A nano-crystalline glass heat treatment device

Abstract

The application relates to the technical field of glass product annealing, in particular to a nano microcrystalline glass heat treatment device which comprises a heating furnace, an upper conveying line, a lower conveying line and a heating system, one side of the heating furnace is provided with an opening as an inlet and outlet, the other side is a sealed end, the upper conveying line and the lower conveying line are arranged in parallel along the length direction of the heating furnace in the heating furnace, and the upper conveying line is arranged above the lower conveying line. The upper conveying line and the lower conveying line arranged in parallel along the length direction and opposite in direction are arranged in the heating furnace, a transshipment mechanism is cooperated to form a transversely arranged U-shaped annealing heat treatment conveying path, compared with a traditional linear annealing furnace, the overall length of the equipment is greatly shortened, the space cost and layout difficulty of the factory building are reduced, meanwhile, the shortened furnace body reduces the energy consumption required for maintaining the temperature at each stage, the green energy-saving trend is met, the inlet and outlet are shared for feeding and discharging, the equipment structure is simplified, and the space utilization efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of glass annealing technology, specifically to a heat treatment device for nanocrystalline glass. Background Technology

[0002] Nanocrystalline glass is a novel composite material formed by uniformly dispersing nano-sized crystals in a glass matrix. It combines the transparency of glass with the high strength, high hardness, wear resistance, and corrosion resistance of ceramics. By precisely controlling the type, size, and distribution of nanocrystals, it can be customized to meet the performance requirements of multiple fields such as optics, electronics, and mechanics, and shows broad application prospects in cutting-edge fields such as precision instruments, aerospace, and medical devices.

[0003] The fabrication of nanocrystalline glass requires heat treatment, especially after molding, which involves annealing. This process involves slowly heating and holding the material within a specific temperature range while controlling the cooling rate to eliminate internal stresses generated during fabrication. This promotes the uniform growth of nanocrystals in the glass matrix and optimizes the microstructure, while preventing excessive crystal growth that could lead to the loss of nano-effects. As a result, the optical uniformity, mechanical strength, and dimensional stability of the glass are significantly improved.

[0004] Existing nanocrystalline glass is typically annealed using an annealing furnace. This furnace is equipped with a precise heating system to provide a stable and uniform annealing temperature environment. Most existing annealing furnaces operate in a linear fashion, with the loading and unloading areas located on opposite sides. To ensure annealing quality, the furnace body is usually quite long. This long furnace body occupies a large area, increasing factory space costs and layout complexity. Furthermore, maintaining the temperature at each stage over a long furnace body requires more energy, which is inconsistent with the trend towards green energy conservation. Summary of the Invention

[0005] The purpose of this invention is to provide a heat treatment apparatus for nanocrystalline glass to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution.

[0007] A heat treatment apparatus for nanocrystalline glass includes a heating furnace, an upper conveyor line, a lower conveyor line, and a heating system. The heating furnace has an opening on one side as an inlet and outlet, and a sealed end on the other side. The upper and lower conveyor lines are arranged parallel to each other in the heating furnace along its length, with the upper conveyor line positioned above the lower conveyor line. The upper conveyor line is used to transport the glass plate from the inlet and outlet to the sealed end side.

[0008] The lower conveyor line is used to transport the glass plate from the sealed end to the inlet / outlet side. A transfer mechanism is provided on the side of the heating furnace near the sealed end to transfer the glass plate from the upper conveyor line to the lower conveyor line. An unloading mechanism is provided outside the heating furnace near the inlet / outlet to load the glass plate to be annealed onto the upper conveyor line and unload the annealed glass plate from the lower conveyor line. The heating system is arranged inside the heating furnace along the length of the heating furnace.

[0009] Preferably, the transfer mechanism includes a drive motor, sprockets, chains, and temporary storage plates. Shafts are rotatably installed on the side of the heating furnace away from the inlet and outlet, and at locations higher than the upper conveyor line and lower than the lower conveyor line, respectively. A pair of sprockets are fixedly mounted on each of the two shafts. Chains are mounted on the two sprockets on the same side for common transmission. Several temporary storage plates for transferring glass plates from the upper conveyor line to the lower conveyor line are fixedly arrayed on the outer edge wall of the two chains. The drive motor is fixed on the outer wall of the heating furnace, and its output shaft is fixedly connected to one end of one of the shafts.

[0010] Preferably, the temporary storage plates are arranged at equal intervals, and the distance between two adjacent temporary storage plates is the same as the distance between the upper and lower upper surfaces of the upper and lower conveyor lines. When one of the temporary storage plates is close to the upper conveyor line and is flush with the conveyor surface above the upper conveyor line, the temporary storage plate below it is close to the lower conveyor line and is flush with the conveyor surface above the lower conveyor line.

[0011] Preferably, a side box is fixedly connected to the side wall of the heating furnace near the sealing end of the heating furnace. A U-shaped seat is provided inside the side box. A driving mechanism is provided on the U-shaped seat. A push plate B is provided on one end of the driving mechanism and a push plate C is provided on the other end. The driving mechanism is used to drive the push plate B and the push plate C to move closer to each other or further away from each other in the length direction of the heating furnace.

[0012] When pusher plate B and pusher plate C approach each other, pusher plate B is used to push the glass plate from the upper conveyor line to the temporary storage plate, and pusher plate C is used to push the glass plate from the temporary storage plate to the lower conveyor line, so as to realize the glass plate transfer.

[0013] Preferably, the drive mechanism includes a drive motor, a U-shaped guide rail, a rack and a gear. U-shaped guide rails are fixed to the two ends of the U-shaped seat, and racks are slidably installed on the sides of the two U-shaped guide rails that are close to each other. The drive motor is fixed on the U-shaped seat, and the gear is fixed on the output shaft end of the drive motor.

[0014] One rack is positioned above the gear, and the other rack is positioned below the gear. Both racks mesh with the gear. The end of one rack is fixedly connected to the push plate B via a connecting arm, and the other rack is fixedly connected to the push plate C via a connecting arm.

[0015] Preferably, a second push cylinder extending along the width direction of the heating furnace is fixed on the outer wall of the side box, and the telescopic end of the second push cylinder extends through into the side box, with a U-shaped seat fixed on the telescopic end of the second push cylinder.

[0016] Preferably, the loading and unloading mechanism includes a side frame and a main conveyor belt. The side frame is located on one side of the heating furnace, and the main conveyor belt is mounted on the side frame. The main conveyor belt extends along the width direction of the heating furnace and has a first conveying section and a second conveying section. The first conveying section is located above the second conveying section. A Z-shaped reversing section is located on the main conveyor belt between the first and second conveying sections. An loading conveyor belt is provided between the first conveying section and the upper conveyor line to transfer glass plates from the first conveying section to the upper conveyor line. An unloading conveyor belt is provided between the second conveying section and the lower conveyor line to transfer glass plates from the lower conveyor line to the second conveying section.

[0017] Preferably, a first pusher cylinder extending along the length of the heating furnace is fixed to the side of the side frame. The telescopic end of the first pusher cylinder extends through to the other side of the side frame and is equipped with a pusher plate A for pushing the glass plate on the first conveyor section onto the feeding conveyor belt.

[0018] Preferably, the heating system includes heating tubes, a middle uniform temperature plate is provided in the heating furnace between the upper and lower conveyor lines, the middle uniform temperature plate has an inner cavity, an upper uniform temperature plate is provided in the heating furnace above the upper conveyor line, the upper uniform temperature plate and the inner top wall of the heating furnace form an upper mounting cavity, a lower uniform temperature plate is provided in the heating furnace below the lower conveyor line, the lower uniform temperature plate and the inner bottom wall of the heating furnace form a lower mounting cavity, and several heating tubes are arranged in an array along the length of the heating furnace in the upper mounting cavity, lower mounting cavity and inner cavity.

[0019] Preferably, both the upper and lower conveyor lines are formed by an array of conveyor rollers arranged along the length of the heating furnace, with the conveyor rollers in the upper and lower conveyor lines rotating in opposite directions.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows.

[0021] The heating furnace is equipped with upper and lower conveyor lines that are parallel to each other along the length and turn in opposite directions. Together with the transfer mechanism, they form a transverse U-shaped conveying path for annealing heat treatment. Compared with traditional linear annealing furnaces, this significantly shortens the overall length of the equipment, reduces factory space costs and layout complexity. At the same time, the shortened furnace body reduces the energy consumption required to maintain the temperature at each stage, which is in line with the trend of green energy saving. Furthermore, the shared inlet and outlet for loading and unloading simplifies the equipment structure and improves space utilization efficiency.

[0022] Driven by a motor, the shaft rotates, causing the sprocket, chain, and temporary storage plate to rotate synchronously. This allows the glass plates from the upper conveyor line to be transferred sequentially to the lower conveyor line. The temporary storage plates are evenly spaced, with the spacing matching the surface spacing of the upper and lower conveyor lines. This ensures that the temporary storage plates are flush with the conveying surfaces of the upper and lower conveyor lines, enabling the glass plates to be transferred synchronously. The high degree of sequence matching during operation guarantees the stability of the glass plates during the transfer process.

[0023] The drive mechanism drives the gear to rotate via the drive motor, which meshes and drives the two racks to move in opposite directions, thereby driving pusher plate B and pusher plate C to move closer or further apart in the length direction of the heating furnace, thus pushing the glass plate from the upper conveyor line to the temporary storage plate and from the temporary storage plate to the lower conveyor line.

[0024] This structure utilizes a single drive source to achieve bidirectional pushing, reducing drive costs. Furthermore, the second pusher cylinder can push the U-shaped seat along the width of the heating furnace for feeding and resetting, preventing the pushing components from affecting the normal movement of the glass plate. This ensures the continuity and accuracy of the transfer process, effectively improving the efficiency and reliability of glass plate transfer.

[0025] The first and second conveying sections of the main conveyor belt are connected by a Z-shaped reversing section. Together with the loading and unloading conveyor belts, they realize the loading of glass plates to be annealed to the upper conveyor line and the unloading of glass plates after annealing. This irregularly shaped conveying mechanism design allows loading and unloading to share the same conveying mechanism, which not only reduces equipment cost investment, but also further reduces the space occupied by the equipment, and improves the automation level and process continuity of loading and unloading.

[0026] A symmetrical thermal field distribution can be formed between the upper and middle heat spreaders and between the middle and lower heat spreaders. When the glass plate moves in the two heating channels, the thermal stress difference in the thickness direction of the glass plate is effectively eliminated, making the growth of nanocrystalline phase more uniform. At the same time, it reduces heat loss at the end of the furnace body and is highly matched with the closed-loop conveying path composed of the upper conveying line, the lower conveying line and the transfer mechanism. In addition, the heat transfer of the middle heat spreader can simultaneously heat the glass plates on the upper and lower conveying lines, resulting in high heat utilization. Attached Figure Description

[0027] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0028] Figure 2 for Figure 1 Another perspective view of the structure shown;

[0029] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0030] Figure 4 for Figure 1 The schematic diagram of the heating furnace is omitted from the diagram shown.

[0031] Figure 5 for Figure 1 The diagram shows a cross-sectional view of the structure.

[0032] Figure 6 for Figure 5 Enlarged schematic diagram of the structure at point B;

[0033] Figure 7 This is a schematic diagram of the transfer mechanism structure in this invention;

[0034] Figure 8 This is a schematic diagram of the installation of the U-shaped seat structure in this invention;

[0035] Figure 9 This is a schematic diagram of the drive mechanism structure in this invention;

[0036] Figure 10 This is a schematic diagram showing the transfer of glass from the upper conveyor line to the lower conveyor line.

[0037] Figure 11 This is a schematic diagram showing the cooperation between the loading and unloading mechanism and the upper and lower conveyor lines in this invention;

[0038] Figure 12 This is a schematic diagram of the conveyor belt structure in this invention.

[0039] In the diagram: 1. Heating furnace; 11. Inlet / outlet; 12. Side box; 2. Loading / unloading mechanism; 21. Side frame; 211. First push cylinder; 212. Push plate A; 22. Main conveyor belt; 221. First conveying section; 222. Second conveying section; 223. Reversing section; 24. Loading conveyor belt; 25. Unloading conveyor belt; 3. Heating pipe; 31. Upper heat equalization plate; 311. Upper mounting cavity; 32. Lower heat equalization plate; 321. 33. Lower mounting cavity; 33. Middle temperature equalization plate; 331. Inner cavity; 4. Upper conveyor line; 5. Lower conveyor line; 6. Transfer mechanism; 61. Drive motor; 62. Shaft; 63. Sprocket; 64. Chain; 65. Temporary storage plate; 7. U-shaped seat; 71. Push plate B; 72. Push plate C; 8. Drive mechanism; 81. Drive motor; 82. U-shaped guide rail; 83. Rack; 84. Connecting arm; 85. Gear; 9. Second push cylinder. Detailed Implementation

[0040] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0041] Example 1

[0042] Please see Figures 1-12The present invention provides a heat treatment apparatus for nanocrystalline glass, including a heating furnace 1, an upper conveyor line 4, a lower conveyor line 5, and a heating system. The heating furnace 1 has an opening on one side as an inlet / outlet 11 and a sealed end on the other side. The upper conveyor line 4 and the lower conveyor line 5 are arranged parallel to each other in the heating furnace 1 along its length, with the upper conveyor line 4 positioned above the lower conveyor line 5. The upper conveyor line 4 is used to convey the glass plate from the inlet / outlet 11 to the sealed end, and the lower conveyor line 5 is used to convey the glass plate from the sealed end to the inlet / outlet 11.

[0043] The upper conveyor line 4 and the lower conveyor line 5 are both formed by an array of conveying rollers arranged along the length of the heating furnace 1. The conveying rollers in the upper conveyor line 4 and the lower conveyor line 5 rotate in opposite directions, thus forming a mechanism of reverse conveying. The driving method and principle of each conveying roller in the upper conveyor line 4 and the lower conveyor line 5 adopt the existing technology, which will not be described in detail in this application.

[0044] In addition, a transfer mechanism 6 is provided on the side of the heating furnace 1 near the sealed end. The glass plate conveyed to the sealed end of the heating furnace 1 by the transfer mechanism 6 can be transferred to the upstream side of the lower conveyor line 5 below. The lower conveyor line 5 then conveys the glass plate to the inlet / outlet 11 side, thereby forming a horizontal U-shaped annealing heat treatment conveying path in the heating furnace 1. This optimizes the traditional straight conveying path by bending and reversing, and the shared inlet / outlet 11 greatly shortens the overall length of the equipment.

[0045] like Figure 1 and Figure 7 As shown, the transfer mechanism 6 includes a drive motor 61, sprockets 63, chains 64, and temporary storage plates 65. Inside the heating furnace 1, on the side away from the inlet / outlet 11 and at locations higher than the upper conveyor line 4 and lower than the lower conveyor line 5, shafts 62 are rotatably mounted. A pair of sprockets 63 are fixedly mounted on each of the two shafts 62. Chains 64 are mounted on the two sprockets 63 on the same side for common transmission. Several temporary storage plates 65 for transferring glass plates from the upper conveyor line 4 to the lower conveyor line 5 are fixedly arrayed on the outer edge of the two chains 64. The drive motor 61 is fixed on the outer wall of the heating furnace 1, and its output shaft is fixedly connected to one end of one of the shafts 62.

[0046] The chain 64 operates in a direction perpendicular to the conveying directions of the upper conveyor line 4 and the lower conveyor line 5, causing the temporary storage plate 65 to move cyclically in the vertical direction.

[0047] When the drive motor 61 works, its output shaft can drive the corresponding shaft 62 to rotate, and drive the two chains 64 to run synchronously, thereby driving each temporary storage plate 65 to run synchronously, so that the temporary storage plate 65 can pass through the upper conveyor line 4 and the lower conveyor line 5 in sequence, so as to transfer the glass plate on the upper conveyor line 4 to the lower conveyor line 5.

[0048] The temporary storage plates 65 are arranged at equal intervals. The distance between two adjacent temporary storage plates 65 is the same as the distance between the upper surfaces of the upper conveyor line 4 and the lower conveyor line 5. When one of the temporary storage plates 65 is close to the upper conveyor line 4 and is flush with the upper conveyor surface of the upper conveyor line 4, the temporary storage plate 65 below it is close to the lower conveyor line 5 and is flush with the upper conveyor surface of the lower conveyor line 5.

[0049] Furthermore, when the sprocket 63 and the temporary storage plate 65 are running, when the temporary storage plate 65 runs to a position close to and level with the downstream side of the upper conveyor line 4, it is convenient for the glass plate on the upper conveyor line 4 to move onto the temporary storage plate 65.

[0050] As chain 64 continues to run, when the temporary storage plate 65 moves to a position close to and level with the upstream side of the lower conveyor line 5, it facilitates the movement of the glass plate on it onto the lower conveyor line 5. At the same time, the temporary storage plate 65 above the temporary storage plate 65 also moves to a position close to and level with the upper conveyor line 4. At this time, it facilitates the transfer of the glass plate on the upper conveyor line 4 to the upper temporary storage plate 65, so that the transfer of the upper and lower glass plates is synchronized and the running sequence matching is high.

[0051] Example 2

[0052] Please see Figure 8 and Figure 9 The difference between this embodiment and Embodiment 1 is that:

[0053] A side box 12 is fixedly connected to the side wall of the heating furnace 1 near the sealing end of the heating furnace 1. A U-shaped seat 7 is provided inside the side box 12. A driving mechanism 8 is provided on the U-shaped seat 7. A push plate B71 is provided on one end of the driving mechanism 8 and a push plate C72 is provided on the other end. The driving mechanism 8 is used to drive the push plate B71 and the push plate C72 to move closer to each other or further away from each other in the length direction of the heating furnace 1.

[0054] like Figure 10 As shown in the figure, the dashed arrows indicate the moving direction of pusher plate B71 and pusher plate C72, and the solid arrows indicate the running direction of chain 64. When the drive mechanism 8 drives pusher plate B71 and pusher plate C72 to move closer to each other, pusher plate B71 can push the glass plate on the upper conveyor line 4 to the temporary storage plate 65, and pusher plate C72 can push the glass plate on the lower temporary storage plate 65 to the lower conveyor line 5, thereby realizing the transfer of glass plates from the upper conveyor line 4 to the lower conveyor line 5.

[0055] like Figure 9 As shown, the drive mechanism 8 includes a drive motor 81, a U-shaped guide rail 82, a rack 83 and a gear 85. The two ends of the U-shaped seat 7 are respectively fixed with U-shaped guide rails 82, and the racks 83 are respectively slidably installed on the side of the two U-shaped guide rails 82 that are close to each other.

[0056] The drive motor 81 is fixed on the U-shaped seat 7, and the gear 85 is fixed on the output shaft end of the drive motor 81. One rack 83 is arranged above the gear 85, and the other rack 83 is arranged below the gear 85. Both racks mesh with the gear 85. The end of one rack 83 is fixedly connected to the push plate B71 through the connecting arm 84, and the other rack 83 is fixedly connected to the push plate C72 through the connecting arm 84.

[0057] The drive motor 81 operates, and its output shaft drives the gear 85 to rotate. The rotating gear 85 can mesh and drive the two racks 83 to move in opposite directions along the corresponding U-shaped guide rails 82. Under the fixed connection of the connecting arm 84, it provides effective drive for the push plate B71 and push plate C72 to push the glass plate and slide reset.

[0058] In addition, by utilizing the meshing drive effect of gear 85 and two racks 83, the movement of push plate B71 and push plate C72 can share the same drive source, reducing the investment in drive cost.

[0059] Example 3

[0060] Please see Figure 1 , Figure 8 and Figure 9 The difference between this embodiment and Embodiment 2 is that:

[0061] A second push cylinder 9 extending along the width direction of the heating furnace 1 is fixed on the outer wall of the side box 12. The telescopic end of the second push cylinder 9 extends through into the side box 12, and the U-shaped seat 7 is fixed on the telescopic end of the second push cylinder 9.

[0062] When the previous glass plate has not been transferred from the lower gear 85 to the lower conveyor line 5, and when the glass plate on the upper conveyor line 4 reaches the transfer area, the second pusher cylinder 9 extends to push the U-shaped seat 7, drive mechanism 8, pusher plate B71, and pusher plate C72 as a whole to feed along the width direction of the heating furnace 1. Figure 8 As shown, at this time, pusher plate B71 moves above the upper conveyor line 4 to push the glass plate on it onto the upper temporary storage plate 65. At the same time, pusher plate C72 moves above the lower temporary storage plate 65 to push the glass plate on the temporary storage plate 65 onto the lower conveyor line 5.

[0063] After the glass plate is pushed and transferred, the drive mechanism 8 drives the pusher plate B71 and pusher plate C72 to move away from each other and reset. At the same time, the second pusher cylinder 9 retracts, which can drive the U-shaped seat 7, drive mechanism 8, pusher plate B71 and pusher plate C72 to move and reset along the width direction of the heating furnace 1 and retract into the side box 12. This prevents pusher plate B71 from staying above the upper conveyor line 4 and pusher plate C72 from staying above the lower temporary storage plate 65, which would affect the normal movement of the glass plate. In the next pushing action, the second pusher cylinder 9 can extend again. This process is repeated to effectively ensure the continuity of glass plate transfer.

[0064] Example 4

[0065] Please see Figure 1 , Figure 2 , Figure 4 , Figure 11 and Figure 12 The difference between this embodiment and Embodiment 3 is as follows:

[0066] A loading and unloading mechanism 2 is provided outside the heating furnace 1 and near the inlet and outlet 11. The loading and unloading mechanism 2 includes a side frame 21 and a main conveyor belt 22. The side frame 21 is located on one side of the heating furnace 1, and the main conveyor belt 22 is located on the side frame 21. The main conveyor belt 22 extends along the width direction of the heating furnace 1. The main conveyor belt 22 has a first conveying section 221 and a second conveying section 222. The first conveying section 221 is located above the second conveying section 222.

[0067] The main conveyor belt 22 has a Z-shaped reversing section 223 located between the first conveying section 221 and the second conveying section 222. A feeding conveyor belt 24 is provided between the first conveying section 221 and the upper conveying line 4 to transfer the glass plate on the first conveying section 221 to the upper conveying line 4. A discharging conveyor belt 25 is provided between the second conveying section 222 and the lower conveying line 5 to transfer the glass plate on the lower conveying line 5 to the second conveying section 222.

[0068] Among them, such as Figure 3 As shown, a first pusher cylinder 211 extending along the length of the heating furnace 1 is fixed on the side of the side frame 21. The telescopic end of the first pusher cylinder 211 extends through to the other side of the side frame 21 and is equipped with a pusher plate A212.

[0069] The first conveying unit 221 transports the glass plate in an orderly manner to the position corresponding to the upper conveying line 4. Then, the first pusher cylinder 211 extends and pushes the pusher plate A212 to move to the side of the upper conveying line 4, which can push the glass plate onto the feeding conveyor belt 24. The feeding conveyor belt 24 then transfers the glass plate onto the upper conveying line 4, thus realizing the feeding of the glass plate.

[0070] When the annealed heat-treated glass plate is conveyed from the lower conveyor line 5 to the inlet / outlet 11, it can move directly to the unloading conveyor belt 25, and then the unloading conveyor belt 25 conveys the glass plate to the second conveyor section 222 to realize the unloading of the glass plate. After that, the second conveyor section 222 conveys the glass plate to the downstream process to realize the continuous transfer of the glass plate.

[0071] In addition, after the first pusher cylinder 211 extends to push the previous glass plate onto the feeding conveyor belt 24, it immediately retracts to reset the pusher plate A212, thus avoiding interference or obstruction to the upper and lower glass plates of the first conveying section 221.

[0072] Secondly, a structure similar to the first pusher cylinder 211 and pusher plate A212 can be set above the unloading conveyor belt 25 to push the glass plate from the unloading conveyor belt 25 to the second conveying section 222 to avoid the glass plate not being transferred to the correct position.

[0073] By designing the main conveyor belt 22 in an irregular form, and setting a bending and reversing guide between the first conveyor section 221 and the second conveyor section 222, the first conveyor section 221 and the second conveyor section 222 are adapted to the loading and unloading processes respectively, thereby ensuring that the loading and unloading share the same conveying mechanism, which not only reduces equipment cost investment, but also further reduces the space occupied by the equipment.

[0074] Example 5

[0075] Please see Figure 5 and Figure 6 The difference between this embodiment and embodiment 4 is that:

[0076] The heating system is arranged along the length of the heating furnace 1. Specifically, the heating system includes heating tubes 3. A middle uniform temperature plate 33 is provided between the upper conveyor line 4 and the lower conveyor line 5 in the heating furnace 1. The middle uniform temperature plate 33 has an inner cavity 331. An upper uniform temperature plate 31 is provided above the upper conveyor line 4 in the heating furnace 1. An upper mounting cavity 311 is formed between the upper uniform temperature plate 31 and the inner top wall of the heating furnace 1. A lower uniform temperature plate 32 is provided below the lower conveyor line 5 in the heating furnace 1. A lower mounting cavity 321 is formed between the lower uniform temperature plate 32 and the inner bottom wall of the heating furnace 1. Several heating tubes 3 are arranged in an array along the length of the heating furnace 1 in the upper mounting cavity 311, the lower mounting cavity 321 and the inner cavity 331.

[0077] Heat is generated by the heating tube 3. The heat generated by the heating tube 3 in the upper mounting cavity 311 is evenly released and transferred downward through the upper heat spreader 31. The heat generated by the heating tube 3 in the inner cavity 331 is evenly released and transferred upward and downward through the middle heat spreader 33. The heat generated by the heating tube 3 in the lower mounting cavity 321 is evenly released and transferred upward through the lower heat spreader 32. In this way, heating channels are formed between the upper heat spreader 31 and the middle heat spreader 33, and between the lower heat spreader 32 and the middle heat spreader 33. The upper conveyor line 4 and the lower conveyor line 5 are respectively arranged in these two heating channels so that the glass plate is continuously heat-treated when the glass plate is conveyed to the closed end of the heating furnace 1 by the upper conveyor line 4 and to the inlet / outlet 11 by the lower conveyor line 5.

[0078] In addition, the glass plates are heated evenly on the upper conveyor line 4 and the lower conveyor line 5 respectively, ensuring consistent heat treatment quality.

[0079] Among them, the heating tube 3 adopts existing technology, and its specific structure and working principle will not be described in detail. The upper heat spreader 31, the lower heat spreader 32 and the middle heat spreader 33 are all made of silicon carbide material, which can make the heat distribution more uniform and effectively reduce the temperature difference between the upper and lower heating channels, so as to improve the annealing quality of nanocrystalline glass products.

[0080] Furthermore, a symmetrical thermal field distribution can be formed between the upper heat spreader 31 and the middle heat spreader 33, and between the middle heat spreader 33 and the lower heat spreader 32, respectively. When the glass plate moves in the two heating channels, the thermal stress difference in the thickness direction of the glass plate is effectively eliminated, making the growth of nanocrystalline phase more uniform. At the same time, it reduces heat loss at the end of the furnace body and is highly matched with the closed-loop conveying path composed of the upper conveying line 4, the lower conveying line 5 and the transfer mechanism 6. In addition, the heat transfer of the middle heat spreader 33 can simultaneously heat the glass plates on the upper conveying line 4 and the lower conveying line 5, resulting in high heat utilization.

[0081] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Therefore, the present invention will not explain the control method and circuit connection in detail.

[0082] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

Claims

1. A heat treatment apparatus for nanocrystalline glass, comprising a heating furnace (1), an upper conveyor line (4), a lower conveyor line (5), and a heating system, characterized in that: The heating furnace (1) has an opening on one side, which serves as an inlet / outlet (11), and a sealed end on the other side; The upper conveyor line (4) and the lower conveyor line (5) are arranged parallel to each other along the length of the heating furnace (1) inside the heating furnace (1), and the upper conveyor line (4) is arranged above the lower conveyor line (5); The upper conveyor line (4) is used to convey the glass plate from the inlet / outlet (11) to the sealed end side, and the lower conveyor line (5) is used to convey the glass plate from the sealed end to the inlet / outlet (11) side. The heating furnace (1) has a transfer mechanism (6) on one side near the sealing end, which is used to transfer the glass plate from the upper conveyor line (4) to the lower conveyor line (5); The heating furnace (1) is provided with a loading and unloading mechanism (2) on the outside and near the inlet and outlet (11) for loading the glass plate to be annealed onto the upper conveyor line (4) and loading and unloading the annealed glass plate from the lower conveyor line (5). The heating system is arranged inside the heating furnace (1) along the length of the heating furnace (1); The transfer mechanism (6) includes a drive motor (61), a sprocket (63), a chain (64), and a temporary storage plate (65). Shafts (62) are rotatably installed on the side of the heating furnace (1) away from the inlet and outlet (11) and above the upper conveyor line (4) and below the lower conveyor line (5). A pair of sprockets (63) are fixedly mounted on both shafts (62); The chain (64) is mounted on both sprockets (63) on the same side for common transmission. Several temporary storage plates (65) for transferring glass plates from the upper conveyor line (4) to the lower conveyor line (5) are fixed in an array on the outer edge wall of the two chains (64). The drive motor (61) is fixed on the outer wall of the heating furnace (1), and the output shaft is fixedly connected to one end of one of the shafts (62); A side box (12) is fixedly connected to the side wall of the heating furnace (1) near the sealed end of the heating furnace (1). The side box (12) is provided with a U-shaped seat (7), and the U-shaped seat (7) is provided with a drive mechanism (8); The drive mechanism (8) has a push plate B (71) on one end and a push plate C (72) on the other end. The driving mechanism (8) is used to drive the pusher plate B (71) and the pusher plate C (72) to move closer to each other or further away from each other in the length direction of the heating furnace (1); When the pusher plate B (71) and the pusher plate C (72) approach each other, the pusher plate B (71) is used to push the glass plate from the upper conveyor line (4) to the temporary storage plate (65), and the pusher plate C (72) is used to push the glass plate from the temporary storage plate (65) to the lower conveyor line (5) to realize the glass plate transfer.

2. The heat treatment apparatus for nanocrystalline glass according to claim 1, characterized in that: The temporary storage plates (65) are arranged at equal intervals; The spacing between two adjacent temporary storage plates (65) is consistent with the spacing between the upper surfaces of the upper conveyor line (4) and the lower conveyor line (5); When one of the temporary storage plates (65) is adjacent to the upper conveyor line (4) and is flush with the upper conveyor surface of the upper conveyor line (4), the temporary storage plate (65) below it is adjacent to the lower conveyor line (5) and is flush with the upper conveyor surface of the lower conveyor line (5).

3. The heat treatment apparatus for nanocrystalline glass according to claim 1, characterized in that: The drive mechanism (8) includes a drive motor (81), a U-shaped guide rail (82), a rack (83) and a gear (85). U-shaped guide rails (82) are fixed to the two ends of the U-shaped seat (7), and racks (83) are respectively installed on the side of the two U-shaped guide rails (82) that are close to each other. The drive motor (81) is fixed on the U-shaped seat (7); The gear (85) is fixed to the end of the output shaft of the drive motor (81); One of the racks (83) is arranged above the gear (85), and the other rack (83) is arranged below the gear (85), and both of them mesh with the gear (85); One of the racks (83) is fixedly connected to the push plate B (71) via a connecting arm (84), and the other rack (83) is fixedly connected to the push plate C (72) via a connecting arm (84).

4. The heat treatment apparatus for nanocrystalline glass according to claim 3, characterized in that: A second push cylinder (9) extending along the width direction of the heating furnace (1) is fixed on the outer wall of the side box (12), and the telescopic end of the second push cylinder (9) extends through into the side box (12); The U-shaped seat (7) is fixed on the telescopic end of the second push cylinder (9).

5. The heat treatment apparatus for nanocrystalline glass according to claim 1, characterized in that: The loading and unloading mechanism (2) includes a side frame (21) and a main conveyor belt (22); The side frame (21) is located on one side of the heating furnace (1), and the main conveyor belt (22) is located on the side frame (21); The main conveyor belt (22) extends along the width direction of the heating furnace (1); The main conveyor belt (22) has a first conveying section (221) and a second conveying section (222); The first conveying section (221) is located above the second conveying section (222), and the main conveyor belt (22) has a Z-shaped reversing section (223) located between the first conveying section (221) and the second conveying section (222). A feeding conveyor belt (24) is provided between the first conveying section (221) and the upper conveying line (4) for transferring the glass plate on the first conveying section (221) to the upper conveying line (4); A feeding conveyor belt (25) is provided between the second conveying section (222) and the lower conveying line (5) for transferring the glass plate on the lower conveying line (5) to the second conveying section (222).

6. The heat treatment apparatus for nanocrystalline glass according to claim 5, characterized in that: The side frame (21) is fixed with a first push cylinder (211) extending along the length of the heating furnace (1). The telescopic end of the first push cylinder (211) extends through to the other side of the side frame (21) and is equipped with a push plate A (212) for pushing the glass plate on the first conveying part (221) onto the feeding conveyor belt (24).

7. The heat treatment apparatus for nanocrystalline glass according to claim 1, characterized in that: The heating system includes a heating element (3); The heating furnace (1) is provided with a medium temperature plate (33) located between the upper conveyor line (4) and the lower conveyor line (5), and the medium temperature plate (33) is provided with an inner cavity (331). An upper heat equalization plate (31) is provided inside the heating furnace (1) above the upper conveyor line (4), and an upper mounting cavity (311) is formed between the upper heat equalization plate (31) and the top wall inside the heating furnace (1). The heating furnace (1) is provided with a lower heat equalization plate (32) located below the lower conveyor line (5), and a lower mounting cavity (321) is formed between the lower heat equalization plate (32) and the bottom wall of the heating furnace (1). Several heating tubes (3) are arranged in an array along the length of the heating furnace (1) in the upper mounting cavity (311), the lower mounting cavity (321) and the inner cavity (331).

8. The heat treatment apparatus for nanocrystalline glass according to claim 1, characterized in that: Both the upper conveyor line (4) and the lower conveyor line (5) are formed by an array of several conveyor rollers arranged along the length of the heating furnace (1); The conveying rollers in the upper conveyor line (4) and the lower conveyor line (5) rotate in opposite directions.

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