CN203530137U - Telescopic sealing device for fiber drawing furnace - Google Patents
Telescopic sealing device for fiber drawing furnace Download PDFInfo
- Publication number
- CN203530137U CN203530137U CN201320691614.XU CN201320691614U CN203530137U CN 203530137 U CN203530137 U CN 203530137U CN 201320691614 U CN201320691614 U CN 201320691614U CN 203530137 U CN203530137 U CN 203530137U
- Authority
- CN
- China
- Prior art keywords
- sealing device
- drawing furnace
- telescopic sealing
- telescopic
- disc
- 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.)
- Expired - Lifetime
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 32
- 238000012681 fiber drawing Methods 0.000 title abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 239000000835 fiber Substances 0.000 claims abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 15
- 238000005491 wire drawing Methods 0.000 claims description 12
- 210000004907 gland Anatomy 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 210000002268 wool Anatomy 0.000 claims description 4
- 239000007789 gas Substances 0.000 abstract description 17
- 239000013307 optical fiber Substances 0.000 abstract description 8
- 238000007664 blowing Methods 0.000 abstract description 2
- 239000011261 inert gas Substances 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 5
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2205/00—Fibre drawing or extruding details
- C03B2205/60—Optical fibre draw furnaces
- C03B2205/80—Means for sealing the preform entry or upper end of the furnace
Landscapes
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
The utility model relates to a telescopic sealing device for a fiber drawing furnace. The telescopic sealing device comprises a drawing furnace body and a heating chamber. The telescopic sealing device is characterized in that a disc base is mounted at a furnace hole in the upper end of the heating chamber of the drawing furnace body, a heat-resistance flexible sealing gasket is mounted in the disc base, and a radial elastic telescopic device is configured on the periphery of the flexible sealing gasket. According to the telescopic sealing device for the fiber drawing furnace, the sealing diameter can be changed automatically and a less radial clearance or a zero clearance is maintained between an optical fiber preformed rod of which the outer diameter fluctuates and the sealing device during drawing and feeding; an inert gas blowing channel is further arranged at the upper end of the heating chamber to form an isolated gas ring, so that outside air can be further prevented from entering a furnace chamber, airflow stablility in the drawing furnace is ensured, drawing quality is ensured, and the technical problem of the difficult sealing of the optical fiber preformed rod of which outer diameter fluctuates greatly is solved. The telescopic sealing device has the advantages of simple and reasonable structure, high reliability, and convenience for use and large flexibility of radial seal, and the maximum fluctuation value of the outer diameter of the fiber optical preformed rod can reach 30mm.
Description
Technical field
The utility model relates to a kind of telescopic sealing device for fibre drawing furnace, and this device is specially adapted to the wire drawing of the preform that external diameter fluctuation is larger.
Background technology
Optical fiber is by preform thermoplastic wire drawing is formed in fibre drawing furnace.In drawing process; in fiber drawing furnace, temperature reaches about 2000 ℃, in order to protect the graphite heater material in fiber drawing furnace, need in fiber drawing furnace, keep rare gas element; conventionally pass into the mixed gas of argon gas and helium as shielding gas, need to control the outside air that flows into fiber drawing furnace simultaneously.Air enters into fiber drawing furnace when preventing preform drawing, need to tightness system be set at fiber drawing furnace upper end fire door, and the gap between tightness system and prefabricated rods is less, and sealing effectiveness is just better, and outside air enters just fewer.
Because the diameter of the preform for wire drawing is not identical, sometimes there is again larger fluctuation in simple optical fiber prefabricated rods external diameter, fire door all can reach good sealing effectiveness when guaranteeing every preform drawing, existing fiber drawing furnace tightness system is generally adopted in two ways: a kind of is at fiber drawing furnace fire door, to place the tightness system of different pore size, during the preform drawing of different diameter, use the tightness system in different size aperture, this structure has increased the manufacturing cost of air seal set on the one hand, in addition on the one hand, during each preform of changing different diameter, all must change tightness system, easily cause operational error, also to operation, cause a lot of inconvenience.Another kind is to adopt flexible barrier material, for example adopt graphite flake, the materials such as graphite carbon felt seal, and the external diameter of the aperture ratio prefabricated rods of flexible barrier material is little, in whole preform drawing process, flexible barrier material is close to prefabricated rods outer wall all the time, thereby reach good sealing effectiveness, yet, in this sealing method, flexible barrier material can effective sealing external diameter fluctuation range limited, can not be for the larger preform of seal outer diameter fluctuation.
Summary of the invention
Technical problem to be solved by this invention is to overcome the telescopic sealing device that deficiency that above-mentioned prior art exists provides a kind of fibre drawing furnace applicable to the larger preform of external diameter fluctuation, to guarantee the Wire Drawing quality of optical fiber.
The present invention is that the technical scheme that the problem of the above-mentioned proposition of solution adopts is:
Include wire drawing body of heater and heating chamber, it is characterized in that being installed on disc-shaped base at the upper end, heating chamber of wire drawing body of heater fire door, in disc-shaped base, be installed on heatproof flexible gasket, heatproof flexible gasket periphery configuration radial elastic retractor device.
Press such scheme, described disc-shaped base upper end disposes gland.
Press such scheme, described radial elastic retractor device is radial elastic expansion ring.
Press such scheme, described radial elastic expansion ring comprises the circular arc piece and the spring that acts on circular arc piece along circumferentially splicing.
Press such scheme, on the extrados of described circular arc piece, be installed on outwardly directed radial push rod, circumferential correspondence at disc-shaped base is offered radially limiting through hole, and radial push rod stretches out radially limiting through hole, is installed on the spring that holds each radial push rod on the top of radial push rod.
Press such scheme, described spring is spiral elastic ring or jag ring spring.
Press such scheme, described circular arc piece is 3 ~ 6, and every radian is identical, along circumferentially uniform and keep circumferential interval.
Press such scheme, described heatproof flexible gasket is silica wool gasket.
Press such scheme, below disc-shaped base, along heating chamber, be circumferentially provided with gas gas hole, gas gas hole is connected with shielding gas origin.
Press such scheme, described disc-shaped base, circular arc piece and gland are made by silica glass.
Beneficial effect of the present invention is: 1, by installing retractility tightness system at fiber drawing furnace heating upper end, chamber fire door, can make seal footpath automatic telescopic, make when drawn wire feeding, to remain less radius clearance or zero stand-off between the preform of external diameter fluctuation and tightness system, in heating upper end, chamber, rare gas element air blowing passage is set simultaneously, form isolation compression ring, further prevent that outside air from entering furnace chamber, guarantee the stable of wire drawing gas stream in the stove, thereby guarantee the quality of wire drawing, solved the technical barrier that the very large preform of external diameter fluctuation is difficult to sealing; 2, not only can effectively avoid the oxidation of graphite heater material in fiber drawing furnace heating chamber with effectively completely cutting off of outside air, the acceptable life of raising equipment, and can effectively stop overflowing of the interior shielding gas of fiber drawing furnace, save the consumption of the shielding gas in fiber drawing furnace; 3, structure arranges advantages of simple, and reliability is high, easy to use; 4, the retractility of radial seal is large, and the undulating quantity maximum of optical fiber prefabricating rod outside diameter can reach 30mm.
Accompanying drawing explanation
Fig. 1 is the sectional structure chart of an embodiment of the utility model.
Fig. 2 is the enlarged view of tightness system in Fig. 1.
Fig. 3 be in Fig. 2 tightness system overlook enlarged view.
Embodiment
Below in conjunction with Figure of description, further illustrate embodiment of the present utility model.
Include wire drawing body of heater 1 and heating chamber, in the upper end, heating chamber of wire drawing body of heater, fire door is installed on silica glass dish type base 2, disc-shaped base upper end is opened wide, bottom surface, lower end has through hole, through hole outside bottom surface arranges the annular stopper phase configuration that flange and upper end fire door are offered, and in the circumferential correspondence of disc-shaped base, offers radially limiting through hole, in disc-shaped base, be installed on heatproof flexible gasket 10, heatproof flexible gasket is silica wool gasket, heatproof flexible gasket periphery configuration radial elastic expansion ring, described radial elastic expansion ring comprises 6 circular arc pieces 3 that splice along circumferentially, every radian is identical, along circumferentially uniform and keep circumferential interval, on the extrados of circular arc piece, be installed on outwardly directed radial push rod, circular arc piece and radial push rod are made by silica glass, radial push rod stretches out the radially limiting through hole of disc-shaped base, on the top of radial push rod, be installed on the spring 4 that holds each radial push rod, described spring is spiral elastic ring.In disc-shaped base upper end, dispose silica glass gland 5, for the axial stop of heatproof flexible gasket and spacing.
When the utility model is used, the preform 9 that is connected to prolongation rod 11 is put into fiber drawing furnace and carry out clamping, the prolongation rod of preform rear end is connected with the chuck of fiber drawing furnace feed mechanism, by feed mechanism, preform is adjusted to the right place, the front end of preform enters fiber drawing furnace heating chamber through telescopic sealing device, and the heatproof flexible gasket of tightness system is close to preform; Rare gas element is transported to fiber drawing furnace heating top, chamber, so that rare gas element and preform meet, and be created in the mobile gas of gap location between fiber drawing furnace heating chamber and preform, forms isolation compression ring, further prevent that outside air from entering furnace chamber; By the front end of the softening preform of heating chamber heating, from softening inner cone end continuous drawing, go out the optical fiber of required diameter; In drawing process, feed mechanism slowly enters preform feeding heating chamber, until effective deposition tail end of preform is drawn into optical fiber; Extend excellent diameter less, at the weld of itself and prefabricated rods, install upper and lower silica glass wear ring 8,6, between upper and lower silica glass wear ring, install silica wool gasket 7, for the last tail end of prefabricated rods, enter the sealing behind heating chamber.
Claims (10)
1. the telescopic sealing device for fibre drawing furnace, include wire drawing body of heater and heating chamber, it is characterized in that being installed on disc-shaped base at the upper end, heating chamber of wire drawing body of heater fire door, in disc-shaped base, be installed on heatproof flexible gasket, heatproof flexible gasket periphery configuration radial elastic retractor device.
2. by the telescopic sealing device for fibre drawing furnace claimed in claim 1, the disc-shaped base upper end described in institute is characterized in that disposes gland.
3. by the telescopic sealing device for fibre drawing furnace described in claim 1 or 2, the radial elastic retractor device described in institute is characterized in that is radial elastic expansion ring.
4. by the telescopic sealing device for fibre drawing furnace claimed in claim 3, institute is characterized in that described radial elastic expansion ring comprises along the circular arc piece of circumferentially splicing and acts on the spring of circular arc piece.
5. by the telescopic sealing device for fibre drawing furnace claimed in claim 4, it is characterized in that on the extrados of described circular arc piece being installed on outwardly directed radial push rod, circumferential correspondence at disc-shaped base is offered radially limiting through hole, radial push rod stretches out radially limiting through hole, is installed on the spring that holds each radial push rod on the top of radial push rod.
6. by the telescopic sealing device for fibre drawing furnace claimed in claim 5, the spring described in institute is characterized in that is spiral elastic ring or jag ring spring.
7. by the telescopic sealing device for fibre drawing furnace described in claim 4 or 5, institute is characterized in that described circular arc piece is 3 ~ 6, and every radian is identical, along circumferential uniform and keep circumferential interval.
8. by the telescopic sealing device for fibre drawing furnace described in claim 1 or 2, the heatproof flexible gasket described in institute is characterized in that is silica wool gasket.
9. by the telescopic sealing device for fibre drawing furnace described in claim 1 or 2, it is characterized in that is circumferentially provided with gas gas hole along heating chamber below disc-shaped base, and gas gas hole is connected with shielding gas origin.
10. by the telescopic sealing device for fibre drawing furnace claimed in claim 4, disc-shaped base, circular arc piece and gland described in institute is characterized in that are made by silica glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320691614.XU CN203530137U (en) | 2013-11-05 | 2013-11-05 | Telescopic sealing device for fiber drawing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320691614.XU CN203530137U (en) | 2013-11-05 | 2013-11-05 | Telescopic sealing device for fiber drawing furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203530137U true CN203530137U (en) | 2014-04-09 |
Family
ID=50416371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320691614.XU Expired - Lifetime CN203530137U (en) | 2013-11-05 | 2013-11-05 | Telescopic sealing device for fiber drawing furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203530137U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106219963A (en) * | 2016-08-29 | 2016-12-14 | 中天科技光纤有限公司 | A kind of fiber drawing furnace furnace mouth seal device and control method thereof |
| WO2018040575A1 (en) * | 2016-08-29 | 2018-03-08 | 中天科技光纤有限公司 | Optical fibre drawing furnace |
| CN110950529A (en) * | 2019-11-07 | 2020-04-03 | 通鼎互联信息股份有限公司 | Elastic air sealing device of wire drawing furnace, air sealing structure and air sealing method |
| CN111479786A (en) * | 2017-12-20 | 2020-07-31 | 贺利氏石英北美有限责任公司 | Variable diameter seal for optical preform furnace |
| CN113402163A (en) * | 2021-07-26 | 2021-09-17 | 郭俊滔 | Airflow stabilizing structure of heating furnace for optical fiber drawing |
| CN113415988A (en) * | 2021-08-23 | 2021-09-21 | 南通裕荣电子商务有限公司 | Wire drawing furnace for heating and melting glass base material for optical fiber |
| CN114488448A (en) * | 2022-03-08 | 2022-05-13 | 南方科技大学 | Multi-fiber packaging device and multi-fiber packaging method |
| CN114863610A (en) * | 2022-04-24 | 2022-08-05 | 中电万维信息技术有限责任公司 | Intelligent recognition system based on neural network model and use method thereof |
| CN116102251A (en) * | 2023-02-17 | 2023-05-12 | 南京迈通光电科技有限公司 | Sealing structure of optical fiber drawing furnace |
-
2013
- 2013-11-05 CN CN201320691614.XU patent/CN203530137U/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018040575A1 (en) * | 2016-08-29 | 2018-03-08 | 中天科技光纤有限公司 | Optical fibre drawing furnace |
| CN106219963B (en) * | 2016-08-29 | 2018-12-28 | 中天科技光纤有限公司 | A kind of fiber drawing furnace furnace mouth seal device and its control method |
| CN106219963A (en) * | 2016-08-29 | 2016-12-14 | 中天科技光纤有限公司 | A kind of fiber drawing furnace furnace mouth seal device and control method thereof |
| US11434163B2 (en) | 2017-12-20 | 2022-09-06 | Heraeus Quartz North America Llc | Variable diameter seal for optical preform furnace |
| CN111479786A (en) * | 2017-12-20 | 2020-07-31 | 贺利氏石英北美有限责任公司 | Variable diameter seal for optical preform furnace |
| CN110950529A (en) * | 2019-11-07 | 2020-04-03 | 通鼎互联信息股份有限公司 | Elastic air sealing device of wire drawing furnace, air sealing structure and air sealing method |
| CN110950529B (en) * | 2019-11-07 | 2022-05-03 | 通鼎互联信息股份有限公司 | Elastic air sealing device of wire drawing furnace, air sealing structure and air sealing method |
| CN113402163A (en) * | 2021-07-26 | 2021-09-17 | 郭俊滔 | Airflow stabilizing structure of heating furnace for optical fiber drawing |
| CN113402163B (en) * | 2021-07-26 | 2023-08-08 | 郭俊滔 | Heating furnace airflow stabilizing structure for optical fiber drawing |
| CN113415988A (en) * | 2021-08-23 | 2021-09-21 | 南通裕荣电子商务有限公司 | Wire drawing furnace for heating and melting glass base material for optical fiber |
| CN113415988B (en) * | 2021-08-23 | 2021-11-16 | 南通裕荣电子商务有限公司 | Wire drawing furnace for heating and melting glass base material for optical fiber |
| CN114488448A (en) * | 2022-03-08 | 2022-05-13 | 南方科技大学 | Multi-fiber packaging device and multi-fiber packaging method |
| CN114488448B (en) * | 2022-03-08 | 2023-12-01 | 南方科技大学 | Multi-fiber packaging device and multi-fiber packaging method |
| CN114863610A (en) * | 2022-04-24 | 2022-08-05 | 中电万维信息技术有限责任公司 | Intelligent recognition system based on neural network model and use method thereof |
| CN116102251A (en) * | 2023-02-17 | 2023-05-12 | 南京迈通光电科技有限公司 | Sealing structure of optical fiber drawing furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140409 |