Intermediate frequency induction heating furnace for sintering silicon-carbon rod blank

Abstract

The utility model discloses a silicon carbon rod blank sintering uses intermediate frequency induction heating furnace relates to heating furnace technical field, including support frame, guide cylinder, heating furnace, rotation motor drive mixing auger carries out mixing stirring work to the raw material heating in heating furnace, and hot exhaust pipe exports the waste heat gas in heating furnace to cooling pipe, realizes the cooling use of hot gas, one -way control valve realizes the hot exhaust pipe and prevents the backflow effect, and turbine pipe utilizes the gas after cooling to form two gas streams of cold and hot through high -speed rotation with the conveying pipe, and hot gas conveying pipe, buffer pipe utilize the nozzle to convey hot gas stream to heating furnace, form the heating effect of heat cycle to the raw material in heating furnace, and the valve, flowmeter, regulating valve set up can play the adjusting control effect to the use of buffer pipe, connecting pipe, and the connection of nozzle and guide cylinder plays the spacing effect with the protective cover, and cold gas conveying pipe collects cold gas stream to the gas holder in, and it is convenient to use heat cycle again through turbine pipe.

Description

Technical Field

[0001] This utility model relates to the field of heating furnace technology, and in particular to a medium-frequency induction heating furnace for sintering silicon carbide rod blanks. Background Technology

[0002] Medium-frequency induction heating furnaces utilize the principle of electromagnetic induction to convert electrical energy into heat energy, achieving rapid and uniform heating of silicon carbide rod blanks. This technology features high heating efficiency, precise temperature control, energy saving, and environmental friendliness. It is suitable for high-temperature sintering processes. In the production of silicon carbide rods, the blanks need to undergo two sintering processes, including primary forming sintering and secondary sintering with embedded material. Medium-frequency induction heating furnaces can meet the heating requirements at different stages.

[0003] A patent with publication number CN219797919U discloses a medium-frequency induction heating furnace for sintering the heating element of a silicon carbide rod. This patent includes a furnace body, heating element, furnace door, rotating rod, limiting rod, rotating disk, first gear, second gear, connecting rod, mounting bracket, drive shaft, water tank, and drive motor. It employs a rotating disk and rotating rod. When heating the silicon carbide rod heating element, the silicon carbide rod can be inserted between the limiting rod and rotating rod, which are at equal angles. Then, the furnace door can be closed, and the heating element can be activated. During heating, the drive motor drives the drive shaft to rotate, which in turn drives the rotating disk to rotate, thereby causing the silicon carbide rod located between the limiting rod and rotating rod to revolve, changing its position relative to the heating element. The distance between the heating elements is considered. Simultaneously, as the rotating rod revolves, the first gear meshes with the second gear. The second gear is fixedly installed, and the first gear rotates while revolving, thus driving the rotating rod to rotate. This friction causes the silicon carbide rod to rotate, changing the heating surface and significantly improving the uniformity of heating the silicon carbide rod, increasing heating efficiency. A water tank is used, with the drive shaft rotatably connected to the water tank via a sealed bearing. The water tank cools the drive shaft, reducing heat transfer to the drive motor and protecting it from thermal damage during prolonged operation, thus improving long-term stability. However, this patent still has the following problems:

[0004] In the sintering process of silicon carbide rods, the aforementioned medium-frequency induction heating furnace only uses a fixed heating method. The silicon carbide rods cannot rotate or move during the heating process, resulting in uneven heating and easy problems such as local overheating or insufficient heating. Traditional heating furnaces generate a large amount of high-temperature exhaust gas during operation. Direct emission not only wastes energy but may also pollute the environment.

[0005] To address the above issues, a medium-frequency induction heating furnace for sintering silicon carbide rod blanks needs to be designed to overcome these problems. Utility Model Content

[0006] The main purpose of this invention is to provide a medium-frequency induction heating furnace for sintering silicon carbide rod blanks, which can effectively solve the problems in the background art.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A medium-frequency induction heating furnace for sintering silicon carbide rod blanks includes a support frame, a guide cylinder, and a heating furnace, wherein a heat circulation mounting assembly is provided at one end of the heating furnace;

[0009] The thermal circulation assembly includes a hot gas outlet pipe located at one end of the heating furnace. A cooling pipe is connected to the end of the hot gas outlet pipe away from the heating furnace. A one-way control valve is connected to the outer wall of the hot gas outlet pipe. A conveying pipe is connected to the end of the cooling pipe away from the hot gas outlet pipe. A turbine pipe is connected to the end of the conveying pipe away from the cooling pipe. A hot gas conveying pipe is connected to the end of the turbine pipe away from the conveying pipe. A buffer pipe is connected to the end of the hot gas conveying pipe and the buffer pipe. A connecting pipe is connected to the end of the buffer pipe away from the valve. A nozzle is connected to the end of the connecting pipe away from the regulating valve. A protective cover is connected to the outer wall of the nozzle.

[0010] As a preferred embodiment of this utility model, a flow meter is connected to the end of the outer wall of the buffer pipe away from the valve, a regulating valve is connected to the end of the outer wall of the connecting pipe close to the flow meter, a cold air delivery pipe is connected to the end of the turbine pipe away from the hot air delivery pipe, a control valve is connected to the end of the outer wall of the cold air delivery pipe close to the turbine pipe, and a gas storage tank is connected to the end of the cold air delivery pipe away from the control valve.

[0011] As a preferred embodiment of this utility model, one end of the heating furnace is connected to a sealing cylinder, one end of the sealing cylinder is connected to a rotary motor, and the output end of the rotary motor is connected to a stirring auger through one side of the heating furnace.

[0012] As a preferred embodiment of this utility model, the hot exhaust pipe is rotatably connected to the cooling pipe, the heating furnace is fixedly connected to the hot exhaust pipe, the cooling pipe is rotatably connected to the conveying pipe, and the conveying pipe is fixedly connected to the turbine pipe through a connecting flange.

[0013] In a preferred embodiment of this utility model, the turbine tubes are all fixedly connected to the hot gas delivery pipe via connecting flanges, the hot gas delivery pipe is rotatably connected to the buffer pipe, and the buffer pipe is rotatably connected to the connecting pipe.

[0014] As a preferred embodiment of this utility model, the connecting pipe passes through the guide cylinder and the top of the heating furnace and is fixedly connected to the nozzle, the nozzle is fixedly connected to the protective cover, and the connection between the hot gas conveying pipe and the buffer pipe is fixedly connected to the valve.

[0015] As a preferred embodiment of this utility model, the regulating valve is fixedly sleeved at the connection between the buffer tube and the connecting tube, and the flow meter is sleeved on the outer wall of the buffer tube near the end of the regulating valve.

[0016] As a preferred embodiment of this utility model, the cold air delivery pipe is fixedly connected to one end of the turbine pipe via a connecting flange, the control valve is fixedly sleeved on one end of the outer wall of the cold air delivery pipe, the cold air delivery pipe is rotatably connected to the gas storage tank, and the gas storage tank is fixedly installed at one end of the guide cylinder.

[0017] Beneficial effects

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This medium-frequency induction heating furnace for sintering silicon carbide rod blanks uses a rotary motor to drive a stirring auger to heat and mix the raw materials inside the furnace. A hot gas outlet pipe discharges waste heat gas from the furnace to a cooling pipe for reuse after cooling. A one-way control valve prevents backflow through the hot gas outlet pipe. A turbine pipe uses a delivery pipe to generate two streams of hot and cold gas through high-speed rotation. A hot gas delivery pipe and a buffer pipe deliver the hot gas stream to the furnace through nozzles, creating a thermal circulation that effectively heats the raw materials inside the furnace. Valves, flow meters, and regulating valves can regulate and control the use of the buffer pipe and connecting pipe. A protective cover limits the connection between the nozzle and the guide tube. A cold gas delivery pipe collects the cold gas stream into a storage tank for reuse through the turbine pipe in a thermal cycle. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the installation structure of the stirring auger of this utility model;

[0022] Figure 3 This is a schematic diagram of the nozzle mounting structure of this utility model;

[0023] Figure 4 This is a schematic diagram of structure A of this utility model.

[0024] In the diagram: 1. Support frame; 2. Guide cylinder; 3. Heating furnace; 4. Sealing cylinder; 5. Rotary motor; 6. Stirring auger; 7. Hot gas outlet pipe; 8. Cooling pipe; 9. One-way control valve; 10. Delivery pipe; 11. Turbine pipe; 12. Hot gas delivery pipe; 13. Valve; 14. Buffer pipe; 15. Flow meter; 16. Regulating valve; 17. Connecting pipe; 18. Nozzle; 19. Protective cover; 20. Cold gas delivery pipe; 21. Control valve; 22. Gas storage tank. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0026] like Figures 1-4 As shown, the medium-frequency induction heating furnace for sintering silicon carbide rod blanks includes a support frame 1, a guide cylinder 2, and a heating furnace 3. A heat circulation installation assembly is provided at one end of the heating furnace 3.

[0027] The thermal circulation assembly includes a hot gas outlet pipe 7 located at one end of the heating furnace 3. A cooling pipe 8 is connected to the end of the hot gas outlet pipe 7 away from the heating furnace 3. A one-way control valve 9 is connected to the outer wall of the hot gas outlet pipe 7. A conveying pipe 10 is connected to the end of the cooling pipe 8 away from the hot gas outlet pipe 7. A turbine pipe 11 is connected to the end of the conveying pipe 10 away from the cooling pipe 8. A hot gas conveying pipe 12 is connected to the end of the turbine pipe 11 away from the conveying pipe 10. A buffer pipe 14 is connected to the end of the hot gas conveying pipe 12 away from the turbine pipe 11. A valve 13 is connected at the connection between the hot gas conveying pipe 12 and the buffer pipe 14. A connecting pipe 17 is connected to the end of the buffer pipe 14 away from the valve 13. A nozzle 18 is connected to the end of the connecting pipe 17 away from the regulating valve 16. A protective cover 19 is connected to the outer wall of the nozzle 18.

[0028] A sealing cylinder 4 is connected to one end of the heating furnace 3, and a rotary motor 5 is connected to one end of the sealing cylinder 4. The output end of the rotary motor 5 is connected to a stirring auger 6 through one side of the heating furnace 3. The hot gas outlet pipe 7 is rotatably connected to the cooling pipe 8, the heating furnace 3 is fixedly connected to the hot gas outlet pipe 7, the cooling pipe 8 is rotatably connected to the conveying pipe 10, and the conveying pipe 10 is fixedly connected to the turbine pipe 11 through a connecting flange. The turbine pipe 11 is fixedly connected to the hot gas conveying pipe 12 through a connecting flange, the hot gas conveying pipe 12 is rotatably connected to the buffer pipe 14, and the buffer pipe 14 is rotatably connected to the connecting pipe 17.

[0029] Specifically, the heating furnace 3 is fixedly installed on the support frame 1, ensuring a good seal between the guide cylinder 2 and the heating furnace 3. A rotary motor 5 and a stirring auger 6 are installed, ensuring the stirring auger 6 is located at the center of the heating furnace 3 to achieve uniform stirring. The hot gas outlet pipe 7, one-way control valve 9, cooling pipe 8, conveying pipe 10, and turbine pipe 11 are connected sequentially, ensuring good sealing at each pipe connection to prevent hot gas leakage. Then, the hot gas conveying pipe 12, buffer pipe 14, connecting pipe 17, and nozzle 18 are connected, and a protective cover 19 is installed to limit and protect the nozzle 18.

[0030] Connect the cold air outlet of turbine pipe 11 to cold air delivery pipe 20. Regulate the airflow through control valve 21 to deliver the cold air into storage tank 22. Storage tank 22 should be fixedly installed on one side of guide cylinder 2 to ensure structural stability. Install flow meter 15 on the outer wall of buffer pipe 14 and regulating valve 16 on the outer wall of connecting pipe 17 to ensure real-time monitoring and regulation of airflow, guaranteeing system stability and controllability. Load silicon carbide rod blank raw material into heating furnace 3 through guide cylinder 2. Close sealing cylinder 4 to ensure heating. Ensure good sealing inside furnace 3 to prevent heat loss. Turn on rotary motor 5 to drive stirring auger 6 to mix and stir the raw material. Then start the medium-frequency induction heating system. The induction coil starts working, heating the silicon carbide rod blank through electromagnetic induction.

[0031] A flow meter 15 is connected to the end of the outer wall of the buffer pipe 14 away from the valve 13. A regulating valve 16 is connected to the end of the outer wall of the connecting pipe 17 near the flow meter 15. A cold air delivery pipe 20 is connected to the end of the turbine pipe 11 away from the hot air delivery pipe 12. A control valve 21 is connected to the end of the outer wall of the cold air delivery pipe 20 near the turbine pipe 11. A gas storage tank 22 is connected to the end of the cold air delivery pipe 20 away from the control valve 21.

[0032] Connecting pipe 17 passes through guide cylinder 2, the top of heating furnace 3 and is fixedly connected to nozzle 18. Nozzle 18 is fixedly connected to protective cover 19. Hot gas delivery pipe 12 and buffer pipe 14 are connected to valve 13. Regulating valve 16 is fixedly sleeved at the connection of buffer pipe 14 and connecting pipe 17. Flow meter 15 is sleeved on the outer wall of buffer pipe 14 near the end of regulating valve 16. Cold gas delivery pipe 20 is fixedly connected to one end of turbine pipe 11 through connecting flange. Control valve 21 is fixedly sleeved on one end of the outer wall of cold gas delivery pipe 20. Cold gas delivery pipe 20 is rotatably connected to gas storage tank 22. Gas storage tank 22 is fixedly installed at one end of guide cylinder 2.

[0033] Specifically, the hot exhaust gas generated during the heating process is discharged through the hot exhaust pipe 7, and the one-way control valve 9 prevents the hot steam from flowing back. The hot exhaust gas enters the cooling pipe 8 for initial cooling, and then enters the turbine pipe 11 through the delivery pipe 10. The turbine pipe 11 separates the cooled gas into two streams of hot and cold air through high-speed rotation. The hot air stream enters the buffer pipe 14 through the hot air delivery pipe 12, and the cold air stream enters the storage tank 22 through the cold air delivery pipe 20 for storage, which is convenient for subsequent recycling. The hot air stream in the buffer pipe 14 is delivered to the nozzle 18 through the connecting pipe 17. The nozzle 18 sprays the hot air into the heating furnace 3 in a directional manner, forming a thermal cycle and further improving the heating efficiency. The flow meter 15 and the regulating valve 16 monitor and regulate the airflow in real time to ensure that the heating process is stable and controllable. The cold air in the storage tank 22 can be delivered back to the turbine pipe 11 through the delivery pipe to participate in a new round of hot and cold separation process, realizing the recycling of cold air and further improving energy utilization efficiency.

[0034] It should be noted that this utility model is a medium-frequency induction heating furnace for sintering silicon carbide rod blanks. In use, the silicon carbide rod blank raw material is loaded into the heating furnace 3 through the top feed inlet of the guide cylinder 2, ensuring uniform distribution of the raw material to facilitate subsequent stirring and heating. The rotary motor 5 is turned on, driving the stirring auger 6 to rotate inside the heating furnace 3 to mix and stir the raw material, ensuring uniform heating and avoiding localized overheating or uneven sintering. The medium-frequency induction heating system is then activated, and the induction coil begins to work, using the principle of electromagnetic induction to heat the silicon carbide rod blank inside the heating furnace 3. Heating gradually raises the temperature to the required sintering temperature. The hot exhaust gas generated during heating is discharged from the heating furnace 3 through the hot exhaust pipe 7. A one-way control valve 9 prevents hot gas backflow, ensuring unidirectional flow of the exhaust gas. The hot exhaust gas enters the cooling pipe 8 and is cooled by a cooling device such as water cooling or air cooling to lower the gas temperature, facilitating subsequent hot-cold separation in the turbine pipe 11. The cooled gas enters the turbine pipe 11 through the delivery pipe 10. The turbine pipe 11 uses high-speed rotating airflow to separate the gas into hot and cold streams, which are then transported through the hot gas delivery pipe 12 to… The buffer pipe 14 delivers cold gas to the gas storage tank 22 via the cold gas delivery pipe 20 for subsequent recycling. After being buffered by the buffer pipe 14, the hot gas flow is delivered back to the heating furnace 3 via the connecting pipe 17 and the nozzle 18 to reheat the raw materials, forming a thermal energy cycle and improving energy efficiency. The cold gas flow is regulated by the control valve 21 and then enters the gas storage tank 22 for storage. It can be delivered back to the turbine pipe 11 as needed to participate in cold and hot separation, realizing a closed-loop gas recycling. The flow meter 15 monitors the gas flow in the buffer pipe 14 in real time to ensure stable hot gas delivery. The regulating valve 16 adjusts the gas flow according to the flow data to control the temperature in the heating furnace 3 and avoid overheating or insufficient temperature. The valve 13 is used to control the opening and closing between the hot gas delivery pipe 12 and the buffer pipe 14 to flexibly adjust the hot gas supply. The nozzle 18 sprays the hot gas flow into the heating furnace 3 in a directional manner to ensure uniform distribution of hot gas and improve the heating effect. The protective cover 19 limits and protects the connection between the nozzle 18 and the guide cylinder 2 to prevent the nozzle from shifting due to high temperature or vibration, ensuring long-term stable operation of the equipment.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A medium-frequency induction heating furnace for sintering silicon carbide rod blanks, comprising a support frame (1), a guide cylinder (2), and a heating furnace (3), characterized in that: A heat circulation installation assembly is provided at one end of the heating furnace (3); The heat circulation assembly includes a hot exhaust pipe (7) disposed at one end of the heating furnace (3), a cooling pipe (8) connected to the end of the hot exhaust pipe (7) away from the heating furnace (3), a one-way control valve (9) connected to the outer wall of the hot exhaust pipe (7), a conveying pipe (10) connected to the end of the cooling pipe (8) away from the hot exhaust pipe (7), and a turbine pipe (11) connected to the end of the conveying pipe (10) away from the cooling pipe (8). One end of 10) is connected to a hot gas delivery pipe (12), and the end of the hot gas delivery pipe (12) away from the turbine pipe (11) is connected to a buffer pipe (14). A valve (13) is connected at the connection between the hot gas delivery pipe (12) and the buffer pipe (14). A connecting pipe (17) is connected at the end of the buffer pipe (14) away from the valve (13). A nozzle (18) is connected at the end of the connecting pipe (17) away from the regulating valve (16). A protective cover (19) is connected to the outer wall of the nozzle (18).

2. The medium-frequency induction heating furnace for sintering silicon carbide rod blanks according to claim 1, characterized in that: A flow meter (15) is connected to the end of the outer wall of the buffer pipe (14) away from the valve (13). A regulating valve (16) is connected to the end of the outer wall of the connecting pipe (17) close to the flow meter (15). A cold air delivery pipe (20) is connected to the end of the turbine pipe (11) away from the hot air delivery pipe (12). A control valve (21) is connected to the end of the outer wall of the cold air delivery pipe (20) close to the turbine pipe (11). A gas storage tank (22) is connected to the end of the cold air delivery pipe (20) away from the control valve (21).

3. The medium-frequency induction heating furnace for sintering silicon carbide rod blanks according to claim 1, characterized in that: One end of the heating furnace (3) is connected to a sealing cylinder (4), and one end of the sealing cylinder (4) is connected to a rotary motor (5). The output end of the rotary motor (5) is connected to a stirring auger (6) through the side of the heating furnace (3).

4. The medium-frequency induction heating furnace for sintering silicon carbide rod blanks according to claim 1, characterized in that: The hot exhaust pipe (7) is rotatably connected to the cooling pipe (8), the heating furnace (3) is fixedly connected to the hot exhaust pipe (7), the cooling pipe (8) is rotatably connected to the conveying pipe (10), and the conveying pipe (10) is fixedly connected to the turbine pipe (11) through a connecting flange.

5. The medium-frequency induction heating furnace for sintering silicon carbide rod blanks according to claim 1, characterized in that: The turbine pipe (11) is fixedly connected to the hot gas delivery pipe (12) through a connecting flange. The hot gas delivery pipe (12) is rotatably connected to the buffer pipe (14). The buffer pipe (14) is rotatably connected to the connecting pipe (17).

6. The medium-frequency induction heating furnace for sintering silicon carbide rod blanks according to claim 1, characterized in that: The connecting pipe (17) passes through the guide cylinder (2), the top of the heating furnace (3) and is fixedly connected to the nozzle (18). The nozzle (18) is fixedly connected to the protective cover (19). The connection between the hot gas conveying pipe (12) and the buffer pipe (14) is fixedly connected to the valve (13).

7. The medium-frequency induction heating furnace for sintering silicon carbide rod blanks according to claim 2, characterized in that: The regulating valve (16) is fixedly sleeved at the connection between the buffer tube (14) and the connecting tube (17), and the flow meter (15) is sleeved on the outer wall of the buffer tube (14) at one end near the regulating valve (16).

8. The medium-frequency induction heating furnace for sintering silicon carbide rod blanks according to claim 2, characterized in that: The cold air delivery pipe (20) is fixedly connected to one end of the turbine pipe (11) via a connecting flange. The control valve (21) is fixedly sleeved on one end of the outer wall of the cold air delivery pipe (20). The cold air delivery pipe (20) is rotatably connected to the gas storage tank (22). The gas storage tank (22) is fixedly installed on one end of the guide cylinder (2).

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