Industrial kiln with microwave loss reducing structure

Abstract

The utility model provides an industrial kiln with a structure for reducing microwave loss, which comprises a kiln body and a plurality of microwave heating components, and the plurality of microwave heating components distributed at equal intervals are mounted on the rear side of the kiln body. The reflecting layer can be conveniently mounted and maintained in a preset shape, so that microwaves reflected by the second heat preservation layer and the hearth can be reflected and irradiate the second heat preservation layer and the hearth again, energy waste is effectively reduced, and microwave loss is reduced; the left end of the reinforcing sleeve, the left end of the reflecting layer, the left end of the second heat preservation layer and the left end of the hearth are all arranged to be of a horn-mouth-shaped structure, after microwaves enter the reflecting layer, the microwave radiation surface is expanded, the microwaves can be evenly dispersed to move towards the second heat preservation layer and the hearth, and then the purpose of evenly heating products in the hearth can be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of industrial kilns, and particularly relates to an industrial kiln with a structure for reducing microwave loss. Background Art

[0002] The unreasonable design of the internal materials and structure of the kiln can easily cause microwaves to be reflected during transmission, fail to be fully absorbed and utilized, resulting in energy waste. This reflection phenomenon is usually due to the high reflectivity of the inner wall material of the kiln to microwaves, or the irregular microwave path caused by the internal shape design of the kiln. Secondly, uneven absorption is also a significant drawback. The materials in the microwave high-temperature kiln are unevenly distributed in the microwave field, or there are large differences in the dielectric properties of the materials themselves, which will lead to uneven absorption of microwave energy, thereby affecting the heating effect of the kiln and the quality consistency of the products. This problem is mainly caused by improper material selection and unreasonable internal structure design of the kiln. Finally, microwave leakage is also a problem that cannot be ignored. During the transmission of microwaves, if the kiln has poor sealing performance or there are defects in the waveguide system, it will cause microwave energy leakage, which not only wastes energy but may also cause electromagnetic interference to the operating environment. This situation is usually caused by the loose sealing design of the kiln or the unreasonable design of the waveguide pipeline.

[0003] Conventional countermeasures include optimizing the kiln design, selecting suitable materials, and improving the sealing system. For example, by using low-reflectivity materials and optimizing the inner wall shape of the kiln, microwave reflection can be effectively reduced; by reasonably selecting and arranging microwave-absorbing materials and optimizing the dielectric properties and distribution of the materials, the problem of uneven microwave absorption can be improved; by improving the kiln sealing design, using high-quality sealing materials and optimizing the waveguide system, microwave leakage can be effectively prevented. However, these methods also have certain drawbacks. Although optimizing the kiln design and selecting suitable materials can reduce microwave loss, it will increase the initial construction cost and material cost; although improving the sealing system and waveguide system can effectively prevent microwave leakage, it also requires additional equipment investment and maintenance costs, and the long-term stability and reliability of the sealing system need to be continuously monitored and maintained; in addition, reasonably selecting and arranging microwave-absorbing materials requires professional technical support and precise design schemes, increasing the complexity of design and operation. Therefore, we hope to design an industrial kiln with a new structure to solve this problem. Summary of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide an industrial kiln with a structure for reducing microwave loss, and solve the problems raised in the above background art.

[0005] The present utility model is realized through the following technical solutions: An industrial furnace with a structure for reducing microwave loss, comprising: a furnace body and a microwave heating assembly. A plurality of equally spaced microwave heating assemblies are installed at the rear side of the furnace body. The furnace body includes a furnace shell, a first thermal insulation layer, and a reinforcing sleeve;

[0006] A first thermal insulation layer is arranged inside the furnace shell. The inner wall of the first thermal insulation layer is fixedly connected to the outer wall of the reinforcing sleeve. A reflection layer is arranged on the inner wall of the reinforcing sleeve. The inner part of the reflection layer is fixedly connected to the outer wall of the second thermal insulation layer;

[0007] The microwave heating assembly includes a magnetron and a waveguide. The lower side of the magnetron is fixedly connected to the outer end of the waveguide.

[0008] As a preferred embodiment, the materials of the first thermal insulation layer and the second thermal insulation layer are the same. The cross-section of the left end of the reinforcing sleeve is arranged in a flared structure. The left end of the reinforcing sleeve is fixedly connected to the inner end of the waveguide. In actual use, a ceramic fiber layer can be used, but it is not limited to this one thermal insulation material. Other suitable materials can be selected as the thermal insulation material according to needs and budget.

[0009] As a preferred embodiment, a flared reflection part is arranged at the left end of the reflection layer, and a semi-circular reflection part is arranged at the right end of the reflection layer. The flared reflection part fits with the inner wall of the left end of the reinforcing sleeve, and the structure of the flared reflection part is the same as that of the left end of the reinforcing sleeve. The setting of the reflection layer can reflect the microwaves reflected by the second thermal insulation layer and the furnace chamber, avoiding energy waste caused by a large amount of microwaves being reflected without playing a heating role.

[0010] As a preferred embodiment, the semi-circular reflection part fits with the inner wall of the right end of the reinforcing sleeve. The cross-section of the semi-circular reflection part is in a semi-circular structure, and the structure of the semi-circular reflection part is the same as that of the left end of the reinforcing sleeve.

[0011] As a preferred embodiment, the reflection layer is a kind of graphite foil. The left end of the flared reflection part is hermetically connected to the edge of the inner end of the waveguide.

[0012] As a preferred embodiment, a fitting part is arranged at the left end of the second thermal insulation layer. A furnace chamber is arranged inside the second thermal insulation layer. A flared wall is arranged at the left end of the furnace chamber. The structures of the fitting part and the flared wall are the same as the structure of the flared reflection part. A conveying roller frame is arranged inside the furnace chamber.

[0013] After adopting the above technical solution, the beneficial effects of the present utility model are as follows: By arranging a reinforcing sleeve inside the kiln body, and the reinforcing sleeve is placed between the first heat-insulating layer and the second heat-insulating layer, it can support the first heat-insulating layer and the second heat-insulating layer, and at the same time facilitate the installation of the reflective layer to maintain its predetermined shape. Furthermore, it can enhance the reflection of the microwaves reflected by the second heat-insulating layer and the furnace chamber, making them irradiate the second heat-insulating layer and the furnace chamber again, effectively reducing energy waste and minimizing microwave loss.

[0014] By setting the left ends of the reinforcing sleeve, the reflective layer, the second heat-insulating layer, and the furnace chamber into a structure similar to a flared opening, after the microwaves enter the inside of the reflective layer, the microwave radiation surface is enlarged, enabling the microwaves to disperse and move evenly towards the second heat-insulating layer and the furnace chamber. Thus, the purpose of uniformly heating the products inside the furnace chamber can be achieved. And by setting the right ends of the reinforcing sleeve and the reflective layer into a semi-circular structure, it can evenly disperse and reflect the microwaves reaching the right end position of the reflective layer to the right ends of the second heat-insulating layer and the furnace chamber, while reducing microwave loss and enhancing the uniformity of microwave heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic diagram of the overall structure of an industrial kiln with a structure for reducing microwave loss according to the present utility model.

[0017] Figure 2 It is a schematic diagram of the internal structure of an industrial kiln with a structure for reducing microwave loss according to the present utility model.

[0018] In the figure, 100 - kiln body, 110 - furnace shell, 120 - first heat-insulating layer, 130 - reinforcing sleeve, 140 - reflective layer, 141 - horn reflective part, 142 - semi-circular reflective part, 150 - second heat-insulating layer, 151 - fitting part, 160 - furnace chamber, 161 - horn wall, 170 - conveying roller rack;

[0019] 200 - microwave heating assembly, 210 - magnetron, 220 - waveguide. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1 to 2 , the present invention provides a technical solution: an industrial kiln with a structure for reducing microwave loss, including: a kiln body 100 and a microwave heating assembly 200. A plurality of microwave heating assemblies 200 are installed at equal intervals on the rear side of the kiln body 100. The kiln body 100 includes a furnace shell 110, a first heat insulation layer 120, and a reinforcing sleeve 130;

[0022] The first heat insulation layer 120 is arranged inside the furnace shell 110. The inner wall of the first heat insulation layer 120 is fixedly connected to the outer wall of the reinforcing sleeve 130. A reflection layer 140 is arranged on the inner wall of the reinforcing sleeve 130. The inner part of the reflection layer 140 is fixedly connected to the outer wall of the second heat insulation layer 150;

[0023] The microwave heating assembly 200 includes a magnetron 210 and a waveguide 220. The lower side of the magnetron 210 is fixedly connected to the outer end of the waveguide 220.

[0024] Please refer to Figures 1 to 2 , the materials of the first heat insulation layer 120 and the second heat insulation layer 150 are the same. The cross-section of the left end of the reinforcing sleeve 130 is arranged in a flared structure. The left end of the reinforcing sleeve 130 is fixedly connected to the inner end of the waveguide 220. In actual use, a ceramic fiber layer can be used, but it is not limited to this one kind of heat insulation material. Other suitable materials can be selected as the heat insulation material according to needs and budgets.

[0025] A horn reflection part 141 is arranged at the left end of the reflection layer 140, and a semi-circular reflection part 142 is arranged at the right end of the reflection layer 140. The horn reflection part 141 fits with the inner wall of the left end of the reinforcing sleeve 130, and the horn reflection part 141 has the same structure as the left end of the reinforcing sleeve 130. The arrangement of the reflection layer 140 can reflect the microwaves reflected by the second heat insulation layer 150 and the furnace chamber 160, avoiding energy waste caused by a large amount of microwaves being reflected without playing a heating role.

[0026] As the first embodiment of the present utility model, by arranging a reinforcing sleeve 130 inside the kiln body 100, in actual use, the reinforcing sleeve 130 is placed between the first heat-insulating layer 120 and the second heat-insulating layer 150, which can support the first heat-insulating layer 120 and the second heat-insulating layer 150, and at the same time is convenient for installing the reflective layer 140 to maintain its predetermined shape. Furthermore, it can enhance the reflection of the microwaves reflected away by the second heat-insulating layer 150 and the furnace chamber 160, so that they can irradiate the second heat-insulating layer 150 and the furnace chamber 160 again, effectively reducing energy waste and reducing microwave loss.

[0027] Please refer to Figure 2 , the semi-circular reflection part 142 fits against the inner wall of the right end of the reinforcing sleeve 130. The cross-section of the semi-circular reflection part 142 is in a semi-circular structure, and the structure of the semi-circular reflection part 142 is the same as that of the left end of the reinforcing sleeve 130.

[0028] The reflective layer 140 is a kind of graphite foil, and the left end of the horn reflection part 141 is hermetically connected to the inner edge of the guide wave tube 220.

[0029] The left end of the second heat-insulating layer 150 is provided with a fitting part 151. The furnace chamber 160 is arranged inside the second heat-insulating layer 150. The left end of the furnace chamber 160 is provided with a horn wall 161. The structures of the fitting part 151 and the horn wall 161 are the same as the structure of the horn reflection part 141. The conveying roller frame 170 is arranged inside the furnace chamber 160.

[0030] As the second embodiment of the present utility model, based on the first embodiment, by setting the left ends of the reinforcing sleeve 130, the reflective layer 140, the second heat-insulating layer 150, and the left end of the furnace chamber 160 into a similar horn-shaped structure, after the microwaves enter the reflective layer 140, the microwave radiation surface is enlarged, which can make the microwaves disperse and move evenly towards the second heat-insulating layer 150 and the furnace chamber 160. Furthermore, the purpose of evenly heating the products inside the furnace chamber 160 can be achieved. And by setting the right ends of the reinforcing sleeve 130 and the reflective layer 140 into a semi-circular structure, the microwaves reaching the right end position of the reflective layer 140 can be evenly dispersed and reflected to the right ends of the second heat-insulating layer 150 and the furnace chamber 160, while reducing microwave loss and improving the uniformity of microwave heating.

[0031] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An industrial furnace with a structure for reducing microwave loss, comprising: A kiln body (100) and a microwave heating assembly (200), characterized in that a plurality of equally spaced microwave heating assemblies (200) are installed at the rear side of the kiln body (100), and the kiln body (100) includes a furnace shell (110), a first heat insulation layer (120) and a reinforcing sleeve (130); A first heat insulation layer (120) is arranged inside the furnace shell (110), the inner wall of the first heat insulation layer (120) is fixedly connected to the outer wall of the reinforcing sleeve (130), a reflection layer (140) is arranged on the inner wall of the reinforcing sleeve (130), and the outer wall of a second heat insulation layer (150) is fixedly connected to the inside of the reflection layer (140); The microwave heating assembly (200) includes a magnetron (210) and a waveguide (220), and the lower side of the magnetron (210) is fixedly connected to the outer end of the waveguide (220).

2. An industrial kiln furnace with a structure for reducing microwave loss as described in claim 1, characterized in that: The material of the first heat insulation layer (120) is the same as that of the second heat insulation layer (150), the cross-section of the left end of the reinforcing sleeve (130) is arranged in a flared structure, and the left end of the reinforcing sleeve (130) is fixedly connected to the inner end of the waveguide (220).

3. The industrial kiln furnace with a structure for reducing microwave loss according to claim 2, characterized in that: A horn reflection part (141) is arranged at the left end of the reflection layer (140), a semi-circular reflection part (142) is arranged at the right end of the reflection layer (140), the horn reflection part (141) is attached to the inner wall of the left end of the reinforcing sleeve (130), and the horn reflection part (141) has the same structure as the left end of the reinforcing sleeve (130).

4. An industrial furnace with a structure for reducing microwave loss according to claim 3, characterized in that: The semi-circular reflection part (142) is attached to the inner wall of the right end of the reinforcing sleeve (130), the cross-section of the semi-circular reflection part (142) is in a semi-circular structure, and the semi-circular reflection part (142) has the same structure as the left end of the reinforcing sleeve (130).

5. An industrial furnace with a structure for reducing microwave loss as claimed in claim 4, characterized in that: The reflection layer (140) is a kind of graphite foil, and the left end of the horn reflection part (141) is hermetically connected to the edge of the inner end of the waveguide (220).

6. The industrial furnace with a structure for reducing microwave loss as described in claim 5, wherein: A fitting part (151) is arranged at the left end of the second heat insulation layer (150), a furnace chamber (160) is arranged inside the second heat insulation layer (150), a horn wall (161) is arranged at the left end of the furnace chamber (160), the structures of the fitting part (151) and the horn wall (161) are the same as the structure of the horn reflection part (141), and a conveying roller frame (170) is arranged inside the furnace chamber (160).

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