CN212573021U - Flat plate hole array energy feedback structure for improving microwave uniformity of high-temperature furnace - Google Patents
Flat plate hole array energy feedback structure for improving microwave uniformity of high-temperature furnace Download PDFInfo
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- CN212573021U CN212573021U CN202022084773.6U CN202022084773U CN212573021U CN 212573021 U CN212573021 U CN 212573021U CN 202022084773 U CN202022084773 U CN 202022084773U CN 212573021 U CN212573021 U CN 212573021U
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Abstract
The utility model discloses a dull and stereotyped hole array is presented can structure for improving high temperature oven microwave homogeneity, it is presented can resonant cavity (3), dull and stereotyped hole array structure (4), microwave diffusion structure (5), microwave action chamber (6), high temperature furnace kiln structure (7), heated material (8) including presenting can waveguide (1), impedance matching structure (2), jumbo size microwave. The utility model has the advantages of reasonable design, thereby make microwave energy disperse and open and evenly pass through insulation material, can effectively improve the microwave field homogeneity of high temperature furnace, can solve insulation material ablation problem, insulation material's life in the extension microwave field improves the reliability of high temperature furnace long term operation, realizes the industrialization of microwave high temperature project and uses.
Description
Technical Field
The utility model belongs to the microwave high temperature oven field, concretely relates to dull and stereotyped hole array for improving high temperature oven microwave homogeneity presents can the structure for disperse microwave field intensity, improve the microwave homogeneity in solving the high temperature oven, realize the long-term industrialization of microwave high temperature oven and use.
Background
In high-temperature industrial microwave equipment, alumina ceramic fiber heat-insulating materials are generally adopted, and the materials have good high-temperature resistance, heat insulation and heat preservation performance and also generally have good wave-transmitting property at normal temperature. However, the material has obvious wave absorption phenomenon under the condition of high microwave electric field intensity, and when the working temperature of the material is increased, the wave absorption phenomenon is also intensified, so that the material is ablated and melted and cannot work normally. Therefore, in high-power high-temperature industrial microwave equipment, the energy feedback mode is reasonably designed, so that microwave energy can be dispersed and uniformly pass through the heat insulation material, the phenomenon of overhigh microwave electric field intensity distribution in local parts is avoided, the heat insulation material can be protected from being burnt by microwaves, and the method is particularly important for ensuring the operation of the microwave equipment.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model aims at overcoming prior art's not enough, provide an utilize to present can the resonant cavity surface open array hole present can the device at jumbo size microwave, compare in traditional rectangular waveguide and horn antenna present can the device, this cover is presented can the device and can be made to present can microwave energy dispersion in the waveguide to jumbo size microwave and present can the resonant cavity, then feed in microwave energy through its hole array that the surface is not of uniform size in the microwave action chamber, realize the effect that the multiple spot presented can, make microwave energy dispersion and feed in the microwave action intracavity uniformly. The position of each hole in the hole array corresponds to the position of the microwave electric field intensity wave crest in the energy feedback resonant cavity, and the microwave energy distribution in the microwave action cavity can be adjusted by adjusting the size of the hole.
The technical scheme is as follows: in order to realize the above purpose, the utility model discloses the technical scheme who takes does:
a flat plate hole array energy feedback structure for improving the microwave uniformity of a high-temperature furnace comprises an energy feedback waveguide, an impedance matching structure, a large-size microwave energy feedback resonant cavity, a microwave diffusion structure and a microwave action cavity which are sequentially communicated; a high-temperature furnace structure is arranged in the microwave action cavity, and materials to be heated are arranged in the high-temperature furnace structure;
the impedance matching structure is positioned between the energy-feeding waveguide and the large-size microwave energy-feeding resonant cavity and is used for performing impedance matching on the energy-feeding waveguide and the microwave action cavity, reducing reflection and feeding microwave energy into the microwave action cavity from the energy-feeding waveguide;
the flat plate hole array structure is arranged between the large-size microwave energy-feedback resonant cavity and the microwave action cavity, and a plurality of holes are formed in the metal surface of the flat plate hole array structure and used for uniformly feeding microwaves into the microwave action cavity from the large-size microwave energy-feedback resonant cavity; the position of the opening corresponds to the position of a microwave electric field intensity wave crest in the large-size microwave energy-feedback resonant cavity, the size of the opening influences the uniformity of microwave energy feedback, and the design can be analyzed and calculated through electromagnetic field simulation.
The microwave diffusion structure is positioned between the large-size microwave energy-feedback resonant cavity and the high-temperature kiln structure, so that microwave energy dispersed by the large-size microwave energy-feedback resonant cavity and the flat plate hole array structure can be dispersed again through the microwave diffusion structure and then enters the high-temperature kiln structure. The dispersion effect of microwave energy can be further improved, and the microwave energy feedback uniformity is improved. In addition, the microwave diffusion structure also has the effect of impedance matching and has the function of reducing reflection.
The above-mentioned plate hole array energy-feeding structure for improving microwave uniformity of a high-temperature oven is characterized in that the energy-feeding waveguide is used for transmitting microwave energy from a microwave generator to the microwave energy-feeding structure.
Preferably, the above-mentioned slab aperture array energy-feeding structure for improving microwave uniformity of a high-temperature oven has a large-sized microwave energy-feeding resonant cavity, which is larger than the energy-feeding waveguide, for dispersing the microwave energy from the more concentrated energy-feeding waveguide to a larger area; the thickness of the large-size microwave energy-feedback resonant cavity is more than half of the wavelength of the microwave, and the length and the width of the large-size microwave energy-feedback resonant cavity can be designed according to a required microwave resonant mode.
Preferably, the plate hole array energy feedback structure for improving microwave uniformity of the high-temperature oven is characterized in that the microwave action cavity is connected with the large-size microwave energy feedback resonant cavity, and the microwave energy is dispersed by the energy feedback structure and then enters the microwave action cavity through the energy feedback waveguide.
Preferably, the flat plate hole array energy feeding structure is used for improving microwave uniformity of the high-temperature furnace, and the high-temperature furnace kiln structure is mainly used for heating a heated material to 1000-1100 ℃ and completing reactions such as high-temperature smelting, reduction and the like.
Beneficial effect, compare with prior art, its apparent advantage lies in:
the utility model provides a dull and stereotyped hole array for improving high temperature furnace microwave homogeneity is presented can structure, structural design is reasonable, adopts and presents the can device of opening the array hole on jumbo size microwave and presents can the resonant cavity surface, compares in the present can device of traditional rectangular waveguide and antenna, and this structure can be through its surface different hole array with microwave energy feed-in microwave action intracavity, realizes the effect of multiple spot present can, makes microwave energy disperse and evenly feed-in microwave action intracavity; the utility model discloses thereby the structure makes microwave energy disperse to open and evenly passes through insulation material, can effectively improve the microwave field homogeneity of high temperature furnace, can solve insulation material ablation problem, and insulation material's life in the extension microwave field improves the reliability of high temperature furnace long term operation, realizes the industrialization of microwave high temperature project and uses.
Drawings
Fig. 1 is a top view of a plate hole array energy feedback structure for improving microwave uniformity of a high temperature oven provided by the present invention.
Fig. 2 is a front view of a flat plate hole array energy feedback structure for improving microwave uniformity of a high temperature oven.
Detailed Description
The present invention will be further clarified by the following description with reference to the attached drawings and specific examples, which should be understood as being merely illustrative of the present invention and not limiting the scope of the present invention, and modifications of various equivalent forms of the present invention by those skilled in the art after reading the present invention, all fall within the scope defined by the appended claims of the present application.
As shown in fig. 1 and fig. 2, a plate hole array energy feedback structure for improving microwave uniformity of a high temperature furnace is characterized by comprising an energy feedback waveguide 1, an impedance matching structure 2, a large-size microwave energy feedback resonant cavity 3, a microwave diffusion structure 5 and a microwave action cavity 6 which are sequentially communicated; a high-temperature furnace structure 7 is arranged in the microwave action cavity 6, and a material to be heated 8 is arranged in the high-temperature furnace structure 7;
the impedance matching structure 2 is positioned between the energy-feeding waveguide 1 and the large-size microwave energy-feeding resonant cavity 3, and is used for performing impedance matching on the energy-feeding waveguide 1 and the microwave action cavity 6, reducing reflection and feeding microwave energy into the microwave action cavity 6 from the energy-feeding waveguide 1;
the flat plate hole array structure 4 is arranged between the large-size microwave energy-feedback resonant cavity 3 and the microwave action cavity 6, and a plurality of holes are formed in the metal surface of the flat plate hole array structure 4 and used for uniformly feeding microwaves into the microwave action cavity 6 from the large-size microwave energy-feedback resonant cavity 3; the position of the opening corresponds to the position of the microwave electric field intensity wave crest in the large-size microwave energy-feedback resonant cavity 3, the size of the opening can influence the uniformity of microwave energy feedback, and the design can be analyzed and calculated through electromagnetic field simulation;
the microwave diffusion structure 5 is positioned between the large-size microwave energy-feedback resonant cavity 3 and the high-temperature kiln structure 7, so that microwave energy dispersed by the large-size microwave energy-feedback resonant cavity 3 and the flat plate hole array structure 4 can be dispersed again through the microwave diffusion structure 5 and then enters the high-temperature kiln structure 7. The dispersion effect of microwave energy can be further improved, and the microwave energy feedback uniformity is improved. In addition, the microwave diffusion structure also has the effect of impedance matching and has the function of reducing reflection.
Wherein the large-size microwave energy-feeding resonant cavity 3 is larger than the energy-feeding waveguide 1 in size and is used for dispersing microwave energy from the more concentrated energy-feeding waveguide 1 to a larger area; the thickness of the large-size microwave energy-feedback resonant cavity 3 is more than half of the wavelength of the microwave, and the length and the width of the large-size microwave energy-feedback resonant cavity can be designed according to a required microwave resonant mode.
The microwave action cavity 6 is connected with the large-size microwave energy-feeding resonant cavity 3, and microwave energy is dispersed through the energy-feeding structure and then enters the microwave action cavity 6 through the energy-feeding waveguide 1.
The plate hole array energy feedback mechanism for improving the microwave uniformity of the high-temperature furnace is characterized in that the high-temperature furnace kiln structure 7 is mainly used for heating a heated material 8 to 1000-1100 ℃ and completing reactions such as high-temperature smelting, reduction and the like.
The utility model provides a pair of dull and stereotyped hole array for improving high temperature furnace microwave homogeneity is presented can structure, but wide application in the heating of coking coal, through being presented can the structure of dull and stereotyped hole array, thereby disperse microwave energy and leave uniformly through insulation material, thereby solved insulation material and absorbed the problem of microwave ablation in a large number, impel microwave energy to see through insulation material and act on coking coal uniformly, improved coking coal's heating efficiency greatly, the heat time of coking coal has been shortened, the coke that obtains is of high quality.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. A flat plate hole array energy feedback structure for improving the microwave uniformity of a high-temperature furnace is characterized by comprising an energy feedback waveguide (1), an impedance matching structure (2), a large-size microwave energy feedback resonant cavity (3), a microwave diffusion structure (5) and a microwave action cavity (6) which are sequentially communicated; a high-temperature furnace structure (7) is arranged in the microwave action cavity (6), and a material (8) to be heated is arranged in the high-temperature furnace structure (7);
the impedance matching structure (2) is positioned between the energy-feeding waveguide (1) and the large-size microwave energy-feeding resonant cavity (3) and is used for performing impedance matching on the energy-feeding waveguide (1) and the microwave action cavity (6) to reduce reflection and feed microwave energy into the microwave action cavity (6) from the energy-feeding waveguide (1);
the flat plate hole array structure (4) is arranged between the large-size microwave energy-feedback resonant cavity (3) and the microwave action cavity (6), and a plurality of holes are formed in the metal surface of the flat plate hole array structure (4) and used for uniformly feeding microwaves into the microwave action cavity (6) from the large-size microwave energy-feedback resonant cavity (3);
the microwave diffusion structure (5) is positioned between the large-size microwave energy-feedback resonant cavity (3) and the high-temperature kiln structure (7), so that microwave energy dispersed by the large-size microwave energy-feedback resonant cavity (3) and the flat plate hole array structure (4) can be dispersed again through the microwave diffusion structure (5) and then enters the high-temperature kiln structure (7).
2. The planar aperture array energy feeding structure for improving microwave uniformity of a high temperature oven according to claim 1, wherein the large-sized microwave energy feeding cavity (3) is larger in size than the energy feeding waveguide (1) for dispersing the microwave energy from the more concentrated energy feeding waveguide (1) to a larger area; the thickness of the large-size microwave energy-feedback resonant cavity (3) is more than half of the wavelength of the microwave.
3. The plate hole array energy feeding structure for improving microwave uniformity of the high temperature furnace according to claim 1, wherein the microwave action cavity (6) is connected with the large-sized microwave energy feeding resonant cavity (3), and the microwave energy enters the microwave action cavity (6) through the energy feeding waveguide (1) 1 after being dispersed by the energy feeding structure.
4. The plate hole array energy feedback structure for improving microwave uniformity of the high-temperature furnace according to claim 1, wherein the high-temperature furnace kiln structure (7) heats the temperature of 1000 ℃ to 1100 ℃.
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| CN112040583A (en) * | 2020-09-22 | 2020-12-04 | 南京三乐微波技术发展有限公司 | Flat plate hole array energy feedback structure for improving microwave uniformity of high-temperature furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112040583A (en) * | 2020-09-22 | 2020-12-04 | 南京三乐微波技术发展有限公司 | Flat plate hole array energy feedback structure for improving microwave uniformity of high-temperature furnace |
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