Nanometer microcrystalline glass heat treatment device

Abstract

The invention relates to the technical field of glass product annealing, in particular to a nanocrystalline glass heat treatment device which comprises a heating furnace, an upper conveying line, a lower conveying line and a heating system, an opening is formed in one side of the heating furnace and serves as an inlet and outlet, the other side of the heating furnace is a sealed end, and the upper conveying line and the lower conveying line are arranged in the heating furnace in parallel in the length direction of the heating furnace; and the upper conveying line is arranged above the lower conveying line. The upper conveying line and the lower conveying line which are arranged in parallel in the length direction and opposite in rotating direction are arranged in the heating furnace and matched with the transfer mechanism to form a transverse U-shaped annealing heat treatment conveying path, and compared with a traditional linear annealing furnace, the overall length of equipment is greatly shortened, the plant space cost and layout difficulty are reduced, and meanwhile, the production efficiency is improved. The shortened furnace body reduces the energy consumption required for maintaining the temperature of each stage, conforms to the green and energy-saving trend, and shares an inlet and an outlet for feeding and discharging, so that the equipment structure is simplified, and the space utilization efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of glass product annealing, and particularly to a heat treatment device for nano-crystalline glass. Background Art

[0002] Nano-crystalline glass is a new composite material formed by uniformly dispersing nano-scale crystals in a glass matrix. It combines the transparency of glass and the high strength, high hardness, wear resistance, and corrosion resistance of ceramics. By precisely controlling the type, size, and distribution of nano-crystals, it can be customized to meet the performance requirements in multiple fields such as optics, electronics, and machinery, showing broad application prospects in frontier fields such as precision instruments, aerospace, and medical devices.

[0003] During the preparation of nano-crystalline glass, heat treatment is required, especially after forming, annealing treatment is needed, that is, a process of slowly heating and holding the material within a specific temperature range and controlling the cooling rate to eliminate the internal stress generated during the preparation process, promote the uniform growth of nano-crystals in the glass matrix and optimize the microstructure, and at the same time avoid excessive crystal growth and loss of the nano-effect, thereby significantly improving the optical uniformity, mechanical strength, and dimensional stability of the glass.

[0004] Existing nano-crystalline glass is usually annealed using an annealing furnace, which is equipped with a precise heating system inside to provide a stable and uniform annealing temperature field environment for the nano-crystalline glass. Most of the existing annealing furnaces operate in a linear manner, that is, the loading area and the unloading area are respectively located on both sides of the annealing furnace. And to ensure the annealing quality, the furnace body is usually set to be relatively long. The relatively long furnace body occupies a large area, increasing the cost of factory building space and the difficulty of layout. In addition, maintaining the temperature at each stage of the relatively long furnace body requires more energy consumption, which does not conform to the trend of green energy conservation. Summary of the Invention

[0005] The purpose of the present invention is to provide a heat treatment device for nano-crystalline glass to solve the technical problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions.

[0007] A heat treatment device for nano-crystalline glass includes a heating furnace, an upper conveyor line, a lower conveyor line, and a heating system. One side of the heating furnace has an opening as the inlet and outlet, and the other side is a sealed end. The upper conveyor line and the lower conveyor line are arranged in parallel along the length direction of the heating furnace inside the heating furnace, and the upper conveyor line is arranged above the lower conveyor line. The upper conveyor line is used to convey the glass plate from the inlet and outlet to the sealed end side;

[0008] The lower conveyor line is used to convey the glass plate from the sealed end to the side of the inlet and outlet. A transfer mechanism is provided on one side of the heating furnace near the sealed end for transferring the glass plate from the upper conveyor line to the lower conveyor line. An unloading and loading mechanism is provided outside the heating furnace and near the inlet and outlet for loading the glass plate to be annealed onto the upper conveyor line and unloading the annealed glass plate from the lower conveyor line. The heating system is arranged in the heating furnace along the length direction of the heating furnace.

[0009] Preferably, the transfer mechanism includes a driving motor, sprockets, chains and a temporary storage plate. Shaft rods are rotatably installed respectively on one side of the heating furnace far from the inlet and outlet, above the upper conveyor line and below the lower conveyor line. A pair of sprockets are fixedly sleeved on each of the two shaft rods. A chain is commonly driven and sleeved on the two sprockets on the same side. A number of temporary storage plates for transferring the glass plate from the upper conveyor line to the lower conveyor line are fixedly arrayed on the outer edge walls of the two chains. The driving motor is fixed on the outer wall of the heating furnace, and the output shaft is fixedly connected to one end of one of the shaft rods.

[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 surfaces of the upper conveyor line and the lower conveyor line. When one of the temporary storage plates is adjacent to the upper conveyor line and flush with the upper conveying surface of the upper conveyor line, the temporary storage plate below it is adjacent to the lower conveyor line and flush with the upper conveying surface of the lower conveyor line.

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

[0012] Among them, when the push plate B and the push plate C approach each other, the push plate B is used to push the glass plate from the upper conveyor line onto the temporary storage plate, and the push plate C is used to push the glass plate from the temporary storage plate onto the lower conveyor line to realize the transfer of the glass plate.

[0013] Preferably, the driving mechanism includes a driving motor, a U-shaped guide rail, a rack and a gear. U-shaped guide rails are respectively fixed at the two ends of the U-shaped seat. Racks are respectively installed in a limited sliding manner on the sides of the two U-shaped guide rails close to each other. The driving motor is fixed on the U-shaped seat, and the gear is fixed at the end of the output shaft of the driving motor.

[0014] One of the racks is arranged above the gear, and the other rack is arranged below the gear, and both of them are engaged with the gear. One end of one of the racks is fixedly connected to the push plate B through a connecting arm, and the other rack is fixedly connected to the push plate C through a connecting arm.

[0015] Preferably, a second push cylinder extending in the width direction of the heating furnace is fixed on the outer wall of the side box. The telescopic end of the second push cylinder penetrates and extends into the side box, and the U-shaped seat is 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 arranged on one side of the heating furnace, and the main conveyor belt is arranged on the side frame. The main conveyor belt extends in the width direction of the heating furnace. The main conveyor belt has a first conveying part and a second conveying part. The first conveying part is located above the second conveying part. Between the first conveying part and the second conveying part on the main conveyor belt is a Z-shaped reversing part. An upper feeding conveyor belt is provided between the first conveying part and the upper conveying line for transferring the glass plate on the first conveying part to the upper conveying line. A lower feeding conveyor belt is provided between the second conveying part and the lower conveying line for transferring the glass plate on the lower conveying line to the second conveying part.

[0017] Preferably, a first push cylinder extending in the length direction of the heating furnace is fixed on the side part of the side frame. The telescopic end of the first push cylinder penetrates and extends to the other side of the side frame, and a push plate A is installed to push the glass plate on the first conveying part onto the upper feeding conveyor belt.

[0018] Preferably, the heating system includes heating tubes. A middle temperature equalizing plate is arranged between the upper conveying line and the lower conveying line in the heating furnace. An inner cavity is provided in the middle temperature equalizing plate. An upper temperature equalizing plate is arranged above the upper conveying line in the heating furnace. An upper installation cavity is formed between the upper temperature equalizing plate and the inner top wall of the heating furnace. A lower temperature equalizing plate is arranged below the lower conveying line in the heating furnace. A lower installation cavity is formed between the lower temperature equalizing plate and the inner bottom wall of the heating furnace. A number of heating tubes are arranged in an array along the length direction of the heating furnace in the upper installation cavity, the lower installation cavity and the inner cavity.

[0019] Preferably, both the upper conveying line and the lower conveying line are formed by arranging a number of conveying rollers in an array along the length direction of the heating furnace, and the conveying rollers in the upper conveying line and the lower conveying line rotate in opposite directions.

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

[0021] An upper conveying line and a lower conveying line that are arranged in parallel in the length direction and rotate in opposite directions are provided in the heating furnace, and cooperate with the transfer mechanism to form a horizontally placed U-shaped annealing heat treatment conveying path. Compared with the traditional straight annealing furnace, the overall length of the equipment is greatly shortened, the space cost of the workshop and the layout difficulty are reduced. At the same time, the shortened furnace body reduces the energy consumption required to maintain the temperature at each stage, conforms to the trend of green energy conservation, and shares the inlet and outlet for loading and unloading, simplifies the equipment structure, and improves the space utilization efficiency.

[0022] With the help of a driving motor to drive the shaft to rotate, the sprocket, chain and temporary storage plate are driven to operate synchronously, so that the glass plates on the upper conveyor line can be transferred to the lower conveyor line in sequence. The temporary storage plates are arranged at equal distances and the spacing is consistent with the spacing between the upper and lower surfaces of the upper and lower conveyor lines, ensuring that the temporary storage plates are flush with the conveying surfaces of the upper and lower conveyor lines, so that the upper and lower glass plates can be transferred synchronously, with a high degree of matching in the operating sequence, ensuring the stability of the glass plates during the transfer process.

[0023] The driving mechanism drives the gear to rotate through the driving motor, and the meshing drives the two racks to move in opposite directions, thereby driving the push plate B and the push plate C to move closer to or farther from each other in the length direction of the heating furnace, so as to push 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 uses the same driving source to achieve two-way pushing, reducing driving costs, and the second pushing cylinder can push the U-shaped seat as a whole to feed and reset along the width direction of the heating furnace, avoiding the pushing components from affecting the normal movement of the glass plate, ensuring the continuity and accuracy of the transfer process, and effectively improving the efficiency and reliability of glass plate transfer.

[0025] The first conveying section and the second conveying section of the main conveyor belt are connected by the Z-shaped reversing section, and cooperate with the loading conveyor belt and the unloading conveyor belt to realize the loading of the glass plate to be annealed to the upper conveyor line and the unloading of the glass plate after annealing. The design of the special-shaped conveying mechanism enables the loading and unloading to share the same conveying mechanism, which not only reduces the equipment cost investment, but also further reduces the space occupied by the equipment, and improves the automation degree and process continuity of loading and unloading.

[0026] Symmetrical heat field distributions can be formed between the upper and middle temperature-averaging plates, and between the middle and lower temperature-averaging plates respectively. When the glass plate moves in the two heating channels, the thermal stress difference in the thickness direction of the glass plate can be effectively eliminated, making the nanocrystalline phase grow more evenly, while reducing heat loss at the end of the furnace body, and highly matching the closed-loop conveying path composed of the upper conveyor line, the lower conveyor line and the transfer mechanism. In addition, the heat transfer of the middle temperature-averaging plate can heat the glass plates on the upper and lower conveyor lines at the same time, with high heat utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0028] Figure 2 for Figure 1 A schematic diagram of another viewing angle of the structure shown;

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

[0030] Figure 4 for Figure 1 The structure shown omits the schematic diagram of the heating furnace;

[0031] Figure 5 is Figure 1 the structural sectional view shown

[0032] Figure 6 is Figure 5 the enlarged view of the structure at position B in

[0033] Figure 7 the structural view of the transfer mechanism in the present invention

[0034] Figure 8 the installation view of the U-shaped seat structure in the present invention

[0035] Figure 9 the structural view of the driving mechanism in the present invention

[0036] Figure 10 is the schematic view of the transfer of glass from the upper conveyor line to the lower conveyor line

[0037] Figure 11 is the schematic view of the cooperation between the loading and unloading mechanism and the upper and lower conveyor lines in the present invention

[0038] Figure 12 is the structural view of the conveyor belt in the present invention

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

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

[0041] Embodiment 1

[0042] Please refer to Figure 1 - Figure 12, the present invention provides a heat treatment device for nano-crystalline glass, including a heating furnace 1, an upper conveyor line 4, a lower conveyor line 5 and a heating system. One side of the heating furnace 1 has an opening as the inlet / outlet 11, and the other side is a sealed end. The upper conveyor line 4 and the lower conveyor line 5 are arranged in parallel along the length direction 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.

[0043] Among them, both the upper conveyor line 4 and the lower conveyor line 5 are formed by arranging a number of conveyor rollers in an array along the length direction of the heating furnace 1. The conveyor rollers in the upper conveyor line 4 and the lower conveyor line 5 rotate in opposite directions, thus forming a mechanism of upward and downward reverse conveyance. The driving methods and principles of the conveyor rollers in the upper conveyor line 4 and the lower conveyor line 5 adopt the prior art, and will not be elaborated in detail in this application.

[0044] In addition, a transfer mechanism 6 is provided on one side of the heating furnace 1 close to the sealed end. Through the transfer mechanism 6, the glass plate conveyed to the sealed end of the heating furnace 1 by the upper conveyor line 4 can be transferred to the upstream side of the lower conveyor line 5 below, and the glass plate is conveyed to the inlet / outlet 11 side by the lower conveyor line 5. Thus, a horizontally placed U-shaped annealing heat treatment conveying path is formed in the heating furnace 1, optimizing the traditional linear conveying path by bending and changing the direction, and sharing the inlet / outlet 11 for loading and unloading, greatly shortening the overall length of the equipment.

[0045] As Figure 1 and Figure 7 shown, the transfer mechanism 6 includes a driving motor 61, a sprocket 63, a chain 64 and a temporary storage plate 65. Shaft rods 62 are rotatably installed on one side of the heating furnace 1 far from the inlet / outlet 11 and above the upper conveyor line 4 and below the lower conveyor line 5 respectively. A pair of sprockets 63 are fixedly sleeved on both shaft rods 62. A chain 64 is commonly driven and sleeved on the two sprockets 63 on the same side. A number of temporary storage plates 65 for transferring the glass plate from the upper conveyor line 4 to the lower conveyor line 5 are fixedly arranged in an array on the outer edge walls of the two chains 64. The driving 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 shaft rods 62.

[0046] Among them, the running direction of the chain 64 is perpendicular to the conveying directions of the upper conveyor line 4 and the lower conveyor line 5, so that the temporary storage plate 65 moves cyclically in the vertical direction.

[0047] By the operation of the driving motor 61, its output shaft can drive the corresponding shaft rod 62 to rotate, and drive the two chains 64 to run synchronously, and then drive each temporary storage plate 65 to run synchronously, so that each temporary storage plate 65 can sequentially pass through the upper conveyor line 4 and the lower conveyor line 5, in order to transfer the glass plate on the upper conveyor line 4 to the lower conveyor line 5.

[0048] Among them, the temporary storage plates 65 are arranged at equal intervals, and 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 adjacent to the upper conveyor line 4 and flush with the upper conveying surface of the upper conveyor line 4, the temporary storage plate 65 below it is adjacent to the lower conveyor line 5 and flush with the upper conveying 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 be adjacent to and flush 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 this temporary storage plate 65;

[0050] As the chain 64 continues to run, when this temporary storage plate 65 moves to be adjacent to and flush with the upstream side of the lower conveyor line 5, it is convenient for the glass plate on it to move onto the lower conveyor line 5, and at the same time, the temporary storage plate 65 above this temporary storage plate 65 also runs to a position adjacent to and flush with the upper conveyor line 4. At this time, it is convenient for the glass plate on the upper conveyor line 4 to be transferred onto the temporary storage plate 65 above, so that the loading and unloading of the upper and lower glass plates are carried out synchronously, and the matching degree of the operation time sequence is high.

[0051] Embodiment 2

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

[0053] On the side wall of the heating furnace 1, a side box 12 is fixedly connected and fixed near the sealed end of the heating furnace 1. A U-shaped seat 7 is arranged in the side box 12. A driving mechanism 8 is arranged on the U-shaped seat 7. One end of the driving mechanism 8 is provided with a push plate B71, and the other end is provided with a push plate C72. The driving mechanism 8 is used to drive the push plate B71 and the push plate C72 to approach or move away from each other in the length direction of the heating furnace 1;

[0054] As Figure 10 shown, among them, the dotted arrows in the figure are the moving directions of the push plate B71 and the push plate C72, and the solid arrows are the running direction of the chain 64. When the driving mechanism 8 works to drive the push plate B71 and the push plate C72 to approach each other, the push plate B71 can push the glass plate on the upper conveyor line 4 onto the temporary storage plate 65, and the push plate C72 can push the glass plate on the lower temporary storage plate 65 onto the lower conveyor line 5, thereby realizing the transfer of the glass plate from the upper conveyor line 4 to the lower conveyor line 5.

[0055] As Figure 9 shown, the driving mechanism 8 includes a driving 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 racks 83 are respectively installed in a limited sliding manner on the sides of the two U-shaped guide rails 82 close to each other;

[0056] The driving motor 81 is fixed on the U-shaped seat 7, and the gear 85 is fixed on the end of the output shaft of the driving 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 are engaged with the gear 85. One end of the 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] By the operation of the driving motor 81, its output shaft drives the gear 85 to rotate. The rotating gear 85 can engage 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 can effectively drive the push plate B71 and the push plate C72 to push the glass plate and slide back and forth;

[0058] In addition, by using the meshing driving effect of the gear 85 and the two racks 83, the movement of the push plate B71 and the push plate C72 shares the same driving source, reducing the input of the driving cost.

[0059] Embodiment 3

[0060] Please refer to Figure 1 、 Figure 8 and Figure 9 This embodiment is different from Embodiment 2 in 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 penetrates and extends 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 below the gear 85 to the lower conveyor line 5 and the glass plate on the upper conveyor line 4 reaches the transfer area, by the extension of the second push cylinder 9, it pushes the U-shaped seat 7, the driving mechanism 8, the push plate B71 and the push plate C72 as a whole to feed along the width direction of the heating furnace 1. As shown in Figure 8 , at this time, the push 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, the push plate C72 moves above the lower temporary storage plate 65 to push the glass plate on this temporary storage plate 65 onto the lower conveyor line 5;

[0063] After the glass plate is pushed and transferred, the driving mechanism 8 operates to drive the push plate B71 and the push plate C72 to move away from each other for reset. At the same time, the second push cylinder 9 retracts, which can drive the U-shaped seat 7, the driving mechanism 8, the push plate B71 and the push plate C72 as a whole to move and reset along the width direction of the heating furnace 1 and retract into the side box 12, avoiding the push plate B71 staying above the upper conveyor line 4 and the push plate C72 staying above the lower temporary storage plate 65 and affecting the normal movement of the glass plate. When the next pushing action is performed, the second push cylinder 9 extends again, and so on, effectively ensuring the continuity of the glass plate transfer.

[0064] Example 4

[0065] Please refer to Figure 1 、 Figure 2 、 Figure 4 、 Figure 11 and Figure 12 The difference between this example and Example 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 provided on one side of the heating furnace 1, and the main conveyor belt 22 is arranged 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 portion 221 and a second conveying portion 222, and the first conveying portion 221 is located above the second conveying portion 222;

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

[0068] Among them, as Figure 3 shown, a first push cylinder 211 extending along the length direction of the heating furnace 1 is fixed to the side portion of the side frame 21. The telescopic end of the first push cylinder 211 penetrates through and extends to the other side of the side frame 21, and a push plate A212 is installed.

[0069] The glass plate is orderly conveyed and transferred by the first conveying portion 221 to the position corresponding to the upper conveying line 4. Subsequently, the first push cylinder 211 extends to work, and the push plate A212 is pushed to move toward the upper conveying line 4, so that the glass plate can be pushed onto the upper feeding conveyor belt 24, and then the glass plate is transferred to the upper conveying line 4 by the upper feeding conveyor belt 24, realizing the loading of the glass plate;

[0070] When the glass plate after annealing heat treatment is conveyed to the inlet and outlet 11 by the lower conveying line 5, it can be directly moved onto the blanking conveyor belt 25, and then the glass plate is conveyed to the second conveying portion 222 by the blanking conveyor belt 25, realizing the blanking of the glass plate. After that, the glass plate is conveyed to the downstream process by the second conveying portion 222, realizing the continuous transfer of the glass plate;

[0071] In addition, when the first push cylinder 211 extends to push the previous glass plate onto the upper feeding conveyor belt 24, it immediately retracts to drive the push plate A212 to reset, avoiding interference and blocking of the next glass plate on the first conveying portion 221.

[0072] Secondly, a structure similar to the first push cylinder 211 and the push plate A212 can be provided above the blanking conveyor belt 25 to push the glass plate from the blanking conveyor belt 25 onto the second conveying part 222, preventing the glass plate from being transferred incompletely.

[0073] By designing the main conveyor belt 22 in a special shape and arranging it for bending and reversing guidance between the first conveying part 221 and the second conveying part 222, the first conveying part 221 and the second conveying part 222 are adapted to the feeding and blanking processes respectively, thereby ensuring that the same conveying mechanism is shared for feeding and blanking, not only reducing the equipment cost investment but also further reducing the space occupied by the equipment.

[0074] Embodiment 5

[0075] Please refer to Figure 5 and Figure 6 The difference between this embodiment and Embodiment 4 is as follows:

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

[0077] Heat can be generated by the operation of the heating tubes 3. The heat generated by the heating tubes 3 in the upper installation cavity 311 is evenly released and transmitted downward through the upper temperature equalizing plate 31. The heat generated by the heating tubes 3 in the inner cavity 331 is evenly released and transmitted to the upper and lower sides through the middle temperature equalizing plate 33. The heat generated by the heating tubes 3 in the lower installation cavity 321 is evenly released and transmitted upward through the lower temperature equalizing plate 32. In this way, heating channels are formed between the upper temperature equalizing plate 31 and the middle temperature equalizing plate 33 and between the lower temperature equalizing plate 32 and the middle temperature equalizing plate 33 respectively. The upper conveyor line 4 and the lower conveyor line 5 are respectively arranged in these two heating channels, so as to continuously perform heat treatment on the glass plate when the glass plate is conveyed by the upper conveyor line 4 to the closed end side of the heating furnace 1 and when the glass plate is conveyed by the lower conveyor line 5 to the inlet / outlet 11 side.

[0078] In addition, when the glass plate moves on the upper conveyor line 4 and the lower conveyor line 5 respectively, it is evenly heated up and down, ensuring consistent heat treatment quality.

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

[0080] In addition, a symmetric heat field distribution can be formed respectively between the upper isothermal plate 31 and the middle isothermal plate 33, and between the middle isothermal plate 33 and the lower isothermal plate 32. When the glass plate moves in the two heating channels, the thermal stress difference in the thickness direction of the glass plate can be effectively eliminated, making the growth of the nano-crystalline phase more uniform. At the same time, the heat loss at the end of the furnace body is reduced, and it highly matches 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 isothermal plate 33 up and down can supply heat to the glass plates on the upper conveying line 4 and the lower conveying line 5 at the same time, with high heat utilization rate.

[0081] The control mode of the present invention is automatically controlled by a controller. The control circuit of the controller can be realized by simple programming by those skilled in the art. The provision of power also belongs to the common knowledge in the art. Therefore, the control mode and circuit connection of the present invention will not be elaborated in detail.

[0082] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

Claims

1. A heat treatment device for nano-crystalline glass, comprising a heating furnace (1), an upper conveyor line (4), a lower conveyor line (5) and a heating system, characterized in that: One side of the heating furnace (1) has an opening as an inlet / outlet (11), and the other side is a sealed end; The upper conveyor line (4) and the lower conveyor line (5) are arranged in parallel along the length direction 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; A transfer mechanism (6) is provided on one side of the heating furnace (1) near the sealed end for transferring the glass plate from the upper conveyor line (4) to the lower conveyor line (5); An upper and lower loading mechanism (2) is provided outside the heating furnace (1) and near the inlet / outlet (11) for loading the glass plate to be annealed onto the upper conveyor line (4) 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 direction of the heating furnace (1).

2. The heat treatment device for nano-crystalline glass according to claim 1, characterized in that: The transfer mechanism (6) includes a driving motor (61), a sprocket (63), a chain (64) and a temporary storage plate (65); Shaft rods (62) are respectively rotatably installed on one side of the heating furnace (1) far from the inlet / outlet (11), above the upper conveyor line (4) and below the lower conveyor line (5); A pair of sprockets (63) are fixedly sleeved on both of the shaft rods (62); The chain (64) is commonly driven and sleeved on the two sprockets (63) on the same side; A plurality of temporary storage plates (65) for transferring the glass plate from the upper conveyor line (4) to the lower conveyor line (5) are fixedly arrayed on the outer edge walls of the two chains (64); The driving 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 shaft rods (62).

3. The heat treatment device for nano-crystalline glass according to claim 2, characterized in that: 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 adjacent to the upper conveyor line (4) and is flush with the upper conveying 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 conveying surface of the lower conveyor line (5).

4. The heat treatment device for nano-crystalline glass according to claim 2, characterized in that: A side box (12) is fixedly connected in a communicating manner on the side wall of the heating furnace (1) near the sealed end side of the heating furnace (1); A U-shaped seat (7) is provided in the side box (12), and a driving mechanism (8) is provided on the U-shaped seat (7); One end of the driving mechanism (8) is provided with a push plate B (71), and the other end is provided with a push plate C (72). The driving mechanism (8) is used to drive the push plate B (71) and the push plate C (72) to approach or move away from each other in the length direction of the heating furnace (1). When the push plate B (71) and the push plate C (72) approach each other, the push plate B (71) is used to push the glass plate from the upper conveying line (4) onto the temporary storage plate (65), and the push plate C (72) is used to push the glass plate from the temporary storage plate (65) onto the lower conveying line (5) to realize the transfer of the glass plate.

5. A nano-crystalline glass heat treatment device according to claim 4, characterized in that: The driving mechanism (8) includes a driving motor (81), a U-shaped guide rail (82), a rack (83) and a gear (85). U-shaped guide rails (82) are respectively fixed on two ends of the U-shaped seat (7), and racks (83) are respectively installed on one side of the two U-shaped guide rails (82) close to each other in a limited sliding manner. The driving motor (81) is fixed on the U-shaped seat (7). The gear (85) is fixed on the end of the output shaft of the driving 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 are engaged with the gear (85). One end of one of the racks (83) is fixedly connected to the push plate B (71) through a connecting arm (84), and the other rack (83) is fixedly connected to the push plate C (72) through a connecting arm (84).

6. A nano-crystalline glass heat treatment device according to claim 5, characterized in that: A second push cylinder (9) extending in 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) penetrates and extends into the side box (12). The U-shaped seat (7) is fixed on the telescopic end of the second push cylinder (9).

7. A nano-crystalline glass heat treatment device 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 arranged on one side of the heating furnace (1), and the main conveyor belt (22) is arranged on the side frame (21). The main conveyor belt (22) extends in the width direction of the heating furnace (1). The main conveyor belt (22) has a first conveying part (221) and a second conveying part (222). The first conveying part (221) is located above the second conveying part (222), and a Z-shaped reversing part (223) is arranged between the first conveying part (221) and the second conveying part (222) on the main conveyor belt (22). An upper feeding conveyor belt (24) is arranged between the first conveying part (221) and the upper conveying line (4) for transferring the glass plate on the first conveying part (221) to the upper conveying line (4). A blanking conveyor belt (25) is provided between the second conveying part (222) and the lower conveying line (5) for transferring the glass plate on the lower conveying line (5) to the second conveying part (222).

8. A nano-crystalline glass heat treatment device according to claim 7, characterized in that: A first push cylinder (211) extending along the length direction of the heating furnace (1) is fixed to the side part of the side frame (21); The telescopic end of the first push cylinder (211) penetrates through to the other side of the side frame (21) and is provided with a push plate A (212) for pushing the glass plate on the first conveying part (221) onto the loading conveyor belt (24).

9. A nano-crystalline glass heat treatment device according to claim 1, characterized in that: The heating system includes heating tubes (3); A middle temperature equalizing plate (33) is provided between the upper conveying line (4) and the lower conveying line (5) in the heating furnace (1), and an inner cavity (331) is provided in the middle temperature equalizing plate (33); An upper temperature equalizing plate (31) is provided above the upper conveying line (4) in the heating furnace (1), and an upper installation cavity (311) is formed between the upper temperature equalizing plate (31) and the inner top wall of the heating furnace (1); A lower temperature equalizing plate (32) is provided below the lower conveying line (5) in the heating furnace (1), and a lower installation cavity (321) is formed between the lower temperature equalizing plate (32) and the inner bottom wall of the heating furnace (1); A plurality of the heating tubes (3) are arranged in an array along the length direction of the heating furnace (1) in the upper installation cavity (311), the lower installation cavity (321) and the inner cavity (331).

10. A nano-crystalline glass heat treatment device according to claim 1, characterized in that: Both the upper conveying line (4) and the lower conveying line (5) are formed by arranging a plurality of conveying rollers in an array along the length direction of the heating furnace (1); The conveying rollers in the upper conveying line (4) and the lower conveying line (5) rotate in opposite directions.

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