Graphite crucible with high thermal efficiency

Abstract

The utility model relates to the technical field of graphite crucibles for negative electrode material purification, and discloses a graphite crucible with high thermal efficiency, which comprises a graphite crucible body and a crucible cover, the inner side of an opening of the graphite crucible body is provided with a thickened part extending inwards, the outer side of the graphite crucible body is provided with a spiral bulge integrally connected with the graphite crucible body, and the outer side of the graphite crucible body is provided with a spiral groove. And the side wall and the bottom surface of the graphite crucible body adopt a chamfered cambered surface structure. The strength of the graphite crucible can be effectively improved through the thickening part and the spiral protruding lines, the heating surface area of the graphite crucible body is increased through the spiral protruding lines, the heat efficiency of the graphite crucible can be effectively improved, the crucible body is high in overall structural strength and heat efficiency, and the graphite crucible has the advantages of being simple in structure, high in practicability and good in using effect.

Description

Technical Field

[0001] The utility model relates to the technical field of graphite crucibles for purifying negative electrode materials, and more specifically, to a graphite crucible with high thermal efficiency. Background Art

[0002] When purifying and producing lithium battery negative electrode materials, graphite crucibles are usually used as containers to perform high-temperature heat treatment on the negative electrode materials at over 3000 degrees Celsius. Since the negative electrode powder will expand and generate gas pressure during the heat treatment process, high requirements are placed on the thermal efficiency and strength of the crucible.

[0003] In the prior art, patent publication number CN220230037U discloses a graphite crucible with high thermal efficiency. The crucible improves thermal efficiency by adopting a curved surface for heating, combined with a honeycomb-shaped heat-conducting groove and a heat-concentrating ring assembly. However, the crucible has the following disadvantages: its curved surface tank structure is not convenient for loading and unloading negative electrode materials and cleaning accumulated materials, and the layout of the heat-conducting grooves reduces the strength of the graphite crucible body, making it prone to cracking.

[0004] In view of this, the applicant has studied the existing problems and improved the traditional graphite crucible, proposing a graphite crucible with high thermal efficiency, which is suitable for the thermal efficiency and strength requirements of the crucible in the purification production of battery negative electrode materials. Utility Model Content

[0005] The utility model provides a graphite crucible with high thermal efficiency, which not only improves the thermal efficiency of the graphite crucible, but also improves the strength of the graphite crucible and has the characteristics of simple structure and strong practicality.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A graphite crucible with high thermal efficiency includes a graphite crucible body and a crucible cover. The inner side of the opening of the graphite crucible body has a thickened portion extending inward, the outer side of the graphite crucible body is provided with a spiral protrusion integrally connected to the graphite crucible body, and the side wall and bottom surface of the graphite crucible body adopt a chamfered arc surface structure.

[0008] The bottom of the crucible cover has a boss extending into the opening of the graphite crucible body, and the side wall of the boss matches the inner edge of the opening of the graphite crucible body, so that the crucible cover is stably placed on the graphite crucible body.

[0009] Preferably, the inner side of the thickened portion adopts an "S"-shaped arc surface transition structure to transition to the top surface of the graphite crucible body.

[0010] Further preferably, the top surface of the graphite crucible body is provided with a hemispherical protrusion, and the bottom surface of the crucible cover has a hemispherical groove corresponding to the hemispherical protrusion.

[0011] In another preferred embodiment, a long groove is formed along the inner wall of the hemispherical groove, one end of the long groove extends to the bottom surface of the crucible cover, and the other end extends to the side surface of the crucible cover.

[0012] The long slot is a "Z"-shaped structure with a bending loop.

[0013] The bottom surface of the boss is provided with an inner concave surface, and the peripheral side of the inner concave surface transitions to the edge of the boss through an arc surface.

[0014] The graphite crucible of the utility model can effectively improve the strength of the graphite crucible by arranging a thickened portion extending inward at the opening of the graphite crucible body and arranging spiral raised patterns on the outer side thereof. The spiral raised patterns increase the heating surface area of ​​the graphite crucible body, which can effectively improve the thermal efficiency of the graphite crucible. In addition, the inner and outer chamfered structures of the bottom edge of the graphite crucible body and the "S"-shaped arc surface transition structure of the thickened portion cooperate with each other to improve the structural strength of the crucible body as a whole, so that the graphite crucible as a whole has both high thermal efficiency and high strength.

[0015] By providing a hemispherical protrusion on the top surface of the graphite crucible body and a corresponding hemispherical groove on the bottom surface of the crucible lid, the crucible lid and the graphite crucible body are positioned and matched. Furthermore, a long groove is provided on the inner wall of the hemispherical groove, which cooperates with the hemispherical protrusion to form a curved ventilation hole to release gases released during the heat treatment of the negative electrode material. The upward curved structure prevents the filler from entering the crucible body. The long groove adopts a "Z" structure, further improving the prevention of filler from entering the crucible body.

[0016] The utility model has the characteristics of simple structure, strong practicability and good use effect, and is worthy of being widely promoted and used. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic cross-sectional view of an embodiment of the present application;

[0018] Figure 2 for Figure 1 Schematic diagram of the structure of the middle crucible cover;

[0019] Figure 3 for Figure 1 Schematic diagram of the structure of the middle crucible cover when viewed from above;

[0020] Figure 4 for Figure 1 Schematic diagram of the external structure of the middle crucible body;

[0021] Figure 5 for Figure 1 A schematic diagram of the top view of the middle crucible body;

[0022] Figure 6 for Figure 1 Another structural schematic diagram of the middle crucible cover. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See Figure 1-5 A graphite crucible with high thermal efficiency includes a graphite crucible body 1 and a crucible cover 2. The inner side of the opening of the graphite crucible body 1 has a thickened portion 1-2 extending inward, and the inner side of the thickened portion 1-2 adopts an "S"-shaped arc transition structure to transition from the inner wall of the graphite crucible body 1 to the top surface of the graphite crucible body 1 to improve the strength of the opening of the graphite crucible body 1. The outer side of the graphite crucible body 1 is provided with a spiral protrusion 1-1 integrally connected to the graphite crucible body 1, which on the one hand improves the crack resistance of the graphite crucible body 1, and on the other hand increases the surface area of ​​the graphite crucible body 1, thereby improving its thermal efficiency. The side walls and bottom surface of the graphite crucible body 1 adopt a 50-degree chamfered arc surface transition structure, which improves the strength of the crucible and facilitates the cleaning of accumulated materials in the crucible. The bottom of the crucible cover 2 has a boss 2-1 extending into the opening of the graphite crucible body 1. The side walls of the boss 2-1 cooperate with the inner edge of the opening of the graphite crucible body 1, so that the crucible cover 2 is stably covered on the graphite crucible body 1. The bottom surface of the boss 2-1 is provided with an inner concave surface 2-2. The circumference of the inner concave surface 2-2 transitions to the edge of the boss 2-1 through an arc surface. A groove is formed in the boss 2-1 through the inner concave surface 2-2, and transitions to the edge of the boss 2-1 through the arc surface, which not only reduces the weight of the crucible cover 2 but also ensures its structural strength.

[0025] In some embodiments, preferably, the top surface of the graphite crucible body 1 is provided with a hemispherical protrusion 1-3, and the bottom surface of the crucible cover 2 has a hemispherical groove 2-3 corresponding to the hemispherical protrusion 1-3, so that the crucible cover and the graphite crucible body are positioned and matched, and a long groove 2-4 is opened along the inner wall of the hemispherical groove 2-3, one end of the long groove 2-4 extends to the bottom edge of the boss 2-1 of the crucible cover 2, and the other end extends to the side of the crucible cover 2, cooperating with the hemispherical protrusion 1-3 to form an upward curved arc-shaped air-permeable long hole, so as to release the gas released during the heat treatment of the negative electrode material and prevent the filling material from entering the crucible body 1.

[0026] In some embodiments, see Figure 6 The long grooves 2-4 adopt a "Z"-shaped structure with a bending loop, which further improves the effect of preventing the filler from entering the crucible body.

[0027] The graphite crucible of this utility model features an inwardly extending thickened portion 1-2 at the opening of the graphite crucible body 1. The thickened portion 1-2 utilizes an S-shaped arcuate transition structure. A spiral protrusion 1-1 is arranged on the outside of the graphite crucible body 1, and its bottom edge has internal and external chamfers. This overall design improves both the structural strength of the crucible body 1 and its thermal efficiency. The crucible cover 2, in conjunction with the hemispherical protrusion of the graphite crucible body 1 and its upwardly curved ventilation holes, releases gases released during heat treatment of the negative electrode material while preventing filler from entering the crucible body. This simple structure, strong practicality, and excellent performance make it worthy of widespread adoption.

[0028] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A graphite crucible with high thermal efficiency, comprising a graphite crucible body and a crucible cover, characterized in that: The inner side of the opening of the graphite crucible body has a thickened portion extending inward, the outer side of the graphite crucible body is provided with a spiral protrusion integrally connected to the graphite crucible body, and the side wall and bottom surface of the graphite crucible body adopt a chamfered arc surface structure.

2. The graphite crucible according to claim 1, characterized in that: The chamfer is 50 degrees.

3. The graphite crucible according to claim 1, characterized in that: The bottom of the crucible cover is provided with a boss extending into the opening of the graphite crucible body, and the side wall of the boss matches the inner edge of the opening of the graphite crucible body.

4. The graphite crucible according to claim 3, characterized in that: The bottom surface of the boss is provided with an inner concave surface, and the peripheral side of the inner concave surface transitions to the edge of the boss through an arc surface.

5. The graphite crucible according to claim 1, characterized in that: The inner side of the thickened portion adopts an "S"-shaped arc surface transition structure to transition to the top surface of the graphite crucible body.

6. The graphite crucible according to claim 1, characterized in that: The top surface of the graphite crucible body is provided with a hemispherical protrusion, and the bottom surface of the crucible cover is provided with a hemispherical groove corresponding to the hemispherical protrusion.

7. The graphite crucible according to claim 6, characterized in that: A long groove is opened along the inner wall of the hemispherical groove, one end of the long groove extends to the bottom surface of the crucible cover, and the other end extends to the side surface of the crucible cover.

8. The graphite crucible according to claim 7, characterized in that: The long slot is a "Z"-shaped structure with a bending loop.

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