CN115536262B - Optical fiber drawing equipment - Google Patents
Optical fiber drawing equipment Download PDFInfo
- Publication number
- CN115536262B CN115536262B CN202211248772.8A CN202211248772A CN115536262B CN 115536262 B CN115536262 B CN 115536262B CN 202211248772 A CN202211248772 A CN 202211248772A CN 115536262 B CN115536262 B CN 115536262B
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- spray holes
- vortex
- air
- flow dividing
- Prior art date
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 71
- 238000012681 fiber drawing Methods 0.000 title claims abstract description 17
- 239000011248 coating agent Substances 0.000 claims abstract description 21
- 238000000576 coating method Methods 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 239000007921 spray Substances 0.000 claims description 27
- 238000009826 distribution Methods 0.000 claims description 22
- 238000010926 purge Methods 0.000 claims description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 230000004323 axial length Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims 2
- 238000000034 method Methods 0.000 abstract description 8
- 238000007664 blowing Methods 0.000 abstract description 7
- 238000005491 wire drawing Methods 0.000 abstract description 5
- 239000010410 layer Substances 0.000 description 16
- 239000011247 coating layer Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 238000004804 winding Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000003286 fusion draw glass process Methods 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—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
-
- 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
- C03B37/032—Drawing means, e.g. drawing drums ; Traction or tensioning devices for glass optical fibres
-
- 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
- C03B37/035—Drawing means, e.g. drawing drums ; Traction or tensioning devices having means for deflecting or stripping-off fibres or for removing defective parts
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/104—Coating to obtain optical fibres
- C03C25/105—Organic claddings
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/104—Coating to obtain optical fibres
- C03C25/106—Single coatings
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/12—General methods of coating; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/24—Coatings containing organic materials
- C03C25/26—Macromolecular compounds or prepolymers
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
The invention relates to optical fiber drawing equipment, which comprises an optical fiber drawing furnace, a cooling device, a coating die and an ultraviolet curing device which are arranged from top to bottom, wherein a traction wheel and a guide wheel set are arranged below the ultraviolet curing device, and the guide wheel set is connected with an optical fiber collecting device. The invention can sweep the attached volatile matters generated in the process of high-speed wiredrawing and solidifying the coating, and remove the volatile matters attached to the surface of the optical fiber in the wiredrawing process. Volatile matters are prevented from adhering to the PMD wheel, the optical fiber calliper and the guide wheel along with the traction of the optical fiber, and the rubbing and drawing stability of the PMD wheel is improved, so that the surface quality of the optical fiber and the drawing quality of the optical fiber are improved. The vortex airflow generated by the vortex airflow blowing device can effectively remove the volatile matters adhered to the surface of the optical fiber. The invention has simple structure and reasonable arrangement.
Description
Technical Field
The invention relates to optical fiber drawing equipment, and belongs to the technical field of optical fiber processing equipment.
Background
The optical fiber is formed by drawing an optical fiber preform into a fiber in a high-temperature molten state, when the optical fiber is manufactured, the optical fiber preform is clamped in a wire drawing furnace and heated to more than 1700 ℃, a bare optical fiber with the diameter of 125 mu m is manufactured through high-temperature molten drawing, the bare optical fiber passes through a coating die to be coated with liquid resin coating, the liquid resin coating passes through a curing device, and the curing device irradiates the liquid coating with UV (ultraviolet) light to perform physical and chemical reactions to synthesize a solid resin coating layer. The bare optical fiber becomes the optical fiber after being coated and solidified by the coating, the optical fiber passes through the solidifying device, is wound on the guide wheel and the optical fiber drawing traction wheel, and finally, the optical fiber is guided to the wire collecting device through the guide wheel group to be collected, and the wire drawing preparation process is completed.
In the process of coating a coating layer and coating curing of a bare optical fiber, ultraviolet light irradiates the liquid coating to generate physical and chemical reactions when passing through a curing device after the liquid coating is coated on the bare optical fiber, so that the coating layer is cured, and meanwhile, some volatile matters are generated to be attached to the surface of the optical fiber coating layer and adhere to a PMD wheel, an optical fiber calliper and a guide wheel along with the traction of the optical fiber, so that the rubbing and drawing stability of the PMD wheel are affected, and the drawing quality, the disqualification of the optical fiber appearance and the like are affected after the volatile matters are accumulated.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the optical fiber drawing equipment aiming at the defects in the prior art, which can effectively remove the volatile matters attached to the surface of the optical fiber coating in the coating solidification, thereby improving the optical fiber drawing quality and the optical fiber appearance quality.
The technical scheme adopted by the invention for solving the technical problems is as follows: the device comprises an optical fiber drawing furnace, a cooling device, a coating die and an ultraviolet curing device which are arranged from top to bottom, wherein a traction wheel and a guide wheel set are arranged below the ultraviolet curing device, the guide wheel set is connected with an optical fiber winding device, and the device is characterized in that an air flow purging device is arranged between the ultraviolet curing device and the traction wheel.
According to the scheme, the PMD thread rolling wheel device is arranged between the air flow purging device and the traction wheel.
According to the scheme, the airflow purging device is a vortex airflow purging device.
According to the scheme, the vortex airflow purging device is a double-layer or multi-layer vortex airflow purging device.
According to the scheme, the double-layer vortex airflow purging device comprises an air inlet outer ring and a flow distribution inner ring, an annular buffer air cavity is arranged between the air inlet outer ring and the flow distribution inner ring, oblique flow distribution spray holes are formed in the flow distribution inner ring at intervals along the circumferential direction, the rear ends of the oblique flow distribution spray holes are communicated with the annular buffer air cavity, front end spray holes face to central through holes of the flow distribution inner ring, two layers of oblique flow distribution spray holes are formed in the axial direction at intervals up and down at intervals, deflection directions of the two layers of oblique flow distribution spray holes are opposite to form positive and negative two layers of vortex airflows, an air inlet outer ring is provided with an air inlet, one end of the air inlet is communicated with the annular buffer air cavity, and the other end of the air inlet is communicated with a pressure air source.
According to the scheme, the multi-layer vortex air flow purging device comprises more than two layers of inclined flow dividing spray holes, and the inclined flow dividing spray holes of two adjacent layers are opposite in deflection direction, so that positive and negative vortex air flows are formed.
According to the scheme, the included angle between the inclined flow dividing spray hole and the radius extension line is 25-45 degrees.
According to the scheme, 3-6 inclined flow distribution spray holes are uniformly distributed along the circumferential direction, and the aperture of each inclined flow distribution spray hole is 1.5-2.5 mm.
According to the scheme, the aperture of the central through hole of the shunt inner ring is 6-12 mm, and the axial length is 20-40 mm.
According to the scheme, the pressure air source is a nitrogen pressure air source.
According to the scheme, the bare optical fiber diameter measuring instrument is arranged between the optical fiber drawing furnace and the cooling device, and the optical fiber diameter measuring instrument is arranged between the air flow blowing device and the PMD thread rolling wheel device.
The beneficial effects of the invention are as follows: 1. the method can sweep the attached volatile matters generated in the process of drawing and solidifying the coating at high speed for removing the volatile matters attached to the surface of the optical fiber in the drawing process. Volatile matters are prevented from adhering to the PMD wheel, the optical fiber calliper and the guide wheel along with the traction of the optical fiber, and the rubbing and drawing stability of the PMD wheel is improved, so that the surface quality of the optical fiber and the drawing quality of the optical fiber are improved. 2. The vortex airflow generated by the vortex airflow blowing device can effectively remove the volatile matters adhered to the surface of the optical fiber. 3. The double-layer or multi-layer vortex airflow blowing device can generate two or more vortex airflows with opposite directions, so that the torsion action of the vortex airflows on the optical fiber is mutually counteracted and balanced, and the normal operation of wire drawing and thread rolling is ensured. 4. The invention has simple structure and reasonable arrangement.
Drawings
Fig. 1 is a general structural elevation view of one embodiment of the present invention.
FIG. 2 is a front cross-sectional view of a vortex air flow purge apparatus in one embodiment of the invention.
Fig. 3 is a top cross-sectional view of fig. 2 taken along the lower split nozzle.
Fig. 4 is a top cross-sectional view of fig. 2 taken along the upper-layer split nozzle.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples.
An embodiment of the invention is shown in fig. 1-4, and comprises a lifting chuck 24 for clamping an optical fiber preform 9, a drawing furnace 10, a bare optical fiber diameter measuring instrument 22, a cooling device 23, a coating die 12 and an ultraviolet curing device 13 which are arranged from top to bottom, wherein a traction wheel 15 and a guide wheel group 19 are arranged below the ultraviolet curing device, the guide wheel group is connected with an optical fiber winding device 18, the optical fiber winding device comprises a tensioning wheel B and a winding optical fiber disc A, an air flow blowing device 14 is arranged between the ultraviolet curing device and the traction wheel, and an optical fiber diameter measuring instrument 20 and a PMD wire rolling wheel device 21 are arranged between the air flow blowing device and the traction wheel. The air flow purging device is a double-layer vortex air flow purging device, the double-layer vortex air flow purging device comprises an air inlet outer ring 7 and a flow dividing inner ring 2, the air inlet outer ring is provided with a circular concave cavity, the bottom surface of the circular concave cavity is provided with a through hole, the top of the flow dividing inner ring is provided with an outwards extending edge, the edge is provided with a connecting hole 1 in the circumferential direction, the connecting hole is connected with a screw hole 3 on the top surface of the air inlet outer ring through a screw 17, the air inlet outer ring 7 and the flow dividing inner ring 2 are connected into a whole, an annular buffer air cavity 16 is formed between the circular concave cavity of the air inlet outer ring and the outer diameter of the flow dividing inner ring, the middle part of the flow dividing inner ring is provided with a through hole connected with the through hole on the bottom of the air inlet outer ring concave cavity, the flow dividing inner ring is provided with inclined flow dividing spray holes along the circumferential interval, the rear end of the inclined flow distribution spray hole is communicated with the annular buffer air cavity, the spray hole at the front end faces the central through hole of the flow distribution inner ring, two layers of inclined flow distribution spray holes are axially arranged at intervals up and down and have opposite deflection directions, so that positive and negative two layers of vortex air flows are formed, the included angle between each inclined flow distribution spray hole and a radius extension line is 35 degrees, 4 inclined flow distribution spray holes are circumferentially uniformly distributed, the upper inclined flow distribution spray holes 5 deflect leftwards to form clockwise positive vortex air flows, the lower inclined flow distribution spray holes 6 deflect rightwards to form anticlockwise negative vortex air flows, the aperture of each inclined flow distribution spray hole is 2mm, the aperture of the central through hole of the flow distribution inner ring is 6-12 mm, and the axial length of each inclined flow distribution inner ring is 20-40 mm; the air inlet outer ring is provided with an air inlet hole 4 and a joint 8, the left side and the right side of the air inlet hole are symmetrically arranged, one end of the air inlet hole is communicated with the annular buffer air cavity, the other end of the air inlet hole is communicated with a pressure air source, the pressure air source is a nitrogen pressure air source, and the pressure air source is nitrogen with the pressure of 5-6bar and 10-20 SLM.
The optical fiber preform is manufactured into a bare optical fiber through high-temperature fusion drawing in a drawing furnace, the bare optical fiber enters a coating die through a bare optical fiber diameter measuring instrument and a cooling device to be coated with a resin coating, then enters an ultraviolet curing device to cure the resin coating, the optical fiber is manufactured into an optical fiber 11 with a coating layer, the optical fiber enters an air flow blowing device to blow attached volatile matters generated in the process of high-speed drawing and curing the coating, the volatile matters attached to the surface of the optical fiber in the drawing process are removed, and the optical fiber is finally connected with an optical fiber collecting device 18 through a traction wheel 15 and a guide wheel set 19 through an optical fiber diameter measuring instrument 20 and a PMD thread rolling wheel device 21.
Claims (6)
1. The optical fiber drawing equipment comprises an optical fiber drawing furnace, a cooling device, a coating die and an ultraviolet curing device which are arranged from top to bottom, wherein a traction wheel and a guide wheel set are arranged below the ultraviolet curing device, and the guide wheel set is connected with an optical fiber collecting device; the air flow purging device is a vortex air flow purging device, and the vortex air flow purging device is a double-layer or multi-layer vortex air flow purging device; the double-layer vortex airflow purging device comprises an air inlet outer ring and a flow dividing inner ring, an annular buffer air cavity is arranged between the air inlet outer ring and the flow dividing inner ring, oblique flow dividing spray holes are arranged at intervals along the circumferential direction of the flow dividing inner ring, the rear ends of the oblique flow dividing spray holes are communicated with the annular buffer air cavity, front end spray holes face to central through holes of the flow dividing inner ring, two layers of oblique flow dividing spray holes are axially arranged at intervals up and down and have opposite deflection directions, so that positive and negative two layers of vortex airflows are formed, the air inlet outer ring is provided with an air inlet, one end of the air inlet is communicated with the annular buffer air cavity, and the other end of the air inlet is communicated with a pressure air source; the multi-layer vortex airflow purging device comprises more than two layers of inclined flow dividing spray holes, and the inclined flow dividing spray holes of two adjacent layers are opposite in deflection direction, so that positive and negative vortex airflows are formed.
2. An optical fiber drawing apparatus according to claim 1, wherein a PMD thread rolling wheel device is provided between the air flow purge device and the traction wheel.
3. An optical fiber drawing apparatus according to claim 1 or 2, wherein the inclined diverting orifice is at an angle of 25 ° to 45 ° to the radial extension.
4. The optical fiber drawing device according to claim 1 or 2, wherein 3 to 6 inclined flow distribution spray holes are uniformly distributed along the circumferential direction, and the aperture of the inclined flow distribution spray holes is 1.5 to 2.5mm.
5. The optical fiber drawing apparatus according to claim 1, wherein the diameter of the center through hole of the split inner ring is 6 to 12mm and the axial length is 20 to 40mm.
6. The optical fiber drawing apparatus of claim 1 wherein said pressurized gas source is a nitrogen pressurized gas source.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211248772.8A CN115536262B (en) | 2022-10-12 | 2022-10-12 | Optical fiber drawing equipment |
| PL446339A PL446339A1 (en) | 2022-10-12 | 2023-10-10 | Device for drawing optical fibers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211248772.8A CN115536262B (en) | 2022-10-12 | 2022-10-12 | Optical fiber drawing equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115536262A CN115536262A (en) | 2022-12-30 |
| CN115536262B true CN115536262B (en) | 2023-12-01 |
Family
ID=84733780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211248772.8A Active CN115536262B (en) | 2022-10-12 | 2022-10-12 | Optical fiber drawing equipment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115536262B (en) |
| PL (1) | PL446339A1 (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07267686A (en) * | 1994-03-31 | 1995-10-17 | Fujikura Ltd | Method for coating optical fiber and device therefor |
| CN101549962A (en) * | 2009-05-15 | 2009-10-07 | 长飞光纤光缆有限公司 | Method and device for removing coating solidifying volatile material in optical fibre drawing process |
| CN101767930A (en) * | 2010-02-05 | 2010-07-07 | 中天科技光纤有限公司 | High-speed wire drawing device for optical fiber production process and high-speed wire drawing method thereof |
| CN207386069U (en) * | 2017-02-07 | 2018-05-22 | 通鼎互联信息股份有限公司 | A kind of device for cleaning optical fiber surface volatile matter |
| CN209263059U (en) * | 2018-11-15 | 2019-08-16 | 伊思特（北京）能源科技有限公司 | A kind of coking dust stratification purging device |
| CN211838899U (en) * | 2019-12-25 | 2020-11-03 | 山东智光通信科技有限公司 | Device for cleaning volatile matter by blowing heated air flow |
| CN214583072U (en) * | 2020-12-25 | 2021-11-02 | 天津富通光纤技术有限公司 | Cleaning device for reducing pollution of fiber diameter instrument lens in optical fiber production |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1274619C (en) * | 2004-09-27 | 2006-09-13 | 长飞光纤光缆有限公司 | Method of making optical fiber by high speed drawing |
| JP5672763B2 (en) * | 2010-05-07 | 2015-02-18 | 住友電気工業株式会社 | Optical fiber drawing method and apparatus |
| CN116813193A (en) * | 2023-07-13 | 2023-09-29 | 安徽长荣光纤光缆科技有限公司 | Optical fiber drawing cooling device |
-
2022
- 2022-10-12 CN CN202211248772.8A patent/CN115536262B/en active Active
-
2023
- 2023-10-10 PL PL446339A patent/PL446339A1/en unknown
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07267686A (en) * | 1994-03-31 | 1995-10-17 | Fujikura Ltd | Method for coating optical fiber and device therefor |
| CN101549962A (en) * | 2009-05-15 | 2009-10-07 | 长飞光纤光缆有限公司 | Method and device for removing coating solidifying volatile material in optical fibre drawing process |
| CN101767930A (en) * | 2010-02-05 | 2010-07-07 | 中天科技光纤有限公司 | High-speed wire drawing device for optical fiber production process and high-speed wire drawing method thereof |
| CN207386069U (en) * | 2017-02-07 | 2018-05-22 | 通鼎互联信息股份有限公司 | A kind of device for cleaning optical fiber surface volatile matter |
| CN209263059U (en) * | 2018-11-15 | 2019-08-16 | 伊思特（北京）能源科技有限公司 | A kind of coking dust stratification purging device |
| CN211838899U (en) * | 2019-12-25 | 2020-11-03 | 山东智光通信科技有限公司 | Device for cleaning volatile matter by blowing heated air flow |
| CN214583072U (en) * | 2020-12-25 | 2021-11-02 | 天津富通光纤技术有限公司 | Cleaning device for reducing pollution of fiber diameter instrument lens in optical fiber production |
Also Published As
| Publication number | Publication date |
|---|---|
| PL446339A1 (en) | 2024-04-15 |
| CN115536262A (en) | 2022-12-30 |
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