Rapid carbonization device based on electromagnetic induction heating

Abstract

The utility model relates to the technical field of rapid carbonization devices, in particular to a rapid carbonization device based on electromagnetic induction temperature rise, which comprises an induction coil, a heating mold and an insulating shell, the induction coil is used for generating an alternating magnetic field; the heating mold is connected with the induction coil through an insulating support, and an inner cavity of the heating mold is of a hollow cylindrical structure and is used for containing a carbon material product; the insulation shell surrounds the induction coil and the heating mold and is used for insulation protection; wherein the induction coil is driven by a high-frequency power supply to generate an alternating magnetic field, the heating mold is directly inductively heated, and the heating mold radiates or conducts heat to the carbon material product through eddy current heating for directional heating. By adopting the electromagnetic induction heating technology, the carbon material product can be rapidly heated, so that the carbonization period is shortened, and the carbonization efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of rapid carbonization device technology, specifically a rapid carbonization device based on electromagnetic induction heating. Background Technology

[0002] In existing technologies, the production of carbon-carbon materials typically involves impregnating carbon fiber preforms with resin, curing them, and then carbonizing them. The carbonization process requires temperatures between 800 and 1400°C. Existing carbonization equipment is usually bulky, requiring multiple products to be carbonized for cost-effectiveness, which is unsuitable for single-piece trial production. Furthermore, the carbonization process is time-consuming, typically taking about five days, resulting in low efficiency. To prevent product oxidation, traditional carbonization equipment requires evacuation or continuous nitrogen or argon gas to maintain positive pressure, increasing both operational complexity and cost.

[0003] Therefore, there is an urgent need to develop a rapid carbonization device that is small in size, has a short carbonization cycle, does not require gas dependence, and is highly energy efficient. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a rapid carbonization device based on electromagnetic induction heating. By employing electromagnetic induction heating technology, carbon materials can be rapidly heated, thereby shortening the carbonization cycle and improving carbonization efficiency.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a rapid carbonization device based on electromagnetic induction heating, comprising:

[0006] Induction coils are used to generate alternating magnetic fields;

[0007] A heating mold is connected to the induction coil via an insulating bracket. The inner cavity of the heating mold is a hollow cylindrical structure used to hold carbon material products.

[0008] An insulating housing surrounds the induction coil and heating mold for insulation protection;

[0009] The induction coil generates an alternating magnetic field driven by a high-frequency power supply, which directly heats the heating mold. The heating mold radiates or conducts heat to the carbon material product through eddy current heating for directional heating.

[0010] Furthermore, a gap is left between the carbon material product and the inner wall of the heating mold.

[0011] Furthermore, the spacing is 3–6 mm.

[0012] Furthermore, the distance between the carbon material product and the inner wall of the heating mold forms a gas diffusion channel.

[0013] Furthermore, the heating mold is a nickel-based alloy mold.

[0014] Furthermore, the heating mold is a graphite mold, and an induction metal layer is embedded on the outer surface of the graphite mold.

[0015] By employing the above technical solution, this utility model provides a rapid carbonization device based on electromagnetic induction heating, which has at least the following beneficial effects:

[0016] 1. This application uses electromagnetic induction heating technology, which enables carbon material products to heat up rapidly, thereby shortening the carbonization cycle and improving carbonization efficiency.

[0017] 2. This application adopts a compact integrated structural design, which significantly reduces the size of the device compared to traditional large carbonization furnaces, making it more suitable for single-piece trial production and enhancing the flexibility and applicability of the equipment.

[0018] 3. The small gap between the carbon material product and the inner wall of the heating mold allows waste gas to naturally overflow within the channel, forming a positive pressure barrier that effectively blocks the infiltration of external oxygen. This prevents oxidation of the carbon material product during the carbonization process and eliminates the need for additional anti-oxidation devices such as vacuuming or continuous inert gas supply, thus reducing production costs. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application:

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

[0021] Figure 2 This is a front view of the structure of this utility model;

[0022] Figure 3 This is a partial structural diagram of the present invention.

[0023] In the diagram: 10, heating mold; 20, induction coil; 30, carbon material product; 40, insulating shell; 50, insulating support. Detailed Implementation

[0024] 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.

[0025] Please see Figure 1-3 A rapid carbonization device based on electromagnetic induction heating includes a heating mold 10, an induction coil 20, and an insulating shell 40.

[0026] The heating mold 10 and the induction coil 20 are connected by an insulating bracket 50. The inner cavity of the heating mold 10 is a hollow cylindrical structure used to hold the carbon material product 30. Specifically, the induction coil 20 is wound from one end along a spiral trajectory to the other end, ultimately forming a ring-shaped structure. The number of turns, layers, and winding density of the induction coil 20 can be determined according to the specific dimensions of the heating mold 10 and the heating requirements to achieve the best heating effect. The insulating bracket 50 has a ring-shaped frame structure with multiple ceramic support arms. The inner side of the support arms is designed with arc-shaped grooves to fit tightly against the outer surface of the induction coil 20. The wound induction coil 20 is fitted onto the outside of the heating mold 10, and its position is adjusted to be coaxial with the heating mold 10. Then, the insulating bracket 50 is fitted onto the outside of the induction coil 20, so that the arc-shaped grooves of each support arm fit tightly against the outer wall of the induction coil 20. Finally, the insulating bracket 50 is fastened to the heating mold 10.

[0027] An insulating shell 40 surrounds the induction coil 20 and the heating mold 10 for insulation protection. Specifically, the insulating shell 40 is a ceramic structure with an internal cavity that encloses the induction coil 20 and the heating mold 10. When in use, the device is placed vertically on the base, and then the heating mold 10 and the induction coil 20 are inserted axially into the cavity of the insulating shell 40. Finally, the carbon material product 30 is inserted into the induction coil 20, ensuring that the carbon material product 30 and the heating mold 10 maintain a 5mm gap.

[0028] The induction coil 20 generates an alternating magnetic field driven by a high-frequency power supply, which directly heats the heating mold 10. The heating mold 10 radiates or conducts heat to the carbon material product 30 through eddy current heating for directional heating.

[0029] This application employs electromagnetic induction heating technology, whereby the induction coil 20, driven by a high-frequency power supply, generates an alternating magnetic field to directly heat the heating mold 10. This heating method achieves directional heat transfer; that is, after the heating mold 10 generates heat through eddy currents, the heat is precisely radiated or conducted to the carbon material product 30. Compared to traditional heating methods, directional heating improves thermal efficiency and reduces energy waste. Simultaneously, because the heating process is more direct and efficient, the carbon material product 30 can quickly reach the required carbonization temperature, thereby shortening the carbonization cycle and improving production efficiency.

[0030] In some embodiments, the insulating housing 40 is made of a high-insulation material to prevent electrical breakdown. The insulating housing 40 may be made of ceramic material, which can effectively isolate the alternating magnetic field generated by the induction coil 20 from interference from the external environment.

[0031] In some embodiments, a gap is left between the carbon material product 30 and the inner wall of the heating mold 10. The gap may be about 1 mm or more, about 2 mm or more, about 3 mm or more, about 4 mm or more, about 5 mm or more, about 6 mm, and any range between and including the provided values.

[0032] In some embodiments, the carbon material product 30 is configured as a ring-shaped columnar structure, which facilitates uniform heating within the heating mold 10 and avoids localized overheating or underheating. The appropriate spacing provides an escape channel for the waste gas generated during carbonization, preventing its accumulation within the heating mold 10 and contributing to the stability of the carbonization environment. Furthermore, the spacing also helps reduce thermal stress between the carbon material product 30 and the heating mold 10, improving the carbonization quality of the carbon material product.

[0033] In some embodiments, the gap between the carbon material product 30 and the inner wall of the heating mold 10 forms a gas diffusion channel. Exhaust gas naturally overflows within the channel, forming a positive pressure barrier that effectively blocks the infiltration of external oxygen. This prevents oxidation of the carbon material product 30 during the carbonization process and eliminates the need for additional vacuuming or continuous inert gas supply devices, thus reducing production costs.

[0034] In some embodiments, the heating mold 10 is a nickel-based alloy mold, which may be Haynes 230 alloy. The carbonization temperature is 800-1400℃. Haynes 230 alloy can form a dense oxide film at high carbonization temperature, effectively preventing the oxidation process. Its excellent high-temperature strength and oxidation resistance can ensure the stability and durability of the heating mold 10 at high carbonization temperature.

[0035] In some embodiments, the heating mold 10 is a graphite mold, with an induction metal layer embedded on its outer surface. The induction metal layer is a nickel-based alloy, such as Inconel 600 alloy. The induction coil 20 heats the induction metal layer, and then heats the graphite mold through heat conduction. The heat generated by the induction coil 20 is conducted to the carbon material product 30, achieving rapid heating. Simultaneously, graphite maintains stable physical and chemical properties at high temperatures, ensuring that the heating mold 10 can be used for a long time during the carbonization process without performance degradation.

[0036] The operating steps of this rapid carbonization device based on electromagnetic induction heating include:

[0037] Start the high-frequency power supply to drive the induction coil 20 to generate an alternating magnetic field;

[0038] The heating mold 10 is heated rapidly to 800°C by eddy current heating;

[0039] Carbon material product 30 is carbonized under the heating of heating mold 10;

[0040] The waste gas generated during carbonization naturally overflows along the gas diffusion channel.

[0041] The carbon material product 30 is carbonized under the heating of the heating mold 10. Non-carbon elements escape in gaseous form through the gap between the carbon material product 30 and the inner wall of the heating mold 10. At the same time, the escaping airflow forms a positive pressure barrier, which actively blocks the infiltration of external oxygen, without the need for vacuuming or continuous introduction of inert gas.

[0042] The device uses electromagnetic induction heating technology, which enables carbon material products to heat up quickly, thereby shortening the carbonization cycle and improving carbonization efficiency.

[0043] The device features a compact, integrated structure, which significantly reduces the size of the device compared to traditional large carbonization furnaces. It also eliminates the need for vacuum pumps and gas supply pipelines, making it more suitable for single-piece trial production and enhancing the flexibility and applicability of the equipment.

[0044] It should be noted that 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.

[0045] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rapid carbonization device based on electromagnetic induction heating, characterized in that, include: Induction coil (20) is used to generate an alternating magnetic field; The heating mold (10) is connected to the induction coil (20) through an insulating bracket (50). The inner cavity of the heating mold (10) is a hollow cylindrical structure for placing carbon material products (30). An insulating housing (40) surrounds the induction coil (20) and the heating mold (10) for insulation protection; The induction coil (20) generates an alternating magnetic field driven by a high-frequency power supply, which directly heats the heating mold (10). The heating mold (10) radiates or conducts heat to the carbon material product (30) through eddy current heating for directional heating.

2. The rapid carbonization device based on electromagnetic induction heating according to claim 1, characterized in that: A gap is left between the carbon material product (30) and the inner wall of the heating mold (10).

3. The rapid carbonization device based on electromagnetic induction heating according to claim 2, characterized in that: The spacing is 3 to 6 mm.

4. The rapid carbonization device based on electromagnetic induction heating according to claim 2, characterized in that: The distance between the carbon material product (30) and the inner wall of the heating mold (10) forms a gas diffusion channel.

5. The rapid carbonization device based on electromagnetic induction heating according to claim 1, characterized in that: The heating mold (10) is a nickel-based alloy mold.

6. The rapid carbonization device based on electromagnetic induction heating according to claim 1, characterized in that: The heating mold (10) is a graphite mold, and an induction metal layer is embedded on the outer surface of the graphite mold.

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