CN109721237A - The production technology and its preform of preform - Google Patents
The production technology and its preform of preform Download PDFInfo
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- 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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- Prior art keywords
- connecting rod
- plug
- heat
- generating wires
- preform
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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
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- 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 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. a kind of production technology of preform, which comprises the following steps:
1) plug deposition procedures: on core rod lathe, deposition sintering is carried out by oxygen-hydrogen torch, the silicon dioxide microparticle of generation is attached
On kind of stick formed plug matrix；Sintering process is deposited in plug base end, the rate promoted by reducing kind of stick, so that
Plug base end outer diameter is greater than other parts；
2) vitrifying process: melting dehydrating operations are carried out to obtained plug, obtain vitrified plug；
3) the thick extension process first stage: vitrified plug being transferred in high temperature furnace and heats extension, the high temperature furnace control
Temperature protrudes into assisted heating device to plug overstriking region, so that the temperature in plug overstriking region at 2000 DEG C~2200 DEG C
More than 2300 DEG C；Further heating extends, and control return air wind speed is 10cm/s~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, into one
Step heating extends, and control return air wind speed is 20cm/s~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, and controls back
Wind wind speed is 30cm/s~35cm/s；Assisted heating device, far from overstriking region one end, surpasses to plug so that local temperature rises
Cross 2300 DEG C；Cooling after extension, the overstriking area outer diameter that plug is made is big compared with plug central region outer diameter；
Assisted heating device described in the step 3) and step 5) includes a pair of expansion hinge frame being arranged in juxtaposition, push rod and several
A heat-generating wires；
The expansion hinge frame includes first connecting rod, second connecting rod, third connecting rod, fourth link, the 5th connecting rod and six-bar linkage；Institute
It states first connecting rod one end and is fixedly connected with push rod, the hinged heat-generating wires of the other end；The second connecting rod is fixedly connected with push rod, another
Hold hinged heat-generating wires；Cross-articulation in the middle part of the first connecting rod and second connecting rod；Described third connecting rod one end hinged first
At the tie point of connecting rod and heat-generating wires, the hinged heat-generating wires of the other end；The hinged second connecting rod of fourth link and hair
At the tie point of hot wire, the hinged heat-generating wires of the other end；Cross-articulation in the middle part of the third connecting rod and fourth link；Institute
At the tie point for stating the hinged third connecting rod in the 5th connecting rod one end and heat-generating wires, the hinged heat-generating wires of the other end；Described
At the tie point of the hinged fourth link of six-bar linkage and heat-generating wires, the hinged heat-generating wires of the other end；5th connecting rod and
Cross-articulation in the middle part of six-bar linkage；The heat-generating wires are arc coil, and neighbouring heat-generating wires pass through elastic conducting
Electric piece 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 is flexible
It cuts with scissors frame expansion or shrinks；The positive and negative of power supply is separately connected on the heat-generating wires being connected with first connecting rod or second connecting rod
Pole.
2. the production technology of preform as described in claim 1, which is characterized in that in step 1), so that 10mm~
The plug base end outer diameter of 20mm length is greater than other parts 6mm~10mm；In step 2), plug matrix 1800 DEG C~
Dehydration is melted at a temperature of 2000 DEG C；In step 5), the overstriking area outer diameter of plug is made compared with the big 3mm of plug central region outer diameter
~4mm.
3. the production technology of preform as described in claim 1, which is characterized in that in the step 3), expansion hinge frame
In contraction state so that between several heat-generating wires between the upper and lower away from smaller.
4. the production technology of preform as described in claim 1, which is characterized in that in the step 5), expansion hinge frame
In expansion state so that between several heat-generating wires between the upper and lower away from bigger.
5. the production technology of preform as claimed in claim 3, which is characterized in that further include that pre- essence prolongs process；It is described
Pre- essence prolongs process: carrying out heating accurate extension to plug overstriking region, so that the overstriking area outer diameter of plug is compared with plug middle region
Overseas diameter difference is less than or equal to 2mm；The pre- essence is prolonged process and is in after the thick extension process phase III.
6. the production technology of preform as described in claim 1, which is characterized in that the elastic conducting strip uses and hair
The same high temperature resistant conductive exothermal wire of hot wire.
7. the production technology of preform as described in claim 1, which is characterized in that the assisted heating device further includes
Driving motor and control unit, described control unit are electrically connected driving motor, and driving motor tool is there are four pull rod, and four
Pull rod is separately connected four push rods, the driving motor driving pull rod movement, and then drives push rod horizontal movement.
8. a kind of preform, which is characterized in that the preform utilizes such as claim 1 to 7 any one right
It is required that the production technology of the preform is made.
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| CN201910128912.XA CN109721237B (en) | 2017-02-15 | 2017-02-15 | Optical fiber preform production process and optical fiber preform |
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| CN201910128912.XA CN109721237B (en) | 2017-02-15 | 2017-02-15 | Optical fiber preform production process and optical fiber preform |
| CN201710081160.7A CN106904821B (en) | 2017-02-15 | 2017-02-15 | The production technology and its large-scale optical fiber prefabricating stick of large-scale optical fiber prefabricating stick |
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| CN109721237A true CN109721237A (en) | 2019-05-07 |
| CN109721237B CN109721237B (en) | 2021-06-25 |
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| CN201910128912.XA Active CN109721237B (en) | 2017-02-15 | 2017-02-15 | Optical fiber preform production process and optical fiber preform |
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| CN111320374B (en) * | 2018-12-15 | 2023-09-26 | 中天科技精密材料有限公司 | Optical fiber preform and method for manufacturing the same |
| CN116970881B (en) * | 2023-09-22 | 2023-12-19 | 连云港天舒热处理科技有限公司 | Heat treatment equipment for nonferrous metal processing |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109704561A (en) | 2019-05-03 |
| CN109704561B (en) | 2021-09-21 |
| CN106904821B (en) | 2019-03-22 |
| CN106904821A (en) | 2017-06-30 |
| CN109721237B (en) | 2021-06-25 |
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Effective date of registration: 20210922 Address after: 311422 Yinhu Development Zone, Fuyang District, Hangzhou City, Zhejiang Province Patentee after: HANGZHOU FUTONG COMMUNICATION TECHNOLOGY Co.,Ltd. Address before: 300000 West 1-301, No.18 Haitai West Road, Huayuan Industrial Zone, Xiqing District, Tianjin Patentee before: TIANJIN FUTONG GROUP Co.,Ltd. |