CN112479584B - Method for manufacturing optical fiber - Google Patents
Method for manufacturing optical fiber Download PDFInfo
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- CN112479584B CN112479584B CN202011377952.7A CN202011377952A CN112479584B CN 112479584 B CN112479584 B CN 112479584B CN 202011377952 A CN202011377952 A CN 202011377952A CN 112479584 B CN112479584 B CN 112479584B
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- rod
- flame
- extension
- prefabricated
- optical fiber
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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
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01225—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
- C03B37/01228—Removal of preform material
- C03B37/01237—Removal of preform material to modify the diameter by heat-polishing, e.g. fire-polishing
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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
- C03B37/025—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 application discloses a manufacturing method of an optical fiber, which comprises the following steps: 1) welding an auxiliary rod to one end of the prefabricated rod; 2) connecting the prefabricated rod with an extension rod, driving the prefabricated rod to enter a flame grinding device from top to bottom by the extension rod, and carrying out flame grinding operation on the prefabricated rod through the flame grinding device; 3) after the flame grinding is finished, the extension rod continuously moves downwards to drive the prefabricated rod to pass through the flame grinding device and enter a wire drawing furnace; 4) and carrying out wire drawing operation when the wire drawing furnace works. The method omits the processes of welding the second auxiliary rod and fusing the auxiliary rod, effectively simplifies the technical process and improves the processing efficiency.
Description
Technical Field
The invention relates to the field of optical fiber preforms, in particular to a manufacturing method of an optical fiber.
Background
During optical fiber manufacturing, need carry out the flame grinding operation to the prefabricated stick before the wire drawing process, before carrying out the flame grinding to the prefabricated stick, an auxiliary rod of butt fusion respectively at the both ends of prefabricated stick, then two chucks the auxiliary rod that the centre gripping corresponds respectively, when two chucks rotated with the same speed, drive prefabricated stick and auxiliary rod and rotate, carry out the high temperature firing to the prefabricated stick through mobilizable blowtorch, can clear away prefabricated stick surperficial impurity and dust, the inhomogeneous internal stress that distributes originally in the release prefabricated stick, make the tiny crack healing on prefabricated stick surface, avoid appearing disconnected fine at the wire drawing in-process. After flame grinding, before the wire drawing process, one of the auxiliary rods needs to be fused, and the rest auxiliary rod is used for being matched with a clamp of the wire drawing equipment to play a role in being clamped.
The above manufacturing method has the following drawbacks: two auxiliary rods need to be welded before flame grinding, one of the auxiliary rods needs to be fused after flame grinding, the whole process is complex, the consumed time is long, and the efficiency is low.
Disclosure of Invention
The present invention addresses the above-mentioned problems and provides a method of manufacturing an optical fiber.
The technical scheme adopted by the invention is as follows:
a method of manufacturing an optical fiber comprising the steps of:
1) welding an auxiliary rod to one end of the prefabricated rod;
2) connecting the prefabricated rod with an extension rod, driving the prefabricated rod to enter a flame grinding device from top to bottom by the extension rod, and carrying out flame grinding operation on the prefabricated rod through the flame grinding device;
3) after the flame grinding is finished, the extension rod continuously moves downwards to drive the prefabricated rod to pass through the flame grinding device and enter a wire drawing furnace;
4) and the wire drawing furnace works to perform wire drawing operation.
The method omits the processes of welding the second auxiliary rod and fusing the auxiliary rod, effectively simplifies the technical process and improves the processing efficiency.
In one embodiment of the present invention, the steps 2) to 3) are performed by an optical fiber drawing apparatus, where the optical fiber drawing apparatus includes:
the wire drawing furnace is provided with a wire drawing cavity;
the flame grinding device is positioned right above the wire drawing furnace and is used for carrying out flame grinding operation on the vertical prefabricated rod;
the lower end of the extension rod is used for connecting the auxiliary rod;
a clamp for clamping the upper end of the extension rod;
and the lifting mechanism is used for driving the clamp to move up and down.
In practical applications, the lifting mechanism may be an existing lifting mechanism, such as a linear motor, a rack and pinion structure, a ball screw pair structure, a conveyor belt mechanism, and so on.
In one embodiment of the present invention, the optical fiber connector further comprises a connecting rod, wherein the auxiliary rod moves away from the preform rod and has a first through hole, the lower end of the extending rod has a connecting groove, the lower end of the extending rod also has a second through hole penetrating through the extending rod, the second through hole intersects with the connecting groove, and the connecting rod is used for connecting the auxiliary rod and the extending rod through the first through hole and the second through hole.
The structure is convenient to connect and can ensure that the prefabricated rod is kept in a vertical state under the action of self gravity.
In one embodiment of the present invention, the flame polishing apparatus includes:
a mounting base;
the heating body is rotatably arranged on the mounting seat and is provided with a heating cavity which is arranged up and down;
the driving mechanism is used for driving the heating body to continuously rotate or rotate in a reciprocating manner relative to the mounting seat;
a plurality of flame shower nozzles wind the axis evenly distributed in heating chamber for heating prefabricated stick, carry out the flame to prefabricated stick and grind the operation.
The heating body can be driven to rotate continuously or rotate in a reciprocating mode through the driving mechanism, so that the plurality of flame spray heads can uniformly heat the prefabricated rod, and reliable flame grinding operation can be carried out. Set up longer extension stick and come to be connected with the upper end of auxiliary rod, extend the stick through the drive and reciprocate and can drive the perform and reciprocate like this, can make the perform pass the heating body after flame grinds the completion and get into the wire drawing furnace.
In practical application, the driving mechanism may be in the form of a motor and a gear set, where the heating body has a first gear on the outer side and a second gear meshed with the first gear on the outer side, and the motor is used to drive the second gear to rotate.
In one embodiment of the present invention, the mounting seat is provided with a bearing, and the heating body is rotatably matched with the mounting seat through the bearing.
In one embodiment of the present invention, the flame polishing apparatus further includes:
the upper end of the extension pipe vertically extends into the heating cavity, a gap is formed between the extension pipe and the heating cavity, and the extension pipe is positioned right above the wire drawing cavity;
a first detection sensor located at a sidewall of the extension pipe for detecting the preform;
the second detection sensor is positioned on the side wall of the extension pipe and below the first detection sensor;
the electric opening and closing door is arranged at the lower end of the extension pipe and can open or close the lower port of the extension pipe;
and the controller is used for controlling the driving mechanism and the flame nozzle to work according to the signal of the first detection sensor and controlling the electric opening and closing door to work according to the signal of the second detection sensor.
Through set up the extension pipe at heating chamber lower extreme and set up electronic opening and shutting door at the lower extreme of extension pipe, can prevent that the waste gas in the heating chamber from discharging to wire drawing stove one side in a large number when not influencing the operation that flame ground. Namely, the exhaust gas in the heating cavity can be effectively prevented from being discharged downwards by closing the extension pipe through the electric opening and closing.
Set up first detection sensor and second detection sensor and can realize automatic control, when the prefabricated excellent moves down first detection sensor position, first detection sensor detects the signal, shows that the flame grinding operation has been accomplished, control actuating mechanism and flame nozzle stop work, when the prefabricated excellent continues to move down and is detected by second detection sensor, the electronic door that opens and shuts of control is opened for the prefabricated excellent can pass the extension pipe and continue to move down and get into the wire drawing stove.
In one embodiment of the present invention, a tapered guiding portion is disposed on a side of the extension tube close to the heating chamber, and the tapered guiding portion is used for changing a moving direction of the gas coming out from the gap.
The conical guide part can prevent the waste gas in the heating cavity from entering the wire drawing furnace as far as possible by changing the flowing direction of the waste gas.
In one embodiment of the present invention, the flame spray nozzle includes a fuel pipe and a combustion supporting pipe, the fuel pipe is used for delivering carbon monoxide, and the combustion supporting pipe is used for delivering oxygen.
The carbon monoxide is used as fuel, so that the flame grinding can be carried out to prevent water vapor from generating to influence the subsequent wire drawing operation.
In one embodiment of the present invention, the heating chamber has a first collecting hood at an upper end thereof, and the first collecting hood is used for collecting the exhaust gas from the heating chamber; the lower end of the heating cavity is provided with a second collecting hood which is used for collecting the exhaust gas coming out from the gap.
Can effectively collect waste gas through first collection cover and second, prevent pollution and carbon monoxide poisoning.
The invention has the beneficial effects that: the method omits the processes of welding the second auxiliary rod and fusing the auxiliary rod, effectively simplifies the technical process and improves the processing efficiency.
Description of the drawings:
FIG. 1 is a schematic view of an optical fiber drawing apparatus according to example 1;
FIG. 2 is a schematic view of an optical fiber drawing apparatus according to example 2.
The figures are numbered:
1. an auxiliary rod; 2. performing a rod; 3. an extension bar; 4. a wire drawing furnace; 5. a flame grinding device; 6. a wire drawing chamber; 7. a clamp; 8. a lifting mechanism; 9. a connecting rod; 10. connecting grooves; 11. a second through hole; 12. a mounting base; 13. heating the body; 14. a heating cavity; 15. a drive mechanism; 16. a flame spray head; 17. an extension pipe; 18. a first detection sensor; 19. a second detection sensor; 20. an electric opening and closing door; 21. a tapered guide portion; 22. a first collection hood; 23. a second collection hood.
The specific implementation mode is as follows:
the present invention will be described in detail below with reference to the accompanying drawings.
Example 1
A method of manufacturing an optical fiber comprising the steps of:
1) welding an auxiliary rod 1 to one end of a prefabricated rod 2;
2) connecting the prefabricated rod 2 with an extension rod 3, driving the prefabricated rod 2 to enter a flame grinding device 5 from top to bottom by the extension rod 3, and carrying out flame grinding operation on the prefabricated rod 2 through the flame grinding device 5;
3) after the flame grinding is finished, the extension rod 3 continuously moves downwards to drive the prefabricated rod 2 to pass through the flame grinding device 5 and enter the wire drawing furnace 4;
4) the drawing furnace 4 works to perform drawing operation.
The method omits the processes of welding the second auxiliary rod 1 and fusing the auxiliary rod 1, effectively simplifies the technical process and improves the processing efficiency.
As shown in fig. 1, in the present embodiment, steps 2) to 3) are performed by an optical fiber drawing apparatus, and the optical fiber drawing apparatus of the present embodiment includes:
a drawing furnace 4 having a drawing chamber 6;
a flame grinding device 5 which is positioned right above the drawing furnace 4 and is used for carrying out flame grinding operation on the vertical prefabricated rod 2;
the lower end of the extension rod 3 is used for connecting the auxiliary rod 1;
a clamp 7 for clamping the upper end of the extension bar 3;
and the lifting mechanism 8 is used for driving the clamp 7 to move up and down.
In practical applications, the lifting mechanism 8 may be an existing lifting mechanism 8, such as a linear motor, a rack and pinion structure, a ball screw pair structure, a belt conveyor mechanism, and so on.
As shown in fig. 1, in the present embodiment, a connection rod 9 is further included, the auxiliary rod 1 moving away from the preform 2 has a first through hole (not shown), the lower end of the extension rod 3 has a connection groove 10, the lower end of the extension rod 3 further has a second through hole 11 penetrating the extension rod 3, the second through hole 11 intersects the connection groove 10, and the connection rod 9 is used for connecting the auxiliary rod 1 and the extension rod 3 through the first through hole and the second through hole 11. This structure is convenient to connect and enables the preform 2 to be maintained in a vertical state under the action of its own weight.
As shown in fig. 1, in the present embodiment, the flame polishing apparatus 5 includes:
a mounting base 12;
the heating body 13 is rotatably arranged on the mounting seat 12, and the heating body 13 is provided with a heating cavity 14 which is arranged up and down;
a driving mechanism 15 for driving the heating body 13 to rotate continuously or rotate reciprocally relative to the mounting base 12;
a plurality of flame spray nozzles 16, evenly distributed around the axis of the heating chamber 14, for heating the preform 2 and performing a flame grinding operation on the preform 2.
The heating body 13 can be driven to rotate continuously or rotate reciprocally by the driving mechanism 15, so that the preform 2 can be heated uniformly by the plurality of flame spray heads 16, and reliable flame grinding operation can be performed. Set up longer extension stick 3 and come to be connected with the upper end of auxiliary rod 1, extend stick 3 through the drive like this and reciprocate and can drive prefabricated excellent 2 and reciprocate, can make prefabricated excellent 2 pass heating body 13 and get into wire drawing stove 4 after flame grinds the completion.
In practice, the driving mechanism 15 may be in the form of a motor and a gear set, and the heating body 13 has a first gear on the outer side and a second gear engaged with the first gear on the outer side, and the motor is used to drive the second gear to rotate.
In this embodiment, the mounting seat 12 is provided with a bearing, and the heating body 13 is rotatably engaged with the mounting seat 12 through the bearing.
As shown in fig. 1, in the present embodiment, the flame polishing apparatus 5 further includes:
the upper end of the extension pipe 17 vertically extends into the heating cavity 14, a gap is formed between the extension pipe 17 and the heating cavity 14, and the extension pipe 17 is positioned right above the wire drawing cavity 6;
a first detection sensor 18, provided at a side wall of the extension pipe 17, for detecting the preform 2;
a second detection sensor 19 located on the side wall of the extension pipe 17 and below the first detection sensor 18;
an electric opening/closing door 20 installed at a lower end of the extension pipe 17 and capable of opening or closing a lower port of the extension pipe 17;
and a controller (not shown) for controlling the operation of the driving mechanism 15 and the flame spray head 16 according to the signal of the first detection sensor 18, and for controlling the operation of the electric opening/closing door 20 according to the signal of the second detection sensor 19.
By providing the extension pipe 17 at the lower end of the heating chamber 14 and providing the electric opening/closing door 20 at the lower end of the extension pipe 17, it is possible to prevent a large amount of exhaust gas in the heating chamber 14 from being discharged to the drawing furnace 4 side without affecting the operation of flame polishing. That is, the exhaust gas in the heating chamber 14 can be effectively prevented from being discharged downward by closing the extension pipe 17 through the electric switch.
The arrangement of the first detection sensor 18 and the second detection sensor 19 enables automatic control to be achieved, when the preform 2 moves down to the position of the first detection sensor 18, the first detection sensor 18 detects a signal indicating that the flame grinding operation has been completed, the driving mechanism 15 and the flame spray head 16 are controlled to stop working, and when the preform 2 moves down continuously and is detected by the second detection sensor 19, the electric opening/closing door 20 is controlled to open, so that the preform 2 can pass through the extension pipe 17 and move down continuously into the drawing furnace 4.
As shown in fig. 1, in the present embodiment, the extension pipe 17 has a tapered guide portion 21 on a side close to the heating chamber 14, and the tapered guide portion 21 is used for changing the moving direction of the gas coming out from the gap. The tapered guide portion 21 can prevent the exhaust gas in the heating chamber 14 from entering the drawing furnace 4 as much as possible by changing the flow direction of the exhaust gas.
Example 2
As shown in fig. 2, the present embodiment is different from embodiment 1 in that a flame spray 16 includes a fuel pipe for delivering carbon monoxide and a combustion supporting pipe for delivering oxygen; the upper end of the heating chamber 14 has a first collection hood 22, the first collection hood 22 is used for collecting the exhaust gas from the heating chamber 14; the lower end of the heating chamber 14 has a second collecting hood 23, the second collecting hood 23 being for collecting the exhaust air coming out of the gap.
Carbon monoxide is used as fuel, so that the phenomenon that the subsequent wire drawing operation is influenced by water vapor generated during flame grinding can be prevented; the exhaust gas can be effectively collected by the first and second collecting hoods 22 and 23, preventing pollution and carbon monoxide poisoning.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, which are directly or indirectly applied to other related technical fields, are also included in the scope of the present invention.
Claims (5)
1. A method of manufacturing an optical fiber, comprising the steps of:
1) welding an auxiliary rod to one end of the prefabricated rod;
2) connecting the prefabricated rod with an extension rod, driving the prefabricated rod to enter a flame grinding device from top to bottom by the extension rod, and carrying out flame grinding operation on the prefabricated rod through the flame grinding device;
3) after the flame grinding is finished, the extension rod continuously moves downwards to drive the prefabricated rod to pass through the flame grinding device and enter a wire drawing furnace;
4) carrying out wire drawing operation when the wire drawing furnace works;
the steps 2) to 3) are implemented by optical fiber drawing equipment, and the optical fiber drawing equipment comprises:
a drawing furnace having a drawing chamber;
the flame grinding device is positioned right above the wire drawing furnace and is used for carrying out flame grinding operation on the vertical prefabricated rod;
the lower end of the extension rod is used for connecting the auxiliary rod;
a clamp for clamping the upper end of the extension rod;
the lifting mechanism is used for driving the clamp to move up and down;
the flame grinding device includes:
a mounting base;
the heating body is rotatably arranged on the mounting seat and is provided with a heating cavity which is arranged up and down;
the driving mechanism is used for driving the heating body to continuously rotate or reciprocally rotate relative to the mounting seat;
the flame nozzles are uniformly distributed around the axis of the heating cavity and are used for heating the prefabricated rod and carrying out flame grinding operation on the prefabricated rod;
the heating body is in running fit with the mounting seat through the bearing;
the flame grinder further includes:
the upper end of the extension pipe vertically extends into the heating cavity, a gap is formed between the extension pipe and the heating cavity, and the extension pipe is positioned right above the wire drawing cavity;
a first detection sensor located at a sidewall of the extension pipe for detecting the preform;
the second detection sensor is positioned on the side wall of the extension pipe and below the first detection sensor;
the electric opening and closing door is arranged at the lower end of the extension pipe and can open or close the lower port of the extension pipe;
and the controller is used for controlling the driving mechanism and the flame nozzle to work according to the signal of the first detection sensor and controlling the electric opening and closing door to work according to the signal of the second detection sensor.
2. The method of manufacturing an optical fiber according to claim 1, further comprising a connecting rod, wherein the movement of the subsidiary rod away from the preform rod has a first through hole, the lower end of the extension rod has a connecting groove, the lower end of the extension rod further has a second through hole penetrating the extension rod, the second through hole intersecting the connecting groove, and the connecting rod is used for connecting the subsidiary rod to the extension rod through the first through hole and the second through hole.
3. The method of manufacturing an optical fiber according to claim 1, wherein a side of the extension pipe adjacent to the heating chamber has a tapered guide portion for changing a moving direction of the gas coming out of the gap.
4. The method of manufacturing an optical fiber according to claim 1, wherein the flame spray head includes a fuel pipe for transporting carbon monoxide and a combustion supporting pipe for transporting oxygen.
5. The method of manufacturing an optical fiber according to claim 4, wherein the heating chamber has a first collection hood at an upper end thereof for collecting exhaust gas from the heating chamber; the lower end of the heating chamber has a second collection hood for collecting exhaust air from the gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011377952.7A CN112479584B (en) | 2020-11-30 | 2020-11-30 | Method for manufacturing optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011377952.7A CN112479584B (en) | 2020-11-30 | 2020-11-30 | Method for manufacturing optical fiber |
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| CN112479584A CN112479584A (en) | 2021-03-12 |
| CN112479584B true CN112479584B (en) | 2022-07-15 |
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| CN202011377952.7A Active CN112479584B (en) | 2020-11-30 | 2020-11-30 | Method for manufacturing optical fiber |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113754271A (en) * | 2021-09-01 | 2021-12-07 | 富通集团（嘉善）通信技术有限公司 | Optical fiber drawing apparatus |
| CN114409242B (en) * | 2021-12-01 | 2023-08-18 | 浙江富通光纤技术有限公司 | Process for manufacturing optical fiber preform and optical fiber |
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| JPS5223950A (en) * | 1975-08-16 | 1977-02-23 | Heraeus Quarzschmelze | Semiiproduct in optical fiber manufacture* method of manufacturing the same and optical fiber manufactured from the samiiproduct |
| CN105776837A (en) * | 2016-03-31 | 2016-07-20 | 杭州富通通信技术股份有限公司 | Production method of optical fiber |
| CN105859123A (en) * | 2016-03-31 | 2016-08-17 | 杭州富通通信技术股份有限公司 | An optical fiber manufacturing process |
| CN108996901A (en) * | 2018-08-08 | 2018-12-14 | 杭州富通通信技术股份有限公司 | The manufacturing method of optical fiber |
| CN109369004A (en) * | 2018-12-19 | 2019-02-22 | 江苏亨通光纤科技有限公司 | Optical fiber annealing extension tube |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7430881B2 (en) * | 2003-01-10 | 2008-10-07 | Weatherford/Lamb, Inc. | Method of making an optical fiber attachment device |
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2020
- 2020-11-30 CN CN202011377952.7A patent/CN112479584B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5223950A (en) * | 1975-08-16 | 1977-02-23 | Heraeus Quarzschmelze | Semiiproduct in optical fiber manufacture* method of manufacturing the same and optical fiber manufactured from the samiiproduct |
| CN105776837A (en) * | 2016-03-31 | 2016-07-20 | 杭州富通通信技术股份有限公司 | Production method of optical fiber |
| CN105859123A (en) * | 2016-03-31 | 2016-08-17 | 杭州富通通信技术股份有限公司 | An optical fiber manufacturing process |
| CN108249752A (en) * | 2016-03-31 | 2018-07-06 | 杭州富通通信技术股份有限公司 | The manufacturing method of optical fiber |
| CN108996901A (en) * | 2018-08-08 | 2018-12-14 | 杭州富通通信技术股份有限公司 | The manufacturing method of optical fiber |
| CN109369004A (en) * | 2018-12-19 | 2019-02-22 | 江苏亨通光纤科技有限公司 | Optical fiber annealing extension tube |
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