Vacuum melting furnace for preparing infrared glass

Abstract

The utility model discloses a vacuum melting furnace for preparing infrared glass, which comprises a shell, a crucible and a transfer mechanism, an upper furnace body is arranged at the upper end of the interior of the shell, a lower furnace body is arranged at the lower end of the interior of the shell, and the upper furnace body is communicated with the lower furnace body through a channel; a transfer block is arranged at the lower end of the crucible, and an annular groove and a groove are formed in the lower side face of the transfer block; the transfer mechanism comprises a lifting frame and a transfer table, the lifting frame capable of moving up and down is arranged in the lower furnace body, the upper end of the lifting frame is connected with the annular groove in an inserted mode, the adjustable transfer table is arranged outside the lower end of the shell, and the transfer table is matched with the groove. Through the automatic, accurate and efficient transferring mechanism, the convenient and orderly discharging process and simple and convenient operation control, the defects in the prior art in the aspects of transferring and discharging convenience are overcome, and the infrared glass production efficiency and the product quality are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of infrared glass processing technology, specifically to a vacuum melting furnace for preparing infrared glass. Background Technology

[0002] With the continuous development of the infrared glass processing industry, infrared glass, due to its excellent infrared transmittance, has been widely used in many fields such as optical instruments, infrared detection, and thermal imaging. As the requirements for the quality and performance of infrared glass in various fields become increasingly stringent, its preparation process is crucial. As a key piece of equipment, the vacuum melting furnace directly affects the quality of infrared glass. At present, common vacuum melting furnaces for infrared glass preparation have several technical issues. The crucible transfer methods of some vacuum melting furnaces are relatively rudimentary, relying heavily on manual operation or simple mechanical hoisting. Relying on manual operation is not only inefficient, but also extremely labor-intensive for workers in harsh environments such as high temperature and vacuum. At the same time, manual operation makes it difficult to ensure the accuracy and stability of the transfer process, which can easily lead to crucible collisions and tilting, affecting the melting quality of infrared glass raw materials. Some equipment that relies on simple mechanical hoisting has poor hoisting mechanism flexibility, making it difficult to achieve rapid and accurate transfer of crucibles between different furnace positions, and may also have problems such as inconvenient material discharge and low efficiency, which greatly limits the production efficiency of infrared glass. Therefore, we propose a vacuum melting furnace for infrared glass preparation. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a vacuum melting furnace for infrared glass preparation. Through an automated and precise and efficient transfer mechanism, a convenient and orderly discharge process, and simple operation and control, it solves the shortcomings of the existing technology in terms of transfer and discharge convenience, significantly improves the production efficiency and product quality of infrared glass, and can effectively solve the problems in the background technology.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a vacuum melting furnace for infrared glass preparation, comprising an outer shell, an upper furnace body at the upper end of the inner shell, a lower furnace body at the lower end of the inner shell, the upper furnace body and the lower furnace body being connected by a channel, and also comprising a crucible and a transfer mechanism.

[0005] Crucible: It is equipped with a transfer block at its lower end, and the lower side of the transfer block is respectively provided with an annular groove and a groove;

[0006] The transfer mechanism includes a lifting frame and a transfer platform. The lower furnace body has a vertically movable lifting frame inside, with the upper end of the lifting frame inserted into an annular groove. The lower end of the outer shell has an adjustable transfer platform that is configured to cooperate with the groove. Through an automated, precise, and efficient transfer mechanism, a convenient and orderly material discharge process, and simple operation and control, the shortcomings of existing technologies in terms of transfer and material discharge convenience are solved, significantly improving the production efficiency and product quality of infrared glass.

[0007] Furthermore, the outer arc surface of the housing is provided with a control switch group, the input end of which is electrically connected to an external power supply for stable control.

[0008] Furthermore, the transfer mechanism also includes an electric cylinder, which is mounted on the lower side of the lower furnace body via a ceramic seat. The telescopic end of the electric cylinder penetrates the middle of the lower side wall of the ceramic seat. A ceramic sealing ring is provided in the circular opening of the lower side wall of the lower furnace body. The telescopic end of the electric cylinder is slidably connected to the inside of the ceramic sealing ring. A lifting frame is provided at the telescopic end of the electric cylinder. The input end of the electric cylinder is electrically connected to the output end of the control switch group for stable driving.

[0009] Furthermore, the transfer mechanism also includes an electric cylinder II, a sliding column, and a moving block. Mounting plates are provided at both ends of the lower side of the outer shell. A sliding column is provided at the front end between the two mounting plates. The moving block is slidably connected to the outer arc surface of the sliding column. An electric cylinder II is installed on the upper side of the moving block. A transfer platform is provided at the telescopic end of the electric cylinder II. A discharge pipe is provided on the lower side wall of the lower furnace body. The transfer platform is located below the discharge pipe. The input end of the electric cylinder II is electrically connected to the output end of the control switch group to facilitate material discharge.

[0010] Furthermore, the transfer mechanism also includes a lead screw and a motor. The lead screw is rotatably connected between the mounting plates. The rear end of the moving block is threadedly connected to the lead screw. The right side of the mounting plate on the right side is equipped with a motor. The output shaft of the motor is fixedly connected to the center of the right end face of the lead screw. The input end of the motor is electrically connected to the output end of the control switch group for stable driving.

[0011] Furthermore, both the upper and lower furnace bodies are equipped with electric heating wires inside, and the input ends of the electric heating wires are electrically connected to the output ends of the control switch group to facilitate heating.

[0012] Furthermore, both the upper and lower furnace bodies have pipes at their rear ends on the outer arc surfaces. The rear ends of the pipes penetrate the rear ends of the outer arc surfaces of the outer shell. Each rear end of the outer arc surface of the outer shell has a support plate. Vacuum pumps are installed on the opposite outer sides of the two support plates. The suction ports of the vacuum pumps are connected to the rear ends of the adjacent pipes on the front side. The input ends of the vacuum pumps are electrically connected to the output ends of the control switch group to create a vacuum environment.

[0013] Furthermore, it also includes electric valves and airtight valves. Electric valves are connected in series in the middle of the channel and the discharge pipe. A gas pipe is provided at the left end of the outer arc surface of the lower furnace body. An airtight valve is connected in series in the middle of the gas pipe. The input ends of the electric valves and the airtight valves are electrically connected to the output end of the control switch group to facilitate subsequent gas filling.

[0014] Furthermore, the top wall of the upper furnace body is rotatably connected to a stirring rack via a sealed bearing, and a motor is mounted on the upper side of the upper furnace body via a ceramic base. The output shaft of the motor passes through the upper side wall of the ceramic base and is fixedly connected to the center of the upper end face of the stirring rack shaft. The input end of the motor is electrically connected to the output end of the control switch group for stirring.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This vacuum melting furnace for infrared glass preparation has the following advantages:

[0016] In the infrared glass preparation process, a transfer mechanism consisting of components such as electric cylinder one, electric cylinder two, lead screw, slide column, and electric motor, in cooperation with the lifting frame, transfer platform, and transfer block, automates the crucible transfer process. Precise control of each component allows for accurate transfer of the crucible between different furnace positions, significantly improving transfer efficiency and stability, reducing labor costs and intensity, and avoiding problems such as collisions and tilting caused by manual operation or simple mechanical lifting. This ensures the melting quality of the infrared glass raw materials. During the discharge stage, by controlling components such as electric cylinder two, electric motor, lead screw, and slide column, the crucible containing molten infrared glass can be quickly and smoothly removed from the lower furnace and moved to a location easily accessible for workers to collect. The entire discharge process is highly automated, reducing manual intervention and improving discharge efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the front side of the present invention;

[0018] Figure 2 This is an enlarged structural schematic diagram of point A of this utility model;

[0019] Figure 3 This is a schematic diagram of the front side cross-section of the present invention;

[0020] Figure 4 This is a structural schematic diagram of the cross-sectional plane of the front side of this utility model;

[0021] Figure 5 This is an enlarged structural schematic diagram of section B of this utility model;

[0022] Figure 6 This is an enlarged structural diagram of point C in this utility model;

[0023] Figure 7This is a partial structural diagram of the transfer block, crucible, lifting frame, and transfer platform of this utility model.

[0024] In the diagram: 1. Outer shell; 2. Transfer mechanism; 21. Electric cylinder one; 22. Lifting frame; 23. Electric cylinder two; 24. Transfer platform; 25. Lead screw; 26. Sliding column; 27. Motor; 28. Moving block; 3. Crucible; 4. Transfer block; 41. Annular groove; 42. Groove; 5. Ceramic seat; 6. Ceramic sealing ring; 7. Upper furnace body; 8. Lower furnace body; 81. Discharge pipe; 9. Channel; 10. Pipe; 11. Vacuum pump; 12. Electric valve; 13. Gas pipe; 131. Airtight valve; 14. Ceramic base; 15. Electric heating wire; 16. Stirring rack; 17. Motor; 18. Mounting plate; 19. Control switch group; 20. Sealed bearing. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-7This embodiment provides a technical solution: a vacuum melting furnace for infrared glass preparation, including a shell 1. A control switch group 19 is provided on the outer arc surface of the shell 1. The input terminal of the control switch group 19 is electrically connected to an external power source. An upper furnace body 7 is provided at the upper end of the shell 1. A stirring rack 16 is rotatably connected to the top wall of the upper furnace body 7 via a sealed bearing 20. A motor 17 is mounted on the upper side of the upper furnace body 7 via a ceramic base 14. The output shaft of the motor 17 passes through the upper side wall of the ceramic base 14 and is fixedly connected to the center of the upper end face of the stirring rack 16 shaft (the ceramic base 14 insulates the motor 17 from heat, and the sealed bearing 20 provides sealing and rotational support). The input terminal of the motor 17 is electrically connected to the output terminal of the control switch group 19. A lower furnace body 8 is provided at the lower end of the shell 1. The upper furnace body 7 and the lower furnace body 8 are connected by a channel 9. Pipes 10 are provided at the rear ends of the outer arc surfaces of both the upper furnace body 7 and the lower furnace body 8. A support plate is provided at the rear end of the outer arc surface of the outer shell 1. Vacuum pumps 11 are installed on the opposite outer sides of the two support plates. The suction port of the vacuum pump 11 is connected to the rear end of the adjacent pipe 10 on the front side. The input end of the vacuum pump 11 is electrically connected to the output end of the control switch group 19. Electric heating wires 15 are provided inside the upper furnace body 7 and the lower furnace body 8. The input end of the electric heating wires 15 is electrically connected to the output end of the control switch group 19. After the crucible 3 is placed in the upper furnace body 7 or the lower furnace body 8, the worker operates the control switch group 19 to start heating the electric heating wires 15. The temperature of the electric heating wires 15 rises, and the heat is transferred to the glass raw material in the crucible through thermal radiation and thermal conduction, which raises the temperature of the raw material. This is the main heat source for the melting of infrared glass raw material, providing the conditions for the glass raw material to be in a liquid state for subsequent stirring and other processes. The worker operates the control switch group 19 to operate the two vacuum pumps 11. The vanes inside the vacuum pump 11 rotate within the pump chamber. The vacuum pump 11's own suction port draws in, compresses, and discharges the gas inside the upper furnace body 7 and lower furnace body 8 through the adjacent pipe 10. A variable-volume sealed space is formed between the vanes and the pump chamber. As the vanes rotate, the volume of the sealed space continuously changes, thereby achieving the pumping function, maintaining the vacuum level inside the upper furnace body 7 and lower furnace body 8, facilitating the processing of infrared glass. It also includes a crucible 3 and a transfer mechanism 2.

[0027] Crucible 3: Its lower end is provided with a transfer block 4, and the lower side of the transfer block 4 is provided with an annular groove 41 and a groove 42 respectively;

[0028] Transfer mechanism 2 includes a lifting frame 22 and a transfer platform 24. The lower furnace body 8 has a vertically movable lifting frame 22 with a notch at its left end. The upper end of the lifting frame 22 is inserted into an annular groove 41. The lower end of the outer shell 1 has an adjustable transfer platform 24. The diameter of the circular path formed inside the lifting frame 22 is larger than the outermost diameter of the transfer platform 24. The transfer platform 24 is fitted into the groove 42. Transfer mechanism 2 also includes an electric cylinder 21, which is mounted on the lower side of the lower furnace body 8 via a ceramic seat 5. The telescopic end of the electric cylinder 21 penetrates the middle of the lower side wall of the ceramic seat 5. A ceramic sealing ring 6 is provided inside the circular opening of the lower side wall of the lower furnace body 8. The telescopic end of the electric cylinder 21 is slidably connected to the inside of the ceramic sealing ring 6. A lifting frame 22 is provided at the constricted end. The input end of electric cylinder 21 is electrically connected to the output end of control switch group 19 (the telescopic rod of electric cylinder 21 can slide inside the ceramic sealing ring 6, which provides a seal, and the ceramic seat 5 serves to insulate electric cylinder 21 from the temperature). The transfer mechanism 2 also includes electric cylinder 23, sliding column 26, and moving block 28. Mounting plates 18 are provided at both ends of the lower side of the outer shell 1. A sliding column 26 is provided at the front end between the two mounting plates 18. The outer arc surface of the sliding column 26 is slidably connected to the moving block 28. Electric cylinder 23 is installed on the upper side of the moving block 28. A transfer platform 24 is provided at the telescopic end of electric cylinder 23. A discharge pipe 81 is provided on the lower side wall of the lower furnace body 8. Electric valve 12 and airtight valve 131 are also included. The channel 9 is connected to the discharge pipe. Electric valves 12 are connected in series in the middle of the lower furnace body 8. A gas pipe 13 is located at the left end of the outer arc surface of the lower furnace body 8. An airtight valve 131 is connected in series in the middle of the gas pipe 13. The input ends of the electric valves 12 and 131 are electrically connected to the output end of the control switch group 19. The transfer platform 24 is located below the discharge pipe 81. The input end of the electric cylinder 23 is electrically connected to the output end of the control switch group 19. The transfer mechanism 2 also includes a lead screw 25 and a motor 27. The lead screw 25 is rotatably connected between the mounting plates 18. The rear end of the moving block 28 is threadedly connected to the lead screw 25. The motor 27 is installed on the right side of the mounting plate 18. The output shaft of the motor 27 is fixedly connected to the center of the right end face of the lead screw 25. The input end of the motor 27 is electrically connected to the output end of the control switch group 19. The transfer block 4 at the lower end of crucible 3 is then inserted into the transfer table 24 via the groove 42. Infrared glass raw material is then placed inside crucible 3. The control switch group 19 is then activated to operate electric cylinder 23. The telescopic end of electric cylinder 23 pushes crucible 3 upwards via the transfer table 24. Next, the operator operates the control switch group 19 to open the two electric valves 12, allowing crucible 3 to enter the lower furnace body 8 through the discharge pipe 81. The operator then operates the control switch group 19 to operate motor 27. The output shaft of motor 27 drives the lead screw 25 to rotate. At this time, under the rotational constraint of the thread of the lead screw 25 and the sliding column 26, the moving block 28 drives electric cylinder 23 to move to the right. The telescopic end of electric cylinder 23 then enters the interior of the lifting frame 22 through the notch at the left end of the lifting frame 22.Next, the operator operates the control switch assembly 19 to retract the extension end of the second electric cylinder 23 and raise the extension end of the first electric cylinder 21. At this time, the upper end of the lifting frame 22 enters the annular groove 41 at the lower end of the transfer block 4, and then continues to move upward (the groove 42 of the transfer block 4 disengages from the transfer table 24). The crucible 3 is lifted by the transfer block 4 and enters the interior of the upper furnace body 7. At this time, the operator operates the control switch assembly 19 to operate the second electric cylinder 23. The extension end of the second electric cylinder 23 drives the transfer table 24 away from the interior of the lower furnace body 8. The operator operates the control switch assembly 19 to close the lower electric valve 12. Then, the operator operates the control switch assembly 19 again to move the extension rod of the first electric cylinder 21 downward a certain distance. At this time, the lifting frame 22 moves the crucible 3 into the interior of the lower furnace body 8 through the transfer block 4. The operator operates the control switch assembly 19 to close the upper electric valve 12, shut down the lower vacuum pump 11, stop the vacuuming of the lower furnace body 8, and open the airtight valve 131, allowing air to flow down into the lower furnace body 8 through the air pipe 13. Air is introduced to restore atmospheric pressure inside the lower furnace body 8. Then, the lower electric valve 12 is opened. Workers operate the control switch group 19 in sequence. The telescopic end of electric cylinder 23 moves upward, driving the transfer platform 24. The upper end of the transfer platform 24 enters the groove 42 of the transfer block 4 and continues to move upward a distance, causing the annular groove 41 of the transfer block 4 to disengage from the lifting frame 22. Then, the output shaft of the motor 27 drives the lead screw 25 to rotate, causing the moving block 28 to move electric cylinder 23 to the left. At this time, the telescopic end of electric cylinder 23 leaves the interior of the lifting frame 22 through the notch at the left end of the lifting frame 22. The telescopic end of electric cylinder 23 retracts, driving the transfer block 4 and crucible 3 out of the lower furnace body 8 through the discharge pipe 81 via the transfer platform 24. Then, the output shaft of the motor 27 again drives the lead screw 25 to rotate, and electric cylinder 23 continues to move the transfer block 4 and crucible 3 to the left via the transfer platform 24. Workers can then collect the infrared glass liquid inside the crucible 3, facilitating simple crucible transfer.

[0029] The working principle of the vacuum melting furnace for infrared glass preparation provided by this utility model is as follows: Before infrared glass preparation, the worker first inserts the transfer block 4 at the lower end of the crucible 3 into the transfer table 24 through the groove 42. Then, the infrared glass raw material is placed into the inside of the crucible 3. Then, the worker operates the control switch group 19 to make the electric cylinder 23 run. The telescopic end of the electric cylinder 23 pushes the crucible 3 upward through the transfer table 24. Immediately afterwards, the worker operates the control switch group 19 to open the two electric valves 12. The crucible 3 enters the interior of the lower furnace body 8 through the discharge pipe 81. Then, the worker operates the control switch group 19 to make the motor 27 run. The output shaft of the motor 27 drives the lead screw 25 to rotate. At this time, under the rotation restriction of the thread of the lead screw 25 and the slide 26, the moving block 2... 8 drives electric cylinder 23 to move to the right. At this time, the telescopic end of electric cylinder 23 enters the interior of the lifting frame 22 through the notch at the left end of the lifting frame 22. Immediately afterwards, the control switch group 19 is operated to retract the telescopic end of electric cylinder 23 and raise the telescopic end of electric cylinder 21. At this time, the upper end of the lifting frame 22 enters the annular groove 41 at the lower end of the transfer block 4, and then continues to move upward (the groove 42 of the transfer block 4 disengages from the transfer table 24). The crucible 3 is lifted by the transfer block 4 and enters the interior of the upper furnace body 7. At this time, the worker operates the control switch group 19 to operate electric cylinder 23. The telescopic end of electric cylinder 23 drives the transfer table 24 away from the interior of the lower furnace body 8. The worker operates the control switch group 19 to close the lower electric valve 12. Then, the worker operates the control switch group 19 to... Two vacuum pumps 11 operate, and the vanes inside the vacuum pumps 11 rotate within the pump chamber. The suction port of the vacuum pump 11 draws in, compresses, and discharges the gas inside the upper furnace body 7 and the lower furnace body 8 through the adjacent pipe 10. A variable-volume sealed space is formed between the vanes of the vacuum pump 11 and the pump chamber. As the vanes rotate, the volume of the sealed space changes continuously, thereby achieving the pumping function and maintaining the vacuum level inside the upper furnace body 7 and the lower furnace body 8. Subsequently, the worker operates the control switch group 19 to heat the electric heating wire 15. The temperature of the electric heating wire 15 rises, and the heat is transferred to the glass raw material in the crucible through thermal radiation and thermal conduction, thereby raising the temperature of the raw material. After a period of time, the worker operates the control switch group 19 to move the extension rod of the electric cylinder 21 upwards a certain distance. The distance (the telescopic rod of electric cylinder 21 always slides inside the ceramic sealing ring 6, which provides a seal, and the ceramic seat 5 insulates electric cylinder 21 from heat) is maintained. At this time, the lifting frame 22 lifts the crucible 3 through the transfer block 4, and the lower end of the stirring frame 16 enters the interior of the crucible 3. The worker operates the control switch group 19 to make the motor 17 run. The output shaft of the motor 17 drives the stirring frame 16 to rotate (the ceramic base 14 insulates the motor 17 from heat, and the sealed bearing 20 provides a seal and rotational support), stirring the glass liquid inside the crucible 3. The purpose of stirring is to fully homogenize and clarify the glass liquid, improving the optical uniformity and quality of the infrared glass. Then, the worker operates the control switch group 19 again to move the telescopic rod of electric cylinder 21 downward a certain distance.At this time, the lifting frame 22 moves the crucible 3 into the lower furnace body 8 via the transfer block 4. The worker operates the control switch group 19 to close the upper electric valve 12 and the lower vacuum pump 11, stopping the vacuuming of the lower furnace body 8. The worker then opens the airtight valve 131, allowing air to be introduced into the lower furnace body 8 through the air pipe 13 to restore normal pressure. Next, the worker opens the lower electric valve 12. The worker then operates the control switch group 19 in sequence, causing the extension end of the electric cylinder 23 to move the transfer platform 24 upwards. The upper end of the transfer platform 24 enters the groove 42 of the transfer block 4 and continues to move upwards a certain distance, causing the transfer block 4... The annular groove 41 disengages from the lifting frame 22. Then, the output shaft of the motor 27 drives the lead screw 25 to rotate, causing the moving block 28 to move the electric cylinder 23 to the left. At this time, the telescopic end of the electric cylinder 23 leaves the interior of the lifting frame 22 through the notch at the left end of the lifting frame 22. The telescopic end of the electric cylinder 23 retracts, and through the transfer table 24, it drives the transfer block 4 and the crucible 3 to leave the interior of the lower furnace body 8 from the discharge pipe 81. Then, the output shaft of the motor 27 again drives the lead screw 25 to rotate, and the electric cylinder 23, through the transfer table 24, continuously moves the transfer block 4 and the crucible 3 to the left, allowing the worker to collect the infrared glass liquid inside the crucible 3.

[0030] It is worth noting that the motor 17 and motor 27 disclosed in the above embodiments can be high-temperature resistant explosion-proof servo motors, the vacuum pump 11 is a rotary vane vacuum pump, the electric heating wire 15 is a heating wire commonly used in the preparation of infrared glass, the electric cylinder 1 21 and electric cylinder 23 can be of model LGN-013, the electric valve can be of model 12PZ73W-10NR, and the control switch group 19 is provided with control buttons that correspond one-to-one and are used to control its switching.

[0031] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A vacuum melting furnace for infrared glass preparation, comprising a shell (1), wherein an upper furnace body (7) is provided at the upper end of the interior of the shell (1), and a lower furnace body (8) is provided at the lower end of the interior of the shell (1), the upper furnace body (7) and the lower furnace body (8) being connected by a channel (9), characterized in that: It also includes a crucible (3) and a transfer mechanism (2); Crucible (3): A transfer block (4) is provided at its lower end. The lower side of the transfer block (4) is provided with an annular groove (41) and a groove (42); The transfer mechanism (2) includes a lifting frame (22) and a transfer platform (24). The lower furnace body (8) is provided with a lifting frame (22) that can move up and down. The upper end of the lifting frame (22) is inserted into the annular groove (41). The lower end of the outer shell (1) is provided with an adjustable transfer platform (24). The transfer platform (24) is configured to cooperate with the groove (42).

2. The vacuum melting furnace for infrared glass preparation according to claim 1, characterized in that: The outer arc surface of the housing (1) is provided with a control switch group (19), and the input end of the control switch group (19) is electrically connected to an external power source.

3. The vacuum melting furnace for infrared glass preparation according to claim 2, characterized in that: The transfer mechanism (2) also includes an electric cylinder (21), which is installed on the lower side of the lower furnace body (8) via a ceramic seat (5). The telescopic end of the electric cylinder (21) passes through the middle of the lower side wall of the ceramic seat (5). A ceramic sealing ring (6) is provided in the round opening of the lower side wall of the lower furnace body (8). The telescopic end of the electric cylinder (21) is slidably connected to the inside of the ceramic sealing ring (6). A lifting frame (22) is provided at the telescopic end of the electric cylinder (21). The input end of the electric cylinder (21) is electrically connected to the output end of the control switch group (19).

4. The vacuum melting furnace for infrared glass preparation according to claim 2, characterized in that: The transfer mechanism (2) also includes an electric cylinder (23), a sliding column (26), and a moving block (28). The lower side of the outer shell (1) is provided with mounting plates (18) at both ends. A sliding column (26) is provided at the front end between the two mounting plates (18). The outer arc surface of the sliding column (26) is slidably connected to the moving block (28). An electric cylinder (23) is installed on the upper side of the moving block (28). A transfer platform (24) is provided at the telescopic end of the electric cylinder (23). A discharge pipe (81) is provided on the lower side wall of the lower furnace body (8). The transfer platform (24) is located below the discharge pipe (81). The input end of the electric cylinder (23) is electrically connected to the output end of the control switch group (19).

5. The vacuum melting furnace for infrared glass preparation according to claim 4, characterized in that: The transfer mechanism (2) also includes a lead screw (25) and a motor (27). The lead screw (25) is rotatably connected between the mounting plates (18). The rear end of the moving block (28) is threadedly connected to the lead screw (25). The right side of the mounting plate (18) on the right side is equipped with a motor (27). The output shaft of the motor (27) is fixedly connected to the center of the right end face of the lead screw (25). The input end of the motor (27) is electrically connected to the output end of the control switch group (19).

6. The vacuum melting furnace for infrared glass preparation according to claim 2, characterized in that: Both the upper furnace body (7) and the lower furnace body (8) are equipped with electric heating wires (15), and the input end of the electric heating wires (15) is electrically connected to the output end of the control switch group (19).

7. The vacuum melting furnace for infrared glass preparation according to claim 1, characterized in that: The upper furnace body (7) and the lower furnace body (8) are both provided with pipes (10) at the rear end of their outer arc surfaces. The rear end of each pipe (10) penetrates the rear end of the outer arc surface of the outer shell (1). The rear end of the outer arc surface of the outer shell (1) is provided with a support plate. Vacuum pumps (11) are installed on the opposite outer sides of the two support plates. The suction port of the vacuum pump (11) is connected to the rear end of the pipes (10) adjacent to the front side. The input end of the vacuum pump (11) is electrically connected to the output end of the control switch group (19).

8. The vacuum melting furnace for infrared glass preparation according to claim 4, characterized in that: Electric valves (12) are connected in series in the middle of the channel (9) and the discharge pipe (81). A gas pipe (13) is provided at the left end of the outer arc surface of the lower furnace body (8). An airtight valve (131) is connected in series in the middle of the gas pipe (13). The input ends of the electric valve (12) and the airtight valve (131) are electrically connected to the output end of the control switch group (19).

9. A vacuum melting furnace for preparing infrared glass according to claim 2, characterized in that: The top wall of the upper furnace body (7) is rotatably connected to a stirring rack (16) via a sealed bearing (20). A motor (17) is mounted on the upper side of the upper furnace body (7) via a ceramic base (14). The output shaft of the motor (17) passes through the upper side wall of the ceramic base (14) and is fixedly connected to the center of the upper end face of the shaft of the stirring rack (16). The input end of the motor (17) is electrically connected to the output end of the control switch group (19).

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