CN113788613A - Optical fiber preparation system and method - Google Patents
Optical fiber preparation system and method Download PDFInfo
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- CN113788613A CN113788613A CN202111351335.4A CN202111351335A CN113788613A CN 113788613 A CN113788613 A CN 113788613A CN 202111351335 A CN202111351335 A CN 202111351335A CN 113788613 A CN113788613 A CN 113788613A
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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
- C03B37/029—Furnaces therefor
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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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- 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
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- 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
- C03C25/66—Chemical treatment, e.g. leaching, acid or alkali treatment
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2205/00—Fibre drawing or extruding details
- C03B2205/60—Optical fibre draw furnaces
- C03B2205/62—Heating means for drawing
- C03B2205/64—Induction furnaces, i.e. HF/RF coil, e.g. of the graphite or zirconia susceptor type
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- 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
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- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
Abstract
The invention discloses an optical fiber preparation system and a method thereof, comprising a drawing unit, a control unit and a control unit, wherein the drawing unit is used for drawing a prefabricated glass rod to form a bare optical fiber and uniformly coating the bare optical fiber to obtain the optical fiber; the deuterium processing unit is used for reducing and eliminating the internal defects of the optical fiber and reducing the hydrogen loss of the single-mode optical fiber; a screening unit for selecting optical fibers based on the optical fiber speed difference and the optical fiber stress; and the test unit is used for detecting and confirming the performance of the optical fiber. According to the invention, the graphite is heated by adopting the induction current, so that the prefabricated glass rod is heated to be molten, and compared with the traditional laser heating, the controllability is higher; when the prefabricated glass rod is replaced, the second steel pipe is moved downwards to be separated from the first steel pipe, the first steel pipe is covered and sealed, hot gas is prevented from leaking to reduce the temperature in the heating cavity, and therefore heat preservation and raw material replacement are achieved; compared with the traditional method of firstly cooling, replacing the prefabricated glass rod and then heating, the invention greatly improves the production efficiency.
Description
Technical Field
The invention belongs to the technical field of optical fiber preparation, and particularly relates to an optical fiber preparation system and an optical fiber preparation method.
Background
The optical fiber is a short-hand writing of optical fiber, is a fiber made of glass or plastic, can be used as a light conduction tool, and the current optical fiber preparation methods mainly comprise a laser heating pedestal method, a melting sleeve method and the like. The laser heating pedestal method can prepare the optical fiber with higher fiber core purity, but the preparation process condition is harsh, and the optical fiber prepared by the laser heating pedestal method has short length.
The fused casing method is a method of integrating a quartz tube and an internal core layer material by using a high-temperature heat source, namely a traditional rod inserting method or a tube powder method. Firstly, a core layer material of an optical fiber is prepared into a core rod which is inserted into a quartz sleeve with one closed end, and then the core rod is drawn on a graphite drawing tower to prepare the optical fiber, namely the traditional rod inserting method. The tube powder method is a process of preparing the core layer material of the optical fiber into powder, filling the powder into a quartz sleeve with one closed end, and then drawing the powder on a drawing tower to prepare the optical fiber. In order to ensure that the core layer material is not oxidized in the wire drawing process, the quartz tube can be subjected to vacuum pumping treatment. After one end of the quartz tube is closed, the oxidation of residual oxygen to the core layer material under the action of high temperature still cannot be guaranteed by pure vacuum pumping. In addition, the high-temperature melting of the wire drawing tower simultaneously completes the integration of the quartz cladding and the core layer, and the quartz matrix material serving as the cladding and the core layer matrix material are easy to diffuse mutually under the action of high temperature, so that the original characteristics of the core layer material and the optical performance of the optical fiber are changed.
The existing optical fiber preparation system is low in optical fiber manufacturing efficiency and high in energy consumption, after one prefabricated glass rod is completely drawn, when the next prefabricated glass rod is replaced, the temperature needs to be reduced firstly, and after the prefabricated glass rod is loaded, the temperature is raised again, wherein 4 hours are needed in the process of reducing the temperature, and the production efficiency is greatly influenced.
Disclosure of Invention
The present invention is directed to provide an optical fiber preparation system and a method thereof, so as to solve the problem of low preparation efficiency of the existing optical fiber.
In order to achieve the purpose, the invention adopts the technical scheme that:
in one aspect, an optical fiber preparation system and method thereof includes:
a drawing unit for drawing the preform glass rod to form a bare optical fiber and uniformly coating the bare optical fiber to obtain an optical fiber;
the deuterium processing unit is used for reducing and eliminating the internal defects of the optical fiber and reducing the hydrogen loss of the single-mode optical fiber;
a screening unit for selecting optical fibers based on the optical fiber speed difference and the optical fiber stress;
a test unit for optical fiber performance detection and validation;
the wire drawing unit comprises a heating furnace; the middle part of the heating furnace is provided with a heating cavity with the bottom in a conical shape for heating the prefabricated glass rod; the heating cavity is made of stone mill, and a plurality of circles of induction coils are wound on the cavity wall of the heating cavity made of the stone mill; the top of the heating cavity is communicated with a first air inlet pipe for injecting argon; a heat insulation layer for heat insulation and temperature reduction is arranged on the wall of the heating furnace, and flowing water for heat exchange is injected into the heat insulation layer;
an outlet below the heating furnace is communicated with the material changing control cavity, a first steel pipe communicated with the tip end of the heating cavity is arranged in the middle of the material changing control cavity, the lower part of the first steel pipe is communicated with a second steel pipe, the first steel pipe and the second steel pipe are movably connected through a connecting piece, and a limiting ring is welded on the second steel pipe at the outlet end of the material changing control cavity;
the lower half cavity of the material changing control cavity is accommodated in the purification cavity, and a first diameter gauge is arranged on a second steel pipe in the purification cavity; a filter is arranged at the bottom of one side of the purification cavity and is communicated with an external air feeder; the top end of the opposite side of the purification cavity is communicated with an exhaust fan through a pipeline;
a cooling chamber is arranged below the purification cavity, and the upper cavity of the cooling chamber is accommodated in the purification cavity; the purification cavity comprises a conduction cavity arranged in the middle, and the second steel pipe penetrates through the conduction cavity; cooling cavities are symmetrically formed in two sides of the conduction cavity, and flowing water for exchanging heat with the conduction cavity is injected into each of the two cooling cavities; the top of the conduction cavity is communicated with a second gas inlet pipe for introducing helium;
a coating cavity is arranged on the second steel pipe below the cooling chamber; the coating cavity is communicated with the heating chamber through a pipeline; the heating chamber comprises a heating barrel for centralized feeding, a heater is arranged on the top wall of the heating chamber, an induced draft fan is arranged at the top of the heating chamber, and the induced draft fan is used for guiding external air into the heater for heating and heating the heating barrel;
a curing cavity is arranged below the coating cavity, and first ultraviolet light, second ultraviolet light, third ultraviolet light and fourth ultraviolet light are distributed in the curing cavity at intervals; the distance between the first ultraviolet light and the second ultraviolet light is 750mm, the distance between the second ultraviolet light and the third ultraviolet light is 500mm, and the distance between the third ultraviolet light and the fourth ultraviolet light is 300 mm;
a second diameter gauge is installed on a second steel pipe below the curing cavity, and the optical fiber at the outlet end of the second steel pipe is led out through a traction wheel and collected based on a take-up pulley;
the screening unit comprises a first driving wheel and a second driving wheel which are positioned on the same horizontal line; a pulley is arranged below the space between the first driving wheel and the second driving wheel; the optical fiber is sequentially wound on the first driving wheel, the pulley and the second driving wheel, and a force sensor for testing the tension of the optical fiber is arranged on the pulley; the rotating speed of the first driving wheel is less than that of the second driving wheel; the rotating shaft of the first driving wheel is rotationally connected with the servo generator, and the servo generator converts mechanical energy into electric energy and is connected with the power grid end.
Furthermore, the wall of the heating furnace cavity is made of steel; the bottom of one side of the heat insulation cavity is provided with a water injection port, and the top of the opposite side is provided with a water outlet.
The temperature in the heating cavity is up to 2000 ℃, and exceeds the melting point of steel, so a heat insulation cavity is arranged on the inner side of the wall of the heating furnace cavity, flowing water is injected into the cavity, partial heat is taken away by the flowing water, the temperature of the steel is reduced, and the protection of the steel is further realized.
Furthermore, one side of the material changing control cavity is provided with a control door.
When the prefabricated glass rod is replaced, the first steel pipe and the second steel pipe are convenient to control, the material replacing cavity is used for sealing the first steel pipe and part of the second steel pipe, and dust and impurities are prevented from being attached to the pipe walls of the first steel pipe and the second steel pipe.
Further, the length of the second steel pipe is 2-2.5m, and the diameter of the second steel pipe is 50 mm.
The length of the steel pipe is more than 2m, so that the air flow in the steel pipe can be stabilized, and the fluctuation of the diameter of the optical fiber can be reduced.
Further, the heating barrel introduces the coating material into the coating chamber by a water pump.
A plurality of raw materials are introduced into the heating barrel, and only 10kg of raw materials are introduced into one barrel in the prior art.
Further, the blowing pressure of the blower is 200Kpa, and the draft pressure of the induced draft fan is 150 Kpa.
Through the cooperation of air supply and induced air, will purify dust and impurity on the second steel pipe wall in the chamber and get rid of, avoid influencing steel pipe intensity, and then increase the life of steel pipe.
In one aspect, a method of making an optical fiber preparation system, comprising:
s1, starting a traction wheel, setting the traction speed of the traction wheel, loading the prefabricated glass into the heating cavity, heating the prefabricated glass through graphite in the induction coil, and simultaneously injecting argon into the heating cavity;
injecting flowing water into the heat insulation cavity, and performing heat exchange with air between the heating cavity and the heating furnace to reduce the temperature of the furnace wall of the heating furnace;
s2, testing the diameter of the drawn bare fiber by a first diameter gauge in the purifying cavity, and if the tested diameter is not within a preset value range, adjusting the rotating speed of the traction wheel until the tested diameter value is within the preset range;
the air feeder blows external air to the pipe wall of the second steel pipe through the filter, the air feeder is used for cooling the lower part of the material changing control cavity, the second steel pipe and the upper part of the cooling chamber, removing dust and impurities attached to the lower part of the material changing control cavity, the second steel pipe and the upper part of the cooling chamber, and discharging air with residual heat and impurities under the action of the induced draft fan;
s3, injecting flowing water into the cooling cavity, enabling the water in the cooling cavity to exchange heat with air in the conduction cavity, and meanwhile, introducing helium into the conduction cavity to exchange heat with hot air so as to cool the optical fiber;
s4, cooling the bare optical fiber, and then coating the bare optical fiber in a coating cavity;
s5, carrying out ultraviolet curing coating on the coated optical fiber by sequentially passing through a first ultraviolet light, a second ultraviolet light, a third ultraviolet light and a fourth ultraviolet light at unequal intervals, and blowing air for cooling while curing the first ultraviolet light;
s6, testing the diameter of the optical fiber after ultraviolet curing by a second diameter gauge, and if the tested diameter is not within a preset range value, adjusting the rotating speed and coating parameters of the traction wheel until the tested diameter value is within the preset range;
s7, winding the optical fiber meeting the diameter requirement on a take-up pulley;
s8, deuterium processing is carried out on the optical fiber by adopting a deuterium processing unit, so that the internal defects of the optical fiber are reduced and eliminated, and the hydrogen loss of the single-mode optical fiber is reduced;
s9, winding the optical fiber processed by deuterium on a first driving wheel, a pulley and a second driving wheel, and starting the first driving wheel and the second driving wheel, wherein the rotating speed of the first driving wheel is greater than that of the second driving wheel; the force sensor collects tension of the optical fiber in real time, if the optical fiber is not broken, the optical fiber meets the quality requirement, and if the optical fiber is broken, the broken optical fiber is removed;
the second rotating wheel drives the first driving wheel to rotate, and drives the servo generator to generate power according to the rotation speed difference of the first driving wheel, and the generated electric energy is transmitted to a power grid.
Further, the replacement of the preform glass rod comprises:
t1, opening the control door, rotating to open the connecting piece, enabling the second steel pipe to move downwards and stop moving under the action of the limiting ring;
t2, adopting a protective cover to seal an outlet below the first steel pipe, and isolating the first steel pipe from the heating cavity to keep the temperature in the heating cavity and avoid the leakage of gas in the heating cavity;
t3, replacing the prefabricated glass rod, loading the prefabricated glass rod in the heating cavity, and synchronously drawing and drawing by the drawing wheel.
The optical fiber preparation system and the method thereof provided by the invention have the following beneficial effects:
according to the invention, the graphite is heated by adopting the induction current, and the prefabricated glass rod is further heated to be molten, so that the controllability is higher compared with the traditional laser heating.
Set up thermal-insulated chamber in the inboard of heating furnace chamber wall, pour into flowing water into in the cavity, flowing water takes away partial heat, reduces the steel temperature, and then realizes the protection to steel.
When the prefabricated glass rod is replaced, the second steel pipe is moved downwards to be separated from the first steel pipe, the first steel pipe is covered and sealed, hot gas is prevented from leaking to reduce the temperature in the heating cavity, and therefore heat preservation and raw material replacement are achieved; compared with the traditional method of firstly cooling, replacing the prefabricated glass rod and then heating, the invention greatly improves the production efficiency.
The bottom of the material changing control cavity is embedded in the purification cavity, the top of the cooling chamber is embedded in the purification cavity, the sealing performance between the material changing control cavity and the purification cavity and between the purification cavity and the cooling chamber can be increased, the lower part of the material changing control cavity, the upper parts of the second steel pipe and the cooling chamber can be cooled simultaneously, the attached dust and impurities on the lower part of the material changing control cavity, the second steel pipe and the upper part of the cooling chamber can be removed simultaneously, and air with waste heat and impurities is discharged under the action of an induced draft fan. The leakproofness of reloading control chamber has been increased promptly, also increases to cool off the second steel pipe in advance, has improved the cooling efficiency of cooling chamber.
And helium is introduced into the cooling chamber, the helium has small molecular weight, good heat conducting property and good heat exchange effect, and is further used for reducing the temperature of the second steel pipe and the optical fiber therein. Meanwhile, the cooling effect of the cooling chamber is greatly enhanced by matching flowing water in the cooling chamber with air supply and induced air in the purification chamber.
The coating chamber adopts the concentrated feed, concentrates on heating in the heating bucket with a plurality of raw materials is whole, then concentrates the feed through the water pump, so, can practice thrift the time of batching at every turn for production efficiency.
And ultraviolet curing, wherein the coated optical fiber is subjected to ultraviolet curing coating by sequentially passing through a first ultraviolet light, a second ultraviolet light, a third ultraviolet light and a fourth ultraviolet light with unequal intervals.
Optical fiber screening, namely screening the optical fiber based on the rotating speed difference between the first driving wheel and the second driving wheel, wherein if the optical fiber is broken, the optical fiber does not meet the quality requirement, and if the optical fiber is not broken, the optical fiber meets the requirement; meanwhile, based on the speed difference, servo power generation is carried out, and the generated electric energy is transmitted to a power grid end, so that energy is saved.
Drawings
FIG. 1 is a block diagram of an optical fiber preparation system.
Fig. 2 is a diagram of a fiber screening architecture of the fiber preparation system.
Wherein, 1, prefabricating a glass rod; 2. heating furnace; 3. a thermally insulating cavity; 4. a water injection port; 5. a water outlet; 6. a first intake pipe; 7. a heating cavity; 8. graphite; 9. an induction coil; 10. a first steel pipe; 11. a control gate; 12. a connecting member; 13. a second steel pipe; 14. a material changing control cavity; 15. a limiting ring; 16. a purification chamber; 17. a first caliper; 18. a blower; 19. a filter; 20. a second intake pipe; 21. a cooling chamber; 22. a cooling chamber; 23. a conductive cavity; 24. a coating chamber; 25. a heating chamber; 26. an induced draft fan; 27. a heater; 28. a transfer pump; 29. a heating barrel; 30. a curing chamber; 31. a first ultraviolet light; 32. a second ultraviolet light; 33. a third ultraviolet light; 34. a fourth ultraviolet light; 35. a second caliper; 36. a traction wheel; 37. a take-up pulley; 38. an exhaust fan; 39. a pulley; 40. a second drive wheel; 41. a servo generator; 42. an inverter; 43. a grid terminal; 44. a first drive wheel; 45. a force sensor.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
According to the first embodiment of the present application, referring to fig. 1-2, the optical fiber preparation system of the present embodiment includes a drawing unit, a deuterium processing unit, a screening unit, and a testing unit.
And the drawing unit is used for drawing the prefabricated glass rod 1 to form a bare optical fiber and uniformly coating the bare optical fiber to obtain the optical fiber.
Deuterium processing unit for reduce, eliminate optic fibre internal defect, and reduce single mode fiber hydrogen loss, this unit is prior art, so no longer give unnecessary details in this application document.
And the screening unit is used for selecting the optical fiber based on the optical fiber speed difference and the optical fiber stress.
The test unit is used for detecting and confirming the performance of the optical fiber, and the unit is in the prior art, so the description is omitted in the application document.
Specifically;
the wire drawing unit comprises a heating furnace 2, a heating cavity 7 with the conical bottom for heating the prefabricated glass rod 1 is arranged in the middle of the heating furnace 2, and the temperature of the heating cavity 7 can reach 2000 ℃.
The heating chamber 7 is made of graphite 8, a plurality of circles of induction coils 9 are wound on the wall of the heating chamber 7 made of stone mill, and the prefabricated glass rod 1 is heated by matching of the induction coils 9 and the graphite 8.
The top of the heating chamber 7 is communicated with a first gas inlet pipe 6 for injecting argon gas which can protect the graphite 8 from being burnt and can also isolate air.
A heat insulation layer for heat insulation and temperature reduction is arranged on the cavity wall of the heating furnace 2, flowing water for heat exchange is injected into the heat insulation layer, and the cavity wall of the heating furnace 2 is made of steel; the heat insulating layer is a heat insulating cavity 3, the bottom of one side of the heat insulating cavity 3 is provided with a water filling port 4, and the top of the opposite side is provided with a water outlet 5.
The temperature in the heating cavity 7 is up to 2000 ℃, which exceeds the melting point of steel, so that the heat insulation cavity 3 is arranged on the inner side of the cavity wall of the heating furnace 2, flowing water is injected into the cavity, partial heat is taken away by the flowing water, the temperature of the steel is reduced, and the protection of the steel is further realized.
The heating chamber 7 heats the preform glass rod 1 to a molten state by the heating action of the graphite 8, and the preform glass rod is drawn downward by the drawing action of the drawing wheel 36.
An outlet at the lower part of the heating furnace 2 is communicated with a material changing control cavity 14, a first steel pipe 10 communicated with the tip end of the heating cavity 7 is arranged in the middle of the material changing control cavity 14, the lower part of the first steel pipe 10 is communicated with a second steel pipe 13, the first steel pipe 10 is movably connected with the second steel pipe 13 through a connecting piece 12, and a limiting ring 15 is welded on the second steel pipe 13 at the outlet end of the material changing control cavity 14.
The control door 11 is arranged on one side of the material changing control cavity 14, so that the first steel pipe 10 and the second steel pipe 13 can be conveniently controlled when the prefabricated glass rod 1 is changed, the material changing cavity is used for sealing the first steel pipe 10 and part of the second steel pipe 13, and dust and impurities are prevented from being attached to the pipe walls of the first steel pipe 10 and the second steel pipe 13.
The material changing control cavity 14 is used for assisting material changing, when the prefabricated glass rod 1 is changed, the rotary connecting piece 12 is controlled, the second steel pipe 13 is moved downwards to be separated from the first steel pipe 10, the second steel pipe 13 only moves downwards for a certain distance under the matching of the limiting ring 15, the first steel pipe 10 is covered and sealed, hot gas is prevented from leaking, the temperature in the heating cavity 7 is reduced, and heat preservation and raw material changing are achieved; compared with the traditional method of firstly cooling, replacing the prefabricated glass rod 1 and then heating, the invention greatly improves the production efficiency.
The length of the second steel pipe 13 is 2-2.5m, the diameter of the second steel pipe 13 is 50mm, and the length of the second steel pipe 13 is more than 2m, so that the air flow in the steel pipe can be stabilized, and the fluctuation of the diameter of the optical fiber can be reduced.
The lower half cavity of the material changing control cavity 14 is accommodated in the purification cavity 16, the first diameter gauge 17 is installed on the second steel pipe 13 positioned in the purification cavity 16, the first diameter gauge 17 tests the diameter of the drawn bare optical fiber, and if the tested diameter is not within the preset value range, the rotating speed of the traction wheel 36 is adjusted until the tested diameter value is within the preset range.
A filter 19 is arranged at the bottom of one side of the purification cavity 16, and the filter 19 is communicated with an external blower 18; the top end of the opposite side of the purifying cavity 16 is communicated with an exhaust fan 38 through a pipeline, an air blower 18 blows external air to the pipe wall of the second steel pipe 13 through a filter 19, the external air is used for cooling the lower part of the material changing control cavity 14, the upper part of the second steel pipe 13 and the cooling chamber 21, meanwhile, dust and impurities attached to the lower part of the material changing control cavity 14, the upper part of the second steel pipe 13 and the upper part of the cooling chamber 21 are removed, and air with residual heat and impurities is exhausted under the action of an induced draft fan 26.
A cooling chamber 21 is arranged below the purification cavity 16, and the upper cavity of the cooling chamber 21 is accommodated in the purification cavity 16; the purification cavity 16 comprises a conduction cavity 23 arranged in the middle, and the second steel pipe 13 penetrates through the conduction cavity 23; cooling cavities 22 are symmetrically formed in two sides of the conduction cavity 23, and flowing water for exchanging heat with the conduction cavity 23 is injected into each of the two cooling cavities 22; the top of the conduction chamber 23 communicates with a second inlet pipe 20 for introducing helium gas.
The bottom of the material changing control cavity 14 is embedded in the purification cavity 16, the top of the cooling chamber 21 is embedded in the purification cavity 16, the sealing performance among the material changing control cavity 14, the purification cavity 16 and the cooling chamber 21 can be improved, the lower part of the material changing control cavity 14, the upper parts of the second steel pipe 13 and the cooling chamber 21 can be cooled at the same time, dust and impurities attached to the lower part of the material changing control cavity 14, the upper parts of the second steel pipe 13 and the cooling chamber 21 are removed at the same time, and air with residual heat and impurities is discharged under the action of the induced draft fan 26. In other words, the tightness of the refueling control cavity 14 is increased, the second steel pipe 13 is cooled in advance, and the cooling efficiency of the cooling chamber 21 is improved.
Helium is introduced into the cooling chamber 21, the helium has a small molecular weight, good heat conductivity and good heat exchange effect, and is further used for reducing the temperature of the second steel pipe 13 and the optical fibers therein. Meanwhile, the cooling effect of the cooling chamber 21 is greatly enhanced by matching with the flowing water in the cooling cavity 22 and the air supply and the induced air in the purification cavity 16.
A coating cavity 24 is arranged on the second steel pipe 13 below the cooling chamber 21; the coating chamber 24 communicates with the heating chamber 25 through a pipe; the heating chamber 25 includes a heating barrel 29 for concentrated feeding, a heater 27 is installed on the top wall of the heating chamber 25, an induced draft fan 26 is installed on the top of the heating chamber 25, the induced draft fan 26 is used for guiding external air into the heater 27 for heating and heating the heating barrel 29, and the raw materials heated by the heating barrel 29 through a transfer pump 28 are guided into the coating cavity.
The heating barrel 29 introduces the coating material into the coating cavity 24 through a water pump, and a plurality of raw materials are introduced into the heating barrel 29, wherein only 10kg of raw materials are introduced into one barrel in the prior art.
A curing chamber 30 is arranged below the coating chamber 24, and first ultraviolet light 31, second ultraviolet light 32, third ultraviolet light 33 and fourth ultraviolet light 34 are distributed at intervals in the curing chamber 30; the separation between the first ultraviolet light 31 and the second ultraviolet light 32 is 750mm, the separation between the second ultraviolet light 32 and the third ultraviolet light 33 is 500mm, and the separation between the third ultraviolet light 33 and the fourth ultraviolet light 34 is 300 mm.
And when the first ultraviolet light 31 is cured, air supply and exhaust are carried out, cooling is accelerated, four ultraviolet lights with different intervals are adopted to cooperate with air cooling, and the curing effect of the ultraviolet lights is obviously superior to that of 8 ultraviolet lights in the prior art.
And a second diameter gauge 35 is arranged on the second steel pipe 13 below the curing cavity 30, and the optical fiber at the outlet end of the second steel pipe 13 is led out through a traction wheel 36 and collected based on a take-up pulley 37.
The screening unit comprises a first driving wheel 44 and a second driving wheel 40 which are positioned on the same horizontal line; a pulley 39 is arranged below the space between the first driving wheel 44 and the second driving wheel 40; the optical fiber is sequentially wound on the first driving wheel 44, the pulley 39 and the second driving wheel 40, and a force sensor 45 for testing the tension of the optical fiber is arranged on the pulley 39; the rotational speed of the first drive pulley 44 is less than the rotational speed of the second drive pulley 40; the rotating shaft of the first driving pulley 44 is rotatably connected to the servo generator 41, and the servo generator 41 converts mechanical energy into electrical energy and is connected to the grid end 43.
Specifically, the screening of the optical fiber is performed based on the difference between the rotation speeds of the first driving wheel 44 and the second driving wheel 40, if the optical fiber is broken, the optical fiber does not meet the quality requirement, and if the optical fiber is not broken, the requirement is met; meanwhile, based on the speed difference, servo power generation is performed through electric elements such as the inverter 42, and the generated electric energy is sent to the power grid end 43, so that energy is saved.
According to the second embodiment of the present application, a method for manufacturing an optical fiber manufacturing system includes:
s1, starting the traction wheel 36, setting the traction speed of the traction wheel 36, loading the prefabricated glass into the heating cavity 7, heating the prefabricated glass through the graphite 8 in the induction coil 9, and simultaneously injecting argon into the heating cavity 7;
injecting flowing water into the heat insulation cavity 3, and performing heat exchange with air between the heating cavity 7 and the heating furnace 2 to reduce the temperature of the furnace wall of the heating furnace 2;
s2, testing the diameter of the drawn bare fiber by the first diameter gauge 17 in the purifying cavity 16, and if the tested diameter is not in the preset value range, adjusting the rotating speed of the traction wheel 36 until the tested diameter value is in the preset range;
the blower 18 blows external air to the pipe wall of the second steel pipe 13 through the filter 19, and is used for cooling the lower part of the material changing control cavity 14, the upper parts of the second steel pipe 13 and the cooling chamber 21, removing dust and impurities attached to the lower part of the material changing control cavity 14, the upper parts of the second steel pipe 13 and the cooling chamber 21, and discharging the air with residual heat and impurities under the action of the induced draft fan 26;
s3, injecting flowing water into the cooling cavity 22, enabling the water in the cooling cavity 22 to exchange heat with air in the conduction cavity 23, and meanwhile, introducing helium into the conduction cavity 23 to exchange heat with hot air, and further cooling the optical fiber;
s4, cooling the bare optical fiber, and then coating the bare optical fiber in the coating cavity 24;
s5, carrying out ultraviolet curing coating on the coated optical fiber sequentially by using first ultraviolet light 31, second ultraviolet light 32, third ultraviolet light 33 and fourth ultraviolet light 34 at unequal intervals, and carrying out air supply and cooling while curing the first ultraviolet light 31;
s6, testing the diameter of the optical fiber after ultraviolet curing by the second diameter gauge 35, and if the tested diameter is not within the preset range, adjusting the rotating speed and coating parameters of the traction wheel 36 until the tested diameter is within the preset range;
s7, winding the optical fiber meeting the diameter requirement on the take-up pulley 37;
s8, deuterium processing is carried out on the optical fiber by adopting a deuterium processing unit, so that the internal defects of the optical fiber are reduced and eliminated, and the hydrogen loss of the single-mode optical fiber is reduced;
s9, winding the optical fiber after deuterium treatment on the first driving wheel 44, the pulley 39 and the second driving wheel 40, and starting the first driving wheel 40 and the second driving wheel 40, wherein the rotating speed of the first driving wheel 44 is greater than that of the second driving wheel 40; the force sensor 45 collects tension of the optical fiber in real time, if the optical fiber is not broken, the optical fiber meets the quality requirement, and if the optical fiber is broken, the broken optical fiber is removed;
the second rotating wheel drives the first driving wheel to rotate, and drives the servo generator 41 to generate power according to the rotation speed difference of the first driving wheel, and the generated electric energy is transmitted to the power grid.
Replacement of the preform glass rod 1, comprising:
t1, opening the control door 11, rotating to open the connecting piece 12, and enabling the second steel pipe 13 to move downwards and stop moving under the action of the limiting ring 15;
t2, an outlet below the first steel pipe 10 is sealed by a protective cover and is used for being isolated from the heating cavity 7, the temperature in the heating cavity 7 is kept, and gas leakage of the heating cavity 7 is avoided;
t3, replacing the preform glass rod 1, loading the preform glass rod 1 in the heating chamber 7, and synchronously drawing and drawing by the drawing wheel 36.
While the embodiments of the invention have been described in detail in connection with the accompanying drawings, it is not intended to limit the scope of the invention. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.
Claims (8)
1. An optical fiber preparation system, comprising:
a drawing unit for drawing the preform glass rod to form a bare optical fiber and uniformly coating the bare optical fiber to obtain an optical fiber;
the deuterium processing unit is used for reducing and eliminating the internal defects of the optical fiber and reducing the hydrogen loss of the single-mode optical fiber;
a screening unit for selecting optical fibers based on the optical fiber speed difference and the optical fiber stress;
a test unit for optical fiber performance detection and validation;
the wire drawing unit comprises a heating furnace; the middle part of the heating furnace is provided with a heating cavity with the conical bottom for heating the prefabricated glass rod; the heating cavity is made of a stone mill, and a plurality of circles of induction coils are wound on the cavity wall of the heating cavity made of the stone mill; the top of the heating cavity is communicated with a first air inlet pipe for injecting argon; a heat insulation layer for heat insulation and temperature reduction is arranged on the wall of the heating furnace, and flowing water for heat exchange is injected into the heat insulation layer;
an outlet below the heating furnace is communicated with the material changing control cavity, a first steel pipe communicated with the tip end of the heating cavity is arranged in the middle of the material changing control cavity, the lower part of the first steel pipe is communicated with a second steel pipe, the first steel pipe and the second steel pipe are movably connected through a connecting piece, and a limiting ring is welded on the second steel pipe at the outlet end of the material changing control cavity;
the lower half cavity of the material changing control cavity is accommodated in the purification cavity, and a first diameter gauge is arranged on a second steel pipe in the purification cavity; a filter is arranged at the bottom of one side of the purification cavity and is communicated with an external air feeder; the top ends of the opposite sides of the purification cavity are communicated with an exhaust fan through a pipeline;
a cooling chamber is arranged below the purification cavity, and the upper cavity of the cooling chamber is accommodated in the purification cavity; the purification cavity comprises a conduction cavity arranged in the middle, and the second steel pipe penetrates through the conduction cavity; cooling cavities are symmetrically formed in two sides of the conduction cavity, and flowing water for exchanging heat with the conduction cavity is injected into each of the two cooling cavities; the top of the conduction cavity is communicated with a second gas inlet pipe for introducing helium;
a coating cavity is formed in the second steel pipe below the cooling chamber; the coating cavity is communicated with the heating chamber through a pipeline; the heating chamber comprises a heating barrel for concentrated feeding, a heater is arranged on the top wall of the heating chamber, an induced draft fan is arranged at the top of the heating chamber, and the induced draft fan is used for guiding external air into the heater for heating and heating the heating barrel;
a curing cavity is arranged below the coating cavity, and first ultraviolet light, second ultraviolet light, third ultraviolet light and fourth ultraviolet light are distributed in the curing cavity at intervals; the distance between the first ultraviolet light and the second ultraviolet light is 750mm, the distance between the second ultraviolet light and the third ultraviolet light is 500mm, and the distance between the third ultraviolet light and the fourth ultraviolet light is 300 mm;
a second diameter gauge is installed on a second steel pipe below the curing cavity, and the optical fiber at the outlet end of the second steel pipe is led out through a traction wheel and collected based on a take-up pulley;
the screening unit comprises a first driving wheel and a second driving wheel which are positioned on the same horizontal line; a pulley is arranged below the space between the first driving wheel and the second driving wheel; the optical fiber is sequentially wound on the first driving wheel, the pulley and the second driving wheel, and a force sensor for testing the tension of the optical fiber is arranged on the pulley; the rotating speed of the first driving wheel is less than that of the second driving wheel; and a rotating shaft of the first driving wheel is rotationally connected with a servo generator, and the servo generator converts mechanical energy into electric energy and is connected with a power grid end.
2. The optical fiber preparation system of claim 1, wherein: the wall of the heating furnace cavity is made of steel; the inner side of the wall of the heating furnace is provided with a heat insulation cavity, the bottom of one side of the heat insulation cavity is provided with a water injection port, and the top of the opposite side of the heat insulation cavity is provided with a water outlet.
3. The optical fiber preparation system of claim 1, wherein: and one side of the material changing control cavity is provided with a control door.
4. The optical fiber preparation system of claim 1, wherein: the length of the second steel pipe is 2-2.5m, and the diameter of the second steel pipe is 50 mm.
5. The optical fiber preparation system of claim 1, wherein: the heating barrel guides the coating material into the coating cavity through a water pump.
6. The optical fiber preparation system of claim 1, wherein: the air supply pressure of the air supply device is 200Kpa, and the air draft pressure of the induced draft fan is 150 Kpa.
7. A method of making an optical fiber preparation system according to any of claims 1-6, comprising:
s1, starting a traction wheel, setting the traction speed of the traction wheel, loading the prefabricated glass into the heating cavity, heating the prefabricated glass through graphite in the induction coil, and simultaneously injecting argon into the heating cavity;
injecting flowing water into the heat insulation cavity, and performing heat exchange with air between the heating cavity and the heating furnace to reduce the temperature of the furnace wall of the heating furnace;
s2, testing the diameter of the drawn bare fiber by a first diameter gauge in the purifying cavity, and if the tested diameter is not within a preset value range, adjusting the rotating speed of the traction wheel until the tested diameter value is within the preset range;
the air feeder blows external air to the pipe wall of the second steel pipe through the filter, the air feeder is used for cooling the lower part of the material changing control cavity, the second steel pipe and the upper part of the cooling chamber, removing dust and impurities attached to the lower part of the material changing control cavity, the second steel pipe and the upper part of the cooling chamber, and discharging air with residual heat and impurities under the action of the induced draft fan;
s3, injecting flowing water into the cooling cavity, enabling the water in the cooling cavity to exchange heat with air in the conduction cavity, and meanwhile, introducing helium into the conduction cavity to exchange heat with hot air so as to cool the optical fiber;
s4, cooling the bare optical fiber, and then coating the bare optical fiber in a coating cavity;
s5, carrying out ultraviolet curing coating on the coated optical fiber by sequentially passing through a first ultraviolet light, a second ultraviolet light, a third ultraviolet light and a fourth ultraviolet light at unequal intervals, and blowing air for cooling while curing the first ultraviolet light;
s6, testing the diameter of the optical fiber after ultraviolet curing by a second diameter gauge, and if the tested diameter is not within a preset range value, adjusting the rotating speed and coating parameters of the traction wheel until the tested diameter value is within the preset range;
s7, winding the optical fiber meeting the diameter requirement on a take-up pulley;
s8, deuterium processing is carried out on the optical fiber by adopting a deuterium processing unit, so that the internal defects of the optical fiber are reduced and eliminated, and the hydrogen loss of the single-mode optical fiber is reduced;
s9, winding the optical fiber processed by deuterium on a first driving wheel, a pulley and a second driving wheel, and starting the first driving wheel and the second driving wheel, wherein the rotating speed of the first driving wheel is greater than that of the second driving wheel; the force sensor collects tension of the optical fiber in real time, if the optical fiber is not broken, the optical fiber meets the quality requirement, and if the optical fiber is broken, the broken optical fiber is removed;
the second rotating wheel drives the first driving wheel to rotate, and drives the servo generator to generate power according to the rotation speed difference of the first driving wheel, and the generated electric energy is transmitted to a power grid.
8. The method of manufacturing an optical fiber manufacturing system according to claim 7, wherein the replacing of the preform glass rod comprises:
t1, opening the control door, rotating to open the connecting piece, enabling the second steel pipe to move downwards and stop moving under the action of the limiting ring;
t2, adopting a protective cover to seal an outlet below the first steel pipe, and isolating the first steel pipe from the heating cavity to keep the temperature in the heating cavity and avoid the leakage of gas in the heating cavity;
t3, replacing the prefabricated glass rod, loading the prefabricated glass rod in the heating cavity, and synchronously drawing and drawing by the drawing wheel.
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