CN105776843A - Deposition reaction device for manufacturing low-loss optical fiber preform rod and pressure adjusting method - Google Patents
Deposition reaction device for manufacturing low-loss optical fiber preform rod and pressure adjusting method Download PDFInfo
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- CN105776843A CN105776843A CN201610300144.8A CN201610300144A CN105776843A CN 105776843 A CN105776843 A CN 105776843A CN 201610300144 A CN201610300144 A CN 201610300144A CN 105776843 A CN105776843 A CN 105776843A
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- reaction vessel
- blowtorch
- pressure gauge
- pressure
- low loss
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- 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
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/01406—Deposition reactors therefor
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- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General 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)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention discloses a deposition reaction device for manufacturing a low-loss optical fiber preform rod and a pressure adjusting method, and relates to the technical field of manufacturing of optical fiber preform rods. The device comprises a pressure gauge, a controller and a reaction vessel with an open top, wherein the pressure gauge and the reaction vessel are connected, and high-purity inert gas with purity higher than 99 percent circulates in the reaction vessel; a first blast burner for making a cladding layer and a second blast burner for making a core layer are arranged on one side of the reaction vessel, and the second blast burner is located between the first blast burner and a plane of the bottom of the reaction vessel; the bottom of the reaction vessel is connected with a matching pipe, the matching pipe is communicated with the inside of the reaction vessel, a flow adjuster is arranged on the matching pipe and the flow adjuster is connected with the pressure gauge through the controller. According to the deposition reaction device for manufacturing the low-loss optical fiber preform rod and the pressure adjusting method, metal impurities can be effectively prevented from entering glass micro-particle sedimentary bodies, the content of metal impurities in the manufactured optical fiber preform rod is low and the impurity absorption loss is smaller.
Description
Technical field
The present invention relates to the manufacturing technology field of preform, be specifically related to a kind of deposition reaction device preparing low loss fiber prefabricated rods and pressure regulating method.
Background technology
One of key link of VAD (Vapor-phaseAxialDeposition, vapor axial deposits) method of optical fiber preform producing is to generate glass granules by blowtorch, and forms the lithosomic body of glass granules in reaction vessel.In existing deposition reaction device, reaction vessel sidewall has some pores, after HEPA filter cleaning air, then supplies in reaction vessel again.But, cleaned air contains the metal impurities of trace.Metal impurities in air are mixed into preform, and light-decay characteristic is had undesirable effect.
Summary of the invention
For the defect existed in prior art, it is an object of the invention to provide the deposition reaction device pressure regulating method for preparing low loss fiber prefabricated rods, this device can effectively prevent metal impurities to be mixed into glass microbead deposit, therefore, the preform metals content impurity prepared is few, and Impurity Absorption loss is relatively low.
The present invention provides a kind of deposition reaction device for preparing low loss fiber prefabricated rods, this device includes open-topped reaction vessel, this device also includes Pressure gauge, controller, and Pressure gauge is connected with reaction vessel, and reaction vessel interior circulation has the high-purity noble gas that purity is higher than 99%；The side of reaction vessel is provided with the first blowtorch for preparing covering, for preparing the second blowtorch of sandwich layer, the second blowtorch is between the first blowtorch and reaction container bottom place plane；Reaction container bottom is connected to pipe arrangement, and pipe arrangement connects with reaction vessel interior, and pipe arrangement is provided with flow regulator, and flow regulator is connected with Pressure gauge by controller.
On the basis of technique scheme, described first blowtorch, all gaps between the second blowtorch and reaction vessel are all filled with silica gel.
On the basis of technique scheme, described silica gel not metal impurities, and tolerable temperature is more than 200 DEG C.
On the basis of technique scheme, described Pressure gauge is electronic pressure meter, and Pressure gauge is connected with by controller by distribution.
On the basis of technique scheme, the nozzle segment of described first blowtorch is positioned at reaction vessel interior, and remainder is positioned at outside reaction vessel.
On the basis of technique scheme, the nozzle segment of described second blowtorch is positioned at reaction vessel interior, and remainder is positioned at outside reaction vessel.
On the basis of technique scheme, the internal diameter of described pipe arrangement is 4～8 millimeters.
On the basis of technique scheme, the material of described reaction vessel is pottery or quartz glass.
The present invention also provides for a kind of pressure regulating method being applied to above-mentioned deposition reaction device, comprises the following steps:
By the mode of welding or packing to the sealing gap between reaction vessel and the first blowtorch, the second blowtorch；
High-purity noble gas is passed into reaction vessel by pipe arrangement, through the first blowtorch, the second blowtorch, is exhausted from the top of reaction vessel；
Pressure in reaction vessel is monitored by Pressure gauge, Pressure gauge presets pressure limit, when reaction vessel detected intrinsic pressure exceed this value range time, Pressure gauge transmits a signal to controller, the flow of high-purity noble gas is adjusted by controller instruction flow regulator, makes the air pressure that the air pressure in reaction vessel is projecting.
Compared with prior art, it is an advantage of the current invention that:
(1) usually containing the metal impurities of trace in air, the reaction vessel sidewall of the present invention is closed structure, it is possible to effectively prevent the air containing metal impurities from entering.Air replaces with high-purity noble gas, and the metal impurities in high-purity noble gas are less, it is possible to effectively reduce the metal impurities being mixed into glass microbead deposit.High-purity noble gas passes into from the bottom of reaction vessel, and discharges from the top of reaction vessel, so without influence on the air-flow of blowtorch ejection, the air-flow olderly flowage in reaction vessel, it is ensured that depositing homogeneous.
(2) present invention is additionally provided with Pressure gauge and flow regulator, ensure that reaction vessel interior pressure is more than ambient pressure, metal impurities are prevented to be mixed into glass microbead deposit further, therefore, adopting the preform metals content impurity that the present invention prepares few, Impurity Absorption loss is relatively low.
Accompanying drawing explanation
Fig. 1 is the structural representation of deposition reaction device in the embodiment of the present invention.
Accompanying drawing labelling: 1-reaction vessel, 2-glass microbead deposit, 3-the first blowtorch, 4-the second blowtorch, 5-Pressure gauge, 6-flow regulator, 7-pipe arrangement, 8-controller.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described in further detail.
Shown in Figure 1, the embodiment of the present invention provides a kind of deposition reaction device for preparing low loss fiber prefabricated rods, this device includes open-topped reaction vessel 1, this device also includes Pressure gauge 5, controller 8, Pressure gauge 5 is connected with reaction vessel 1, and reaction vessel 1 internal flow is connected with the purity high-purity noble gas higher than 99%；The side of reaction vessel 1 is provided with the first blowtorch 3 for preparing covering, for preparing the second blowtorch 4 of sandwich layer, the second blowtorch 4 is bottom the first blowtorch 3 and reaction vessel 1 between the plane of place；Being connected to pipe arrangement 7 bottom reaction vessel 1, pipe arrangement 7 is internal with reaction vessel 1 to be connected, and pipe arrangement 7 is provided with flow regulator 6, and flow regulator 6 is connected with Pressure gauge 5 by controller 8.Pressure gauge 5 is electronic pressure meter, and Pressure gauge 5 is connected with controller 8 by distribution.
The material of first blowtorch the 3, second blowtorch 4 is quartz glass, and the material of reaction vessel 1 can be pottery or quartz glass.All gaps between first blowtorch the 3, second blowtorch 4 and reaction vessel 1 are all filled with silica gel, the silica gel of employing not metal impurities, and tolerable temperature is more than 200 DEG C.It is internal that the nozzle segment of the first blowtorch 3 is positioned at reaction vessel 1, and remainder is positioned at outside reaction vessel 1；It is internal that the nozzle segment of the second blowtorch 4 is positioned at reaction vessel 1, and remainder is positioned at outside reaction vessel 1.Quantity >=1 of the first blowtorch 3, quantity >=1 of the second blowtorch 4.
The inside diameter ranges of pipe arrangement 7 is 4～8 millimeters, and when the internal diameter of reaction vessel 1 is less than 200 millimeters, the internal diameter of pipe arrangement 7 is 4 millimeters；When the internal diameter of reaction vessel 1 is more than 200 millimeters, the internal diameter of pipe arrangement 7 is 8 millimeters.
The embodiment of the present invention also provides for a kind of pressure regulating method being applied to said apparatus, comprises the following steps:
By the mode of welding or packing, the reaction vessel 1 of use in VAD method and the gap of blowtorch (first blowtorch the 3, second blowtorch 4) are carried out airtight.The gasket not metal impurities used during packing, and there is thermostability (more than 200 DEG C).High-purity noble gas enters reaction vessel 1 by pipe arrangement 7, and high-purity noble gas circulates in reaction vessel 1, through glass microbead deposit the 2, first blowtorch the 3, second blowtorch 4, is exhausted from the top of reaction vessel 1.Pressure in reaction vessel 1 is monitored by Pressure gauge 5, this Pressure gauge 5 presets pressure limit, when reaction vessel 1 detected intrinsic pressure exceed this value range time, Pressure gauge 5 transmits a signal to controller 8, controller 8 indicates flow regulator 6 that the flow of high-purity noble gas is adjusted, make the air pressure that the air pressure in reaction vessel 1 is projecting, prevent metal impurities to be mixed in reaction vessel 1 with this.Owing to impurity concentration contained in high-purity noble gas is non-normally low, it is also very small amount of for being therefore mixed into the metal impurities in glass microbead deposit 2, and therefore, the metal impurities of the preform that the employing present invention prepares are less, and Impurity Absorption loss is relatively low.
The present invention is not only limited to above-mentioned preferred forms; anyone can draw other various forms of products under the enlightenment of the present invention; no matter but in its shape or structure, do any change, every have same or like with the present invention like technical scheme, all within its protection domain.
Claims (10)
1. the deposition reaction device being used for preparing low loss fiber prefabricated rods, this device includes open-topped reaction vessel (1), it is characterized in that, this device also includes Pressure gauge (5), controller (8), Pressure gauge (5) is connected with reaction vessel (1), and reaction vessel (1) internal flow is connected with the purity high-purity noble gas higher than 99%；The side of reaction vessel (1) is provided with the first blowtorch (3) for preparing covering, is used for preparing second blowtorch (4) of sandwich layer, and the second blowtorch (4) is positioned between the first blowtorch (3) and place, reaction vessel (1) bottom plane；Reaction vessel (1) bottom is connected to pipe arrangement (7), pipe arrangement (7) is internal with reaction vessel (1) to be connected, pipe arrangement (7) is provided with flow regulator (6), and flow regulator (6) is connected with Pressure gauge (5) by controller (8).
2. the deposition reaction device for preparing low loss fiber prefabricated rods as claimed in claim 1, it is characterised in that: all gaps between described first blowtorch (3), the second blowtorch (4) and reaction vessel (1) are all filled with silica gel.
3. the deposition reaction device for preparing low loss fiber prefabricated rods as claimed in claim 2, it is characterised in that: described silica gel not metal impurities, and tolerable temperature is more than 200 DEG C.
4. the deposition reaction device for preparing low loss fiber prefabricated rods as claimed in claim 1, it is characterised in that: described Pressure gauge (5) is electronic pressure meter.
5. the deposition reaction device for preparing low loss fiber prefabricated rods as claimed in claim 1, it is characterised in that: described Pressure gauge (5) is connected with controller (8) by distribution.
6. the deposition reaction device for preparing low loss fiber prefabricated rods as claimed in claim 1, it is characterized in that: it is internal that the nozzle segment of described first blowtorch (3) is positioned at reaction vessel (1), and remainder is positioned at outside reaction vessel (1).
7. the deposition reaction device for preparing low loss fiber prefabricated rods as claimed in claim 1, it is characterized in that: it is internal that the nozzle segment of described second blowtorch (4) is positioned at reaction vessel (1), and remainder is positioned at outside reaction vessel (1).
8. the deposition reaction device for preparing low loss fiber prefabricated rods as claimed in claim 1, it is characterised in that: the internal diameter of described pipe arrangement (7) is 4～8 millimeters.
9. the deposition reaction device for preparing low loss fiber prefabricated rods as claimed in claim 1, it is characterised in that: the material of described reaction vessel (1) is pottery or quartz glass.
10. one kind is applied to the pressure regulating method of deposition reaction device described in claim 1, it is characterised in that comprise the following steps:
By the mode of welding or packing to the sealing gap between reaction vessel (1) and the first blowtorch (3), the second blowtorch (4)；
High-purity noble gas is passed into reaction vessel (1) by pipe arrangement (7), through the first blowtorch (3), the second blowtorch (4), is exhausted from the top of reaction vessel (1)；
Pressure in reaction vessel (1) is monitored by Pressure gauge (5), Pressure gauge (5) presets pressure limit, when reaction vessel (1) detected intrinsic pressure exceed this value range time, Pressure gauge (5) transmits a signal to controller (8), the flow of high-purity noble gas is adjusted by controller (8) instruction flow regulator (6), makes the air pressure that the air pressure in reaction vessel (1) is projecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610300144.8A CN105776843A (en) | 2016-05-06 | 2016-05-06 | Deposition reaction device for manufacturing low-loss optical fiber preform rod and pressure adjusting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610300144.8A CN105776843A (en) | 2016-05-06 | 2016-05-06 | Deposition reaction device for manufacturing low-loss optical fiber preform rod and pressure adjusting method |
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| Publication Number | Publication Date |
|---|---|
| CN105776843A true CN105776843A (en) | 2016-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610300144.8A Pending CN105776843A (en) | 2016-05-06 | 2016-05-06 | Deposition reaction device for manufacturing low-loss optical fiber preform rod and pressure adjusting method |
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| CN (1) | CN105776843A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108147654A (en) * | 2016-12-02 | 2018-06-12 | 中天科技精密材料有限公司 | The manufacturing equipment and its manufacturing method of preform |
| CN111320374A (en) * | 2018-12-15 | 2020-06-23 | 中天科技精密材料有限公司 | Optical fiber preform and method for manufacturing the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86104327A (en) * | 1985-06-21 | 1986-12-17 | 古河电气工业株式会社 | The manufacturing installation of optical fiber base |
| JP2000109329A (en) * | 1998-08-04 | 2000-04-18 | Sumitomo Electric Ind Ltd | Production of porous preform |
| CN1516682A (en) * | 2001-06-15 | 2004-07-28 | 住友电气工业株式会社 | Method for producing glass particle deposited body |
-
2016
- 2016-05-06 CN CN201610300144.8A patent/CN105776843A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86104327A (en) * | 1985-06-21 | 1986-12-17 | 古河电气工业株式会社 | The manufacturing installation of optical fiber base |
| JP2000109329A (en) * | 1998-08-04 | 2000-04-18 | Sumitomo Electric Ind Ltd | Production of porous preform |
| CN1516682A (en) * | 2001-06-15 | 2004-07-28 | 住友电气工业株式会社 | Method for producing glass particle deposited body |
Non-Patent Citations (1)
| Title |
|---|
| 《液压与气压传动技术基础》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108147654A (en) * | 2016-12-02 | 2018-06-12 | 中天科技精密材料有限公司 | The manufacturing equipment and its manufacturing method of preform |
| CN108147654B (en) * | 2016-12-02 | 2020-05-01 | 中天科技精密材料有限公司 | Apparatus for manufacturing optical fiber preform and method for manufacturing the same |
| CN111320374A (en) * | 2018-12-15 | 2020-06-23 | 中天科技精密材料有限公司 | Optical fiber preform and method for manufacturing the same |
| CN111320374B (en) * | 2018-12-15 | 2023-09-26 | 中天科技精密材料有限公司 | Optical fiber preform and method for manufacturing the same |
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Application publication date: 20160720 |