CN115872605A - Temperature-adjustable overflow trough, control system and method - Google Patents
Temperature-adjustable overflow trough, control system and method Download PDFInfo
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- CN115872605A CN115872605A CN202211584840.8A CN202211584840A CN115872605A CN 115872605 A CN115872605 A CN 115872605A CN 202211584840 A CN202211584840 A CN 202211584840A CN 115872605 A CN115872605 A CN 115872605A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000006060 molten glass Substances 0.000 claims abstract description 27
- 238000001514 detection method Methods 0.000 claims description 35
- 239000011521 glass Substances 0.000 abstract description 36
- 230000000694 effects Effects 0.000 abstract description 19
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 230000002411 adverse Effects 0.000 abstract description 4
- 239000000758 substrate Substances 0.000 description 16
- 239000007788 liquid Substances 0.000 description 15
- 230000017525 heat dissipation Effects 0.000 description 7
- 238000007500 overflow downdraw method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000005357 flat glass Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000156 glass melt Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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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Abstract
The invention discloses a temperature-adjustable overflow trough, a control system and a method, which belong to the technical field of plane glass production.A plurality of heaters are respectively arranged on 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, the viscosity of molten glass can be ensured to rise according to a preset curve by the heaters on the two sides, the temperature of the lower part of the overflow trough body can be ensured only by increasing the power of the heater on the lower part of the overflow trough body, and the heat exchange part is adopted to carry out heat exchange on the upper part of the overflow trough body, so that the adverse effect of a chimney effect on the temperature (viscosity) of the molten glass on the upper part of the overflow trough is weakened and eliminated, and the temperature of the molten glass on the upper part and the lower part of the overflow trough body is well controlled, thereby achieving high-efficiency, stability and excellent overflow quality; the invention has simple structure, convenient disassembly and assembly, high performance-price ratio and important practical application value, and is convenient to operate and maintain.
Description
Technical Field
The invention belongs to the technical field of plane glass production, and particularly relates to a temperature-adjustable overflow trough, a control system and a method.
Background
With the use of a large number of devices with various flat panel display functions, such as notebook computers and smart phones, the market demand for manufacturing the flat substrate glass of the flat panel display is greatly increased. Meanwhile, due to the use of large-sized flat panel displays, increasingly higher requirements are put on parameters such as the size, the flatness and the internal stress of the flat substrate glass. The overflow downdraw method plays a significant role in the production of flat substrate glass. As an important component of a flat panel display device, the remaining components are attached to a flat glass, so that the flat glass is also called a substrate glass in the production of the flat panel display device. As the size of flat panel display devices is increased, the requirements for flatness and internal stress of flat glass are also increased in production and use. In the production of flat panel display devices, three important quality parameters required for substrate glass are: surface finish, flatness and internal stress.
The overflow downdraw method is widely applied to the production of plane substrate glass. In the production process of the overflow downdraw method, molten glass is treated and then drained into an overflow groove, and after passing through the overflow groove and turning over weirs at two sides of the overflow groove, the molten glass flows downwards along the wedge-shaped outer surface of the overflow groove, converges at the bottom, flows downwards and is stretched downwards, so that the planar substrate glass is obtained. Since the glass part that contacts the isopipe surface is buried inside the glass sheet during this process, the outer surface of the glass sheet does not contact anything other than air. Therefore, the flat substrate glass produced by the overflow downdraw method can obtain the flat substrate glass with good outer surface quality due to the inherent principle. In the production process of the overflow downdraw method, the quality of the substrate glass can be ensured only by good overflow quality which depends on the control of the overflow quality seriously. Due to the overflow quality requirement, the viscosity of the glass melt gradually rises from the top of the overflow trough to the bottom of the overflow trough, and the temperature gradually falls. Therefore, the temperature of the glass liquid at the top of the overflow groove is higher, and the temperature of the glass liquid at the bottom of the overflow groove is lower. However, in the conventional overflow vessel and control device, it is difficult to ensure that the viscosity of molten glass rises according to a predetermined curve, that is, the temperature of molten glass falls according to a predetermined curve, and further the temperature of the upper overflow vessel is affected, due to the influence of the chimney effect (hot air rise), thereby making process adjustment difficult. Meanwhile, due to the functional design of the overflow trough body (the cross section is of a wedge-shaped structure with a large upper part and a small lower part), in order to ensure the temperature of the lower part, the power of a heater at the lower part is used greatly, and the influence of the chimney effect on the temperature (viscosity) of the glass liquid at the upper part of the overflow trough is further increased.
Therefore, in the prior art, the temperature of the molten glass is difficult to be ensured to be reduced according to a preset curve, and the temperature of the molten glass on the upper part of the overflow groove is difficult to be ensured, so that the process is difficult to adjust, the overflow quality of the molten glass cannot be well controlled, and the quality of the substrate glass is greatly influenced.
Disclosure of Invention
In order to solve the technical problems, the invention provides a temperature-adjustable overflow trough, a control system and a method, which can reduce the temperature of molten glass according to a preset curve, ensure the temperature of the molten glass on the upper part of the overflow trough, facilitate process adjustment, well control the overflow quality of the molten glass and further ensure the quality of substrate glass.
In order to achieve the purpose, the invention adopts the following technical contents:
the temperature-adjustable overflow groove comprises an overflow groove 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 arranged 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 distributed integrally and cover the top of the overflow trough body.
Further, the length of the heat exchange member is greater than the length of the isopipe body, and the width of the heat exchange member is greater than the width of the isopipe body.
Further, the difference between the lengths of the heat exchange component and the overflow trough body is less than or equal to 200mm; the width difference between 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 block mode and cover the upper portion of the top of the overflow groove body.
Furthermore, the heat exchange components are symmetrically arranged on the left side and the right side of the axis of the overflow trough body, and the number of blocks on one side 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 distance between the heat exchange part and the top of the overflow trough body is 50-350 mm.
The temperature control system of the overflow trough comprises the temperature-adjustable overflow trough, a flow temperature detection component and an automatic control component;
the flow temperature detection component is used for detecting the temperature and the flow of the medium in the heat exchange component in the temperature-adjustable overflow trough;
the automatic control part is used for calculating the heat led out by the heat exchange part in real time and adjusting the temperature and the flow of a medium in the heat exchange part;
the temperature-adjustable overflow groove, the flow temperature detection component and the automatic control component are connected in pairs.
A temperature control method of an overflow trough is based on the temperature control system of the overflow trough and comprises the following steps:
the heater and the heat exchange component are turned on, the molten glass flows out of the overflow groove body, the flow rate and temperature detection component detects the temperature and the flow rate of the medium in the heat exchange component to obtain detection data, and the automatic control component adjusts the temperature and the flow rate of the medium in the heat exchange component according to the detection data.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a temperature-adjustable overflow trough, wherein a plurality of heaters are respectively arranged on 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 heaters on the two sides can ensure that the viscosity of molten glass rises according to a preset curve, namely the temperature of the molten glass falls according to the preset curve; because the heater at the lower part of the overflow groove body needs to increase power to ensure the temperature of the lower part, the influence of a chimney effect on the temperature (viscosity) of the glass liquid at the upper part of the overflow groove can be further increased, at the moment, the heat exchange part is adopted to carry out heat exchange on the upper part of the overflow groove body, the adverse effect of the chimney effect on the temperature (viscosity) of the glass liquid at the upper part of the overflow groove is weakened and eliminated, the temperature of the glass liquid at the upper part and the lower part of the overflow groove body is well controlled, and therefore high-efficiency, stable and excellent overflow quality is achieved; the invention has simple structure, convenient disassembly and assembly, high performance-price ratio and higher popularization and application value.
Preferably, the exchange components of the present invention are integrally distributed to cover the top of the overflow trough body, so that the overall coverage can ensure the better heat dissipation requirement of the present device.
Further preferably, the length of the heat exchange part is greater than that of the overflow trough body, the width of the heat exchange part is greater than that of the overflow trough body, and the difference between the lengths of the heat exchange part and the overflow trough body is less than or equal to 200mm; the width difference value of the heat exchange part and the overflow groove body is less than or equal to 200mm, namely, the length of the single side of the heat exchange part exceeding the single side boundary of the overflow groove is not more than 200mm, on one hand, a certain coverage range is set in consideration of the heat dissipation effect, on the other hand, in consideration of the structural simplicity and the economic effect, and meanwhile, the better heat dissipation effect and the higher cost performance of the device are considered.
Preferably, the exchange members of the present invention are distributed in blocks, such that the temperature of the isopipe body over the top local area can be precisely adjusted to meet the requirements of a variety of operating conditions.
Preferably, the distance between the exchange part and the top of the overflow groove body is controlled between 50mm and 350mm, so that the heat dissipation effect cannot be achieved due to the fact that the distance between the exchange part and the top of the overflow groove body is too far; and the phenomenon that the heat dissipation is too strong due to too close distance and the adverse effect is caused to the manufacturing process can be avoided, and a better heat dissipation effect can be ensured.
The invention also provides a temperature control system of the overflow groove, which comprises the temperature-adjustable overflow groove, a flow temperature detection component and an automatic control component, wherein after the molten glass flows out of the overflow groove body, the flow temperature detection component is used for detecting the temperature and the flow of the medium in the heat exchange component, the detection result is transmitted to the automatic control component, the automatic control component is used for adjusting the temperature and the flow of the medium in the heat exchange component after calculation according to the detection result, and through multiple detection results and thermal overflow simulation, the introduced automatic control component can accurately adjust and control the redundant heat on the upper part of the overflow groove body led out by the heat exchange component, so that the high-efficiency, stable and excellent molten glass overflow quality is ensured.
The invention also provides a temperature control method of the overflow groove, and based on the temperature control system of the overflow groove, a novel temperature control mode of the overflow groove is introduced, so that the overflow quality of the molten glass of the overflow groove can be powerfully ensured, and the excellent quality of the glass of the flat panel display is ensured.
Drawings
FIG. 1 is a schematic diagram illustrating the connection between a heater and an isopipe body in an isopipe having an adjustable temperature according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a temperature-adjustable isopipe, in accordance with an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating the configuration of a temperature control system for an isopipe, in accordance with an embodiment of the present invention;
FIG. 4 is a flow chart illustrating a method for controlling the temperature of an isopipe, in accordance with an embodiment of the present invention;
reference numerals:
1-an overflow groove body, 2-a heater, 3-a heat exchange component, 4-a flow temperature detection component and 5-an automatic control component.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects of the present invention more apparent, the following embodiments further describe the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention 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 arranged from top to bottom; a heat exchange part 3 is arranged above the top of the overflow groove body 1, the distance between the heat exchange part 3 and the top of the overflow groove body 1 is 50-350 mm, and the heat exchange part 3 adopts a cooling coil pipe.
In particular, the heat exchange elements 3 are distributed over the top of the isopipe body 1 in two ways: first, the heat exchange elements 3 are distributed in a single piece and cover the top of the isopipe body 1.
The length of the heat exchange part 3 is larger than that of the overflow trough body 1, and the width of the heat exchange part 3 is larger than that of the overflow trough body 1. The length difference between the heat exchange part 3 and the overflow trough body 1 is less than or equal to 200mm; the width difference value between the heat exchange component 3 and the overflow chute body 1 is less than or equal to 200mm, so that the heat conduction area of the heat exchange component 3 above the top of the overflow chute body 1 is ensured.
The second distribution mode is as follows: (1) a two-sided arrangement is employed: the heat exchange parts 3 are distributed in a block mode and cover the upper part of the top of the overflow trough body 1. The heat exchange components 3 are symmetrically arranged at the left side and the right side of the axis of the overflow trough body 1, and the number of blocks at one side is less than or equal to 5.
(2) The single-row arrangement is adopted: the heat exchange components 3 are distributed in the axial direction of the overflow trough body 1, and the number of the blocks is less than or equal to 9.
The bottom of the overflow trough body 1 is in a wedge-shaped structure.
The invention also provides a temperature control system of the overflow groove, which comprises the temperature-adjustable overflow groove; further comprising:
the flow temperature detection component 4 is used for detecting the temperature and the flow of the medium in the heat exchange component 3 in the temperature-adjustable overflow trough;
the automatic control part 5 is used for calculating the heat led out by the heat exchange part 3 in real time according to the detection result and adjusting the temperature and the flow of the medium in the heat exchange part 3;
the temperature-adjustable overflow groove, the flow temperature detection part 4 and the automatic control part 5 are connected in pairs;
specifically, the heat exchange part 3 of the temperature-adjustable overflow trough is respectively connected with the flow temperature detection part 4 and the automatic control part 5.
A temperature control method of an overflow trough is based on the temperature control system of the overflow trough and comprises the following steps:
the heater 2 and the heat exchange part 3 are turned on, the molten glass flows out from the overflow trough body 1, the flow rate temperature detection part detects the temperature and the flow rate of the medium in the heat exchange part 3, and the automatic control part adjusts the temperature and the flow rate of the medium in the heat exchange part 3 according to the detection data.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components generally described in the figures herein and in the embodiments of the present invention may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually arranged when the product of the present invention is used, the description is merely for convenience and simplicity, and the indication or suggestion that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, cannot be understood as limiting the present invention. Furthermore, the terms "first," "second," and the like are used solely to distinguish one from another, and are not to 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. For example, "horizontal" merely means that the 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 invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The invention is described in further detail below with reference to the accompanying drawings:
examples
In this embodiment, as shown in fig. 1, in order to ensure that the viscosity of molten glass rises according to a predetermined curve, that is, to ensure that the temperature of the molten glass drops according to a predetermined curve, a plurality of heaters 2 are respectively arranged on two sides of an overflow trough body 1 from top to bottom, and the heaters 2 on the two sides are symmetrically arranged, and the molten glass flowing out of the overflow trough body 1 flows downwards along the outer surfaces of the two sides of the overflow trough, joins at the bottom, flows downwards and stretches downwards, so that the requirement that the temperature of the molten glass drops according to a predetermined curve is met, and thus, planar substrate glass is obtained; but because the bottom of isopipe body 1 (and also its lower portion) is wedge-shaped; in order to ensure the temperature of the lower part, the lower heater power is used greatly, the influence of the chimney effect on the temperature (viscosity) of the upper glass liquid of the overflow chute is increased, the temperature of the upper glass liquid is overhigh, in order to take the temperature of the upper glass liquid into consideration, as shown in figure 2, a heat exchange part is added above the top of the overflow chute body 1, the temperature of the upper overflow chute body 1 cannot be influenced while the power of the lower heater is increased, and the adverse effect of the chimney effect on the temperature (viscosity) of the upper glass liquid of the overflow chute body is weakened and eliminated.
The heat exchange component 3 adopts a pre-embedded cooling coil and is in an integrally packaged type. The heat exchange elements 3 may be of a monolithic or divided type (block arrangement). The heat exchange component 3 has a symmetrical structure in the width direction of the overflow trough 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 blocks of the heat exchange component 3 in the length direction of the overflow trough body 1 is more than or equal to 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 at least exceeds the whole length of the overflow groove body 1, and the single side exceeds the boundary of the overflow groove and is less than or equal to 200mm; the width direction of the heat exchange component 3 at least exceeds the whole width of the overflow trough body 1, and the single side exceeds the boundary of the overflow trough and is less than or equal to 200mm. The heat exchange component 3 is arranged at the upper part of the overflow trough body 1, and is more than or equal to 50mm and less than or equal to 350mm away from the high point of the overflow trough. Through multiple tests, the coverage range 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. No matter which heat exchange medium is adopted, the excess heat to the top of the overflow groove body 1 is guaranteed to be led out, so that the temperature of the glass liquid on the upper part of the overflow groove body is guaranteed to be within a certain controllable range.
The embodiment provides a specific implementation method of a temperature-adjustable overflow trough, which comprises the following steps:
(1) A plurality of heaters 2 are respectively arranged on the left side and the right side of the overflow trough body 1, are sequentially arranged from top to bottom and can be symmetrically arranged; a heat exchange part 3 is arranged in the space above the top of the overflow chute body 1, and the top of the overflow chute body 1 is preferably completely covered by a distance of 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 turned on, and the heat dissipation temperature of the heater 2 is regulated according to the temperature requirement, so that the temperature of the molten glass is reduced according to a preset curve.
(3) The temperature at the top of the overflow groove body 1 can be detected by the temperature measuring instrument, if the temperature does not meet the requirement, the heat exchange part 3 can be regulated and controlled by the temperature measuring instrument, so that the temperature and the flow of media in the heat exchange part 3 can be regulated and controlled, the excess heat on the top of the overflow groove body 1 can be guaranteed to be derived, and the temperature of the upper glass liquid of the overflow groove body can be guaranteed within a certain controllable range.
(4) The glass liquid flows out from the overflow groove body 1, flows downwards along the outer surface of the bottom of the wedge-shaped structure of the overflow groove body 1, joins at the bottom, flows downwards and stretches downwards, and substrate glass is formed.
By the method, the overflow quality can be effectively controlled, and the plate thickness of the substrate glass, namely the quality of a finished product, is further ensured.
In addition, in order to realize the control of the overflow quality automatically, as shown in fig. 3, this embodiment further provides a temperature control system of an overflow tank, which includes the temperature-adjustable overflow tank, and a flow temperature detecting unit 4 and an automatic control unit 5 are added outside the temperature-adjustable overflow tank, and the flow temperature detecting unit 4 is connected to the heat exchanging unit 3 of the temperature-adjustable overflow tank, and the flow temperature detecting unit 4 is used for detecting the temperature and the flow rate of the medium in the heat exchanging unit; the automatic control part 5, the flow temperature detection part 4 and the heat exchange part 3 are all in a connection state, on one hand, the detection result of the flow temperature detection part 4 is received, on the other hand, the heat exchange part 3 is controlled after calculation according to the detection result, and therefore the temperature and the flow of the medium in the heat exchange part 3 are adjusted.
Wherein the heat exchange member 3 has a function of conducting out excess heat from the upper portion of the overflow vessel body 1. The flow rate temperature detection means 4 detects the temperature and the flow rate of the heat exchange medium. The automatic control part 6 automatically adjusts the medium flow according to the temperature of the periphery of the overflow groove and the temperature (namely, a detection result) and the flow of the heat exchange medium, and ensures that the heat exchange part 3 can transmit the required heat from the top of the overflow groove body 1.
Specifically, the method comprises the following steps: a heat exchange part 3 is arranged at the upper part of the overflow trough body 1, a flow temperature detection part 4 is arranged outside the overflow trough body 1 in a non-high temperature area, and an automatic control part 5 is added in the system to form a complete control system. The heat exchange part 3 adopts gas or liquid media to perform heat exchange, the temperature and the flow of the heat exchange media are accurately detected through the flow temperature detection part 4, the heat quantity led out by the heat exchange part is accurately calculated through the automatic control part 5, and the flow of the heat exchange part 3 is further accurately controlled by combining a temperature detection signal of the temperature-adjustable overflow groove, so that the temperature fluctuation of the upper part of the overflow groove body 1 caused by chimney effect is reduced.
According to the above system, the present embodiment further provides a method for controlling the temperature of an overflow tank, as shown in fig. 4, including:
the heater 2 and the heat exchange part 3 are turned on, the molten glass flows out from the overflow trough body 1, the flow rate temperature detection part detects the temperature and the flow rate of the medium in the heat exchange part 3, and the automatic control part adjusts the temperature and the flow rate of the medium in the heat exchange part 3 according to the detection data.
By adopting the temperature control system and method of the overflow trough in the embodiment, the temperature control of the overflow trough can be automatically realized, the high-efficiency, stable and excellent overflow quality can be ensured, and the excellent quality of the flat panel display glass (substrate glass) can be further ensured.
The above-described embodiment is only one of the embodiments that can implement the technical solution of the present invention, and the scope of the present invention is not limited by the embodiment, but includes any variations, substitutions and other embodiments that can be easily conceived by those skilled in the art within the technical scope of the present invention disclosed.
Claims (10)
1. The temperature-adjustable overflow trough 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 arranged from top to bottom;
a heat exchange component (3) is arranged above the top of the overflow trough body (1).
2. A temperature-adjustable isopipe in accordance with claim 1, wherein the heat exchange elements (3) are distributed in one piece covering the top of the isopipe body (1).
3. A thermostatable isopipe according to claim 2, characterized in that the length of the heat exchanging element (3) is greater than the length of the isopipe body (1), and the width of the heat exchanging element (3) is greater than the width of the isopipe body (1).
4. A temperature-adjustable isopipe in accordance with claim 3, wherein the difference in length between the heat exchange element (3) and the isopipe body (1) is less than or equal to 200mm; the width difference between the heat exchange part (3) and the overflow trough body (1) is less than or equal to 200mm.
5. A temperature-adjustable isopipe in accordance with claim 1, wherein the heat exchange elements (3) are distributed in blocks over the top of the isopipe body (1).
6. The isopipe of claim 5, wherein said heat exchange members (3) are symmetrically arranged on the left and right sides of the axis of said isopipe body (1), and the number of blocks on one side is less than or equal to 5.
7. Isopipe in accordance with claim 5, characterized in that the heat exchanging elements (3) are distributed along the axis of the isopipe body (1) in a number of segments of 9 or less.
8. A temperature-adjustable isopipe in accordance with claim 1, wherein the heat exchange element (3) is located at a distance of 50-350 mm from the top of the isopipe body (1).
9. An isopipe temperature control system, comprising an isopipe of any one of claims 1-8, a flow rate temperature detection unit (4) and an automatic control unit (5);
the flow temperature detection part (4) is used for detecting the temperature and the flow of the medium in the heat exchange part (3) in the temperature-adjustable overflow trough;
the automatic control part (5) is used for calculating the heat led out by the heat exchange part (3) in real time and adjusting the temperature and the flow of a medium in the heat exchange part (3);
the temperature-adjustable overflow trough, the flow temperature detection part (4) and the automatic control part (5) are connected in pairs.
10. A method for controlling the temperature of an isopipe according to claim 9, comprising the steps of:
the heater (2) and the heat exchange component (3) are turned on, the molten glass flows out from the overflow trough body (1), the flow rate temperature detection component detects the temperature and the flow rate of the medium in the heat exchange component (3) to obtain detection data, and the automatic control component adjusts the temperature and the flow rate of the medium in the heat exchange component (3) according to the detection data.
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| CN211311296U (en) * | 2019-08-30 | 2020-08-21 | 彩虹显示器件股份有限公司 | Muffle furnace heating device and muffle furnace |
| CN112759241A (en) * | 2021-01-29 | 2021-05-07 | 彩虹显示器件股份有限公司 | Glass stress control device and method |
| CN114426391A (en) * | 2022-02-24 | 2022-05-03 | 彩虹显示器件股份有限公司 | Overflow groove heating device and muffle furnace |
| CN219032002U (en) * | 2022-12-09 | 2023-05-16 | 彩虹显示器件股份有限公司 | Adjustable temperature overflow launder |
-
2022
- 2022-12-09 CN CN202211584840.8A patent/CN115872605A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102674661A (en) * | 2012-03-31 | 2012-09-19 | 彩虹显示器件股份有限公司 | Temperature control method of glass plate shaping zone of overflow drop-down device |
| CN204198580U (en) * | 2014-09-30 | 2015-03-11 | 彩虹显示器件股份有限公司 | A kind of overflow downdraw produces the temperature-control device in base plate glass |
| CN106630557A (en) * | 2016-11-16 | 2017-05-10 | 芜湖东旭光电科技有限公司 | Muffle furnace for glass forming |
| CN208786343U (en) * | 2018-08-16 | 2019-04-26 | 湖北祥云(集团)化工股份有限公司 | A kind of melt overflow slot and high-tower granulation device |
| CN211311296U (en) * | 2019-08-30 | 2020-08-21 | 彩虹显示器件股份有限公司 | Muffle furnace heating device and muffle furnace |
| CN112759241A (en) * | 2021-01-29 | 2021-05-07 | 彩虹显示器件股份有限公司 | Glass stress control device and method |
| CN114426391A (en) * | 2022-02-24 | 2022-05-03 | 彩虹显示器件股份有限公司 | Overflow groove heating device and muffle furnace |
| CN219032002U (en) * | 2022-12-09 | 2023-05-16 | 彩虹显示器件股份有限公司 | Adjustable temperature overflow launder |
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