CN108609845B - Deposition reaction kettle for preparing optical fiber preform - Google Patents
Deposition reaction kettle for preparing optical fiber preform Download PDFInfo
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- CN108609845B CN108609845B CN201810474413.1A CN201810474413A CN108609845B CN 108609845 B CN108609845 B CN 108609845B CN 201810474413 A CN201810474413 A CN 201810474413A CN 108609845 B CN108609845 B CN 108609845B
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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]
- C03B37/018—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] by glass deposition on a glass substrate, e.g. by inside-, modified-, plasma-, or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
- C03B37/01807—Reactant delivery systems, e.g. reactant deposition burners
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- Organic Chemistry (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
The invention discloses a deposition reaction kettle for preparing an optical fiber perform, which comprises a reaction kettle body, wherein a reaction cavity for accommodating an optical rod is arranged in the reaction kettle body, an air inlet mechanism and an air outlet mechanism which are communicated with the reaction cavity are respectively arranged at two opposite sides of the reaction kettle body, a blowtorch group is arranged on the wall surface of the reaction cavity at one side of the air inlet mechanism, the two sides of the air inlet mechanism in the transverse direction of the blowtorch group are respectively provided with one air inlet mechanism, the air inlet mechanism comprises an air inlet cavity in a cavity structure, an air inlet is arranged at one side of the air inlet cavity facing the outside of the reaction kettle body, a porous air plate is arranged at one side of the air inlet cavity facing the reaction cavity, and the air outlet mechanism is. According to the invention, a passive air inlet mode is adopted, fresh air firstly enters the air inlet cavity from the air inlet and is mixed, and then enters the reaction cavity from the porous air plate, so that the air speed is reduced, the phenomenon that the air flow entering the reaction cavity is too disordered is avoided, the air flow stability is improved, the flame stability of the torch is ensured, and the deposition efficiency is improved.
Description
Technical Field
The invention relates to the technical field of optical fiber manufacturing, in particular to a deposition reaction kettle for preparing an optical fiber preform.
Background
The deposition reaction kettle for preparing the optical fiber perform rod is made of SiCl4、H2、O2Hydrolysis reaction is carried out to generate SiO2The particles are deposited on the seed rod, and the production process is a chemical reaction with high temperature and generated by corrosive gas and a large amount of dust, so the production process is carried out in a specially prepared reaction kettle, and an exhaust system required by the matching reaction is designed in the reaction kettle to prevent the corrosive gas and the dust from leaking. The existing deposition reaction kettle is easy to have the condition that the airflow in the reaction kettle is not stable enough, so that the flame of a blast lamp is unstable, and the deposition efficiency and the production are influencedEfficiency, SiO2The particles are easy to accumulate in the reaction kettle, and the utilization rate of raw materials is low.
Disclosure of Invention
The invention aims to solve the technical problems and provide a deposition reaction kettle for preparing an optical fiber preform, which aims to improve the prior art and solve the problems of poor flame stability, low deposition efficiency and low raw material utilization rate caused by the difficulty in ensuring stable airflow in the reaction kettle in the prior art.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the utility model provides a preparation optical fiber perform's deposition reation kettle, includes the reation kettle body, the internal reaction cavity who holds vertical optical wand of laying that sets up of reation kettle, its characterized in that, set up air inlet mechanism and air-out mechanism with the reaction cavity intercommunication respectively in two opposite sides of the reation kettle body to set up the torch group just to the optical wand on the reaction cavity wall of air inlet mechanism place one side, air inlet mechanism respectively be provided with one in the horizontal both sides of torch group, air inlet mechanism including the air inlet chamber that is cavity structures, set up the air intake in the air inlet chamber to the external one side of reation kettle, set up the porous aerofoil of ventilation in the air inlet chamber to one side of reaction cavity, air-out mechanism connect negative pressure updraft ventilator. According to the deposition reaction kettle for preparing the optical fiber perform rod, negative pressure generated by the negative pressure air draft device is utilized to draw out gas in the reaction chamber, fresh air enters the reaction chamber from the air inlet mechanism, the stability of air flow in the reaction chamber is guaranteed in a passive air inlet mode, the fresh air entering from the air inlet mechanism enters the air inlet cavity from the air inlet first to be mixed and then enters the reaction chamber from the porous air plate, the air speed is reduced, the phenomenon that the air flow entering the reaction chamber is too disordered is avoided, the stability of the air flow is improved, the stability of flame of a blowtorch is guaranteed, the deposition efficiency is improved, and SiO (silicon dioxide) generated by the blowtorch is avoided2The granule is taken out from air-out mechanism by too much, improves the utilization ratio of raw materials, improves production efficiency.
Furthermore, the width of the air inlet in the transverse direction is smaller than that of the porous air plate, the air inlet cavity is influenced by the blowtorch, the temperature is higher, the temperature of fresh air is lower, and fresh air entering from the air inlet is effectively mixed in the air inlet cavity and then enters the reaction cavity from the porous air plate, so that the stability of air flow is improved.
Furthermore, the air inlet is formed in the position, close to the spray lamp group, of the air inlet cavity, and therefore the stability of air flow is improved.
Further, the aperture of the ventilation hole on the porous aerofoil is gradually increased from one side close to the spray lamp group to one side far away from the spray lamp group on horizontal direction, improve air inlet uniformity and airflow stability, make the dust can be effectively discharged, the loose body generates a large amount of scattered dust in the both sides of the bar in the deposition process, need in time discharge, so porous aerofoil spouts the air at spray lamp group both sides, flow direction stability when improving the dust discharge, if the porous aerofoil is the hole that even size equals will cause and be close to the optical wand surperficial amount of wind too big in the reaction chamber, and the situation that the air current convoluteed can appear in the region far away from the optical wand and lead to the dust to convolute and can not in time discharge, the dust is piled up on the inner wall of reaction chamber easily.
Furthermore, the air inlet on be provided with the nickel alloy net, slow down the wind speed, avoid the new trend too in the time of entering into the air inlet intracavity to flocculate, improve the air current stability.
Furthermore, the width of the air inlet in the transverse direction is adjustable, the width is adjusted according to the process requirements, and the flexible adjustment of the air inlet amount is met.
Furthermore, the ventilation caliber of the air outlet mechanism is adjustable, so that the air flow in the reaction chamber is more stable, and the air flow has a stable flow direction.
Furthermore, the air outlet mechanism comprises an air outlet communicated with the reaction chamber, and a transversely moving baffle for adjusting the transverse width of the air outlet is arranged on the air outlet, so that the structure is simple, and the adjustment is convenient.
Furthermore, the air outlet is vertically divided into a plurality of areas, each area is provided with a transversely-moving baffle plate for adjusting the transverse width of the air outlet in the area, the adjustment flexibility is good, the airflow stability is improved, and the deposition efficiency is improved.
Furthermore, the transverse width of the air outlet of each area is reduced from top to bottom in sequence, the negative pressure conditions at each position in the reaction chamber are balanced, and the airflow stability is improved.
Compared with the prior art, the invention has the advantages that:
according to the deposition reaction kettle for preparing the optical fiber perform rod, a passive air inlet mode is adopted, fresh air entering from the air inlet mechanism enters the air inlet cavity from the air inlet firstly, is mixed and then enters the reaction cavity from the porous air plate, the ventilation caliber of the air outlet mechanism can be flexibly adjusted, the air speed is reduced, excessive flocculation of air flow entering the reaction cavity is avoided, the air flow stability is improved, the flame stability of a blast burner is guaranteed, the deposition efficiency is improved, the raw material utilization rate is improved, and the production efficiency is improved.
Drawings
FIG. 1 is a schematic top view of a cross-sectional structure of a deposition reactor for fabricating an optical fiber preform;
FIG. 2 is a schematic structural view of a perforated wind plate;
fig. 3 is a schematic structural view of the air outlet mechanism.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The deposition reaction kettle for preparing the optical fiber perform disclosed by the embodiment of the invention can improve the stability and uniformity of air flow in the reaction kettle, thereby ensuring the stability of flame of a blast lamp, improving the deposition efficiency and stability, and avoiding SiO from being mixed by air flow2The particles are taken out of the reaction kettle to avoid SiO2The particles are stacked on the inner wall of the reaction kettle, so that the utilization rate of raw materials is improved.
As shown in fig. 1 to 3, a deposition reactor for preparing an optical fiber preform comprises a reactor body 1, the reactor body 1 is integrally rectangular and 3200 × 1200 × 900mm in height and width, a reaction chamber 2 for accommodating a vertically arranged optical rod 6 is arranged in the reactor body 1, an air inlet mechanism 3 and an air outlet mechanism 4 which are communicated with the reaction chamber 2 are respectively arranged at two opposite sides of the reactor body 1, an observation window is arranged at the other side of the reactor body 1, the observation window is made of high temperature resistant glass, the observation window can not only be used for observation but also can transmit laser to detect the outer diameter of the preform, a torch group 5 which is opposite to the optical rod 6 is arranged on the wall surface of the reaction chamber 2 at one side of the air inlet mechanism 3, the torch group 5 comprises a plurality of torches for deposition, the torches are arranged at uniform intervals along the axial direction of the optical rod, one air inlet mechanism 3 is respectively arranged at two lateral sides of the torch group 5, air inlet mechanism 3 has set up air intake 32 including the air inlet chamber 31 that is cavity structures towards the outside one side of the reaction vessel body 1 in air inlet chamber 31, has set up the porous aerofoil 33 that ventilates in air inlet chamber 31 towards one side of reaction chamber 2, air outlet mechanism 4 be located reaction vessel body 1 lateral wall central point on horizontal and just to optical wand 6, air outlet mechanism 4 is connecting negative pressure updraft ventilator 7, and negative pressure updraft ventilator 7 produces the gas of negative pressure in with reaction chamber 2 and takes out, adopts the mode of passive air inlet, ensures the air current stability in the reaction chamber 2.
The air inlet chamber 31 is a cuboid cavity, the porous air plate 33 is a rectangular plate with a plurality of vent holes on the surface, the air inlet 32 is a rectangular opening with the length direction along the vertical direction, and the width of the air inlet 32 in the transverse direction is smaller than that of the multi-hole air plate 33 in the transverse direction, the air inlet 32 is arranged on the air inlet chamber 31 at a position close to the blast lamp group 5, as shown in fig. 2, the aperture of the vent hole of the multi-hole wind plate 33 is gradually increased from the side close to the burner group 5 to the side far from the burner group 5 in the transverse direction, the aperture of the vent hole nearest to the burner group 5 is 6mm, the aperture of the vent hole farthest from the burner group 5 is 20mm, the wind pressure balance is achieved by using the difference of the apertures, the intake uniformity and the airflow stability are improved, the dust can be effectively discharged, and the dust is prevented from being discharged in time due to the fact that the dust is whirled due to the fact that airflow whirls in the area far away from the optical rod.
The air inlet 32 is provided with a nickel alloy net 34, which aims to slow down the air speed for the first time, and the fresh air can not be disturbed when entering the air inlet cavity.
The width of the air inlet 32 in the transverse direction is adjustable, and one side of the air inlet 32, which is far away from the torch group 5, is a fixed side, and one side of the air inlet 32, which is close to the torch group 5, is a movable side, and the movable side moves to adjust the width of the air inlet 32 in the transverse direction.
In order to meet the requirements of different processes, the ventilation aperture of the air outlet mechanism 4 is adjustable, and the stability of the airflow in the reaction chamber is ensured, as shown in fig. 3, the air outlet mechanism 4 includes an air outlet 41 communicated with the reaction chamber 2, the air outlet 41 is a rectangular opening, the length and width of the opening is 2300 × 130mm, a transversely-moving baffle 42 for adjusting the transverse width of the air outlet 41 is arranged on the air outlet 41, so that the ventilation aperture can be conveniently adjusted, in order to balance the negative pressure state of each position in the reaction chamber, the air outlet 41 is vertically divided into ten areas, each area is respectively provided with one transversely-moving baffle 42 for adjusting the transverse width of the air outlet 41 in the area, and the transverse width of the air outlet in each area from top to bottom is sequentially reduced, so that the adjustment flexibility is strong, and the degree of.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.
Claims (9)
1. The deposition reaction kettle for preparing the optical fiber perform rod comprises a reaction kettle body (1), wherein a reaction chamber (2) for accommodating a vertically placed optical rod (6) is arranged in the reaction kettle body (1), and is characterized in that an air inlet mechanism (3) and an air outlet mechanism (4) which are communicated with the reaction chamber (2) are respectively arranged at two opposite sides of the reaction kettle body (1), a blast burner group (5) which is just opposite to the optical rod (6) is arranged on the wall surface of the reaction chamber (2) at one side of the air inlet mechanism (3), the two transverse sides of the blast burner group (5) of the air inlet mechanism (3) are respectively provided with one, the air inlet mechanism (3) comprises an air inlet cavity (31) which is of a cavity structure, an air inlet (32) is arranged at one side of the air inlet cavity (31) facing the outside of the reaction kettle body (1), and a ventilated porous air plate (33) is arranged at one side of the air inlet cavity (31) facing the reaction chamber (2), the air outlet mechanism (4) is connected with the negative pressure air draft device (7), and the aperture of the vent hole on the porous air plate (33) is gradually increased from one side close to the spray lamp group (5) to one side far away from the spray lamp group (5) in the transverse direction.
2. The deposition reactor for fabricating an optical fiber preform according to claim 1, wherein the width of the air inlet (32) in the transverse direction is smaller than the width of the perforated air plate (33) in the transverse direction.
3. The deposition reactor for preparing optical fiber preform of claim 2, wherein the air inlet (32) is formed on the air inlet chamber (31) near the burner set (5).
4. The deposition reactor for preparing an optical fiber preform according to claim 2, wherein the air inlet (32) is provided with a nickel alloy mesh (34).
5. The deposition reactor for preparing an optical fiber preform of claim 4, wherein the width of the air inlet (32) is adjustable in the lateral direction.
6. The deposition reactor for preparing optical fiber preform of claim 1, wherein the vent aperture of the vent mechanism (4) is adjustable.
7. The deposition reactor for preparing optical fiber preform according to claim 6, wherein the air-out mechanism (4) comprises an air outlet (41) communicated with the reaction chamber (2), and a transversely moving baffle (42) for adjusting the transverse width of the air outlet (41) is disposed on the air outlet (41).
8. The deposition reactor for preparing optical fiber preform according to claim 7, wherein the outtake vent (41) is divided into several areas in vertical direction, and each area is provided with a laterally moving baffle (42) for adjusting the lateral width of the outtake vent (41) of the area.
9. The deposition reactor according to claim 8, wherein the lateral width of the outlet of each zone decreases from top to bottom.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810474413.1A CN108609845B (en) | 2018-05-17 | 2018-05-17 | Deposition reaction kettle for preparing optical fiber preform |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810474413.1A CN108609845B (en) | 2018-05-17 | 2018-05-17 | Deposition reaction kettle for preparing optical fiber preform |
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| Publication Number | Publication Date |
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| CN108609845A CN108609845A (en) | 2018-10-02 |
| CN108609845B true CN108609845B (en) | 2021-02-02 |
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| CN201810474413.1A Active CN108609845B (en) | 2018-05-17 | 2018-05-17 | Deposition reaction kettle for preparing optical fiber preform |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09208248A (en) * | 1996-02-06 | 1997-08-12 | Nippon Telegr & Teleph Corp <Ntt> | Surface treatment of preform for fluoride optical fiber |
| CN1406889A (en) * | 2001-08-09 | 2003-04-02 | 住友电气工业株式会社 | Method and apparatus for producing porous glass body |
| CN104843988A (en) * | 2015-06-05 | 2015-08-19 | 江苏法尔胜光子有限公司 | Multi-burner OVD (outside vapour deposition) preparation device of soot optical fiber preforms |
| CN105776844A (en) * | 2016-05-06 | 2016-07-20 | 藤仓烽火光电材料科技有限公司 | Loosen body deposition reactor and operation method thereof |
| CN107986612A (en) * | 2017-12-19 | 2018-05-04 | 长飞光纤光缆股份有限公司 | A kind of VAD prepares the device of fibre parent material |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1256553B1 (en) * | 2001-05-08 | 2011-03-23 | Shin-Etsu Chemical Co., Ltd. | Apparatus and method for producing a glass preform for optical fibres by deposition |
-
2018
- 2018-05-17 CN CN201810474413.1A patent/CN108609845B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09208248A (en) * | 1996-02-06 | 1997-08-12 | Nippon Telegr & Teleph Corp <Ntt> | Surface treatment of preform for fluoride optical fiber |
| CN1406889A (en) * | 2001-08-09 | 2003-04-02 | 住友电气工业株式会社 | Method and apparatus for producing porous glass body |
| CN104843988A (en) * | 2015-06-05 | 2015-08-19 | 江苏法尔胜光子有限公司 | Multi-burner OVD (outside vapour deposition) preparation device of soot optical fiber preforms |
| CN105776844A (en) * | 2016-05-06 | 2016-07-20 | 藤仓烽火光电材料科技有限公司 | Loosen body deposition reactor and operation method thereof |
| CN107986612A (en) * | 2017-12-19 | 2018-05-04 | 长飞光纤光缆股份有限公司 | A kind of VAD prepares the device of fibre parent material |
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| CN108609845A (en) | 2018-10-02 |
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