A high-power horizontal cylindrical high-temperature microwave melting device

Abstract

This invention belongs to the field of microwave device technology, and particularly relates to a high-power horizontal cylindrical high-temperature microwave melting apparatus, comprising a microwave vacuum cavity, a microwave generating system, a heat preservation structure, and a control system. The microwave vacuum cavity is a horizontal cylindrical structure. The microwave generating system includes multiple microwave generating devices arranged in a fan shape at the top of the microwave vacuum cavity. The heat preservation structure is located inside the microwave vacuum cavity and includes specially designed heat preservation components and an internal heat preservation module. The control system includes a temperature monitoring unit and a touch processing unit. The temperature monitoring unit is located at the top of the microwave vacuum cavity and corresponds to the melting space. The touch processing unit is electrically connected to both the microwave generating devices and the temperature monitoring unit. By controlling the position, number, and power of the activated microwave generating devices, a uniform distribution of the electromagnetic field and temperature field inside the heat preservation cavity structure can be achieved, thereby effectively improving the microwave heating efficiency of the material.

Description

Technical Field

[0001] This invention belongs to the field of microwave device technology, and particularly relates to a high-power horizontal cylindrical high-temperature microwave melting device. Background Technology

[0002] Microwave heating is a novel heating method based on the interaction between electromagnetic fields and matter. Its frequency typically ranges from 300 MHz to 300 GHz, with 2.45 GHz and 915 MHz commonly used in industry. Unlike traditional resistance heating and gas heating, microwave heating can directly penetrate the medium and generate frictional heat within the material through dipole polarization and free charge migration, achieving "volume heating." It offers advantages such as rapid heating, low thermal inertia, and high controllability. In fields such as high-performance ceramics, refractory materials, and metal smelting, microwave heating has shown potential for shortening process cycles, refining grain size, and improving material properties.

[0003] However, existing microwave melting equipment still has significant shortcomings in practical applications: First, a single microwave source or simple layout leads to uneven electromagnetic field distribution, easily causing localized overheating or heating blind spots, affecting product quality; second, traditional heating methods have high energy consumption and limited heating rates, making it difficult to meet the efficiency and temperature control accuracy requirements of high-temperature melting; third, high-temperature melting under normal air pressure easily causes material oxidation, reducing material properties; and fourth, the temperature control system has a slow response, making it difficult to achieve precise management throughout the entire process. These problems restrict the widespread application of microwave melting technology in industrial production.

[0004] Therefore, there is an urgent need for a high-power horizontal cylindrical high-temperature microwave melting device to solve this problem. Summary of the Invention

[0005] The purpose of this invention is to provide a high-power horizontal cylindrical high-temperature microwave melting device to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides the following solution: a high-power horizontal cylindrical high-temperature microwave melting device, comprising a microwave vacuum cavity, a microwave generating system, a heat preservation structure, and a control system; The microwave vacuum cavity is a horizontal cylindrical structure with a vacuum furnace door at one end, forming a sealed melting space inside. The microwave generating system includes multiple microwave generating devices, which are arranged in a fan shape at the top of the microwave vacuum cavity. The microwave generating devices are connected to the inside of the microwave vacuum cavity through waveguides and vacuum sealing flanges, and are used to radiate microwaves into the melting space. The insulation structure is located inside the microwave vacuum cavity. The insulation structure includes a specially designed insulation structural component and an inner insulation module, which together form a double-layer insulation system. The control system includes a temperature monitoring unit and a touch processing unit. The temperature monitoring unit is located at the top of the microwave vacuum cavity and corresponds to the melting space. The touch processing unit is electrically connected to the microwave generator and the temperature monitoring unit, respectively, and is used to adjust the power and distribution of the microwave output according to the real-time temperature feedback.

[0007] According to the present invention, a high-power horizontal cylindrical high-temperature microwave melting device is provided, wherein the microwave vacuum cavity includes a stainless steel outer shell and an iron inner shell fixedly connected to the inner wall of the stainless steel outer shell. Microwave feed ports are correspondingly opened on the side walls of the stainless steel outer shell and the iron inner shell. The microwave generating device is fixed to the outside of the stainless steel outer shell by bolts and connected to the microwave feed ports.

[0008] According to the present invention, a high-power horizontal cylindrical high-temperature microwave melting device is provided, wherein the stainless steel outer shell has a thickness of 1.1 mm, a length of 800 mm, and a radius of 400 mm; and the iron inner shell has a thickness of 5 mm and a height of 790 mm.

[0009] According to the present invention, a high-power horizontal cylindrical high-temperature microwave melting device is provided, wherein the microwave generating device includes a copper cast waveguide and an aluminum magnetron, the aluminum magnetron is disposed at the end of the copper cast waveguide, and the feed port end of the copper cast waveguide extends through the microwave feed port into the microwave vacuum cavity.

[0010] According to the present invention, a high-power horizontal cylindrical high-temperature microwave melting device is provided, wherein the microwave generator emits microwaves at a frequency of 2.45 GHz.

[0011] According to the present invention, a high-power horizontal cylindrical high-temperature microwave melting device is provided, wherein the specially designed heat-insulating structural component is made of alumina fiber and is disposed inside the microwave vacuum cavity. The specially designed heat-insulating structural component has a diameter of 400mm, a thickness of 50mm, and an inner cavity volume of 200mm×200mm×200mm.

[0012] According to the present invention, a high-power horizontal cylindrical high-temperature microwave melting device is provided, wherein the inner insulation module is made of mullite and is disposed inside the specially designed insulation structure, and surrounds the sintering crucible and auxiliary heating material.

[0013] According to the present invention, a high-power horizontal cylindrical high-temperature microwave melting device is provided, wherein the vacuum furnace door adopts a sandwich composite structure, the inner layer of the vacuum furnace door is an aluminum alloy honeycomb, the outer layer is covered with a stainless steel plate with a thickness of 1.1mm, the overall thickness of the vacuum furnace door is 10mm, and the vacuum furnace door is provided with a detachable handle.

[0014] A high-power horizontal cylindrical high-temperature microwave melting apparatus based on the present invention further includes a high-voltage switching power supply, which is located directly below the microwave vacuum cavity and is used to provide power support for the microwave generating device.

[0015] According to the present invention, a high-power horizontal cylindrical high-temperature microwave melting device is provided, wherein the touch processing unit integrates a temperature curve display function and an over-temperature alarm function, and can automatically control the start-up and shutdown and power ratio of each microwave generator according to a preset heating program.

[0016] Compared with the prior art, the present invention has the following advantages and technical effects: This invention controls the position, number, and power of the activated microwave generators to achieve a uniform distribution of the electromagnetic and temperature fields inside the insulation cavity structure, thereby effectively improving the microwave heating efficiency of materials. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is the left view of the present invention; Figure 2 This is the front view of the present invention; Figure 3 This is a material temperature rise curve according to an embodiment of the present invention.

[0019] The components include: 1. Vacuum furnace door; 2. Microwave generator; 3. Waveguide and vacuum sealing flange; 4. Microwave vacuum cavity; 5. Vacuum pump assembly; 6. High-voltage switching power supply; 7. High-temperature infrared thermometer; 8. Specially designed insulation structural components; 9. Internal insulation module; 10. Sintering crucible; 11. Auxiliary heating material; and 12. Control system. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Reference Figures 1 to 3 As shown, the present invention provides a high-power horizontal cylindrical high-temperature microwave melting device, including a microwave vacuum cavity 4, a microwave generating system, a heat preservation structure and a control system 12; The microwave vacuum cavity 4 is a horizontal cylindrical structure with a vacuum furnace door 1 at one end, forming a sealed melting space inside. The microwave generating system includes multiple microwave generating devices 2, which are arranged in a fan shape on the top of the microwave vacuum cavity 4. The microwave generating devices 2 are connected to the inside of the microwave vacuum cavity 4 through waveguides and vacuum sealing flanges 3, and are used to radiate microwaves into the melting space. The insulation structure is located inside the microwave vacuum cavity 4. The insulation structure includes a specially made insulation structural component 8 and an inner insulation module 9, which together form a double-layer insulation system. The control system 12 includes a temperature monitoring unit and a touch processing unit. The temperature monitoring unit is located at the top of the microwave vacuum cavity 4 and corresponds to the melting space. The touch processing unit is electrically connected to the microwave generator 2 and the temperature monitoring unit, respectively, and is used to adjust the power and distribution of the microwave output according to the real-time temperature feedback.

[0023] Furthermore, the microwave vacuum cavity 4 includes a stainless steel outer shell and an iron inner shell fixedly connected to the inner wall of the stainless steel outer shell. Microwave feed ports are correspondingly opened on the side walls of the stainless steel outer shell and the iron inner shell. The microwave generator 2 is fixed to the outside of the stainless steel outer shell by bolts and connected to the microwave feed port.

[0024] Furthermore, the stainless steel outer shell is 1.1mm thick, 800mm long, and 400mm in radius; the iron inner shell is 5mm thick and 790mm high.

[0025] Furthermore, the microwave generator 2 includes a copper cast waveguide and an aluminum magnetron. The aluminum magnetron is located at the end of the copper cast waveguide, and the feed port of the copper cast waveguide extends into the microwave vacuum cavity 4 through the microwave feed port.

[0026] Furthermore, the microwave generator 2 emits microwaves at a frequency of 2.45 GHz.

[0027] Furthermore, the special insulation structural component 8 is made of alumina fiber and is installed inside the microwave vacuum cavity 4. The special insulation structural component 8 has a diameter of 400mm, a thickness of 50mm, and an internal cavity volume of 200mm×200mm×200mm.

[0028] Furthermore, the inner insulation module 9 is made of mullite and is located inside the specially designed insulation structure 8. The inner insulation module 9 surrounds the sintering crucible 10 and the auxiliary heating material 11.

[0029] Furthermore, the vacuum furnace door 1 adopts a sandwich composite structure. The inner layer of the vacuum furnace door 1 is made of aluminum alloy honeycomb, and the outer layer is covered with a stainless steel plate with a thickness of 1.1mm. The overall thickness of the vacuum furnace door 1 is 10mm, and a detachable handle is provided on the vacuum furnace door 1.

[0030] Furthermore, it also includes a high-voltage switching power supply 6, which is located directly below the microwave vacuum cavity 4 and is used to provide power support for the microwave generator 2.

[0031] Furthermore, the touch processing unit integrates a temperature curve display function and an over-temperature alarm function, and can automatically control the start-up and shutdown of each microwave generator and the power ratio according to the preset heating program.

[0032] Example: The microwave vacuum cavity 4 is a horizontal cylindrical structure, consisting of a stainless steel outer shell and an inner iron shell fixedly connected to it. The stainless steel outer shell is 1.1 mm thick, 800 mm long, and 400 mm in radius. The inner iron shell is 5 mm thick and 790 mm high. Microwave feed ports and screw holes are correspondingly provided on the side walls of both. The vacuum furnace door 1 is installed on the side of the stainless steel outer shell via hinges. It is 10 mm thick, adopts an aluminum alloy honeycomb sandwich structure, and is covered with a 1.1 mm thick stainless steel plate. It is equipped with a detachable handle for sealing the melting space.

[0033] Four microwave generators 2 are fixedly mounted in a fan shape on top of the microwave vacuum cavity 4 via waveguides and vacuum-sealed flanges 3. Each microwave generator 2 consists of a cast copper waveguide and an aluminum magnetron. The cast copper waveguide is fixed to the outer wall of the cavity with bolts, and its feed port is connected to the microwave feed port on the cavity. The microwave frequency is 2.45 GHz, used to radiate energy into the cavity. A high-voltage switching power supply 6 is located directly below the entire device, providing high-voltage power support for the microwave generators 2.

[0034] The microwave vacuum cavity 4 has a double-layer insulation structure on its inner side. The special insulation structure 8 is made of alumina fiber and is fitted inside the iron inner shell. It has a diameter of 400 mm, a thickness of 50 mm, an inner cavity volume of 200 mm × 200 mm × 200 mm, and a bulk density of 1.3-1.8 g / cm³. The inner insulation module 9 is made of mullite material and is arranged in the melting zone. It is close to the inner wall of the special insulation structure 8 and surrounds the sintering crucible 10 and the auxiliary heating material 11 to form a highly efficient heat insulation layer.

[0035] The temperature monitoring and control system includes a high-temperature infrared thermometer 7 and a control system 12. The high-temperature infrared thermometer 7 is fixedly installed at the top of the microwave vacuum cavity 4 to monitor the temperature of the material in the melting zone in real time. The control system 12 is fixedly installed on the side of the microwave vacuum cavity 4 and is electrically connected to the high-temperature infrared thermometer 7 and the microwave generator 2, respectively. It has functions such as power adjustment, on / off control, temperature alarm, maximum temperature limit, and temperature-time curve display. The vacuum pump group 5 is connected to the microwave vacuum cavity 4 and is used to evacuate the melting zone to the required vacuum level.

[0036] During operation, the vacuum furnace door 1 is opened, the material is placed in the sintering crucible 10, and the vacuum furnace door 1 is closed before starting the vacuum pump group 5 to evacuate the system. The operator sets the activation position, quantity, and power of the microwave generator 2 via the control system 12, and also sets the maximum temperature limit. After the system starts, the microwaves generated by the microwave generator 2 are fed into the cavity through a waveguide. The material is heated in bulk under the action of the microwave field. The high-temperature infrared thermometer 7 provides real-time temperature data feedback, and the control system 12 dynamically adjusts the microwave output based on the feedback results to ensure that the material completes melting according to the preset heating curve, thereby achieving the technical effects of uniform heating, high efficiency, and precise temperature control.

[0037] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0038] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope of the present invention.

Claims

1. A high-power horizontal cylindrical high-temperature microwave melting device, characterized in that, Includes a microwave vacuum cavity (4), a microwave generating system, a thermal insulation structure, and a control system (12). The microwave vacuum cavity (4) is a horizontal cylindrical structure with a vacuum furnace door (1) at one end, forming a sealed melting space inside. The microwave generating system includes multiple microwave generating devices (2), which are arranged in a fan shape on the top of the microwave vacuum cavity (4). The microwave generating devices (2) are connected to the inside of the microwave vacuum cavity (4) through waveguides and vacuum sealing flanges (3). The heat insulation structure is disposed inside the microwave vacuum cavity (4), and the heat insulation structure includes a special heat insulation structural component (8) and an inner heat insulation module (9). The control system (12) includes a temperature monitoring unit and a touch processing unit. The temperature monitoring unit is located on the top of the microwave vacuum cavity (4) and corresponds to the melting space. The touch processing unit is electrically connected to the microwave generator (2) and the temperature monitoring unit, respectively.

2. The high-power horizontal cylindrical high-temperature microwave melting device according to claim 1, characterized in that, The microwave vacuum cavity (4) includes a stainless steel outer shell and an iron inner shell fixedly connected to the inner wall of the stainless steel outer shell. Microwave feed ports are correspondingly opened on the side walls of the stainless steel outer shell and the iron inner shell. The microwave generator (2) is fixed to the outside of the stainless steel outer shell by bolts and connected to the microwave feed port.

3. The high-power horizontal cylindrical high-temperature microwave melting apparatus according to claim 2, characterized in that, The stainless steel outer shell has a thickness of 1.1 mm, a length of 800 mm, and a radius of 400 mm; the iron inner shell has a thickness of 5 mm and a height of 790 mm.

4. A high-power horizontal cylindrical high-temperature microwave melting device according to claim 2, characterized in that, The microwave generator (2) includes a copper-cast waveguide and an aluminum magnetron. The aluminum magnetron is located at the end of the copper-cast waveguide, and the feed port of the copper-cast waveguide extends through the microwave feed port into the microwave vacuum cavity (4).

5. A high-power horizontal cylindrical high-temperature microwave melting apparatus according to claim 2, characterized in that, The microwave generator (2) emits microwaves at a frequency of 2.45 GHz.

6. The high-power horizontal cylindrical high-temperature microwave melting apparatus according to claim 1, characterized in that, The special thermal insulation component (8) is made of alumina fiber. The special thermal insulation component (8) is located inside the microwave vacuum cavity (4). The special thermal insulation component (8) has a diameter of 400mm, a thickness of 50mm, and an inner cavity volume of 200mm×200mm×200mm.

7. A high-power horizontal cylindrical high-temperature microwave melting apparatus according to claim 1, characterized in that, The inner insulation module (9) is made of mullite. The inner insulation module (9) is located inside the special insulation structure (8). The inner insulation module (9) surrounds the outside of the sintering crucible (10) and the auxiliary heating material (11).

8. A high-power horizontal cylindrical high-temperature microwave melting apparatus according to claim 1, characterized in that, The vacuum furnace door (1) adopts a sandwich composite structure. The inner layer of the vacuum furnace door (1) is an aluminum alloy honeycomb, and the outer layer is covered with a stainless steel plate with a thickness of 1.1mm. The overall thickness of the vacuum furnace door (1) is 10mm. The vacuum furnace door (1) is equipped with a detachable handle.

9. A high-power horizontal cylindrical high-temperature microwave melting apparatus according to claim 1, characterized in that, It also includes a high-voltage switching power supply (6), which is located directly below the microwave vacuum cavity (4) and is used to provide power support for the microwave generator (2).

10. A high-power horizontal cylindrical high-temperature microwave melting apparatus according to claim 1, characterized in that, The touch processing unit integrates temperature curve display and over-temperature alarm functions, and can automatically control the start-up and power ratio of each microwave generator according to the preset heating program.

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