CN104710106B - A kind of induction furnace for preform collapsing - Google Patents
A kind of induction furnace for preform collapsing Download PDFInfo
- Publication number
- CN104710106B CN104710106B CN201510101949.5A CN201510101949A CN104710106B CN 104710106 B CN104710106 B CN 104710106B CN 201510101949 A CN201510101949 A CN 201510101949A CN 104710106 B CN104710106 B CN 104710106B
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- CN
- China
- Prior art keywords
- heater
- fire door
- sealing gland
- door sealing
- bell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/018—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD] by glass deposition on a glass substrate, e.g. by inside-, modified-, plasma-, or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
- C03B37/01861—Means for changing or stabilising the diameter or form of tubes or rods
- C03B37/01869—Collapsing
-
- 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
Abstract
A kind of induction furnace for preform collapsing, it is related to apparatus for preparing optical fiber blanks field, including body of heater, body of heater center is provided with induction coil, induction coil inwall is provided with quartzy spacer, heater is arranged with quartzy spacer, heat preservation component is housed between heater and quartzy spacer, the body of heater both sides are respectively equipped with bell and fire door sealing gland part, fire door sealing gland part is located at the inside of homonymy bell, the side wall insertion of each fire door sealing gland part is provided with one group of through hole blown to outside body of heater being obliquely installed, the side wall of one of fire door sealing gland part is also penetrated provided with one group of aperture for being obliquely installed and being blown into body of heater, the bell of the body of heater both sides is respectively equipped with an air inlet pipe, and each air inlet pipe with the fire door sealing gland part that homonymy is set is interior connects.The present invention does not influence optical wand quality, and the efficiency of heating surface is high, and in-furnace temperature is evenly distributed, and ensures prefabricated rods excellent geometry and dimensional accuracy.
Description
Technical field
The present invention relates to apparatus for preparing optical fiber blanks field, is specifically a kind of sense for preform collapsing
Answer stove.
Background technology
, it is necessary to which the pure quartz ampoule deposited is melted when using plasma vapour deposition process (PCVD) processes preform
Shorten solid plug into, generally use oxyhydrogen flame or graphite resistor furnace are heated at present.Oxyhydrogen flame mode of heating is not only warm
Amount loss is big, and a large amount of moisture content make ambient humidity big caused by burning, influence optical wand quality, and the efficiency of heating surface is low, and contracting rod speed is slow；Stone
Black resistance furnace there is also the efficiency of heating surface it is not high enough the problem of, graphite resistor furnace is complicated in addition, chi of the body of heater along rod length direction
It is very little big, reduce the effective rod length of plug.
The content of the invention
For defect present in prior art, it is an object of the invention to provide a kind of for preform collapsing
Induction furnace, does not influence optical wand quality, and the efficiency of heating surface is high, and in-furnace temperature is evenly distributed, ensure the excellent geometry of prefabricated rods and
Dimensional accuracy.
To achieve the above objectives, the present invention adopts the technical scheme that：A kind of induction furnace for preform collapsing,
Including body of heater, body of heater center is provided with induction coil, and induction coil inwall is provided with quartzy spacer, heating is arranged with quartzy spacer
Body, is equipped with heat preservation component between heater and quartzy spacer, the body of heater both sides are respectively equipped with bell and fire door sealing gland part, stove
Implication envelope part be located at the inside of homonymy bell, the side wall insertion of each fire door sealing gland part provided with one group be obliquely installed to stove
The through hole blown in vitro, the side wall of one of fire door sealing gland part, which also penetrates, to be obliquely installed provided with one group and is blown into body of heater
Aperture, the bells of the body of heater both sides is respectively equipped with an air inlet pipe, and the fire door sealing gland that each air inlet pipe is set with homonymy
Connected in part.
On the basis of above-mentioned technical proposal, the body of heater both sides are respectively equipped with end cap, and bell is located at the outer of each end cap
Side.
On the basis of above-mentioned technical proposal, sealing is formed between the outer wall of fire door sealing gland part and the bell inwall of homonymy
Ring-shaped air chamber, in ring-shaped air chamber and the fire door sealing gland part and the air inlet pipe of homonymy connects.
On the basis of above-mentioned technical proposal, the body of heater, end cap, cooling water channel is equipped with inside bell, on the left of body of heater
Bell and cover internal connect and be connected with first via cooling water, be connected with the second road cooling water in body of heater, the bell on the right side of body of heater
Connected with cover internal and be connected with the 3rd road cooling water.
On the basis of above-mentioned technical proposal, the induction coil is that rectangle copper pipe processing forms, and is led in its rectangle copper pipe
There is the 4th road cooling water.
On the basis of above-mentioned technical proposal, the through hole uniform ring is set around fire door sealing gland part, and each through hole is located at
One end of fire door sealing gland part outer wall is close to heater, positioned at one end of fire door sealing gland part inwall relative to the other end away from hair
Hot body, and the angle of inclination of through hole is 15 °~30 °.
On the basis of above-mentioned technical proposal, the aperture is evenly distributed on one of fire door sealing gland part side in a ring
Wall, it is located at one end of fire door sealing gland part inwall close to heater, positioned at one end of fire door sealing gland part outer wall relative to another
One end is away from heater.
On the basis of above-mentioned technical proposal, the induction coil, quartzy spacer, heat preservation component and heater is concentric sets
Put.
On the basis of above-mentioned technical proposal, the heat preservation component is heat-preservation cylinder, heater made of graphite heat-barrier material
For graphite material.
On the basis of above-mentioned technical proposal, the material of the fire door sealing gland part is quartz glass.
The beneficial effects of the present invention are：
1st, apply alternating voltage at induction coil both ends, the electromagnetic field of alternation is produced, because electromagnetic induction produces in heater
Raw vortex, is acted on by resistance and electric energy is transformed into heat energy, and heater periphery heat-preservation cylinder made of graphite heat-barrier material
Surround, heat is concentrated on into body of heater center, reach the temperature required for contracting rod, improve the efficiency of heating surface, in-furnace temperature is evenly distributed.
2nd, fire door sealing gland part is made up of resistant to elevated temperatures quartz glass, can either ensure good air seal or so, again
Can ensure it is indeformable at high temperature, reduce fire door sealing gland replacing frequency, service life length, reduce when slowing down of equipment
Between, improve work efficiency.
3rd, the induction furnace for preform collapsing is compact-sized, and the length along rod length direction is 220mm~260mm,
For graphite resistor furnace, present invention occupancy rod length direction size is small, can be produced more under same machine tool structure
Long prefabricated rods, effectively increase the production capacity of existing equipment.
4th, the body of heater, end cap, be equipped with cooling water channel inside bell, the bell and cover internal series connection on the left of body of heater are simultaneously
First via cooling water is connected with, is connected with the second road cooling water in body of heater, the bell and cover internal on the right side of body of heater are connected and be connected with
Three road cooling waters；While furnace high-temperature is kept, the relatively low temperature of furnace body outer wall can be ensured, improve the use peace of equipment
Quan Xing.Induction coil is that rectangle copper pipe processing forms, and the 4th road cooling water is connected with its rectangle copper pipe；Sensing can effectively be reduced
The operating temperature of coil, to ensure the service life of induction coil.
Brief description of the drawings
Fig. 1 is the sectional view for the induction furnace that the embodiment of the present invention is used for preform collapsing.
Reference：
Body of heater 1, induction coil 2, quartzy spacer 3, heater 4, heat preservation component 5, end cap 6, bell 7, air inlet pipe 71, fire door
Sealing gland part 8, ring-shaped air chamber 81, through hole 82, aperture 83.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
As shown in figure 1, the present invention is used for the induction furnace of preform collapsing, including body of heater 1, installed in the center of body of heater 1
Induction coil 2, induction coil inwall is provided with quartzy spacer 3, and quartzy spacer internal sleeve is provided with heater 4, heater 4 and sensing
Heat preservation component 5, and induction coil 2, the 4 concentric setting of quartzy spacer 3, heat preservation component 5 and heater are arranged between coil 2.
In the present embodiment, the heat preservation component 5 is heat-preservation cylinder made of resistant to elevated temperatures graphite heat-barrier material, and heater 4 is also high temperature resistant
Graphite material be made.
As shown in figure 1, the both sides of body of heater 1 are respectively equipped with end cap 6, bell 7 is respectively equipped with the outside of each end cap, bell 7,
Each inside of bell 7 is provided with a fire door sealing gland part 8, and fire door sealing gland part 8 is located at the both ends of heater 4.1 liang of the body of heater
The bell 7 of side is respectively equipped with an air inlet pipe 71, and the outer wall of each fire door sealing gland part 8 caves inward, and with bell inwall it
Between form the ring-shaped air chamber 81 of sealing, ring-shaped air chamber 81 with the fire door sealing gland part 8 and the air inlet pipe 71 of homonymy connects
It is logical.The side wall insertion of each fire door sealing gland part 8 is provided with one group of through hole 82 blown to outside body of heater 1 being obliquely installed, described logical
The uniform ring of hole 82 is set around fire door sealing gland part 8, and each through hole 82 is located at one end of the outer wall of fire door sealing gland part 8 close to heater
4, positioned at one end of the inwall of fire door sealing gland part 8 relative to the other end away from heater 4, and the angle of inclination of through hole 82 is 15 °
~30 °, can be by outside the oxygen blowout body of heater 1 at the center of heater 4.The side wall of one of fire door sealing gland part 8, which also penetrates, to be set
There is one group of aperture 83 for being obliquely installed and being blown into body of heater 1, the aperture 83 is evenly distributed on the fire door sealing gland zero in a ring
The side wall of part 8, it is located at one end of the inwall of fire door sealing gland part 8 close to heater 4, positioned at the one of the outer wall of fire door sealing gland part 8
End is set outside relative to the other end away from heater 4, the oblique body of heater 1 of aperture 83, forms fire door sealing gland, prevents oxygen from the end stove
Mouth enters body of heater 1.In the present embodiment, the aperture of through hole 82 and aperture 83 is 1.5 ± 0.2mm.
The body of heater 1, end cap 6, bell 7 are process by stainless steel, and inside is equipped with cooling water channel, and body of heater 1 is left
The bell 7 and the internal series-connection of end cap 6 of side are simultaneously connected with first via cooling water, are connected with the second road cooling water in body of heater 1, on the right side of body of heater
Bell 7 and the internal series-connection of end cap 6 are simultaneously connected with the 3rd road cooling water.The induction coil 2 is that rectangle copper pipe processing forms, its rectangle
The 4th road cooling water is connected with copper pipe, can effectively reduce the operating temperature of induction coil 2, to ensure the use of induction coil 2
Life-span.
The present invention is used for the induction furnace of preform collapsing in use, being first turned on the magnetic valve of air inlet pipe 71, is passed through
Inert gas, to protect graphite member in body of heater 1 not oxidized.Induction furnace power supply is then turned on after a period of time, in induction coil 2
Both ends apply alternating voltage, produce the electromagnetic field of alternation, because electromagnetic induction produces vortex in heater 4, by resistance effect
Electric energy is set to be transformed into heat energy.The periphery of heater 4 heat preservation component 5 made of resistant to elevated temperatures graphite heat-barrier material surrounds, will be by heat
Amount concentrates on the center of body of heater 1, reaches the temperature required for contracting rod.The quartz liner for having deposited completion is passed through to the centre of induction furnace
Through hole, induction furnace central temperature can reach more than 2300 DEG C during collapsing, and body of heater 1 slowly moves back and forth, and quartz liner is in high temperature
Gradually it is melt down and shortens solid mandrel into.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
On the premise of the principle of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as the protection of the present invention
Within the scope of.The content not being described in detail in this specification belongs to prior art known to professional and technical personnel in the field.
Claims (5)
1. a kind of induction furnace for preform collapsing, including body of heater, it is characterised in that：Body of heater center is provided with the line of induction
Circle, induction coil inwall are provided with quartzy spacer, heater are arranged with quartzy spacer, equipped with guarantor between heater and quartzy spacer
Warm part, the induction coil, quartzy spacer, heat preservation component and the concentric setting of heater；The body of heater both sides are respectively equipped with
Bell and fire door sealing gland part, fire door sealing gland part are located at the inside of homonymy bell, the side wall insertion of each fire door sealing gland part
Provided with one group of through hole blown to outside body of heater being obliquely installed, the side wall of one of fire door sealing gland part is also penetrated provided with one group
The aperture for being obliquely installed and being blown into body of heater, the bell of the body of heater both sides are respectively equipped with an air inlet pipe, and each air inlet
Manage and connected in the fire door sealing gland part set with homonymy；The material of the fire door sealing gland part is quartz glass；
The heat preservation component is heat-preservation cylinder made of graphite heat-barrier material；
The body of heater both sides are respectively equipped with end cap, and bell is located at the outside of each end cap；The body of heater, end cap, bell inside are
Provided with cooling water channel, bell and cover internal on the left of body of heater are connected and are connected with first via cooling water, and the second tunnel is connected with body of heater
Cooling water, bell and cover internal on the right side of body of heater are connected and are connected with the 3rd road cooling water；The induction coil is rectangle copper pipe
It is process, the 4th road cooling water is connected with its rectangle copper pipe.
2. it is used for the induction furnace of preform collapsing as claimed in claim 1, it is characterised in that：Outside fire door sealing gland part
Form the ring-shaped air chamber of sealing between wall and the bell inwall of homonymy, ring-shaped air chamber with the fire door sealing gland part and homonymy
Air inlet pipe connect.
3. it is used for the induction furnace of preform collapsing as claimed in claim 1, it is characterised in that：The through hole uniform ring around
Fire door sealing gland part is set, and each through hole is located at one end of fire door sealing gland part outer wall close to heater, positioned at fire door sealing gland zero
One end of part inwall is relative to the other end away from heater, and the angle of inclination of through hole is 15 °~30 °.
4. it is used for the induction furnace of preform collapsing as claimed in claim 1, it is characterised in that：The aperture is equal in a ring
Even to be distributed in one of fire door sealing gland feature side-wall, it is located at one end of fire door sealing gland part inwall close to heater, is located at
One end of fire door sealing gland part outer wall is relative to the other end away from heater.
5. it is used for the induction furnace of preform collapsing as claimed in claim 1, it is characterised in that：Heater is graphite material
Matter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510101949.5A CN104710106B (en) | 2015-03-09 | 2015-03-09 | A kind of induction furnace for preform collapsing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510101949.5A CN104710106B (en) | 2015-03-09 | 2015-03-09 | A kind of induction furnace for preform collapsing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104710106A CN104710106A (en) | 2015-06-17 |
| CN104710106B true CN104710106B (en) | 2017-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510101949.5A Active CN104710106B (en) | 2015-03-09 | 2015-03-09 | A kind of induction furnace for preform collapsing |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203037A (en) * | 2015-09-21 | 2015-12-30 | 长飞光纤光缆股份有限公司 | Device for on-line measurement of diameter of prefabricated rod |
| WO2020180466A1 (en) | 2019-03-05 | 2020-09-10 | Corning Incorporated | System and methods for processing an optical fiber preform |
| CN117328168A (en) * | 2023-09-27 | 2024-01-02 | 陕西美兰德新材料股份有限公司 | Tubular high-temperature ceramic furnace for carbon fiber |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1433981A (en) * | 2003-01-28 | 2003-08-06 | 烽火通信科技股份有限公司 | Machine for forming rod of prefabricated optical fibre rod by induction heating |
| EP1426343A2 (en) * | 2002-11-13 | 2004-06-09 | Sumitomo Electric Industries, Ltd. | Method and apparatus for drawing an optical fiber from a preform |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4022769B2 (en) * | 2003-11-20 | 2007-12-19 | 住友電気工業株式会社 | Glass pipe processing method |
| CN101182112B (en) * | 2007-11-09 | 2010-12-22 | 长飞光纤光缆有限公司 | Collapsar furnace for manufacturing fibre-optical prefabricated rod |
| CN102344246A (en) * | 2010-07-30 | 2012-02-08 | 江苏亨通光纤科技有限公司 | Air seal device of fiber drawing furnace for wire drawing of diameter stepindex fiber prefabrication rod |
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2015
- 2015-03-09 CN CN201510101949.5A patent/CN104710106B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1426343A2 (en) * | 2002-11-13 | 2004-06-09 | Sumitomo Electric Industries, Ltd. | Method and apparatus for drawing an optical fiber from a preform |
| CN1433981A (en) * | 2003-01-28 | 2003-08-06 | 烽火通信科技股份有限公司 | Machine for forming rod of prefabricated optical fibre rod by induction heating |
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| Publication number | Publication date |
|---|---|
| CN104710106A (en) | 2015-06-17 |
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Effective date of registration: 20180404 Address after: 430074 Optics Valley Pioneer Street, Wuhan, Wuhan, Hubei Patentee after: Wuhan retop Fiberhome Technology Co. Ltd. Address before: China Science and Technology Park Dongxin road East Lake Development Zone 430074 Hubei Province, Wuhan City, No. 5 Patentee before: Fenghuo Communication Science &. Technology Co., Ltd. |