CN112159121A - Feeding device for online elimination of bubbles in optical fiber coating paint and use method - Google Patents
Feeding device for online elimination of bubbles in optical fiber coating paint and use method Download PDFInfo
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- CN112159121A CN112159121A CN202011040946.2A CN202011040946A CN112159121A CN 112159121 A CN112159121 A CN 112159121A CN 202011040946 A CN202011040946 A CN 202011040946A CN 112159121 A CN112159121 A CN 112159121A
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- 238000000576 coating method Methods 0.000 title claims abstract description 221
- 239000011248 coating agent Substances 0.000 title claims abstract description 220
- 239000003973 paint Substances 0.000 title claims abstract description 45
- 239000013307 optical fiber Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000008030 elimination Effects 0.000 title claims description 3
- 238000003379 elimination reaction Methods 0.000 title claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 238000005192 partition Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 50
- 239000000463 material Substances 0.000 claims description 25
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 17
- 239000007789 gas Substances 0.000 claims description 12
- 239000011229 interlayer Substances 0.000 claims description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 239000010410 layer Substances 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 238000007667 floating Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims 2
- 230000007547 defect Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 3
- 238000001556 precipitation Methods 0.000 abstract 1
- 239000000835 fiber Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000012681 fiber drawing Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000035553 feeding performance Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- C03C25/12—General methods of coating; Devices 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
- C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
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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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- Chemical & Material Sciences (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Coating Apparatus (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
Abstract
The invention discloses a feeding device for eliminating air bubbles in optical fiber coating paint on line and a using method thereof. The device is arranged behind a paint big tank and between a coating mold or a coating cup, is suitable for a non-centralized feeding mode coating system, and is structurally characterized in that a tank body structure with a sealing cover is adopted, a constant-temperature circulating water channel is fully covered around the tank body and is connected with a constant-temperature water bath box to ensure the constant temperature of the tank body, constant-temperature circulating water enters from a constant-temperature circulating water inlet and is discharged from a constant-temperature circulating water outlet through the water channel, optical fiber coating paint mixed with air bubbles enters from a paint inlet, rises to the top of the tank body and is slowly injected from the top of a partition cylinder along the wall, and the air bubble-free paint after air bubble removal and precipitation is supplied into the coating cup and the mold. The excellent design of the invention greatly improves the effect of eliminating bubbles in the coating, and realizes the defects of eliminating coating bubbles and the requirements of improving the quality of optical fibers.
Description
Technical Field
The invention relates to the technical field of optical fiber manufacturing, in particular to a feeding device for eliminating air bubbles in optical fiber coating paint on line and a using method thereof.
Background
The optical fiber preform rod in the optical fiber drawing is melted by a high-temperature drawing furnace and drawn to be made into a bare fiber, the bare fiber can be continuously colored and cabled after being coated and solidified by a coating and subjected to strength screening and parameter detection, the drawing speed can be 3000m/min along with continuous maturity and cost reduction of the drawing technology, and the use of the optical fiber coating is accelerated. The optical fiber coating defect has large influence on the optical fiber quality, the types of the coating defects are more, such as coating unevenness, coating layering, coating impurities, coating bubbles and the like, the relation between more coating defects and coating temperature and coating pressure is larger, and the coating process can be completely stopped by changing the formula. The coating bubble influence factors are coating temperature, pressure and bubbles in the coating, the bubbles in the coating are main factors, the viscosity of the coating is high, and the process formula can be modified to effectively avoid other reasons for removing the bubbles. Coating defects affect both the full-length rate and the qualification rate of optical fiber drawing and the quality of optical fibers.
The current optical fiber coating material supply system can be divided into a centralized material supply mode and an online coating material adding mode. Wherein, the concentrated feeding mode, a plurality of draw-off strip lines use a feeding system, and this system contains a great volume vat, because of the volume enough big and bubble can the come-up eliminate by oneself in the heating environment. In the on-line coating adding mode, the discharging pipe must be lifted away from the liquid level when the coating is replaced, the coating in the pipe flows downwards and is replaced by air, and the residual air in the pipe which is inserted secondarily below the liquid level is the main source of the structural bubbles. The air in the discharge pipe forms a plurality of tiny bubbles through the filter, and the coating has extremely high viscosity due to small volume and small buoyancy, so that the bubbles are difficult to eliminate. The material feeding performance is better when the material feeding device is used in a centralized mode, but the manufacturing cost is higher, the later maintenance investment is larger, the online paint adding mode is simple in structure, strong in flexibility and lower in manufacturing cost.
The current online coating feeding system that adds structure is various, but big samely little difference: interior outer scribble respectively has two big jars of coating, and two big jars of coating bucket direct placing in jar are used in turn, and the system is switched by oneself when coating is in low liquid level in one of them big jar and operating personnel changes the new coating bucket simultaneously. A filter is added behind the paint big tank, and part of the system is designed without the filter. The small tank is arranged behind the filter and is used for placing coating pressure fluctuation, namely a buffer effect when the large tank is switched. The pressure sensor and the coating cup are arranged behind the small tank.
Disclosure of Invention
In order to solve the technical problems, the invention designs a bubble removing device suitable for a non-centralized feeding type coating feeding system based on an online coating adding mode so as to eliminate bubbles in the online coating adding mode system, and further provides a feeding device for eliminating bubbles in optical fiber coating on line and a using method thereof.
The invention discloses a technical scheme of a feeding device for eliminating bubbles in optical fiber coating on line, which comprises the following steps: the device is arranged behind a large paint tank 1 and between a coating die or a coating cup, and is of a tank body structure, a sealing cover 2 is arranged at the top of the tank body, and a liquid level sensor II 21 and a coating pressure air pipe 22 are arranged on the sealing cover 2; the second liquid level sensor 21 penetrates through the sealing cover 2 and penetrates into the separating cylinder 5; the tank body is of a double-layer structure with gaps formed by an inner wall 3 of the tank body and an outer wall 4 of the tank body; a separating cylinder 5 is further arranged in the tank body, the bottom of the separating cylinder 5 is superposed with the bottom of the inner wall 3 of the tank body, the diameter of the separating cylinder 5 is smaller than that of the inner wall 3 of the tank body, and a gap is formed between the separating cylinder 5 and the inner wall 3 of the tank body to form an interlayer 6; the periphery of the inner wall 3 of the tank body is completely covered with a constant-temperature circulating water channel 31, and the constant-temperature circulating water channel 31 is connected with a constant-temperature water bath tank; a coating inlet 7 is arranged at the position of the side wall of the lower part of the tank body, which penetrates through the outer wall 4 and the inner wall 3 of the tank body and is communicated with the interlayer 6, and a coating outlet 8 is arranged at the position, which is opposite to the coating inlet 7, of the side wall of the lower part of the tank body, which penetrates through the outer wall 4 and the inner wall 3 of the tank body; a constant-temperature circulating water inlet 9 is formed above the coating inlet 7 and penetrates through the outer wall 4 of the tank body; and a constant-temperature circulating water outlet 10 is arranged above the coating outlet 8 and close to the tank sealing cover 2.
Furthermore, a plurality of large paint tanks 1 are provided; a sealing cover plate of the large paint tank 1 is connected with a pressure air pipe 11, a first liquid level sensor 12 and a paint outlet pipe 13; a one-way valve or a pneumatic valve and a filter are arranged at the position of the coating outlet pipe 13 and are used for controlling the switching of the large coating tank and filtering impurities in the coating; constant-temperature circulating water channels are arranged on the inner wall of the paint big tank 1 and the periphery of the filter; the coating material outlet pipe 13 is connected to the coating material inlet 7.
Further, the constant temperature water bath box is arranged outside the device, and provides water circulation power for the constant temperature circulating water channel 31 through a constant temperature water tank with a booster pump, the constant temperature water tank is provided with an automatic temperature control system, the constant temperature is 55 ℃, wherein the constant temperature circulating water enters from a constant temperature circulating water inlet 9 and is discharged from a constant temperature circulating water outlet 10 through the constant temperature circulating water channel 31.
Further, the device jar body volume is 30 ~ 60 liters, and jar body bottom effective diameter is 1 with the height ratio: 1.5 to 2.5.
Furthermore, the high liquid level of the tank body of the device is 4/5 at the height of the separation cylinder 5, and the low liquid level of the tank body of the device is 3/5 at the height of the separation cylinder 5; and a gap interlayer 6 of 10mm is formed between the periphery of the outer wall of the separating cylinder 5 and the inner wall 3 of the tank body.
Further, the clearance between the inner wall 3 of the tank body and the outer wall 4 of the tank body is 20mm, and a support 14 is arranged between the inner wall 3 of the tank body and the bottom of the outer wall 4 of the tank body.
Further, purified nitrogen is used as the gas introduced into the pressure gas pipe 11 and the coating pressure gas pipe 22.
Furthermore, the partition cylinder 5 can be provided with a bulge which can be in a wave shape, a semi-circle shape, a semi-ellipse shape and a triangular shape, and the aim is to reduce the flow rate of the coating or increase the attachment area. In addition, any mechanism arrangement on the tank or the newly added tank of the device for reducing the flow rate of the coating or increasing the attachment area is the protection scope of the device.
The use method of the feeding device for eliminating the bubbles in the optical fiber coating paint on line specifically comprises the following steps:
step one, preparation before coating: the device is arranged between a coating replacing tank, namely the rear part of a large coating tank 1, and a coating using end, namely a coating mould or a coating cup, the air tightness of each part of the device is checked, a constant-temperature water bath box and a constant-temperature water tank with a booster pump are used for providing water circulation power for a constant-temperature circulation water channel, the large coating tank 1, a filter, the inner wall 3 of the tank body of the device and the outer wall 4 of the tank body are preheated, the constant temperature of an automatic temperature control system is 55 ℃, the viscosity of the coating is ensured, and the gel phenomenon is avoided;
step two, eliminating bubbles by the online coating: the pressure air pipe 11 in the paint big tank 1 is in a continuous air supply state, and the introduced gas is purified nitrogen; when the first liquid level sensor 12 detects that the coating liquid level in the large coating tank 1 is limited downwards, the large coating tank 1 is controlled and switched by a one-way valve or a pneumatic valve; the coating that is mingled with the bubble supplies to in coating import 7 through the filter through coating exit tube 13, again along the interior wall 3 of jar body and the intermediate layer 6 between the separating tube 5 upward flow rise to jar body top again along the wall slowly pour into in separating tube 5 from separating tube 5 top, in this process, because the intermediate layer 6 space is enough big, guaranteed that the coating slowly evenly rises along each direction around separating tube 5, the velocity of flow that the coating rises has been reduced, make the coating form enough films around separating tube 5, most bubbles break gradually at this moment, few bubbles are because of the low reason of the velocity of flow, slowly contact the coating liquid level and remain at the coating liquid level when entering separating tube 5 inside, rely on buoyancy to eliminate the bubble completely along with the gradual come-up of coating liquid level under the sufficient volume condition. In the process, the phenomenon that bubbles are deeply buried below the liquid level of the coating due to too high flow speed and are conveyed to a coating die or a coating cup in time of floating is avoided; the coating pressure air pipe 22 provides nitrogen pressure according to the preset coating pressure to stand for a long enough time, and pure coating with bubbles eliminated is supplied into a coating cup or a mold from the coating outlet 8 to finish optical fiber coating; when the second liquid level sensor 21 senses a low liquid level of the coating, the one-way valve or the pneumatic valve controls the large feeding tank 1 to work and inject the coating into the separating cylinder 5, and when the second liquid level sensor 21 senses a high liquid level of the coating, the one-way valve or the pneumatic valve is closed or the flow rate of the coating is reduced;
step three, circulating a water circulating system: the constant temperature circulating water enters from the constant temperature circulating water inlet 9 and is discharged from the constant temperature circulating water outlet 10 through the constant temperature circulating water channel 31, circulation is formed, and effective water saving resources and electric energy are tried out.
Further, in the step of eliminating bubbles in the on-line coating, the coating is discharged from the coating inlet 7 to the coating outlet 8 and is supplied to the coating cup, the drawing speed of the device is usually 2400m/min, and the volume of the device can be properly adjusted to match the drawing speed.
Compared with the prior art, the invention has the following beneficial effects: the device has the advantages of simple structure, low cost, simple operation and labor saving, greatly improves the effect of eliminating bubbles in coating, and realizes the purposes of eliminating the defects of coating bubbles and improving the quality of optical fibers. Through the setting of the coating velocity of flow and increase jar body adhesion area, make the bubble in the coating rise to jar interior coating liquid surface and rupture more easily, both inherited the advantage of adding the coating system on line, also can eliminate the optic fibre simultaneously and coat the defect and guarantee the optic fibre quality.
Drawings
FIG. 1 is a sectional view showing the structure of a supply apparatus for eliminating bubbles in a coating material for optical fibers on-line according to the present invention;
FIG. 2 is a cross-sectional view of the bottom joint of the apparatus of the present invention;
FIG. 3 is a schematic view of the apparatus for eliminating bubbles;
FIG. 4 is a schematic diagram of the operation of the apparatus of the present invention.
In the figure: 1. a large paint tank; 11. a pressure air pipe; 12. a first liquid level sensor; 13. a coating outlet pipe; 14. a support; 2. a sealing cover; 21. a liquid level sensor II; 22. coating a pressure air pipe; 3. the inner wall of the tank body; 31. a constant temperature circulating water channel; 4. the outer wall of the tank body; 5. a separating cylinder; 6. an interlayer; 7. a coating inlet; 8. a coating outlet; 9. a constant temperature circulating water inlet; 10. and a constant-temperature circulating water outlet.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to the attached drawings 1, 2 and 4, the invention provides a feeding device for eliminating air bubbles in optical fiber coating paint on line, which is arranged behind a paint big tank 1 and between a coating die or a coating cup, and is of a tank structure, wherein the top of the tank is provided with a sealing cover 2, and the sealing cover 2 is provided with a second liquid level sensor 21 and a coating pressure air pipe 22; the second liquid level sensor 21 penetrates through the sealing cover 2 and penetrates into the separating cylinder 5; the tank body is of a double-layer structure with gaps formed by an inner wall 3 of the tank body and an outer wall 4 of the tank body; a separating cylinder 5 is also arranged in the tank body, the bottom of the separating cylinder 5 is superposed with the bottom of the inner wall 3 of the tank body, the diameter of the separating cylinder 5 is smaller than that of the inner wall 3 of the tank body, and a gap is formed between the separating cylinder 5 and the inner wall 3 of the tank body to form an interlayer 6; the periphery of the inner wall 3 of the tank body is completely covered with a constant-temperature circulating water channel 31, and the constant-temperature circulating water channel 31 is connected with a constant-temperature water bath tank; a coating inlet 7 is arranged at the position of the side wall of the lower part of the tank body, which penetrates through the outer wall 4 and the inner wall 3 of the tank body and is communicated with the interlayer 6, and a coating outlet 8 is arranged at the position, which is opposite to the coating inlet 7, of the side wall of the lower part of the tank body, which penetrates through the outer wall 4 and the inner wall 3 of the tank body; a constant-temperature circulating water inlet 9 is arranged above the coating inlet 7 and penetrates through the outer wall 4 of the tank body; a constant-temperature circulating water outlet 10 is arranged above the coating outlet 8 and close to the tank sealing cover 2.
Preferably, a plurality of large paint tanks 1 are provided; a sealing cover plate of the large paint tank 1 is connected with a pressure air pipe 11, a first liquid level sensor 12 and a paint outlet pipe 13; a one-way valve or a pneumatic valve and a filter are arranged at the position of the coating outlet pipe 13 and are used for controlling the switching of the large coating tank and filtering impurities in the coating; a constant-temperature circulating water channel is arranged on the inner wall of the paint tank 1 and around the filter; the paint outlet pipe 13 is connected to the paint inlet 7.
Preferably, the constant temperature water bath box is arranged outside the device and provides water circulation power for the constant temperature circulation water channel 31 through a constant temperature water tank with a booster pump, the constant temperature water tank is provided with an automatic temperature control system, the constant temperature is 55 ℃, wherein the constant temperature circulation water enters from the constant temperature circulation water inlet 9 and is discharged from the constant temperature circulation water outlet 10 through the constant temperature circulation water channel 31.
Preferably, the device jar body volume is 30 ~ 60 liters, and jar body bottom effective diameter is 1 with the height ratio: 1.5 to 2.5.
Preferably, the high liquid level of the tank body of the device is 4/5 at the height of the separation cylinder 5, and the low liquid level is 3/5 at the height of the separation cylinder 5; a gap interlayer 6 of 10mm is formed between the periphery of the outer wall of the separating cylinder 5 and the inner wall 3 of the tank body.
Preferably, the clearance between the inner wall 3 and the outer wall 4 of the tank body is 20mm, and a support 14 is arranged between the inner wall 3 and the bottom of the outer wall 4 of the tank body.
Preferably, the gas introduced into the pressure gas pipe 11 and the coating pressure gas pipe 22 is purified nitrogen gas.
Preferably, the partition 5 may be further provided with a protrusion, which may be in a wave shape, a semi-circle shape, a semi-ellipse shape, or a triangle shape, in order to reduce the flow rate of the coating material or increase the attachment area. In addition, any mechanism arrangement on the tank or the newly added tank of the device for reducing the flow rate of the coating or increasing the attachment area is the protection scope of the device.
Example 2
Referring to fig. 1-4, the method for using a feeding device for online removing bubbles in a coating material for optical fiber coating of the present invention specifically includes the following steps:
step one, preparation before coating: the device is arranged between a coating replacing tank, namely the rear part of a large coating tank 1, and a coating using end, namely a coating mould or a coating cup, the air tightness of each part of the device is checked, a constant-temperature water bath box and a constant-temperature water tank with a booster pump are used for providing water circulation power for a constant-temperature circulation water channel, the large coating tank 1, a filter, the inner wall 3 of the tank body of the device and the outer wall 4 of the tank body are preheated, the constant temperature of an automatic temperature control system is 55 ℃, the viscosity of the coating is ensured, and the gel phenomenon is avoided;
step two, eliminating bubbles by the online coating: the pressure air pipe 11 in the paint big tank 1 is in a continuous air supply state, and the introduced gas is purified nitrogen; when the first liquid level sensor 12 detects that the coating liquid level in the large coating tank 1 is limited downwards, the large coating tank 1 is controlled and switched by a one-way valve or a pneumatic valve; the coating that is mingled with the bubble supplies to in coating import 7 through the filter through coating exit tube 13, again along the interior wall 3 of jar body and the intermediate layer 6 between the separating tube 5 upward flow rise to jar body top again along the wall slowly pour into in separating tube 5 from separating tube 5 top, in this process, because the intermediate layer 6 space is enough big, guaranteed that the coating slowly evenly rises along each direction around separating tube 5, the velocity of flow that the coating rises has been reduced, make the coating form enough films around separating tube 5, most bubbles break gradually at this moment, few bubbles are because of the low reason of the velocity of flow, slowly contact the coating liquid level and remain at the coating liquid level when entering separating tube 5 inside, rely on buoyancy to eliminate the bubble completely along with the gradual come-up of coating liquid level under the sufficient volume condition. In the process, the phenomenon that bubbles are deeply buried below the liquid level of the coating due to too high flow speed and are conveyed to a coating die or a coating cup in time of floating is avoided; the coating pressure air pipe 22 provides nitrogen pressure according to the preset coating pressure to stand for a long enough time, and pure coating with bubbles eliminated is supplied into a coating cup or a mold from the coating outlet 8 to finish optical fiber coating; when the second liquid level sensor 21 senses a low liquid level of the coating, the one-way valve or the pneumatic valve controls the large feeding tank 1 to work and inject the coating into the separating cylinder 5, and when the second liquid level sensor 21 senses a high liquid level of the coating, the one-way valve or the pneumatic valve is closed or the flow rate of the coating is reduced;
step three, circulating a water circulating system: the constant-temperature circulating water enters from the constant-temperature circulating water inlet 9 and is discharged from the constant-temperature circulating water outlet 10 through the constant-temperature circulating water channel 31.
Preferably, in the online coating material bubble removal step, the coating material is discharged from the coating material inlet 7 to the coating material outlet 8 and is fed into the coating cup, the drawing speed of the device is usually 2400m/min, and the volume of the device can be properly adjusted to match the drawing speed.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a feedway of bubble in elimination optical fiber coating material on line which characterized in that: the device is arranged behind a large coating tank (1) and between a coating die or a coating cup, and is of a tank body structure, a sealing cover (2) is arranged at the top of the tank body, and a liquid level sensor II (21) and a coating pressure air pipe (22) are arranged on the sealing cover (2); the second liquid level sensor (21) penetrates through the sealing cover (2) to penetrate into the separating cylinder (5); the tank body is of a double-layer structure with gaps formed by an inner wall (3) of the tank body and an outer wall (4) of the tank body; a separating cylinder (5) is further arranged in the tank body, the bottom of the separating cylinder (5) is superposed with the bottom of the inner wall (3) of the tank body, the diameter of the separating cylinder (5) is smaller than that of the inner wall (3) of the tank body, and a gap is formed between the separating cylinder and the inner wall (3) of the tank body to form an interlayer (6); the periphery of the inner wall (3) of the tank body is completely covered with a constant-temperature circulating water channel (31), and the constant-temperature circulating water channel (31) is connected with a constant-temperature water bath tank; a paint inlet (7) is formed in the position, where the side wall of the lower part of the tank body penetrates through the outer wall (4) and the inner wall (3) of the tank body and leads to the interlayer (6), and a paint outlet (8) is formed in the position, opposite to the paint inlet (7), of the lower part of the tank body, penetrates through the outer wall (4) and the inner wall (3) of the tank body and leads to the outside of the tank body; a constant-temperature circulating water inlet (9) is arranged above the coating inlet (7) and penetrates through the outer wall (4) of the tank body; a constant-temperature circulating water outlet (10) is arranged above the coating outlet (8) and close to the tank sealing cover (2).
2. The apparatus of claim 1, wherein the supply device for eliminating bubbles in the coating material of the optical fiber comprises: a plurality of large paint tanks (1) are arranged; a sealing cover plate of the large paint tank (1) is connected with a pressure air pipe (11), a first liquid level sensor (12) and a paint outlet pipe (13); a one-way valve or a pneumatic valve and a filter are arranged at the position of the coating outlet pipe (13); constant-temperature circulating water channels are arranged on the inner wall of the paint big tank (1) and the periphery of the filter; the coating outlet pipe (13) is connected with the coating inlet (7).
3. The apparatus of claim 1, wherein the supply device for eliminating bubbles in the coating material of the optical fiber comprises: the constant-temperature water bath box is arranged outside the device, and provides water circulation power for the constant-temperature circulation water channel (31) through a constant-temperature water tank with a booster pump, the constant-temperature water tank is provided with an automatic temperature control system, and the constant temperature is 55 ℃.
4. The apparatus of claim 1, wherein the supply device for eliminating bubbles in the coating material of the optical fiber comprises: the device jar body volume is 30 ~ 60 liters, and jar body bottom effective diameter is 1 with the height ratio: 1.5 to 2.5.
5. The apparatus of claim 1, wherein the supply device for eliminating bubbles in the coating material of the optical fiber comprises: the high liquid level of the tank body of the device is 4/5 of the height of the separating cylinder (5), and the low liquid level is 3/5 of the height of the separating cylinder (5); a gap interlayer (6) of 10mm is formed between the periphery of the outer wall of the separating cylinder (5) and the inner wall (3) of the tank body.
6. The feeding device for eliminating the air bubbles in the optical fiber coating paint on line according to the claim 1, characterized in that the gap between the inner wall (3) and the outer wall (4) of the tank body is 20mm, and a bracket (14) is arranged between the inner wall (3) and the bottom of the outer wall (4) of the tank body.
7. The apparatus of claim 1, wherein the supply device for eliminating bubbles in the coating material of the optical fiber comprises: purified nitrogen is adopted as the gas introduced into the pressure gas pipe (11) and the coating pressure gas pipe (22).
8. A supply device for eliminating air bubbles in the coating material of optical fibers on line according to claim 1 or 5, characterized in that the partition (5) is further provided with protrusions which can be wave-shaped, semi-circular, semi-elliptical and triangular.
9. A use method of a feeding device for eliminating air bubbles in optical fiber coating paint on line specifically comprises the following steps:
step one, preparation before coating: the device is arranged between a coating replacing tank, namely the rear part of a large coating tank (1), and a coating using end, namely a coating mould or a coating cup, the air tightness of each part of the device is checked, water circulation power is provided for a constant-temperature circulation water channel through a constant-temperature water bath box and a constant-temperature water tank with a booster pump, the large coating tank (1), a filter, the inner wall (3) of the tank body of the device and the outer wall (4) of the tank body are preheated, the constant temperature of an automatic temperature control system is 55 ℃, the viscosity of the coating is ensured, and the gel phenomenon is avoided;
step two, eliminating bubbles by the online coating: a pressure air pipe (11) in the paint big tank (1) is in a continuous air supply state, and the introduced gas is purified nitrogen; when the liquid level sensor I (12) detects that the coating in the large coating tank (1) is limited at the lower part of the coating liquid level, the large coating tank (1) is controlled and switched by a one-way valve or a pneumatic valve; the paint mixed with air bubbles is supplied to a paint inlet (7) through a filter through a paint outlet pipe (13), flows upwards along an interlayer (6) between the inner wall (3) of the tank body and the separating cylinder (5), rises to the top of the tank body, and is slowly injected into the separating cylinder (5) from the top of the separating cylinder (5) along the wall, in the process, as the space of the interlayer (6) is large enough, the paint is ensured to slowly and uniformly rise along all directions around the separating cylinder (5), the rising flow rate of the paint is reduced, the paint forms an enough film around the separating cylinder (5), most of the air bubbles are gradually broken, and a small part of the air bubbles are slowly contacted with the liquid level of the paint and are kept on the liquid level of the paint when entering the inside of the separating cylinder (5) due to low flow rate, and the air bubbles are completely eliminated by buoyancy along with the gradual rising of; in the process, the phenomenon that bubbles are deeply buried below the liquid level of the coating due to too high flow speed and are conveyed to a coating die or a coating cup in time of floating is avoided; the coating pressure air pipe (22) provides nitrogen pressure according to the preset coating pressure to stand for a long enough time, and pure coating with bubbles eliminated is supplied into a coating cup or a mold from a coating outlet (8) to finish optical fiber coating; when the second liquid level sensor (21) senses the low liquid level of the coating, the one-way valve or the pneumatic valve controls the large feeding tank (1) to work and inject the coating into the separating cylinder (5), and when the second liquid level sensor (21) senses the high liquid level of the coating, the one-way valve or the pneumatic valve is closed or the flow rate of the coating is reduced;
step three, circulating a water circulating system: the constant-temperature circulating water enters from a constant-temperature circulating water inlet (9) and is discharged from a constant-temperature circulating water outlet (10) through a constant-temperature circulating water channel (31) to form circulation.
10. The method of claim 9, wherein the feeding device for eliminating bubbles in the coating material for optical fiber coating is discharged from the coating material inlet (7) to the coating material outlet (8) and fed into the coating cup in the step of eliminating bubbles in the coating material online, and the drawing speed of the device is generally 2400m/min, and the volume of the device can be properly adjusted to match the drawing speed.
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| CN112979183A (en) * | 2021-03-05 | 2021-06-18 | 上海先权光纤科技有限公司 | Optical fiber drawing coating device |
| CN113246440A (en) * | 2021-05-07 | 2021-08-13 | 广西裕阳科技有限公司 | Method for reducing breakage of bubbles on surface of pipe in vacuum forming process of pipe |
| CN113292257A (en) * | 2021-05-08 | 2021-08-24 | 通鼎互联信息股份有限公司 | Device and method for eliminating optical fiber coating bubbles on line |
| CN114751658A (en) * | 2022-05-24 | 2022-07-15 | 深圳市达富光通信有限公司 | Optical fiber coating machine |
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