光电科技(西安)有限公司 | Preparation method and preparation device for optical communication cylindrical lens wire diameter |
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Application publication date: 20141001 |