CN113727949A - Glass transfer device - Google Patents
Glass transfer device Download PDFInfo
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- CN113727949A CN113727949A CN202080031255.8A CN202080031255A CN113727949A CN 113727949 A CN113727949 A CN 113727949A CN 202080031255 A CN202080031255 A CN 202080031255A CN 113727949 A CN113727949 A CN 113727949A
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- Prior art keywords
- glass
- cooling
- electrode
- flange
- flange portion
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- 239000011521 glass Substances 0.000 title claims abstract description 84
- 238000001816 cooling Methods 0.000 claims abstract description 121
- 239000006060 molten glass Substances 0.000 claims abstract description 37
- 238000003756 stirring Methods 0.000 claims description 27
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 16
- 239000002826 coolant Substances 0.000 claims description 9
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 8
- 229910052759 nickel Inorganic materials 0.000 claims description 8
- 239000003507 refrigerant Substances 0.000 abstract description 20
- 239000005357 flat glass Substances 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 13
- 238000002844 melting Methods 0.000 description 10
- 230000008018 melting Effects 0.000 description 10
- 230000002093 peripheral effect Effects 0.000 description 10
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 10
- 238000013019 agitation Methods 0.000 description 8
- 238000003466 welding Methods 0.000 description 6
- 238000000137 annealing Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 229910052697 platinum Inorganic materials 0.000 description 5
- 229910001260 Pt alloy Inorganic materials 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005304 joining Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 238000003280 down draw process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000006124 Pilkington process Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 1
- 239000005354 aluminosilicate glass Substances 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000005345 chemically strengthened glass Substances 0.000 description 1
- 239000006059 cover glass Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000007500 overflow downdraw method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000005368 silicate glass Substances 0.000 description 1
- 239000005361 soda-lime glass Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- C03B5/18—Stirring devices; Homogenisation
-
- 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
- C03B5/18—Stirring devices; Homogenisation
- C03B5/182—Stirring devices; Homogenisation by moving the molten glass along fixed elements, e.g. deflectors, weirs, baffle plates
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Melting And Manufacturing (AREA)
Abstract
The glass transfer device is provided with a glass transfer pipe (18) for transferring molten Glass (GM) and cooling channels (22a, 22b) for passing a refrigerant (R) formed by gas. The glass conveying pipe (18) is provided with a tubular main body part (19), a flange part (20), and an electrode part (21). The cooling channels (22a, 22b) are formed inside the flange section (20) and/or inside the electrode section (21).
Description
Technical Field
The present invention relates to a glass transfer device for transferring molten glass.
Background
As is well known, flat panel displays such as liquid crystal displays and organic EL displays use plate glass as a glass substrate and cover glass.
For example, patent document 1 discloses an apparatus for manufacturing a plate glass. The manufacturing device is provided with: a melting tank (melting vessel) serving as a supply source of molten glass; a clarifying tank (clarifying vessel) provided downstream of the melting tank; a stirring tank (mixing container) provided on the downstream side of the clarifying tank; a tank (transport container) provided on the downstream side of the agitation tank; a molded body (molded body) provided on the downstream side of the kettle; and a connection duct connecting these components to each other. The clarifier, the stirring tank, the tank, and the connecting duct are made of, for example, a noble metal such as platinum, and function as a glass transfer device that controls the temperature of the molten glass and transfers the molten glass to the downstream side.
The glass transfer device is provided with: a tubular main body for transferring molten glass; a flange section and an electrode section as a heating device for controlling the temperature of the molten glass; and a cooling duct for cooling the flange portion and the electrode portion. The flange portion and the electrode portion are formed integrally with the main body portion, and the cooling pipe is disposed along the periphery (outer edge) of the flange portion and the electrode portion. The cooling pipe cools the flange portion and the electrode portion when the molten glass is transferred by flowing a coolant such as water. In this case, the thickness of the flange portion and the electrode portion is, for example, about 10 mm.
Documents of the prior art
Patent document
Patent document 1: japanese Kohyo publication (Kohyo publication) No. 2018-513092
Disclosure of Invention
Problems to be solved by the invention
In the conventional glass transfer apparatus, when the flange portion and the electrode portion are water-cooled by the cooling pipe, the flange portion and the electrode portion may be excessively cooled, and power consumption associated with temperature control of the molten glass may increase, resulting in a decrease in energy conversion efficiency. It is also conceivable to use gas as the refrigerant instead of liquid such as water, but since the thermal conductivity of gas is low compared with liquid, there is a possibility that cooling is insufficient and the flange portion or the like is oxidized. Therefore, a cooling structure is required which can appropriately prevent oxidation of the flange portion and the like due to heating even if the refrigerant is a gas.
The present invention has been made in view of the above circumstances, and has a technical object to perform appropriate cooling using a gas as a refrigerant.
Means for solving the problems
The present invention has been made to solve the above-described problems, and provides a glass transfer device including a glass transfer pipe that transfers molten glass, and a cooling channel through which a coolant formed of a gas passes, the glass transfer device being characterized in that the glass transfer pipe includes a flange portion, an electrode portion, and a tubular main body portion, and the cooling channel is formed inside the flange portion and/or inside the electrode portion.
According to this configuration, by passing the coolant through the cooling channel formed inside the flange portion and/or inside the electrode portion, the flange portion and/or the electrode portion can be cooled more uniformly than in the case where the cooling channel (cooling duct) is provided around the flange portion and the electrode portion as in the related art. Further, by forming the cooling channel inside the flange portion and/or inside the electrode portion, the thickness dimension of the flange portion and/or the electrode portion can be increased. This reduces the electrical resistance of the flange portion and/or the electrode portion, improves the rigidity, reduces heat generation, heats the flange portion and/or the electrode portion with good energy conversion efficiency, and prevents deformation of the flange portion and/or the electrode portion. Therefore, even when a gas is used as the refrigerant, the flange portion and/or the electrode portion can be appropriately cooled. Further, by passing the refrigerant through the cooling flow path formed inside the flange portion and/or inside the electrode portion, the entire transfer device can be downsized, and the space required for installing the transfer device can be reduced.
The cooling channel may be formed inside the flange portion and inside the electrode portion. This enables both the flange portion and the electrode portion to be efficiently cooled.
The cooling channel may include a plurality of flange cooling portions that cool the flange portion, the plurality of flange cooling portions extending in a circumferential direction of the flange portion and being formed at intervals in a radial direction of the flange portion. By forming the plurality of flange cooling portions in the flange portion in this manner, cooling can be performed uniformly over the entire range of the flange portion.
The electrode portion may have a predetermined width, and the cooling flow path may include a plurality of electrode cooling portions that cool the electrode portion, and the plurality of electrode cooling portions may be formed at intervals in a width direction of the electrode portion. By forming the plurality of electrode cooling portions inside the electrode portion in this manner, the electrode portion can be cooled uniformly over the entire range.
The glass conveying pipe may be a stirring tank for stirring the molten glass. The glass conveying pipe of the stirring tank extending in the vertical direction is difficult to secure a space necessary for installation in the lower flange portion and the electrode portion. Therefore, when the present invention is applied to a glass conveying pipe of a stirring tank, the effect of reducing the space required for installation of the conveying device described above becomes remarkable.
The flange portion and the electrode portion may be made of nickel or a nickel alloy having excellent heat resistance. Since nickel or a nickel alloy is easily oxidized, the aforementioned effect of appropriately cooling the flange portion and/or the electrode portion becomes remarkable.
Effects of the invention
According to the present invention, gas can be used as a refrigerant and appropriate cooling can be performed.
Drawings
Fig. 1 is a side view showing the overall structure of the glass manufacturing apparatus.
Fig. 2 is a perspective view of the agitation tank.
Fig. 3 is a sectional view showing a main part of the agitation tank.
Fig. 4 is a sectional view showing a method of manufacturing a flange portion of an agitation tank.
Fig. 5 is a sectional view showing a method of manufacturing a flange portion of an agitation tank.
FIG. 6 is a perspective view showing an end of a glass conveying pipe of the glass supply path.
Fig. 7 is a sectional view showing a main portion of the glass conveying pipe.
FIG. 8 is a sectional view showing a method of manufacturing a flange portion of a glass conveying pipe.
FIG. 9 is a sectional view showing a method of manufacturing a flange portion of a glass conveying pipe.
Detailed Description
Embodiments of the present invention will be described below with reference to the drawings.
Fig. 1 shows a glass article manufacturing apparatus. The manufacturing apparatus comprises, in order from the upstream side, a melting tank 1, a clarifying tank 2, a stirring tank (stirring vessel) 3, a vessel 4, a molding 5, and glass supply lines 6a to 6d connecting these components 1 to 5. The manufacturing apparatus includes an annealing furnace (not shown) that anneals the sheet glass GR (glass article) molded by the molding body 5, and a cutting device (not shown) that cuts the sheet glass GR after the annealing.
The melting vessel 1 is a vessel for performing a melting step of melting the charged glass raw material to obtain molten glass GM. The melting vessel 1 is connected to the clarifying vessel 2 through a glass supply channel 6 a.
The clarifying tank 2 is a container for performing a clarifying step of transferring the molten glass GM and defoaming the molten glass GM by a clarifier or the like. The clarifier 2 is connected to the stirring tank 3 through a glass supply path 6 b.
The stirring tank 3 is a bottomed tubular container for performing a step (homogenizing step) of stirring and homogenizing the clarified molten glass GM. The agitation tank 3 includes an agitator 3a having an agitation blade. The stirring tank 3 is connected to the tank 4 through a glass supply channel 6 c. The stirring tank 3 functions as a glass transfer device (glass transfer pipe) that stirs and transfers the molten glass GM.
As shown in fig. 2 and 3, the stirring tank 3 includes a main body portion 7, a flange portion 8 provided on an outer peripheral portion (outer peripheral surface) of the main body portion 7, an electrode portion 9 functioning as a heating device together with the flange portion 8, and cooling channels 10a and 10b for cooling the flange portion 8 and the electrode portion 9.
The body portion 7 is formed in a tubular shape (for example, a circular tubular shape) from platinum or a platinum alloy. The body portion 7 is disposed along the vertical direction, and glass supply paths 6b and 6c are connected to a midway portion thereof. Glass supply channel 6b connecting clarifier 2 to main body 7 is located above glass supply channel 6c connecting kettle 4 to main body 7. With this configuration, the body portion 7 transfers the molten glass GM supplied from the upstream glass supply path 6b downward and supplies the molten glass GM to the downstream glass supply path 6 c.
The flange portion 8 is formed in a disc shape so as to surround the entire circumference of the body portion 7. The flange portion 8 is integrally formed (welded) with the main body portion 7 so as to be concentric with the main body portion 7. In the present embodiment, the flange portion 8 is provided at the end portion in the longitudinal direction of the body portion 7, but may be provided at an intermediate portion of the body portion 7.
The flange portion 8 includes a first flange portion 8a and a second flange portion 8b integrally fixed to an outer periphery of the first flange portion 8 a.
The first flange portion 8a is made of platinum or a platinum alloy. The first flange portion 8a is integrally formed with each end of the body portion 7. The second flange portion 8b is formed of nickel or a nickel alloy in an annular shape (for example, an annular shape). The second flange portion 8b is integrally formed with the first flange portion 8a by welding an inner peripheral portion thereof to an outer peripheral portion of the first flange portion 8 a.
The electrode portion 9 is formed in a plate shape from nickel or a nickel alloy. The electrode portion 9 is an elongated portion having a predetermined width and protruding outward in the radial direction from the outer peripheral portion of the second flange portion 8 b. A power supply not shown is connected to the electrode portion 9.
As shown in fig. 3, the cooling channels 10a and 10b include a first cooling channel 10a and a second cooling channel 10 b. The number of cooling channels 10a and 10b is not limited to the present embodiment, and can be set as appropriate according to the size of the flange 8 and the electrode portion 9. Each of the cooling channels 10a and 10b is configured by arranging a cooling pipe 11 for transferring a refrigerant R made of a gas such as air inside the flange portion 8 and the electrode portion 9. The cooling pipe 11 is made of nickel or a nickel alloy.
Each of the cooling channels 10a and 10b has a flange cooling portion 12 for cooling the flange portion 8 and an electrode cooling portion 13 for cooling the electrode portion 9. The flange cooling portion 12 is formed inside the second flange portion 8b, and the electrode cooling portion 13 is formed inside the electrode portion 9. The flange cooling portion 12 is an arc-shaped flow path extending in the circumferential direction of the flange portion 8 and arranged in parallel with an interval in the radial direction of the flange portion 8. The electrode cooling unit 13 is a plurality of linear flow paths along the longitudinal direction of the electrode portion 9, and is disposed at predetermined intervals in the width direction (direction orthogonal to the longitudinal direction) of the electrode portion 9.
As shown in fig. 4 and 5, the second flange portion 8b is formed by joining a first component member 14 and a second component member 15, which are annular and plate-like, by welding. Grooves 16 and 17 having an arc shape in cross section are formed on one surface of the first component 14 and one surface of the second component 15. As shown in fig. 5, the cooling passages 10a and 10b are formed in the second flange portion 8b, and the first component member 14 and the second component member 15 are stacked so that the cooling pipe 11 is interposed between the groove portion 16 of the first component member 14 and the groove portion 17 of the second component member 15. Thereafter, the first component member 14 and the second component member 15 are integrated by welding portions that are in contact with each other. Thereby, the second flange 8b is formed in which the cooling passages 10a and 10b by the cooling pipe 11 are formed.
The vessel 4 is a vessel for performing a state adjustment step of adjusting the molten glass GM to a state suitable for molding. The vessel 4 is exemplified as a volume part for adjusting the viscosity and flow rate of the molten glass GM. The pot 4 is connected to the molded body 5 through a glass supply passage 6 d.
The molded body 5 is formed by an overflow downdraw method to form the molten glass GM into a sheet shape. Specifically, the cross-sectional shape of the forming body 5 (cross-sectional shape perpendicular to the paper surface of fig. 1) is substantially wedge-shaped, and an overflow groove (not shown) is formed in an upper portion of the forming body 5.
The forming body 5 causes the molten glass GM to overflow from the overflow vessel and flow down along the side wall surfaces on both sides of the forming body 5 (side surfaces on the front and back sides of the paper surface). The forming body 5 fuses the molten glass GM flowing down to the lower top of the sidewall surface. Thereby, the band-shaped sheet glass GR is formed. The strip-shaped sheet glass GR is cut by the cutting device after passing through the annealing furnace, and becomes a sheet glass of a desired size.
The plate glass thus obtained has a thickness of, for example, 0.01 to 10mm and is used for flat panel displays such as liquid crystal displays and organic EL displays, substrates for organic EL illuminations and solar cells, and protective covers. The molded body 5 may be a member that performs another down-draw method such as a slit down-draw method, or a molding device using a float method may be provided instead of the molded body 5. The glass article manufactured by the manufacturing apparatus is not limited to the sheet glass GR, but includes glass tubes and other articles having various shapes. For example, when a glass tube is formed, a molding apparatus using the danner method is provided instead of the molded body 5.
As the composition of the plate glass, silicate glass and silica glass are used, borosilicate glass, soda-lime glass, aluminosilicate glass and chemically strengthened glass are preferably used, and alkali-free glass is most preferably used. Here, the alkali-free glass means glass substantially free of alkali components (alkali metal oxides), specifically, glass having an alkali component weight ratio of 3000ppm or less. The weight ratio of the alkali component is preferably 1000ppm or less, more preferably 500ppm or less, and most preferably 300ppm or less.
The glass supply paths 6a to 6d function as glass transfer devices for transferring the molten glass GM. The glass supply paths 6a to 6d include a glass conveying pipe 18 (see fig. 6) provided with a heating device and a cooling device. The glass supply paths 6a to 6d are constituted by one glass conveyance pipe 18, or are constituted by connecting a plurality of glass conveyance pipes 18. The glass conveying pipe 18 is entirely covered with a heat insulator such as a brick, not shown.
As shown in fig. 6 and 7, the glass conveying pipe 18 includes a main body portion 19, a flange portion 20 provided on an outer peripheral portion (outer peripheral surface) of the main body portion 19, an electrode portion 21 functioning as a heating device together with the flange portion 20, and cooling channels 22a and 22b for cooling the flange portion 20 and the electrode portion 21.
The body portion 19 is formed in a tubular shape (for example, a circular tubular shape) from platinum or a platinum alloy. The body 19 conveys the molten glass GM from one end side (upstream side) to the other end side (downstream side) by passing the molten glass GM through the inside.
The flange portion 20 is formed in a disc shape so as to surround the entire circumference of the main body portion 19. The flange portion 20 is formed integrally with the main body portion 19 (welded) so as to be concentric with the main body portion 19. In the present embodiment, the flange portion 20 is provided at the end portion in the longitudinal direction of the body portion 19, but may be provided at an intermediate portion of the body portion 19.
The flange portion 20 includes a first flange portion 20a and a second flange portion 20b integrally fixed to an outer periphery of the first flange portion 20 a.
The first flange portion 20a is made of platinum or a platinum alloy. The first flange portion 20a is integrally formed with each end of the body portion 19. The second flange portion 20b is formed of nickel or a nickel alloy in an annular shape (for example, an annular shape). The second flange portion 20b is integrally formed with the first flange portion 20a by joining an inner peripheral portion thereof to an outer peripheral portion of the first flange portion 20a by welding.
The electrode portion 21 is formed in a plate shape from nickel or a nickel alloy. The electrode portion 21 is an elongated portion having a predetermined width and protruding outward (upward) in the radial direction from the upper portion of the flange portion 20 (second flange portion 20 b). A power supply not shown is connected to the electrode portion 21. The electrode portion 21 may be provided at the lower portion or the side portion of the flange portion 20 (second flange portion 20 b).
As shown in fig. 7, the cooling channels 22a and 22b include a first cooling channel 22a and a second cooling channel 22 b. The number of cooling channels 22a and 22b is not limited to the present embodiment, and can be set as appropriate according to the dimensions of the flange portion 20 and the electrode portion 21.
The first cooling channel 22a and the second cooling channel 22b have a flange cooling portion 23 that cools the flange portion 20 and an electrode cooling portion 24 that cools the electrode portion 21. The flange cooling portion 23 is formed inside the second flange portion 20b, and the electrode cooling portion 24 is formed inside the electrode portion 21. The flange cooling portion 23 is an arc-shaped flow path extending in the circumferential direction of the flange portion 20 and arranged in parallel with an interval in the radial direction of the flange portion 20. The electrode cooling unit 13 is a plurality of linear flow paths along the longitudinal direction of the electrode portion 21, and is disposed at predetermined intervals in the width direction (direction orthogonal to the longitudinal direction) of the electrode portion 21.
Each of the cooling channels 22a and 22b includes an inlet 25 and an outlet 26 for the refrigerant R. A cooling pipe 27 for transferring the refrigerant R is connected to the inlet 25 and the outlet 26. The inlet 25 and the outlet 26 of each cooling channel 22a, 22b are provided at the end of the electrode portion 21. In the present embodiment, the cooling pipe 27 is connected to the outlet 26, but the cooling pipe 27 may not be connected to the outlet 26, and the refrigerant R may be discharged from the outlet 26. The flange cooling portion 23 may be divided (for example, divided into two to four portions) in the circumferential direction of the flange portion 20, and the refrigerant R may be caused to flow through each of the divided flange cooling portions 23. In this case, the inlet 25 and the outlet 26 of each flange cooling portion 23 are formed in the peripheral edge portion of the flange portion 20. In the present embodiment, the flow direction of the refrigerant R in the cooling passage 22a and the flow direction of the refrigerant R in the cooling passage 22b are opposed to each other, but the flow direction of the refrigerant R in the cooling passage 22a and the flow direction of the refrigerant R in the cooling passage 22b may be parallel to each other. These structures can be applied to the flange portion 8 of the stirring tank 3 described above.
As shown in fig. 8 and 9, the second flange portion 20b is formed by joining a first annular plate-shaped component 28 and a second annular plate-shaped component 29 by welding. Grooves 30 and 31 having a rectangular cross-sectional shape and constituting the cooling passages 22a and 22b are formed in one surface of the first component 28 and one surface of the second component 29. As shown in fig. 9, when the first component 28 and the second component 29 are brought into contact with each other on one surface, the groove portion 30 of the first component 28 is aligned with the groove portion 31 of the second component 29. In this state, the first component 28 and the second component 29 are integrated by welding the portions in contact with each other. Thus, the groove portion 30 of the first component 28 and the groove portion 31 of the second component 29 are integrated to form the cooling passages 22a and 22b having a square shape (for example, a square shape) in cross section. The cooling passages 22a and 22b are not limited to this example, and may be configured by interposing the cooling pipe 27 between the grooves 30 and 31, similarly to the cooling passages 10a and 10b of the second flange portion 8b of the stirring tank 3.
Hereinafter, a method for manufacturing a plate glass will be described using the manufacturing apparatus having the above-described configuration. In the method, a raw material glass is melted in a melting tank 1 (melting step), and after a molten glass GM is obtained, a fining step in a fining vessel 2, a homogenizing step in a stirring vessel 3, and a state adjustment step in a vessel 4 are sequentially performed on the molten glass GM. Thereafter, the molten glass GM is transferred to the forming body 5, and the sheet glass GR is formed from the molten glass GM by the forming step. Thereafter, the sheet glass GR is formed into a predetermined size through an annealing process by an annealing furnace and a cutting process by a cutting device.
In the homogenizing step, the stirring tank 3 rotates the stirrer 3a while transferring the molten glass GM by the body 7. In this case, the stirring tank 3 heats the body portion 7 by applying a voltage to the electrode portion 9 in order to control the temperature of the molten glass GM. At the same time, the coolant R is supplied to the cooling channels 10a and 10 b. The coolant R passes through the cooling pipe 11, and cools the flange 8 and the electrode portion 9. In the present embodiment, the coolant R flows through the electrode cooling portion 13 and the flange cooling portion 12 of the cooling channels 10a and 10b in this order. The present invention is not limited to this, and the flange cooling portion 12 and the electrode cooling portion 13 may be independent of each other without being connected to each other. In order to prevent the configuration from becoming complicated and to reliably cool the flange 8 and the electrode portion 9, it is preferable that the coolant R flows through the electrode cooling portion 13 and the flange cooling portion 12 of the cooling channels 10a and 10b in this order, as in the present embodiment.
When the molten glass GM is transferred through the glass supply lines 6a to 6d, a voltage is applied to the electrode unit 21 to heat the body unit 19 so as to control the temperature of the molten glass GM flowing through the body unit 19 of the glass transfer pipe 18. In this case, the coolant R is supplied to the cooling passages 22a and 22 b. The cooling channels 22a and 22b cool the flange portion 20 and the electrode portion 21 by allowing the refrigerant R supplied from the cooling pipe 27 to flow from the inlet 25 to the outlet 26.
According to the glass transfer device (stirring tank 3, glass supply paths 6a to 6d) of the present embodiment described above, by passing the refrigerant R through the cooling channels 10a, 10b, 22a, and 22b formed in the flange portions 8 and 20 and the electrode portions 9 and 21, the flange portions 8 and 20 and the electrode portions 9 and 21 can be uniformly cooled from the inside, as compared with a case where cooling pipes are arranged around the flange portions and the electrode portions as in the conventional glass transfer device. Therefore, even when a gas is used as the refrigerant R, the energy conversion efficiency is not reduced by excessive cooling of the flange portions 8 and 20 and the electrode portions 9 and 21, and appropriate cooling can be achieved.
The present invention is not limited to the configurations of the above embodiments, and is not limited to the above-described operational effects. The present invention can be variously modified within a scope not departing from the gist of the present invention.
In the above-described embodiment, the present invention is applied to the stirring tank 3 and the glass transport pipe 18 included in the glass supply paths 6a to 6d, but the present invention is not limited to this configuration. The structure of the cooling channels 10a and 10b of the stirring tank 3 according to the above embodiment may be applied to the glass conveying pipes constituting the clarifying tank 2, the tank 4, and the glass supply channels 6a to 6 d. The configuration of the cooling channels 22a and 22b of the glass transport pipe 18 of the glass supply channels 6a to 6d of the above embodiment may be applied to the glass transport pipes constituting the clarifier 2, the stirring tank 3, and the tank 4.
The glass supply paths 6a to 6d and the clarifier 2 can be configured to have a desired length by connecting a plurality of glass conveyance pipes 18. In this case, the glass conveying pipes 18 can be connected with the flange portions 20 of the adjacent glass conveying pipes 18 facing each other with an insulating member or the like interposed between the flange portions 20. The flange portion 20 has a larger thickness than a conventional flange portion by forming the cooling passages 22a and 22b therein, and thus has improved rigidity. Therefore, when a plurality of glass conveying pipes 18 are connected, the connection operation can be easily performed while preventing deformation of the flange portion 20. The thickness of the flange portion 20 is preferably 20 to 50mm, and more preferably 30 to 50mm, for example.
In the above-described embodiment, the cooling channels 10a and 10b of the stirring tank 3 and the cooling channels 22a and 22b of the glass transport pipe 18 of the glass supply channels 6a to 6d are configured to cool both the flange portions 8 and 20 and the electrode portions 9 and 21, but the present invention is not limited to this configuration. Each of the cooling channels 10a, 10b, 22a, and 22b may cool only the flanges 8 and 20, or may cool only the electrodes 9 and 21.
Description of the reference numerals
3 agitation tank
7 main body part
8 flange part
9 electrode part
10a first cooling flow path
10b second cooling channel
18 glass transport pipe
19 main body part
20 flange part
21 electrode part
22a first cooling flow path
22b second cooling channel
R refrigerant
GM molten glass.
Claims (6)
1. A glass transfer device comprising a glass transfer pipe for transferring molten glass and a cooling channel for passing a coolant formed of a gas,
the glass transport pipe comprises a flange portion, an electrode portion and a tubular body portion,
the cooling channel is formed inside the flange portion and/or inside the electrode portion.
2. The glass transfer device of claim 1,
the cooling channel is formed inside the flange portion and inside the electrode portion.
3. The glass transfer device of claim 2,
the cooling channel is provided with a plurality of flange cooling parts for cooling the flange part,
the plurality of flange cooling portions extend in a circumferential direction of the flange portion, and are formed at intervals in a radial direction of the flange portion.
4. The glass transfer device according to claim 2 or 3,
the electrode portion has a predetermined width and is provided with a plurality of electrode portions,
the cooling flow path includes a plurality of electrode cooling units for cooling the electrode unit,
the plurality of electrode cooling portions are formed at intervals in the width direction of the electrode portion.
5. The glass transfer device of any of claims 1-4,
the glass transport pipe is a stirring tank for stirring the molten glass.
6. The glass transfer device of any of claims 1-4,
the flange portion and the electrode portion are made of nickel or a nickel alloy.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019112092A JP7223329B2 (en) | 2019-06-17 | 2019-06-17 | GLASS TRANSFER DEVICE AND GLASS PRODUCT MANUFACTURING METHOD |
| JP2019-112092 | 2019-06-17 | ||
| PCT/JP2020/020411 WO2020255633A1 (en) | 2019-06-17 | 2020-05-22 | Glass transfer device |
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| Publication Number | Publication Date |
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| CN113727949A true CN113727949A (en) | 2021-11-30 |
| CN113727949B CN113727949B (en) | 2023-12-08 |
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| CN202080031255.8A Active CN113727949B (en) | 2019-06-17 | 2020-05-22 | Glass transfer device |
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| JP (1) | JP7223329B2 (en) |
| KR (1) | KR20220021921A (en) |
| CN (1) | CN113727949B (en) |
| WO (1) | WO2020255633A1 (en) |
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| JP2023053650A (en) | 2021-10-01 | 2023-04-13 | 日本電気硝子株式会社 | Apparatus and method for manufacturing glass article |
| JP2023084387A (en) * | 2021-12-07 | 2023-06-19 | 日本電気硝子株式会社 | Glass transfer device, device for manufacturing glass article and method for manufacturing glass article |
| WO2023234083A1 (en) * | 2022-06-03 | 2023-12-07 | 日本電気硝子株式会社 | Glass article manufacturing apparatus and glass article manufacturing method |
| WO2024076515A1 (en) * | 2022-10-04 | 2024-04-11 | Corning Incorporated | Apparatus and method for cooling molten glass in a conduit |
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| CN102190418A (en) * | 2010-02-25 | 2011-09-21 | 康宁股份有限公司 | Apparatus for use in direct resistance heating of platinum-containing vessels |
| CN106103363A (en) * | 2014-03-13 | 2016-11-09 | 日本电气硝子株式会社 | The manufacture device of glass article |
| JP2018083739A (en) * | 2016-11-25 | 2018-05-31 | 日本電気硝子株式会社 | Heating apparatus and glass supply pipe |
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| CN109311717A (en) * | 2016-10-31 | 2019-02-05 | 日本电气硝子株式会社 | Glass manufacturing apparatus, glass-making processes, glass supply pipe and melten glass method for carrying |
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| US8269131B2 (en) | 2008-02-28 | 2012-09-18 | Corning Incorporated | Nickel-containing flanges for use in direct resistance heating of platinum-containing vessels |
| US8857219B2 (en) | 2012-07-11 | 2014-10-14 | Corning Incorporated | Apparatus for use in direct resistance heating of platinum-containing vessels |
| WO2014119709A1 (en) | 2013-02-01 | 2014-08-07 | ＡｖａｎＳｔｒａｔｅ株式会社 | Method for manufacturing glass substrate and glass substrate manufacturing apparatus |
| EP3274304B1 (en) | 2015-03-23 | 2021-05-05 | Corning Incorporated | Apparatus and method for heating a metallic vessel |
| JP2018172225A (en) | 2017-03-31 | 2018-11-08 | ＡｖａｎＳｔｒａｔｅ株式会社 | Device for manufacturing glass substrate and method for manufacturing glass substrate |
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- 2019-06-17 JP JP2019112092A patent/JP7223329B2/en active Active
-
2020
- 2020-05-22 KR KR1020217038567A patent/KR20220021921A/en not_active Application Discontinuation
- 2020-05-22 CN CN202080031255.8A patent/CN113727949B/en active Active
- 2020-05-22 WO PCT/JP2020/020411 patent/WO2020255633A1/en active Application Filing
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| Publication number | Publication date |
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| JP7223329B2 (en) | 2023-02-16 |
| KR20220021921A (en) | 2022-02-22 |
| JP2020203810A (en) | 2020-12-24 |
| CN113727949B (en) | 2023-12-08 |
| WO2020255633A1 (en) | 2020-12-24 |
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