Column foot and graphite sagger

Abstract

The utility model relates to the technical field of graphite saggars, in particular to a column foot and a graphite saggar, which comprise a first right-angle side and a second right-angle side which can be connected with each other to form an inner right-angle included angle, and the first right-angle side and the second right-angle side are respectively provided with a first side plate connecting part and a second side plate connecting part; a limiting clamping part is arranged on the top of the inner wall of the inner right-angle included angle and can communicate with the top of the first side plate connecting part and the top of the second side plate connecting part. The column foot is simple in structure, connection between adjacent side plates is facilitated, and stacking connection of the cover plate or the bottom plate boss can be further facilitated by arranging the limiting clamping part at the top.

Description

Technical Field

[0001] This utility model relates to the field of graphite sagger technology, and in particular to a column base and a graphite sagger. Background Technology

[0002] Graphite saggers are high-temperature resistant containers made primarily from high-purity artificial graphite. The raw materials are prepared through processes such as mixing, molding, isostatic pressing, calcination, impregnation, and graphitization, followed by machining. They can withstand extreme temperatures exceeding 2000℃, rapidly and evenly transferring heat to prevent localized overheating; they also resist corrosion from acids, alkalis, and molten metals. Therefore, they are widely used in the field of new energy lithium battery materials. For example, in lithium battery production, graphite saggers primarily serve as high-temperature resistant, high-thermal-conductivity sintering containers to support positive / negative electrode materials and ensure their structural stability and chemical purity during high-temperature processing, thereby improving battery capacity, cycle life, and safety.

[0003] There are two traditional methods for preparing graphite saggers. One is the mechanical excavation process, which uses artificial graphite blocks as raw materials and employs excavation and milling. This process suffers from extremely low raw material utilization (<20%), generates a large amount of waste, and has high recycling costs. Furthermore, the supply of artificial graphite blocks is limited, and the processing cycle is long, leading to a severe shortage of production capacity. The machining process also generates a large amount of dust particles, resulting in extremely high environmental remediation costs. The other method is compression molding and curing. This process relies on high-pressure molds and heating equipment, resulting in high initial equipment investment and a low yield rate of only 50%-60%. In addition, due to the difference in thermal expansion coefficients between graphite powder and petroleum coke, the density varies in different areas under compression. After molding, the material experiences concentrated thermal stress, resulting in a 30%-50% decrease in flexural strength and a porosity >20%. This leads to high brittleness, poor thermal shock stability, and a service life less than 1 / 5 of that achieved with the traditional process.

[0004] In view of the above-mentioned defects, Chinese invention patent CN114508943B discloses a combined graphite sagger and its forming method. This combined graphite sagger includes a base plate, multiple side plates, multiple graphite square pillars, and carbon fiber screws. The side plates are vertically arranged on the base plate around its perimeter, forming a box structure with cavities. The graphite square pillars are respectively arranged along the seams between the side plates and the base plate, and between the side plates themselves. Connecting holes are formed on the graphite square pillars, the base plate, and the side plates. The base plate, side plates, and graphite square pillars are fixed by the carbon fiber screws engaging with the connecting holes. The surface of the carbon fiber screws is covered with a carbonized layer, or the space between the carbon fiber screws and the inner wall of the connecting holes is filled with a carbonized layer or carbonized particles. The patent states that this solution solves the problems of high cost, complex processing, stress concentration, and mechanical defects in existing graphite saggers.

[0005] The publicly available solution uses a snap-fit ​​connection between the side plates, but the graphite material may deform due to thermal expansion at high temperatures, causing misalignment of the snap-fit. This can lead to material leakage at the joint, affecting the sintering quality of the cathode material, and making it difficult to repeatedly disassemble and reassemble the snap-fit ​​after deformation, thus reducing the reuse rate of the crucible.

[0006] Therefore, a new technical solution is urgently needed to solve the above-mentioned technical problems. Utility Model Content

[0007] The purpose of this utility model is to overcome the problems of the prior art and provide a column foot to solve the technical problems of existing spliced ​​graphite sagger side plates being connected by a male and female interlocking joint. Under high temperature, the graphite material may deform due to thermal expansion, resulting in misalignment of the interlocking joint. This leads to material leakage at the joint, affecting the sintering quality of the positive electrode material, and the saggering joint is difficult to disassemble and reassemble after deformation, reducing the reuse rate of the sagger.

[0008] The above objectives are achieved through the following technical solutions:

[0009] A column base and graphite sagger include a first right-angled side and a second right-angled side that can be connected to each other to form an inner right-angled angle. A first side plate connecting part and a second side plate connecting part are respectively provided on the first right-angled side and the second right-angled side. A limiting clamping part is provided at the top of the inner wall of the inner right-angled angle, and the limiting clamping part can communicate with the top of the first side plate connecting part and the second side plate connecting part.

[0010] Furthermore, the column base is made of graphite or carbon fiber and composite materials.

[0011] Furthermore, the first side plate connecting part and the second side plate connecting part have the same specifications, both being right-angled grooves on the first right-angled side and the second right-angled side, and the bottom wall of the right-angled groove of the side plate serves as the side plate connecting position.

[0012] Furthermore, several carbon fiber screw holes that can penetrate the first right-angled side and the second right-angled side are opened on the side plate connection position.

[0013] Furthermore, the limiting clamping part includes a clamping part bottom wall that can support the cover plate or the bottom plate boss, and a limiting side wall that can limit the corners of the cover plate or the bottom plate boss.

[0014] Furthermore, the shape of the limiting sidewall is the same as the corner shape of the cover plate or the bottom plate boss.

[0015] Furthermore, the outer sides of the bottom of the first right-angled side and the second right-angled side are provided with outwardly protruding right-angled corners.

[0016] Furthermore, the right-angled corner bracket is integrally formed with the column base.

[0017] Furthermore, it includes four column bases, with adjacent column bases connected by side plates to form a rectangular frame. The bottom of the rectangular frame is connected to the base plate to form the graphite sagger with an open top.

[0018] Furthermore, the bottom of the base plate is provided with a downwardly protruding base plate boss.

[0019] The column base provided by this utility model not only has a simple structure and facilitates the connection between adjacent side plates, but also, by setting a limiting clamping part at the top, further facilitates the stacking and connection of the cover plate or bottom plate boss. The graphite sagger based on this column base not only has a simple structure, fewer core components, and uniform specifications—for example, a graphite sagger using column bases and side plates of the same specifications—it can greatly improve the production efficiency of this device. Furthermore, it is easy to assemble, has high robustness, and can be directly replaced in case of component damage, effectively reducing maintenance costs. Attached Figure Description

[0020] Figure 1 This is a first-view structural diagram of a column base according to the present invention;

[0021] Figure 2 This is a schematic diagram of the second-view structure of a column base according to the present invention;

[0022] Figure 3 This is a third-view structural diagram of a column base according to the present invention;

[0023] Figure 4 This is a first-view structural schematic diagram of a graphite sagger according to the present invention;

[0024] Figure 5 This is a second-view structural schematic diagram of a graphite sagger according to the present invention.

[0025] Illustration markings:

[0026] 1-Column base, 101-Inner right angle, 102-First right angle side, 103-Second right angle side, 104-Limiting clamping part, 105-Side plate right angle groove, 106-Right angle wrapping corner, 107-Bottom wall of clamping part, 108-Limiting side wall, 109-Side plate connecting part, 110-First side plate connecting part, 111-Second side plate connecting part;

[0027] 2-Graphite sagger;

[0028] 3-Rectangular frame;

[0029] 4-Side panels;

[0030] 5-Base plate;

[0031] 6- Bottom plate boss;

[0032] 7-Carbon fiber screw holes;

[0033] 8-Carbon fiber screws. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. The described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0035] like Figures 1-3 As shown, this solution provides a column base, including a first right-angled side 102 and a second right-angled side 103 that can be connected to form an inner right-angled angle 101. The first right-angled side 102 and the second right-angled side 103 are respectively provided with a first side plate connecting part 110 and a second side plate connecting part 111 for facilitating the connection of the side plates 4. A limiting clamping part 104 is provided at the top of the inner wall of the inner right-angled angle 101, and the limiting clamping part 104 can communicate with the top of the first side plate connecting part 110 and the second side plate connecting part 111.

[0036] In this embodiment, the column base 1 is an assembly component of a spliced ​​graphite sagger. The first right-angled side 102 and the second right-angled side 103 are respectively used to connect the side plates 4 on both sides of the column base 1, thereby serving as a connection medium between the two side plates 4.

[0037] The limiting clamping part 104 located at the top of the column foot 1 is used to limit and clamp the cover plate of the graphite sagger 2 or the bottom plate boss 6 of the vertically stacked graphite saggers.

[0038] It should be noted that the column base 1 in this embodiment is an integrally formed structure, that is, the first right-angled side 102 and the second right-angled side 103, as well as the first side plate connecting part 110, the second side plate connecting part 111 and the limiting clamping part 104 are integrally formed.

[0039] In this embodiment, the column base 1 is made of graphite material or carbon fiber and composite materials.

[0040] The graphite materials include: isostatic high-purity graphite, high-purity graphite, and medium-coarse graphite.

[0041] The carbon fiber and composite materials include: carbon fiber, carbon-carbon composite materials, etc.

[0042] It should be noted that the first side plate connecting part 110 and the second side plate connecting part 111 have the same specifications. Both are side plate right angle grooves 105 formed on the first right angle side 102 and the second right angle side 103. The bottom wall of the side plate right angle groove 105 serves as the side plate connecting position 109, and the side wall of the side plate right angle groove 105 is used to contact the end of the side plate 4 to limit the end of the side plate 4.

[0043] In addition, the side plate connection position 109 has several carbon fiber screw holes 7 that can pass through the first right-angled side 102 and the second right-angled side 103, so as to screw the carbon fiber screws 8.

[0044] This structure enables a secure connection between the side plate 4 and the side plate connection position 109.

[0045] like Figure 1 and Figure 2 As shown, the limiting clamping part 104 in this embodiment includes a clamping part bottom wall 107 that can support the cover plate or the bottom plate boss 6, and a limiting side wall 108 that can limit the corners of the cover plate or the bottom plate boss 6.

[0046] The shape of the limiting sidewall 108 is the same as the corner shape of the cover plate or the bottom plate boss 6, and can be right angle, arc, etc.

[0047] like Figures 1-3 As shown, as an optimization of this embodiment, the outer sides of the bottom of the first right-angled side 102 and the second right-angled side 103 are also provided with outwardly protruding right-angled corners 106. By providing right-angled corners 106 on the outer periphery of the bottom of the column base 1, the bottom area of ​​the column base 1 can be increased, thereby increasing the connection area between it and the base plate, forming a more stable connection. Under this structure, if multiple graphite saggers 2 are stacked longitudinally, the graphite saggers located below, especially the bottommost ones, will not be damaged due to the pressure superimposed above, such as the disintegration of the side plates caused by heavy pressure. On the other hand, it can also limit the adjacent stacked graphite saggers, ensuring that there is a certain gap between adjacent graphite saggers, such as the lateral distance between each stack layer. This is beneficial for the gripping of the robot during placement and for the stability of the temperature around the graphite saggers during operation, thereby achieving uniform heating of the material inside the graphite saggers.

[0048] As a further optimization of this embodiment, the right-angle corner 106 is integrally formed with the column base 1, which is not only easy to process, but also avoids falling off due to thermal stress or mechanical impact.

[0049] like Figure 4 and Figure 5As shown, this solution also provides a graphite sagger based on the above-mentioned column base 1, including 4 of the column bases 1. Adjacent column bases 1 are connected by side plates 4 to form a rectangular frame 3. The bottom of the rectangular frame 3 is connected to the bottom plate 5 to form the graphite sagger 2 with a top opening.

[0050] like Figure 5 As shown, the bottom of the base plate 5 is provided with a downward protruding base plate boss 6 so as to realize the longitudinal stacking of two adjacent graphite saggers 2.

[0051] The above description is only for illustrating the embodiments of this utility model and is not intended to limit this utility model. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A column base, characterized in that, It includes a first right-angled side (102) and a second right-angled side (103) that can be connected to form an inner right-angled angle (101). The first right-angled side (102) and the second right-angled side (103) are respectively provided with a first side plate connecting part (110) and a second side plate connecting part (111). A limiting clamping part (104) is provided at the top of the inner wall of the inner right-angled angle (101). The limiting clamping part (104) can communicate with the top of the first side plate connecting part (110) and the second side plate connecting part (111).

2. A column base according to claim 1, characterized in that, The first side plate connecting part (110) and the second side plate connecting part (111) have the same specifications. They are both side plate right angle grooves (105) opened on the first right angle side (102) and the second right angle side (103), and the bottom wall of the side plate right angle groove (105) serves as the side plate connecting position (109).

3. A column base according to claim 2, characterized in that, The side plate connection position (109) has several carbon fiber screw holes (7) that can pass through the first right-angled side (102) and the second right-angled side (103).

4. A column base according to claim 1, characterized in that, The limiting clamping part (104) includes a clamping part bottom wall (107) that can support the cover plate or the bottom plate boss (6) and a limiting side wall (108) that can limit the corners of the cover plate or the bottom plate boss (6).

5. A column base according to claim 4, characterized in that, The shape of the limiting sidewall (108) is the same as the corner shape of the cover plate or the bottom plate boss (6).

6. A column base according to claim 1, characterized in that, The outer sides of the bottom of the first right-angled side (102) and the second right-angled side (103) are also provided with outwardly protruding right-angled corners (106).

7. A column base according to claim 6, characterized in that, The right-angle corner (106) is integrally formed with the column base (1).

8. A graphite sagger, characterized in that, The graphite sagger (2) includes four column feet (1) as described in any one of claims 1-7, and adjacent column feet (1) are connected by side plates (4) to form a rectangular frame (3). The bottom of the rectangular frame (3) is connected to the bottom plate (5) to form the graphite sagger (2) with an open top.

9. An inkstone saggar according to claim 8, characterized in that, The bottom of the base plate (5) is provided with a downward protruding base plate boss (6).

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