A multi-layered composite kiln roof structure

Abstract

The utility model discloses a kind of multilayer composite kiln top structure, it is related to kiln equipment technical field, including: protective support structure, metal reflecting layer, vacuum shell, refractory material layer, heat-insulating fiber, protective support structure is connected with kiln fixed support surface and play the supporting role;High reflectivity coating is coated on the lower surface of metal reflecting layer, metal reflecting layer is connected in the lower side of protective support structure;Vacuum shell is connected with metal reflecting layer, vacuum cavity is provided in vacuum shell, vacuum cavity is connected with the vacuum maintaining device for extracting air in vacuum cavity;Refractory material layer is composed of refractory ceramic material, is connected in the lower side of vacuum shell;Heat-insulating fiber is filled between refractory material layer and vacuum shell, plays the heat-insulating effect.The utility model can effectively keep the temperature in furnace.

Description

Technical Field

[0001] This utility model relates to the field of kiln equipment technology, and in particular to a multi-layer composite kiln roof structure. Background Technology

[0002] Kilns are widely used for heating and heat preservation in industrial production and daily life. Currently, the interior of the kiln roof is constructed directly with refractory materials, typically in an arched or hemispherical shape. However, existing kiln roof structures often fail to effectively maintain the furnace temperature, leading to heat loss. This not only increases energy consumption but also reduces production efficiency. Furthermore, the kiln roof is directly exposed to the high temperatures inside the furnace, experiencing the most severe heating. Over time, this weakens the refractory material, causing the roof to collapse, reducing the kiln's lifespan, and increasing maintenance costs. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a multi-layer composite kiln roof structure that can effectively maintain the temperature inside the furnace.

[0004] A multi-layer composite kiln roof structure according to a first aspect of this utility model is used to seal the top of a kiln, comprising: a protective support structure, a metal reflective layer, a vacuum shell, a high-temperature resistant material layer, and heat-insulating fibers. The protective support structure is connected to the fixed support surface of the kiln and provides support. The lower surface of the metal reflective layer is coated with a high-reflectivity coating, and the metal reflective layer is connected to the lower side of the protective support structure. The vacuum shell is connected to the metal reflective layer, and a vacuum cavity is provided inside the vacuum shell. The vacuum cavity is connected to a vacuum holding device for extracting air from the vacuum cavity. The high-temperature resistant material layer is made of high-temperature resistant ceramic material and is connected to the lower side of the vacuum shell. The heat-insulating fibers fill the space between the high-temperature resistant material layer and the vacuum shell, providing heat insulation.

[0005] According to some embodiments of this utility model, a plurality of support blocks are provided inside the vacuum cavity.

[0006] According to some embodiments of the present invention, the high-temperature resistant material layer includes multiple high-temperature resistant ceramic blocks and multiple hooks. The hooks are connected to the upper end of the high-temperature resistant ceramic blocks, and multiple hanging rings are connected to the lower side of the vacuum shell. The hooks are hung on the corresponding hanging rings.

[0007] According to some embodiments of the present invention, a groove is provided on the side of the high-temperature resistant ceramic block, and a boss is provided on the side of the high-temperature resistant ceramic block. The boss on the high-temperature resistant ceramic block is embedded in the groove on the connected high-temperature resistant ceramic block.

[0008] According to some embodiments of the present invention, the metal reflective layer is provided with a plurality of cooling channels, and the cooling channels are connected to a water pump, which is used to inject cold water into the cooling channels to absorb the heat of the metal reflective layer.

[0009] According to some embodiments of the present invention, the protective support structure is bolted to the metal reflective layer.

[0010] According to some embodiments of the present invention, the metal reflective layer and the vacuum housing are welded together by a bracket.

[0011] According to some embodiments of the present invention, the vacuum maintaining device includes a vacuum pump and a valve. The vacuum pump is connected to the vacuum chamber through a pipe. The vacuum pump is used to extract air from the vacuum chamber. The valve is connected to the pipe. After the vacuum pump stops, the valve closes to maintain the vacuum level in the vacuum chamber.

[0012] According to some embodiments of the present invention, the vacuum holding device further includes a vacuum sensor, which is disposed in the vacuum chamber to monitor the vacuum level in the vacuum chamber.

[0013] According to some embodiments of this utility model, the protective support structure is composed of steel profiles and high-temperature resistant ceramic plates.

[0014] According to an embodiment of the present invention, a multi-layer composite kiln roof structure has at least the following beneficial effects: (1) The composite structure of vacuum shell, metal reflective layer and heat insulation fiber is adopted, which effectively reduces heat loss from the furnace top and reduces energy consumption; (2) The high-temperature resistant ceramic blocks are hung on the lower side of the vacuum shell by hooks, which can be easily replaced when damaged. The high-temperature resistant material layer is composed of multiple high-temperature resistant ceramic blocks, so only some of the damaged high-temperature resistant ceramic blocks can be replaced, thus improving the economy of maintenance. (3) The metal reflective layer is cooled by water cooling to keep the temperature of the protective support structure normal.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a cross-sectional schematic diagram of the installation structure according to an embodiment of the present utility model; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 for Figure 1 Enlarged view of point B in the middle; Figure 4 This is a schematic diagram of one embodiment of the present invention.

[0017] Icon labels: Kiln 100; Protective support structure 200; Metal reflective layer 300, cooling channel 310, water pump 320; Vacuum housing 400, hanging ring 401, vacuum chamber 410, support block 411, vacuum holding device 420, vacuum pump 421, valve 422, pipeline 423, vacuum sensor 424; High-temperature resistant material layer 500, high-temperature resistant ceramic block 510, groove 511, boss 512, hook 520; 600 heat insulation fiber; Bracket 700. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] Reference Figures 1 to 4As shown, one embodiment of this utility model discloses a multi-layer composite kiln roof structure for sealing the top of a kiln 100. It includes: a protective support structure 200, a metal reflective layer 300, a vacuum shell 400, a high-temperature resistant material layer 500, and heat-insulating fiber 600. The protective support structure 200 is connected to the fixed support surface of the kiln 100, providing support. Located at the very top of the kiln 100, the protective support structure 200 effectively protects the internal structure of the kiln 100 below from external environmental influences. The protective support structure 200 also provides support for the structure below. The lower surface of the metal reflective layer 300 is coated with a high-reflectivity coating and is chrome-plated to improve its reflectivity. This effectively reflects heat back into the kiln, improving thermal efficiency and preventing heat loss to the outside of the kiln roof. The metal reflective layer 300 is fixedly connected to the lower side of the protective support structure 200. The vacuum shell 400 is fixedly connected to the metal reflective layer 300 and is formed by welding steel plates. A vacuum chamber 410 is provided inside the vacuum shell 400. The vacuum chamber 410 is connected to a vacuum maintaining device 420 for extracting air from within it. Maintaining a vacuum in the vacuum chamber 410 further reduces the heat transfer coefficient and prevents heat loss. A high-temperature resistant material layer 500, made of high-temperature resistant ceramic material, is attached to the lower side of the vacuum shell 400. The high-temperature resistant material layer 500 is in direct contact with the internal space of the kiln 100. Insulating fiber 600 is filled between the high-temperature resistant material layer 500 and the vacuum shell 400, providing insulation. The insulating fiber 600 is made of aluminosilicate fiber blanket. The high-temperature resistant material layer 500 is in direct contact with the flames and hot airflow within the kiln 100, protecting the insulating fiber 600 and extending its service life.

[0023] Reference Figures 1 to 4 As shown, it can be understood that multiple support blocks 411 are provided inside the vacuum chamber 410. Since the vacuum shell 400 needs to withstand external atmospheric pressure, multiple support blocks 411 are provided in the vacuum chamber 410 to support the vacuum shell 400 and prevent it from being deformed by atmospheric pressure. This allows the vacuum shell 400 to be manufactured using thinner steel plates, reducing weight and manufacturing costs. The support blocks 411 are made of alumina ceramic or aerogel with low thermal conductivity to prevent heat from being transferred from the lower side of the support blocks 411 to the upper side.

[0024] Reference Figures 1 to 4As shown, the high-temperature resistant material layer 500 includes multiple high-temperature resistant ceramic blocks 510 and multiple hooks 520. One end of each hook 520 is embedded within a high-temperature resistant ceramic block 510. This embedding reduces the hook's temperature during use and prevents deformation and failure; therefore, the hook 520 can be made of high-temperature resistant alloy steel. The hook 520 is connected to the upper end of the high-temperature resistant ceramic block 510. For ease of manufacturing and disassembly, one end of the hook 520 passes through the high-temperature resistant ceramic block 510 and is connected to a nut. The nut and the high-temperature resistant ceramic block 510 abut against each other to prevent the hook 520 from detaching. This connection method requires high-quality materials for the hook 520 and the nut, and the temperature inside the kiln 100 cannot be too high. Multiple hanging rings 401 are welded to the lower side of the vacuum shell 400, and the hooks 520 are hung on the corresponding hanging rings 401. The number of hanging rings 401 is equal to the number of hooks 520. Since the high-temperature resistant material layer 500 is in direct contact with the flames and flue gas inside the furnace when the kiln 100 is working, it wears out quickly and needs to be replaced. The high-temperature resistant ceramic blocks 510 are hung on the lower side of the vacuum shell 400 by hooks 520, which can be easily replaced when damaged. Moreover, the high-temperature resistant material layer 500 is composed of multiple high-temperature resistant ceramic blocks 510, so only some of the damaged high-temperature resistant ceramic blocks 510 can be replaced, improving the economy of maintenance.

[0025] Reference Figures 1 to 4 As shown, it can be understood that the high-temperature resistant ceramic block 510 has a groove 511 on its side and a boss 512 integrally formed on its side. The boss 512 on the high-temperature resistant ceramic block 510 is embedded in the groove 511 on the connected high-temperature resistant ceramic block 510. Through the cooperation of the groove 511 and the boss 512, adjacent high-temperature resistant ceramic blocks 510 are connected, which improves the mechanical strength of the high-temperature resistant material layer 500 composed of multiple high-temperature resistant ceramic blocks 510, and also prevents the heat insulation fiber 600 from falling into the kiln 100.

[0026] Reference Figures 1 to 4As shown, it can be understood that multiple cooling channels 310 are provided within the metal reflective layer 300. These cooling channels 310 can be directly cast or formed by welding steel pipes to the upper end of the metal reflective layer 300. A water pump 320 is connected to each cooling channel 310, which injects cold water into the channel to absorb heat from the metal reflective layer 300. After absorbing heat and becoming hot water in the cooling channel 310, the water can be transported to processes requiring hot water, or cooled and recycled using cooling equipment such as a cooling tower. Since there are no heat-insulating components above the metal reflective layer 300, heat from the metal reflective layer 300 is directly transferred to the protective support structure 200. If the temperature of the protective support structure 200 becomes too high, it will affect its mechanical strength, and debris falling onto the protective support structure 200 can easily ignite it.

[0027] Reference Figures 1 to 4 As shown, the protective support structure 200 is bolted to the metal reflective layer 300. The metal reflective layer 300 has threaded holes for screws to connect to it. The screws pass through the protective support structure 200 and are threaded into the threaded holes. It is foreseeable that multiple nuts could be welded to the upper end of the metal reflective layer 300 for screw connection. The bolted connection between the protective support structure 200 and the metal reflective layer 300 allows the metal reflective layer 300 and the vacuum housing 400 to be prefabricated together and installed below the protective support structure 200.

[0028] Reference Figures 1 to 4 As shown, it can be understood that the metal reflective layer 300 and the vacuum housing 400 are welded together via a bracket 700. Both the metal reflective layer 300 and the vacuum housing 400 are made of metal; for ease of manufacturing and assembly / disassembly, the metal reflective layer 300 and the vacuum housing 400 can be directly welded together. The bracket 700 is used to separate the metal reflective layer 300 from the vacuum housing 400, reducing heat transfer between them via thermal conduction.

[0029] Reference Figures 1 to 4As shown, the vacuum holding device 420 includes a vacuum pump 421 and a valve 422. The vacuum pump 421 is connected to the vacuum chamber 410 via a pipe 423. After the vacuum pump 421 starts, it extracts air from the vacuum chamber 410 through the pipe 423, creating a vacuum within the vacuum chamber 410 to reduce the heat transfer coefficient of the vacuum housing 400. The valve 422 is connected to the pipe 423. After a vacuum is created in the vacuum chamber 410, the valve 422 closes after the vacuum pump 421 stops to maintain the vacuum level within the vacuum chamber 410. After the vacuum pump 421 evacuates the vacuum chamber 410 to a vacuum level, the valve 422 is closed. Once the valve 422 is closed, the vacuum chamber 410 is isolated from the outside environment to maintain the vacuum, thus eliminating the need to continuously start the vacuum pump 421 to maintain the vacuum within the vacuum chamber 410, which helps reduce energy consumption.

[0030] Reference Figures 1 to 4 As shown, the vacuum holding device 420 also includes a vacuum sensor 424, which is located inside the vacuum chamber 410 to monitor the vacuum level within the chamber. Because the pipe 423 and the vacuum housing 400 cannot maintain a complete seal, air will gradually enter the vacuum chamber 410 after the valve 422 is closed, causing the insulation effect of the vacuum chamber 410 to gradually decrease. When the vacuum sensor 424 detects that the vacuum level inside the vacuum chamber 410 has dropped below 50 kPa, the vacuum pump 421 needs to be started and the valve 422 opened to re-evacuate the vacuum chamber 410 to a vacuum.

[0031] Reference Figures 1 to 4 As shown, the protective support structure 200 is composed of structural steel and high-temperature resistant ceramic plates. The structural steel provides the main mechanical strength for the protective support structure 200, supporting components such as the metal reflective layer 300 and the vacuum shell 400 located beneath it. The high-temperature resistant ceramic plates primarily serve to provide mechanical protection for the metal reflective layer 300.

[0032] Working principle: When in use, start the vacuum pump 421 and open the valve 422. The vacuum pump 421 extracts the air from the vacuum chamber 410 through the pipe 423. After the vacuum sensor 424 detects that the vacuum chamber 410 has reached a vacuum, it closes the valve 422 and then turns off the vacuum pump 421. The vacuum shell 400 and the heat insulation fiber 600 reduce heat transfer and effectively prevent heat loss in the kiln 100. The metal reflective layer 300 reflects the heat transferred by thermal radiation back to the vacuum shell 400, and the water in the cooling channel 310 inside the metal reflective layer 300 carries away the heat of the metal reflective layer 300, preventing heat transfer to the protective support structure 200 so that the protective support structure 200 can maintain a normal temperature.

[0033] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A multi-layer composite kiln roof structure for sealing the top of a kiln (100), characterized in that, include: The protective support structure (200) is connected to the fixed support surface of the kiln (100) and plays a supporting role. A metal reflective layer (300) has a high reflectivity coating on its lower surface and is connected to the lower side of the protective support structure (200). A vacuum housing (400) is connected to the metal reflective layer (300). A vacuum chamber (410) is provided inside the vacuum housing (400). A vacuum holding device (420) for extracting air from the vacuum chamber (410) is connected to the vacuum chamber (410). A high-temperature resistant material layer (500), made of high-temperature resistant ceramic material, is connected to the lower side of the vacuum shell (400); Insulating fiber (600) is filled between the high-temperature resistant material layer (500) and the vacuum shell (400) to provide insulation.

2. The multi-layer composite kiln roof structure according to claim 1, characterized in that: The vacuum chamber (410) is provided with multiple support blocks (411).

3. The multi-layer composite kiln roof structure according to claim 2, characterized in that: The high-temperature resistant material layer (500) includes multiple high-temperature resistant ceramic blocks (510) and multiple hooks (520). The hooks (520) are connected to the upper end of the high-temperature resistant ceramic blocks (510). Multiple hanging rings (401) are connected to the lower side of the vacuum shell (400). The hooks (520) are hung on the corresponding hanging rings (401).

4. The multi-layer composite kiln roof structure according to claim 3, characterized in that: The high-temperature resistant ceramic block (510) has a groove (511) on its side and a boss (512) on its side. The boss (512) on the high-temperature resistant ceramic block (510) is embedded in the groove (511) on the connected high-temperature resistant ceramic block (510).

5. The multi-layer composite kiln roof structure according to claim 4, characterized in that: The metal reflective layer (300) is provided with a plurality of cooling channels (310), and the cooling channels (310) are connected to a water pump (320). The water pump (320) is used to inject cold water into the cooling channels (310) to absorb the heat of the metal reflective layer (300).

6. The multi-layer composite kiln roof structure according to claim 5, characterized in that: The protective support structure (200) is bolted to the metal reflective layer (300).

7. The multi-layer composite kiln roof structure according to claim 6, characterized in that: The metal reflective layer (300) and the vacuum housing (400) are welded together via a bracket (700).

8. The multi-layer composite kiln roof structure according to claim 7, characterized in that: The vacuum holding device (420) includes a vacuum pump (421) and a valve (422). The vacuum pump (421) is connected to the vacuum chamber (410) through a pipe (423). The vacuum pump (421) is used to extract air from the vacuum chamber (410). The valve (422) is connected to the pipe (423). After the vacuum pump (421) stops, the valve (422) closes to maintain the vacuum level in the vacuum chamber (410).

9. A multi-layer composite kiln roof structure according to claim 8, characterized in that: The vacuum holding device (420) further includes a vacuum sensor (424), which is disposed in the vacuum chamber (410) to monitor the vacuum level in the vacuum chamber (410).

10. A multi-layer composite kiln roof structure according to claim 9, characterized in that: The protective support structure (200) is composed of steel profiles and high-temperature resistant ceramic plates.

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