CN1206696A - Top gaseous diffuser of the deivce for drawing optical fiber from optical fiber prefabricated bar - Google Patents
Top gaseous diffuser of the deivce for drawing optical fiber from optical fiber prefabricated bar Download PDFInfo
- Publication number
- CN1206696A CN1206696A CN 98116362 CN98116362A CN1206696A CN 1206696 A CN1206696 A CN 1206696A CN 98116362 CN98116362 CN 98116362 CN 98116362 A CN98116362 A CN 98116362A CN 1206696 A CN1206696 A CN 1206696A
- Authority
- CN
- China
- Prior art keywords
- wire drawing
- scatterer
- drawing chamber
- optical fiber
- opening
- 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.)
- Pending
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
- C03B37/029—Furnaces therefor
-
- 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
-
- 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
- C03B2205/81—Means for sealing the preform entry or upper end of the furnace using gas
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
An optical fibre drawing apparatus using a fibre optic preformer comprises a fibrillation chamber and a heater. The upper end of this fibrillation chamber is fitted with a device for the diffusion for holding an inert gas atmosphere in the fibrillation chamber. The diffusion device is essentially coaxial to the preformer and the preformer is at least partially arranged in the diffusion device. The diffusion device incorporates at least one means for injecting the inert gas in a direction perpendicular to the vertical axis, terminating in an opening. The speed of the gas flow to the fibrillation chamber crossing the sections of the opening is less than 6 m/s.
Description
The present invention relates to a kind of device, particularly relate to wire-drawing frame at top equipment gas diffuser by the optical fiber prefabricated bar pulling optical fiber.
Usually, the device by the optical fiber prefabricated bar pulling optical fiber comprises:
A wire drawing chamber, in this wire drawing chamber, described prefabricated rods is installed in vertical in essence axial location, and can be along described axis direction displacement; With
At least one well heater, this well heater are used at least a portion of described wire drawing chamber is heated to wire-drawing temperature;
The top of described wire drawing chamber can be sealed by a tightness system at least selectively;
The top of described wire drawing chamber is equipped with a kind of device at least, is a kind of scatterer in general, in order to a kind of rare gas element is diffused in the described wire drawing chamber, thereby keeps a kind of atmosphere of rare gas element in described wire drawing chamber.For example, one of this device is described in Japanese patent application JP-A-01.018.934 and JP-A-62.176.938 to some extent.
In these devices, described dispersion device may be coaxial in essence with described prefabricated rods, and described prefabricated rods when mounted, and having a part at least is in dispersion device.Described dispersion device generally comprises at least one injector, in order to spray described gas; The end of described injector is an opening, and through this opening, rare gas element is along being parallel to or entering the wire drawing chamber perpendicular to the prefabricated rods axis direction.In principle, the existence of rare gas element can prevent that the wire drawing chamber is damaged.The wire drawing chamber is comprising a graphite furnace in typical case, and this stove generally is by inductance (induction) heating.
In any case, still there is some passage, make air can invade the wire drawing chamber, and cause making undesirable substandard products material, for example there is tiny carbon black particle.These particles generally are deposited on the bottom of device, but because rare gas element does not deposit the disturbance of system, this disturbance forms turbulent flow when entering the wire drawing chamber by gas and causes.Observations shows, uses the made fibre-optic physical strength deficiency of drawing process of this device.
Like this, the problem of proposition is how to improve rare gas element and flow into the air-flow of wire drawing chamber from dispersion device, so that reduce the turbulent flow of described air-flow in great scope.Another problem that produces is, improves the fibre-optic physical strength that is drawn by prefabricated rods, particularly reduces the frequency of fibercuts in winding working procedure, and this winding working procedure is to be right after after the operation of pulling optical fiber preform.
One of the object of the invention is to provide a kind of wire-drawing frame, this device solves the problem that is proposed, wherein, it has improved the air-flow that enters the wire drawing chamber, thereby,, better than the made fibre-optic physical strength of original drawing process with the made fibre-optic physical strength of this device.
For this purpose, the invention provides a kind of device from the optical fiber prefabricated bar pulling optical fiber, this device comprises:
A wire drawing chamber, in this wire drawing chamber, described prefabricated rods is installed in vertical in essence axis device, and can be along described axis direction displacement; With
At least one well heater, this well heater is used at least a portion with described wire drawing chamber, is heated to wire-drawing temperature;
The top of wire drawing chamber is equipped with scatterer, is used for rare gas element is diffused to described wire drawing chamber, thereby keeps a kind of atmosphere of rare gas element in described wire drawing chamber; Described scatterer is coaxial with described prefabricated rods in essence; And the installation of described prefabricated rods should make it have a part at least in scatterer; Described scatterer comprises at least one injector, and in order to described rare gas element is sprayed along the direction perpendicular to described axis, its end is an opening;
Wherein, the flow velocity of described rare gas element in the described wire drawing of the long-pending inflow of described opening section chamber is preferably less than 3m/s less than 6 meter per seconds (m/s).
Entering the gas of described wire drawing chamber, can be several noble gas mixtures.In this case, these rare gas elementes generally are to mix before entering the wire drawing chamber, form the turbulent risk so that reduce to greatest extent in described wire drawing chamber.
Further feature of the present invention and advantage can be from following two embodiment to the dispersion device that a kind of wire-drawing frame of the present invention adopted, to recognize in the graphic extension that also not only is confined to this.
In following figure:
Fig. 1 is the synoptic diagram at wire-drawing frame top, and this device comprises scatterer of the present invention, and this figure is in order to place context to this scatterer;
Fig. 2 is the following view of first embodiment of scatterer, and this scatterer has six grooves, and each groove has the central opening of square-section;
Fig. 3 is the sectional view of scatterer shown in Figure 2; With
Fig. 4 is the sectional view of scatterer second embodiment, and this scatterer is different with scatterer shown in Figure 3 with Fig. 2, and this scatterer has 12 grooves, and each groove all has the central opening of square-section.
In all figure, components identical is all used identical numerical reference.
Figure 1 shows that the part of wire-drawing frame 1 of the present invention, the optical fiber prefabricated bar 2 that this wire-drawing frame is used for making with transparent material is drawn into photoconductive fiber.Wire-drawing frame has a round shape wire drawing chamber 3, has described the formation of its top 3A among the figure, and a hole is arranged at this top, is positioned on the direct of travel of described prefabricated rods, in order to hold mobile prefabricated rods.Wire-drawing frame also comprises tightness system, the most handy in this case gasket 5, for example a kind of pad made from graphite.Gasket 5 usefulness are positioned at holder 6 clampings of roof 7, and this roof is positioned on the wire drawing chamber 3.Wire drawing chamber 3 has suitable well heater 10, just as is known to the person skilled in the art, this well heater is the temperature that is used to improve in the wire-drawing frame, at least reach the wire-drawing temperature of the transparent material that constitutes prefabricated rods 2, thereby along being vertical X-direction when moving in essence, be drawn into photoconductive fiber in prefabricated rods.The displacement of prefabricated rods generally is that for example the wire drawing axle is controlled (not drawing the wire drawing axle among the figure) by the mandrel that prefabricated rods is installed.
Rare gas element is sent into wire-drawing frame 3 through scatterer 9, and this scatterer is made up of an injector at least.According to scatterer of the present invention, promptly injector can make the inflow velocity that flows into the rare gas element of wire drawing chamber through described injector central opening cross section, less than 6 meter per seconds (m/s), is preferably less than 3m/s.
Particularly, in device of the present invention, scatterer is installed in essence near below the described tightness system, as shown in Figure 1, scatterer 9 is clamped near below the gasket 5, the sealing pad is clamped by the holder 6 that is contained in securely on the roof 7, and this roof 7 itself is contained on the wire drawing chamber 3 securely.Roof 7 combines with scatterer 9, helps to form therein gas channel, and each gas channel comprises: groove 11, this groove have three walls, originate in scatterer 9; With the 4th wall, this 4th wall is made of the part of roof 7.
In an embodiment of apparatus of the present invention, described device comprises at least two injectors, is more preferably 2 to 20 injectors, preferably 6 to 16 injectors.In this embodiment, preferably configuration as follows of described injector: the opening 11D of each groove 11 is symmetrical in described axis centre.Like this, scatterer 9 have at least an injector (Fig. 2 is six among Fig. 3, is 12 among Fig. 4) such as groove 11 (seeing Fig. 2,3 and 4) at the periphery of scatterer through inlet mouth 11c and air chamber 8 UNICOMs, with in middle the heart channel of Hang-Shaoyin opening 11D and air chamber 8 UNICOMs, this opening 11D can be rectangle.
In another embodiment of apparatus of the present invention, can be independent of the foregoing description selectively, at least one, preferably all injector comprises at least one gas mouth 11A and 11B, this gas mouth disposes along being essentially radial direction with respect to described axial line, with opening 11D and inlet mouth 11C UNICOM.
Scatterer is made with the suitable material known to any those skilled in the art, for example stainless steel.
The opening 11D of groove 11 generally disposes in the X-axis line by rotational symmetry.In addition, the opening 11D of groove 11 always is positioned near the prefabricated rods place." approaching " speech generally is meant such situation, and for example less than 10mm to 15mm, at this moment the diameter of optical fiber prefabricated bar is 40mm to 100mm to central opening apart from the distance of optical fiber prefabricated bar; In other words, the difference of scatterer interior diameter and optical fiber prefabricated bar 2 outside diameters is less than or equal to 30mm.Just as is known to the person skilled in the art, the size of wire-drawing frame will be adapted to the optical fiber prefabricated bar in order to pulling optical fiber, and like this, the opening 11D of scatterer 9 is near prefabricated rods.For example, the interior diameter 80mm of scatterer is used for the prefabricated rods that external diameter is 60mm to 70mm (perhaps internal diameter is that the scatterer of 50mm is used for the prefabricated rods that external diameter is 40mm).
Figure 2 shows that the following view of scatterer 9, this scatterer has six grooves 11, and each groove all has a rectangular aperture 11D, and Fig. 3 is the sectional view of same scatterer 9 shown in Figure 2.Groove 11 has its radial component 11A, and this part is to extend by being essentially vertical part 11B, and 11B itself then extends from the inlet mouth 11C with air chamber 8 UNICOMs.With the described method of example, opening 11C and 11D can adopt the same shape of cutting.
Figure 4 shows that the sectional view of 9 times views of another scatterer, this scatterer has 12 grooves 11, and its each opening 11D is rectangle.
Compare with scatterer shown in Figure 3 with Fig. 2, the groove 11 of scatterer shown in Figure 4, and the opening 11D of particularly described groove 11 all has identical in essence size (shown in Fig. 2,3 and 4), but they also may have different in essence sizes.Total cross-section from given central opening, be easy to the adjustments of gas flow, thereby make the gas velocity that enters the wire drawing chamber through this cross section less than 6m/s, be preferably less than 3m/s, given speed is to be got divided by described central opening total sectional area (being each section area sum) calculates by general gas flow.
Claims (10)
1. device by the optical fiber prefabricated bar pulling optical fiber, this device comprises:
A wire drawing chamber, in this wire drawing chamber, described prefabricated rods is installed in vertical in essence axial location, and can be along described axis direction displacement; With
At least one well heater, this well heater are used at least a portion of described wire drawing chamber is heated to wire-drawing temperature;
The top of wire drawing chamber is equipped with scatterer, is used for rare gas element is diffused to described wire drawing chamber, thereby keeps a kind of atmosphere of rare gas element in described wire drawing chamber; Described scatterer is coaxial with described prefabricated rods in essence; And the installation of described prefabricated rods should make it have a part at least in scatterer; Described scatterer comprises at least one injector, and in order to described rare gas element is sprayed along the direction perpendicular to described axis, its end is an opening,
Wherein, described rare gas element flows into flow velocity in the described wire drawing chamber less than 6m/s through described opening section.
2. device as claimed in claim 1, wherein, described rare gas element flows into flow velocity in the described wire drawing chamber less than 3m/s through described opening section.
3. device as claimed in claim 1, wherein, described device also comprises tightness system.
4. device as claimed in claim 3, wherein, described scatterer be installed in be right after in essence described tightness system below.
5. device as claimed in claim 1, wherein, at least one injector has at least one gas circulation device, is installed in essence along the radial direction of described axle, with described opening and the mutual UNICOM of inlet mouth.
6. device as claimed in claim 1, wherein, each injector has at least one gas circulation device, is installed in essence along the radial direction of described axle, with described opening and the mutual UNICOM of inlet mouth.
7. device as claimed in claim 1, this device has at least two injectors.
8. device as claimed in claim 7, this device have 2 to 20 injectors.
9. device as claimed in claim 7, this device have 6 to 16 injectors.
10. device as claimed in claim 7, wherein, the configuration of described injector makes each opening be positioned at the position that described axle is centrosymmetric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98116362 CN1206696A (en) | 1997-07-24 | 1998-07-24 | Top gaseous diffuser of the deivce for drawing optical fiber from optical fiber prefabricated bar |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9709415 | 1997-07-24 | ||
| CN 98116362 CN1206696A (en) | 1997-07-24 | 1998-07-24 | Top gaseous diffuser of the deivce for drawing optical fiber from optical fiber prefabricated bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1206696A true CN1206696A (en) | 1999-02-03 |
Family
ID=5225031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98116362 Pending CN1206696A (en) | 1997-07-24 | 1998-07-24 | Top gaseous diffuser of the deivce for drawing optical fiber from optical fiber prefabricated bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1206696A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101146379B (en) * | 2006-09-14 | 2011-11-09 | 通用电气公司 | Heater, apparatus, and associated method |
| CN103342463A (en) * | 2013-07-05 | 2013-10-09 | 江苏法尔胜光子有限公司 | Optical fiber drawing furnace |
-
1998
- 1998-07-24 CN CN 98116362 patent/CN1206696A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101146379B (en) * | 2006-09-14 | 2011-11-09 | 通用电气公司 | Heater, apparatus, and associated method |
| CN103342463A (en) * | 2013-07-05 | 2013-10-09 | 江苏法尔胜光子有限公司 | Optical fiber drawing furnace |
| CN103342463B (en) * | 2013-07-05 | 2015-05-27 | 江苏法尔胜光子有限公司 | Optical fiber drawing furnace |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |