CN219032002U - Adjustable temperature overflow launder - Google Patents
Adjustable temperature overflow launder Download PDFInfo
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- CN219032002U CN219032002U CN202223319543.9U CN202223319543U CN219032002U CN 219032002 U CN219032002 U CN 219032002U CN 202223319543 U CN202223319543 U CN 202223319543U CN 219032002 U CN219032002 U CN 219032002U
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Abstract
The utility model discloses a temperature-adjustable overflow trough, which belongs to the technical field of planar glass production, wherein a plurality of heaters are respectively arranged from top to bottom on two sides of an overflow trough body, a heat exchange part is also arranged above the top of the overflow trough body, the viscosity of glass liquid can be ensured to rise according to a preset curve through the heaters on the two sides, the temperature of the lower part of the overflow trough body can be ensured due to the fact that the power of the heater on the lower part of the overflow trough body needs to be increased, the heat exchange part is adopted to perform heat exchange on the upper part of the overflow trough body, the adverse effect of a chimney effect on the temperature (viscosity) of the glass liquid on the upper part of the overflow trough is weakened and eliminated, and the glass liquid temperature of the upper part and the lower part of the overflow trough body is well controlled, so that high-efficiency, stable and excellent overflow quality is achieved; the utility model has simple structure, convenient disassembly and assembly, convenient operation and maintenance, high cost performance and important practical application value.
Description
Technical Field
The utility model belongs to the technical field of planar glass production, and particularly relates to a temperature-adjustable overflow trough.
Background
With the massive use of devices with various flat panel display functions such as notebook computers and smart phones, market demands for flat substrate glass for manufacturing flat panel displays have increased greatly. Meanwhile, due to the use of large-size flat panel displays, higher and higher requirements are put on parameters such as the size, flatness, internal stress and the like of the planar substrate glass. The overflow downdraw process takes up a significant role in the production of planar substrate glass. As an important component of a flat panel display device, the remaining components are attached to a flat glass, so that this flat glass is also called a substrate glass in the production of the flat panel display device. With the increasing size of flat panel display devices, the requirements for flatness and internal stress of flat glass in production and use are also increasing. In the process of producing flat panel display devices, three important quality parameters required for substrate glass are: surface finish, flatness, and internal stress.
The overflow downdraw method finds great application in the production of planar substrate glass. In the production process of the overflow downdraw method, molten glass is drained into an overflow groove after being treated, and flows downwards along the wedge-shaped outer surface of the overflow groove after passing through weirs on two sides of the overflow groove, merges at the bottom, flows downwards and stretches downwards to obtain planar substrate glass. Since the glass parts that contact the isopipe surfaces are buried inside the glass sheet during this process, the outer surfaces of the glass sheet are not exposed to any other substances except air. Thus, the planar substrate glass produced by adopting the overflow downdraw method can obtain the planar substrate glass with good outer surface quality due to the inherent principle. In the production process of the overflow down-draw method, the overflow quality is controlled seriously, and the quality of the substrate glass can be ensured only by the good overflow quality. Due to the overflow quality requirement, the viscosity of the glass liquid at the bottom of the overflow trough is gradually increased from the top of the overflow trough to the bottom, and the temperature is gradually reduced. So that the temperature of the glass liquid at the top of the overflow trough is higher and the temperature of the glass liquid at the bottom of the overflow trough is lower.
However, in the conventional isopipe, it is difficult to ensure that the viscosity of the molten glass increases according to a predetermined curve due to the influence of the chimney effect (hot air increases), that is, the temperature of the molten glass decreases according to a predetermined curve, and thus the temperature of the upper isopipe is affected, which makes it difficult to adjust the process.
Therefore, in the prior art, the temperature of the glass liquid is difficult to be reduced according to a preset curve, the temperature of the glass liquid at the upper part of the overflow groove is more difficult to be ensured, the process adjustment is difficult, the overflow quality of the glass liquid is not well controlled, and the quality of the substrate glass is greatly influenced.
Disclosure of Invention
In order to solve the technical problems, the utility model provides the temperature-adjustable overflow trough, which can enable the temperature of glass liquid to be reduced according to a preset curve, can ensure the temperature of the glass liquid at the upper part of the overflow trough, is convenient for process adjustment, can well control the overflow quality of the glass liquid, and further ensures the quality of substrate glass.
In order to achieve the above purpose, the present utility model adopts the following technical contents:
an overflow trough with adjustable temperature comprises an overflow trough body;
the left side and the right side of the overflow trough body are respectively provided with a plurality of heaters, and the heaters on each side are sequentially distributed from top to bottom;
and a heat exchange component is arranged above the top of the overflow trough body.
Further, the heat exchange components are integrally distributed and cover the top of the overflow trough body.
Further, the length of the heat exchange component is greater than the length of the isopipe body, and the width of the heat exchange component is greater than the width of the isopipe body.
Further, the difference in length between the heat exchange component and the isopipe body is less than or equal to 200mm; the difference between the widths of the heat exchange component and the overflow trough body is less than or equal to 200mm.
Further, the heat exchange components are distributed in a blocking mode and cover the top of the overflow trough body.
Further, the heat exchange components are symmetrically arranged at the left side and the right side of the axis of the overflow groove body, and the number of the single-side partitions is less than or equal to 5.
Further, the heat exchange components are distributed in the axial direction of the overflow trough body, and the number of the blocks is less than or equal to 9.
Further, the heat exchange component is spaced from the top of the isopipe body by a distance of 50 to 350mm.
Further, the heat exchange component is a cooling coil.
Further, the bottom of the overflow trough body is of a wedge-shaped structure.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model provides a temperature-adjustable overflow trough, wherein a plurality of heaters are respectively arranged at two sides of an overflow trough body from top to bottom, a heat exchange part is also arranged above the top of the overflow trough body, and the viscosity of glass liquid can be ensured to rise according to a preset curve through the heaters at the two sides, namely the temperature of the glass liquid is reduced according to the preset curve; the heater at the lower part of the overflow tank body needs to increase power to ensure the temperature of the lower part, so that the influence of the chimney effect on the temperature (viscosity) of the glass liquid at the upper part of the overflow tank is further increased, at the moment, the upper part of the overflow tank body can be subjected to heat exchange by adopting a heat exchange part, the adverse influence of the chimney effect on the temperature (viscosity) of the glass liquid at the upper part of the overflow tank is weakened and eliminated, and the glass liquid temperature at the upper part and the lower part of the overflow tank body is well controlled, so that the high-efficiency, stable and excellent overflow quality is achieved; the utility model has simple structure, convenient disassembly and assembly, convenient operation and maintenance, high cost performance and higher popularization and application value.
Preferably, the exchange components of the utility model are integrally distributed and cover the top of the overflow trough body, so that the whole coverage can ensure the better heat dissipation requirement of the device.
Still preferably, the length of the heat exchange component is larger than the length of the overflow trough body, the width of the heat exchange component is larger than the width of the overflow trough body, and the difference between the lengths of the heat exchange component and the overflow trough body is smaller than or equal to 200mm; the width difference between the heat exchange component and the overflow groove body is smaller than or equal to 200mm, namely, the single side of the heat exchange component exceeds the boundary length of the single side of the overflow groove by not more than 200mm, on one hand, due to the consideration of the heat dissipation effect, on the other hand, due to the consideration of the structural simplicity and the economic effect, a certain coverage range is set, and meanwhile, the good heat dissipation effect and the high cost performance of the device are both considered.
Preferably, the exchange components of the utility model are distributed in a blocking manner, so that the temperature in a local range above the top of the overflow trough body can be accurately regulated to meet the requirements of various working conditions.
Preferably, the distance between the exchange component and the top of the overflow trough body is controlled to be between 50 and 350mm, so that the heat dissipation effect is not caused by the too far distance between the exchange component and the overflow trough body; and too strong heat dissipation caused by too close distance can be avoided, adverse effects on the manufacturing process are caused, and good heat dissipation effect can be ensured.
Preferably, the heat exchange component of the utility model adopts a cooling coil, thereby better ensuring the heat exchange efficiency.
Preferably, the bottom of the overflow launder body is designed into a wedge-shaped structure, so that the overflow downdraw process is convenient to implement, and the production quality of the substrate glass is ensured.
Drawings
FIG. 1 is a schematic diagram of a structure in which an overflow launder body is connected with a heater in an overflow launder with adjustable temperature according to an embodiment of the utility model;
FIG. 2 is a schematic diagram of a temperature-adjustable overflow trough according to an embodiment of the utility model;
reference numerals:
1-overflow tank body, 2-heater, 3-heat exchange component.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the following specific embodiments are used for further describing the utility model in detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
The utility model provides a temperature-adjustable overflow trough, which comprises an overflow trough body 1; the left side and the right side of the overflow trough body 1 are respectively provided with a plurality of heaters 2, and the heaters 2 on each side are sequentially distributed from top to bottom; the top of overflow launder body 1 is provided with heat exchange element 3, heat exchange element 3 with the top distance of overflow launder body 1 is 50-350 mm, heat exchange element 3 adopts cooling coil.
In particular, the heat exchange element 3 is distributed over the top of the isopipe body 1 in two ways: first, the heat exchange component 3 is integrally distributed and covers the top of the overflow tank body 1.
The length of the heat exchange part 3 is larger than the length of the overflow trough body 1, and the width of the heat exchange part 3 is larger than the width of the overflow trough body 1. The difference between the length of the heat exchange part 3 and the length of the overflow trough body 1 is less than or equal to 200mm; the difference between the widths of the heat exchange part 3 and the overflow groove body 1 is smaller than or equal to 200mm, so that the heat conduction area of the heat exchange part 3 to the upper part of the top of the overflow groove body 1 is ensured.
The second distribution mode is as follows: (1) a double sided arrangement: the heat exchange parts 3 are distributed in a blocking mode and cover the top of the overflow trough body 1. The heat exchange parts 3 are symmetrically arranged at the left side and the right side of the axis of the overflow groove body 1, and the number of the single-side blocks is less than or equal to 5.
(2) Adopts a single-row arrangement: the heat exchange components 3 are distributed on the axial direction of the overflow tank body 1, and the number of the blocks is less than or equal to 9.
The bottom of the overflow trough body 1 is of a wedge-shaped structure.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the embodiments of the present utility model, it should be noted that, if the terms "upper," "lower," "horizontal," "inner," and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the term "horizontal" if present does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
The utility model is described in further detail below with reference to the attached drawing figures:
examples
In the embodiment, in order to ensure that the viscosity of the glass liquid rises according to a predetermined curve, that is, in order to ensure that the temperature of the glass liquid drops according to the predetermined curve, a plurality of heaters 2 are respectively arranged on two sides of an overflow tank body 1 from top to bottom, the heaters 2 on two sides are symmetrically arranged, the glass liquid flowing out of the overflow tank body 1 flows downwards along the outer surfaces of the two sides of the overflow tank, merges at the bottom, flows downwards and stretches downwards, and the requirement that the temperature of the glass liquid drops according to the predetermined curve is met, so that the planar substrate glass is obtained; but since the bottom of the isopipe body 1 (also called its lower part) is of a wedge-shaped structure; in order to ensure the temperature of the lower part, the power of the lower heater is used greatly, the influence of the chimney effect on the temperature (viscosity) of the glass liquid at the upper part of the overflow groove is increased, so that the temperature of the glass liquid at the upper part is overhigh, and in order to ensure the temperature of the glass liquid at the upper part, as shown in fig. 2, a heat exchange part is added above the top of the overflow groove body 1, the temperature of the upper part overflow groove body 1 is not influenced while the power of the lower heater is increased, and the adverse influence of the chimney effect on the temperature (viscosity) of the glass liquid at the upper part of the overflow groove body is weakened and eliminated.
The heat exchange part 3 adopts a pre-buried cooling coil pipe and an integrally packaged type. The heat exchange member 3 may be either integral or split (block arrangement). The heat exchange part 3 is of a symmetrical structure in the width direction of the overflow tank body 1, and the number of the blocks is more than or equal to 5 and more than or equal to 1. The number of the heat exchange parts 3 is more than or equal to 1 in the length direction of the overflow tank body 1, but the number of the blocks is less than or equal to 9 in order to reduce the control difficulty. The heat exchange component 3 is arranged in the top space of the overflow groove body 1, the length direction of the heat exchange component at least exceeds the whole length of the overflow groove body 1, and the single side of the heat exchange component exceeds the boundary of the overflow groove by less than or equal to 200mm; the width direction of the heat exchange part 3 at least exceeds the whole width of the overflow groove body 1, and the single side exceeds the boundary of the overflow groove by less than or equal to 200mm. The installation position of the heat exchange component 3 is at the upper part of the overflow trough body 1, and the distance from the high point of the overflow trough is more than or equal to 50mm and less than or equal to 350mm. Through multiple tests, the coverage area is set, the temperature control effect is optimal, and the specific implementation and control are convenient; the heat exchange medium of the heat exchange member 3 may be gas or liquid. Whichever heat exchange medium is adopted ensures that the surplus heat to the top of the overflow trough body 1 is led out, thereby ensuring that the glass liquid temperature at the upper part of the overflow trough body is within a certain controllable range.
The embodiment provides a concrete implementation method of the temperature-adjustable overflow trough, which comprises the following steps:
(1) The left side and the right side of the overflow tank body 1 are respectively provided with a plurality of heaters 2 which are sequentially arranged from top to bottom and can be symmetrically arranged; the heat exchange component 3 is arranged in the space above the top of the overflow tank body 1, preferably ensuring that the top of the overflow tank body 1 is fully covered, and the distance is preferably 50mm-350 mm; the length and width of the single side are not more than 200mm.
(2) After the assembly is completed, the heater 2 and the heat exchange component 3 are opened, and the heat dissipation temperature of the heater 2 is regulated and controlled according to the temperature requirement, so that the temperature of the glass liquid is ensured to be reduced according to a preset curve.
(3) The temperature at the top of the overflow trough body 1 can be detected by a temperature measuring instrument, if the temperature does not meet the requirement, the heat exchange component 3 can be regulated and controlled, and then the temperature and flow of the medium in the heat exchange component 3 can be regulated and controlled, so that the surplus heat to the top of the overflow trough body 1 is ensured to be exported, and the glass liquid temperature at the upper part of the overflow trough body is ensured to be within a certain controllable range.
(4) The molten glass flows out of the isopipe body 1, flows downward along the bottom outer surface of the wedge-shaped structure of the isopipe body 1, merges at the bottom, flows downward and stretches downward, forming a base glass.
By the method, the overflow quality can be effectively controlled, and the thickness of the substrate glass, namely the quality of a finished product, is further ensured.
The above embodiment is only one of the implementation manners capable of implementing the technical solution of the present utility model, and the scope of the claimed utility model is not limited to the embodiment, but also includes any changes, substitutions and other implementation manners easily recognized by those skilled in the art within the technical scope of the present utility model.
Claims (10)
1. An overflow trough with adjustable temperature is characterized by comprising an overflow trough body (1);
the left side and the right side of the overflow trough body (1) are respectively provided with a plurality of heaters (2), and the heaters (2) on each side are sequentially distributed from top to bottom;
a heat exchange component (3) is arranged above the top of the overflow trough body (1).
2. An overflow launder with adjustable temperature according to claim 1, characterised in that the heat exchange element (3) is in a unitary distribution covering the top of the launder body (1).
3. An overflow launder with adjustable temperature according to claim 2, characterised in that the length of the heat exchange element (3) is greater than the length of the overflow launder body (1), the width of the heat exchange element (3) being greater than the width of the overflow launder body (1).
4. A temperature-adjustable isopipe according to claim 3, wherein the difference in length between the heat exchange member (3) and the isopipe body (1) is less than or equal to 200mm; the difference of the width of the heat exchange part (3) and the overflow groove body (1) is less than or equal to 200mm.
5. An overflow launder with adjustable temperature according to claim 1, characterised in that the heat exchange elements (3) are distributed in blocks covering the top of the launder body (1).
6. The overflow trough with adjustable temperature according to claim 5, wherein the heat exchange components (3) are symmetrically arranged at the left and right sides of the axis of the overflow trough body (1), and the number of the single-side partitions is less than or equal to 5.
7. The overflow trough with adjustable temperature according to claim 5, wherein the heat exchange components (3) are distributed on the axial direction of the overflow trough body (1), and the number of the blocks is less than or equal to 9.
8. An overflow launder with adjustable temperature according to claim 1, characterised in that the heat exchange element (3) is located at a distance of 50-350 mm from the top of the launder body (1).
9. An overflow launder with adjustable temperature according to claim 1, characterised in that the heat exchange element (3) is a cooling coil.
10. An overflow launder with adjustable temperature according to claim 1, characterized in that the bottom of the overflow launder body (1) is of wedge-shaped construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223319543.9U CN219032002U (en) | 2022-12-09 | 2022-12-09 | Adjustable temperature overflow launder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223319543.9U CN219032002U (en) | 2022-12-09 | 2022-12-09 | Adjustable temperature overflow launder |
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| CN219032002U true CN219032002U (en) | 2023-05-16 |
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| CN202223319543.9U Active CN219032002U (en) | 2022-12-09 | 2022-12-09 | Adjustable temperature overflow launder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115872605A (en) * | 2022-12-09 | 2023-03-31 | 彩虹显示器件股份有限公司 | Temperature-adjustable overflow trough, control system and method |
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- 2022-12-09 CN CN202223319543.9U patent/CN219032002U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115872605A (en) * | 2022-12-09 | 2023-03-31 | 彩虹显示器件股份有限公司 | Temperature-adjustable overflow trough, control system and method |
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