CN113213753B - Device and method for improving OVD (over-the-counter) deposition efficiency - Google Patents
Device and method for improving OVD (over-the-counter) deposition efficiency Download PDFInfo
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- CN113213753B CN113213753B CN202110772121.8A CN202110772121A CN113213753B CN 113213753 B CN113213753 B CN 113213753B CN 202110772121 A CN202110772121 A CN 202110772121A CN 113213753 B CN113213753 B CN 113213753B
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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]
- C03B37/01413—Reactant delivery systems
- C03B37/0142—Reactant deposition burners
- C03B37/01426—Plasma deposition burners or torches
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2207/00—Glass deposition burners
- C03B2207/46—Comprising performance enhancing means, e.g. electrostatic charge or built-in heater
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2207/00—Glass deposition burners
- C03B2207/60—Relationship between burner and deposit, e.g. position
- C03B2207/66—Relative motion
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Abstract
The invention relates to the technical field of optical fiber perform manufacturing, in particular to a device and a method for improving OVD deposition efficiency. The device includes: a flow guiding device and at least one reaction blast lamp. The reaction blowtorch can move along the axial direction of the optical fiber perform rod and is used for ejecting reaction flame to the optical fiber perform rod; the flow guide device is arranged on the outer side of the reaction blowtorch and used for compressing and guiding reaction flame to the axial direction of the optical fiber perform. When using, make the axial displacement of reaction blowtorch along optical fiber perform to when the axial displacement of reaction blowtorch along optical fiber perform, utilize guiding device will react flame to optical fiber perform's axial direction compression water conservancy diversion, make reaction flame and optical fiber perform have more area of contact, can solve prior art, the diameter of target bar deposit early stage is less, and is less with the area of oxyhydrogen flame contact, leads to the problem that deposition efficiency is low.
Description
Technical Field
The invention relates to the technical field of optical fiber perform manufacturing, in particular to a device and a method for improving OVD deposition efficiency.
Background
Chemical vapor deposition, which refers to a method in which chemical gases or vapors react on the surface of a substrate to synthesize a coating or nanomaterial, is the most widely used technique in the semiconductor industry for depositing a variety of materials, including a wide range of insulating materials, most metallic materials and metal alloy materials. Two or more gaseous starting materials are introduced into a reaction chamber and then chemically react with each other to form a new material that is deposited on the wafer surface.
In the prior art, a method for preparing an optical fiber preform by OVD (Outside Vapor Deposition) is to install a target rod in a reaction chamber, and N Deposition units deposit the target rod while moving. The deposition reaction is to generate glass particles through the reaction of oxyhydrogen flame and silicon tetrachloride, and the glass particles are deposited and attached on a target rod. As more and more glass particles are attached to the target rod, the target rod gradually grows to form a silicon dioxide loose body, and transparent glass is formed by heating.
However, the target rod has a small diameter in the early stage of deposition and a small area in contact with the oxyhydrogen flame, and the generated glass particles cannot be effectively deposited on the target rod, resulting in low deposition efficiency.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a device and a method for improving OVD (over-the-horizon) deposition efficiency, which can solve the problems that the diameter of a target rod in the early deposition stage is smaller, the contact area with oxyhydrogen flame is smaller, and the deposition efficiency is low in the prior art.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
in one aspect, the present invention provides an apparatus for improving OVD deposition efficiency, comprising:
at least one reaction torch which can move along the axial direction of the optical fiber preform and is used for spraying reaction flame to the optical fiber preform;
and the flow guide device is arranged on the outer side of the reaction blowtorch and is used for compressing and guiding the reaction flame to the axial direction of the optical fiber perform.
In some optional schemes, the guiding device includes two guiding gas pipes, which are respectively disposed at two sides of the reaction torch and located at two sides of the optical fiber preform, and the guiding gas pipes are configured to eject guiding gas to compress and guide the reaction flame so as to extend in an axial direction of the optical fiber preform.
In some optional schemes, the optical fiber preform further comprises an outer diameter measuring instrument and a control unit, wherein the outer diameter measuring instrument is used for measuring the diameter of the optical fiber preform in real time, and the control unit is used for adjusting the direction of the guide gas pipe for ejecting the guide gas to always eject the guide gas to a preset position according to a diameter detection signal of the outer diameter measuring instrument.
In some optional schemes, the axial directions of the reaction torch and the optical fiber preform are perpendicular to each other, and the preset position is a tangent line of the optical fiber preform after the axial planes of the reaction torch and the optical fiber preform are translated.
In some optional schemes, the nozzles of the guiding gas pipe are flat, and are used for ejecting the guiding gas out along a plane parallel to the axis of the optical fiber preform rod in a flat shape.
In some optional schemes, the device further comprises a deflection mechanism which is in signal connection with the control unit and is used for adjusting the guided gas sprayed by the guided gas pipe to be always sprayed to a preset position according to the control signal received by the control unit.
In some optional schemes, the optical fiber preform further comprises a reaction vessel sleeved outside the optical fiber preform, the reaction vessel comprises an inlet side and an outlet side arranged opposite to the inlet side, the reaction torch is arranged at the inlet side, and the outer diameter measuring instrument is arranged on the side wall of the reaction vessel.
In another aspect, the present invention provides a method for improving OVD deposition efficiency, comprising the steps of:
moving a reaction torch along the axial direction of the optical fiber preform and making the reaction flame sprayed out of the reaction torch go onto the optical fiber preform;
and simultaneously, compressing and guiding the reaction flame to the axial direction of the optical fiber perform rod by using a guiding device.
In some optional schemes, the compressing and guiding the reaction flame to the axial direction of the optical fiber preform by using a guiding device specifically includes:
the guide gas is sprayed out in a flat shape along a plane parallel to the axis of the optical fiber perform rod, and the guide gas is sprayed to a preset position all the time according to the diameter adjustment angle of the optical fiber perform rod, wherein the preset position is a tangent line of the optical fiber perform rod after the plane of the axis of the reaction blowlamp and the optical fiber perform rod is translated.
In some alternatives, the flow rate of the guide gas is adjusted in real time with the diameter of the optical fiber preform.
Compared with the prior art, the invention has the advantages that: the invention utilizes the flow guide device to compress and guide the reaction flame to the axial direction of the optical fiber perform rod while the reaction blast burner moves along the axial direction of the optical fiber perform rod, thus the reaction flame can be shaped, the reaction flame and the optical fiber perform rod have more contact areas, and the volume of the reaction gas deposited on the optical fiber perform rod is increased. The problem that the deposition efficiency is low because the diameter of the target rod is small in the early deposition stage and the area in contact with oxyhydrogen flame is small, and the generated glass particles cannot be effectively deposited on the target rod can be effectively solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention without a flow guide device;
FIG. 2 is a schematic structural diagram of an embodiment of the present invention after a flow guide device is installed;
FIG. 3 is a schematic diagram of an apparatus for improving OVD deposition efficiency in an embodiment of the present invention;
FIG. 4 is a schematic view of the angle adjustment of the air guide tube according to the embodiment of the present invention;
FIG. 5 is a diagram of an angle adjustment parameter of the draft tube according to an embodiment of the present invention.
In the figure: 1. a reaction blowtorch; 2. an optical fiber preform; 3. a flow guide device; 31. a diversion air pipe; 32. a nozzle; 4. an outer diameter measuring instrument; 5. a control unit; 6. a reaction vessel; 7. a deflection mechanism.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all 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 application.
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
As shown in fig. 2, the present invention provides an apparatus for improving OVD deposition efficiency, comprising: a deflector 3 and at least one reaction torch 1.
Wherein, the reaction blowtorch 1 can move along the axial direction of the optical fiber perform 2, is used for spouting the reaction flame to the optical fiber perform 2; the flow guiding device 3 is arranged outside the reaction blowtorch 1 and is used for compressing and guiding the reaction flame to the axial direction of the optical fiber perform 2.
When using this device that improves OVD deposition efficiency, make reaction blowtorch 1 along 2 axial displacements of optical fiber perform, and make its spun reaction flame to optical fiber perform 2 on, when reaction blowtorch 1 along 2 axial displacements of optical fiber perform, utilize guiding device 3 to react flame to 2 axial direction compression water conservancy diversion of optical fiber perform, can be like this with reaction flame "moulding", make reaction flame and optical fiber perform 2 have more area of contact, improve the volume of reaction gas deposit on optical fiber perform 2. The problem that the deposition efficiency is low because the diameter of the target rod is small in the early deposition stage and the area in contact with oxyhydrogen flame is small, and the generated glass particles cannot be effectively deposited on the target rod can be effectively solved.
In this example, the reaction flame includes an oxyhydrogen flame and a deposition gas (e.g., SiCl 4), and glass particles generated by chemical reaction with each other by the oxyhydrogen flame are deposited on the target rod. The optical fiber preform 2 is initially deposited as a target rod having a small diameter at the initial stage of deposition, and at this time, as shown in fig. 1, if the flow guide device 3 is not provided, the reaction flame emitted from the reaction torch 1 has a substantially circular shape, so that glass particles generated from the deposition gas in the reaction flame are deposited only after contacting the target rod in the circular region, which may cause a problem of low deposition efficiency. Adopt in this scheme to compress the water conservancy diversion with reaction flame to optical fiber perform 2's axial direction, can increase the area of contact of deposit gas and target bar in the reaction flame to improve deposition efficiency.
As shown in fig. 2 and 3, in some alternative embodiments, the guiding device 3 includes two guiding gas pipes 31 respectively disposed at two sides of the reaction torch 1 and located at two sides of the optical fiber preform 2, and the guiding gas pipes 31 are used for ejecting guiding gas to compress and guide the reaction flame to extend in the axial direction of the optical fiber preform 2.
In this embodiment, the reaction torch 1 is perpendicular to the initial deposition target rod, and the two gas guiding pipes 31 of the gas guiding device 3 are respectively located at two sides of the plane formed by the reaction torch 1 and the target rod, i.e. the optical fiber preform 2. That is, the guide gas pipes 31 are respectively disposed at both sides of the reaction torch 1, so that the circular reaction flame can be flattened, the reaction flame can extend in the axial direction of the optical fiber preform 2, and the reaction gas in the reaction flame and the optical fiber preform 2 have a larger contact area, thereby improving the reaction efficiency.
In some optional embodiments, the apparatus further comprises an outer diameter measuring instrument 4 and a control unit 5, wherein the outer diameter measuring instrument 4 is used for measuring the diameter of the optical fiber preform 2 in real time, and the control unit 5 is used for adjusting the direction of the guide gas ejected from the guide gas pipe 31 to be always ejected to the preset position according to the diameter detection signal of the outer diameter measuring instrument 4.
In this embodiment, as the optical fiber preform 2 is gradually deposited, its diameter is gradually increased, and in order to keep the contact area between the reaction flame and the optical fiber preform 2 at the maximum, the angle of the guiding gas pipe 31 needs to be adjusted in real time to adapt to the diameter of the optical fiber preform at this time. In this example, the direction of the guiding gas ejected from the guiding gas tube 31 is always the outer diameter of the optical fiber preform 2, even though the optical fiber preform 2 facing one side of the reaction torch 1 can be covered completely. In this embodiment, as the diameter of the optical fiber preform 2 gradually increases, the diameter of the optical fiber preform 2 is measured in real time by the outer diameter measuring instrument 4, the control unit 5 obtains a diameter signal detected by the outer diameter measuring instrument 4, and adjusts the direction of the guiding gas sprayed by the guiding gas pipe 31 to be always sprayed to a preset position, so that the optical fiber preform 2 facing one side of the reaction burner 1 can be completely covered, thereby ensuring that the contact area between the reaction flame and the optical fiber preform 2 is kept at the maximum, and ensuring the reaction efficiency.
In some alternative embodiments, the axial directions of the reaction torch 1 and the optical fiber preform 2 are perpendicular to each other, and the predetermined position is a tangent to the optical fiber preform 2 after the axial planes of the reaction torch 1 and the optical fiber preform 2 are translated.
In the present embodiment, the injection direction of the reaction torch 1 and the axial direction of the optical fiber preform 2 are perpendicular to each other, i.e., the nozzle of the reaction torch 1 is perpendicular to the axial direction of the optical fiber preform 2. Make the guiding gas spout all the time to the reaction blowtorch 1 with optical fiber perform 2 axis place plane translation back and optical fiber perform 2 tangent line position, can be the biggest with the optical fiber perform 2's of reaction flame orientation reaction face, be restricted on the biggest reaction face all the time to improve reaction efficiency. In addition, the nozzle 32 of the reaction torch 1 may be designed to have a flat structure to directly blow the reaction flame toward the axial direction of the optical fiber preform 2, but its diameter may increase as the optical fiber preform 2 is deposited. In this case, the nozzle 32 is designed to be wider, which results in waste of deposition gas in the initial deposition stage, but the nozzle is designed to be narrower, which results in an excessively small reaction area after the deposition diameter of the optical fiber preform 2 is increased. The nozzle 32 is designed to be variable in width and width, and is difficult to design, high in cost and poor in stability.
In some alternative embodiments, the nozzles 32 of the guiding gas tube 31 are flat, and are used for ejecting guiding gas in a flat shape along a plane parallel to the axis of the optical fiber preform 2.
In this embodiment, the flat nozzle 32 ejects the guiding gas in a flat shape along a plane parallel to the axis of the optical fiber preform 2, and the guiding gas is ejected to a tangential position of the optical fiber preform 2 after the plane of the reaction torch 1 and the axis of the optical fiber preform 2 are translated. Two gas walls are formed by the guide gas sprayed out of the two flat nozzles 32, and the reaction flame is guided and gathered, so that the glass particles formed by the reaction gas in the reaction flame are directly discharged after fully contacting and reacting with the loose body. This allows the reaction gas to be always located in the contact surface with the optical fiber preform 2 and keeps the reaction surface maximum. The flat nozzle 32 also makes the limiting length of the guiding gas in the length direction of the optical fiber preform 2 longer.
In some optional embodiments, the device further comprises a deflecting mechanism 7 in signal connection with the control unit 5, for adjusting the pilot gas ejected from the pilot gas tube 31 to be always ejected to the preset position according to the control signal received from the control unit 5.
In this embodiment, by disposing the guiding gas tube 31 on the deflecting mechanism 7 and connecting the deflecting mechanism 7 with the control unit 5, the deflecting mechanism 7 adjusts the guiding gas ejected from the guiding gas tube 31 to be always ejected to the preset position according to the control signal received from the control unit 5, specifically, according to the diameter signal of the optical fiber preform 2 acquired by the control unit 5, that is, the reaction gas is limited to be always located in the contact surface with the optical fiber preform 2 and the reaction surface is kept to be maximum. Thus, the automatic control of the angle of the diversion air pipe 31 is realized, and the working efficiency, the accuracy and the stability are improved. The deflection mechanism 7 can be a rotary servo motor as shown in fig. 2, is arranged at the outer side of the reaction blast lamp 1, is connected with the guide gas pipe 31, and directly drives the guide gas pipe 31 to deflect; as shown in fig. 3, the guide gas pipe 31 may be provided with a rotating portion rotatably connected to the outside of the reaction torch 1, the deflecting mechanism 7 may be a telescopic mechanism, one end of the deflecting mechanism is connected to one end of the nozzle 32 close to the guide gas pipe 31, and the other end of the deflecting mechanism is connected to the outside of the reaction torch 1, and the guide gas pipe 31 may be rotated by the telescopic mechanism, thereby adjusting the angle of the nozzle 32.
In some optional embodiments, the apparatus further comprises a reaction vessel 6 which is sleeved outside the optical fiber preform 2, the reaction vessel 6 comprises an inlet side and an outlet side arranged opposite to the inlet side, the reaction torch 1 is arranged at the inlet side, and the outer diameter measuring instrument 4 is arranged on the side wall of the reaction vessel 6.
In this example, the reaction vessel 6 is an elongated reaction chamber having an inlet side and an outlet side, and the inlet side and the outlet side are disposed opposite to each other to provide a reaction space for deposition of the optical fiber preform 2. The opening on the gas inlet side is larger than the opening on the gas outlet side, so that the reaction gas in the reaction container 6 can always keep higher reaction concentration. The outer diameter measuring instrument 4 is arranged on the side wall of the reaction container 6, and can more accurately detect the diameter of the optical fiber perform 2 in real time.
In another aspect, the present invention also provides a method for improving OVD deposition efficiency, comprising the steps of:
moving the reaction torch 1 along the axial direction of the optical fiber perform 2 which is gradually deposited, and making the reaction flame sprayed out onto the optical fiber perform 2; meanwhile, the reaction flame is compressed and guided to the axial direction of the optical fiber perform 2 by using the guiding device 3.
When the method is used, the reaction blowtorch 1 moves along the axial direction of the optical fiber prefabricated rod 2 which is gradually deposited, the reaction flame sprayed by the reaction blowtorch is enabled to be on the optical fiber prefabricated rod 2, when the diameter of the optical fiber prefabricated rod 2 of the reaction gas in the reaction flame is smaller, the reaction flame is compressed and guided to the axial direction of the optical fiber prefabricated rod 2 by the guide device 3, the reaction gas can have more contact area with the optical fiber prefabricated rod 2 with the smaller diameter at the moment, and therefore the deposition efficiency is improved. Since the number of glass particles remaining around the bulk deposited on the target rod is not large, abnormalities such as bright spots and foreign matter in the bulk are also improved.
In some alternative embodiments, the compressive guiding of the reaction flame toward the axial direction of the optical fiber preform 2 by using the guiding device 3 specifically includes: the plane that the guide gas is parallel along 2 axis of optical fiber perform is the platykurtic blowout to according to 2 diameter adjustment angle of optical fiber perform, make guide gas spout all the time to preset the position, preset the position for the tangent line of reacting blowtorch 1 and 2 optical fiber perform 2 behind the axis place plane translation with optical fiber perform 2.
In this example, before the start of deposition, a target rod having a diameter of about 40 to 50mm was installed in the middle of the reaction vessel. The deposition blowtorch is located at 90 degrees right below the axial direction of the target rod. As shown in fig. 4, the air guiding pipes for adjusting the shape of the reaction flame are located at two sides of the deposition burner and form an included angle of 45 degrees with the horizontal direction, respectively, nitrogen is used as the guiding gas (to prevent impurities from depositing on the surface of the loose body), and the initial flow is set to 10 slm/min. The flow and the spraying direction of the diversion gas are set to be adjusted by a control unit 5 (PLC), so that the diversion gas is always sprayed to the tangent line of the optical fiber perform 2 after the plane of the axes of the reaction blowlamp 1 and the optical fiber perform 2 is translated, the reaction gas is limited to be always positioned in the contact surface with the optical fiber perform 2, the reaction surface is kept to be the largest, and the working efficiency, the adjustment accuracy and the reaction stability can be improved.
In some alternative embodiments, the flow rate of the guide gas is adjusted in real time with the diameter of the optical fiber preform 2.
In this embodiment, as the deposition starts, the reaction torch 1 generates glass particles by introducing a reaction gas (for example, SiCl 4) into an oxyhydrogen flame. Glass particles are deposited on the surface of the target rod along with the oxyhydrogen flame. In the early stage of deposition, the flame is shaped under the action of the preset gas flow guide, and the glass particles in the oxyhydrogen flame can more fully contact the surface of the target rod, so that the deposition efficiency is improved.
Along with the continuous progress of deposition, the loose body of the optical fiber perform rod 2 gradually grows and becomes thicker under the accumulation of glass particles, meanwhile, the speed and the angle of gas diversion need to be continuously and synchronously adjusted, the angle of the gas diversion pipe gradually changes and is adjusted, and the gas flow rate also needs to be gradually increased. Therefore, the oxyhydrogen flame can be ensured to be fully contacted with the surface of the loose body along with the progress of deposition, and the deposition efficiency is improved.
The setting of the diversion angle and the gas flow of the diversion gas is obtained in a plurality of tests under the combination of actual conditions, and is designed into a corresponding program to be input into the control unit 5 (PLC) for control. In the whole deposition process, the change parameters of the diameter of the loose body in deposition are detected by an outer diameter measuring instrument, and the diversion angle and the gas flow rate set by a corresponding program are adjusted. Therefore, the correspondence relationship of the program control parameters is also the key point of the present invention.
The following table sets forth the key control parameters for the tuning procedure:
as shown in fig. 4 and 5, the key control parameters in the table above are explained in detail: when optical fiber perform's diameter was 40mm, was the target stick this moment, and the water conservancy diversion direction of water conservancy diversion gas is 45 jiaos for being the axis place plane with reaction blowtorch 1 and optical fiber perform 2, and the position that water conservancy diversion gas sprays on optical fiber perform 2 this moment is: the axial planes of the reaction blowtorch 1 and the optical fiber prefabricated rod 2 are translated and then tangent to the optical fiber prefabricated rod 2, and the flow of the guide gas is 10 slm/min. When the diameter of the optical fiber preform is 100, the diameter is adjusted to the position in the table, the gas flow is also set according to the parameters in the table, when the diameter of the optical fiber preform is 400mm, the flow guide direction of the flowing gas is 75 degrees with the plane where the axes of the reaction blowtorch 1 and the optical fiber preform 2 are located, and the flow of the flowing gas is 24 slm/min at the moment. The parameters of the key points are only given in the table, and the parameters of other points can be obtained according to the parameter difference in the table.
In summary, the reaction torch 1 moves along the axial direction of the optical fiber perform 2, and the flow guiding device 3 compresses and guides the reaction flame to the axial direction of the optical fiber perform 2, so that the reaction flame can be shaped, the reaction flame and the optical fiber perform 2 have more contact area, and the volume of the reaction gas deposited on the optical fiber perform 2 is increased. The problem that the deposition efficiency is low because the diameter of the target rod is small in the early deposition stage and the area in contact with oxyhydrogen flame is small, and the generated glass particles cannot be effectively deposited on the target rod can be effectively solved. Still according to the optical fiber perform 2 diameter signal that the control unit 5 obtained, the guiding gas of adjustment guiding gas pipe 31 spun spouts to predetermineeing the position all the time, and restriction reaction gas is located the contact surface with optical fiber perform 2 all the time promptly to keep the reaction surface maximum. Thus, the automatic control of the angle of the diversion air pipe 31 is realized, and the working efficiency, the accuracy and the stability are improved.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. An apparatus for improving OVD deposition efficiency, comprising:
at least one reaction torch (1) movable in the axial direction of the optical fiber preform (2), the reaction torch (1) being adapted to eject a reaction flame to the optical fiber preform (2);
the flow guide device (3) is arranged on the outer side of the reaction blowtorch (1) and is used for compressing and guiding the reaction flame to the axial direction of the optical fiber perform rod (2);
the flow guide device (3) comprises two flow guide gas pipes (31) which are respectively arranged on two sides of the reaction blowtorch (1) and located on two sides of the optical fiber perform rod (2), wherein the flow guide gas pipes (31) are used for ejecting flow guide gas to compress and guide the reaction flame, so that the reaction flame extends towards the axial direction of the optical fiber perform rod (2).
2. The apparatus for improving OVD deposition efficiency according to claim 1, further comprising an outer diameter measuring instrument (4) and a control unit (5), wherein the outer diameter measuring instrument (4) is used for measuring the diameter of the optical fiber preform (2) in real time, and the control unit (5) is used for adjusting the direction of the guiding gas ejected from the guiding gas pipe (31) to always eject the guiding gas to a preset position according to a diameter detection signal of the outer diameter measuring instrument (4).
3. The apparatus for improving OVD deposition efficiency according to claim 2, wherein the axial directions of the reaction torch (1) and the optical fiber preform (2) are perpendicular to each other, and the predetermined position is a tangent to the optical fiber preform (2) after the axial planes of the reaction torch (1) and the optical fiber preform (2) are translated.
4. An apparatus for improving OVD deposition efficiency as claimed in any one of claims 1 to 3, wherein the nozzles (32) of said guiding gas tube (31) are flat for ejecting said guiding gas along a plane parallel to the axis of said optical fiber preform (2).
5. The apparatus for improving OVD deposition efficiency according to claim 2, further comprising a deflection mechanism (7) in signal communication with said control unit (5) for adjusting the pilot gas from said pilot gas tube (31) to be always directed to a predetermined position according to a control signal received from said control unit (5).
6. The apparatus for improving OVD deposition efficiency according to claim 2, further comprising a reaction vessel (6) surrounding the optical fiber preform (2), wherein the reaction vessel (6) comprises an inlet side and an outlet side disposed opposite to the inlet side, the reaction torch (1) is disposed at the inlet side, and the outer diameter measuring instrument (4) is disposed at a sidewall of the reaction vessel (6).
7. A method of increasing OVD deposition efficiency, comprising the steps of:
moving a reaction blast burner (1) along the axial direction of an optical fiber preform (2) and spraying reaction flame onto the optical fiber preform (2);
meanwhile, two diversion gas pipes (31) of the diversion device (3) are used for jetting diversion gas to compress and divert the reaction flame, so that the reaction flame extends towards the axial direction of the optical fiber perform rod (2), wherein the two diversion gas pipes (31) are respectively arranged at two sides of the reaction blowtorch (1) and are positioned at two sides of the optical fiber perform rod (2).
8. The method for improving OVD deposition efficiency according to claim 7, wherein the injecting the guiding gas by two guiding gas pipes (31) of the guiding device (3) to compress and guide the reaction flame to extend toward the axial direction of the optical fiber preform (2), comprises:
the guide gas is sprayed out in a flat shape along the plane parallel to the axis of the optical fiber perform rod (2), and the guide gas is sprayed to a preset position all the time according to the diameter adjustment angle of the optical fiber perform rod (2), and the preset position is the tangent line of the optical fiber perform rod (2) after the plane of the axis of the reaction blowtorch (1) and the optical fiber perform rod (2) is translated.
9. The method for improving OVD deposition efficiency according to claim 8, wherein the flow rate of the guiding gas is adjusted in real time with the diameter of the optical fiber preform (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110772121.8A CN113213753B (en) | 2021-07-08 | 2021-07-08 | Device and method for improving OVD (over-the-counter) deposition efficiency |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110772121.8A CN113213753B (en) | 2021-07-08 | 2021-07-08 | Device and method for improving OVD (over-the-counter) deposition efficiency |
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| Publication Number | Publication Date |
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| CN113213753A CN113213753A (en) | 2021-08-06 |
| CN113213753B true CN113213753B (en) | 2021-09-21 |
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| JPH07144928A (en) * | 1993-11-24 | 1995-06-06 | Yazaki Corp | Production of optical fiber preform and device therefor |
| CN205590562U (en) * | 2016-05-06 | 2016-09-21 | 藤仓烽火光电材料科技有限公司 | Optical fiber perform deposit preparation facilities |
| CN206232607U (en) * | 2016-11-25 | 2017-06-09 | 江苏奥维信亨通光学科技有限公司 | A kind of plug extends laterally processing blowtorch |
| CN109437545A (en) * | 2018-11-26 | 2019-03-08 | 于佳 | A kind of plug is laterally extended processing blowtorch |
| CN110395899A (en) * | 2019-08-02 | 2019-11-01 | 杭州永特信息技术有限公司 | A kind of preparation method and its prefabricated rods surrounding layer of high deposition rate preform surrounding layer |
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| JPH07144928A (en) * | 1993-11-24 | 1995-06-06 | Yazaki Corp | Production of optical fiber preform and device therefor |
| CN205590562U (en) * | 2016-05-06 | 2016-09-21 | 藤仓烽火光电材料科技有限公司 | Optical fiber perform deposit preparation facilities |
| CN206232607U (en) * | 2016-11-25 | 2017-06-09 | 江苏奥维信亨通光学科技有限公司 | A kind of plug extends laterally processing blowtorch |
| CN109437545A (en) * | 2018-11-26 | 2019-03-08 | 于佳 | A kind of plug is laterally extended processing blowtorch |
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