CN216396258U

CN216396258U - Stirring shaft of horizontal coating granulation equipment for lithium battery negative electrode material

Info

Publication number: CN216396258U
Application number: CN202123139410.9U
Authority: CN
Inventors: 谢志锋; 梁子龙; 谢国卫; 冯志成
Original assignee: Foshan Shuochen Machinery Equipment Co ltd
Current assignee: Foshan Shuochen Machinery Equipment Co ltd
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2022-04-29
Anticipated expiration: 2031-12-14

Abstract

The utility model provides a stirring shaft of a horizontal coating granulation device for lithium battery negative electrode materials, which comprises a main shaft and a stirring paddle, wherein the main shaft is a hollow shaft, a shaft sleeve is sleeved on the outer side of the main shaft, and the stirring paddle is arranged on the shaft sleeve. Design into the hollow shaft with the main shaft, make it can let in circulated coolant in the use, constantly circulate and guarantee that the temperature of axle is unlikely to too high and the softening and the oxidation that produce, the peripheral hardware axle sleeve lets in the course of the work because of the preferential effect of high temperature is on the axle sleeve, replace the main shaft by the axle sleeve and produce the deformation, and guarantee that the temperature of axle does not rise to surplus, take away the interior material heat of cauldron as far as possible, the durability of the complete sets of equipment has been ensured, the development of promotion cathode material that can be better.

Description

Stirring shaft of horizontal coating granulation equipment for lithium battery negative electrode material

Technical Field

The utility model relates to the technical field of lithium battery production equipment, in particular to a stirring shaft of horizontal coating granulation equipment for a lithium battery negative electrode material.

Background

When coating and granulating, the new energy material, namely the lithium battery cathode material, needs to be heated to 650 ℃ or higher. The stirring shaft commonly used in the existing market is mostly sus304 or 310S, the ultimate use temperature of the sus304 is 800 ℃, and the ultimate use temperature of the 310S is 1150 ℃. The yield strength of both materials decreases stepwise with increasing temperature. When the temperature reaches 650 ℃, the temperature of the austenitic stainless steel is 460-800 ℃ which is the sensitization temperature, so when the temperature reaches 650 ℃, 304 is not suitable for being used as a stressed rotating shaft, and 650 ℃ is in the sensitization temperature range, oxidation begins to occur to pollute materials. Although the material of the stirring shaft can be set to 310S, the manufacturing cost is high, the process of coating and granulating the anode material at the very high temperature reaches 1200 ℃ or higher, 310S stainless steel has good high temperature resistance, and when the temperature exceeds 800 ℃, the stainless steel starts to soften, and the allowable stress starts to be continuously reduced. Because the horizontal coating granulation equipment for the lithium battery cathode material has high capacity and low requirement on the height of a workshop, the equipment is selected to be purchased by all equipment demanders the problem. The shaft structure of the horizontal coating granulation kettle for the lithium battery negative electrode material is horizontally arranged, two ends of the horizontal coating granulation kettle are fixed, a certain force for vertically downwards aligning the shaft can be generated due to the self weight of the stirring shaft, and the stirring shaft made of 304 materials can generate permanent bending deformation when the temperature reaches 650 ℃ and can generate permanent bending deformation when the temperature reaches 1200 ℃. After the bending deformation is generated, irrecoverable leakage can occur in the shaft seals at the two ends of the equipment, the time and the labor are wasted unless the stirring shaft is replaced from the new stirring shaft, the production can be interrupted for a long time, and the value of the equipment cannot be embodied. Therefore, the maintenance rate of horizontal coating granulation equipment in the existing market is high, most of the horizontal coating granulation equipment is used for less than half a year, the shaft seal leaks due to the permanent bending deformation of the shaft, and the high-temperature material leakage has certain danger and is very likely to cause scalding or fire accidents of operators. Although the alloy steel has good strength up to over 1200 ℃, the cost is too high, so the alloy steel cannot be popularized and used.

Disclosure of Invention

The utility model aims to provide a stirring shaft of a horizontal coating granulation device for a lithium battery negative electrode material, which can ensure that the temperature of the shaft is hardly increased and greatly prolong the deformation time of the stirring shaft.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

the utility model provides a lithium cell negative electrode material cladding granulation equipment (mixing) shaft, includes main shaft and stirring rake, the main shaft is the hollow shaft, the outside cover of main shaft is equipped with the axle sleeve, the stirring rake sets up on the axle sleeve.

Further, a heat insulation layer is arranged between the main shaft and the shaft sleeve.

Furthermore, two ends of the shaft sleeve are provided with fixed sealing plates.

Furthermore, the shaft sleeve is detachably sleeved on the main shaft.

Furthermore, a notch is formed in the shaft sleeve, a through hole is formed in the notch, a screw hole is formed in the main shaft, the through hole corresponds to the screw hole in position, the through hole is connected with the screw hole through a bolt, and a heat insulation material is filled in the notch.

The utility model has the beneficial effects that:

by adopting the technical scheme, the stirring shaft of the lithium battery cathode material coating granulation equipment is designed into a hollow shaft, so that a recyclable cooling medium can be introduced into the stirring shaft in the using process, the continuous recycling ensures that the temperature of the shaft is not too high to cause softening and oxidation, the shaft sleeve is arranged outside, the main shaft 1 is replaced by the shaft sleeve to generate deformation when the stirring shaft is preferentially acted on the shaft sleeve due to high temperature in the working process, the temperature of the shaft is not increased to the rest, the heat of materials in a kettle is taken away as little as possible, the durability of the whole set of equipment is ensured, and the development of the cathode material can be better promoted.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of the overall structure of a stirring shaft of the horizontal apparatus of the present invention;

FIG. 2 is a schematic structural diagram of the connection position of the stirring shaft of the horizontal equipment.

Reference numerals: 1. a main shaft; 11. a screw hole; 2. a stirring paddle; 3. a shaft sleeve; 31. fixing the sealing plate; 32. a recess; 33. a through hole; 34. a bolt; 4. an insulating layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, a stirring shaft of a lithium battery cathode material coating granulation device comprises a main shaft 1 and a stirring paddle 2, wherein the main shaft 1 is a hollow shaft, a shaft sleeve 3 is sleeved on the outer side of the main shaft 1, and the stirring paddle 2 is arranged on the shaft sleeve 3.

In this scheme, design into the hollow shaft with main shaft 1, make it can let in circulative cooling medium such as circulating water in the use, constantly circulate and destroy and ensure that the temperature of main shaft 1 is unlikely to the softening and the oxidation that too high and produce, the cover is equipped with axle sleeve 3 in the outside of main shaft 1 simultaneously, let in the course of the work because of high temperature is preferred to be acted on axle sleeve 3, replace main shaft 1 by axle sleeve 3 and produce the deformation, greatly prolong the time that main shaft 1 becomes crooked, and then avoid the axle seal at equipment both ends can appear the condition of irreparable seepage in the short time.

Preferably, a heat insulation layer 4 is arranged between the main shaft 1 and the shaft sleeve 3, and the heat insulation layer 4 can separate the main shaft 1 from the shaft sleeve 3, so that the temperature of the main shaft 1 is not increased to the maximum extent, and the heat of materials in the equipment is taken away as little as possible by the cooling medium.

More specifically, the both ends of axle sleeve 3 are provided with fixed seal plate 31 again, and fixed seal plate 31 is sealed with the space position at the both ends of axle sleeve 3, avoids the insulation material of insulating layer 4 to spill, avoids weakening thermal-insulated effect after long-time.

Specifically, the shaft sleeve 3 is detachably sleeved on the main shaft 1, and after the shaft sleeve 3 is deformed to influence the work of equipment in long-term use, the shaft sleeve 3 can be detached from the main shaft 1 and replaced by a new shaft sleeve 3.

More specifically, as shown in fig. 2, a notch 32 is formed in the shaft sleeve 3, a through hole 33 is formed in the notch 32, a screw hole 11 is formed in the main shaft 1, the through hole 33 corresponds to the screw hole 11 in position, the through hole 33 is connected with the screw hole 11 through a bolt 34, a heat insulation material is filled in the notch 32, the bolt 34, the through hole 33 and the screw hole 11 are covered by the heat insulation material, the weakest position of the fixing position is protected from being in direct contact with a high-temperature material of the equipment, the heat conduction area is also reduced, and the stability of long-time use is ensured.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a horizontal cladding granulation equipment (mixing) shaft of lithium cell negative pole material, includes main shaft (1) and stirring rake (2), its characterized in that: the main shaft (1) is a hollow shaft, a shaft sleeve (3) is sleeved on the outer side of the main shaft (1), and the stirring paddle (2) is arranged on the shaft sleeve (3).

2. The stirring shaft of the horizontal coating granulation equipment for the lithium battery negative electrode material as claimed in claim 1, is characterized in that: a heat insulation layer (4) is arranged between the main shaft (1) and the shaft sleeve (3).

3. The stirring shaft of the horizontal coating granulation equipment for the lithium battery negative electrode material as claimed in claim 1, is characterized in that: and fixed sealing plates (31) are arranged at two ends of the shaft sleeve (3).

4. The stirring shaft of the horizontal coating granulation equipment for the lithium battery negative electrode material as claimed in claim 2 or 3, wherein: the shaft sleeve (3) is detachably sleeved on the main shaft (1).

5. The stirring shaft of the horizontal coating granulation equipment for the lithium battery negative electrode material as claimed in claim 4, is characterized in that: be provided with notch (32) on axle sleeve (3), be provided with through-hole (33) on notch (32), be provided with screw (11) on main shaft (1), through-hole (33) with screw (11) position corresponds, through-hole (33) with connect through bolt (34) between screw (11), notch (32) intussuseption is filled with insulation material.