An internally reinforced multi-cavity graphite crucible

Abstract

The utility model provides a kind of internally reinforced multi-cavity graphite crucible, it belongs to graphite crucible field, it includes: crucible body, the through slot is opened on the crucible body, cover is installed on the crucible body, the heat dissipation assembly is installed on the cover, the multiple calcination cavities are opened on the crucible body, the strengthening component is installed in the through slot inner wall.The utility model is by setting multiple support frames in through slot, improve the deformation resistance of crucible body, and support frame can disperse thermal stress in crucible body, improve the high temperature and high pressure performance and heat shock resistance of crucible body, while corrugated flange reduces local overheating phenomenon by increasing surface area, to improve temperature uniformity between multi-chamber, while corrugated fluctuation design can absorb the deformation stress generated by thermal expansion, improve thermal shock resistance, and serpentine flow guide groove prolongs metal flow time, avoid molten metal vortex or splashing due to flow rate too fast.

Description

Technical Field

[0001] This utility model relates to the field of graphite crucible technology, and in particular to an internally reinforced multi-cavity graphite crucible. Background Technology

[0002] As a high-temperature and corrosion-resistant material, graphite has a small coefficient of thermal expansion during high-temperature use, and has a certain resistance to strain during rapid heating and cooling. At the same time, it has a small temperature coefficient of resistance and low thermal inertia, which allows for rapid heating and cooling.

[0003] A multi-cavity graphite crucible with internal reinforcement, application number CN202011214969.0, includes a cylindrical crucible body and a crucible lid with vent holes on its upper surface. A circular blind groove with several calcination chambers is provided on the top surface of the crucible body. At least one annular groove is formed on the inner wall of each calcination chamber, and a silicon nitride ceramic ring is formed within the annular groove. The inner surface of the silicon nitride ceramic ring is flush with the inner wall of the calcination chamber, and several vertically arranged gas guide grooves are formed on this plane. The upper part of the gas guide groove is connected to the hollow interlayer of the crucible lid, and the crucible lid is filled with a highly thermally conductive porous filler within this interlayer. A through groove is provided at the center of the crucible body, and a silicon nitride reinforcing seat is provided below the through groove. The graphite crucible of this invention has a compact structure and is easy to operate. It can ensure the structural stability of the multi-cavity graphite crucible during continuous calcination, reduce thermal deformation, and improve the service life of the graphite crucible. However, the multi-chamber design of the crucible body limits the thickness of the side walls, and the lack of corresponding reinforcement devices in the through groove makes it prone to cracking at high temperatures. Furthermore, the uneven distribution of thermal stress between the chambers leads to structural deformation, and the reinforced structure is prone to failure under repeated thermal shocks. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides an internally reinforced multi-cavity graphite crucible.

[0005] An embodiment of this utility model provides an internally reinforced multi-cavity graphite crucible, comprising:

[0006] The crucible body has a through groove, a cover is installed on the crucible body, a heat dissipation component is installed on the cover, multiple calcining chambers are formed on the crucible body, a reinforcing component is installed on the inner wall of the through groove, the reinforcing component includes multiple support frames installed on the through groove, a serpentine guide groove is provided on the lower inner wall of each of the multiple calcining chambers, a corrugated flange is provided on the upper inner wall of each of the multiple calcining chambers, and a composite heat insulation structure is covered on the outer layer of the crucible body.

[0007] Furthermore, the heat dissipation assembly includes a heat dissipation cavity on the cover, the inner wall of the heat dissipation cavity has multiple connecting holes, the heat dissipation cavity is filled with a highly thermally conductive porous filler, the cover has an exhaust port, and the inner wall of the heat dissipation cavity has multiple heat dissipation holes.

[0008] Furthermore, the cover has multiple grooves.

[0009] Furthermore, the composite insulation structure includes, from the inside out, a silicon carbide coating, an aerogel insulation layer, and a stainless steel outer shell disposed on the side wall of the crucible body.

[0010] Furthermore, the surface of the serpentine guide channel is coated with a boron nitride wear-resistant layer.

[0011] Furthermore, the support frame is embedded with a carbon fiber reinforced core.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] By setting multiple support frames inside the through groove, the deformation resistance of the crucible body is improved, and the support frames can disperse the thermal stress inside the crucible body, thereby improving the crucible body's resistance to high temperature and high pressure, as well as its resistance to thermal shock.

[0014] The corrugated flange increases surface area, enhancing heat radiation efficiency and promoting uniform heat diffusion at the top of the chamber, reducing localized overheating and thus improving temperature uniformity across multiple chambers. Simultaneously, the corrugated design absorbs deformation stress generated by thermal expansion, mitigating the risk of crack propagation due to sudden temperature changes and improving thermal shock resistance. Furthermore, the serpentine flow channels extend the molten metal flow time, preventing eddies or splashing caused by excessive flow velocity, while also promoting impurity precipitation and improving smelting purity. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of an internally reinforced multi-cavity graphite crucible as described in an embodiment of this utility model.

[0016] Figure 2 This is a three-dimensional schematic diagram of the crucible body structure of an internally reinforced multi-cavity graphite crucible as described in an embodiment of this utility model.

[0017] Figure 3 This is a three-dimensional cross-sectional view of an internally reinforced multi-cavity graphite crucible as described in an embodiment of this utility model.

[0018] Figure 4 This is a three-dimensional sectional view of the lid structure of an internally reinforced multi-cavity graphite crucible as described in an embodiment of this utility model.

[0019] In the above figures: 1 crucible body, 2 through groove, 3 cover, 4 calcination chamber, 5 support frame, 6 serpentine guide groove, 7 corrugated flange, 8 through hole, 9 aerogel insulation layer, 10 stainless steel shell, 11 high thermal conductivity pore filler, 12 groove, 13 silicon carbide coating. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0021] like Figures 1-4 As shown, this utility model embodiment proposes an internally reinforced multi-cavity graphite crucible, comprising:

[0022] The crucible body 1 has a through groove 2 and a cover 3 installed on it. The cover 3 has multiple grooves 12 to facilitate the user to clamp the cover 3, which improves the portability of the device. A heat dissipation component is installed on the cover 3. Multiple calcination chambers 4 are opened on the crucible body 1. A reinforcing component is installed on the inner wall of the through groove 2. The reinforcing component includes multiple support frames 5 installed on the through groove 2. The support frames 5 are embedded with carbon fiber reinforced cores, which significantly improves the tensile strength and compressive stiffness of the support frames 5.

[0023] The lower inner wall of multiple calcining chambers 4 is provided with serpentine guide grooves 6. The surface of the serpentine guide grooves 6 is coated with a boron nitride wear-resistant layer, which can effectively prevent the molten metal or high-temperature medium from thermally eroding the groove. The upper inner wall of multiple calcining chambers 4 is provided with corrugated flanges 7. The outer layer of the crucible body 1 is covered with a composite heat insulation structure.

[0024] The heat dissipation assembly includes a heat dissipation cavity on the cover 3, a plurality of connecting holes 8 on the inner wall of the heat dissipation cavity, a high thermal conductivity porous filler 11 filling the heat dissipation cavity, an exhaust port on the cover 3, and a plurality of heat dissipation holes on the inner wall of the heat dissipation cavity.

[0025] The composite insulation structure includes a silicon carbide coating 13, an aerogel insulation layer 9, and a stainless steel shell 10 arranged sequentially from the inside to the outside on the side wall of the crucible body 1. By setting the composite insulation structure, the heat loss inside the crucible body 1 can be effectively reduced.

[0026] The detailed working process of this utility model is as follows:

[0027] The dual pressure relief effect of the roasting chamber 4 and the through groove 2 improves the deformation resistance of the crucible body 1. Multiple support frames 5 are installed within the through groove 2 to further enhance the deformation resistance of the crucible body 1. The support frames 5 also disperse the thermal stress within the crucible body 1, improving its resistance to high temperatures and pressures, as well as its thermal shock resistance. Furthermore, the corrugated flange 7 within the roasting chamber 4 increases the surface area, enhancing thermal radiation efficiency and promoting uniform heat diffusion at the top of the chamber, reducing localized overheating and improving temperature balance among the multiple chambers. Simultaneously, the undulating design of the corrugated flange 7 absorbs deformation stress generated by thermal expansion, mitigating the risk of crack propagation due to sudden temperature changes and improving thermal shock resistance. Moreover, the serpentine guide groove 6 extends the flow time of the molten metal, preventing eddies or splashing caused by excessively fast flow rates, while also promoting impurity precipitation and improving smelting purity. Finally, the use of a high thermal conductivity porous filler 11 further enhances the crucible body 1's resistance to high temperatures and pressures, as well as its thermal shock resistance.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An internally reinforced multi-cavity graphite crucible, characterized by, include: The crucible body (1) has a through groove (2) and a cover (3) installed on it. A heat dissipation component is installed on the cover (3). The crucible body (1) has multiple calcining chambers (4). A reinforcing component is installed on the inner wall of the through groove (2). The reinforcing component includes multiple support frames (5) installed on the through groove (2). The lower inner wall of each of the multiple calcining chambers (4) is provided with a serpentine guide groove (6). The upper inner wall of each of the multiple calcining chambers (4) is provided with a corrugated flange (7). The outer layer of the crucible body (1) is covered with a composite heat preservation structure.

2. The internally reinforced multi-cavity graphite crucible according to claim 1, characterized in that: The heat dissipation assembly includes a heat dissipation cavity opened on the cover (3), the inner wall of the heat dissipation cavity has multiple connecting holes (8), the heat dissipation cavity is filled with a high thermal conductivity porous filler (11), the cover (3) is connected to an exhaust port, and the inner wall of the heat dissipation cavity has multiple heat dissipation holes.

3. The internally reinforced multi-cavity graphite crucible according to claim 1, characterized in that: The cover (3) has multiple grooves (12).

4. The internally reinforced multi-cavity graphite crucible according to claim 1, characterized in that: The composite insulation structure includes a silicon carbide coating (13), an aerogel insulation layer (9), and a stainless steel shell (10) arranged sequentially from the inside to the outside on the side wall of the crucible body (1).

5. The internally reinforced multi-cavity graphite crucible according to claim 1, characterized in that: The surface of the serpentine guide groove (6) is coated with a boron nitride wear-resistant layer.

6. The internally reinforced multi-cavity graphite crucible according to claim 1, characterized in that: The support frame (5) is embedded with a carbon fiber reinforced core.

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