Aluminum oxide high-temperature sintering furnace with adjustable air inflow

Abstract

The aluminum oxide high-temperature sintering furnace comprises a furnace body and an outer shell fixedly installed on the outer side of the furnace body, an inner shell is fixedly installed on the inner side of the outer shell, a plurality of first exhaust boxes which are vertically distributed at equal intervals are installed on the inner side of the inner shell, and an exhaust air bellow is installed at one end of the inner shell; an air supply box is mounted between the exhaust bellows and the first exhaust box, and an air injection pipe is mounted on the outer side of the exhaust bellows; the quantity adjusting mechanism is used for adjusting the gas displacement, and the quantity adjusting mechanism comprises two baffles which are symmetrically installed on the inner side of the first exhaust box in a sliding mode; by means of the quantity adjusting mechanism, the two baffles can get close to or get away from each other along the inner sides of the first exhaust boxes, the gas displacement of the first exhaust boxes is adjusted, then multiple blanks separated in the furnace body are blown through the multiple first exhaust boxes, uniform gas spraying on the blanks is achieved, the blanks are prevented from being cracked due to high-temperature moisture absorption, and the service life of the blanks is prolonged. Therefore, the gas injection efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of high-temperature alumina sintering furnaces, specifically to a high-temperature alumina sintering furnace with adjustable air intake. Background Technology

[0002] Alumina high-temperature sintering furnace is a specialized thermal equipment used to sinter and densify alumina powder at a high temperature of 1400-1800℃. This process causes physical and chemical changes such as diffusion between particles, grain boundary migration, and liquid phase sintering, resulting in alumina ceramics with high density, high strength, and low porosity. These ceramics are widely used in electronic ceramics, structural ceramics, refractory materials, abrasives, and other fields.

[0003] To expel humid air from the furnace and prevent the green body from absorbing moisture and cracking at high temperatures, inert gas needs to be injected into the furnace to maintain a slight positive pressure and prevent backflow of humid air from the outside. Most existing sintering furnaces use the first gas inlet pipe to inject inert gas into the furnace. However, in order to improve production efficiency, modern sintering furnaces install multiple support plates to sinter multiple green bodies separately. Directly injecting gas through the first gas inlet pipe makes it difficult to quickly meet the required gas volume in the furnace, which affects the production quality of alumina ceramics. Summary of the Invention

[0004] The purpose of this invention is to provide an adjustable air intake alumina high-temperature sintering furnace to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An adjustable-intake alumina high-temperature sintering furnace includes: a furnace body and an outer shell fixedly installed on the outside of the furnace body; an inner shell fixedly installed on the inner side of the outer shell; a plurality of first exhaust boxes vertically and equidistantly distributed fixedly installed on the inner side of the inner shell; an exhaust air box fixedly installed at the end of the inner shell away from the outer shell; an air supply box fixedly installed between the exhaust air box and the first exhaust boxes; and an air injection pipe fixedly installed on the side of the exhaust air box away from the first exhaust boxes. The furnace also includes: a regulating mechanism for regulating the exhaust volume of gas; the regulating mechanism is installed on the inner side of the outer shell and the first exhaust boxes; the regulating mechanism includes two opposing... The system includes a baffle that is slidably installed inside the first exhaust box, and two baffles that can adjust the exhaust volume of the first exhaust box; an angle adjustment mechanism for adjusting the gas emission angle, the angle adjustment mechanism being installed outside the first exhaust box, the angle adjustment mechanism including a second exhaust box disposed outside the first exhaust box, the second exhaust box being adjustable at multiple angles; and a gas injection mechanism for injecting more types of gas into the furnace body, the gas injection mechanism being installed outside the gas injection pipe, the gas injection mechanism including multiple installation pipes arranged symmetrically on the outside of the gas injection pipe, the multiple installation pipes being able to inject different types of gas respectively.

[0007] Preferably, the adjustment mechanism further includes two rotating rods symmetrically rotated and installed inside the housing. Two opposing screw cylinders, both located inside the housing, are provided on both sides of the first exhaust box. The opposing screw cylinders are fixedly installed on the outer side of the rotating rods. Two symmetrically distributed movable plates are threaded between the two opposing screw cylinders on the same horizontal line, and the two movable plates are respectively located at the top and bottom of the first exhaust box. The two movable plates are respectively fixedly connected to two baffles located inside the first exhaust box. A sliding groove is provided on the outer side of the inner housing for the movable plates to slide and be fixedly installed on the inner side of the sliding groove for the movable plates to slide and be fixedly installed on the inner side of the sliding groove. Two synchronous belts are rotatably installed between the two rotating rods. A first motor is fixedly installed on the outer side of the housing, and the output end of the first motor is fixedly connected to one end of the adjacent rotating rod.

[0008] Preferably, the angle adjustment mechanism further includes an air intake cylinder fixedly installed at one end of the second exhaust box near the first exhaust box. Both ends of the air intake cylinder are rotatably installed on the inner side of the inner shell. An arc plate is fixedly installed at one end of the first exhaust box near the air intake cylinder, and the inner ring of the arc plate contacts the outer side of the air intake cylinder. An air intake hole is opened on the side of the air intake cylinder away from the second exhaust box, and the width of the air intake hole is smaller than the width of the arc plate. Mounting rods are fixedly installed at both ends of the air intake cylinder. One end of the mounting rod extends to the inner side of the outer shell. A first gear is fixedly installed on the outer side of the mounting rod. An electric push rod is installed at the bottom of the outer shell. A U-shaped rod is fixedly installed at the top of the electric push rod. Both ends of the U-shaped rod slide to the inner side of the outer shell. A rack that meshes with the first gear is provided on the outer side of the mounting rod, and the rack is fixedly installed at the end of the U-shaped rod.

[0009] Preferably, the air injection mechanism further includes a circular box fixedly installed at the end of the air injection pipe away from the exhaust air box. One end of the mounting pipe is fixedly installed on the outside of the circular box. A rotating ring is rotatably installed on the inside of the circular box. An air injection hole is opened on the outside of the rotating ring. A first sealing plate is fixedly installed on the inside of the mounting pipe. A second sealing plate is provided on the side of the first sealing plate close to the circular box. A T-shaped rod that slides through the first sealing plate is fixedly installed on the side of the second sealing plate away from the circular box. Two tension springs are fixedly installed between the end of the T-shaped rod away from the second sealing plate and the first sealing plate. A push ball is fixedly installed on the side of the second sealing plate away from the T-shaped rod. Two vent holes are opened on the surfaces of the first sealing plate and the second sealing plate. The vent holes on the first sealing plate and the vent holes on the second sealing plate are staggered. A second motor is fixedly installed on the outside of the circular box. A second gear is fixedly installed on the output end of the second motor. A gear ring that meshes with the second gear is fixedly installed on the outside of the rotating ring.

[0010] Preferably, a rubber sleeve is fixedly installed on the outer side of the baffle.

[0011] Preferably, a positioning plate is rotatably mounted on the outer side of the counter-rotating screw barrel, and the positioning plate is fixedly mounted between the inner shell and the outer shell.

[0012] Preferably, a support plate is fixedly installed between adjacent air inlets, and the support plate is fixedly installed on the inner side of the inner shell.

[0013] Preferably, two symmetrically distributed positioning ribs are fixedly installed on the inner side of the arc plate, and an arc-shaped groove is provided on the outer side of the air inlet cylinder for the positioning ribs to slide in a limited manner.

[0014] Preferably, the outer side of the second sealing disc is made of rubber, and the outer side of the second sealing disc is in contact with the inner side of the mounting pipe.

[0015] Preferably, two positioning rings are fixedly installed on the inner side of the circular box, and the outer ring of the positioning ring is in contact with the inner ring of the rotating ring.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The present invention, through the adjustment mechanism, enables two baffles to move closer or further apart along the inner side of the first exhaust box, thereby adjusting the exhaust volume of the first exhaust box. Then, multiple first exhaust boxes are used to spray multiple blanks separated in the furnace body, achieving uniform air spraying on the blanks, avoiding high temperature moisture absorption and cracking of the blanks, thereby improving the gas injection efficiency.

[0018] 2. The present invention enables the air inlet cylinder to rotate along the inner side of the arc plate through the angle adjustment mechanism, ensuring that the gas in the second exhaust box can enter the air inlet cylinder. The air inlet cylinder drives the second exhaust box to swing, and the gas can be discharged from the second exhaust box into the furnace body, thereby facilitating multi-angle jet spraying of the billet.

[0019] 3. The present invention, through the gas injection mechanism, can connect pipelines for conveying different types of gases to multiple installation pipes according to the production needs of the billet. Then, by adjusting the rotating ring, the gas in a single installation pipe is introduced into the round box, and then enters the exhaust air box through the gas injection pipe, thereby improving the convenience of gas injection. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the air injection pipe and installation connector structure in this invention;

[0022] Figure 3 This is a schematic diagram of the air supply box and exhaust box structure in this invention;

[0023] Figure 4 This is a schematic diagram of a partial cross-sectional structure of the circular box and the rotating ring in this invention;

[0024] Figure 5 This is a schematic diagram of a partial cross-sectional structure of the outer shell and inner shell in this invention;

[0025] Figure 6 for Figure 5 Enlarged structural diagram of area A in the middle;

[0026] Figure 7 This is a partial cross-sectional structural diagram of the mounting rod and U-shaped rod in this invention;

[0027] Figure 8 This is a partial cross-sectional view of the first exhaust box and baffle in this invention;

[0028] Figure 9 This is a schematic diagram of a partial cross-sectional structure of the air intake cylinder and the arc plate in this invention.

[0029] In the diagram: 1. Furnace body; 2. Outer shell; 3. Inner shell; 4. First exhaust box; 5. Exhaust air box; 6. Gas supply box; 7. Gas injection pipe; 8. Baffle; 9. Second exhaust box; 10. Installation pipe; 11. Rotating rod; 12. Opposite-direction screw barrel; 13. Moving plate; 14. Synchronous belt; 15. First motor; 16. Air inlet cylinder; 17. Arc plate; 18. Mounting rod; 19. Rack; 20. First gear; 21. Electric push rod; 22. U-shaped rod; 23. Round box; 24. Rotating ring; 25. First sealing disc; 26. Second sealing disc; 27. T-shaped rod; 28. Second motor; 29. ​​Tension spring; 30. Push ball; 31. Second gear; 32. Gear ring; 33. Rubber sleeve; 34. Positioning plate; 35. Support plate; 36. Positioning rib; 37. Positioning ring. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1: Please refer to Figures 1-9 The diagram shows an adjustable air intake alumina high-temperature sintering furnace, comprising a furnace body 1 and an outer shell 2 fixedly installed on the outside of the furnace body 1. Multiple blanks are placed inside the furnace body 1 through partitions. An inner shell 3 is fixedly installed on the inner side of the outer shell 2. Multiple first exhaust boxes 4 are fixedly installed on the inner side of the inner shell 3 in a vertically equidistant manner. An exhaust air box 5 is fixedly installed at the end of the inner shell 3 away from the outer shell 2. An air supply box 6 is fixedly installed between the exhaust air box 5 and the first exhaust boxes 4. An air injection pipe 7 is fixedly installed on the side of the exhaust air box 5 away from the first exhaust boxes 4. Inert gas is injected into the exhaust air box 5 through the air injection pipe 7. The exhaust air box 5 injects inert gas into the multiple first exhaust boxes 4 through the air supply box 6. The multiple first exhaust boxes 4 spray inert gas onto the multiple blanks in the furnace body 1 respectively, thereby improving the gas injection efficiency.

[0032] The adjustment mechanism includes two baffles 8 symmetrically slidably mounted inside the first exhaust box 4. The two baffles 8 can adjust the exhaust volume of the first exhaust box 4. The adjustment mechanism also includes two rotating rods 11 symmetrically rotatably mounted inside the outer shell 2. Two opposing screw cylinders 12 are provided on both sides of the first exhaust box 4, both located inside the outer shell 2. The opposing screw cylinders 12 are fixedly mounted on the outside of the rotating rods 11. Two symmetrically distributed movable plates 13 are threaded between the two opposing screw cylinders 12 located on the same horizontal line. The two movable plates 13 are located at the top and bottom of the first exhaust box 4, respectively. The two movable plates 13 are fixedly connected to the two baffles 8 located inside the first exhaust box 4. A sliding groove is provided on the outer side of the inner shell 3 for the movable plates 13 to slide in a limited manner. An optical shaft for the movable plates 13 to slide in a limited manner is fixedly mounted on the inner side of the sliding groove. When the rotating rods 11 rotate, they can drive the multiple opposing screw cylinders 12 to rotate synchronously. The two opposing screw cylinders 12 located on the same horizontal line drive the two movable plates 13 to move closer to each other or to each other. The two moving plates 13 move along the inner side of the first exhaust box 4, respectively, so as to adjust the exhaust volume of the first exhaust box 4. This allows for adjustment of the exhaust volume of the first exhaust box 4 according to the gas injection requirements of the furnace body 1, so as to achieve uniform gas injection for each billet and avoid the billet from absorbing moisture and cracking at high temperature. Two synchronous belts 14 are rotatably installed between the two rotating rods 11. A first motor 15 is fixedly installed on the outer side of the outer shell 2, and the output end of the first motor 15 is fixedly connected to one end of the adjacent rotating rod 11. The first motor 15 drives the corresponding rotating rod 11 to rotate, so that the rotating rod 11 drives the other rotating rod 11 to rotate synchronously through the synchronous belt 14. A rubber sleeve 33 is fixedly installed on the outer side of the baffle 8, so that the baffle 8 moves along the inner side of the first exhaust box 4 through the rubber sleeve 33, ensuring the sealing of the baffle 8 to the first exhaust box 4. A positioning plate 34 is rotatably installed on the outer side of the counter-rotating screw barrel 12, and the positioning plate 34 is fixedly installed between the inner shell 3 and the outer shell 2, so that the positioning plate 34 provides auxiliary support for the counter-rotating screw barrel 12.

[0033] Example 2: Please refer to Figures 5-9This embodiment further illustrates Example 1. The angle adjustment mechanism shown in the figure includes a second exhaust box 9 disposed outside the first exhaust box 4. The second exhaust box 9 can be adjusted at multiple angles. The angle adjustment mechanism also includes an air inlet cylinder 16 fixedly installed on one end of the second exhaust box 9 near the first exhaust box 4. Both ends of the air inlet cylinder 16 are rotatably installed on the inner side of the inner shell 3. An arc plate 17 is fixedly installed on one end of the first exhaust box 4 near the air inlet cylinder 16, and the inner ring of the arc plate 17 contacts the outer side of the air inlet cylinder 16. An air inlet hole is opened on the side of the air inlet cylinder 16 away from the second exhaust box 9. Furthermore, the width of the air inlet is smaller than the width of the arc plate 17, so that the arc plate 17 provides a shield for the air inlet, ensuring that the gas in the second exhaust box 9 can enter the air inlet cylinder 16 through the air inlet and then be discharged into the furnace body 1 from the second exhaust box 9. Mounting rods 18 are fixedly installed at both ends of the air inlet cylinder 16. One end of the mounting rod 18 extends to the inner side of the outer shell 2, and a first gear 20 is fixedly installed on the outer side of the mounting rod 18. An electric push rod 21 is installed at the bottom of the outer shell 2, and a U-shaped rod 22 is fixedly installed at the top of the electric push rod 21. Both ends of the U-shaped rod 22 slide to the outer shell 2. On the inner side, a rack 19 that meshes with the first gear 20 is provided on the outer side of the mounting rod 18, and the rack 19 is fixedly installed at the end of the U-shaped rod 22. The electric push rod 21 can drive the U-shaped rod 22 to move up and down, so that the U-shaped rod 22 drives the rack 19 to move synchronously. The rack 19 drives the corresponding first gear 20 to rotate, so that the first gear 20 drives the air inlet cylinder 16 to rotate through the mounting rod 18. The air inlet cylinder 16 can then rotate along the inner side of the arc plate 17, and drive the second exhaust box 9 to swing, so that the angle of the second exhaust box 9 can be adjusted, which facilitates the adjustment of the blowing angle on the billet. A support plate 35 is fixedly installed between adjacent air inlets 16, and the support plate 35 is fixedly installed on the inner side of the inner shell 3, so that the support plate 35 provides a seal for the gap between the air inlets 16 and the inner shell 3, ensuring the normal flow of gas. Two symmetrically distributed positioning ribs 36 are fixedly installed on the inner side of the arc plate 17, and an arc-shaped groove is opened on the outer side of the air inlet 16 for the positioning ribs 36 to slide in a limited manner. When the air inlet 16 rotates, the arc-shaped groove on its outer side can move along the outer side of the positioning ribs 36, providing auxiliary positioning for the air inlet 16 and preventing the air inlet 16 from falling off the arc plate 17.

[0034] Example 3: Please refer to Figures 1-4This embodiment further illustrates other embodiments. The gas injection mechanism shown in the figure includes multiple mounting pipes 10 arranged symmetrically on the outside of the gas injection pipe 7. The multiple mounting pipes 10 can inject different types of gas respectively. The gas injection mechanism also includes a circular box 23 fixedly installed on the end of the gas injection pipe 7 away from the exhaust air box 5. One end of the mounting pipe 10 is fixedly installed on the outside of the circular box 23. A rotating ring 24 is rotatably installed on the inside of the circular box 23. A gas injection hole is opened on the outside of the rotating ring 24. A first sealing plate 25 is fixedly installed on the inside of the mounting pipe 10. A second sealing plate 26 is provided on the side of the first sealing plate 25 near the circular box 23. A sliding plate is fixedly installed on the side of the second sealing plate 26 away from the circular box 23. A T-shaped rod 27 passes through the first sealing disc 25. Two tension springs 29 are fixedly installed between the end of the T-shaped rod 27 away from the second sealing disc 26 and the first sealing disc 25. A push ball 30 is fixedly installed on the side of the second sealing disc 26 away from the T-shaped rod 27. Two vent holes are opened on the surfaces of both the first sealing disc 25 and the second sealing disc 26, and the vent holes on the first sealing disc 25 and the second sealing disc 26 are staggered. When the push ball 30 is aligned with the air injection hole on the rotating ring 24, the contraction force of the tension springs 29 pulls the T-shaped rod 27 to move, causing the T-shaped rod 27 to push the second sealing disc 26 away from the first sealing disc 25. The gas in the mounting pipe 10 can pass through the first sealing disc 25 and the second sealing disc 26. The air vent on the sealing plate 26 enters the round box 23, and then enters the exhaust air box 5 through the air injection pipe 7. A second motor 28 is fixedly installed on the outside of the round box 23. A second gear 31 is fixedly installed on the output end of the second motor 28, and a gear ring 32 that meshes with the second gear 31 is fixedly installed on the outside of the rotating ring 24. The second motor 28 can drive the gear ring 32 to rotate through the second gear 31, so that the gear ring 32 drives the rotating ring 24 to rotate along the inside of the round box 23. The air injection hole of the rotating ring 24 pushes the adjacent push ball 30 to move, so that the push ball 30 contacts the outside of the rotating ring 24. The reaction force of the rotating ring 24 on the push ball 30 makes the push ball 30 push the second sealing plate 26 to contact the first sealing plate 25. The second sealing disc 26 and the first sealing disc 25 can seal the corresponding mounting pipe 10. When the air injection hole on the rotating ring 24 is aligned with the push ball 30 in the next mounting pipe 10, the mounting pipe 10 is opened to facilitate the injection of gas into the round box 23. The outer side of the second sealing disc 26 is made of rubber and contacts the inner side of the mounting pipe 10, allowing the second sealing disc 26 to move along the inner side of the mounting pipe 10, ensuring the smooth movement of the second sealing disc 26. Two positioning rings 37 are fixedly installed on the inner side of the round box 23, and the outer ring of the positioning ring 37 contacts the inner ring of the rotating ring 24, improving the smoothness of the rotation of the rotating ring 24.

[0035] Working principle: First, the operator connects the pipeline for conveying inert gas to the installation connector 10, allowing the inert gas to enter the injection pipe 7 through the round box 23, and then into the exhaust air box 5. The exhaust air box 5 sends the gas through multiple air supply boxes 6 into multiple first exhaust boxes 4. The air in the first exhaust boxes 4 enters the air inlet cylinder 16, and then is discharged into the furnace body 1 from the second exhaust box 9, blowing the billets separated by multiple baffles in the furnace body 1. When it is necessary to reduce the inert gas intake, the operator starts the first motor 15. The first motor 15 drives the corresponding rotating rod 11 to rotate, causing the rotating rod 11 to drive another rotating rod 11 to rotate synchronously through the synchronous belt 14. The rotating rod 11 drives multiple counter-rotating screw barrels 12 to rotate synchronously, causing two counter-rotating screw barrels 12 on the same horizontal line to drive the corresponding two moving plates 13 to move closer to each other. The two moving plates 13 drive two baffles respectively. 8 moves along the inner side of the first exhaust box 4 to adjust the exhaust volume of the first exhaust box 4, thereby reducing the exhaust volume of the second exhaust box 9 on the furnace body 1. Conversely, the first motor 15 rotates in the opposite direction to make the two baffles 8 move away from each other, thereby increasing the exhaust volume of the second exhaust box 9 on the furnace body 1. When it is necessary to adjust the exhaust angle of the second exhaust box 9, the operator starts the electric push rod 21. The electric push rod 21 drives the U-shaped rod 22 to move along the inner side of the outer shell 2. The U-shaped rod 22 drives the rack 19 to move synchronously, so that the rack 19 drives the corresponding first gear 20 to rotate. The first gear 20 drives the air inlet cylinder 16 to rotate through the mounting rod 18. The air inlet cylinder 16 can then drive the second exhaust box 9 to swing, which facilitates the adjustment of the angle of the second exhaust box 9, thereby achieving a uniform and comprehensive air jet effect, avoiding high temperature moisture absorption and cracking of the billet, and improving the air intake efficiency of inert gas.

[0036] Considering that different types of billets require the injection of corresponding types of inert gases, the operator can connect each type of inert gas discharge pipe to multiple installation pipes 10. When the inert gas needs to be replaced, the operator starts the second motor 28. The second motor 28 drives the gear ring 32 to rotate via the second gear 31. The gear ring 32 drives the rotating ring 24 to rotate along the inner side of the circular box 23. When the air injection hole of the rotating ring 24 is aligned with the push ball 30 inside the installation pipe 10, the contraction force of the tension spring 29 pulls the T-shaped rod 27 to move. The T-shaped rod 27 pushes the second sealing plate 26 away from the first sealing plate 25, allowing the gas in the installation pipe 10 to pass through the first sealing plate 25. The vent holes on the sealing disc 25 and the second sealing disc 26 enter the round box 23, and then enter the exhaust air box 5 through the air injection pipe 7. At the same time, the push ball 30 in the remaining installation pipe 10 contacts the outer side of the rotating ring 24. The push ball 30 can make the second sealing disc 26 contact the first sealing disc 25, and make the T-shaped rod 27 stretch the tension spring 29. The second sealing disc 26 and the first sealing disc 25 block the corresponding vent holes, thereby sealing the installation pipe 10. Thus, by rotating the rotating ring 24, the corresponding installation pipe 10 can be opened as needed to facilitate the injection of the required inert gas, thereby improving the convenience of inert gas injection.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-temperature alumina sintering furnace with adjustable air intake, characterized in that, include: The furnace body (1) and the outer shell (2) fixedly installed on the outside of the furnace body (1) are provided. An inner shell (3) is fixedly installed on the inner side of the outer shell (2). Multiple first exhaust boxes (4) are installed on the inner side of the inner shell (3) in a vertical and equidistant manner. An exhaust air box (5) is installed at one end of the inner shell (3). An air supply box (6) is installed between the exhaust air box (5) and the first exhaust box (4). An air injection pipe (7) is installed on the outer side of the exhaust air box (5). Also includes: A regulating mechanism is used to regulate the exhaust volume of gas. The regulating mechanism is installed inside the outer shell (2) and the first exhaust box (4). The regulating mechanism includes two baffles (8) that are symmetrically slidably installed inside the first exhaust box (4). The two baffles (8) can regulate the exhaust volume of the first exhaust box (4). An angle adjustment mechanism is used to adjust the gas emission angle. The angle adjustment mechanism is installed on the outside of the first exhaust box (4). The angle adjustment mechanism includes a second exhaust box (9) disposed on the outside of the first exhaust box (4). The second exhaust box (9) can be adjusted at multiple angles. The gas injection mechanism is used to inject more types of gas into the furnace body (1). The gas injection mechanism is installed on the outside of the gas injection pipe (7). The gas injection mechanism includes a plurality of installation pipes (10) arranged symmetrically on the outside of the gas injection pipe (7). The plurality of installation pipes (10) can inject different types of gas respectively.

2. The adjustable air intake alumina high-temperature sintering furnace according to claim 1, characterized in that: The adjustment mechanism also includes two rotating rods (11) symmetrically rotated and installed inside the outer casing (2). Two opposing screw cylinders (12) are provided on both sides of the first exhaust box (4), both located inside the outer casing (2). The opposing screw cylinders (12) are installed on the outside of the rotating rods (11). Two movable plates (13) are threaded between the two opposing screw cylinders (12) on the same horizontal line, and the two movable plates (13) are located at the top and bottom of the first exhaust box (4) respectively. 13) The two baffles (8) are fixedly connected to the two baffles (8) located inside the first exhaust box (4). The outer side of the inner shell (3) is provided with a sliding groove for the sliding of the moving plate (13) and the inner side of the sliding groove is provided with an optical axis for the sliding of the moving plate (13). Two synchronous belts (14) are rotatably installed between the two rotating rods (11). The outer side of the outer shell (2) is provided with a first motor (15) and the output end of the first motor (15) is fixedly connected to one end of the adjacent rotating rod (11).

3. The adjustable air intake alumina high-temperature sintering furnace according to claim 2, characterized in that: The angle adjustment mechanism also includes an air inlet cylinder (16) installed on the second exhaust box (9) near the first exhaust box (4). Both ends of the air inlet cylinder (16) are rotatably installed on the inner side of the inner shell (3). One end of the first exhaust box (4) is equipped with an arc plate (17), and the inner ring of the arc plate (17) is in contact with the outer side of the air inlet cylinder (16). An air inlet hole is opened on the side of the air inlet cylinder (16) away from the second exhaust box (9). Both ends of the air inlet cylinder (16) are equipped with mounting rods (18). A first gear (20) is fixedly installed on the outer side of the mounting rod (18). An electric push rod (21) is installed at the bottom of the outer shell (2). A U-shaped rod (22) is installed on the top of the electric push rod (21). A rack (19) that meshes with the first gear (20) is provided on the outer side of the mounting rod (18), and the rack (19) is installed at the end of the U-shaped rod (22).

4. The adjustable air intake alumina high-temperature sintering furnace according to claim 3, characterized in that: The air injection mechanism further includes a circular box (23) installed at the end of the air injection pipe (7) away from the exhaust box (5). One end of the mounting pipe (10) is installed on the outside of the circular box (23). A rotating ring (24) is rotatably installed on the inside of the circular box (23). An air injection hole is opened on the outside of the rotating ring (24). A first sealing plate (25) is installed on the inside of the mounting pipe (10). A second sealing plate (26) is provided on the side of the first sealing plate (25) near the circular box (23). A T-shaped rod (27) that slides through the first sealing plate (25) is installed on one side of the second sealing plate (26). The T-shaped rod (27) is located away from the second sealing plate (25). Two tension springs (29) are installed between one end of the second sealing plate (26) and the first sealing plate (25). A push ball (30) is installed on the side of the second sealing plate (26) away from the T-shaped rod (27). Two vent holes are opened on the surfaces of the first sealing plate (25) and the second sealing plate (26). The vent holes on the first sealing plate (25) and the vent holes on the second sealing plate (26) are staggered. A second motor (28) is installed on the outside of the round box (23). A second gear (31) is fixedly installed on the output end of the second motor (28). A gear ring (32) that meshes with the second gear (31) is fixedly installed on the outside of the rotating ring (24).

5. The adjustable air intake alumina high-temperature sintering furnace according to claim 2, characterized in that: A rubber sleeve (33) is installed on the outside of the baffle (8).

6. The adjustable air intake alumina high-temperature sintering furnace according to claim 2, characterized in that: A positioning plate (34) is rotatably mounted on the outer side of the counter-rotating screw barrel (12), and the positioning plate (34) is installed between the inner shell (3) and the outer shell (2).

7. The adjustable air intake alumina high-temperature sintering furnace according to claim 3, characterized in that: A support plate (35) is installed between adjacent air inlets (16), and the support plate (35) is installed on the inside of the inner shell (3).

8. The adjustable air intake alumina high-temperature sintering furnace according to claim 3, characterized in that: Two positioning ribs (36) are installed on the inner side of the arc plate (17), and an arc-shaped groove is provided on the outer side of the air inlet cylinder (16) for the positioning ribs (36) to slide in a limited position.

9. The adjustable air intake alumina high-temperature sintering furnace according to claim 4, characterized in that: The outer side of the second sealing disc (26) is made of rubber, and the outer side of the second sealing disc (26) is in contact with the inner side of the mounting pipe (10).

10. The adjustable air intake alumina high-temperature sintering furnace according to claim 4, characterized in that: Two positioning rings (37) are installed on the inner side of the round box (23), and the outer ring of the positioning ring (37) is in contact with the inner ring of the rotating ring (24).

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