CN115304247A - Muffle furnace drainage plate crystallization prevention control device and method - Google Patents
Muffle furnace drainage plate crystallization prevention control device and method Download PDFInfo
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- CN115304247A CN115304247A CN202210744433.2A CN202210744433A CN115304247A CN 115304247 A CN115304247 A CN 115304247A CN 202210744433 A CN202210744433 A CN 202210744433A CN 115304247 A CN115304247 A CN 115304247A
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- heater
- silicon
- molybdenum
- drainage plate
- sleeve
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
- C03B17/06—Forming glass sheets
- C03B17/064—Forming glass sheets by the overflow downdraw fusion process; Isopipes therefor
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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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- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a muffle furnace drainage plate crystallization prevention control device and a muffle furnace drainage plate crystallization prevention control method. Once the silicon-molybdenum heater breaks down, the silicon-molybdenum heater can be replaced quickly on line, the equipment structure is simple and reliable, and the replacement operation efficiency is high. The special heater capable of being replaced on line is adopted to dynamically adjust and control the temperature of the plough share tip of the platinum baffle drainage plate of the overflow brick, so that the drainage plate is prevented and controlled from crystallizing on the premise of ensuring the safe operation of equipment, the quality of the formed production quality is improved and stabilized, and the service life of the muffle furnace is prolonged.
Description
Technical Field
The invention belongs to the field of liquid crystal substrate glass manufacturing, and particularly relates to a muffle furnace drainage plate crystallization prevention control device and method.
Background
The muffle furnace overflow brick is key forming equipment for producing substrate glass by an overflow down-draw method, platinum baffles are respectively arranged at the near end and the far end of the overflow brick, and the lower parts of the platinum baffles are structurally designed as drainage plates, so that the functions of improving the brick tip edge material of the overflow brick and stabilizing the plate width can be achieved. Glass devitrification is the phenomenon in which a glass blend releases energy, transforms into crystals and eventually precipitates crystals under certain conditions. The volume effect accompanying the devitrification of glass causes defects in the appearance and quality of the glass product, and the presence of the crystals greatly affects the thermal stability, physical properties, optical properties, stability of the flow state, and the like of the glass. The feed composition is the main internal cause of devitrification of glass and the temperature is an important external influencing factor.
Due to the reasons of the square property of the glass material of the substrate, the overflow forming viscosity of the brick tip and the like, the temperature change range of the glass liquid at the position of the brick tip drainage plate is closer to or even partially overlapped with the crystallization temperature of the glass of the substrate, and the flow rate of the glass liquid at the position of the drainage plate is relatively slowed down, so that the crystallization and the material size phenomena at the position of the brick tip drainage plate are easily caused in the production process, the production quality stability of the glass of the substrate is greatly influenced, and the service life of the muffle furnace is seriously influenced.
In the prior art, when the forming furnace is built, a corner heater device is arranged at a position near an overflow brick platinum drainage plate so as to compensate the problem of large heat dissipation of the drainage plate. Considering safety factors such as the change of the flow state of brick tips in the test production processes of equipment space, muffle furnace wetting and the like, the designed corner heater device is small in heating area, relatively far away from the position of the drainage plate, and not ideal in temperature compensation effect. Once the corner heater is damaged in production, the forming furnace body cannot be disassembled for online replacement, a permanent temperature cold field is formed, and the normal production quality is difficult to maintain. In addition, when the drainage plate generates crystallization and gradually becomes serious until the quality and grade of the product are difficult to ensure, the machine is generally stopped for 7 to 15 days, a special heater is used for carrying out crystallization treatment on the drainage plate, the yield loss of a production line is large in the period, and the stable supply of the product for a user is greatly influenced.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a muffle furnace drainage plate crystallization prevention and control device and a muffle furnace drainage plate crystallization prevention and control method.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
the utility model provides a muffle furnace drainage plate crystallization prevention controlling means, includes the heater sleeve pipe, has respectively seted up two trompils about 7 axisymmetric positions of glass board on the wall of forming furnace 1 both sides, four heater sleeve pipe one end is passed through in the trompil inserts forming furnace 1, four all install the silicon molybdenum heater in the heater sleeve pipe, the one end that the silicon molybdenum heater inserted in forming furnace 1 is the fever end, the other end of silicon molybdenum heater is the silicon molybdenum heater and does not send out the fever end, four the fever end of silicon molybdenum heater is close to drainage plate 10.
Furthermore, a high-temperature-resistant heat-insulating material is filled between the heating end of the silicon-molybdenum heater and the non-heating end of the silicon-molybdenum heater.
Further, a second thickness bellows 22 is provided between the first heater sleeve 3 and the fourth heater sleeve 34 of the four heater sleeves, and a thickness bellows 2 is provided between the second heater sleeve 32 and the third heater sleeve 33 of the four heater sleeves.
Furthermore, one end of the heater sleeve inserted into the forming furnace 1 is in an inclined plane open state.
Further, the heater sleeve is a corundum tube or a high-temperature resistant material.
Further, the shape of the silicon-molybdenum heater is a coil, a rod or a spiral.
Further, the silicon-molybdenum heater is connected with a power supply.
Further, the extending amount of the heater sleeve in the forming furnace 1 can be dynamically adjusted.
A muffle furnace drainage plate crystallization prevention control method of the device comprises the following steps:
adjusting the power of the silicon-molybdenum heater, adjusting the position of the silicon-molybdenum heater relative to the drainage plate 10 along with the sleeve of the heater, and changing the heating effect of the silicon-molybdenum heater on the glass liquid at the position of the drainage plate 10 and the radiant heat temperature field in the area;
when the silicon-molybdenum heater fails, the heater sleeve is pulled out of the forming furnace 1, the whole set of silicon-molybdenum heater and the heater sleeve are quickly replaced and inserted into the corresponding open holes, and the silicon-molybdenum heater is started after being reconnected with a power supply;
when other equipment is replaced, the power of the silicon-molybdenum heater is increased, and the temperature of the glass liquid at the position of the flow guide plate 10 is kept to be not lower than the crystallization temperature.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a muffle furnace drainage plate crystallization prevention control device, which is designed according to the structural characteristics and spatial layout of a forming furnace and a muffle furnace, a silicon-molybdenum heater is arranged in a heater sleeve, the temperature of the position where crystallization is most likely to occur at the plough share tip of a brick tip drainage plate is accurately adjusted and controlled by adopting a mode of opposite insertion type symmetrical distribution and heat radiation from two sides of the drainage plate, the heater device is dynamically adjustable relative to the position of the drainage plate, the device can be replaced online when in failure, even if the heater at one side is replaced in failure, the temperature requirement of the brick tip drainage plate can be maintained through replacement adjustment of the power of the heater at the other side, the generation of crystallization at the drainage plate is avoided and inhibited, the whole process condition in the glass production of an overflow down-draw method substrate is fully considered, the temperature requirement and the actual flow state of the brick tip drainage plate under different conditions in a furnace period of temperature rise, butt joint, wetting, production and the like of the muffle furnace and the forming furnace device are met, the temperature requirement and the actual flow material state of the brick tip drainage plate are maintained under different conditions in the furnace periods, the furnace edge-draw machine, the muffle furnace, the brick tip plate, the device and the glass deposition device are not interfered with each other furnace, the glass deposition device, the glass device is maintained, the safe and the temperature of the drainage plate is not lower than the temperature of the glass is effectively controlled, and the drainage plate is maintained, the glass is not lower than the temperature of the drainage plate, and the glass is effectively controlled, the glass is not lower than the temperature of the glass, and the temperature of the glass is not lower than the temperature of the glass is effectively.
Drawings
In order to more clearly explain the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural diagram of a muffle flow guide plate crystallization prevention and control device of the present invention.
Fig. 2 is a schematic position diagram of the muffle furnace drainage plate crystallization prevention control device.
Wherein: 1-forming furnace, 2-thickness bellows, 3-first heater sleeve, 4-first silicon-molybdenum heater non-heating end, 5-first silicon-molybdenum heater, 6-first high-temperature-resistant heat-preservation cotton, 7-glass plate, 8-muffle furnace, 9-overflow brick, 10-drainage plate, 22-second thickness bellows, 32-second heater sleeve, 33-third heater sleeve, 34-fourth heater sleeve, 42-second silicon-molybdenum heater non-heating end, 43-third silicon-molybdenum heater non-heating end, 44-fourth silicon-molybdenum heater non-heating end, 52-second silicon-molybdenum heater, 53-third silicon-molybdenum heater, 54-fourth silicon-molybdenum heater, 62-second high-temperature-resistant heat-preservation cotton, 63-third high-temperature-resistant heat-preservation cotton, and 64-fourth high-temperature-resistant heat-preservation cotton.
Detailed Description
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 of embodiments of the present invention 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 present invention, 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 or 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 to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which the product of the present invention is used to usually place, it is only for convenience of describing the present invention and simplifying the description, but it is not necessary to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed 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:
referring to fig. 1 to 2, the present invention provides a muffle furnace flow guide plate crystallization prevention control device, which comprises a first heater sleeve 3, a second heater sleeve 32, a third heater sleeve 33 and a fourth heater sleeve 34; the tip of an overflow brick 9 in a muffle furnace 8 is provided with a flow guide plate 10, one end of the flow guide plate 10 extends into a forming furnace 1, two openings are respectively formed in the two side walls of the forming furnace 1 at positions which are axisymmetrical with respect to a glass plate 7, one end of a first heater sleeve 3 is inserted into a cavity of the forming furnace 1 through one of the openings, a first silicon-molybdenum heater 5 is installed in the first heater sleeve 3, one end inserted into the forming furnace 1 is a heating end of the first silicon-molybdenum heater 5, the other end of the first silicon-molybdenum heater is a non-heating end 4, a second heater sleeve 32 is symmetrically arranged in the opening which is symmetric with the first heater sleeve 3, a second silicon-molybdenum heater 52 is installed in the second heater sleeve 32, one end inserted into the forming furnace 1 is a heating end of the second silicon-molybdenum heater 52, the other end of the second silicon-molybdenum heater is a non-heating end 42, one end of the third heater sleeve 33 and the second heater sleeve 32 are inserted into the openings which are positioned on the same side wall of the forming furnace 1 in the same direction as each other, a third heater sleeve 33 is provided with a third silicon-molybdenum heater 53, one end inserted into the forming furnace 1 is a fourth heater 53, one end of the third heater is a fourth heater is a non-molybdenum heater 54, a fourth heater 34 is a fourth heater which is a non-molybdenum heater 34 and a fourth heater 34 which is inserted into the silicon-molybdenum heater 34. First high-temperature-resistant heat-preservation cotton 6 is filled between the heating end of the first silicon-molybdenum heater 5 and the non-heating end 4 of the first silicon-molybdenum heater, second high-temperature-resistant heat-preservation cotton 62 is filled between the heating end of the second silicon-molybdenum heater 52 and the non-heating end 42 of the second silicon-molybdenum heater, third high-temperature-resistant heat-preservation cotton 63 is filled between the heating end of the third silicon-molybdenum heater 53 and the non-heating end 43 of the third silicon-molybdenum heater, fourth high-temperature-resistant heat-preservation cotton 64 is filled between the heating end of the fourth silicon-molybdenum heater 54 and the non-heating end 44 of the fourth silicon-molybdenum heater, and the high-temperature-resistant heat-preservation cotton or other high-temperature-resistant heat-preservation materials are filled or blocked so as to prevent the air flow penetrating through generated inside and outside the cavity of the forming furnace 1 through a heater sleeve. The second heater sleeve 32 and the third heater sleeve 33 are respectively arranged at two ends of the thickness bellows 2, and the first heater sleeve 3 and the fourth heater sleeve 34 are respectively arranged at two ends of the second thickness bellows 22, so as to ensure that the thickness of the produced substrate glass is more uniform.
The parts of the four silicon-molybdenum heaters extending into the cavity of the forming furnace 1 are heating ends, the heating ends of the silicon-molybdenum heaters are close to the drainage plate 10, and the parts of the furnace body embedded with the heat-insulating bricks, the furnace wall and the exposed furnace body are non-heating ends of the silicon-molybdenum heaters. The heater sleeve is a corundum tube or other high-temperature-resistant materials, the heater sleeve plays a role in supporting and protecting the silicon-molybdenum heater, the upper end of the part of the heater sleeve extending into the cavity of the forming furnace is open, the silicon-molybdenum heater mounted in the sleeve conveniently radiates heat of the drainage plate 10 in the muffle furnace 8, and the position of the heater sleeve relative to the drainage plate 10 is dynamically adjustable. The power of the silicon-molybdenum heater can be adjusted within a certain process equipment range, and the position of the silicon-molybdenum heater relative to the drainage plate 10 can be adjusted along with the sleeve of the heater, so that the heating effect of the silicon-molybdenum heater on the glass liquid on the drainage plate 10 and the radiant heat temperature field in the area are changed, and the devitrification at the drainage plate 10 is avoided and inhibited.
The heater sleeve pipe is connected with the silicon-molybdenum heater in an installing mode, the outer portion of the heater sleeve pipe is exposed out of the forming furnace wall, the stretching amount of the heater sleeve pipe in the forming furnace cavity can be adjusted through dynamic plugging and unplugging according to the requirements of the glass flow state and the temperature field of the drainage plate 10 at the tip end of the overflow brick 9, the heater sleeve pipe can move back to the position which is not limited to the position which is parallel and level with the inner plane of the forming furnace cavity, and the flow fluctuation in the operations such as the wetting of the overflow brick 9 in the muffle furnace 8 can not affect the silicon-molybdenum heater. The temperature and the air flow blocking effect of the brick tip flow guide plate 10 can be correspondingly changed by combining the adjustment of the power of the silicon-molybdenum heater. Once the silicon-molybdenum heater fails in production, the heater sleeve can be pulled out of the forming furnace together, a whole set of new silicon-molybdenum heater and heater sleeve prepared in advance are quickly inserted into corresponding hole positions, the silicon-molybdenum heater is reconnected and started after being connected with a power supply, and quick online replacement can be realized.
The silicon-molybdenum heater includes, but is not limited to, silicon-molybdenum material, and may be made into various shapes including, but not limited to, coil shape, rod shape, spiral shape, etc. according to the actual needs of the site such as heating effect. The silicon-molybdenum heater and the heater sleeve do not interfere with equipment and devices such as a forming furnace edge roller, a brick tip plate and the like in use, when the equipment such as the edge roller is replaced for operation, the power of the silicon-molybdenum heater can be further increased, so that the temperature of glass liquid at the position of the drainage plate 10 is kept not lower than the crystallization temperature, the glass crystallization at the position of the drainage plate 10 is prevented and controlled, and the service life of the muffle furnace 8 is effectively prolonged.
According to the invention, through optimization and improvement of the equipment structure of the forming furnace 1, the on-line replaceable special silicon-molybdenum heater is adopted to dynamically adjust and control the temperature of the plough share tip part of the platinum baffle drainage plate 10 of the overflow brick 9, and on the premise of ensuring the safe operation of peripheral equipment, the effects of preventing and controlling the drainage plate from crystallizing, improving and stabilizing the quality of forming production and prolonging the service life of the muffle furnace 8 are achieved.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a muffle furnace drainage plate crystallization prevention controlling means, its characterized in that includes the heater sleeve pipe, has respectively seted up two trompils, four about glass board (7) axisymmetric position on forming furnace (1) both sides wall heater sleeve pipe one end is passed through in the trompil insert forming furnace (1), four all install the silicon molybdenum heater in the heater sleeve pipe, the one end in the silicon molybdenum heater insert forming furnace (1) is the end that generates heat, the other end of silicon molybdenum heater is the silicon molybdenum heater and does not generate heat the end, four the end that generates heat of silicon molybdenum heater is close to drainage plate (10).
2. The muffle furnace drainage plate crystallization prevention and control device according to claim 1, wherein a high-temperature-resistant heat-preservation material is filled between the heating end of the silicon-molybdenum heater and the non-heating end of the silicon-molybdenum heater.
3. The muffle flow guide plate crystallization prevention and control device according to claim 1, wherein a second thickness bellows (22) is arranged between a first heater sleeve (3) and a fourth heater sleeve (34) of the four heater sleeves, and a thickness bellows (2) is arranged between a second heater sleeve (32) and a third heater sleeve (33) of the four heater sleeves.
4. The muffle furnace flow guide plate crystallization prevention and control device according to claim 1, wherein one end of the heater sleeve inserted into the forming furnace (1) is in an inclined surface open state.
5. The muffle flow guide plate crystallization prevention and control device according to claim 1, wherein the heater sleeve is a corundum tube or a high temperature resistant material.
6. The muffle flow guide plate crystallization prevention and control device according to claim 1, wherein the silicon-molybdenum heater is in a shape of a coil, a rod or a spiral.
7. The muffle flow guide plate crystallization prevention and control device according to claim 1, wherein the silicon-molybdenum heater is connected with a power supply.
8. The muffle flow guide plate devitrification prevention and control device according to claim 1, wherein the amount of the heater sleeve extending into the forming furnace (1) is dynamically adjustable.
9. A muffle furnace drainage plate crystallization prevention control method based on the device of claims 1-8 is characterized by comprising the following steps:
adjusting the power of the silicon-molybdenum heater, adjusting the position of the silicon-molybdenum heater relative to the drainage plate (10) along with the sleeve of the heater, and changing the heating effect of the silicon-molybdenum heater on the glass liquid at the position of the drainage plate (10) and the radiant heat temperature field in the area;
when the silicon-molybdenum heater fails, the heater sleeve is pulled out of the forming furnace (1), the whole set of silicon-molybdenum heater and the heater sleeve are quickly replaced and inserted into the corresponding open pore, and the silicon-molybdenum heater is started after being reconnected with a power supply;
when other equipment is replaced, the power of the silicon-molybdenum heater is increased, and the temperature of the glass liquid at the position of the flow guide plate (10) is kept to be not lower than the crystallization temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210744433.2A CN115304247A (en) | 2022-06-28 | 2022-06-28 | Muffle furnace drainage plate crystallization prevention control device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210744433.2A CN115304247A (en) | 2022-06-28 | 2022-06-28 | Muffle furnace drainage plate crystallization prevention control device and method |
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| CN115304247A true CN115304247A (en) | 2022-11-08 |
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| CN202210744433.2A Pending CN115304247A (en) | 2022-06-28 | 2022-06-28 | Muffle furnace drainage plate crystallization prevention control device and method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204550379U (en) * | 2015-02-03 | 2015-08-12 | 彩虹（合肥）液晶玻璃有限公司 | A kind of liquid crystal substrate glass retort furnace brick point drainage plate crystallization thing high temperature treating device |
| CN207933262U (en) * | 2017-11-22 | 2018-10-02 | 彩虹显示器件股份有限公司 | A kind of heating device for Muffle furnace |
| CN110746094A (en) * | 2019-09-29 | 2020-02-04 | 彩虹显示器件股份有限公司 | Substrate glass forming device and heating device of drainage area thereof |
| 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 |
| WO2020246275A1 (en) * | 2019-06-07 | 2020-12-10 | 日本電気硝子株式会社 | Glass plate manufacturing device and glass plate manufacturing method |
-
2022
- 2022-06-28 CN CN202210744433.2A patent/CN115304247A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204550379U (en) * | 2015-02-03 | 2015-08-12 | 彩虹（合肥）液晶玻璃有限公司 | A kind of liquid crystal substrate glass retort furnace brick point drainage plate crystallization thing high temperature treating device |
| CN207933262U (en) * | 2017-11-22 | 2018-10-02 | 彩虹显示器件股份有限公司 | A kind of heating device for Muffle furnace |
| WO2020246275A1 (en) * | 2019-06-07 | 2020-12-10 | 日本電気硝子株式会社 | Glass plate manufacturing device and glass plate manufacturing method |
| 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 |
| CN110746094A (en) * | 2019-09-29 | 2020-02-04 | 彩虹显示器件股份有限公司 | Substrate glass forming device and heating device of drainage area thereof |
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