CN113880424A - Crucible pressurization adjusting device and method for producing glass fibers - Google Patents
Crucible pressurization adjusting device and method for producing glass fibers Download PDFInfo
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- CN113880424A CN113880424A CN202111141843.XA CN202111141843A CN113880424A CN 113880424 A CN113880424 A CN 113880424A CN 202111141843 A CN202111141843 A CN 202111141843A CN 113880424 A CN113880424 A CN 113880424A
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- 239000003365 glass fiber Substances 0.000 title claims abstract description 57
- 238000004519 manufacturing process Methods 0.000 title abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 77
- 239000006060 molten glass Substances 0.000 claims abstract description 75
- 238000000034 method Methods 0.000 claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims abstract description 19
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 239000011521 glass Substances 0.000 claims description 45
- 239000000835 fiber Substances 0.000 claims description 19
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 239000000919 ceramic Substances 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 6
- 239000011819 refractory material Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000000565 sealant Substances 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 238000007380 fibre production Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- PXXKQOPKNFECSZ-UHFFFAOYSA-N platinum rhodium Chemical compound [Rh].[Pt] PXXKQOPKNFECSZ-UHFFFAOYSA-N 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910000629 Rh alloy Inorganic materials 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002990 reinforced plastic Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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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
- C03B37/07—Controlling or regulating
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B3/00—Charging the melting furnaces
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
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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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- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
The invention discloses a crucible pressurizing and adjusting device and method for producing glass fibers. The crucible body comprises a crucible wall and a molten glass cavity; the ball adding device comprises a ball adding machine, a ball adding valve and a gear transmission mechanism; the pressurizing device comprises an air compressor, a pressurizing channel and a liquid level detector. One end of the ball adding pipe is connected with the ball adding machine, and the other end of the ball adding pipe is connected with the spherical rotating piece; the spherical rotating piece is arranged in the ball valve adding shell; the annular convex edge is arranged in a gap between the ball adding valve shell and the spherical rotating piece; one end of the ball inlet pipe is connected with the spherical rotating part, and the other end of the ball inlet pipe is communicated with the molten glass cavity; the driving motor is connected with the transmission bearing through a gear box and finally connected with the spherical rotating part; the air compressor is communicated with the molten glass cavity through the pressurizing channel; the controller is connected to the driving motor and the air compressor. The device can improve the yield and the quality of the fine glass fibers of 3-5 mu m, and has the advantages of simple method and low cost.
Description
Technical Field
The invention relates to the field of glass fiber production and manufacturing, in particular to a crucible pressurization adjusting device and method for producing glass fibers.
Background
The existing continuous glass fiber production method in the world comprises two processes, namely a tank furnace method and a crucible method. The glass fiber with the diameter of 7-20 mu m is produced by a tank furnace method, the annual output is 3 ten thousand-50 ten thousand tons/year per seat, the fiber with the diameter of 3-6 mu m is produced by a crucible method, the annual output is tens of tons/platform per year, and the production efficiency is less than one hundredth of that of the tank furnace method. The tank furnace method belongs to a one-step forming process, and is characterized in that various mineral raw materials are directly melted in a furnace and then directly produced into glass fibers; the crucible method belongs to a secondary forming process, and is characterized in that various mineral raw materials are heated and melted to prepare glass balls which are consistent in weight, convenient to roll and convenient to add, and then the glass balls are remelted in a crucible to generate glass fibers. The crucible method is suitable for producing glass fiber with a relatively small diameter, and has the advantages that the demand of various types of fine fiber is small, the components are different, so that only tens of tons of fine glass fiber can be produced every year, the energy for keeping raw materials in a molten state by the crucible method is far more than the energy required for producing common glass fiber, and the record of producing the glass fiber with a special component by the tank furnace method is not available so far, so that the prior art is short of technical means in the aspect of producing the fine glass fiber.
In recent years, the demand of fine glass fibers with the diameter of less than 5 mu m in industries such as electrical insulation, reinforced plastics, war industry and the like is increased, but the crucible method always uses metal plates with the holes of less than 200 holes and even 50 holes, and the labor and energy consumption required for producing the fine glass fibers with the diameter of less than 5 mu m is tens of times higher than that of producing general glass fibers with the diameter of 9-13 mm.
Aiming at the defects of the prior art, a crucible pressurizing and adjusting device and a crucible pressurizing and adjusting method for producing glass fibers are urgently needed.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a crucible pressurization adjusting device and method for producing glass fibers, wherein the crucible pressurization adjusting device can improve the yield and quality of fine glass fibers of 3-5 mu m, and the method is simple and low in cost.
In order to solve the technical problems, the invention adopts the technical scheme that:
a crucible pressurizing and adjusting device for producing glass fibers comprises a ball adding device, a pressurizing device and a controller which are distributed in a crucible body.
The crucible body includes a crucible wall and a molten glass chamber.
The ball adding device comprises a ball adding machine, a ball adding valve and a gear transmission mechanism.
The ball adding valve is arranged in the crucible wall of the molten glass cavity; the ball adding valve comprises a ball adding pipe, a ball adding valve shell, a spherical rotating piece, an annular convex rib and a ball inlet pipe.
One end of the ball adding pipe is connected with the ball adding machine, and the other end of the ball adding pipe penetrates through the crucible wall and the ball adding valve shell and is connected with the spherical rotating piece; the spherical rotating piece is arranged in the ball valve adding shell; the annular convex edge is arranged at a gap part between the ball adding valve shell and the spherical rotating piece; concave holes for placing glass balls added through the ball adding pipe are distributed on the spherical rotating piece; one end of the ball inlet pipe is connected with the spherical rotating part, and the other end of the ball inlet pipe penetrates through the ball adding valve shell and the crucible wall and is communicated with the molten glass cavity.
The gear transmission mechanism comprises a driving motor, a gear box and a transmission bearing.
The driving motor is connected with one end of the gear box, and the other end of the gear box is connected with the transmission bearing; the driving bearing penetrates through the crucible wall and the ball adding valve shell and is finally connected with the spherical rotating piece.
The pressurizing device comprises an air compressor, a pressurizing channel and a liquid level detector.
One end of the pressurizing channel is connected with the air compressor, and the other end of the pressurizing channel penetrates through the crucible body and is communicated with the molten glass cavity.
The liquid level detector is arranged in the molten glass cavity.
One end of the controller is connected with the liquid level detector, and the other end of the controller is divided into two paths which are connected to a driving motor of the gear transmission mechanism and an air compressor of the pressurizing device.
Further preferably, the outer wall of the crucible body and the outer wall of the molten glass chamber are provided with a refractory material.
Further preferably, the horizontal two ends of the ball adding valve are provided with ceramic bearings which support the ball adding valve and are fixed in the crucible wall.
Further preferably, the length of the ball adding valve side is 5-10 cm, the diameter of the spherical rotating member is 5-10 cm, and the diameter of the spherical rotating member is smaller than the length of the ball adding valve side.
As a further preferred feature of the present invention, the outer wall of the said balloon valve housing is provided with a sealing layer and coated with a high temperature resistant rubber plastic pad.
In a further preferred embodiment of the present invention, the spherical rotating member is made of a refractory cement concrete material.
As a further preferred aspect of the present invention, an elastic sealant is provided between the spherical rotary member and the annular rib.
As a further preferred aspect of the present invention, a check valve is provided in the pressurizing passage.
As a further preferred aspect of the present invention, a barometer for monitoring the pressure of the gas is further disposed in the pressurizing passage.
Further preferably, the pressurizing passage is provided with a liquid observation hole for observing the molten glass chamber.
An adjusting method of a crucible pressurization adjusting device for producing glass fibers specifically comprises the following steps:
s1, starting a ball adding machine of the ball adding device, and adding raw material glass balls into the crucible through the ball adding machine;
s2, starting an air compressor of the pressurizing device, and pressurizing the molten glass cavity through the pressurizing channel, wherein the normal working pressure of the molten glass cavity is 0.2 bar; the gas pressure of the pressurizing channel can be monitored through a barometer;
s3, observing the liquid level of the glass solution in the molten glass cavity through the liquid observing hole, and controlling the quantity of the glass balls added by the ball adding valve by the driving motor to ensure that the molten glass cavity is at the initial liquid level;
s4, detecting the liquid level height of the molten glass in the molten glass cavity in real time through a liquid level detector; when the liquid level of the glass is reduced and is 1cm lower than the set value, the controller is communicated with the driving motor to accelerate the rotating speed of the gear box and increase the ball inlet amount by 50 percent so as to maintain the liquid level height of the molten glass cavity to reach the initial liquid level; when the liquid level is stable, the controller is communicated with the driving motor and automatically returns to the original fixed rotating speed of 1-2 r/min;
s5, detecting the liquid level height of the molten glass in the molten glass cavity in real time through a liquid level detector; when the liquid level of the glass rises and exceeds a set value by 1cm, the controller is communicated with an air compressor to increase the gas pressure in the molten glass cavity to 1bar at most; the fiber discharging of the glass fiber is accelerated by increasing the pressure, and the liquid level height of the molten glass cavity is reduced; when the liquid level is stable, the controller drives the air compressor to reduce the gas pressure in the molten glass cavity to 0.2 bar.
The invention has the following beneficial effects:
1. the method can improve the yield and the quality of the fine glass fibers of 3-5 mu m, and is simple, low in energy consumption and low in cost.
2. The invention can improve and stabilize the flow of the glass fiber strands in the bushing plate in a pressurizing mode and reduce the time for re-guiding the machine for breaking the glass fibers.
3. The invention increases the pressure of the liquid level to the bushing plate, does not change the resistance (drawing viscosity, namely Teluton viscosity) of glass liquid flow resisting single axial stretching force during fiber forming, and does not increase the pressure relaxation time during fiber forming.
4. The invention is beneficial to improving the production replacement rate of the crucible, reduces the energy consumption for maintaining the molten state of the glass and prevents the pollution caused by long-time contact of the molten glass and the refractory material.
Drawings
FIG. 1 is a schematic view showing the connection of a pressure adjusting apparatus for a crucible used in the production of glass fiber according to the present invention.
FIG. 2 is a schematic view showing the overall structure of a pressure regulating apparatus for a crucible used in the production of glass fibers according to the present invention.
FIG. 3 is a sectional view of a ball-adding apparatus of a crucible pressurization adjusting apparatus for producing glass fiber according to the present invention.
FIG. 4 is a schematic view of a bulb adding valve housing of a crucible pressurization adjusting device for producing glass fiber according to the present invention.
FIG. 5 is a schematic view showing the structure of a spherical rotary member of a crucible pressurization adjusting apparatus for producing glass fibers according to the present invention.
FIG. 6 is a schematic view showing a first ball adding valve of the pressure regulating apparatus for a crucible used in the production of glass fiber according to the present invention.
FIG. 7 is a schematic view showing a second ball adding valve of the pressure regulating apparatus for a crucible used in the production of glass fiber according to the present invention.
FIG. 8 is a schematic view showing a third ball adding valve of the pressure regulating apparatus for a crucible used in the production of glass fiber according to the present invention.
FIG. 9 is a schematic view showing a fourth ball adding valve of the pressure regulating apparatus for a crucible used in the production of glass fiber according to the present invention.
Among them are:
10. a crucible body; 11. a crucible wall; 12. a molten glass chamber;
20. a ball adding device; 21. adding a ball machine; 22. adding a ball valve; 221. adding a bulb tube; 222. a ball valve housing; 223. a spherical rotating member; 224. an annular rib; 225. concave holes; 226. a ball inlet pipe; 227. a ceramic bearing; 23. a gear transmission mechanism; 231. a drive motor; 232. a gear case; 233. a drive bearing;
30. a pressurizing device; 31. an air compressor; 32. a pressurizing channel; 33. a liquid level detector; 34. a one-way valve; 35. a barometer;
40. and a controller.
Detailed Description
In the description of the present invention, it is to be understood that the terms "left side", "right side", "upper part", "lower part", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and that "first", "second", etc., do not represent an important degree of the component parts, and thus are not to be construed as limiting the present invention. The specific dimensions used in the present example are only for illustrating the technical solution and do not limit the scope of protection of the present invention.
The present invention will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.
As shown in FIG. 1, a crucible pressurization adjusting device for producing glass fiber comprises a ball adding device 20 arranged on a crucible body 10, a pressurizing device 30 and a controller 40.
As shown in fig. 2, the crucible body 10 includes a crucible wall 11 and a molten glass chamber 12; the ball adding device 20 comprises a ball adding machine 21, a ball adding valve 22 and a gear transmission mechanism 23; the pressurizing device 30 includes an air compressor 31, a pressurizing passage 32, and a liquid level detector 33.
The outer wall of the crucible body 10 and the molten glass chamber 12 are provided with refractory materials.
As shown in FIG. 3, the ball adding valve 22 is arranged in the crucible wall 11; the ball adding valve 22 comprises a ball adding pipe 221, a ball adding valve shell 222, a spherical rotating member 223, an annular convex rib 224, a concave hole 225, a ball inlet pipe 226 and a ceramic bearing 227.
One end of the ball adding pipe 221 is connected with the ball adding machine 21, and the other end of the ball adding pipe passes through the crucible wall 11 and the ball adding valve shell 222 and is connected with the spherical rotating piece 223; the spherical rotating member 223 is arranged in the ball adding valve housing 222; the spherical rotary member 223 is made of refractory cement concrete.
As shown in fig. 4, the adding ball valve housing 222 is rectangular, and the outer wall of the adding ball valve housing 222 is provided with a sealing layer and covered with a high temperature resistant rubber plastic pad;
the annular rib 224 is arranged at a gap portion between the ball adding valve housing 222 and the spherical rotary member 223; an elastic sealant is disposed between the spherical rotary member 223 and the annular rib 224.
As shown in fig. 5, a concave hole 225 for placing the glass ball added through the ball adding pipe 221 is distributed on the spherical rotating member 223; the inlet bulb 226 is connected at one end to a spherical rotating member 223 and at the other end passes through the bulb housing 222 and the crucible wall 11 to communicate with the molten glass chamber 12.
The horizontal two ends of the ball adding valve 22 are provided with ceramic bearings 227, and the ceramic bearings 227 support the ball adding valve 22 and fix the ball adding valve in the crucible wall 11.
The side length of the ball adding valve 22 is 5-10 cm, the diameter of the spherical rotating part 223 is 5-10 cm, and the diameter of the spherical rotating part 223 is smaller than the side length of the ball adding valve 22.
The gear transmission mechanism 23 includes a drive motor 231, a gear box 232, and a transmission bearing 233.
The driving motor 231 is connected with one end of the gear box 232, and the other end of the gear box 232 is connected with the transmission bearing 233; the drive bearing 233 passes through the crucible wall 11 and the ball feed valve housing 222 and is ultimately connected to the spherical rotating member 223.
The pressurizing device 30 includes an air compressor 31, a pressurizing passage 32, and a liquid level detector 33.
One end of the pressurizing channel 32 is connected with the air compressor 31, the other end of the pressurizing channel penetrates through the crucible wall 11 and is communicated with the molten glass cavity 12, and the normal working pressure of the molten glass cavity 12 is 0.2bar and can be pressurized to 1 bar.
A check valve 34 and a barometer 35 for monitoring the pressure of the gas are provided in the pressurizing passage 32.
The pressurizing passage 32 is also provided with a liquid observation hole 36 for observing the molten glass chamber 12.
The liquid level detector 33 is disposed in the molten glass chamber 12.
One end of the controller 40 is connected with the liquid level detector 33, and the other end is divided into two paths and connected with a driving motor 231 of the gear transmission mechanism and an air compressor 31 of the pressurizing device.
The spherical rotating member 223 can be provided with concave holes 225 as required, as shown in fig. 6-9, a single concave hole 225 can be provided for placing a single glass ball, a single concave hole 225 can be provided for placing a plurality of glass balls, two concave holes 225 symmetrically arranged can be provided for placing a single glass ball, and the arrangement mode of the spherical rotating member 223 and the concave holes 225 is not limited to the 4 modes shown in the figure.
The pulling speed of the crucible pressurizing and adjusting device in work is 3800-4300 m/min, the liquid level height of the molten glass cavity 12 is 210-240 mm, the air pressure is 0.1-0.5 atmosphere, and the number of the holes of the metal bushing plate is 80 meshes.
An adjusting method of a crucible pressurization adjusting device for producing glass fibers specifically comprises the following steps:
s1, starting a ball adding machine 21 of the ball adding device 20, and adding raw material glass balls into the crucible through a ball adding valve 22;
s2, starting an air compressor 31 of the pressurizing device 30, and pressurizing the molten glass cavity 12 through the pressurizing channel 32, wherein the normal working pressure of the molten glass cavity 12 is 0.2 bar; the gas pressure in the pressurizing passage 32 can be monitored by the barometer 35;
s3, observing the liquid level of the glass solution in the molten glass cavity 12 through the liquid observing hole 36, and controlling the quantity of the glass balls added into the ball adding valve 22 by the driving motor 231 to enable the molten glass cavity 12 to be at the initial liquid level;
s4, detecting the liquid level height of the molten glass in the molten glass cavity 12 in real time through the liquid level detector 33; when the liquid level of the glass is reduced to be 1cm lower than the set value, the controller 40 is communicated with the driving motor 231 to accelerate the rotating speed of the gear box 232 and increase the ball inlet amount by 50 percent to maintain the liquid level height of the molten glass cavity 12 to reach the initial liquid level; when the liquid level is stable, the controller 40 is communicated with the driving motor 231 and automatically returns to the original fixed rotating speed of 1-2 r/min;
s5, detecting the liquid level height of the molten glass in the molten glass cavity 12 in real time through the liquid level detector 33; when the liquid level of the glass rises and exceeds a set value by 1cm, the controller 40 is communicated with the air compressor 31 to increase the gas pressure in the molten glass cavity 12 to 1bar at most; the pressure is increased to accelerate the fiber discharge of the glass fiber and reduce the liquid level height of the molten glass cavity 12; when the liquid level is stabilized, the controller 40 drives the air compressor 31 to reduce the gas pressure in the molten glass chamber 12 to 0.2 bar.
The subject of the pressure control of the molten glass chamber 12 is a first order system with a fast response or a second order system with a small constant, which constitutes a closed loop control.
After the pressurizing process is adopted, the quantity of the glass balls melted in unit time is increased, the production energy consumption is correspondingly increased, and the melting rate is too high, so that the melting and the average ratio of the glass balls are not facilitated. For 50-hole metal bushing plates of a crucible for producing thin glass fibers, the daily yield of 3.5 mu m fibers is only 10 kilograms, the daily yield of 5 mu m fibers is only about 30 kilograms, the area melting rate of the crucible for E glass is more suitable for 2000 kilograms per square meter, the area melting rate of C glass components is 2500 kilograms per square meter, and the thin fibers are generally made from E glass components.
The replacement rate is the ratio of the daily flow rate of the crucible to the glass liquid in the crucible, i.e. the number of times the glass in the crucible is replaced per day. The low replacement rate means that the glass solution stays in the crucible for a long time, which is beneficial to clarification of glass, but the replacement rate is too low, the energy consumption for maintaining the molten state of the glass is very large, the rest time is too long, the physicochemical uniformity degree of the molten glass can not be obviously improved, and meanwhile, the long-time contact with a refractory material can generate pollution. The proper replacement rate of the crucible is 4-6 times/day, the replacement rate of the produced fine glass fiber is obviously lower than the value, and the solid glass solution flows too slowly and even stays still at the corner of the crucible. The pressurizing process is adopted, which is beneficial to improving the replacement rate of crucible production.
Because the molten glass determines to produce the fine glass fiber with the diameter of less than 5mm according to the self property of the molten glass, the diameter of each leak hole of the bushing plate must be reduced, the outflow quantity of glass liquid is reduced, the drawing speed is accelerated, and the fine glass fiber is drawn. However, the molten glass is rapidly heated to over 1000 ℃ in a short time to form fine fibers, and the molten glass is more likely to be devitrified than the crude fibers during the liquid/solid interconversion of the bushing, or root fluctuation is caused by temperature change and operation swing to form broken ends, so that the production is stopped. And (4) removing the viscous glass on the bushing plate, re-weighing, and starting the pulling and weighing machine to work. The flow of the glass liquid flowing out of the discharge spout in the platinum-rhodium bushing is in accordance with Poiseup's law, but the diameter of the fiber produced by the conventional pulling and weighing process is 7-20 mu m. For finer fibers, the throughput decreases as the square of the fiber diameter, because of the lower glass flow rate, which means that the residence time of the glass in the tank furnace and crucible increases as the square, and more energy is required for maintaining the glass in a liquid state by heating and holding. The goal of glass fiber manufacture is to be able to consistently increase throughput and to produce fibers of various sizes (diameters). However, the above-mentioned goal is realized on the basis of energy-saving economic benefit, and the inherent contradiction is faced on the process; if the production is to be improved, a large bushing with a larger number of tips and larger openings is selected, which means that more platinum-rhodium alloy is consumed, the thickness and area of the bushing are increased, or the diameter of the tip is widened, and the flow rate of molten glass is increased, but this means that the diameter of glass fibers is increased accordingly. The invention increases the pressure of the liquid level to the bushing plate by pressurizing, generates the same effect as improving the height of the liquid level, does not change the resistance (drawing viscosity, namely the Teluton viscosity) of the glass liquid stream against single axial stretching force during fiber forming, and does not increase the pressure relaxation time during fiber forming.
The working mode and the principle of the crucible pressurizing and adjusting device are as follows:
the liquid level detector 33 detects the liquid level height of the molten glass in the molten glass chamber 12 in real time, when the liquid level of the glass is reduced to be 1cm lower than a set value, the controller 40 is communicated with the driving motor 231 to accelerate the rotating speed of the gear box 232 and increase the ball inlet amount by 50 percent to maintain the liquid level height of the molten glass chamber 12 to reach the initial liquid level, and when the liquid level is stable, the controller 40 is communicated with the driving motor 231 to automatically recover to the original rotating speed of 1-2 r/min; when the liquid level of the glass rises and exceeds a set value by 1cm, the controller 40 is communicated with the air compressor 31 to increase the gas pressure in the molten glass cavity 12 to 1bar at most; the pressure is increased to accelerate the fiber discharge of the glass fiber and reduce the liquid level height of the molten glass cavity 12; when the liquid level is stabilized, the controller 40 drives the air compressor 31 to reduce the gas pressure in the molten glass chamber 12 to 0.2 bar.
Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the details of the embodiments, and various equivalent modifications can be made within the technical spirit of the present invention, and the scope of the present invention is also within the scope of the present invention.
Claims (10)
1. A crucible pressurization adjusting device for producing glass fiber is characterized in that: comprises a ball adding device (20), a pressurizing device (30) and a controller (40) which are arranged on a crucible body (10);
the crucible body (10) comprises a crucible wall (11) and a molten glass cavity (12);
the ball adding device (20) comprises a ball adding machine (21), a ball adding valve (22) and a gear transmission mechanism (23);
the ball adding valve (22) is arranged in the crucible wall (11); the ball adding valve (22) comprises a ball adding pipe (221), a ball adding valve shell (222), a spherical rotating piece (223), an annular convex rib (224), a concave hole (225) and a ball inlet pipe (226);
one end of the ball adding pipe (221) is connected with the ball adding machine (21), and the other end of the ball adding pipe penetrates through the crucible wall (11) and the ball adding valve shell (222) and is connected with the spherical rotating piece (223); the spherical rotating piece (223) is arranged in the ball adding valve shell (222); the annular convex rib (224) is arranged at a gap part between the ball adding valve shell (222) and the spherical rotating piece (223); concave holes (225) for placing glass balls added through the ball adding pipe (221) are distributed on the spherical rotating piece (223); one end of the ball inlet pipe (226) is connected with a spherical rotating piece (223), and the other end of the ball inlet pipe penetrates through the ball adding valve shell (222) and the crucible wall (11) and is communicated with the molten glass cavity (12);
the gear transmission mechanism (23) comprises a driving motor (231), a gear box (232) and a transmission bearing (233);
the driving motor (231) is connected with one end of the gear box (232), and the other end of the gear box (232) is connected with the transmission bearing (233); the transmission bearing (233) penetrates through the crucible wall (11) and the ball adding valve housing (222) and is finally connected with the spherical rotating piece (223);
the pressurizing device (30) comprises an air compressor (31), a pressurizing channel (32) and a liquid level detector (33);
one end of the pressurizing channel (32) is connected with an air compressor (31), and the other end of the pressurizing channel penetrates through the crucible wall (11) and is communicated with the molten glass cavity (12);
the liquid level detector (33) is arranged in the molten glass cavity (12);
one end of the controller (40) is connected with the liquid level detector (33), and the other end of the controller is divided into two paths which are connected with a driving motor (231) of the gear transmission mechanism and an air compressor (31) of the pressurizing device.
2. The pressure regulating device for a crucible for producing glass fiber according to claim 1, wherein: the outer wall of the crucible body (10) and the molten glass cavity (12) are provided with refractory materials.
3. The pressure regulating device for a crucible for producing glass fiber according to claim 1, wherein: ceramic bearings (227) are arranged at the two horizontal end parts of the ball adding valve (22), and the ceramic bearings (227) support the ball adding valve (22) to be fixed in the crucible wall (11).
4. The pressure regulating device for a crucible for producing glass fiber according to claim 1, wherein: the side length of the ball adding valve (22) is 5-10 cm, the diameter of the spherical rotating part (223) is 5-10 cm, and the diameter of the spherical rotating part (223) is smaller than the side length of the ball adding valve (22).
5. The pressure regulating device for a crucible for producing glass fiber according to claim 1, wherein: the outer wall of the ball adding valve shell (222) is provided with a sealing layer and a high-temperature-resistant rubber plastic pad is laid on the sealing layer.
6. The pressure regulating device for a crucible for producing glass fiber according to claim 1, wherein: the spherical rotating member (223) is made of refractory cement concrete.
7. The pressure regulating device for a crucible for producing glass fiber according to claim 1, wherein: an elastic sealant is arranged between the spherical rotating piece (223) and the annular convex rib (224).
8. The pressure regulating device for a crucible for producing glass fiber according to claim 1, wherein: a one-way valve (34) and a barometer (35) for monitoring the gas pressure are arranged in the pressurizing channel (32).
9. The pressure regulating device for a crucible for producing glass fiber according to claim 1, wherein: the pressurizing channel (32) is also provided with a liquid observation hole (36) for observing the molten glass cavity (12).
10. The adjusting method of the crucible pressurization adjusting device for producing glass fiber according to any one of claims 1 to 9, comprising the following steps:
s1, starting a ball adding machine (21) of the ball adding device (20), and adding raw material glass balls into the crucible through a ball adding valve (22);
s2, starting an air compressor (31) of the pressurizing device (30), and pressurizing the molten glass cavity (12) through the pressurizing channel (32), wherein the normal working pressure of the molten glass cavity (12) is 0.2 bar; the pressure of the gas in the pressurizing channel (32) can be monitored by a barometer (35);
s3, observing the liquid level of the glass solution in the molten glass cavity (12) through the liquid observing hole (36), and controlling the quantity of glass balls added into the ball adding valve (22) by the driving motor (231) to enable the molten glass cavity (12) to be at the initial liquid level;
s4, detecting the liquid level height of the molten glass in the molten glass cavity (12) in real time through the liquid level detector (33); when the liquid level of the glass is reduced and is 1cm lower than the set value, the controller (40) is communicated with the driving motor (231) to accelerate the rotating speed of the gear box (232) and increase the ball inlet amount by 50 percent to maintain the liquid level height of the molten glass cavity (12) to reach the initial liquid level; when the liquid level is stable, the controller (40) is communicated with the driving motor (231) and automatically returns to the original rotating speed of 1-2 r/min;
s5, detecting the liquid level height of the molten glass in the molten glass cavity (12) in real time through the liquid level detector (33); when the liquid level of the glass rises and exceeds a set value by 1cm, the controller (40) is communicated with the air compressor (31) to improve the gas pressure in the molten glass cavity (12), and the gas pressure can be raised to 1bar at most; the pressure is increased to accelerate the fiber discharge of the glass fiber and reduce the liquid level height of the molten glass cavity (12); when the liquid level is stabilized, the controller (40) drives the air compressor (31) to reduce the gas pressure in the molten glass chamber (12) to 0.2 bar.
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| CN202111141843.XA CN113880424A (en) | 2021-09-28 | 2021-09-28 | Crucible pressurization adjusting device and method for producing glass fibers |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008266072A (en) * | 2007-04-20 | 2008-11-06 | Nippon Electric Glass Co Ltd | Glass fiber manufacturing apparatus, glass fiber manufacturing method, and glass fiber |
| CN201288137Y (en) * | 2008-10-22 | 2009-08-12 | 中材科技股份有限公司 | Continuous sphere-addition control device for glass fibre crucible pot fiber drawing |
-
2021
- 2021-09-28 CN CN202111141843.XA patent/CN113880424A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008266072A (en) * | 2007-04-20 | 2008-11-06 | Nippon Electric Glass Co Ltd | Glass fiber manufacturing apparatus, glass fiber manufacturing method, and glass fiber |
| CN201288137Y (en) * | 2008-10-22 | 2009-08-12 | 中材科技股份有限公司 | Continuous sphere-addition control device for glass fibre crucible pot fiber drawing |
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