CN112939431A - Low-stress high-generation substrate glass online annealing equipment and annealing method - Google Patents
Low-stress high-generation substrate glass online annealing equipment and annealing method Download PDFInfo
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- CN112939431A CN112939431A CN202110128879.8A CN202110128879A CN112939431A CN 112939431 A CN112939431 A CN 112939431A CN 202110128879 A CN202110128879 A CN 202110128879A CN 112939431 A CN112939431 A CN 112939431A
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- annealing
- unit
- heating
- substrate glass
- brick
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- 238000000137 annealing Methods 0.000 title claims abstract description 120
- 239000011521 glass Substances 0.000 title claims abstract description 44
- 239000000758 substrate Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 61
- 239000011449 brick Substances 0.000 claims abstract description 60
- 238000002791 soaking Methods 0.000 claims abstract description 11
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 239000005357 flat glass Substances 0.000 claims description 6
- 239000011464 hollow brick Substances 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000011112 process operation Methods 0.000 abstract 1
- 230000035882 stress Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009694 cold isostatic pressing Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- -1 iron-chromium-aluminum Chemical compound 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B25/00—Annealing glass products
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
The invention discloses low-stress high-generation substrate glass online annealing equipment and an annealing method, and the equipment comprises a plurality of annealing furnace units which are arranged in parallel, wherein adjacent annealing furnace units are not in contact, a gap between adjacent annealing furnace units is a substrate glass passageway, each annealing furnace unit comprises a plurality of unit shells which are stacked in sequence, the outer walls of the tops of the unit shells can be detachably connected with baffles, the baffles are detachably connected with the adjacent unit shells, the unit shells are of structures with openings at two ends, heating bricks are arranged in the inner cavities of the unit shells, and soaking plates are arranged on the unit shells positioned in the substrate glass passageway. The invention has simple processing and manufacturing, easy assembly and high equipment expandability, and simultaneously, the structure of the invention is beneficial to the adjustment of process operation and can anneal the glass substrate on line.
Description
Technical Field
The invention belongs to the technical field of glass substrate manufacturing, and particularly belongs to low-stress high-generation substrate glass online annealing equipment and an annealing method.
Background
The substrate glass needs to be annealed after being formed so as to eliminate the thermal stress generated in the uneven temperature reduction process of the glass. High quality substrate glass requires that the glass have a low stress grade. Non-uniform stress in the substrate glass causes a reduction in the strength of the glass and even affects its optical uniformity, reducing its subsequent processing and use properties.
In the prior art, the annealing equipment structure of the substrate glass has rough control on the annealing process, secondary annealing is often needed to reduce the internal stress of the glass, and a large amount of energy and manpower are consumed. As the size of the substrate glass is increased, there is an increasing need for an annealing apparatus and an annealing method for in-line one-time annealing.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides low-stress high-generation substrate glass online annealing equipment and an annealing method, and solves the problems that the annealing process of the annealing equipment in the prior art is rough, secondary annealing is needed to reduce the internal stress of glass, and a large amount of energy and manpower are consumed.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a low stress high generation base plate glass online annealing equipment, includes a plurality of parallel arrangement's annealing stove unit, contactless between the adjacent annealing stove unit, and the clearance between the adjacent annealing stove unit is the base plate glass passageway, annealing stove unit includes a plurality of piled up unit shell in proper order, and all detachable on the top outer wall of unit shell is connected with the baffle, and the connection can be dismantled to baffle and adjacent unit shell, and the unit shell is both ends open structure, is provided with the heating brick in the inner chamber of unit shell, is located and is provided with the soaking plate on the unit shell in base plate glass passageway.
Furthermore, the heat insulation brick is placed in the inner cavity of the unit shell and is of a concave structure, the heating brick is arranged in a groove of the heat insulation brick, and a gap is reserved between the opening end of the groove of the heat insulation brick and the inner cavity of the unit shell.
Furthermore, the end face of the heating brick is provided with a heating wire groove, and a heating wire is wound in the heating wire groove.
Further, adjacent annealing furnace units are connected through annealing furnace side plates, and the annealing furnace side plates cover the openings of the unit shells.
Furthermore, the annealing furnace side plate comprises a first metal plate, a middle heat-insulating layer and a second metal plate which are sequentially stacked.
Furthermore, a plurality of openings are formed on the side plate of the annealing furnace.
Further, the soaking plate is made of ceramic materials.
Furthermore, the insulating brick is an alumina hollow brick.
The invention also provides an annealing method of the low-stress high-generation substrate glass online annealing equipment, which comprises the following steps of: the temperature of the heating brick in the outer shell of each unit is in a descending trend in the direction from the inlet of the annealing furnace unit to the outlet of the annealing furnace unit;
the two ends of the heating brick face to the two ends of the unit shell respectively, the heating power at the two ends of the heating brick is the same, and the heating power at the two ends of the heating brick is larger than the heating power between the two ends of the heating brick.
Furthermore, the inlet of the annealing furnace unit faces the outlet of the annealing furnace unit, the length of the annealing furnace unit is sequentially divided into an upper annealing area and a lower annealing area, and the temperature reduction rate of the heating bricks in the upper annealing area is lower than that of the heating bricks in the lower annealing area.
Compared with the prior art, the invention has at least the following beneficial effects:
the invention provides low-stress high-generation substrate glass online annealing equipment, which controls heat flow in a region by detachably arranging a connecting baffle on the outer wall of the top of a unit shell, reduces heat flow disturbance and stabilizes the heat flow, so that substrate glass is heated more uniformly when passing through a substrate glass passageway, and simultaneously, uneven heat radiation of a heating brick is converted into uniform heat radiation through a vapor chamber arranged on the outer wall of the unit shell, so that the surface of the substrate glass passing through the substrate glass passageway is uniformly heated in the transverse direction.
Furthermore, the insulating brick is arranged in the inner cavity of the unit shell, so that the heating brick is protected, the insulating effect is achieved, the heat leakage can be reduced, and the energy consumption is saved.
Furthermore, the annealing furnace side plate enables the middle heat-insulating layer to be pressed between the first metal plate and the second metal plate, so that heat insulation is performed on the inner cavity of the unit shell, and heat loss is reduced.
Furthermore, the plurality of holes arranged on the side plates of the annealing furnace facilitate the placement of rollers for clamping the substrate glass and the observation of the working condition of the annealing furnace unit and the condition of the substrate glass.
The annealing method provided by the invention is combined with the annealing equipment provided by the invention, so that the low-stress high-grade substrate glass can be obtained without secondary annealing operation, and a large amount of energy and human resources are saved.
Drawings
FIG. 1 is an isometric view of an annealing furnace without side panels;
FIG. 2 is a front view of an annealing furnace;
FIG. 3 is a side view of an annealing furnace;
FIG. 4 is a top view of an annealing furnace;
FIG. 5 is a partial view A of FIG. 1;
FIG. 6 is a schematic view showing the structure of a side plate of an annealing furnace;
FIG. 7 is a longitudinal temperature profile of an annealing process;
FIG. 8 is a lateral power profile of an annealing process;
in the drawings: 1-baffle plate, 2-unit shell, 3-insulating brick, 4-heating brick, 5-substrate glass, 6-soaking plate and 7-annealing furnace side plate;
x1 is the temperature change of the heating brick in the upper annealing zone and x2 is the temperature change of the heating brick in the lower annealing zone.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in figures 1 and 2, the invention provides low-stress high-generation substrate glass online annealing equipment which comprises a plurality of annealing furnace units and annealing furnace side plates 7, wherein each annealing furnace unit is arranged in parallel, adjacent annealing furnace units are not contacted, as shown in figures 3 and 4, a gap between every two adjacent annealing furnace units is a substrate glass passage, the annealing furnace units are divided into an upper annealing area and a lower annealing area according to the whole length of the annealing furnace units, and the length of the upper annealing area is 4-6 times of the length of the lower annealing area;
in this embodiment, the annealing furnace unit includes a baffle 1, a unit casing 2, insulating bricks 3, heating bricks 4, and soaking plates 6.
Specifically, the unit housing 2 is made of heat-resistant steel material and used for mechanical support, two ends of the unit housing 2 are opened, and a plurality of unit housings 2 are stacked in sequence;
The insulating brick 3 is placed in the inner cavity of the unit shell 2, the insulating brick 3 has certain strength and insulating effect, heat leakage is reduced, energy consumption is saved, the insulating brick 3 is of a concave structure, the heating brick 4 is placed in the groove of the insulating brick 3, and a gap is reserved between the opening end of the groove of the insulating brick 3 and the inner cavity of the unit shell 2; the insulating brick 3 is made of alumina hollow bricks or zirconia hollow bricks and the like.
As shown in fig. 5, the heating brick 4 is composed of a plurality of heating units, the grooves of the insulating brick 3 are filled with the plurality of heating bricks 4 in linear arrangement, two ends of the heating brick 4 respectively face the openings of two ends of the unit shell 2, heating wire grooves are arranged at two ends of the heating brick 4, heating wires are wound in the heating wire grooves, and the heating wires are platinum or iron-chromium-aluminum resistance wires.
The soaking plate 6 is made of ceramic material with good thermal conductivity, is plate-shaped, and is manufactured by adopting a cold isostatic pressing process. The soaking plate 6 is positioned on the outer side of the unit shell 2 and has a certain space with the heating brick 4, and specifically, the soaking plate 6 is positioned on the outer wall of the unit shell 2 on the substrate glass passageway. The uneven heat radiation of the single heating brick 4 can be converted into soaking heat radiation, so that the surface of the substrate glass 5 on the substrate glass passageway is uniformly heated in the transverse direction.
As shown in fig. 6, the annealing furnace side plate 7 is formed by sequentially stacking three materials, namely a first metal plate, an intermediate insulating layer and a second metal plate, to form a sandwich structure, and is used for insulating the openings of two sides of two adjacent annealing furnace units, and the annealing furnace side plate 7 covers the opening of the unit housing 2.
The annealing method using the annealing apparatus of the present invention includes the temperature control in the longitudinal direction of the whole annealing furnace and the lateral power control of the single unit case 2;
the longitudinal temperature control of the entire annealing furnace is the temperature history of the entire process from the time when the substrate glass 5 flows into the annealing furnace from the forming region to the time when it flows out of the annealing furnace. The inlet of the annealing furnace unit is towards the outlet direction of the annealing furnace unit, the length of the annealing furnace unit is sequentially divided into an upper annealing zone and a lower annealing zone, as shown in fig. 7, wherein X1 is the temperature change of the heating bricks in the upper annealing zone, X2 is the temperature change of the heating bricks in the lower annealing zone, the inlet of the annealing furnace unit is towards the outlet direction of the annealing furnace unit, the temperature of the heating bricks 4 in each unit housing 2 is in a descending trend, and the temperature descending rate of the heating bricks 4 in the upper annealing zone is lower than that of the heating bricks 4 in the lower annealing zone.
The transverse power of the single unit shell 2 is controlled to be symmetrically distributed from the near end of the annealing furnace to the far end of the annealing furnace, meanwhile, because the heat dissipation of the two side surfaces of the annealing furnace is larger than that of the middle part, the power of the two ends is larger, namely the heating power of the two ends of the heating brick 4 is the same, and the heating power of the two ends of the heating brick 4 is larger than the heating power between the two ends of the heating brick 4. The overall lateral power distribution is shown in fig. 8. It is noted that this distribution is only schematic and does not represent the best process conditions.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a low stress high generation base plate glass online annealing equipment, its characterized in that, including a plurality of parallel arrangement's annealing stove unit, contactless between the adjacent annealing stove unit, the clearance between the adjacent annealing stove unit is the base plate glass passageway, annealing stove unit includes a plurality of unit shell (2) piled up in proper order, all can dismantle on the top outer wall of unit shell (2) and be connected with baffle (1), and baffle (1) and adjacent unit shell (2) can be dismantled and connect, and unit shell (2) are both ends open structure, are provided with in the inner chamber of unit shell (2) and heat brick (4), are provided with soaking plate (6) on unit shell (2) that are located base plate glass passageway.
2. The on-line annealing equipment for low-stress advanced substrate glass according to claim 1, further comprising insulating bricks (3), wherein the insulating bricks (3) are placed in the inner cavity of the unit housing (2), the insulating bricks (3) are of a concave structure, the heating bricks (4) are arranged in the grooves of the insulating bricks (3), and gaps are left between the open ends of the grooves of the insulating bricks (3) and the inner cavity of the unit housing (2).
3. The on-line annealing equipment for low-stress advanced substrate glass according to claim 1, wherein the end face of the heating brick (4) is provided with a heating wire groove, and a heating wire is wound in the heating wire groove.
4. A low stress advanced substrate glass in-line annealing apparatus according to claim 1, wherein adjacent lehr units are connected by lehr side panels (7), the lehr side panels (7) covering the opening of the unit housing (2).
5. The in-line annealing apparatus for low-stress advanced substrate glass according to claim 4, wherein said lehr side plate (7) comprises a first metal plate, an intermediate insulating layer and a second metal plate laminated in this order.
6. A low stress advanced substrate glass on-line annealing equipment according to claim 4, wherein the side plate (7) of the annealing furnace is opened with several openings.
7. The in-line annealing equipment for low-stress advanced substrate glass according to claim 1, wherein the soaking plate (6) is a ceramic material.
8. The on-line annealing equipment for low-stress advanced substrate glass according to claim 1, wherein the insulating brick (3) is an alumina hollow brick.
9. The annealing method of the in-line annealing facility for low-stress high-generation substrate glass according to any one of claims 1 to 8, comprising the following steps:
the temperature of the heating brick (4) in each unit shell (2) is in a descending trend towards the outlet direction of the annealing furnace unit from the inlet of the annealing furnace unit;
the two ends of the heating brick (4) are respectively opened towards the two ends of the unit shell (2), the heating power at the two ends of the heating brick (4) is the same, and the heating power at the two ends of the heating brick (4) is larger than the heating power between the two ends of the heating brick (4).
10. The annealing method of a low-stress advanced substrate glass in-line annealing facility according to claim 9, wherein the length of the lehr unit is divided into an upper annealing zone and a lower annealing zone in the direction of the inlet of the lehr unit toward the outlet of the lehr unit, and the temperature decrease rate of the heating blocks (4) in the upper annealing zone is lower than that of the heating blocks (4) in the lower annealing zone.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110128879.8A CN112939431B (en) | 2021-01-29 | 2021-01-29 | Low-stress high-generation substrate glass online annealing equipment and annealing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110128879.8A CN112939431B (en) | 2021-01-29 | 2021-01-29 | Low-stress high-generation substrate glass online annealing equipment and annealing method |
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| Publication Number | Publication Date |
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| CN112939431A true CN112939431A (en) | 2021-06-11 |
| CN112939431B CN112939431B (en) | 2023-12-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115180809A (en) * | 2022-07-01 | 2022-10-14 | 毛立国 | Low-stress glass production system and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7000433B1 (en) * | 1999-05-17 | 2006-02-21 | Technopat Ag | Device for heating plates of glass |
| CN101439925A (en) * | 2008-12-25 | 2009-05-27 | 杭州蓝星新材料技术有限公司 | On-line film coating environment whole set adjusting device of float glass production line annealing kiln A0 zone |
| CN104310766A (en) * | 2014-09-24 | 2015-01-28 | 河北省沙河玻璃技术研究院 | A heating furnace used for drawing willow glass by secondary melting method |
| CN104962716A (en) * | 2015-07-02 | 2015-10-07 | 周海波 | Gas catalytic flameless near-infrared heating annealing furnace |
| CN107010819A (en) * | 2017-06-08 | 2017-08-04 | 深圳隆庆智能激光科技有限公司 | Mold heating device and 3D glass-forming dies |
| CN215440200U (en) * | 2021-01-29 | 2022-01-07 | 彩虹显示器件股份有限公司 | Low-stress high-generation substrate glass online annealing equipment |
-
2021
- 2021-01-29 CN CN202110128879.8A patent/CN112939431B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7000433B1 (en) * | 1999-05-17 | 2006-02-21 | Technopat Ag | Device for heating plates of glass |
| CN101439925A (en) * | 2008-12-25 | 2009-05-27 | 杭州蓝星新材料技术有限公司 | On-line film coating environment whole set adjusting device of float glass production line annealing kiln A0 zone |
| CN104310766A (en) * | 2014-09-24 | 2015-01-28 | 河北省沙河玻璃技术研究院 | A heating furnace used for drawing willow glass by secondary melting method |
| CN104962716A (en) * | 2015-07-02 | 2015-10-07 | 周海波 | Gas catalytic flameless near-infrared heating annealing furnace |
| CN107010819A (en) * | 2017-06-08 | 2017-08-04 | 深圳隆庆智能激光科技有限公司 | Mold heating device and 3D glass-forming dies |
| CN215440200U (en) * | 2021-01-29 | 2022-01-07 | 彩虹显示器件股份有限公司 | Low-stress high-generation substrate glass online annealing equipment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115180809A (en) * | 2022-07-01 | 2022-10-14 | 毛立国 | Low-stress glass production system and control method |
| CN115180809B (en) * | 2022-07-01 | 2023-12-15 | 山西利虎玻璃（集团）有限公司 | Low-stress glass production system and control method |
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| CN112939431B (en) | 2023-12-12 |
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