CN105837026A - Stretching device for optical-fiber base material and working method thereof - Google Patents
Stretching device for optical-fiber base material and working method thereof Download PDFInfo
- Publication number
- CN105837026A CN105837026A CN201610443063.3A CN201610443063A CN105837026A CN 105837026 A CN105837026 A CN 105837026A CN 201610443063 A CN201610443063 A CN 201610443063A CN 105837026 A CN105837026 A CN 105837026A
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- Prior art keywords
- heater
- parent material
- fibre parent
- gas
- flow
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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
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/03—Drawing means, e.g. drawing drums ; Traction or tensioning devices
-
- 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
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
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- Engineering & Computer Science (AREA)
- 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 provides a stretching device for an optical-fiber base material and a working method thereof. The stretching device for the optical-fiber base material comprises gas pipelines, graphitic heat preserving members, graphitic heating members, gas flow buffers, gas flow output and control devices and electrostatic dust removing devices, wherein the gas pipelines are located on the side edges of a furnace body; the graphitic heat preserving members are located in the furnace body and further approach the gas pipelines; the graphitic heating members are located in the furnace body and further approach the graphitic heat preserving members; the gas flow buffers are located in the furnace body and are further connected with the gas pipelines; the gas flow output and control devices are connected with the gas flow buffers and further approach the upper end of the optical-fiber base material; the electrostatic dust removing devices are located in the furnace body and further approach the lower end of the optical-fiber base material; the optical-fiber base material is located between the graphitic heating members. According to the stretching device for the optical-fiber base material, which is provided by the invention, foreign particles in the furnace body are reduced by utilizing an electrostatic dust removing method; through a method for decreasing the temperature difference of a gas flow in the furnace, the generation of a convection phenomenon of a gas in the furnace body is restrained; through changing the direction, the angle and the flow rate of the gas flow, a gas protective layer is formed on the surface of the optical-fiber base material, and the possibility that the optical-fiber base material is polluted in a stretching process is lowered.
Description
Technical field
The invention belongs to preform manufacturing technology field, particularly relate to a kind of optical fibre parent material stretch device and work side thereof
Method.
Background technology
In recent years, along with the raising of fibre parent material manufacturing technology, manufacture large-diameter fibre-optical mother metal and be possibly realized.Thus, when
The method of front employing has, such as: VAD method (Vapour Axial Deposition, vapour phase axial deposition technique) made
The large-diameter fibre-optical mother metal made carries out stretching, undergauge, so with OVD method (Outside Vapour Deposition,
Pipe outside vapor deposition) make fine glass particle face deposited thereon be derived from fibre parent material, and this fibre parent material is carried out
The method of wire drawing.
Fibre parent material softens under hot environment in heating furnace, and thin footpath, fibre parent material front end is also stretched, for making optical fiber female
Material reaches softening temperature, and the parts of heating furnace use the graphite of excellent heat resistance.This graphite is sent out in the oxygenous atmosphere of high temperature
Life aoxidizes and consumes.In order to prevent above-mentioned situation, the inside of heating furnace need to be remained the rare gas such as argon gas or helium or
Nitrogen atmosphere.
Although said method prevents graphite oxidation, but because the change of fluid and pressure still can occur cavitation, graphite piece
Impaired, produce impurity particle, simultaneously because of the gaseous exchange phenomenon in body of heater, gas carrying impurity particle adhered optical fibers mother metal
Surface, makes fibre parent material introduce impurity, causes the increase of Rayleigh scattering.
Summary of the invention
It is contaminated during it is an object of the invention to provide a kind of reduction optical fibre parent material stretch, light in drawing process can be reduced
Fine mother metal is easily polluted by the external foreign matters, the optical fibre parent material stretch device of the Rayleigh scattering that minimizing causes because of impurity and method of work thereof.
The present invention provides a kind of optical fibre parent material stretch device, is positioned at the body of heater manufacturing preform, optical fibre parent material stretch
Device includes: is positioned at the gas piping of body of heater side, is positioned at body of heater and near the graphite heat preservation member of this gas piping, position
In body of heater and near this graphite heat preservation member graphite heating part, be positioned at this body of heater and the air-flow being connected with this gas piping
Buffer is connected with this air-flow buffer device and the air-flow of close fibre parent material upper end exports and controls device and be positioned at stove
The electrostatic precipitator of internal and close fibre parent material lower end；Wherein, described fibre parent material be positioned at described graphite heating part it
Between.
Preferably, described gas piping is circular gas pipeline.
Preferably, described graphite heat preservation member is cylindrical graphite heat preservation member.
Preferably, described gas piping is wrapped in outside described graphite heat preservation member in the shape of a spiral.
Preferably, described graphite heating part is cylindrical graphite heating member.
Preferably, described air-flow buffer device is cylindrical streams buffer.
Preferably, described air-flow exports and control device is rounded and is uniformly distributed in the bottom of described air-flow buffer device.
The present invention also provides for the method for work of a kind of optical fibre parent material stretch device, and it comprises the steps:
S1: the porch outside body of heater is passed through nitrogen in gas piping；Meanwhile, graphite heating part begins to warm up, body of heater
Interior temperature raises, and body of heater is incubated by graphite heat preservation member, and the nitrogen in gas piping is entered by heat by thermaltransmission mode
Row heating, make the temperature of gas temperature in air-flow buffer device and body of heater close to or slightly below stove body temperature；
S2: meanwhile, nitrogen is buffered by air-flow buffer device, changes air-flow by external control system and exports and control dress
The direction put and angle, and control gas flow, form the gas from gas cushion toward electrostatic precipitator direction in body of heater
Stream flowing；
S3: form gas blanket on fibre parent material；
S4: under air-flow environment, fibre parent material is stretched, undergauge.
Preferably, before described step S1, also comprise the steps:
S11: the porch outside body of heater is passed through nitrogen, external control system regulation air-flow output and control in gas piping
The direction of system dress and angle, and control the nitrogen flow being passed through in gas piping；Nitrogen to carrying out gas flow purging in body of heater,
Open electrostatic precipitator simultaneously, remove the impurity particle in body of heater；
S12: first, closes electrostatic precipitator, eliminates the electrostatic in body of heater；Then, fibre parent material is placed on stove
The center of body.
Preferably, also comprise the steps: between described step S3 and step S4 to open electrostatic precipitator, remove stove
Internal newly-generated impurity particle.
Optical fibre parent material stretch device of the present invention, the method utilizing electrostatic precipitation, reduces the impurity particle in body of heater；By subtracting
The generation of gaseous exchange phenomenon in the method suppression body of heater of the air-flow temperature difference in few body of heater；By changing the direction of air-flow, angle
With the size of flow, form gas blanket on fibre parent material surface, reduce impurity particle and contact with fibre parent material, reduce
Fibre parent material is contaminated in drawing process.
Accompanying drawing explanation
Fig. 1 is the optical fibre parent material stretch device of the present invention profile at the body of heater manufacturing preform；
Fig. 2 is the air-flow buffer device of optical fibre parent material stretch device shown in Fig. 1 and air-flow output and the front view controlling device；
Fig. 3 is the front view of the electrostatic precipitator of optical fibre parent material stretch device shown in Fig. 1；
Fig. 4 is the profile of a wherein course of work of optical fibre parent material stretch device shown in Fig. 1；
Fig. 5 is the profile of a wherein course of work of optical fibre parent material stretch device shown in Fig. 1.
Detailed description of the invention
With embodiment, the present invention is further described below in conjunction with the accompanying drawings.
The present invention discloses a kind of optical fibre parent material stretch device 100, and this optical fibre parent material stretch device 100 is positioned at manufacture predispersed fiber
In the body of heater 200 of system rod, fibre parent material 7 is fixed on the centre of body of heater 200.
Referring to shown in Fig. 1, optical fibre parent material stretch device 100 includes: be positioned at body of heater 200 side gas piping 1,
Be positioned at body of heater 200 and near this gas piping 1 graphite heat preservation member 2, be positioned at body of heater 200 and near this graphite guarantor
Temperature part 2 graphite heating part 3, be positioned at this body of heater 200 and the air-flow buffer device 4 being connected with this gas piping 1 and
This air-flow buffer device 4 connects and the air-flow of close fibre parent material 7 upper end exports and controls device 5 and be positioned at body of heater 200
The electrostatic precipitator 6 of interior and close fibre parent material 7 lower end.
Gas piping 1 is circular gas pipeline 1, and graphite heat preservation member 2 is cylindrical graphite heat preservation member, graphite heating part 3
For cylindrical graphite heating member.
Gas piping 1 is wrapped in outside graphite heat preservation member 2 in the shape of a spiral；This gas piping 1 is connected with air-flow buffer device 4；
Fibre parent material 7 is between this graphite heating part 3.
Referring to shown in Fig. 2, air-flow buffer device 4 is cylindrical streams buffer, and air-flow output and control device 5 are in circle
Shape and be uniformly distributed in the bottom of air-flow buffer device 4, air-flow output and control device 5 and can be carried out by external control system
Various dimensions direction and angular adjustment, and the control of gas flow can be carried out by external control system；Refer to shown in Fig. 3,
Electrostatic precipitator 6 is rounded symmetrical along skew wall bottom body of heater 200.
This optical fibre parent material stretch device utilizes electrostatic precipitator 6 to remove the impurity particle in body of heater 200, by changing gas
The size of stream output and the direction of control device 5 output gas flow and throughput suppresses the gaseous exchange phenomenon in body of heater,
Fibre parent material 7 surface forms gas retaining layer, protects graphite heat preservation member 2 and graphite heating part 3 simultaneously, prevents
Oxidation.
The method of work of this optical fibre parent material stretch device, comprises the steps:
S1: the porch outside body of heater is passed through nitrogen in gas piping；Meanwhile, graphite heating part begins to warm up, body of heater
Interior temperature raises, and body of heater is incubated by graphite heat preservation member, and the nitrogen in gas piping is entered by heat by thermaltransmission mode
Row heating, make the temperature of gas temperature in air-flow buffer device and body of heater close to or slightly below stove body temperature；
S2: meanwhile, nitrogen is buffered by air-flow buffer device, changes air-flow by external control system and exports and control dress
The direction put and angle, and control gas flow, form the gas from gas cushion toward electrostatic precipitator direction in body of heater
Stream flowing；
S3: form gas blanket on fibre parent material；
S4: under air-flow environment, fibre parent material is stretched, undergauge.
Wherein, before described step S1, also comprise the steps:
S11: the porch outside body of heater is passed through nitrogen, external control system regulation air-flow output and control in gas piping
The direction of system dress and angle, and control the nitrogen flow being passed through in gas piping；Nitrogen to carrying out gas flow purging in body of heater,
Open electrostatic precipitator simultaneously, remove the impurity particle in body of heater；
S12: first, closes electrostatic precipitator, eliminates the electrostatic in body of heater；Then, fibre parent material is placed on stove
The center of body.
Wherein, also comprise the steps: between described step S3 and step S4 to open electrostatic precipitator, remove body of heater
Interior newly-generated impurity particle.
The method of work of this optical fibre parent material stretch device has two embodiments.
First embodiment: during work, the method for work of this optical fibre parent material stretch device, comprise the steps:
The first step: the porch 8 outside body of heater 200 is passed through nitrogen, external control system regulation gas in gas piping 1
Stream exports and controls direction and the angle of device 5, and controls to be passed through the nitrogen flow in gas piping 1；Nitrogen is to body of heater
Carry out gas flow purging in 200, open electrostatic precipitator 6 simultaneously, remove the impurity particle in body of heater；
Second step: first, closes electrostatic precipitator 6, and eliminates the electrostatic in body of heater 200；Then by fibre parent material
7 centers being placed on body of heater 200；
3rd step: be passed through nitrogen in gas piping 1 in porch 8；Meanwhile, graphite heating part 3 begins to warm up, stove
In body 200, temperature raises, and body of heater 200 is incubated by graphite heat preservation member 2, and heat passes through thermaltransmission mode to flue
Nitrogen in road 1 heats, and makes the gas temperature in air-flow buffer device 4 close with the temperature of body of heater 200 or is slightly below
Stove body temperature；
4th step: meanwhile, nitrogen is buffered by air-flow buffer device 4, by external control system change air-flow output and
Control direction and the angle of device 5, and control gas flow, formed from gas cushion 4 toward electrostatic in making body of heater 200
The air current flow in dust arrester 6 direction；
5th step: form gas blanket on fibre parent material 7, reduces impurity particle and contacts with fibre parent material；
6th step: under air-flow environment, fibre parent material 7 is stretched, undergauge.
Second embodiment: during work, the method for work of this optical fibre parent material stretch device, comprise the steps:
The first step: the porch 8 outside body of heater 200 is passed through nitrogen, external control system regulation gas in gas piping 1
Stream exports and controls direction and the angle of device 5, and controls to be passed through the nitrogen flow in gas piping 1；Nitrogen is to body of heater
Carry out gas flow purging in 200, open electrostatic precipitator 6 simultaneously, remove the impurity particle in body of heater；
Second step: first, closes electrostatic precipitator 6, and eliminates the electrostatic in body of heater 200；Then by fibre parent material
7 centers being placed on body of heater 200；
3rd step: be passed through nitrogen in gas piping 1 in porch 8；Meanwhile, graphite heating part 3 begins to warm up, stove
In body 200, temperature raises, and body of heater 200 is incubated by graphite heat preservation member 2, and heat passes through thermaltransmission mode to flue
Nitrogen in road 1 heats, and makes the gas temperature in air-flow buffer device 4 close with the temperature of body of heater 200 or is slightly below
Stove body temperature；
4th step: meanwhile, nitrogen is buffered by air-flow buffer device 4, by external control system change air-flow output and
Control direction and the angle of device 5, and control gas flow, formed from gas cushion 4 toward electrostatic in making body of heater 200
The air current flow in dust arrester 6 direction；
5th step: form gas blanket on fibre parent material 7, reduces impurity particle and contacts with fibre parent material；
6th step: open electrostatic precipitator 6, impurity particle newly-generated in removing body of heater 200；
7th step: under air-flow environment, fibre parent material 7 is stretched, undergauge.
The difference of above-mentioned two working Examples is: the second embodiment adds electrostatic precipitator 6 and removes in body of heater 200
The step of newly-generated impurity particle.
Optical fibre parent material stretch device of the present invention, the method utilizing electrostatic precipitation, reduces the impurity particle in body of heater；By subtracting
The generation of gaseous exchange phenomenon in the method suppression body of heater of the air-flow temperature difference in few body of heater；By changing the direction of air-flow, angle
With the size of flow, form gas blanket on fibre parent material surface, reduce impurity particle and contact with fibre parent material, reduce
Fibre parent material is contaminated in drawing process.
The preferred embodiment of the present invention described in detail above, but the present invention is not limited to the tool in above-mentioned embodiment
Body details, in the technology concept of the present invention, can carry out multiple equivalents to technical scheme, this
A little equivalents belong to protection scope of the present invention.
Claims (10)
1. an optical fibre parent material stretch device, is positioned at the body of heater manufacturing preform, it is characterised in that: optical fiber is female
Material stretching device includes: is positioned at the gas piping of body of heater side, is positioned at body of heater and the graphite insulation near this gas piping
Part, be positioned at body of heater and near this graphite heat preservation member graphite heating part, be positioned at this body of heater and be connected with this gas piping
Air-flow buffer device be connected with this air-flow buffer device and near fibre parent material upper end air-flow output and control device and
It is positioned at body of heater and the electrostatic precipitator near fibre parent material lower end；Wherein, described fibre parent material is positioned at described graphite and adds
Between warmware.
Optical fibre parent material stretch device the most according to claim 1, it is characterised in that: described gas piping is circular
Gas piping.
Optical fibre parent material stretch device the most according to claim 1, it is characterised in that: described graphite heat preservation member is circle
Cylindricality graphite heat preservation member.
4. according to the optical fibre parent material stretch device described in claim 1 or 3, it is characterised in that: described gas piping in
Helical form is wrapped in outside described graphite heat preservation member.
Optical fibre parent material stretch device the most according to claim 1, it is characterised in that: described graphite heating part is circle
Cylindricality graphite heating member.
Optical fibre parent material stretch device the most according to claim 1, it is characterised in that: described air-flow buffer device is circle
Columnar airflow buffer.
Optical fibre parent material stretch device the most according to claim 1, it is characterised in that: the output of described air-flow and control
Device is rounded and is uniformly distributed in the bottom of described air-flow buffer device.
8. according to the method for work of the arbitrary described optical fibre parent material stretch device of claim 1-7, it is characterised in that its bag
Include following steps:
S1: the porch outside body of heater is passed through nitrogen in gas piping；Meanwhile, graphite heating part begins to warm up, body of heater
Interior temperature raises, and body of heater is incubated by graphite heat preservation member, and the nitrogen in gas piping is entered by heat by thermaltransmission mode
Row heating, make the temperature of gas temperature in air-flow buffer device and body of heater close to or slightly below stove body temperature；
S2: meanwhile, nitrogen is buffered by air-flow buffer device, changes air-flow by external control system and exports and control dress
The direction put and angle, and control gas flow, form the gas from gas cushion toward electrostatic precipitator direction in body of heater
Stream flowing；
S3: form gas blanket on fibre parent material；
S4: under air-flow environment, fibre parent material is stretched, undergauge.
The method of work of optical fibre parent material stretch device the most according to claim 8, it is characterised in that: described step
Before S1, also comprise the steps:
S11: the porch outside body of heater is passed through nitrogen, external control system regulation air-flow output and control in gas piping
The direction of system dress and angle, and control the nitrogen flow being passed through in gas piping；Nitrogen to carrying out gas flow purging in body of heater,
Open electrostatic precipitator simultaneously, remove the impurity particle in body of heater；
S12: first, closes electrostatic precipitator, eliminates the electrostatic in body of heater；Then, fibre parent material is placed on stove
The center of body.
The method of work of optical fibre parent material stretch device the most according to claim 8 or claim 9, it is characterised in that: described
Also comprise the steps: between step S3 and step S4 to open electrostatic precipitator, impurity newly-generated in removing body of heater
Particle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610443063.3A CN105837026A (en) | 2016-06-17 | 2016-06-17 | Stretching device for optical-fiber base material and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610443063.3A CN105837026A (en) | 2016-06-17 | 2016-06-17 | Stretching device for optical-fiber base material and working method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105837026A true CN105837026A (en) | 2016-08-10 |
Family
ID=56576993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610443063.3A Pending CN105837026A (en) | 2016-06-17 | 2016-06-17 | Stretching device for optical-fiber base material and working method thereof |
Country Status (1)
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| CN (1) | CN105837026A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108672087A (en) * | 2018-06-25 | 2018-10-19 | 江苏斯德雷特通光光纤有限公司 | Electrostatic precipitator in a kind of prefabricated rods extension process |
| CN111995231A (en) * | 2020-09-03 | 2020-11-27 | 江苏亨通光纤科技有限公司 | Drawing equipment and method for deep fluorine-doped capillary tube for beam combiner |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557426A (en) * | 2012-03-07 | 2012-07-11 | 中天科技光纤有限公司 | Optical fiber purifying device and optical fiber purifying method |
| CN103304135A (en) * | 2013-07-05 | 2013-09-18 | 江苏法尔胜光子有限公司 | Optical fiber drawing method for large-diameter optical fiber preform rod |
| CN205099571U (en) * | 2015-11-13 | 2016-03-23 | 成都中住光纤有限公司 | High pressure argon gas optical fiber wire drawing stove |
| CN205687797U (en) * | 2016-06-17 | 2016-11-16 | 江苏亨通光导新材料有限公司 | Optical fibre parent material stretch device |
-
2016
- 2016-06-17 CN CN201610443063.3A patent/CN105837026A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557426A (en) * | 2012-03-07 | 2012-07-11 | 中天科技光纤有限公司 | Optical fiber purifying device and optical fiber purifying method |
| CN103304135A (en) * | 2013-07-05 | 2013-09-18 | 江苏法尔胜光子有限公司 | Optical fiber drawing method for large-diameter optical fiber preform rod |
| CN205099571U (en) * | 2015-11-13 | 2016-03-23 | 成都中住光纤有限公司 | High pressure argon gas optical fiber wire drawing stove |
| CN205687797U (en) * | 2016-06-17 | 2016-11-16 | 江苏亨通光导新材料有限公司 | Optical fibre parent material stretch device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108672087A (en) * | 2018-06-25 | 2018-10-19 | 江苏斯德雷特通光光纤有限公司 | Electrostatic precipitator in a kind of prefabricated rods extension process |
| CN108672087B (en) * | 2018-06-25 | 2024-02-02 | 江苏斯德雷特光纤科技有限公司 | Electrostatic dust collection device in preform extension process |
| CN111995231A (en) * | 2020-09-03 | 2020-11-27 | 江苏亨通光纤科技有限公司 | Drawing equipment and method for deep fluorine-doped capillary tube for beam combiner |
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Application publication date: 20160810 |