CN106904821A - The production technology and its large-scale optical fiber prefabricating stick of large-scale optical fiber prefabricating stick - Google Patents
The production technology and its large-scale optical fiber prefabricating stick of large-scale optical fiber prefabricating stick Download PDFInfo
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- CN106904821A CN106904821A CN201710081160.7A CN201710081160A CN106904821A CN 106904821 A CN106904821 A CN 106904821A CN 201710081160 A CN201710081160 A CN 201710081160A CN 106904821 A CN106904821 A CN 106904821A
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- Prior art keywords
- connecting rod
- heat
- plug
- generating wires
- optical fiber
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 31
- 238000005516 engineering process Methods 0.000 title claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 66
- 238000000034 method Methods 0.000 claims abstract description 48
- 230000008021 deposition Effects 0.000 claims abstract description 11
- 239000011159 matrix material Substances 0.000 claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- 239000001257 hydrogen Substances 0.000 claims description 10
- 229910052739 hydrogen Inorganic materials 0.000 claims description 10
- 238000005245 sintering Methods 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 230000002035 prolonged effect Effects 0.000 claims description 6
- 235000012239 silicon dioxide Nutrition 0.000 claims description 6
- VXEGSRKPIUDPQT-UHFFFAOYSA-N 4-[4-(4-methoxyphenyl)piperazin-1-yl]aniline Chemical compound C1=CC(OC)=CC=C1N1CCN(C=2C=CC(N)=CC=2)CC1 VXEGSRKPIUDPQT-UHFFFAOYSA-N 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 230000018044 dehydration Effects 0.000 claims description 5
- 238000006297 dehydration reaction Methods 0.000 claims description 5
- 239000011859 microparticle Substances 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 239000005049 silicon tetrachloride Substances 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 230000008602 contraction Effects 0.000 claims description 4
- 239000000155 melt Substances 0.000 claims description 4
- 230000007547 defect Effects 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 230000000977 initiatory effect Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000011214 refractory ceramic Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- 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 technology of large-scale optical fiber prefabricating stick, comprise the following steps:1) plug deposition procedures；2) vitrifying operation；3) the thick extension process first stage；4) thick extension process second stage；5) the thick extension process phase III；Step 3) and step 5) if in assisted heating device include expansion hinge frame, push rod and each heat-generating wires for being arranged in juxtaposition for a pair；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 expansion hinge frame to launch or shrink；Positive source and negative pole are connected on heat-generating wires respectively.The present invention uses a kind of brand-new production technology and ancillary heating equipment, solves existing large-scale optical fiber prefabricating stick and the defect that each several part size differs larger occurs in extension process.
Description
Technical field
The present invention relates to preform production field, and in particular to a kind of production technology of large-scale optical fiber prefabricating stick.
Background technology
Preform is the core starting materials of the quartzy series fibre of manufacture.The internal structure of optical fiber is exactly in prefabricated rods
Formed, thus the making of prefabricated rods is most important part in optical fiber fabrication technology.The making of preform has various methods, 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 inwall of tubular body),
Then transparent glass bar is formed by sintering.
In order to there is a sedimentation rate higher, prefabricated rods prepare general all taking and first prepare large-sized plug, then by plug
Draw and attenuate, then outside plug redeposited covering method.In drawing process, plug rises the plug of large-scale optical fiber prefabricating stick
Diameter is less than normal after top 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 less part in footpath, generally removes without causing product to waste, cost raising in actually used process.
The content of the invention
The present invention is regarding to the issue above, it is proposed that a kind of production technology of large-scale optical fiber prefabricating stick, solves existing big
Easily there is the uneven defect of size of prefabricated rods in the production technology of size fibers prefabricated rods.
The technical scheme that the present invention takes is as follows：
A kind of production technology of large-scale optical fiber prefabricating stick, comprises the following steps:
1) plug deposition procedures：On core rod lathe, silicon tetrachloride, hydrogen and oxygen are passed through in oxygen-hydrogen torch, carried out
Deposition sintering, the silicon dioxide microparticle of generation is attached to formation plug matrix on kind of rod；Deposited in plug base end sintered
Journey, by reducing the speed that kind of rod is lifted so that the plug base end external diameter of 10mm~20mm length is more than other parts 6mm
~10mm；
2) vitrifying operation：The plug matrix for obtaining melts dehydration at a temperature of 1800 DEG C~2000 DEG C, obtains glass
The plug of change；
3) the thick extension process first stage：Vitrified plug is transferred to be heated in high temperature furnace and is extended, the high temperature furnace
Control temperature stretches into assisted heating device to plug overstriking region so that the temperature in plug overstriking region at 2000 DEG C~2200 DEG C
Degree is more than 2300 DEG C；Further heating extends, and it is 10~15cm/s to control return air wind speed；
4) thick extension process second stage：Move assisted heating device, high temperature furnace controls temperature at 2000 DEG C~2200 DEG C,
Further heating extends, and it is 20~25cm/s to control return air wind speed；
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 is to plug away from overstriking region one end so that in local temperature
Rise more than 2300 DEG C；Extension terminate after, cooling, be obtained plug overstriking area outer diameter compared with the big 3mm of plug central region external diameter~
4mm；
The step 3) and step 5) described in assisted heating device include being arranged in juxtaposition for a pair expansion hinge frame, push rod and
Several heat-generating wires；
The expansion hinge frame includes that first connecting rod, second connecting rod, third connecting rod, fourth link, the 5th connecting rod and the 6th connect
Bar；Described first connecting rod one end is fixedly connected push rod, and the other end is hinged heat-generating wires；The second connecting rod is fixedly connected and pushes away
Bar, the other end is hinged heat-generating wires；The first connecting rod and second connecting rod middle part cross-articulation；Third connecting rod one end hinge
Connect at the tie point of first connecting rod and heat-generating wires, the other end is hinged heat-generating wires；The fourth link is hinged the second company
At the tie point of bar and heat-generating wires, the other end is hinged heat-generating wires；The third connecting rod and fourth link middle part intersect
It is hinged；Described 5th connecting rod one end is hinged at the tie point of third connecting rod and heat-generating wires, and the other end is hinged heat-generating wires；
The six-bar linkage is hinged at the tie point of fourth link and heat-generating wires, and the other end is hinged heat-generating wires；Described 5th
Connecting rod and six-bar linkage middle part cross-articulation；The heat-generating wires are arc coil, and neighbouring heat-generating wires pass through
Elastic conducting strip is connected；
Push rod connects first connecting rod or second connecting rod away from third connecting rod or the other end of fourth link；The push rod drives
Expansion hinge frame launches or shrinks；Be connected respectively on the heat-generating wires connected with first connecting rod or second connecting rod power supply positive pole and
Negative pole.
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 external diameter of 10mm~20mm length is more than other parts 6mm~10mm, compensate for subsequently extending the initiating terminal that process easily occurs
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, and faster, heat is passed more rapidly heat transfer
It is handed to matrix inner core；So that the process stretched when initial is rapider, reduces the reduction of diameter and reduce possible waste.Then
Assisted heating device is used by the phase III, the heat of stage loss is compensated, and increases the circulation of hot gas so that heat is passed
Pass evenly, reduce the larger-size defect of prefabricated rods extending end.Assisted heating device thermal-stable in the present invention, leads to
Overregulating push rod just with the spacing between regulation heating wire, and then can adjust the temperature of heating and the scope of heating region,
Its is easy to operate.
Optionally, the step 3) in, 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-up temperature speed
Plus it is transferred to matrix inner core rapidly.
Optionally, the step 5) in, 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 also prolongs operation including pre- essence；The pre- essence prolongs operation：
Plug overstriking region is carried out to heat accurate extension so that the overstriking area outer diameter of plug is small compared with plug central region external diameter difference
In or equal to 2mm；The pre- essence is prolonged operation and is in after the thick extension process phase III.Operation is prolonged using pre- essence prefabricated to obtaining
Rod local thicker part point carries out pre- extension, the precise control for being easy to subsequent fine extension process equal proportion to extend.
Optionally, the elastic conducting strip uses the high temperature resistant conductive exothermal wire same with heat-generating wires.
Optionally, the assisted heating device also includes motor and control unit, and described control unit is electrically connected with
Motor, the motor has four pull bars, and four pull bars connect four push rods respectively, and the motor drives and draws
Bar is moved, and then drives 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 invention are as follows：A kind of production technology of large-scale optical fiber prefabricating stick of the invention deposits work in plug
Sequence so that the external diameter of plug base end 10mm~20mm length is more than other parts 6mm~10mm, compensate for subsequently extending
The reduction of the diameter of the initiating terminal that Cheng Rongyi occurs.Thick extension process is separated into three different stages simultaneously, is carried out respectively
Regulation and control, assisted heating device is used to the first stage, compensates formula heating so that the temperature of initial end is higher, heat transfer
Faster so that the process stretched when initial is rapider, reduces the reduction of diameter and reduces possible waste.Then the 3rd is passed through
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, by regulation
Push rod just with the spacing between regulation heating wire, and then can adjust the temperature of heating and the scope of heating region, its operation
It is easy.
In addition, expansion hinge frame be in contraction state so that between several heat-generating wires between the upper and lower away from smaller.Heating
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-up temperature speed
Internal core.Expansion hinge frame be 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.Operation is prolonged to obtaining the local thicker part point of prefabricated rods using pre- essence
Pre- extension is carried out, the precise control for being easy to subsequent fine extension process equal proportion to extend.
Brief description of the drawings：
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 representation of the production technology of large-scale optical fiber prefabricating stick；
Fig. 3 be the production technology of large-scale optical fiber prefabricating stick assisted heating device in expansion hinge frame structural representation；
Fig. 4 is that the assisted heating device of the production technology of large-scale optical fiber prefabricating stick is engaged structural representation with prefabricated rods
Figure.
Each reference is in figure：
1st, expansion hinge frame；2nd, push rod；3rd, heat-generating wires；4th, first connecting rod；5th, second connecting rod；6th, third connecting rod；7th,
Double leval jib；8th, the 5th connecting rod；9th, six-bar linkage；10th, elastic conducting strip；11st, motor；12nd, pull bar；14th, control unit；
15th, high temperature furnace.
Specific embodiment：
With reference to each accompanying drawing, the present invention is described in detail.
Signified large scale refers generally to a diameter of 120mm prefabricated rods or larger-sized prefabricated rods 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：Also a kind of production technology of large-scale optical fiber prefabricating stick (see accompanying drawing 1) of the present invention, including following step
Suddenly:
1) plug deposition procedures：On core rod lathe, silicon tetrachloride, hydrogen and oxygen are passed through in oxygen-hydrogen torch, carried out
Deposition sintering, the silicon dioxide microparticle of generation is attached to formation plug matrix on kind of rod；Deposited in plug base end sintered
Journey, by reducing the speed that kind of rod is lifted so that the external diameter of plug base end 10mm length is more than other parts 6mm；
2) vitrifying operation：The plug matrix for obtaining melts dehydration at a temperature of 1800 DEG C, obtains vitrified plug；
3) the thick extension process first stage：Vitrified plug is transferred to be heated in high temperature furnace 15 and is extended, high temperature furnace 15
Control temperature stretches into assisted heating device to plug overstriking region at 2000 DEG C so that the temperature in plug overstriking region is 2300
℃；Further heating extends, and it is 10cm/s to control return air wind speed；
4) thick extension process second stage：Move assisted heating device, high temperature furnace 15 controls temperature at 2000 DEG C, further
Heating extends, and it is 20cm/s to control return air wind speed；
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 is to plug away from overstriking region one end so that local temperature is increased beyond 2300 DEG C；Prolong
After stretching end, cooling is obtained the overstriking area outer diameter of plug compared with the big 3mm of plug central region external diameter；
6) pre- essence prolongs operation：To plug overstriking region heat accurate extension so that the overstriking area outer diameter of plug compared with
Plug central region external diameter difference is equal to 2mm.
Embodiment two：Also a kind of production technology of large-scale optical fiber prefabricating stick of the present invention, comprises the following steps:
1) plug deposition procedures：On core rod lathe, silicon tetrachloride, hydrogen and oxygen are passed through in oxygen-hydrogen torch, carried out
Deposition sintering, the silicon dioxide microparticle of generation is attached to formation plug matrix on kind of rod；Deposited in plug base end sintered
Journey, by reducing the speed that kind of rod is lifted so that the external diameter of plug base end 20mm length is more than other parts 10mm；
2) vitrifying operation：The plug matrix for obtaining melts dehydration at a temperature of 2000 DEG C, obtains vitrified plug；
3) the thick extension process first stage：Vitrified plug is transferred to be heated in high temperature furnace and is extended, high temperature furnace 15 is controlled
Temperature processed stretches into assisted heating device to plug overstriking region at 2200 DEG C so that the temperature in plug overstriking region is 2300 DEG C；
Further heating extends, and it is 15cm/s to control return air wind speed；
4) thick extension process second stage：Move assisted heating device, high temperature furnace 15 controls temperature at 2200 DEG C, further
Heating extends, and it is 25cm/s to control return air wind speed；
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 is to plug away from overstriking region one end so that local temperature is increased beyond 2300 DEG C；Extend
After end, cooling is obtained the overstriking area outer diameter of plug compared with the big 4mm of plug central region external diameter；
6) pre- essence prolongs operation：To plug overstriking region heat accurate extension so that the overstriking area outer diameter of plug compared with
Plug central region external diameter difference is equal to 2mm.
The step 3) in, 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 it is smaller with cause heat more concentrate, faster, heat is more for heating-up temperature speed
Plus it is transferred to matrix inner core rapidly.
The step 5) in, 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 external diameter of 10mm~20mm length is more than other parts 6mm~10mm, compensate for subsequently extending the initiating terminal that process easily occurs
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, and faster, heat is passed more rapidly heat transfer
It is handed to matrix inner core；So that the process stretched when initial is rapider, reduces the reduction of diameter and reduce possible waste.Then
Assisted heating device is used by the phase III, the heat of stage loss is compensated, and increases the circulation of hot gas so that heat is passed
Pass evenly, reduce the larger-size defect of prefabricated rods extending end.
The invention discloses a kind of assisted heating device (see accompanying drawing 2,3,4), the assisted heating device includes a pair 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, the and of the 5th connecting rod 8
Six-bar linkage 9；The one end of the first connecting rod 4 is fixedly connected push rod 2, and the other end is hinged heat-generating wires 3；The second connecting rod 5
Push rod 2 is fixedly connected, the other end is hinged heat-generating wires 3；The first connecting rod 4 and the middle part cross-articulation of second connecting rod 5；It is described
The one end of third connecting rod 6 is hinged at the tie point of first connecting rod 4 and heat-generating wires 3, and the other end is hinged heat-generating wires 3；It is described
Fourth link 7 is hinged at the tie point of second connecting rod 5 and heat-generating wires 3, and the other end is hinged heat-generating wires 3；Described 3rd
Connecting rod 6 and the middle part cross-articulation of fourth link 7；Described one end of 5th connecting rod 8 is hinged the company of third connecting rod 6 and heat-generating wires 3
Junction, the other end is hinged heat-generating wires 3；The six-bar linkage 9 is hinged the tie point of fourth link 7 and heat-generating wires 3
Place, the other end is hinged heat-generating wires 3；5th connecting rod 8 and the middle part cross-articulation of six-bar linkage 9；The heat-generating wires 3
It is arc coil, neighbouring heat-generating wires 3 are connected by elastic conducting strip 10；
Push rod 2 connects first connecting rod 4 or second connecting rod 5 away from third connecting rod 6 or the other end of fourth link 7；It is described to push away
Bar 2 drives expansion hinge frame 1 to launch or shrink；It is connected respectively with first connecting rod 4 or the connected heat-generating wires 3 of second connecting rod 5
The positive pole and negative pole of power supply.
Assisted heating device thermal-stable in the present invention, by adjust push rod 2 just can with regulation heating wire 3 it
Between spacing, and then adjust heating temperature and heating region scope, its is easy to operate.
The production technology of the large-scale optical fiber prefabricating stick also prolongs operation including pre- essence；The pre- essence prolongs operation：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 external diameter difference；
The pre- essence is prolonged operation and is in after the thick extension process phase III.Operation is prolonged to obtaining the thicker of prefabricated rods part using pre- essence
Part carries out pre- extension, the precise control for being easy to subsequent fine extension process equal proportion to extend.
The elastic conducting strip 10 uses the high temperature resistant conductive exothermal wire 3 same with heat-generating wires 3.
The assisted heating device also includes motor 11 and control unit 14, and described control unit 14 is electrically connected with drives
Dynamic motor 11, the motor 11 has four pull bars 12, and four pull bars 12 connect four push rods 2 respectively, described to drive electricity
Machine 11 drives pull bar 12 to move, and then drives the horizontal movement of push rod 2.
Control unit 14 in the present embodiment is computer system.Heat-generating wires 3 and elastic conducting strip 10 in the present invention
Tungsten filament can be used.Expansion hinge frame 1 can use refractory ceramics, such as boron nitride ceramics.
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 rod into silicon dioxide microparticle, forms plug matrix；Sintering process is deposited in plug base end, is planted by reducing
The speed of rod lifting so that the external diameter of plug base end 10mm length is more than other parts 6mm；2) the plug matrix for obtaining
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, stretches 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 it is 10cm/s to control return air wind speed；4) move assisted heating device, high temperature
Stove controls temperature at 2000 DEG C, and further heating extends, and it is 20cm/s to control return air wind speed；5) high temperature furnace controls temperature 2100
DEG C, further heating extends, and it is 30cm/s to control return air wind speed；Assisted heating device, away from overstriking region one end, makes to plug
Obtain local temperature and be increased beyond 2300 DEG C；After extension terminates, cooling is obtained the overstriking area outer diameter of plug compared with plug central region
The big 3mm of external diameter；6) the pre- essence prolongs operation：Plug overstriking region is carried out to heat accurate extension so that the overstriking region of plug
External diameter is equal to 2mm compared with plug central region external diameter difference.
The preferred embodiments of the present invention are the foregoing is only, not thereby scope of patent protection of the invention is limited, it is all
It is the equivalent structure transformation made with description of the invention and accompanying drawing content, is directly or indirectly used in other related technologies
Field, similarly includes within the scope of the present invention.
Claims (7)
1. a kind of production technology of large-scale optical fiber prefabricating stick, it is characterised in that comprise the following steps：
1) plug deposition procedures：On core rod lathe, silicon tetrachloride, hydrogen and oxygen are passed through in oxygen-hydrogen torch, are deposited
Sintering, the silicon dioxide microparticle of generation is attached to formation plug matrix on kind of rod；Sintering process is deposited in plug base end, is led to
Cross the speed for reducing the lifting of kind of rod so that the plug base end external diameter of 10mm~20mm length more than other parts 6mm~
10mm；
2) vitrifying operation：The plug matrix for obtaining melts dehydration at a temperature of 1800 DEG C~2000 DEG C, obtains vitrified
Plug；
3) the thick extension process first stage：Vitrified plug is transferred to be heated in high temperature furnace and is extended, the high temperature furnace control
Temperature stretches into assisted heating device to plug overstriking region at 2000 DEG C~2200 DEG C so that the temperature in plug overstriking region
More than 2300 DEG C；Further heating extends, and it is 10cm/s~15cm/s to control return air wind speed；
4) thick extension process second stage：Move assisted heating device, high temperature furnace controls temperature at 2000 DEG C~2200 DEG C, enters one
Step heating extends, and it is 20cm/s~25cm/s to control return air wind speed；
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 is to plug away from overstriking region one end so that local temperature rises super
Cross 2300 DEG C；After extension terminates, cooling is obtained the overstriking area outer diameter of plug compared with the big 3mm~4mm of plug central region external diameter；
The step 3) and step 5) described in assisted heating device the expansion hinge frame, the push rod and some that include being arranged in juxtaposition for a pair
Individual 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
State first connecting rod one end and be fixedly connected push rod, the other end is hinged heat-generating wires；The second connecting rod is fixedly connected push rod, another
End is hinged heat-generating wires；The first connecting rod and second connecting rod middle part cross-articulation；Described third connecting rod one end is hinged first
At the tie point of connecting rod and heat-generating wires, the other end is hinged heat-generating wires；The fourth link is hinged second connecting rod with hair
At the tie point of hot wire, the other end is hinged heat-generating wires；The third connecting rod and fourth link middle part cross-articulation；Institute
State the 5th connecting rod one end to be hinged at the tie point of third connecting rod and heat-generating wires, the other end is hinged heat-generating wires；Described
Six-bar linkage is hinged at the tie point of fourth link and heat-generating wires, and the other end is hinged heat-generating wires；5th connecting rod and
Six-bar linkage middle part cross-articulation；The heat-generating wires are arc coil, and neighbouring heat-generating wires pass through elastic conducting
Electric piece is connected；
Push rod connects first connecting rod or second connecting rod away from third connecting rod or the other end of fourth link；The push rod drives flexible
Hinge frame launches or shrinks；The positive pole of power supply is connected respectively with first connecting rod or the connected heat-generating wires of second connecting rod and is born
Pole.
2. the production technology of large-scale optical fiber prefabricating stick as claimed in claim 1, it is characterised in that the step 3) in, stretch
Contracting hinge frame be in contraction state so that between several heat-generating wires between the upper and lower away from smaller.
3. the production technology of large-scale optical fiber prefabricating stick as claimed in claim 1, it is characterised in that the step 5) in, stretch
Contracting hinge frame be in expansion state so that between several heat-generating wires between the upper and lower away from bigger.
4. the production technology of large-scale optical fiber prefabricating stick as claimed in claim 2, it is characterised in that also prolong work including pre- essence
Sequence；The pre- essence prolongs operation：Plug overstriking region is carried out to heat accurate extension so that the overstriking area outer diameter of plug is compared with plug
Central region external diameter difference is less than or equal to 2mm；The pre- essence is prolonged operation and is in after the thick extension process phase III.
5. the production technology of large-scale optical fiber prefabricating stick as claimed in claim 1, it is characterised in that the elastic conducting strip is adopted
With the high temperature resistant conductive exothermal wire same with heat-generating wires.
6. the production technology of large-scale optical fiber prefabricating stick as claimed in claim 1, it is characterised in that the assisted heating device
Also include motor and control unit, described control unit is electrically connected with motor, and the motor has four drawings
Bar, four pull bars connect four push rods respectively, and the motor drives pull bar motion, and then drives push rod horizontal movement.
7. a kind of large-scale optical fiber prefabricating stick, it is characterised in that the large-scale optical fiber prefabricating stick is using such as claim 1 to 6
The production technology of the large-scale optical fiber prefabricating stick described in any one claim is made.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910129028.8A CN109704561B (en) | 2017-02-15 | 2017-02-15 | Production process of large-size optical fiber preform |
| 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 |
Applications Claiming Priority (1)
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|---|---|---|---|
| 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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| CN201910129028.8A Division CN109704561B (en) | 2017-02-15 | 2017-02-15 | Production process of large-size optical fiber preform |
| CN201910128912.XA Division CN109721237B (en) | 2017-02-15 | 2017-02-15 | Optical fiber preform production process and optical fiber preform |
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| CN106904821A true CN106904821A (en) | 2017-06-30 |
| CN106904821B CN106904821B (en) | 2019-03-22 |
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| CN201710081160.7A Active 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 |
| CN201910128912.XA Active CN109721237B (en) | 2017-02-15 | 2017-02-15 | Optical fiber preform production process and optical fiber preform |
| CN201910129028.8A Active CN109704561B (en) | 2017-02-15 | 2017-02-15 | Production process of large-size optical fiber preform |
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| CN201910129028.8A Active CN109704561B (en) | 2017-02-15 | 2017-02-15 | Production process of large-size optical fiber preform |
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| CN111320374A (en) * | 2018-12-15 | 2020-06-23 | 中天科技精密材料有限公司 | Optical fiber preform and method for manufacturing the same |
| CN116970881A (en) * | 2023-09-22 | 2023-10-31 | 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 |
|---|---|
| CN106904821B (en) | 2019-03-22 |
| CN109721237B (en) | 2021-06-25 |
| CN109704561A (en) | 2019-05-03 |
| CN109704561B (en) | 2021-09-21 |
| CN109721237A (en) | 2019-05-07 |
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