Mini LED backboard glass annealing kiln

Abstract

The invention discloses a Mini LED backboard glass annealing kiln, and relates to the technical field of annealing kilns. The upper air injection mechanism and the lower air injection mechanism are adopted to inject heated compressed air to the upper surface and the lower surface of the glass plate, on one hand, the glass plate can be pneumatically supported to replace traditional roller way supporting, glass surface scratches caused in the annealing process can be effectively reduced, and the yield is greatly increased; on the other hand, hot air is reasonably utilized to replace existing electric heating and cooling air to control the temperature in the kiln, and the stability of the temperature system in the annealing kiln is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of annealing furnaces, and in particular to a Mini LED back panel glass annealing furnace. Background Art

[0002] During the molding process of Mini LED backplane glass, the raw materials are first melted at high temperature in a kiln, and the molten glass then flows into a tin bath. The surface tension of the tin liquid in the tin bath allows the glass liquid to be evenly spread out and a smooth glass plate is formed through a polishing process. This process is crucial to ensuring the flatness and smoothness of the glass plate.

[0003] After forming, the high-temperature glass plate is still in a state of thermal stress. It needs to be gradually cooled down by annealing to eliminate internal stress and improve the mechanical strength and stability of the glass plate. The annealing process is usually carried out in an annealing kiln. At present, ceramic rollers are generally used in annealing kilns to support the glass ribbon and drive it to the rear of the production line through the rotation of the ceramic rollers. However, in this process, since the lower surface of the glass ribbon is a tin-coated surface and is relatively fragile, the ceramic rollers will scratch the lower surface of the glass ribbon when rotating, resulting in the quality of the finished glass plate not meeting the standards. In severe cases, the glass plate may also be defective or even broken, reducing the yield rate of the product. This not only increases production costs, but may also affect the performance and quality of the final product, which has a great impact on production. In addition, the temperature control in the annealing kiln is very critical and needs to be cooled accurately according to the annealing curve. At present, in the process of the glass ribbon passing through the annealing kiln, electric heating and cooling air are usually used to control the temperature in the kiln so that the cooling is in line with the annealing curve, but this method has the problem of unstable temperature control, which affects the annealing effect of the glass plate.

[0004] Therefore, how to prevent the glass sheet from being scratched by the rollers in the annealing furnace and how to heat the annealing furnace more stably are problems that need to be solved urgently. Summary of the invention

[0005] The technical problem to be solved by the present invention is: to overcome the shortcomings of the prior art and provide a Mini LED backplane glass annealing furnace, which adopts an upper jet mechanism and a lower jet mechanism to spray heated compressed air onto the upper and lower surfaces of the glass plate. On the one hand, the glass plate can be lifted by pneumatic force to replace the traditional roller support, which can effectively reduce the scratches on the glass surface caused by the annealing process and greatly improve the yield; on the other hand, the hot air is reasonably used to replace the existing electric heating and cooling air to control the temperature in the kiln, which is conducive to the stability of the temperature system inside the annealing furnace.

[0006] The technical solution of the present invention is: The Mini LED back panel glass annealing furnace comprises a plurality of annealing units connected in sequence, wherein the annealing unit comprises a shell, wherein an upper jet mechanism and a lower jet mechanism are arranged in the shell, and a glass plate transmission mechanism is arranged between the upper jet mechanism and the lower jet mechanism and on both sides of the width direction of the glass plate; the upper jet mechanism and the lower jet mechanism are respectively connected to an upper heating gas tank and a lower heating gas tank through an upper jet main pipe and a lower jet main pipe, respectively, and the upper heating gas tank and the lower heating gas tank are respectively connected to an upper air compressor and a lower air compressor through a compressed air pipe, respectively, and the upper heating gas tank and the lower heating gas tank are respectively provided with a heating mechanism, and a temperature detection mechanism is respectively arranged on the upper jet mechanism and the lower jet mechanism; the glass plate transmission mechanism comprises an upper driving roller and a lower driving roller, and the two sides of the glass plate are clamped between the upper driving roller and the lower driving roller on both sides, and the upper driving roller and the lower driving roller are respectively driven by an upper driving roller motor and a lower driving roller. Roller motor drive; a driving roller base is arranged below the upper driving roller motor and the lower driving roller motor, and an upper driving roller advance and retreat screw and a lower driving roller advance and retreat screw are arranged in the driving roller base, and the upper driving roller advance and retreat screw and the lower driving roller advance and retreat screw are driven by the upper driving roller advance and retreat motor and the lower driving roller advance and retreat motor respectively; the upper driving roller advance and retreat screw and the lower driving roller advance and retreat screw are connected with the upper driving roller lifting frame and the lower driving roller lifting frame respectively, and the upper driving roller lifting screw and the lower driving roller lifting screw are arranged on the upper driving roller lifting frame and the lower driving roller lifting frame respectively, and the upper driving roller lifting screw and the lower driving roller lifting screw are driven by the upper driving roller lifting motor and the lower driving roller lifting motor respectively, and the upper driving roller lifting screw and the lower driving roller lifting screw are connected with the upper driving roller lifting seat and the lower driving roller lifting seat respectively, and the upper driving roller motor and the lower driving roller motor are arranged on the upper driving roller lifting seat and the lower driving roller lifting seat respectively.

[0007] Preferably, the upper jet mechanism and the lower jet mechanism both include a jet main board, on which a plurality of rows of nozzles are arranged along the glass sheet transmission direction, and the nozzles of the upper jet mechanism and the lower jet mechanism are respectively connected to the upper jet main pipe and the lower jet main pipe.

[0008] Preferably, pressure regulating valves are respectively provided at the connection points between the two rows of nozzles located on both sides in the width direction of the glass sheet and the upper and lower air-injection main pipes.

[0009] Preferably, the upper drive roller lifting frame and the lower drive roller lifting frame are respectively provided with an upper drive roller lifting guide rod and a lower drive roller lifting guide rod, and the upper drive roller lifting seat and the lower drive roller lifting seat are respectively arranged on the upper drive roller lifting guide rod and the lower drive roller lifting guide rod through an upper drive roller lifting guide sleeve and a lower drive roller lifting guide sleeve.

[0010] Preferably, the upper jet mechanism and the lower jet mechanism are respectively connected with an upper jet mechanism lifting screw and a lower jet mechanism lifting screw, which are respectively driven by an upper jet mechanism lifting motor and a lower jet mechanism lifting motor; the upper jet main pipe and the lower jet main pipe are respectively provided with a retractable metal pipe section.

[0011] Preferably, the upper jet mechanism and the lower jet mechanism are connected to an upper jet mechanism lifting guide rod and a lower jet mechanism lifting guide rod through an upper jet mechanism lifting guide sleeve and a lower jet mechanism lifting guide sleeve, respectively.

[0012] Preferably, the upper heating gas storage tank and the lower heating gas storage tank are respectively connected to the upper buffer tank and the lower buffer tank through pipelines, and the upper buffer tank and the lower buffer tank are respectively connected to the upper jet main pipe and the lower jet main pipe; the upper buffer tank and the lower buffer tank are respectively provided with heaters.

[0013] Preferably, pressure regulating valves are respectively provided on the pipeline between the upper heating gas storage tank and the upper buffer tank, and on the pipeline between the lower heating gas storage tank and the lower buffer tank.

[0014] Preferably, the annealing unit is divided into a front zone and a rear zone along the glass sheet transmission direction, and the front zone and the rear zone are independently provided with an upper jet mechanism, a lower jet mechanism, a glass sheet transmission mechanism, a temperature detection mechanism, an upper buffer tank and a lower buffer tank.

[0015] Preferably, an upper drive roller advance and retreat guide rod and a lower drive roller advance and retreat guide rod are provided in the drive roller base, and the upper drive roller motor and the lower drive roller motor are respectively provided on the upper drive roller advance and retreat guide rod and the lower drive roller advance and retreat guide rod through the upper drive roller advance and retreat guide sleeve and the lower drive roller advance and retreat guide sleeve.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The annealing furnace of the present invention uses an upper jet mechanism and a lower jet mechanism to spray heated compressed air onto the upper and lower surfaces of the glass plate. On the one hand, the glass plate can be lifted by pneumatic force to replace the traditional roller support, which can effectively reduce the scratches on the glass surface caused by the annealing process and greatly improve the yield rate; on the other hand, the hot air is reasonably used to replace the existing electric heating and cooling air to control the temperature in the kiln, which is conducive to the stability of the temperature system inside the annealing furnace. At the same time, the use of pneumatic force to lift the glass plate to replace the traditional roller support can also greatly reduce the number of rollers and reduce the maintenance and repair costs of the annealing furnace rollers. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of the Mini LED back panel glass annealing furnace of the present invention.

[0018] Figure 2 yes Figure 1 A partial enlarged view at point A.

[0019] Figure 3 It is a top view of the Mini LED back panel glass annealing furnace of the present invention.

[0020] Figure 4 It is a side view of the Mini LED back panel glass annealing furnace of the present invention.

[0021] Figure 5 It is a structural schematic diagram of the upper jet mechanism of the present invention.

[0022] Figure 6 It is a structural schematic diagram of the lower jet mechanism of the present invention.

[0023] In the figure, 1, shell; 101, front area; 102, rear area; 201, upper jet mechanism; 202, lower jet mechanism; 3, glass plate; 401, upper jet main pipe; 402, lower jet main pipe; 403, jet branch pipe; 404, jet branch pipe; 405, telescopic metal pipe section; 501, upper heating gas storage tank; 502, lower heating gas storage tank; 503, compressed air pipe; 504, upper air compressor; 505, lower air compressor; 506, upper buffer tank; 507, lower buffer tank; 508, heater; 6, temperature detection mechanism; 701, upper drive roller; 702, lower drive roller; 703, upper drive roller motor; 704, lower drive roller motor; 8, drive roller base; 901, upper drive roller advance and retreat screw; 902, lower drive roller advance and retreat screw; 903, upper drive roller advance and retreat motor; 9 04, lower drive roller advance and retreat motor; 905, upper drive roller advance and retreat guide rod; 906, lower drive roller advance and retreat guide rod; 907, lower drive roller advance and retreat guide sleeve; 1001, upper drive roller lifting frame; 1002, lower drive roller lifting frame; 1003, lower drive roller lifting screw; 1004, upper drive roller lifting motor; 1005, lower drive roller lifting motor; 1006, upper drive roller lifting seat; 1007, lower drive roller lifting seat; 1008, lower drive roller lifting guide rod; 1009, lower drive roller lifting guide sleeve; 11, nozzle; 12, pressure regulating valve; 1301, upper jet mechanism lifting screw; 1302, lower jet mechanism lifting screw; 1303, upper jet mechanism lifting motor; 1304, lower jet mechanism lifting motor; 1305, upper jet mechanism lifting guide rod; 1306, lower jet mechanism lifting guide rod. DETAILED DESCRIPTION

[0024] In order to enable persons skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention.

[0025] Example 1 This embodiment provides a Mini LED back panel glass annealing furnace, including a plurality of annealing units connected in sequence. The entire annealing furnace can be provided with a multi-stage annealing unit combination according to process requirements to achieve annealing temperature requirements.

[0026] Among them, Figure 3 As shown, the annealing unit includes a housing 1, which is divided into a front zone 101 and a rear zone 102 along the transmission direction of the glass sheet 3. The temperature of the front zone 101 is set slightly higher than that of the rear zone 102 to meet the annealing temperature requirements. Figure 1 As shown, an upper jet mechanism 201 and a lower jet mechanism 202 are respectively arranged in the front zone 101 and the rear zone 102, and a glass plate 3 transmission mechanism is respectively arranged between the upper jet mechanism 201 and the lower jet mechanism 202 and on both sides of the width direction of the glass plate 3, wherein the upper jet mechanism 201 and the lower jet mechanism 202 respectively spray the glass plate 3, on the one hand, the sprayed gas can play a role in supporting the glass plate 3, and on the other hand, the annealing temperature requirements of the front zone 101 and the rear zone 102 can be met by the sprayed hot gas; and the glass plate 3 transmission mechanism is used to transport the glass plate 3.

[0027] Specifically, Figure 1 , 5 -6, the upper jet mechanism 201 and the lower jet mechanism 202 both include a jet main board, on which a plurality of jet branch pipes 403 are arranged at intervals along the width direction of the glass plate 3, and a plurality of nozzles 11 are arranged on the jet branch pipes 403 along the length direction, so that a plurality of rows of nozzles 11 are arranged on the jet main board along the transmission direction of the glass plate 3, the nozzles 11 of the upper jet mechanism 201 face downward, and the nozzles 11 of the lower jet mechanism 202 face upward. The plurality of jet branch pipes 403 of the front zone 101 and the rear zone 102 are respectively connected to the jet branch pipes 404, and the jet branch pipes 404 of the upper jet mechanism 201 and the lower jet mechanism 202 are respectively connected to the upper jet main pipe 401 and the lower jet main pipe 402; the upper jet main pipe 401 and the lower jet main pipe 402 are respectively connected to the upper buffer tank 506 and the lower buffer tank 507, and the upper buffer tank 506 and the lower buffer tank 507 are respectively provided with heaters 508 (electric heating rods can be used); as shown in FIG. Figure 3 As shown, the upper buffer tank 506 and the lower buffer tank 507 are connected to the upper heating gas tank 501 and the lower heating gas tank 502 through pipelines, respectively. The pipeline between the upper heating gas tank 501 and the upper buffer tank 506 and the pipeline between the lower heating gas tank 502 and the lower buffer tank 507 are respectively provided with a pressure regulating valve 12; the upper heating gas tank 501 and the lower heating gas tank 502 are respectively connected to the upper air compressor 504 and the lower air compressor 505 through a compressed air pipe 503, and the upper heating gas tank 501 and the lower heating gas tank 502 are respectively provided with a heating mechanism (an electric heating rod can be used), such as Figure 1As shown, the upper jet mechanism 201 and the lower jet mechanism 202 are respectively provided with a temperature detection mechanism 6, and the temperature detection mechanism 6 can adopt an existing device, such as a thermocouple.

[0028] During operation, the compressed air generated by the upper air compressor 504 and the lower air compressor 505 enters the upper heating air storage tank 501 and the lower heating air storage tank 502 through the compressed air pipe 503. The heating mechanism heats the internal compressed air to a certain temperature and then enters the upper buffer tank 506 and the lower buffer tank 507 of the front zone 101 and the rear zone 102 respectively. The pressure of the compressed air in each zone is adjusted by the pressure regulating valve 12, and the compressed air in the upper buffer tank 506 and the lower buffer tank 507 can be further heated by the heater 508, so that the temperature detected by the thermocouple meets the process requirements. The hot compressed air from the upper buffer tank 506 and the lower buffer tank 507 passes through the upper jet main pipe 401 / lower jet main pipe 402, the jet branch pipe 404, and the jet branch pipe 403, and is ejected by the nozzle 11, which supports the glass plate 3 while ensuring the temperature in the kiln.

[0029] At the same time, if Figure 1 As shown, the driving mechanism of the glass plate 3 in this embodiment includes an upper driving roller 701 and a lower driving roller 702. The two sides of the glass plate 3 are clamped between the upper driving roller 701 and the lower driving roller 702 on both sides. The upper driving roller 701 and the lower driving roller 702 are driven by an upper driving roller motor 703 and a lower driving roller motor 704 respectively. Figure 1-3As shown, a driving roller base 8 is arranged below the upper driving roller motor 703 and the lower driving roller motor 704, and an upper driving roller advance and retreat screw 901, a lower driving roller advance and retreat screw 902, an upper driving roller advance and retreat guide rod 905 and a lower driving roller advance and retreat guide rod 906 are arranged in the driving roller base 8. The upper driving roller advance and retreat screw 901 and the lower driving roller advance and retreat screw 902 are driven by the upper driving roller advance and retreat motor 903 and the lower driving roller advance and retreat motor 904 respectively; the upper driving roller advance and retreat screw 901 and the lower driving roller advance and retreat screw 902 are connected to an upper driving roller lifting frame 1001 and a lower driving roller lifting frame 1002 respectively, and the upper driving roller lifting frame 1001 and the lower driving roller lifting frame 1002 are arranged on the upper driving roller advance and retreat guide rod 905 and the lower driving roller advance and retreat guide rod 906 respectively through the upper driving roller 701 advance and retreat guide sleeve and the lower driving roller advance and retreat guide sleeve 907. The upper drive roller lifting frame 1001 and the lower drive roller lifting frame 1002 are respectively provided with an upper drive roller 701 lifting screw, a lower drive roller lifting screw 1003, an upper drive roller 701 lifting guide rod and a lower drive roller lifting guide rod 1008. The upper drive roller 701 lifting screw and the lower drive roller lifting screw 1003 are driven by an upper drive roller lifting motor 1004 and a lower drive roller lifting motor 1005, respectively. An upper drive roller lifting seat 1006 and a lower drive roller lifting seat 1007 are respectively connected, and the upper drive roller lifting seat 1006 and the lower drive roller lifting seat 1007 are respectively arranged on the upper drive roller 701 lifting guide rod and the lower drive roller lifting guide rod 1008 through the upper drive roller 701 lifting guide sleeve and the lower drive roller lifting guide sleeve 1009, and the upper drive roller motor 703 and the lower drive roller motor 704 are respectively arranged on the upper drive roller lifting seat 1006 and the lower drive roller lifting seat 1007.

[0030] The upper drive roller motor 703 and the lower drive roller motor 704 can drive the upper drive roller advance and retreat screw 901 and the lower drive roller advance and retreat screw 902 respectively, so that the upper drive roller motor 703 and the lower drive roller motor 704 drive the upper drive roller 701 and the lower drive roller 702 to move relative to or towards each other, so that the positions of the upper drive roller 701 and the lower drive roller 702 on both sides of the glass plate 3 can be adjusted to adapt to glass plates 3 of different widths. Among them, the upper drive roller advance and retreat guide rod 905 and the lower drive roller advance and retreat guide rod 906 can play the role of making the upper drive roller 701 and the lower drive roller 702 move linearly to ensure the stability of their movement. At the same time, the upper drive roller 701 lifting screw rod and the lower drive roller lifting screw 1003 can respectively drive the upper drive roller 701 and the lower drive roller 702 to move up and down, so that the distance between the upper drive roller 701 and the lower drive roller 702 can be adjusted to adapt to glass plates 3 of different thicknesses. The upper driving roller 701 lifting guide rod and the lower driving roller lifting guide rod 1008 can ensure the stability of the upper driving roller 701 and the lower driving roller 702 moving up and down.

[0031] Working principle: The compressed air generated by the upper air compressor 504 and the lower air compressor 505 is heated by the heating mechanisms of the upper heating gas storage tank 501 and the lower heating gas storage tank 502 respectively, and then enters the upper buffer tank 506 and the lower buffer tank 507 for further heating by the heater 508. Subsequently, the heated compressed air passes through the upper jet main pipe 401 and the lower jet main pipe 402, the jet branch pipe 404 and the jet branch pipe 403, and is sprayed to the upper and lower surfaces of the glass plate 3 by the nozzle 11, heating the annealing furnace while supporting the glass plate 3. The heating temperature of the annealing furnace can be adjusted according to the temperature detected by the thermocouple. When the thermocouple detects that the temperature does not reach the required process temperature, the heating power of the heater 508 can be controlled to adjust the temperature of the ejected compressed air, thereby achieving the purpose of adjusting the temperature of the annealing furnace.

[0032] Subsequently, the upper driving roller 701 and the lower driving roller 702 on both sides of the glass plate 3 are driven by the upper driving roller advance and retreat screws 901 and the lower driving roller advance and retreat screws 902 to approach the glass plate 3 and move to the upper and lower sides of the glass plate 3 respectively, and then the upper driving roller 701 lifting screw and the lower driving roller 702 lifting screw drive the upper driving roller 701 to move downward and the lower driving roller 702 to move upward, thereby clamping the glass plate 3. The upper driving roller motor 703 and the lower driving roller motor 704 are started to drive the upper driving roller 701 and the lower driving roller 702 to rotate, thereby realizing the transmission of the glass plate 3.

[0033] Example 2 On the basis of Example 1, Figure 1 As shown, pressure regulating valves 12 are respectively provided at the connection points between the two rows of nozzles 11 located on both sides of the width direction of the glass plate 3 and the upper jet main pipe 401 and the lower jet main pipe 402, which can be opened and closed according to the width of the glass plate 3. When the glass plate 3 is narrow, one or two rows of jets on both sides of the glass plate 3 can be closed to reduce gas consumption and save energy.

[0034] Example 3 On the basis of Example 1, Figure 1 , 4 -6, the upper jet mechanism 201 and the lower jet mechanism 202 are respectively connected to the upper jet mechanism lifting screw 1301 and the lower jet mechanism lifting screw 1302, the upper jet mechanism lifting screw 1301 and the lower jet mechanism lifting screw 1302 are respectively driven by the upper jet mechanism lifting motor 1303 and the lower jet mechanism lifting motor 1304; the upper jet main pipe 401 and the lower jet main pipe 402 are respectively provided with a retractable metal pipe section 405.

[0035] The upper jet mechanism 201 and the lower jet mechanism 202 can be driven to rise and fall by the upper jet mechanism lifting screw 1301 and the lower jet mechanism lifting screw 1302 respectively, and the height of the glass plate 3 can be adjusted in accordance with the size of the upper and lower jet pressures; and while the upper jet mechanism 201 and the lower jet mechanism 202 are rising and falling, the upper jet main pipe 401 and the lower jet main pipe 402 can be respectively extended and retracted through the retractable metal pipe section 405 to ensure that the air supply is not affected. In addition, the upper jet mechanism 201 and the lower jet mechanism 202 are connected to the upper jet mechanism lifting guide rod 1305 and the lower jet mechanism lifting guide rod 1306 through the upper jet mechanism 201 lifting guide sleeve and the lower jet mechanism 202 lifting guide sleeve respectively, and the upper jet mechanism lifting guide rod 1305 and the lower jet mechanism lifting guide rod 1306 can ensure the stability of the upper jet mechanism 201 and the lower jet mechanism 202.

Claims

1. Mini LED back panel glass annealing furnace, characterized in that: The invention comprises a plurality of annealing units connected in sequence, wherein the annealing units comprise a shell (1), wherein an upper jet mechanism (201) and a lower jet mechanism (202) are arranged in the shell (1), and glass plate (3) transmission mechanisms are respectively arranged between the upper jet mechanism (201) and the lower jet mechanism (202) and on both sides of the glass plate (3) in the width direction; the upper jet mechanism (201) and the lower jet mechanism (202) are respectively connected to an upper heating gas storage tank (501) and a lower heating gas storage tank (502) through an upper jet main pipe (401) and a lower jet main pipe (402), and the upper heating gas storage tank (501) and the lower heating gas storage tank (502) are respectively connected to the upper heating gas storage tank (501) and the lower heating gas storage tank (502) through a compressed air pipe (503) is connected to an upper air compressor (504) and a lower air compressor (505), the upper heating air storage tank (501) and the lower heating air storage tank (502) are respectively provided with a heating mechanism, and the upper jet mechanism (201) and the lower jet mechanism (202) are respectively provided with a temperature detection mechanism (6); the glass plate (3) transmission mechanism comprises an upper driving roller (701) and a lower driving roller (702), the two side edges of the glass plate (3) are clamped between the upper driving roller (701) and the lower driving roller (702) on both sides, and the upper driving roller (701) and the lower driving roller (702) are respectively driven by an upper driving roller motor (703) and a lower driving roller motor (704); A driving roller base (8) is arranged below the driving roller motor (703) and the lower driving roller motor (704); an upper driving roller advance / retract screw (901) and a lower driving roller advance / retract screw (902) are arranged in the driving roller base (8); the upper driving roller advance / retract screw (901) and the lower driving roller advance / retract screw (902) are driven by the upper driving roller advance / retract motor (903) and the lower driving roller advance / retract motor (904), respectively; the upper driving roller advance / retract screw (901) and the lower driving roller advance / retract screw (902) are connected to an upper driving roller lifting frame (1001) and a lower driving roller lifting frame (1002), respectively; the upper driving roller lifting frame (1001) and the lower driving roller lifting frame (1002) are connected to each other; 002) are respectively provided with an upper drive roller (701) lifting screw and a lower drive roller lifting screw (1003), the upper drive roller (701) lifting screw and the lower drive roller lifting screw (1003) are respectively driven by an upper drive roller lifting motor (1004) and a lower drive roller lifting motor (1005), the upper drive roller (701) lifting screw and the lower drive roller lifting screw (1003) are respectively connected to an upper drive roller lifting seat (1006) and a lower drive roller lifting seat (1007), the upper drive roller motor (703) and the lower drive roller motor (704) are respectively provided on the upper drive roller lifting seat (1006) and the lower drive roller lifting seat (1007).

2. The Mini LED backplane glass annealing furnace according to claim 1, characterized in that: The upper jet mechanism (201) and the lower jet mechanism (202) both comprise a jet main board, on which a plurality of rows of nozzles (11) are arranged along the transmission direction of the glass plate (3), and the nozzles (11) of the upper jet mechanism (201) and the lower jet mechanism (202) are respectively connected to an upper jet main pipe (401) and a lower jet main pipe (402).

3. The Mini LED backplane glass annealing furnace according to claim 2, characterized in that: Pressure regulating valves (12) are respectively provided at the connection points between the two rows of nozzles (11) located on both sides of the glass plate (3) in the width direction and the upper jet main pipe (401) and the lower jet main pipe (402).

4. The Mini LED backplane glass annealing furnace according to claim 1, characterized in that: The upper drive roller lifting frame (1001) and the lower drive roller lifting frame (1002) are respectively provided with an upper drive roller (701) lifting guide rod and a lower drive roller lifting guide rod (1008); the upper drive roller lifting seat (1006) and the lower drive roller lifting seat (1007) are respectively arranged on the upper drive roller (701) lifting guide rod and the lower drive roller lifting guide rod (1008) via an upper drive roller (701) lifting guide sleeve and a lower drive roller lifting guide sleeve (1009).

5. The Mini LED backplane glass annealing furnace according to claim 1, characterized in that: The upper jet mechanism (201) and the lower jet mechanism (202) are respectively connected to an upper jet mechanism lifting screw (1301) and a lower jet mechanism lifting screw (1302); the upper jet mechanism lifting screw (1301) and the lower jet mechanism lifting screw (1302) are respectively driven by an upper jet mechanism lifting motor (1303) and a lower jet mechanism lifting motor (1304); and the upper jet main pipe (401) and the lower jet main pipe (402) are respectively provided with a retractable metal pipe section (405).

6. The Mini LED backplane glass annealing furnace according to claim 5, characterized in that: The upper jet mechanism (201) and the lower jet mechanism (202) are connected to an upper jet mechanism lifting guide rod (1305) and a lower jet mechanism lifting guide rod (1306) respectively through an upper jet mechanism (201) lifting guide sleeve and a lower jet mechanism (202) lifting guide sleeve.

7. The Mini LED backplane glass annealing furnace according to claim 1, characterized in that: The upper heating gas storage tank (501) and the lower heating gas storage tank (502) are respectively connected to an upper buffer tank (506) and a lower buffer tank (507) via pipelines; the upper buffer tank (506) and the lower buffer tank (507) are respectively connected to an upper jet main pipe (401) and a lower jet main pipe (402); and the upper buffer tank (506) and the lower buffer tank (507) are respectively provided with a heater (508).

8. The Mini LED backplane glass annealing furnace according to claim 7, characterized in that: Pressure regulating valves (12) are respectively provided on the pipeline between the upper heating gas storage tank (501) and the upper buffer tank (506), and on the pipeline between the lower heating gas storage tank (502) and the lower buffer tank (507).

9. The Mini LED backplane glass annealing furnace according to claim 8, characterized in that: The annealing unit is divided into a front zone (101) and a rear zone (102) along the transmission direction of the glass plate (3), and the front zone (101) and the rear zone (102) are respectively independently provided with an upper jet mechanism (201), a lower jet mechanism (202), a glass plate (3) transmission mechanism, a temperature detection mechanism (6), an upper buffer tank (506), and a lower buffer tank (507).

10. The Mini LED backplane glass annealing furnace according to claim 1, characterized in that: An upper drive roller advance / retract guide rod (905) and a lower drive roller advance / retract guide rod (906) are arranged in the drive roller base (8); an upper drive roller motor (703) and a lower drive roller motor (704) are arranged on the upper drive roller advance / retract guide rod (905) and the lower drive roller advance / retract guide rod (906) respectively through an upper drive roller (701) advance / retract guide sleeve and a lower drive roller advance / retract guide sleeve (907).

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