High-temperature sintering furnace for preventing deformation of heat screen

Abstract

The high-temperature sintering furnace capable of preventing the deformation of the heat insulation screen comprises a side heat insulation screen, an anti-deformation heat insulation screen and a lower heat insulation screen, the side heat insulation screen is annular, the anti-deformation heat insulation screen is connected with the side heat insulation screen in a sleeved mode, the anti-deformation heat insulation screen is disc-shaped, and the anti-deformation heat insulation screen is connected with the lower heat insulation screen in a sleeved mode. The anti-deformation heat insulation screen comprises a connecting bottom plate, an outer heat insulation layer and an inner heat insulation layer, the outer diameter of the connecting bottom plate is larger than that of the side heat insulation screen, the upper end of the connecting bottom plate is connected with the outer heat insulation layer, the outer diameter of the outer heat insulation layer is the same as that of the side heat insulation screen, and the upper end of the outer heat insulation layer is connected with the inner heat insulation layer. The outer diameter of the inner heat insulation layer is smaller than the inner diameter of the side heat insulation screen, and the connecting bottom plate, the outer heat insulation layer and the inner heat insulation layer are fixed through bolts. Compared with the prior art, the high-temperature sintering furnace capable of preventing the deformation of the heat insulation screen can effectively prevent the side heat insulation screen from extruding the lower heat insulation screen to cause serious deformation of the lower heat insulation screen through the arrangement of the anti-deformation heat insulation screen.

Description

Technical Field

[0001] The utility model relates to the technical field of sintering furnaces, in particular to a high-temperature sintering furnace capable of preventing a heat insulation screen from being deformed. Background Art

[0002] High-temperature sintering furnaces are assembled from side, upper, and lower heat shields. The lower shield is adjustable in height. During the atmosphere and high-temperature sintering process, the side shields contract radially, squeezing the lower shield, causing it to deform and warp. To avoid this, a large gap is typically left between the side and lower shields. However, this results in poor thermal uniformity and severe sparking, leading to high maintenance costs. Summary of the Invention

[0003] In view of this, it is necessary to provide a high-temperature sintering furnace that prevents deformation of the heat shield. By improving the structure of the sintering furnace, deformation of the heat shield, especially deformation of the lower heat shield, can be prevented.

[0004] A high-temperature sintering furnace for preventing deformation of a heat insulation screen comprises a side heat insulation screen, an anti-deformation heat insulation screen, and a lower heat insulation screen. The side heat insulation screen is annular, and the anti-deformation heat insulation screen is sleeved and connected to the side heat insulation screen. The anti-deformation heat insulation screen is disc-shaped, and the anti-deformation heat insulation screen is sleeved and connected to the lower heat insulation screen. The anti-deformation heat insulation screen comprises a connecting bottom plate, an outer heat insulation layer, and an inner heat insulation layer. The outer diameter of the connecting bottom plate is greater than the outer diameter of the side heat insulation screen. The upper end of the connecting bottom plate is connected to the outer heat insulation layer. The outer diameter of the outer heat insulation layer is the same as the outer diameter of the side heat insulation screen. The upper end of the outer heat insulation layer is connected to the inner heat insulation layer. The outer diameter of the inner heat insulation layer is smaller than the inner diameter of the side heat insulation screen. The connecting bottom plate, the outer heat insulation layer, and the inner heat insulation layer are fixed by bolts.

[0005] Preferably, the lower heat insulation screen includes a lifting bracket, a bottom lining plate, a lower heat insulation layer, and an upper heat insulation layer. The upper end of the lifting bracket is connected to the lower surface of the bottom lining plate. The diameter of the bottom lining plate is larger than the outer diameter of the side heat insulation screen. The upper surface of the bottom lining plate is connected to the lower heat insulation layer. The diameter of the lower heat insulation layer matches the inner diameter of the outer heat insulation layer. The diameter of the upper heat insulation layer matches the inner diameter of the inner heat insulation layer. The bottom lining plate, the lower heat insulation layer, and the upper heat insulation layer are fixedly connected by bolts.

[0006] Preferably, the outer insulation layer includes a plurality of insulation boards and partitions arranged at intervals, and two adjacent insulation boards are separated by partitions.

[0007] Preferably, the heat insulation plate is a graphite plate.

[0008] Beneficial Effects: Compared to existing technologies, the high-temperature sintering furnace of the present invention, which prevents deformation of heat shields, effectively prevents the side heat shields from squeezing the lower heat shield, which could cause severe deformation of the lower heat shield, by providing anti-deformation heat shields. Because the side heat shields can be prevented from squeezing the lower heat shield, there is no need to oversize the gaps between the heat shields at the beginning of the design, effectively reducing heat field ignition and ensuring temperature uniformity. When deformation of the lower heat shield is suppressed, its service life is correspondingly extended, effectively reducing subsequent maintenance and lowering maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic structural diagram of a high-temperature sintering furnace for preventing deformation of a heat shield according to the present invention.

[0010] Figure 2 This is a schematic diagram of the internal structure of the anti-deformation heat insulation screen of the present invention.

[0011] Figure 3 It is a schematic diagram of the three-dimensional structure of the anti-deformation heat insulation screen of the present invention.

[0012] Figure 4 This is a schematic structural diagram of the lower heat insulation screen of the present utility model.

[0013] In the figure: a high-temperature sintering furnace 10 for preventing deformation of the heat insulation screen, a side heat insulation screen 20, an anti-deformation heat insulation screen 30, a connecting bottom plate 301, an outer heat insulation layer 302, an inner heat insulation layer 303, a lower heat insulation screen 40, a lifting bracket 401, a bottom lining plate 402, a lower heat insulation layer 403, and an upper heat insulation layer 404. DETAILED DESCRIPTION

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, a brief introduction will be given below to the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Please see Figures 1 to 4A high-temperature sintering furnace 10 for preventing deformation of a heat shield comprises a side heat shield 20, an anti-deformation heat shield 30, and a lower heat shield 40. The side heat shield 20 is annular, and the anti-deformation heat shield 30 is sleeved and connected to the side heat shield 20. The anti-deformation heat shield 30 is disc-shaped, and the anti-deformation heat shield 30 is sleeved and connected to the lower heat shield 40. The anti-deformation heat shield 30 comprises a connecting bottom plate 301, an outer heat insulation layer 302, and an inner heat insulation layer 303. The outer diameter of the connecting bottom plate 301 is larger than the outer diameter of the side heat insulation screen 20. The upper end of the connecting bottom plate 301 is connected to the outer heat insulation layer 302. The outer diameter of the outer heat insulation layer 302 is the same as the outer diameter of the side heat insulation screen 20. The upper end of the outer heat insulation layer 302 is connected to the inner heat insulation layer 303. The outer diameter of the inner heat insulation layer 303 is smaller than the inner diameter of the side heat insulation screen 20. The connecting bottom plate 301, the outer heat insulation layer 302, and the inner heat insulation layer 303 are fixed by bolts.

[0016] A nested structure is formed between the anti-deformation heat insulation screen 30 and the side heat insulation screen 20 , and a nested structure is formed between the anti-deformation heat insulation screen 30 and the lower heat insulation screen 40 , which can achieve a good heat insulation effect.

[0017] At the same time, when temperature fluctuations within the furnace cause the side heat shields 20 to shrink and deform, the anti-deformation heat shield 30 is primarily affected. The flat structure of the anti-deformation heat shield 30 effectively withstands horizontal compression from the side heat shields 20 without transmitting the compression to the lower heat shield 40, thereby preventing compression, warping, and fracture of the lower heat shield 40. When the anti-deformation heat shield 30 itself deforms due to temperature, it only deforms significantly vertically, with little horizontal deformation. This effectively maintains the original shape of the lower heat shield 40. Furthermore, due to the protective function of the anti-deformation heat shield 30, there is no need to reserve large gaps between the side heat shields 20 and the anti-deformation heat shield 30, or between the anti-deformation heat shield 30 and the lower heat shield 40 to offset the gap reduction caused by the shrinkage of the side heat shield 20. This improves the thermal insulation performance of the heat field and effectively prevents heat leakage and the resulting uneven temperature. At the same time, the protective effect of the anti-deformation heat insulation screen 30 enables the lower heat insulation screen 40 to remain in good condition after long-term use, thereby extending the service life of the lower heat insulation screen 40 and reducing subsequent maintenance costs.

[0018] In a preferred embodiment, the lower heat insulation screen 40 includes a lifting bracket 401, a bottom lining plate 402, a lower heat insulation layer 403, and an upper heat insulation layer 404. The upper end of the lifting bracket 401 is connected to the lower surface of the bottom lining plate 402. The diameter of the bottom lining plate 402 is larger than the outer diameter of the side heat insulation screen 20. The upper surface of the bottom lining plate 402 is connected to the lower heat insulation layer 403. The diameter of the lower heat insulation layer 403 matches the inner diameter of the outer heat insulation layer 302. The diameter of the upper heat insulation layer 404 matches the inner diameter of the inner heat insulation layer 303. The bottom lining plate 402, the lower heat insulation layer 403, and the upper heat insulation layer 404 are fixedly connected by bolts.

[0019] In this way, the upper insulation layer 404 of the lower insulation screen 40 and the inner insulation layer 303 of the anti-deformation insulation screen 30 form a relatively closed surface, and the gap therebetween is a broken line curve. Such a design can effectively reduce heat loss.

[0020] The side heat shields 20, the anti-deformation heat shield 30, and the lower heat shield 40 all have essentially the same layered structure. Taking the outer insulation layer 302 of the anti-deformation heat shield 30 as an example, this layer comprises several spaced-apart insulation panels and partitions, with adjacent insulation panels separated by partitions. Of course, the partitions can also be replaced with nuts and washers. The benefit of this spacing is that the gaps between the insulation panels provide excellent insulation.

[0021] There are many materials for the heat shield, such as graphite, tungsten heat shield, etc. The material selected varies depending on the actual application scenario. In a preferred embodiment, the heat shield is a graphite board.

[0022] The above disclosure is only a preferred embodiment of the present invention, and it is certainly not intended to limit the scope of the rights of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A high-temperature sintering furnace for preventing deformation of a heat shield, characterized by: It includes side heat insulation screens, anti-deformation heat insulation screens, and lower heat insulation screens. The side heat insulation screens are annular, and the anti-deformation heat insulation screens are connected to the side heat insulation screens in a sleeve. The anti-deformation heat insulation screens are disc-shaped, and the anti-deformation heat insulation screens are connected to the lower heat insulation screens in a sleeve. The anti-deformation heat insulation screens include a connecting bottom plate, an outer heat insulation layer, and an inner heat insulation layer. The outer diameter of the connecting bottom plate is larger than the outer diameter of the side heat insulation screens. The upper end of the connecting bottom plate is connected to the outer heat insulation layer. The outer diameter of the outer heat insulation layer is the same as the outer diameter of the side heat insulation screens. The upper end of the outer heat insulation layer is connected to the inner heat insulation layer. The outer diameter of the inner heat insulation layer is smaller than the inner diameter of the side heat insulation screens. The connecting bottom plate, the outer heat insulation layer, and the inner heat insulation layer are fixed by bolts.

2. The high-temperature sintering furnace for preventing deformation of the heat shield according to claim 1, characterized in that: The lower heat insulation screen includes a lifting bracket, a bottom lining plate, a lower heat insulation layer, and an upper heat insulation layer. The upper end of the lifting bracket is connected to the lower surface of the bottom lining plate. The diameter of the bottom lining plate is larger than the outer diameter of the side heat insulation screen. The upper surface of the bottom lining plate is connected to the lower heat insulation layer. The diameter of the lower heat insulation layer matches the inner diameter of the outer heat insulation layer. The diameter of the upper heat insulation layer matches the inner diameter of the inner heat insulation layer. The bottom lining plate, the lower heat insulation layer, and the upper heat insulation layer are fixedly connected by bolts.

3. The high-temperature sintering furnace for preventing deformation of the heat shield according to claim 1, characterized in that: The outer heat insulation layer includes a plurality of heat insulation boards and partitions arranged at intervals, and two adjacent heat insulation boards are separated by partitions.

4. The high-temperature sintering furnace for preventing deformation of the heat shield according to claim 3, characterized in that: The heat insulation plate is a graphite plate.

Images