CN108383375B - Optical fiber drawing annealing device and optical fiber - Google Patents
Optical fiber drawing annealing device and optical fiber Download PDFInfo
- Publication number
- CN108383375B CN108383375B CN201810145788.3A CN201810145788A CN108383375B CN 108383375 B CN108383375 B CN 108383375B CN 201810145788 A CN201810145788 A CN 201810145788A CN 108383375 B CN108383375 B CN 108383375B
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- China
- Prior art keywords
- annealing
- optical fiber
- pipe
- inert gas
- movable
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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
- C03B37/025—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
- C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
- C03B37/02718—Thermal treatment of the fibre during the drawing process, e.g. cooling
- C03B37/02727—Annealing or re-heating
-
- 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
- C03B37/10—Non-chemical treatment
-
- 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
-
- 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
- C03B37/029—Furnaces therefor
-
- 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
The invention discloses an optical fiber drawing annealing device and an optical fiber, comprising a drawing furnace, a fixed annealing pipe, a movable annealing pipe and a driving part for driving the movable annealing pipe to move, wherein the movable annealing pipe comprises an outer pipe, a graphite inner bushing fixedly arranged in the outer pipe, and a first blowing part which is arranged on the lower end part of the outer pipe and supplies inert gas into the movable annealing pipe, the first blowing part comprises a shell and a flow guide block arranged in the shell, and an upper flow guide channel and a lower flow guide channel which are respectively used for conveying the inert gas to the upper end and the lower end of the movable annealing pipe are arranged on the flow guide block. According to the invention, the internal stress of the optical fiber is reduced, microcracks are reduced, and the optical fiber attenuation is finally reduced, meanwhile, silicon carbide deposited in the drawing furnace and the annealing pipe orifice can be collected in the waste gas collecting plate at the mouth of the drawing furnace through lower blowing, so that the optical fiber strength and the drawing efficiency are effectively improved.
Description
Technical Field
The invention relates to optical fiber production equipment, in particular to an optical fiber drawing and annealing device and an optical fiber.
Background
The current domestic optical fiber drawing process is basically stable, the length of a temperature field of a common drawing annealing device is shorter, the lowest temperature in the temperature field is higher, as in the annealing device disclosed in the patent application with publication number CN106019465A, inert gas enters from above the drawing furnace, and in the descending process of the inert gas, the temperature of the temperature field is higher and higher, so that the temperature of the temperature field is not gradually reduced from top to bottom, the length of the temperature field is shorter, the lowest temperature in the temperature field is higher, and the temperature of the optical fiber when the optical fiber exits from an annealing tube is still kept higher. However, the requirement of society on long-distance large-communication capacity is forced, and fiber drawing manufacturers further optimize the drawing process to reduce fiber attenuation. The most fundamental approach is to reduce the internal stress of the fiber to reduce microcracking. Many manufacturers contemplate reducing internal stress by sufficiently annealing the fiber to reduce surface microcracking. Some manufacturers install annealing furnaces under the annealing pipes, so that two defects are caused: 1. the installed annealing furnace occupies space. 2. The annealing furnace is heated to waste electric energy.
Disclosure of Invention
The invention aims to provide a drawing annealing device for fully annealing an optical fiber, which is energy-saving and convenient.
In order to achieve the above purpose, the invention adopts the following technical scheme: the utility model provides an optical fiber drawing annealing device, it includes the wire drawing stove, connect in the fixed annealing pipe of wire drawing stove below, it still include sealing connection in fixed annealing pipe below be used for prolonging the removal annealing temperature field the drive division that removes the annealing pipe removed, remove the annealing pipe include outer tube, fixed mounting in graphite inner liner in the outer tube and install in on the outer tube lower tip and to remove the first portion of blowing of annealing intraductal supplies inert gas, first portion of blowing include the shell, install in the water conservancy diversion piece in the shell, be equipped with on the water conservancy diversion piece respectively with inert gas goes up water conservancy diversion passageway and the lower water conservancy diversion passageway of removing annealing pipe upper end and lower extreme transport.
Preferably, the driving part comprises a screw rod driving mechanism, the screw rod driving mechanism comprises a screw rod and a nut in threaded connection with the screw rod, and the driving mechanism further comprises a connecting piece connected between the nut of the screw rod mechanism and the outer tube.
Further, the connecting piece comprises a first connecting rod and a second connecting rod which are rotatably connected and can be locked, the first connecting rod and the second connecting rod are respectively rotatably connected with the outer tube and the nut, and the first connecting rod and the outer tube, the second connecting rod and the nut are respectively fixed in relative positions through locking pins.
Preferably, a second blowing part is arranged below the wire drawing furnace, and the density of the inert gas blown by the second blowing part is greater than that of the inert gas blown by the first blowing part.
Preferably, the flow rate of the inert gas in the upper diversion channel is larger than that of the inert gas in the lower diversion channel.
Preferably, the included angle between the upper diversion channel and the axis of the graphite inner bushing is 20-40 degrees.
Preferably, the included angle between the lower diversion channel and the axis of the graphite inner bushing is 40-60 degrees.
Preferably, the bottom cover of the outer shell is provided with a through hole for optical fibers, the lower end of the first blowing part is provided with a shutter for controlling the size of air flow in the movable annealing tube and the fixed annealing tube, the shutter comprises a valve plate which is rotationally connected with the lower end of the outer shell and adjusts the size of the through hole through rotation, and the rotating shaft of the valve plate is perpendicular to the bottom cover.
The invention also provides an optical fiber, which is produced by the optical fiber drawing annealing device.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: according to the invention, the position of the movable annealing tube is adjusted by the driving part, whether the movable annealing tube is additionally arranged is determined according to the requirements of various optical fibers, the length of a temperature field can be prolonged by additionally arranging the movable annealing tube below the fixed annealing tube, and the density of inert gas output by the first blowing part is smaller than that of inert gas output by the second blowing part, so that the temperature of the inert gas output by the first blowing part can be gradually increased in the ascending process until the inert gas reaches the mouth of the wire drawing furnace, a temperature field with even and obvious cooling and longer length is formed, and the ascending gas can blow silicon carbide in the wire drawing furnace and the fixed annealing tube into an exhaust gas collecting plate of the mouth of the wire drawing furnace at the same time. The method reduces the internal stress of the optical fiber, reduces microcracks and finally reduces the attenuation of the optical fiber, and simultaneously can collect silicon carbide deposited in a drawing furnace and an annealing pipe orifice in an exhaust gas collecting plate at the mouth of the drawing furnace through lower blowing, so that the strength and the drawing efficiency of the optical fiber are effectively improved.
Drawings
FIG. 1 is a schematic structural view of an annealing device;
fig. 2 is a schematic structural view of a first air blowing part;
fig. 3 is a schematic view of the shutter structure.
Detailed Description
The invention will be further described with reference to examples of embodiments shown in the drawings.
As shown in fig. 1, the optical fiber drawing annealing device comprises a drawing furnace, a fixed annealing tube 5 connected below the drawing furnace, a movable annealing tube 6 which is connected below the fixed annealing tube 5 in a sealing manner and used for prolonging the annealing temperature field, a driving part for driving the movable annealing tube 6 to move, an air pressure gauge 7 arranged on the fixed annealing tube 5, and an oxygen analyzer 8 arranged on the movable annealing tube.
The movable annealing tube 6 comprises an outer tube 12, a graphite inner liner 11 fixedly installed in the outer tube 12, and a first blowing part 9 installed on the lower end part of the outer tube 12 and supplying inert gas into the movable annealing tube 6, as shown in fig. 2, the first blowing part 9 comprises a housing 13 and a flow guiding block 14 installed in the housing 13, and the flow guiding block 14 is provided with an upper flow guiding channel 15 and a lower flow guiding channel 16 for respectively conveying the inert gas to the upper end and the lower end of the movable annealing tube 6.
The wire drawing stove below is equipped with the second portion of blowing (wire drawing stove and second portion of blowing are prior art, and detailed description is omitted here), the density of the inert gas that the second portion of blowing blown into is greater than the inert gas density that the first portion of blowing 9 blown into. The flow rate of the inert gas in the upper diversion channel 15 is larger than the flow rate of the inert gas in the lower diversion channel 16. The included angle between the upper diversion channel 15 and the axis of the graphite inner lining 11 is 20-40 degrees. The included angle between the lower diversion channel 16 and the axis of the graphite inner liner 11 is 40-60 degrees. In this embodiment, the upper flow guiding channels 15 and the lower flow guiding channels 16 are respectively formed by a plurality of pieces, uniformly and respectively around the axis of the graphite inner liner 11, an outer flow channel is formed between the casing 13 and the flow guiding block 14, and is communicated with the upper flow guiding channels 15 and the lower flow guiding channels 16, and air inlets are arranged on the side walls of the casing 13.
The bottom of shell 13 has seted up the through-hole of optic fibre, the lower extreme of first portion of blowing 9 is equipped with the shutter that is used for controlling the removal annealing pipe 6 and fixes the interior air current size of annealing pipe 5, as shown in fig. 3, the shutter include with shell 13 lower extreme is connected and thereby through rotating the valve block 10 of adjusting through-hole size, the pivot of valve block 10 is perpendicular to the bottom. In this embodiment, the valve plates 10 are two and symmetrically arranged, the valve plates 10 are respectively provided with a semicircular notch, and after the two valve plates 10 are closed, the two semicircular notches are closed to form a circle center through hole.
The driving part comprises a screw rod driving mechanism, the screw rod driving mechanism comprises a screw rod 1 and a nut 2 which is connected with the screw rod 1 in a threaded manner, and the driving mechanism further comprises a connecting piece which is connected between the nut 2 of the screw rod mechanism and the outer tube 12. The connecting piece comprises a first connecting rod 3 and a second connecting rod 4 which are rotatably connected and can be locked, the first connecting rod 3 and the second connecting rod 4 are respectively rotatably connected with the outer tube 12 and the nut 2, and the first connecting rod 3 and the outer tube 12, the second connecting rod 4 and the nut 2 are respectively fixed in relative positions through lock pins.
The working principle of the invention is as follows: the movable annealing tube is conveyed to the position near the lower part of the fixed annealing tube by the driving part, fine adjustment is carried out by the connecting piece, the movable annealing tube is moved to the position right below the fixed annealing tube, then the connecting piece is locked, the screw rod is rotated, the movable annealing tube is driven to ascend and be spliced with the fixed annealing tube in a sealing way, then the wire drawing furnace can start to work, meanwhile, the second blowing part and the first blowing part work, a temperature field with even and obvious cooling and longer length is formed, and ascending gas can blow silicon carbide in the wire drawing furnace and the fixed annealing tube into a waste gas collecting plate of a furnace mouth of the wire drawing furnace. The reduction of internal stress of the optical fiber, microcrack reduction and optical fiber attenuation are achieved, the attenuation of the optical fiber produced by the drawing furnace is low, meanwhile, silicon carbide deposited in the drawing furnace and an annealing pipe orifice can be collected in an exhaust gas collecting plate at the mouth of the drawing furnace through lower blowing, and the strength and drawing efficiency of the optical fiber are effectively improved.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (8)
1. The utility model provides an optical fiber drawing annealing device, it includes the wire drawing stove, connects in the fixed annealing pipe of wire drawing stove below, its characterized in that: the annealing furnace is characterized by further comprising a movable annealing pipe which is connected below the fixed annealing pipe in a sealing manner and used for prolonging an annealing temperature field, and a driving part which is used for driving the movable annealing pipe to move, wherein the movable annealing pipe comprises an outer pipe, a graphite inner liner which is fixedly installed in the outer pipe, and a first blowing part which is installed on the lower end part of the outer pipe and used for supplying inert gas into the movable annealing pipe, the first blowing part comprises a shell and a flow guide block which is installed in the shell, an upper flow guide channel and a lower flow guide channel which are used for conveying the inert gas to the upper end and the lower end of the movable annealing pipe are arranged on the flow guide block, a second blowing part is arranged below the drawing furnace, and the density of the inert gas blown by the second blowing part is greater than that of the inert gas blown by the first blowing part.
2. The optical fiber drawing annealing apparatus according to claim 1, wherein: the driving part comprises a screw rod driving mechanism, wherein the screw rod driving mechanism comprises a screw rod and a nut which is connected to the screw rod in a threaded manner, and the screw rod driving mechanism further comprises a connecting piece which is connected between the nut and the outer tube.
3. The optical fiber drawing annealing apparatus according to claim 2, wherein: the connecting piece comprises a first connecting rod and a second connecting rod which are connected in a rotating way and can be locked, the first connecting rod and the second connecting rod are respectively connected with the outer tube and the nut in a rotating way, and the first connecting rod, the outer tube, the second connecting rod and the nut are respectively fixed in relative positions through locking pins.
4. The optical fiber drawing annealing apparatus according to claim 1, wherein: the flow rate of the inert gas in the upper diversion channel is larger than that of the inert gas in the lower diversion channel.
5. The optical fiber drawing annealing apparatus according to claim 1, wherein: the included angle between the upper diversion channel and the axis of the graphite inner bushing is 20-40 degrees.
6. The optical fiber drawing annealing apparatus according to claim 1, wherein: the included angle between the lower diversion channel and the axis of the graphite inner bushing is 40-60 degrees.
7. The optical fiber drawing annealing apparatus according to claim 1, wherein: the bottom of shell has seted up the through-hole of optic fibre, the lower extreme of first portion of blowing is equipped with the shutter that is used for controlling removal annealing pipe and fixed annealing intraductal air current size, the shutter include with the shell lower extreme rotate the valve block of being connected and thereby through rotating the regulation through-hole size mutually, the pivot perpendicular to of valve block the bottom.
8. An optical fiber, characterized in that: which is produced by the optical fiber drawing and annealing apparatus according to any one of claims 1 to 7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810145788.3A CN108383375B (en) | 2018-02-12 | 2018-02-12 | Optical fiber drawing annealing device and optical fiber |
| PCT/CN2018/081564 WO2019153473A1 (en) | 2018-02-12 | 2018-04-02 | Optical fiber drawing and annealing device and optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810145788.3A CN108383375B (en) | 2018-02-12 | 2018-02-12 | Optical fiber drawing annealing device and optical fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108383375A CN108383375A (en) | 2018-08-10 |
| CN108383375B true CN108383375B (en) | 2023-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810145788.3A Active CN108383375B (en) | 2018-02-12 | 2018-02-12 | Optical fiber drawing annealing device and optical fiber |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108383375B (en) |
| WO (1) | WO2019153473A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109592894A (en) * | 2018-12-25 | 2019-04-09 | 通鼎互联信息股份有限公司 | A kind of drawing optical fibers sealing device and encapsulating method |
| CN110655321A (en) * | 2019-10-17 | 2020-01-07 | 远东通讯有限公司 | Low-loss optical fiber drawing system and drawing method thereof |
| CN110683752B (en) * | 2019-11-19 | 2024-02-09 | 赣州讯飞腾传导技术有限公司 | Optical fiber drawing cooling system and cooling method thereof |
| CN111348826A (en) * | 2020-04-29 | 2020-06-30 | 上海煜志科技有限公司 | Optical fiber drawing furnace |
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| CN201890848U (en) * | 2010-11-12 | 2011-07-06 | 江苏通鼎光电股份有限公司 | Optical fiber annealing extension tube for high-speed fiber drawing |
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2018
- 2018-02-12 CN CN201810145788.3A patent/CN108383375B/en active Active
- 2018-04-02 WO PCT/CN2018/081564 patent/WO2019153473A1/en active Application Filing
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| JPH04198036A (en) * | 1990-11-29 | 1992-07-17 | Fujikura Ltd | Heating furnace for wire drawing of optical fiber |
| JPH10194770A (en) * | 1996-12-27 | 1998-07-28 | Kobe Steel Ltd | Wire drawing furnace for optical fiber |
| CN1733635A (en) * | 2002-04-30 | 2006-02-15 | 康宁股份有限公司 | Methods for forming optical fiber |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108383375A (en) | 2018-08-10 |
| WO2019153473A1 (en) | 2019-08-15 |
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