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CN109721237A - The production technology and its preform of preform - Google Patents

The production technology and its preform of preform Download PDF

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Publication number
CN109721237A
CN109721237A CN201910128912.XA CN201910128912A CN109721237A CN 109721237 A CN109721237 A CN 109721237A CN 201910128912 A CN201910128912 A CN 201910128912A CN 109721237 A CN109721237 A CN 109721237A
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CN
China
Prior art keywords
connecting rod
mandrel
hinged
optical fiber
heating
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Granted
Application number
CN201910128912.XA
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Chinese (zh)
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CN109721237B (en
Inventor
王醒东
杨军勇
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Hangzhou Futong Communication Technology Co Ltd
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Tianjin Fortis Group Co Ltd
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Priority to CN201910128912.XA priority Critical patent/CN109721237B/en
Publication of CN109721237A publication Critical patent/CN109721237A/en
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Publication of CN109721237B publication Critical patent/CN109721237B/en
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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
    • 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
    • C03B37/01815—Reactant deposition burners or deposition heating means
    • 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
    • C03B37/01861—Means for changing or stabilising the diameter or form of tubes or rods
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
    • Y02P40/57—Improving the yield, e-g- reduction of reject rates

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  • Chemical & Material Sciences (AREA)
  • 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)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Abstract

The invention discloses a kind of production technologies of preform, comprising the following steps: 1) plug deposition procedures；2) vitrifying process；3) the thick extension process first stage；4) thick extension process second stage；5) the thick extension process phase III；If assisted heating device includes a pair of expansion hinge frame, push rod and each heat-generating wires being arranged in juxtaposition in step 3) and step 5)；The expansion hinge frame includes first connecting rod, second connecting rod, third connecting rod, fourth link, the 5th connecting rod and six-bar linkage；Heat-generating wires are arc coil, and neighbouring heat-generating wires are connected by elastic conducting strip；Push rod drives the expansion of expansion hinge frame or shrinks；Positive pole and cathode are separately connected on heat-generating wires.The present invention is solved existing preform in extension process and the biggish defect of the size of each part difference is occurred using a kind of completely new production technology and ancillary heating equipment.

Description

The production technology and its preform of preform
The application be on February 15th, 2017, application No. is 201710081160.7, entitled " big ruler the applying date The divisional application of the production technology and its large-scale optical fiber prefabricating stick of very little preform ".
Technical field
The present invention relates to preform production fields, and in particular to a kind of production technology of large-scale optical fiber prefabricating stick.
Background technique
Preform is the core starting materials for manufacturing quartzy series fibre.The internal structure of optical fiber is exactly in prefabricated rods It is formed, thus the production of prefabricated rods is most important part in optical fiber fabrication technology.There are many methods for the production of preform, often Manufacture craft is vapour phase oxidation process.In vapour phase oxidation process, the steam and oxygen of high-purity halide react, and are formed Some oxide fine particles, these oxide fine particles can be deposited on the surface of glass or quartz body (or inner wall of tubular body), Then transparent glass bar is formed by sintering.
In order to there is a higher deposition rate, prefabricated rods preparation, which is generally all taken, first prepares large-sized plug, then by plug Draw and attenuate, then outside plug redeposited covering method.During stretching, plug rises the plug of large-scale optical fiber prefabricating stick Diameter is less than normal after beginning drawn；At the end of stretching, the melting of plug tail end is insufficient, causes the section diameter bigger than normal.Plug is straight The lesser part of diameter, usually removes in actual use process and does not have to, product is caused to waste, and cost improves.
Summary of the invention
The present invention solves existing big in view of the above-mentioned problems, proposing a kind of production technology of large-scale optical fiber prefabricating stick The production technology of size fibers prefabricated rods is easy to appear the non-uniform defect of size of prefabricated rods.
The technical solution adopted by the present invention is as follows:
A kind of production technology of large-scale optical fiber prefabricating stick, comprising the following steps:
1) plug deposition procedures: on core rod lathe, being passed through silicon tetrachloride, hydrogen and oxygen in oxygen-hydrogen torch, carries out Deposition sintering, the silicon dioxide microparticle of generation are attached to formation plug matrix on kind of stick；It is deposited in plug base end sintered Journey, the rate promoted by reducing kind of stick, so that the plug base end outer diameter of 10mm~20mm length is greater than other parts 6mm ~10mm；
2) vitrifying process: obtained plug matrix obtains glass in 1800 DEG C~2000 DEG C of at a temperature of melting dehydration The plug of change；
3) the thick extension process first stage: vitrified plug being transferred in high temperature furnace and heats extension, the high temperature furnace Temperature is controlled at 2000 DEG C~2200 DEG C, protrudes into assisted heating device to plug overstriking region, so that the temperature in plug overstriking region Degree is more than 2300 DEG C；Further heating extends, and control return air wind speed is 10~15cm/s；
4) thick extension process second stage: moving assisted heating device, and high temperature furnace controls temperature at 2000 DEG C~2200 DEG C, Further heating extends, and control return air wind speed is 20~25cm/s；
5) the thick extension process phase III: high temperature furnace controls temperature at 2100 DEG C~2300 DEG C, and further heating extends, control Return air wind speed processed is 30cm/s~35cm/s；Assisted heating device to plug far from overstriking region one end so that in local temperature It rises more than 2300 DEG C；It is cooling after extension, be made the overstriking area outer diameter of plug compared with the big 3mm of plug central region outer diameter~ 4mm；
Assisted heating device described in the step 3) and step 5) include a pair of expansion hinge frame being arranged in juxtaposition, push rod and Several heat-generating wires；
The expansion hinge frame includes first connecting rod, second connecting rod, third connecting rod, fourth link, the 5th connecting rod and the 6th company Bar；Described first connecting rod one end is fixedly connected with push rod, the hinged heat-generating wires of the other end；The second connecting rod, which is fixedly connected, to be pushed away Bar, the hinged heat-generating wires of the other end；Cross-articulation in the middle part of the first connecting rod and second connecting rod；Third connecting rod one end hinge At the tie point for connecing first connecting rod and heat-generating wires, the hinged heat-generating wires of the other end；The fourth link hinged second connects At the tie point of bar and heat-generating wires, the hinged heat-generating wires of the other end；Intersect in the middle part of the third connecting rod and fourth link Hingedly；At the tie point of the hinged third connecting rod in described 5th connecting rod one end and heat-generating wires, the hinged heat-generating wires of the other end； At the tie point of the hinged fourth link of the six-bar linkage and heat-generating wires, the hinged heat-generating wires of the other end；Described 5th Cross-articulation in the middle part of connecting rod and six-bar linkage；The heat-generating wires are arc coil, and neighbouring heat-generating wires pass through Elastic conducting strip is connected；
Push rod connects the other end of first connecting rod or second connecting rod far from third connecting rod or fourth link；The push rod driving The expansion of expansion hinge frame is shunk；Be separately connected on the heat-generating wires being connected with first connecting rod or second connecting rod power supply anode and Cathode.
A kind of production technology of large-scale optical fiber prefabricating stick of the invention is in plug deposition procedures, so that plug base end The outer diameter of 10mm~20mm length is greater than other parts 6mm~10mm, compensates for the starting point that subsequent extension process is easy to appear Diameter reduction.Thick extension process is separated into three different stages simultaneously, is regulated and controled respectively, the first stage is used Assisted heating device compensates formula heating, so that the temperature of initial end is higher, faster, heat passes more rapidly heat transfer It is handed to matrix inner core；The process stretched when so that initial is rapider, reduces the reduction of diameter and reduces possible waste.Then Assisted heating device is used by the phase III, compensates the heat of stage loss, and increases the circulation of hot gas, so that heat passes It passs more evenly, reduces the larger-size defect of prefabricated rods extending end.Assisted heating device thermal-stable in the present invention leads to Overregulate push rod can spacing between regulation heating wire, and then adjust the temperature of heating and the range of heating region, Its is easy to operate.
Optionally, in the step 3), expansion hinge frame is in contraction state, so that upper between several heat-generating wires Lower spacing is smaller.Between heat-generating wires between the upper and lower away from smaller so that heat is more concentrated, faster, heat is more for heating temperature speed Add and is transferred to matrix inner core rapidly.
Optionally, in the step 5), expansion hinge frame is in expansion state, so that upper between several heat-generating wires Lower spacing is bigger.Between heat-generating wires between the upper and lower away from larger so that heat is uniformly dispersed.
Optionally, the production technology of the large-scale optical fiber prefabricating stick further includes that pre- essence prolongs process；The pre- essence prolongs process: Plug overstriking region is carried out heating accurate extension, so that the overstriking area outer diameter of plug is small compared with plug central region outer diameter difference In or equal to 2mm；The pre- essence is prolonged process and is in after the thick extension process phase III.It is prefabricated to obtaining that process is prolonged using pre- essence The thicker part of stick part point is extended in advance, the accurate control extended convenient for subsequent fine extension process equal proportion.
Optionally, the elastic conducting strip uses high temperature resistant conductive exothermal wire same as heat-generating wires.
Optionally, the assisted heating device further includes driving motor and control unit, and described control unit is electrically connected Driving motor, for the driving motor tool there are four pull rod, four pull rods are separately connected four push rods, and the driving motor driving is drawn Bar movement, and then drive push rod horizontal movement.
The invention also discloses a kind of large-scale optical fiber prefabricating stick, the large-scale optical fiber prefabricating stick utilizes above-mentioned large scale Preform technique is made.
The beneficial effects of the present invention are: a kind of production technology of large-scale optical fiber prefabricating stick of the invention deposits work in plug Sequence compensates for subsequent extended so that the outer diameter of plug base end 10mm~20mm length is greater than other parts 6mm~10mm The reduction of the diameter for the starting point that journey is easy to appear.Thick extension process is separated into three different stages simultaneously, is carried out respectively Regulation uses assisted heating device to the first stage, compensates formula heating, so that the temperature of initial end is higher, heat transfer Faster, the process stretched when so that initial is rapider, reduces the reduction of diameter and reduces possible waste.Then pass through third Stage uses assisted heating device, compensates the heat of stage loss, and increases the circulation of hot gas, so that heat transfer is more equal It is even, reduce the larger-size defect of prefabricated rods extending end.Assisted heating device thermal-stable in the present invention, passes through adjusting Push rod can spacing between regulation heating wire, and then adjust the temperature of heating and the range of heating region, operation It is easy.
In addition, expansion hinge frame is in contraction state so that between several heat-generating wires between the upper and lower away from smaller.Fever Between wire between the upper and lower away from smaller so that heat is more concentrated, faster, heat is transferred to more rapidly base to heating temperature speed Internal core.Expansion hinge frame is in expansion state so that between several heat-generating wires between the upper and lower away from bigger.Heat-generating wires Between between the upper and lower away from larger so that heat is uniformly dispersed.Thicker part point of the process to the part for obtaining prefabricated rods is prolonged using pre- essence Extended in advance, the accurate control extended convenient for subsequent fine extension process equal proportion.
Detailed description of the invention:
Fig. 1 is the technological process of production schematic diagram of large-scale optical fiber prefabricating stick of the present invention；
Fig. 2 is the assisted heating device structural schematic diagram of the production technology of large-scale optical fiber prefabricating stick；
Fig. 3 is expansion hinge frame structural schematic diagram in the assisted heating device of the production technology of large-scale optical fiber prefabricating stick；
Fig. 4 is that the assisted heating device of the production technology of large-scale optical fiber prefabricating stick matches structural representation with prefabricated rods Figure.
Each appended drawing reference in figure are as follows:
1, expansion hinge frame；2, push rod；3, heat-generating wires；4, first connecting rod；5, second connecting rod；6, third connecting rod；7, Double leval jib；8, the 5th connecting rod；9, six-bar linkage；10, elastic conducting strip；12, pull rod；14, control unit；15, high temperature furnace.
Specific embodiment:
Below with reference to each attached drawing, the present invention will be described in detail.
It is 120mm prefabricated rods or larger-sized prefabricated rods that signified large scale, which refers generally to diameter, in the present invention.
The invention discloses a kind of large-scale optical fiber prefabricating stick, the large-scale optical fiber prefabricating stick utilizes above-mentioned large scale light Fine prefabricated rods technique is made.
Embodiment one: the invention also discloses a kind of production technology of large-scale optical fiber prefabricating stick (see attached drawings 1), including with Lower step:
1) plug deposition procedures: on core rod lathe, being passed through silicon tetrachloride, hydrogen and oxygen in oxygen-hydrogen torch, carries out Deposition sintering, the silicon dioxide microparticle of generation are attached to formation plug matrix on kind of stick；It is deposited in plug base end sintered Journey, the rate promoted by reducing kind of stick, so that the outer diameter of plug base end 10mm length is greater than other parts 6mm；
2) vitrifying process: obtained plug matrix obtains vitrified plug in 1800 DEG C of at a temperature of melting dehydration；
3) the thick extension process first stage: vitrified plug being transferred in high temperature furnace 15 and heats extension, high temperature furnace 15 Temperature is controlled at 2000 DEG C, protrudes into assisted heating device to plug overstriking region, so that the temperature in plug overstriking region is 2300 ℃；Further heating extends, and control return air wind speed is 10cm/s；
4) thick extension process second stage: moving assisted heating device, and high temperature furnace 15 controls temperature at 2000 DEG C, further Heating extends, and control return air wind speed is 20cm/s；
5) the thick extension process phase III: high temperature furnace 15 controls temperature at 2100 DEG C, and further heating extends, and controls return air Wind speed is 30cm/s；Assisted heating device to plug far from overstriking region one end so that local temperature is increased beyond 2300 DEG C；Prolong It is cooling after stretching, the overstriking area outer diameter of plug is made compared with the big 3mm of plug central region outer diameter；
6) pre- essence prolongs process: plug overstriking region is carried out heating accurate extension so that the overstriking area outer diameter of plug compared with Plug central region outer diameter difference is equal to 2mm.
Embodiment two: the invention also discloses a kind of production technologies of large-scale optical fiber prefabricating stick, comprising the following steps:
1) plug deposition procedures: on core rod lathe, being passed through silicon tetrachloride, hydrogen and oxygen in oxygen-hydrogen torch, carries out Deposition sintering, the silicon dioxide microparticle of generation are attached to formation plug matrix on kind of stick；It is deposited in plug base end sintered Journey, the rate promoted by reducing kind of stick, so that the outer diameter of plug base end 20mm length is greater than other parts 10mm；
2) vitrifying process: obtained plug matrix obtains vitrified plug in 2000 DEG C of at a temperature of melting dehydration；
3) the thick extension process first stage: vitrified plug is transferred in high temperature furnace and heats extension, high temperature furnace 15 is controlled Temperature processed protrudes into assisted heating device to plug overstriking region, so that the temperature in plug overstriking region is 2300 DEG C at 2200 DEG C； Further heating extends, and control return air wind speed is 15cm/s；
4) thick extension process second stage: moving assisted heating device, and high temperature furnace 15 controls temperature at 2200 DEG C, further Heating extends, and control return air wind speed is 25cm/s；
5) the thick extension process phase III: high temperature furnace 15 controls temperature 2300, and further heating extends, and controls return air wind Speed is 35cm/s；Assisted heating device to plug far from overstriking region one end so that local temperature is increased beyond 2300 DEG C；Extend After, it is cooling, the overstriking area outer diameter of plug is made compared with the big 4mm of plug central region outer diameter；
6) pre- essence prolongs process: plug overstriking region is carried out heating accurate extension so that the overstriking area outer diameter of plug compared with Plug central region outer diameter difference is equal to 2mm.
In the step 3), expansion hinge frame 1 is in contraction state, so that between several heat-generating wires 3 between the upper and lower Away from smaller.Between heat-generating wires 3 between the upper and lower away from smaller so that heat is more concentrated, faster, heat is more for heating temperature speed Add and is transferred to matrix inner core rapidly.
In the step 5), expansion hinge frame 1 is in expansion state, so that between several heat-generating wires 3 between the upper and lower Away from bigger.Between heat-generating wires 3 between the upper and lower away from larger so that heat is uniformly dispersed.
A kind of production technology of large-scale optical fiber prefabricating stick of the invention is in plug deposition procedures, so that plug base end The outer diameter of 10mm~20mm length is greater than other parts 6mm~10mm, compensates for the starting point that subsequent extension process is easy to appear Diameter reduction.Thick extension process is separated into three different stages simultaneously, is regulated and controled respectively, the first stage is used Assisted heating device compensates formula heating, so that the temperature of initial end is higher, faster, heat passes more rapidly heat transfer It is handed to matrix inner core；The process stretched when so that initial is rapider, reduces the reduction of diameter and reduces possible waste.Then Assisted heating device is used by the phase III, compensates the heat of stage loss, and increases the circulation of hot gas, so that heat passes It passs more evenly, reduces the larger-size defect of prefabricated rods extending end.
The invention discloses a kind of assisted heating device (see attached drawing 2,3,4), the assisted heating device include it is a pair of simultaneously Arrange expansion hinge frame 1, push rod 2 and several heat-generating wires 3 of arrangement；
The expansion hinge frame 1 includes first connecting rod 4, second connecting rod 5, third connecting rod 6, fourth link 7,8 and of the 5th connecting rod Six-bar linkage 9；Described 4 one end of first connecting rod is fixedly connected with push rod 2, the hinged heat-generating wires 3 of the other end；The second connecting rod 5 It is fixedly connected with push rod 2, the hinged heat-generating wires 3 of the other end；5 middle part cross-articulation of the first connecting rod 4 and second connecting rod；It is described At the tie point of the hinged first connecting rod 4 in 6 one end of third connecting rod and heat-generating wires 3, the hinged heat-generating wires 3 of the other end；It is described At the tie point of the hinged second connecting rod 5 of fourth link 7 and heat-generating wires 3, the hinged heat-generating wires 3 of the other end；The third 7 middle part cross-articulation of connecting rod 6 and fourth link；The company of 5th connecting rod, 8 one end hinged third connecting rod 6 and heat-generating wires 3 Junction, the hinged heat-generating wires 3 of the other end；The tie point of the six-bar linkage 9 hinged fourth link 7 and heat-generating wires 3 Place, the hinged heat-generating wires 3 of the other end；5th connecting rod 8 and 9 middle part cross-articulation of six-bar linkage；The heat-generating wires 3 For arc coil, neighbouring heat-generating wires 3 are connected by elastic conducting strip 10；
Push rod 2 connects the other end of first connecting rod 4 or second connecting rod 5 far from third connecting rod 6 or fourth link 7；It is described to push away Bar 2 drives the expansion of expansion hinge frame 1 or shrinks；It is separately connected on the heat-generating wires 3 being connected with first connecting rod 4 or second connecting rod 5 The anode and cathode of power supply.
Assisted heating device thermal-stable in the present invention, by adjust push rod 2 can regulation heating wire 3 it Between spacing, and then adjust heating temperature and heating region range, it is easy to operate.
The production technology of the large-scale optical fiber prefabricating stick further includes that pre- essence prolongs process；The pre- essence prolongs process: to plug Overstriking region carries out heating accurate extension, so that the overstriking area outer diameter of plug is equal to 2mm compared with plug central region outer diameter difference； The pre- essence is prolonged process and is in after the thick extension process phase III.Process is prolonged to obtaining the relatively thick of prefabricated rods part using pre- essence Part is extended in advance, the accurate control extended convenient for subsequent fine extension process equal proportion.
The elastic conducting strip 10 uses high temperature resistant conductive exothermal wire 3 same as heat-generating wires 3.
The assisted heating device further includes driving motor and control unit 14, and described control unit 14 is electrically connected driving Motor, for the driving motor tool there are four pull rod 12, four pull rods 12 are separately connected four push rods 2, the driving motor driving Pull rod 12 moves, and then drives 2 horizontal movement of push rod.
Control unit 14 in the present embodiment is computer system.Heat-generating wires 3 and elastic conducting strip 10 in the present invention Tungsten wire can be used.Refractory ceramics, such as boron nitride ceramics can be used in expansion hinge frame 1.
When the present invention is implemented, the production technology of large-scale optical fiber prefabricating stick is planted, using following steps:
1) on core rod lathe, silicon tetrachloride, hydrogen and oxygen are passed through in oxygen-hydrogen torch, it is raw after carrying out deposition sintering It is attached on kind of stick at silicon dioxide microparticle, forms plug matrix；Sintering process is deposited in plug base end, by reducing kind The rate that stick is promoted, so that the outer diameter of plug base end 10mm length is greater than other parts 6mm；2) the plug matrix obtained Dehydration is melted at a temperature of 1800 DEG C, vitrifying obtains vitrified plug；3) vitrified plug is transferred in high temperature furnace Heating extends, and high temperature furnace controls temperature at 2000 DEG C, protrudes into assisted heating device to plug overstriking region, so that plug widening area The temperature in domain is 2300 DEG C；Further heating extends, and control return air wind speed is 10cm/s；4) move assisted heating device, high temperature Furnace controls temperature at 2000 DEG C, and further heating extends, and control return air wind speed is 20cm/s；5) high temperature furnace controls temperature 2100 DEG C, further heating extends, and control return air wind speed is 30cm/s；Assisted heating device, far from overstriking region one end, makes to plug It obtains local temperature and is increased beyond 2300 DEG C；It is cooling after extension, the overstriking area outer diameter of plug is made compared with plug central region The big 3mm of outer diameter；6) the pre- essence prolongs process: carrying out heating accurate extension to plug overstriking region, so that the overstriking region of plug Outer diameter is equal to 2mm compared with plug central region outer diameter difference.
The above description is only a preferred embodiment of the present invention, not thereby limits scope of patent protection of the invention, all It is directly or indirectly to be used in other relevant technologies with equivalent structure transformation made by description of the invention and accompanying drawing content Field similarly includes within the scope of the present invention.

Claims (8)

1.一种光纤预制棒的生产工艺，其特征在于，包括以下步骤：1. a production technique of optical fiber preform, is characterized in that, comprises the following steps: 1)芯棒沉积工序：在芯棒车床上，通过氢氧喷灯进行沉积烧结，生成的二氧化硅微粒附着在种棒上形成芯棒基体；在芯棒基体末端沉积烧结过程，通过降低种棒提升的速率，使得芯棒基体末端外径大于其他部分；1) Mandrel deposition process: On the mandrel lathe, deposition and sintering are carried out by a hydrogen-oxygen torch, and the generated silica particles are attached to the seed rod to form the mandrel matrix; the process of depositing and sintering at the end of the mandrel matrix, by reducing the seed rod The rate of lifting makes the outer diameter of the base end of the mandrel larger than other parts; 2)玻璃化工序：对得到的芯棒进行熔融脱水操作，得到玻璃化的芯棒；2) vitrification process: the obtained mandrel is subjected to a melting and dehydration operation to obtain a vitrified mandrel; 3)粗延伸工序第一阶段：将玻璃化的芯棒转移至高温炉中加热延伸，所述高温炉控制温度在2000℃～2200℃，并伸入辅助加热装置至芯棒加粗区域，使得芯棒加粗区域的温度超过2300℃；进一步加热延伸，控制回风风速为10cm/s～15cm/s；3) The first stage of the rough extension process: transfer the vitrified mandrel to a high-temperature furnace for heating and elongation. The temperature of the thickened area of the mandrel rod exceeds 2300 °C; further heating and extension, control the return air speed to 10cm/s ~ 15cm/s; 4)粗延伸工序第二阶段：移掉辅助加热装置，高温炉控制温度在2000℃～2200℃，进一步加热延伸，控制回风风速为20cm/s～25cm/s；4) The second stage of the rough extension process: remove the auxiliary heating device, control the temperature of the high temperature furnace at 2000 ℃～2200 ℃, further heat and extend, and control the return air speed to be 20cm/s～25cm/s; 5)粗延伸工序第三阶段：高温炉控制温度在2100℃～2300℃，进一步加热延伸，控制回风风速为30cm/s～35cm/s；辅助加热装置至芯棒远离加粗区域一端，使得局部温度上升超过2300℃；延伸结束后，冷却，制得芯棒的加粗区域外径较芯棒中部区域外径大；5) The third stage of the rough extension process: the high temperature furnace controls the temperature at 2100 ℃ ~ 2300 ℃, further heating and extending, and controls the return air speed to be 30cm/s ~ 35cm/s; the auxiliary heating device is to the end of the mandrel away from the thickened area, so that The local temperature rises more than 2300 °C; after the extension is completed, it is cooled, and the outer diameter of the thickened area of the mandrel is larger than the outer diameter of the middle area of the mandrel; 所述步骤3)和步骤5)中所述辅助加热装置包括一对并列布置的伸缩铰架、推杆和若干个发热金属丝；In the steps 3) and 5), the auxiliary heating device includes a pair of parallelly arranged telescopic hinges, a push rod and several heating wires; 所述伸缩铰架包括第一连杆、第二连杆、第三连杆、第四连杆、第五连杆和第六连杆；所述第一连杆一端固定连接推杆，另一端铰接发热金属丝；所述第二连杆固定连接推杆，另一端铰接发热金属丝；所述第一连杆和第二连杆中部交叉铰接；所述第三连杆一端铰接第一连杆与发热金属丝的连接点处，另一端铰接发热金属丝；所述第四连杆铰接第二连杆与发热金属丝的连接点处，另一端铰接发热金属丝；所述第三连杆和第四连杆中部交叉铰接；所述第五连杆一端铰接第三连杆与发热金属丝的连接点处，另一端铰接发热金属丝；所述第六连杆铰接第四连杆与发热金属丝的连接点处，另一端铰接发热金属丝；所述第五连杆和第六连杆中部交叉铰接；所述发热金属丝为弧形线圈，上下相邻的发热金属丝通过弹性导电片相连；The telescopic hinge includes a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a fifth connecting rod and a sixth connecting rod; one end of the first connecting rod is fixedly connected to the push rod, and the other end is connected to the push rod. Hinged heating wire; the second connecting rod is fixedly connected to the push rod, and the other end is hinged with the heating wire; the middle of the first connecting rod and the second connecting rod are cross-hinged; one end of the third connecting rod is hinged with the first connecting rod At the connection point with the heating wire, the other end is hinged with the heating wire; the fourth link is hinged at the connection point between the second link and the heating wire, and the other end is hinged with the heating wire; the third link and the The middle part of the fourth connecting rod is cross-hinged; one end of the fifth connecting rod is hinged to the connection point of the third connecting rod and the heating wire, and the other end is hinged to the heating wire; the sixth connecting rod is hinged to the fourth connecting rod and the heating metal wire. At the connection point of the wire, the other end is hinged with the heating wire; the middle of the fifth connecting rod and the sixth connecting rod are cross hinged; the heating wire is an arc coil, and the adjacent heating wires are connected by elastic conductive sheets. ; 推杆连接第一连杆或第二连杆远离第三连杆或第四连杆的另一端；所述推杆驱动伸缩铰架展开或收缩；与第一连杆或第二连杆相连的发热金属丝上分别连接电源的正极和负极。The push rod is connected to the other end of the first link or the second link away from the third link or the fourth link; the push rod drives the telescopic hinge to expand or contract; the push rod is connected to the first link or the second link The positive and negative electrodes of the power supply are respectively connected to the heating wire. 2.如权利要求1所述的光纤预制棒的生产工艺，其特征在于，步骤1)中，使得10mm～20mm长度的芯棒基体末端外径大于其他部分6mm～10mm；步骤2)中，芯棒基体在1800℃～2000℃的温度下熔融脱水；步骤5)中，制得芯棒的加粗区域外径较芯棒中部区域外径大3mm～4mm。2. The production process of an optical fiber preform according to claim 1, wherein in step 1), the outer diameter of the base end of the mandrel with a length of 10mm to 20mm is larger than that of other parts by 6mm to 10mm; in step 2), the core The rod matrix is melted and dehydrated at a temperature of 1800°C to 2000°C; in step 5), the outer diameter of the thickened region of the obtained mandrel is 3 mm to 4 mm larger than the outer diameter of the middle region of the mandrel. 3.如权利要求1所述的光纤预制棒的生产工艺，其特征在于，所述步骤3)中，伸缩铰架处于收缩状态，使得若干个发热金属丝之间的上下间距更小。3 . The production process of the optical fiber preform according to claim 1 , wherein, in the step 3), the telescopic hinge is in a retracted state, so that the upper and lower distances between several heating wires are smaller. 4 . 4.如权利要求1所述的光纤预制棒的生产工艺，其特征在于，所述步骤5)中，伸缩铰架处于扩张状态，使得若干个发热金属丝之间的上下间距更大。4 . The production process of the optical fiber preform according to claim 1 , wherein, in the step 5), the telescopic hinge is in an expanded state, so that the upper and lower distances between several heating wires are larger. 5 . 5.如权利要求3所述的光纤预制棒的生产工艺，其特征在于，还包括预精延工序；所述预精延工序：对芯棒加粗区域进行加热精确延伸，使得芯棒的加粗区域外径较芯棒中部区域外径差值小于或等于2mm；所述预精延工序处于粗延伸工序第三阶段之后。5 . The production process of an optical fiber preform according to claim 3 , further comprising a pre-finishing process; the pre-finishing process: heating and accurately extending the thickened area of the mandrel, so that the thickness of the mandrel is extended. 6 . The difference between the outer diameter of the rough region and the outer diameter of the middle region of the mandrel is less than or equal to 2 mm; the pre-finishing process is after the third stage of the rough stretching process. 6.如权利要求1所述的光纤预制棒的生产工艺，其特征在于，所述弹性导电片采用与发热金属丝同样的耐高温导电发热金属丝。6 . The production process of an optical fiber preform according to claim 1 , wherein the elastic conductive sheet adopts the same high-temperature-resistant conductive heating wire as the heating wire. 7 . 7.如权利要求1所述的光纤预制棒的生产工艺，其特征在于，所述辅助加热装置还包括驱动电机和控制单元，所述控制单元电性连接驱动电机，所述驱动电机具有四个拉杆，四个拉杆分别连接四个推杆，所述驱动电机驱动拉杆运动，进而带动推杆水平运动。7. The optical fiber preform production process according to claim 1, wherein the auxiliary heating device further comprises a driving motor and a control unit, the control unit is electrically connected to the driving motor, and the driving motor has four Pull rods, the four pull rods are respectively connected with four push rods, and the drive motor drives the pull rods to move, thereby driving the push rods to move horizontally. 8.一种光纤预制棒，其特征在于，所述光纤预制棒利用如权利要求1至7任意一项权利要求所述的光纤预制棒的生产工艺制成。8 . An optical fiber preform, characterized in that, the optical fiber preform is manufactured by the production process of the optical fiber preform according to any one of claims 1 to 7 .
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Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1078309A (en) * 1992-01-30 1993-11-10 古河电气工业株式会社 The manufacture method of fibre-optical preform
CN1482082A (en) * 2002-09-06 2004-03-17 江苏法尔胜光子有限公司 Sintering process for manufacturing prefabricated fiber rod
KR20040079753A (en) * 2003-03-10 2004-09-16 엘지전선 주식회사 Apparatus for making optical fiber preform capable of reducing soot
JP2004338970A (en) * 2003-05-13 2004-12-02 Sumitomo Electric Ind Ltd Manufacturing method of glass base material
CN1579977A (en) * 2003-08-08 2005-02-16 住友电气工业株式会社 Optical fiber preform, optical fiber, and manufacturing methods thereof
CN1656030A (en) * 2002-06-19 2005-08-17 住友电气工业株式会社 Method for stretching glass base material and stretching device used for the method
CN101328013A (en) * 2007-06-22 2008-12-24 江苏亨通光纤科技有限公司 Method for drawing optical fiber from large-size optical fiber preform
CN101541694A (en) * 2007-06-25 2009-09-23 住友电气工业株式会社 Process for producing drawn glass body
CN101792256A (en) * 2010-02-09 2010-08-04 中天科技精密材料有限公司 Test method for large size optical fiber preforms
CN102627399A (en) * 2012-04-18 2012-08-08 长飞光纤光缆有限公司 Vertical stretch method and device of optical fiber prefabricating rod
CN104053634A (en) * 2011-10-25 2014-09-17 赫罗伊斯石英玻璃股份有限两合公司 Method for producing cylindrical glass components by stretching
CN106082632A (en) * 2016-06-16 2016-11-09 中天科技精密材料有限公司 A kind of interior chemical vapor deposition method of pipe that automatically eliminates prepares glass tubing bow degree method during preform

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3625632B2 (en) * 1997-12-04 2005-03-02 古河電気工業株式会社 Drawing method of glass base material for optical fiber
CN1194916C (en) * 2002-10-23 2005-03-30 长飞光纤光缆有限公司 PCVD process of making optical fiber rod in high deposition rate
US20070062337A1 (en) * 2003-06-30 2007-03-22 Guojun Dai Method and apparatus for drilling preforms for holey optical fibers
JP2007223824A (en) * 2006-02-21 2007-09-06 Shin Etsu Chem Co Ltd Method for sintering porous glass preform
CN101428964B (en) * 2008-09-23 2011-01-12 富通集团有限公司 A method for preparing the cladding of a large-scale optical fiber preform
CN101811822B (en) * 2010-04-16 2012-03-07 长飞光纤光缆有限公司 Method for manufacturing large-diameter optical fiber mandril through PCVD process
JP6459585B2 (en) * 2015-02-10 2019-01-30 住友電気工業株式会社 Optical fiber preform manufacturing method

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1078309A (en) * 1992-01-30 1993-11-10 古河电气工业株式会社 The manufacture method of fibre-optical preform
CN1656030A (en) * 2002-06-19 2005-08-17 住友电气工业株式会社 Method for stretching glass base material and stretching device used for the method
CN1482082A (en) * 2002-09-06 2004-03-17 江苏法尔胜光子有限公司 Sintering process for manufacturing prefabricated fiber rod
KR20040079753A (en) * 2003-03-10 2004-09-16 엘지전선 주식회사 Apparatus for making optical fiber preform capable of reducing soot
JP2004338970A (en) * 2003-05-13 2004-12-02 Sumitomo Electric Ind Ltd Manufacturing method of glass base material
CN1579977A (en) * 2003-08-08 2005-02-16 住友电气工业株式会社 Optical fiber preform, optical fiber, and manufacturing methods thereof
CN101328013A (en) * 2007-06-22 2008-12-24 江苏亨通光纤科技有限公司 Method for drawing optical fiber from large-size optical fiber preform
CN101541694A (en) * 2007-06-25 2009-09-23 住友电气工业株式会社 Process for producing drawn glass body
CN101792256A (en) * 2010-02-09 2010-08-04 中天科技精密材料有限公司 Test method for large size optical fiber preforms
CN104053634A (en) * 2011-10-25 2014-09-17 赫罗伊斯石英玻璃股份有限两合公司 Method for producing cylindrical glass components by stretching
CN102627399A (en) * 2012-04-18 2012-08-08 长飞光纤光缆有限公司 Vertical stretch method and device of optical fiber prefabricating rod
CN106082632A (en) * 2016-06-16 2016-11-09 中天科技精密材料有限公司 A kind of interior chemical vapor deposition method of pipe that automatically eliminates prepares glass tubing bow degree method during preform

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