A high-temperature box furnace with uniform nitrogen distribution

Abstract

The utility model relates to high -temperature box -type furnace technical field discloses a high -temperature box -type furnace that nitrogen gas is evenly distributed, including furnace body, the inner wall of furnace body is provided with heat -preserving layer mechanism, the downside of furnace body is connected with the air pipe, and the upper end of air pipe passes through heat -preserving layer mechanism and extends to the inside of furnace body, the side of furnace body is connected with the exhaust pipe, and the upper end of exhaust pipe passes through heat -preserving layer mechanism and is obliquely inserted upwards, and the bottom side of furnace body inside is provided with the holding pot mechanism, the upside of furnace body is provided with high -temperature heating mechanism, and one side of furnace body is provided with temperature measuring mechanism, and the side of furnace body away from exhaust pipe is rotatably connected with the furnace door, and one side of furnace body is installed with LED industrial control panel, the utility model discloses a nitrogen gas is introduced by installing air pipe in the bottom, makes nitrogen gas to be able to distribute evenly in the stove, can further promote the evenness of stove temperature, ensures the stability of high -temperature kiln temperature to the significant improvement sintering quality.

Description

Technical Field

[0001] This utility model relates to the field of high-temperature box furnace technology, and in particular to a high-temperature box furnace with uniform nitrogen distribution. Background Technology

[0002] Hard carbon materials are mainly used as anode materials for new energy batteries. Their unique structure gives them significant advantages in electrochemical performance. However, the high-temperature sintering of hard carbon materials requires an ultra-high temperature box furnace. The sintering of hard carbon materials needs to be carried out at a high temperature of 1600℃. The core purpose is to achieve densification and crystal phase optimization of the material through high-temperature driven ion diffusion and chemical reaction, thereby obtaining high ionic conductivity and structural stability. However, in existing high-temperature box furnaces, the temperature field distribution inside the furnace is uneven and unstable due to fluctuations in high-temperature gas pressure during sintering. The fluctuating temperature environment directly leads to unstable sintering quality of hard carbon materials. In view of this, a high-temperature box furnace with uniform nitrogen distribution is proposed to solve the above problems. Utility Model Content

[0003] To address the technical problem of uneven temperature distribution within high-temperature box furnaces, this invention provides a high-temperature box furnace with uniform nitrogen distribution.

[0004] This utility model is achieved using the following technical solution: a high-temperature box furnace with uniform nitrogen distribution, comprising a furnace body, an insulation layer mechanism on the inner wall of the furnace body, an air inlet pipe connected to the lower side of the furnace body, the upper end of the air inlet pipe passing through the insulation layer mechanism and extending into the interior of the furnace body, an exhaust pipe connected to the side of the furnace body, the upper end of the exhaust pipe passing through the insulation layer mechanism and obliquely upward, a bowl-holding mechanism provided on the bottom side inside the furnace body, a high-temperature heating mechanism provided on the upper side of the furnace body, a temperature measuring mechanism provided on one side of the furnace body, a furnace door rotatably connected to the side of the furnace body away from the exhaust pipe, and an LED industrial control panel installed on one side of the furnace body.

[0005] As a further improvement to the above solution, the container mechanism includes a corundum base installed on the insulation layer mechanism on the bottom side of the furnace body, a sagger fixedly connected to the upper side of the corundum base, and the lower side of the sagger located above the upper port of the air inlet pipe.

[0006] As a further improvement to the above solution, the high-temperature heating mechanism includes multiple heating boxes fixedly connected to the upper side of the furnace body. Multiple silicon molybdenum rods are installed on the bottom side of each heating box. The multiple silicon molybdenum rods are arranged in a linear array. The lower end of each silicon molybdenum rod passes downward through the heat insulation layer mechanism and extends into the interior of the furnace body. An electrical connection mechanism is provided on the outside of each heating box.

[0007] As a further improvement to the above solution, the power connection mechanism includes a heating terminal cover fixedly connected to the outside of each heating box, and a heating terminal is installed on the inside of the heating terminal cover, and the heating terminal is electrically connected to the silicon molybdenum rod.

[0008] As a further improvement to the above solution, the temperature measuring mechanism includes a type B thermocouple installed on the upper side of the furnace body, and the lower end of the type B thermocouple extends downward into the interior of the furnace body.

[0009] As a further improvement to the above solution, the insulation layer structure includes a No. 5 insulation board fixedly connected to the inner side of the furnace body, a No. 4 insulation board fixedly connected to the side of the No. 5 insulation board away from the furnace body, a No. 3 insulation board fixedly connected to the side of the No. 4 insulation board away from the No. 5 insulation board, a No. 2 insulation board fixedly connected to the side of the No. 3 insulation board away from the No. 4 insulation board, and a No. 1 insulation board fixedly connected to the side of the No. 2 insulation board away from the No. 3 insulation board.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model introduces nitrogen gas by installing an air inlet pipe at the bottom, so that the nitrogen gas can be evenly distributed in the furnace, which can further improve the uniformity of the furnace temperature, ensure the stability of the high-temperature kiln temperature, and thus significantly improve the sintering quality. 2. By installing an air inlet pipe on the bottom side of the furnace body and an exhaust pipe on the side of the furnace, this utility model not only optimizes the flow and distribution of gas inside the furnace, but also effectively ensures the stability of the pressure inside the furnace, providing more reliable environmental conditions for the high-temperature sintering process. Attached Figure Description

[0011] Figure 1 A schematic diagram of the overall structure of a high-temperature box furnace with uniform nitrogen distribution provided by this utility model; Figure 2 for Figure 1 First-person sectional view; Figure 3 for Figure 1 Second-view sectional view; Figure 4 This is a schematic diagram of the structure of a silicon molybdenum rod in one embodiment of the present invention.

[0012] Explanation of key symbols: 1. Furnace body; 2. Corundum base; 3. Sagger; 4. Type B thermocouple; 5. Heating box; 6. Heating terminal; 7. Heating terminal cover; 8. Air inlet pipe; 10. Silicon molybdenum rod; 11. Insulation board No. 1; 12. Insulation board No. 2; 13. Insulation board No. 3; 14. Insulation board No. 4; 15. Insulation board No. 5; 16. Exhaust pipe; 17. Furnace door. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0014] Example: Please combine Figures 1-3 This embodiment of a high-temperature box furnace with uniform nitrogen distribution includes a furnace body 1. In this embodiment, the outer surface of the furnace body 1 is first coated with a high-performance anti-rust primer to enhance the furnace body's anti-rust ability. On top of the anti-rust primer, a heat-resistant silver powder paint is coated. This paint layer can not only withstand high temperatures, but also reflect some heat, improve the thermal efficiency of the furnace body, and at the same time give the furnace body a beautiful metallic texture. In addition, a water-cooled jacket is installed on the outside of the furnace body. The circulating cooling water removes the heat from the surface of the furnace body, reduces the temperature of the outer wall of the furnace body, and protects the furnace body structure from high-temperature damage. High-strength, high-temperature resistant sealing material is used between the water-cooled jacket and the furnace body to ensure that the cooling water does not leak. Furthermore, the furnace body is welded using a full welding process to ensure the strength and sealing performance of the welded parts. After the welding is completed, a strict pressure test is carried out. By injecting a certain pressure of gas into the furnace body, the welded parts are checked for air leakage to ensure the airtightness of the furnace body. Please combine Figure 2 As shown, the inner wall of the furnace body 1 is provided with a heat insulation layer mechanism. The lower side of the furnace body 1 is connected to an air inlet pipe 8. The upper end of the air inlet pipe 8 passes through the heat insulation layer mechanism and extends into the interior of the furnace body 1. The side of the furnace body 1 is connected to an exhaust pipe 16. The exhaust pipe 16 is lined with a corrosion-resistant ceramic pipe to enhance the high temperature resistance and corrosion resistance of the pipe, while improving the safety of the overall system. Please combine Figure 1 As shown, the upper end of the exhaust pipe 16 passes through the insulation layer mechanism and is inserted obliquely upward. A bowl-holding mechanism is provided on the bottom side of the furnace body 1. A high-temperature heating mechanism is provided on the upper side of the furnace body 1. A temperature measuring mechanism is provided on one side of the furnace body 1. Through the above technical solution, a preheating box combined with a multi-point air intake method is adopted, so that the air intake is fully preheated and dispersed into the furnace cavity, which reduces the impact of the air intake on the temperature field inside the furnace and improves the uniformity of the temperature inside the furnace. At the same time, a reasonable exhaust channel and exhaust rate are designed to ensure timely renewal of the atmosphere inside the furnace and the discharge of harmful gases, while reducing the impact of pressure fluctuations inside the furnace on the temperature field. Please combine Figure 2 As shown, the furnace body 1 is rotatably connected to the side away from the exhaust pipe 16. The furnace door adopts a mechanical manual locking mechanism to ensure that the furnace door can be firmly locked on the furnace body when closed, preventing heat leakage and gas escape from the furnace. The edge of the furnace door is equipped with a high-quality sealing silicone strip to further enhance the sealing performance of the furnace door and ensure the stability of the temperature and atmosphere inside the furnace. It should be noted that an LED industrial control panel is installed on one side of the furnace body 1. The LED industrial control panel adopts an advanced touch screen or button operation interface, which makes it convenient for users to set parameters and monitor the furnace status. The system has a real-time monitoring function, which can monitor parameters such as temperature and pressure inside the furnace in real time, and will promptly alarm when abnormalities occur to ensure the safe operation of the equipment. Please combine Figure 1 As shown, the container mechanism includes a corundum base 2 installed on the bottom insulation layer mechanism of the furnace body 1. A sagger 3 is fixedly connected to the upper side of the corundum base 2, and the lower side of the sagger 3 is located above the upper port of the air inlet pipe 8.

[0015] Please combine Figure 1 As shown, the high-temperature heating mechanism includes two heating boxes 5 that are fixedly connected to the upper side of the furnace body 1, and the two heating boxes 5 are arranged symmetrically. Please combine Figure 1 As shown, multiple silicon molybdenum rods 10 are installed on the bottom side of each heating box 5. The multiple silicon molybdenum rods 10 are arranged in a linear array. The lower end of each silicon molybdenum rod 10 passes through the insulation layer mechanism and extends into the furnace body 1. An electrical connection mechanism is provided on the outside of each heating box 5. The electrical connection mechanism includes a heating terminal cover 7 fixedly connected to the outside of each heating box 5. A heating terminal 6 is installed on the inside of the heating terminal cover 7. The heating terminal 6 is electrically connected to the silicon molybdenum rod 10.

[0016] Through the above technical solution, the silicon molybdenum rod 10 is used as the heating element. Because it has the advantages of high operating temperature, fast heating speed and good temperature uniformity, it is very suitable for heating in high temperature furnaces. In this embodiment, the temperature control module uses the silicon molybdenum rod in conjunction with the SCR power regulator and the step-down transformer to achieve automatic adjustment within a wide voltage range of 0V to 380V, thereby improving the accuracy and stability of temperature control. Please combine Figure 1 As shown, the temperature measuring mechanism includes a type B thermocouple 4 installed on the upper side of the furnace body 1, and the lower end of the type B thermocouple 4 extends downward into the interior of the furnace body 1. Through the above technical solution, in this embodiment, a type B thermocouple 4 is used as the temperature control element. The type B thermocouple 4 has a wide temperature range, covering 0℃ to 1800℃, and is particularly suitable for the high temperature environment in this technology. By accurately measuring and controlling the temperature inside the furnace, we ensure the stability and reliability of the sintering process. Please combine Figure 2As shown, the insulation layer structure includes a No. 5 insulation board 15 fixedly connected to the inner side of the furnace body 1, a No. 4 insulation board 14 fixedly connected to the side of the No. 5 insulation board 15 away from the furnace body 1, a No. 3 insulation board 13 fixedly connected to the side of the No. 4 insulation board 14 away from the No. 5 insulation board 15, a No. 2 insulation board 12 fixedly connected to the side of the No. 3 insulation board 13 away from the No. 4 insulation board 14, and a No. 1 insulation board 11 fixedly connected to the side of the No. 2 insulation board 12 away from the No. 3 insulation board 13. It should be noted that pressureless sintered silicon carbide beams are used as the supporting structure for the top of the furnace cavity. Silicon carbide material has extremely high temperature resistance and excellent mechanical strength, and can withstand heavy loads and vibrations at high temperatures. Ceramic fiber boards with different temperature levels such as 1800℃ / 1600℃ / 1400℃ / 1260℃ are laid under the beams to improve the heat preservation performance and temperature uniformity of the furnace cavity. The sides and bottom of the furnace cavity also use ceramic fiber boards with different temperature ratings of 1800℃ / 1600℃ / 1400℃ / 1260℃ as insulation materials to ensure the stability and insulation effect of the furnace cavity at high temperatures. The implementation principle of a high-temperature box furnace with uniform nitrogen distribution in this application embodiment is as follows: the material to be sintered is placed in the sagger 3, then the furnace door 17 is closed, and the preheated nitrogen is injected into the furnace body 1 through the gas inlet pipe 8. At the same time, during the sintering process, if the gas pressure is too high or waste gas is generated, the gas can be discharged through the exhaust pipe 16. Power is supplied to the silicon molybdenum rod 10 through the heating terminal 6 to heat the inside of the furnace body 1 and achieve high-temperature sintering.

[0017] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A high-temperature box furnace with uniform nitrogen distribution, comprising a furnace body (1), characterized in that, The inner wall of the furnace body (1) is provided with a heat insulation layer mechanism. The lower side of the furnace body (1) is connected to an air inlet pipe (8). The upper end of the air inlet pipe (8) passes through the heat insulation layer mechanism and extends into the interior of the furnace body (1). The side of the furnace body (1) is connected to an exhaust pipe (16). The upper end of the exhaust pipe (16) passes through the heat insulation layer mechanism and is inserted obliquely upward. The bottom side of the interior of the furnace body (1) is provided with a bowl-holding mechanism. The upper side of the furnace body (1) is provided with a high-temperature heating mechanism. The side of the furnace body (1) is provided with a temperature measuring mechanism. The side of the furnace body (1) away from the exhaust pipe (16) is rotatably connected to a furnace door (17). An LED industrial control panel is installed on one side of the furnace body (1).

2. The high-temperature box furnace with uniform nitrogen distribution as described in claim 1, characterized in that, The container holding mechanism includes a corundum base (2) installed on the bottom insulation layer mechanism of the furnace body (1), and a sagger (3) is fixedly connected to the upper side of the corundum base (2), with the lower side of the sagger (3) located above the upper port of the air inlet pipe (8).

3. The high-temperature box furnace with uniform nitrogen distribution as described in claim 1, characterized in that, The high-temperature heating mechanism includes multiple heating boxes (5) fixedly connected to the upper side of the furnace body (1). Multiple silicon molybdenum rods (10) are installed on the bottom side of each heating box (5). The multiple silicon molybdenum rods (10) are arranged in a linear array. The lower end of each silicon molybdenum rod (10) passes downward through the heat insulation layer mechanism and extends into the furnace body (1). An electric connection mechanism is provided on the outside of each heating box (5).

4. A high-temperature box furnace with uniform nitrogen distribution as described in claim 3, characterized in that, The power connection mechanism includes a heating terminal cover (7) fixedly connected to the outside of each heating box (5), and a heating terminal (6) is installed on the inside of the heating terminal cover (7). The heating terminal (6) is electrically connected to the silicon molybdenum rod (10).

5. A high-temperature box furnace with uniform nitrogen distribution as described in claim 1, characterized in that, The temperature measuring mechanism includes a type B thermocouple (4) installed on the upper side of the furnace body (1), and the lower end of the type B thermocouple (4) extends downward into the interior of the furnace body (1).

6. A high-temperature box furnace with uniform nitrogen distribution as described in claim 1, characterized in that, The insulation layer structure includes a No. 5 insulation board (15) fixedly connected to the inner side of the furnace body (1), a No. 4 insulation board (14) fixedly connected to the side of the No. 5 insulation board (15) away from the furnace body (1), a No. 3 insulation board (13) fixedly connected to the side of the No. 4 insulation board (14) away from the No. 5 insulation board (15), a No. 2 insulation board (12) fixedly connected to the side of the No. 3 insulation board (13) away from the No. 4 insulation board (14), and a No. 1 insulation board (11) fixedly connected to the side of the No. 2 insulation board (12) away from the No. 3 insulation board (13).

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