CN1014699B - Method of fabricating porous glass rod and apparatus for fabricating the same - Google Patents
Method of fabricating porous glass rod and apparatus for fabricating the sameInfo
- Publication number
- CN1014699B CN1014699B CN 86103651 CN86103651A CN1014699B CN 1014699 B CN1014699 B CN 1014699B CN 86103651 CN86103651 CN 86103651 CN 86103651 A CN86103651 A CN 86103651A CN 1014699 B CN1014699 B CN 1014699B
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- CN
- China
- Prior art keywords
- porous glass
- glass rod
- reaction vessel
- fabricating porous
- passage portion
- 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.)
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Abstract
The present invention relates to a method and an apparatus for fabricating a porous glass rod. The apparatus comprises a reaction container which is provided with a path part in up direction and down direction and a burner for producing glass particles, and a target which is inserted into the container from the path part and can move up and down. At the lower end of the target rotating at the located position in the container, the glass particles produced by the burner are splashed and stacked to form the porous glass rod, and the target is pulled up according to the growing rate of the porous glass rod, wherein a descending air current is produced along the periphery of the path part in the container.
Description
The present invention relates to by method and the device thereof of optical systems such as vapor-phase axial deposition (VAD) manufactured optical fiber, post lens with porous glass base material.
When adopting vapor-phase axial deposition (VAD) manufactured optical system porous glass base material, be necessary to make the air-flow in the reaction vessel that has formed this manufacturing gaseous media to be stablized, if can not guarantee this stability fully, so, the variation of variation of the external diameter of porous glass base material and index distribution will increase.
For this reason, people have taked some adequate measures, as control the exhaust pressure of reaction vessel or make and be subjected to flow control and pressure controlled gas and flow to its inside from the top of reaction vessel, as the technology of relevant this respect, for example specially open the invention that clear 56-69234 communique, spy open in the clear 57-135738 communique and had open.
Traditional method can be referring to Fig. 3 (A) (B), here illustration special invention of opening clear 57-135738 communique, wherein 1 is the reaction vessel with venting port 2, the 3rd, insert its inner path pipe from the top of reaction vessel 1, the 4th, adorning from bottom to its inside of reaction vessel 1 and to generate the burner that glass granules is used, the 5th, target, the 6th, fabricating porous glass rod and apparatus.
Adopt the method for Fig. 3, when forming glass stick 6 be make below fixed gas flows to it from the inside of path pipe 3, but as shown in this figure (A), the amount of leaving a blank in the formation initial stage of fabricating porous glass rod and apparatus 6 path pipe 3 is bigger, and growing up along with glass stick 6, when making it invade the inside of path pipe 3, the above-mentioned amount of leaving a blank just diminishes.
Therefore, along with growing up of fabricating porous glass rod and apparatus 6, the flowability of process path pipe 3 will change, and meanwhile, the sensing (injection direction of glass granules) of the burner flame in the reaction vessel 1 also can change.
In holding the invention of clear 56-69234 communique, the spy who has omitted explanation also same phenomenon can take place.
Just as described above, under the occasion of traditional method, because the sensing of burner flame can change, therefore just can not prevent the external diameter variation of glass stick 6 and the variation of index distribution when making the fabricating porous glass rod and apparatus 6 of desired length conscientiously, the flow control in this path pipe that this is compensated 3, the pressure-controlling in the reaction vessel 1 are also had any problem.
On the other hand, internal diameter at enlarged passageway pipe 3 makes the variation of above-mentioned flowability little under the situation that can ignore degree, though it is stable that the external diameter of fabricating porous glass rod and apparatus 6 can reach, but this is to owing to can diminish from the energy of flow on reaction vessel top, the glass granules that comes out from burner 4 will be at container 1 civil strike dance, thereby makes the stability of index distribution of fabricating porous glass rod and apparatus 6 be damaged.
The present invention is exactly in view of the above problems, attempts to provide flowability in a kind of stopping reaction container, and makes the method and the device thereof of the stable fabricating porous glass rod and apparatus of external diameter, the index distribution of length direction whereby.
Method of the present invention is, employing has from the venting port of container side and leads to the passage portion of its inner above-below direction from the top of container and glass granules is installed to its inside from the container bottom and generates reaction vessel with burner, but the target that the easy on and off that is inserting in also adopting from above-mentioned passage portion to reaction vessel moves and rotates freely, the lower end of the target that is rotating on the institute's allocation in reaction vessel, thereby spray and pile up the glass granules that produces by burner and form fabricating porous glass rod and apparatus, according to the coarsening rate of this fabricating porous glass rod and apparatus target is upwards drawn again, it is characterized in that on a kind of like this method of making fabricating porous glass rod and apparatus the inside that makes reaction vessel produces downdraft along the periphery of its passage portion.
The inventive system comprises and have from the venting port of container side and feed the passage portion of its inner above-below direction from the top of container, and the glass granules that is installed with to its inside from the container bottom generates the reaction vessel with burner, but also comprise the target that the easy on and off that inserting from above-mentioned passage portion to reaction vessel interior moves and rotates freely, it is characterized in that on the manufacturing installation of the fabricating porous glass rod and apparatus that possesses this reaction vessel and this target, cylindrical shell with air-tightness is attached to the top of above-mentioned path, in the top of reaction vessel, form gas flow path between the periphery of week and passage portion, flow into part and form gas in the upper end of this gas passage so that form downdraft.
In the present invention, thereby the lower end that makes glass granules that the burner front end in the reaction vessel ejects be deposited in the target that is in rotating state forms fabricating porous glass rod and apparatus, and target is pulled upwardly according to the coarsening rate of this fabricating porous glass rod and apparatus, though these are identical with existing example, but when this method forms fabricating porous glass rod and apparatus, should make the interior periphery of reaction vessel produce downdraft along passage portion.
As mentioned above, when making fabricating porous glass rod and apparatus, fabricating porous glass rod and apparatus is with the inside of target by passage portion, and downdraft then flows to venting port along the periphery of passage portion.
Therefore, owing to be target at first by being that the fabricating porous glass rod and apparatus of having grown up is by this path then, so even the amount of leaving a blank in the passage portion changes, air-flow along this passage portion periphery decline, can not be subjected to the influence that the variation because of the above-mentioned amount of leaving a blank produces yet, and present stable flowability all the time.
Its result, owing to be the downdraft of steady state, the external diameter of fabricating porous glass rod and apparatus mother metal just can be fixed substantially, flame sensing for the constructional surface burner also is a fixed in addition, and can prevent the disorderly dance of the glass granules that produces because of downdraft, because these multiple effects, the index distribution of porous glass base material length direction can be stablized, so just can obtain all excellent porous glass base material of quality and characteristic.
Embodiment
Followingly describe with reference to the object lesson of accompanying drawing to method of the present invention and device thereof.
Among last Fig. 1 and Fig. 2, the 11st, have the reaction vessel of venting port 12, the 13rd, the top of autoreaction the container 11 and passage portion that be provided with inner to it, the 14th, the glass granules that the bottom of autoreaction container 11 to its inside is installed with generates and uses burner, and the 15th, the known target that can rotate freely and move up and down.
In the above, above passage portion 13, connecting cylindrical shell 16 with air-tightness, in the top of reaction vessel 11, forming between the periphery of week and passage portion 13 to producing the gas flow path 17 of downdraft, forming gas simultaneously in the upper end of this gas flow path 17 and flowed into part 18.
Again, under the situation of Fig. 1, by several circular through-holes that on reaction vessel 11, equally spaced wearing, form gas and flowed into part 18, under the situation of Fig. 2, form gas by member and flow into part 18, meanwhile, on gas introduction port 19, connecting tubing system 22 with flow regulator 21 with gas introduction port 19 and ring-type discharge opening 20.
Among the figure, 23 expression fabricating porous glass rod and apparatus.
When adopting above-mentioned illustrated device to make fabricating porous glass rod and apparatus 23, target 15 its lower ends will be inserted into the institute's allocation in the reaction vessel 11 always and be rotated, and it is that glass granules just sprays towards the lower end of above-mentioned target 15 and by accumulation that the flame by burner 14 adds resultant that the water decomposition reaction produced.
Accumulation by this glass granules, lower end at target 15 has just formed fabricating porous glass rod and apparatus 23, again according to the coarsening rate of this fabricating porous glass rod and apparatus 23, target 15 is up pull-up of quilt in passage portion 13 and in the cylindrical shell 16, but at this moment, the inside of reaction vessel 11 simultaneously is accompanied by deflated again and imports naturally carrying out deflated by venting port 12, in addition, import by pressure from tubing system 22, the gas of regulation just flows into part 18 from gas and imports gas flow path 17, and forms along the downdraft of the periphery of passage portion 13 by it.
As mentioned above, this downdraft that flows into venting port 12 along the periphery of passage portion 13 demonstrates the stable flowability that the quantitative changeization that is not subjected to leave a blank in the passage portion 13 influences, and can obtain towards the sensing of the fixed burner flame of constructional surface and stop disorderly action effect such as dance of glass granules, so the external diameter of length direction of porous glass base material 23 and the distribution of specific refractory power are stablized.
In addition, according to the above when making fabricating porous glass rod and apparatus 23, be necessary to implement the exhaust pressure that should make in the reaction vessel, the flow of downdraft etc. and keep certain pressure-controlling and flow control, and these controls to be the free air delivery setter (not shown) by the tubing system that is connected venting port 12, the flow regulator 21 etc. that is connected the tubing system 22 of gas introduction port 19 regulate.
As discussed above, utilization the inventive method, when adopting vapor-phase axial deposition (VAD) manufactured fabricating porous glass rod and apparatus, because the periphery that is the passage portion in the reaction vessel has produced downdraft, so just this stable downdraft that can influence by the quantitative changeization of leaving a blank that is not subjected in the passage portion obtains the external diameter and the stable fabricating porous glass rod and apparatus mother metal of index distribution of length direction.
On the other hand, device of the present invention not only comprises the venting port and the passage portion of reaction vessel, the burner of glass granules generation usefulness and target etc., but also in the top of reaction vessel, formed gas flow path between week and the periphery of passage portion, form gas in the upper end of this gas flow path and flowed into part, above above-mentioned passage portion, linking cylindrical shell with air-tightness, so just can easily make it to produce fixed downdraft, the pulling on operation and also can utilize the cylindrical shell on the passage portion and under the situation of not destroying gaseous media in the reaction vessel, carried out of fabricating porous glass rod and apparatus.
The explanatory view of one embodiment of Fig. 1 has been simple displaying the inventive method and device, Fig. 2 is a simple displaying and the explanatory view of last identical other embodiment, Fig. 3 (A) is the explanatory view of prior art example (B).
11 ... reaction vessel
12 ... venting port
13 ... passage portion
14 ... burner
15 ... target
16 ... cylindrical shell
17 ... gas flow path
18 ... gas flows into part
19 ... gas introduction port
20 ... the gas discharge opening
21 ... flow regulator
22 ... tubing
23 ... fabricating porous glass rod and apparatus
Claims (7)
1, a kind of manufacture method of fabricating porous glass rod and apparatus, employing has from the venting port of container side and leads to the passage portion of its inner above-below direction from the top of container and the glass granules that is installed with to its inside from the container bottom generates reaction vessel with burner, the target that moves up and down and can rotate freely that is inserting in also adopting from above-mentioned passage portion to reaction vessel, thereby the lower end of the target that the institute's allocation in reaction vessel is rotating is sprayed and is piled up the glass granules that produces by burner and forms fabricating porous glass rod and apparatus, coarsening rate according to this fabricating porous glass rod and apparatus is pulled upwardly target again, it is characterized in that in a kind of like this method of making fabricating porous glass rod and apparatus, cylindrical shell with air-tightness is connected to the top of above-mentioned path, in the top of reaction vessel, form gas flow path between the periphery of week and passage portion, flow into part and form gas in the upper end of this gas passage so that form downdraft.
2, the manufacture method of fabricating porous glass rod and apparatus according to claim 1 is characterized in that keeping necessarily the flow of this air-flow being regulated for making along the downdraft of passage portion periphery.
3, the manufacture method of fabricating porous glass rod and apparatus according to claim 1 is characterized in that for making exhaust pressure in the reaction vessel keep necessarily the flow along the downdraft of passage portion periphery is regulated.
4, a kind of manufacturing installation of fabricating porous glass rod and apparatus, comprise and have from the venting port of container side and feed the passage portion of its inner above-below direction from the top of container, and the glass granules that is installed with to its inside from the container bottom generates the reaction vessel with burner, comprise that also but the easy on and off that inserting from above-mentioned passage portion to reaction vessel interior movably and the target that can rotate freely, it is characterized in that on the manufacturing installation of the fabricating porous glass rod and apparatus that possesses this reaction vessel and this target, one cylindrical shell with air-tightness is connected the top of above-mentioned path, forms gas in the upper end of this gas passage and flows into part.
5, the manufacturing installation of fabricating porous glass rod and apparatus according to claim 4 is characterized in that gas flows into part and comprises several open-works that are located in above the reaction vessel.
6, the manufacturing installation of fabricating porous glass rod and apparatus according to claim 4 is characterized in that having formed gas by the member with gas introduction port and ring-type gas discharge opening flows into part.
7, the manufacturing installation of fabricating porous glass rod and apparatus according to claim 6 is characterized in that connecting the tubing system with flow regulator at gas introduction port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86103651 CN1014699B (en) | 1986-05-26 | 1986-05-26 | Method of fabricating porous glass rod and apparatus for fabricating the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86103651 CN1014699B (en) | 1986-05-26 | 1986-05-26 | Method of fabricating porous glass rod and apparatus for fabricating the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86103651A CN86103651A (en) | 1987-12-09 |
| CN1014699B true CN1014699B (en) | 1991-11-13 |
Family
ID=4802144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86103651 Expired CN1014699B (en) | 1986-05-26 | 1986-05-26 | Method of fabricating porous glass rod and apparatus for fabricating the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1014699B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098221C (en) * | 2000-11-23 | 2003-01-08 | 中国科学院西安光学精密机械研究所 | Process for preparing slender rod shaped optical lens |
| JP4742429B2 (en) * | 2001-02-19 | 2011-08-10 | 住友電気工業株式会社 | Method for producing glass particulate deposit |
| CN1318332C (en) * | 2002-10-21 | 2007-05-30 | 富通集团有限公司 | Method and device for making prefabricated optical fibre |
| JP4689982B2 (en) * | 2004-07-14 | 2011-06-01 | アルプス電気株式会社 | Optical element manufacturing method |
-
1986
- 1986-05-26 CN CN 86103651 patent/CN1014699B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN86103651A (en) | 1987-12-09 |
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