Annealing kiln

Abstract

The utility model discloses an annealing kiln which comprises the following components: a first housing which comprises a first thermal insulation cavity and a working cavity, the first thermal insulation cavity is arranged at the periphery of the working cavity in a surrounding manner, the first thermal insulation cavity is of a sealed open-loop structure, an open-loop gap of the first thermal insulation cavity is arranged at the side part of the first housing, and the first thermal insulation cavity is filled with thermal insulation cotton; the roller is arranged in the working cavity and comprises a rotating shaft and a bearing surface, the rotating shaft penetrates through the side part and the open-loop notch to form an extension groove, the extension groove is not filled with heat preservation cotton, the bearing surface extends to the extension groove towards the side part, and part of the bearing surface is arranged opposite to the side wall of the extension groove; the heat preservation part is arranged on the outer side, back on to the working cavity, of the side part of the first shell, and the rotating shaft sequentially penetrates through the extension groove, the side part and the heat preservation part from the working cavity. According to the utility model, the transverse width of the annealing kiln can be enlarged, the drawing quality is not reduced while the net plate width requirement of the photovoltaic glass plate in the current market is met, and the yield of photovoltaic glass production is improved.

Description

Technical Field

[0001] This utility model relates to the field of thermal equipment technology, and in particular to an annealing kiln. Background Technology

[0002] An annealing furnace is a thermal processing device used for annealing glass. It is primarily used to cool glass that has reached a certain temperature to improve its properties. During annealing, internal stresses are released, and the grain structure recrystallizes, thereby improving its mechanical properties and dimensional stability.

[0003] Annealing furnaces are widely used in the annealing of photovoltaic glass panels. As a core component of photovoltaic power generation systems, photovoltaic modules are experiencing rapid price declines due to localization and technological iteration. The entire industry chain faces pressure to reduce costs, making cost reduction in photovoltaic glass panel production particularly urgent. Currently, photovoltaic glass panels are trending towards larger and lighter designs, leading to corresponding changes in their dimensions and thickness. The original width of a photovoltaic glass panel typically includes the net width and the edge-cleaning width, with the edge-cleaning width referring to the width used for cutting the glass panel.

[0004] The existing annealing furnaces are not wide enough to meet the changing requirements of the net width of photovoltaic glass panels in the market. Providing different annealing furnaces for different net width requirements would be very costly. Therefore, for existing annealing furnaces, for example, when the net width of photovoltaic glass panels increases, the solution is usually to increase the edge cleaning width to achieve annealing, but this solution will reduce the yield. Alternatively, the solution is to reduce the original panel width to achieve annealing, but this solution will lead to a decrease in drawing quality, which will not reach the designed melting capacity of the furnace, resulting in a large amount of energy waste and increased costs. Utility Model Content

[0005] The purpose of this invention is to solve the technical problem that existing annealing furnaces cannot meet the changing market requirements for the net width of photovoltaic glass panels. This invention provides an annealing furnace that can expand its lateral width, meeting the current market requirements for the net width of photovoltaic glass panels without reducing drawing quality, thus improving the yield rate of photovoltaic glass production.

[0006] To solve the above-mentioned technical problems, an embodiment of this utility model discloses an annealing furnace, comprising:

[0007] The first housing includes a first insulation cavity and a working cavity. The first insulation cavity is arranged around the periphery of the working cavity. The first insulation cavity is a sealed open-loop structure. The open-loop notch of the first insulation cavity is located on the side of the first housing. The first insulation cavity is filled with insulation cotton.

[0008] A roller is disposed in the working chamber. The roller includes a rotating shaft and a bearing surface. The rotating shaft passes through the side portion. The open-ring notch forms an extension groove. The extension groove is not filled with the insulation cotton. The bearing surface extends toward the side portion to the extension groove. A portion of the bearing surface is disposed opposite to the side wall of the extension groove.

[0009] The heat insulation part is located on the side of the first housing facing away from the working cavity. The rotating shaft passes through the working cavity in sequence through the extension groove, the side and the heat insulation part.

[0010] Using the above technical solution, the first insulation cavity is a closed open-loop structure. An extension groove is provided at the open-loop notch of the first insulation cavity, and the extension groove is not filled with insulation cotton, allowing the bearing surface to extend to the side into the extension groove until a portion of the bearing surface is opposite to the sidewall of the extension groove. Thus, by setting the extension groove, the width of the working cavity of the annealing furnace is effectively widened. When wider glass plates are required, the bearing surface can be used to support wider glass plates, and the glass plate can extend into the extension groove. This eliminates the need to increase the edge cleaning width or reduce the original plate width, without reducing the drawing quality or the production yield, thereby achieving efficient annealing of wider glass plates.

[0011] According to another specific embodiment of the present invention, an annealing kiln is disclosed. The first shell includes an inner shell, an outer shell, and a first support plate. The outer shell and the inner shell are spaced apart and enclose each other to form a first heat preservation cavity. The inner shell encloses a working cavity on the side opposite to the first heat preservation cavity. The first support plate forms the side wall and is used to enclose the first heat preservation cavity together with the inner shell and the outer shell to form a closed first heat preservation cavity.

[0012] Using the above technical solution, the first support plate, the inner shell, and the outer shell together form a closed first insulation cavity, which can not only provide support for the insulation cotton, but also maintain the temperature of the first insulation cavity in accordance with the requirements.

[0013] According to another specific embodiment of the present invention, an annealing kiln is disclosed. The first support plate includes a first part and a second part. The first shell includes a second support plate. The second support plate forms the bottom wall of the extension groove. Along a first direction, the first part and the second part are spaced apart on both sides of the second support plate. The rotating shaft passes through the second support plate.

[0014] Using the above technical solution, the second support plate is attached to the bottom wall of the extension groove, and the rotating shaft passes through the second support plate, which can provide stable support for the rotating shaft. In addition, the first support plate and the second support plate can also jointly improve the strength of the side of the first shell.

[0015] According to another specific embodiment of the present invention, an annealing kiln is disclosed. Along a second direction, the annealing kiln includes a radiative heat exchange zone and a forced convection cooling zone connected in sequence. The extension groove is distributed along the second direction in the radiative heat exchange zone and the forced convection cooling zone, and the second direction is the conveying direction of the roller.

[0016] By adopting the above technical solution, the extension groove runs through the radiation heat exchange zone and the forced convection cooling zone along the second direction, and the second direction is the conveying direction of the roller. Therefore, it can be ensured that the glass plate with increased width can be annealed continuously in the entire annealing furnace.

[0017] According to another specific embodiment of the present invention, an annealing furnace is disclosed, wherein the radiant heat exchange zone includes a plurality of first heat exchange tubes and a plurality of second heat exchange tubes. Along a third direction, the plurality of first heat exchange tubes are spaced apart at the top of the first shell, and the plurality of second heat exchange tubes are spaced apart at the bottom of the first shell.

[0018] Along the third direction, one of the first heat exchange tubes is located on the top of the first housing near the side portion, and one of the second heat exchange tubes is located on the bottom of the first housing near the side portion, for heat exchange on the portion of the glass plate supported by the bearing surface located in the extension groove.

[0019] Using the above technical solution, one of the second heat exchange tubes is located at the bottom of the first shell near the side of the extension groove, which can exchange heat on the part of the glass plate supported by the bearing surface located in the extension groove, so that the temperature of the lateral edge of the glass plate can be precisely controlled.

[0020] According to another specific embodiment of the present invention, an annealing kiln is disclosed, wherein the forced convection cooling zone includes multiple air boxes and multiple cooling pipes. Along a third direction, the multiple air boxes are spaced apart at the top of the first shell, and the multiple cooling pipes are spaced apart on the side of the roller facing away from the air boxes in a first direction.

[0021] Along the third direction, one of the air boxes is located on the top of the first housing near the side portion, and one of the cooling pipes is located on the side of the roller near the side portion.

[0022] According to another specific embodiment of this utility model, an annealing furnace is disclosed, in which each air box includes an air outlet. Along a third direction, the air outlet area covered by multiple air outlets has a first width, which is not less than the second width of the supporting surface. Using the above technical solution, in the forced convection cooling zone, the air outlet extends towards the extension groove, cooling the portion of the glass plate supported by the supporting surface located in the extension groove, thereby precisely controlling the temperature of the lateral edge of the glass plate.

[0023] According to another specific embodiment of the present invention, an annealing kiln is disclosed. Along a third direction, the heat preservation part includes a second shell. The second shell protrudes toward the side away from the working chamber. The protrusion height of the second shell is not less than the depth of the extension groove. The second shell and the outer shell enclose to form a second heat preservation cavity, and the second heat preservation cavity is filled with heat preservation material.

[0024] By adopting the above technical solution, the height of the second shell protrusion is not less than the depth of the extension groove, which increases the insulation thickness. The extension groove does not include the insulation cotton and will not cause a significant change in the temperature inside the working chamber, thereby keeping the overall insulation performance of the annealing furnace unchanged and ensuring good annealing quality.

[0025] According to another specific embodiment of the present invention, an annealing kiln is disclosed, wherein the insulation material includes an aluminum silicate fiber blanket and a ceramic fiber lining.

[0026] Using the above technical solution, the aluminum silicate fiber blanket has good softness, stable thermal performance and low thermal conductivity, while the ceramic fiber lining has low thermal conductivity and low heat capacity. The combined use of these two insulation materials can better achieve the insulation effect required by the process.

[0027] According to another specific embodiment of the present invention, an annealing furnace is disclosed, wherein the second shell is welded to the outer shell.

[0028] By adopting the above technical solution, the sealing performance between the first and second housings can be improved while ensuring a stable connection between the second housing and the outer housing. Attached Figure Description

[0029] Figure 1 A schematic diagram of a first size of a glass plate provided in some embodiments is shown.

[0030] Figure 2 A schematic diagram of a second size of glass plate provided in some embodiments is shown.

[0031] Figure 3 A schematic diagram of a third size of glass plate provided in some embodiments is shown.

[0032] Figure 4 A cross-sectional schematic diagram of an annealing furnace provided in an embodiment of this application is shown.

[0033] Figure 5 A partial schematic diagram of the annealing furnace provided in an embodiment of this application is shown.

[0034] Figure 5a A schematic diagram of the first heat-insulating cavity of the annealing furnace provided in an embodiment of this application is shown.

[0035] Figure 6 A schematic diagram showing the distribution of the radiant heat exchange zone and the forced convection cooling zone of the annealing furnace provided in the embodiments of this application is shown.

[0036] Figure 7 A schematic diagram of the forced convection cooling zone of the annealing furnace provided in this application embodiment is shown when the original plate width is W1.

[0037] Figure 8 This paper shows a schematic diagram of the forced convection cooling zone of the annealing furnace provided in the embodiment of this application when the original plate width is W1'. Detailed Implementation

[0038] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0039] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0041] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0042] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0043] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0044] Figures 1 to 3 The diagram illustrates the dimensional changes of the original glass sheet, where the width of the original glass sheet matches the transverse width of the annealing furnace. For example... Figure 1 As shown, the original width of the glass plate (W1) = N * net width (W3) + 2 * edge clearing width (W2), where N refers to the quantity of finished products. A larger N indicates a higher yield and lower cost. When the market requirement for the net width W3 changes, such as... Figure 2 As shown, for example, if the net board width increases from W3 to W3', while keeping the original board width W1 unchanged, the original board width W1 cannot be cut according to the original edge trimming width W2. Therefore, the edge trimming width W2 needs to be increased to W2'. (Compare...) Figure 1 and Figure 2 As can be seen, the value of N changes from 3 to 2. Therefore, increasing the edge clearing width W2' will make N smaller, thereby reducing the yield and increasing the cost.

[0045] In some embodiments, in order to avoid increasing the edge clearing width W2, a technical solution is adopted to reduce the original board width W1, such as... Figure 3 As shown, for example, if the original board width W1 is reduced to W1', although the edge clearing width W2 remains unchanged, the value of N is still different compared to... Figure 1The solution is to reduce the drawing mass. According to the formula: Drawing mass G = Drawing speed (m / h) * Original plate width (mm) * Average thickness (mm) * Density (kg / m²) * 1,000,000 (converted to volume in cubic meters) * 24 (converted to time in days), it can be seen that reducing the original plate width will lead to a decrease in drawing mass, thus failing to reach the designed melting capacity of the furnace, resulting in a significant waste of energy and further increasing costs.

[0046] Based on this, see Figure 4 , Figure 5 , Figure 5a This application provides an annealing kiln, including a first shell 10, a roller 20, and a heat insulation section 30. The first shell 10 includes a first heat insulation cavity 101 and a working cavity 102. The first heat insulation cavity 101 surrounds the working cavity 102 and is a sealed open-loop structure, filled with heat insulation cotton 1011. Exemplarily, the first shell 10 includes an inner shell 11 and an outer shell 12, spaced apart and enclosing the inner shell 11 to form the first heat insulation cavity 101. The inner shell 11 encloses the working cavity 102 on the side opposite to the first heat insulation cavity 101. Along a first direction X, the first shell 10 includes a top 13 and a bottom 14. Exemplarily, both the inner shell 11 and the outer shell 12 are steel structure shells, and the first heat insulation cavity 101 is filled with heat insulation cotton 1011 with excellent thermal stability. The thermal insulation cotton 1011 is fixed and compacted by fasteners (not shown in the figure) provided on the outer shell 12 and the inner shell 11. The fasteners can be anchor nails, etc., and this application does not limit them.

[0047] For example, the annealing furnace provided in this application embodiment is rectangular, therefore the first shell 10 includes two oppositely arranged sides 15. For ease of explanation, it will be understood that either side 15 will be used as an example in the following description. Furthermore, this application embodiment does not limit the shape of the annealing furnace; for example, it can be a hexagonal prism or other shapes.

[0048] In some embodiments, see Figure 4 , Figure 5 , Figure 5aA roller 20 is disposed in the working chamber 102. The roller 20 includes a rotating shaft 21 and a bearing surface 22. The rotating shaft 21 passes through the side portion 15 of the first housing 10. An open-ring notch 1012 of the first insulation chamber 101 is disposed in the side portion 15. The open-ring notch 1012 forms an extension groove 151, which is disposed in the open-ring notch 1012. The extension groove 151 is not filled with insulation cotton 1011. The bearing surface 22 extends towards the side portion 15 to the extension groove 151, and part of the bearing surface 22 is disposed opposite to the side wall 1511 of the extension groove 151. An insulation part 30 is disposed on the outside of the side portion 15 of the first housing 10, facing away from the working chamber 102. The rotating shaft 21 passes through the extension groove 151, the side portion 15, and the insulation part 30 in sequence from the working chamber 102.

[0049] Using the above technical solution, the first insulation cavity 101 is a sealed open-loop structure. An extension groove 151 is formed at the open-loop notch 1012 of the first insulation cavity 101, and the extension groove 151 is not filled with insulation cotton 1011, so that the bearing surface 22 can extend towards the side 15 into the extension groove 151 until a portion of the bearing surface 22 is opposite to the side wall 1511 of the extension groove 151. In this way, by setting the extension groove 151, the width of the working cavity 102 of the annealing furnace is effectively widened. When a wider glass plate is required, the bearing surface 22 can be used to support a wider glass plate, and the glass plate can extend into the extension groove 151. There is no need to increase the edge cleaning width or reduce the original plate width, and the drawing quality or production yield will not be reduced, thus achieving efficient annealing of wider glass plates.

[0050] In some embodiments, see Figure 5 , Figure 6 , Figure 7 Along the second direction Y, the annealing furnace includes sequentially connected radiant heat exchange zones 40 (e.g., Figure 4 , Figure 5 (as shown) and forced convection cooling zone 50 (as shown) Figure 7 , Figure 8 As shown), the extension groove 151 is disposed in the radiation heat exchange zone 40 along the second direction Y, which is the conveying direction of the roller 20. The annealing kiln includes a plurality of rollers 20 spaced apart along the second direction Y.

[0051] For example, the radiative heat transfer zone 40 includes zones A, B, and C. Zone A, also known as the pre-annealing zone, is used to homogenize the glass plate temperature as much as possible and to automatically control the glass plate to reach the upper limit of the annealing temperature. Zone B, also known as the annealing zone, is used to cool the glass plate to the lower limit of the annealing temperature at a suitable rate, keeping the residual stress of the glass plate within an allowable range. Zone C, also known as the post-annealing zone, is used for automatic control of the continued temperature drop of the glass plate, increasing the cooling rate without generating excessive temporary stress, keeping the temporary stress of the glass plate within a suitable range. For example, the forced convection cooling zone 50 includes zones D and F. Zone D, also known as the transition zone, and zone F, also known as the forced cooling zone, are used for direct forced convection cooling of the glass plate.

[0052] In some embodiments, see Figure 4 , Figure 5 Along the third direction Z, the insulation part 30 includes a second housing 31. The second housing 31 protrudes towards the side away from the working cavity 102. The height of the protrusion of the second housing 31 along the third direction Z is not less than the depth of the extension groove 151. The second housing 31 and the outer shell 12 enclose to form a second insulation cavity 32. The second insulation cavity 32 is filled with insulation material. The second housing 31 extends along the second direction Y (in... Figure 4 , Figure 5 In the diagram, the second direction Y is the direction perpendicular to the paper surface. Exemplarily, the insulation material includes an aluminum silicate fiber blanket and a ceramic fiber liner. The combined use of these two insulation materials achieves better insulation performance required by the process. Exemplarily, the second shell 31 is welded to the outer shell 12 of the side 15, which ensures a stable connection between the second shell 31 and the outer shell 12 while improving the sealing performance between the outer shell 12 and the second shell 31.

[0053] In some embodiments, see Figure 4 , Figure 5 The first housing 10 includes a first support plate 16, which forms the sidewall 1511 of the extension groove 151, for together with the inner housing 11 and the outer housing 12 to form a closed first heat-insulating cavity 101. Exemplarily, the first support plate 16 includes a first portion 161 and a second portion 162, and the first housing 10 includes a second support plate 17, which forms the bottom wall 1512 of the extension groove 151. Along the first direction X, the first portion 161 and the second portion 162 are spaced apart on both sides of the second support plate 17, and a rotating shaft 21 passes through the second support plate 17. Exemplarily, the first portion 161 and the second support plate 17 form an "L" shape, and the second portion 162 and the second support plate 17 form an "L" shape. The extension groove 151 is recessed towards the outer housing 12 along the third direction Z. The first portion 161, the second portion 162, and the second support plate 17 all extend along the second direction Y.

[0054] In some embodiments, see Figure 4 , Figure 5 , Figure 6 and combined Figure 1 The radiative heat exchange zone 40 includes a plurality of first heat exchange tubes 41 and a plurality of second heat exchange tubes 42. Along the third direction Z, the plurality of first heat exchange tubes 41 are spaced apart at the top 13 of the first housing 10, and the plurality of second heat exchange tubes 42 are spaced apart at the bottom 14 of the first housing 10. Along the third direction Z, one first heat exchange tube 41 is located on the top 13 of the first housing 10 near the side 15, and one second heat exchange tube 42 is located on the bottom 14 of the first housing 10 near the side 15, for heat exchange on the portion of the glass plate supported by the bearing surface 22 located in the extension groove 151. For example, the radiative heat exchange zone 40 includes 12 first heat exchange tubes 41 and 4 second heat exchange tubes 42. One end of each of the first heat exchange tubes 41 and the second heat exchange tube 42 is connected to an automatic valve for controlling the cooling airflow.

[0055] For example, when the original plate width increases from W1 to W1', the number of the first heat exchange tube 41 and the second heat exchange tube 42 is increased by one. Adding a first heat exchange tube 41 to the top 13 of the first housing 10 near the side 15, and adding a second heat exchange tube 42 to the bottom 14 of the first housing 10 near the side 15, enables heat exchange on the portion of the glass plate supported by the bearing surface 22 located in the extension groove 151, allowing for precise temperature control of the lateral edge of the glass plate. For example, when the original plate width is W1, M first heat exchange tubes 41 are spaced apart at the top 13 of the first shell 10, and N second heat exchange tubes 42 are spaced apart at the bottom 14 of the first shell 10. When the original plate width is W1', M+1 first heat exchange tubes 41 are spaced apart at the top 13 of the first shell 10, and N+1 second heat exchange tubes 42 are spaced apart at the bottom 14 of the first shell 10. The M+1th first heat exchange tube 41 and the N+1th second heat exchange tube 42 are located near the side 15.

[0056] This application does not limit the number of the first heat exchange tube 41 and the second heat exchange tube 42. For example, M and N can be 2, 3, 4, 5, 6, 15, 20, etc.

[0057] In some embodiments, see Figure 6 , Figure 7 , Figure 8 and combined Figure 5The forced convection cooling zone 50 includes multiple air boxes 51 and multiple cooling pipes 52. Along the third direction Z, the multiple air boxes 51 are spaced apart on the top 13 of the first housing 10, and the multiple cooling pipes 52 are spaced apart on the side of the roller 20 facing away from the air boxes 51 in the first direction X. Along the third direction Z, one air box 51 is located on the top 13 of the first housing 10 near the side 15, and one cooling pipe 52 is located on the side of the roller 20 near the side 15.

[0058] For example, the forced convection cooling zone 50 includes 3 air boxes 51 and 14 cooling pipes 52. The number of air boxes 51 and cooling pipes 52 is not limited in this embodiment of the application. For example, it can be 2, 3, 4, 5, 6, 15, 20, etc.

[0059] For example, since the temperature of the glass plate has dropped significantly after passing through the radiant heat exchange zone 40 and the glass has been completely hardened, the first housing 10 of the forced convection cooling zone 50 does not include insulation cotton. The side 15 of the first housing 10 has a smaller width in the third direction Z. Even without the extension groove, the roller 20 will not interfere with or collide with the side 15. The bearing surface 22 can be extended along the third direction Z to bear a glass plate with a larger original plate width.

[0060] For example, each air box 51 includes an air outlet 511. Along the third direction Z, the air outlet area covered by the plurality of air outlets 511 has a first width A1. The first width A1 is not less than the second width of the bearing surface 22, that is, the first width A1 is not less than the width W1 of the original plate supported by the bearing surface 22. For example, as... Figure 7 As shown, when the original panel width is W1, the first width of the air outlet area covered by the air outlets 511 of the multiple air boxes 51 is A1. The first width A1 of the air outlet area is not less than the original panel width W1. Figure 8 As shown, when the original plate width increases from W1 to W1', the first width of the air outlet area covered by the air outlets 511 of the multiple air boxes 51 is increased from A1 to A2, and the first width A2 of the air outlet area is not less than the original plate width W1'.

[0061] Using the above technical solution, in the forced convection cooling zone 50, the air outlet 511 extends toward the extension groove 151 to cool the portion of the glass plate supported by the bearing surface 22 located in the extension groove 151, so that the temperature of the lateral edge of the glass plate can be precisely controlled.

[0062] In some embodiments, the annealing furnace includes a drive unit 60 along the third direction Z. The drive unit 60 is spaced apart from the outer shell 12. The rotating shaft 21 of the roller 20 extends out of the first shell 10 and is connected to the drive unit 60. The drive unit 60 drives the roller 20 to rotate, so that the glass plate is sequentially conveyed from the radiative heat exchange zone 40 to the forced convection cooling zone 50 along the second direction Y.

[0063] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. An annealing kiln, characterized in that, include: The first housing includes a first insulation cavity and a working cavity. The first insulation cavity is arranged around the periphery of the working cavity. The first insulation cavity is a sealed open-loop structure. The open-loop notch of the first insulation cavity is located on the side of the first housing. The first insulation cavity is filled with insulation cotton. A roller is disposed in the working chamber. The roller includes a rotating shaft and a bearing surface. The rotating shaft passes through the side portion. The open-ring notch forms an extension groove. The extension groove is not filled with the insulation cotton. The bearing surface extends toward the side portion to the extension groove. A portion of the bearing surface is disposed opposite to the side wall of the extension groove. The heat insulation part is located on the side of the first housing facing away from the working cavity. The rotating shaft passes through the working cavity in sequence through the extension groove, the side and the heat insulation part.

2. The annealing furnace as described in claim 1, characterized in that, The first housing includes an inner housing, an outer housing, and a first support plate. The outer housing and the inner housing together form the first heat-insulating cavity. The inner housing forms the working cavity on the side opposite to the first heat-insulating cavity. The first support plate forms the sidewall of the extension groove and is used to jointly enclose the first heat-insulating cavity with the inner housing and the outer housing to form a closed first heat-insulating cavity.

3. The annealing furnace as described in claim 2, characterized in that, The first support plate includes a first part and a second part, the first housing includes a second support plate, the second support plate forms the bottom wall of the extension groove, the first part and the second part are spaced apart on both sides of the second support plate along a first direction, and the rotating shaft passes through the second support plate.

4. The annealing furnace as described in any one of claims 1-3, characterized in that, Along the second direction, the annealing furnace includes a radiant heat exchange zone and a forced convection cooling zone connected in sequence, and the extension groove is disposed in the radiant heat exchange zone along the second direction, which is the conveying direction of the roller.

5. The annealing furnace as described in claim 4, characterized in that, The radiative heat exchange zone includes a plurality of first heat exchange tubes and a plurality of second heat exchange tubes. Along a third direction, the plurality of first heat exchange tubes are spaced apart at the top of the first shell, and the plurality of second heat exchange tubes are spaced apart at the bottom of the first shell. Along the third direction, one of the first heat exchange tubes is located on the top of the first housing near the side portion, and one of the second heat exchange tubes is located on the bottom of the first housing near the side portion, for heat exchange on the portion of the glass plate supported by the bearing surface located in the extension groove.

6. The annealing furnace as described in claim 4, characterized in that, The forced convection cooling zone includes multiple air boxes and multiple cooling pipes. Along a third direction, the multiple air boxes are spaced apart on the top of the first housing, and the multiple cooling pipes are spaced apart on the side of the roller facing away from the air boxes in a first direction. Along the third direction, one of the air boxes is located on the top of the first housing near the side portion, and one of the cooling pipes is located on the side of the roller near the side portion.

7. The annealing furnace as described in claim 6, characterized in that, Each of the bellows includes an air outlet, and along the third direction, the air outlet area covered by the plurality of air outlets has a first width, the first width being not less than the second width of the bearing surface.

8. The annealing furnace as described in claim 2, characterized in that, Along a third direction, the insulation part includes a second shell, which protrudes toward the side away from the working cavity. The protrusion height of the second shell is not less than the depth of the extension groove. The second shell and the outer shell enclose to form a second insulation cavity, which is filled with insulation material.

9. The annealing furnace as described in claim 8, characterized in that, The insulation materials include aluminum silicate fiber blankets and ceramic fiber linings.

10. The annealing furnace as described in claim 8, characterized in that, The second housing is welded to the outer housing.

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