Stirring tank

Abstract

The utility model relates to the technical field of stirring, and provides a stirring tank which comprises a tank body, a stirring paddle and a positioning structural part, the stirring paddle can rotate around the axis of the stirring paddle relative to the tank body, the positioning structural part is rotatably connected into the tank body, and the stirring paddle is configured to be capable of being connected with the positioning structural part so that the positioning structural part and the stirring paddle can coaxially rotate. The stirring tank provided by the utility model can solve the problem that in the prior art, the stirring paddle deflects after long-term operation, so that the stirring paddle scratches the inner wall of the tank body.

Description

Technical Field

[0001] The present application relates to the field of stirring technology, and in particular to a stirring tank. Background Art

[0002] In many production operations, stirring is an important production process. For example, stirring slurry is an extremely important process in the lithium-ion production process.

[0003] During the stirring and paddle operation, the stirring paddle stirs the slurry in the tank to complete the stirring and paddle operation. However, the stirring paddle will gradually deviate under long-term high-speed operation. The deviation of the stirring paddle will cause the stirring paddle to scrape against the inner wall of the tank, which will not only damage the stirring paddle and the tank, but also generate debris. The debris generated by the scraping will fall into the slurry and have an adverse effect on the slurry. Utility Model Content

[0004] In view of this, the present application provides a stirring tank to solve the problem in the prior art that the stirring paddle becomes deflected after long-term operation, resulting in the stirring paddle scraping against the inner wall of the tank.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A stirring tank, comprising a tank body, a stirring paddle and a positioning structure, wherein:

[0007] The stirring paddle can rotate around its own axis relative to the tank body, the positioning structure is rotatably connected to the tank body, and the stirring paddle is configured to be connectable to the positioning structure so that the positioning structure and the stirring paddle rotate coaxially.

[0008] Optionally, one of the positioning structure and the stirring paddle is provided with a first docking portion, and the other is provided with a second docking portion, and the first docking portion and the second docking portion are magnetically attracted to each other so that the stirring paddle and the positioning structure are detachably connected.

[0009] Optionally, the first docking portion includes a docking protrusion protruding from the stirring paddle, and the second docking portion includes a docking groove provided on the positioning structure, the docking protrusion and the docking groove are plug-fitted together, and at least one of the docking protrusion and the docking groove is a magnetic attraction component.

[0010] Optionally, the docking protrusion is a truncated cone structure, which includes a first end and a second end arranged opposite to each other, the first end is fixedly connected to the stirring paddle, the second end is opposite to the positioning structure, and the diameter of the second end is smaller than the diameter of the first end.

[0011] Optionally, the tank body includes a relative tank mouth and a tank bottom, the positioning structure includes a fixedly connected turntable and a connecting portion, the connecting portion is rotatably connected to the tank bottom, the turntable is used to be connected to the stirring paddle, and there is a gap between the edge of the turntable and the inner wall of the tank body.

[0012] Optionally, along the direction from the tank mouth to the tank bottom, the projection of the stirring paddle is located within the projection of the rotating disk; or,

[0013] Along the direction from the tank mouth to the tank bottom, the edge of the projection of the stirring paddle is located at the edge of the projection of the turntable.

[0014] Optionally, the connecting portion is detachably connected to the tank bottom.

[0015] Optionally, a clamping hole is provided at the end of the connecting portion facing the tank bottom, a bracket is protruding from the tank bottom, and the stirring tank also includes a bearing, the inner ring of the bearing is connected to the bracket, and the outer ring of the bearing is clamped and connected to the clamping hole, so that the positioning structure is rotatably connected to the tank body through the bearing, and the axis of the bearing coincides with the rotation axis of the stirring paddle, so that the stirring paddle and the positioning structure rotate coaxially.

[0016] Optionally, the mixing tank further comprises a bolt, the inner ring of the bearing is mounted on the bracket, the screw rod of the bolt passes through the bearing hole of the bearing and is threadedly connected to the tank bottom, and the head of the bolt is pressed against the end face of the inner ring of the bearing facing the clamping hole.

[0017] Optionally, the stirring tank includes a cover body, which is openably connected to the tank body, and the cover body is used to seal the tank mouth of the tank body. The cover body is provided with a perforation, and the perforation is used for the stirring paddle to be connected to the external driving mechanism.

[0018] In the embodiment of the present application, the positioning structure is connected to the tank body, and the agitator paddle is positioned by connecting and coaxially rotating with the positioning structure, thereby improving the position stability of the agitator paddle in the tank body and alleviating the problem of the agitator paddle deflecting during rotation and causing the agitator paddle to scratch the inner wall of the tank body. It can be seen that the agitator tank provided by the present application can solve the problem in the prior art that the agitator paddle deflects after long-term operation, causing the agitator paddle to scratch the inner wall of the tank body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0020] Figure 1 An exploded view of a mixing tank provided in an embodiment of the present application;

[0021] Figure 2 A cross-sectional view of a mixing tank provided in an embodiment of the present application;

[0022] Figure 3 This is an exploded view of the interior of a mixing tank provided in an embodiment of the present application.

[0023] exist Figure 1-Figure 3 middle:

[0024] 100, tank body; 110, tank mouth; 120, tank bottom; 130, bracket;

[0025] 200, stirring paddle; 210, docking protrusion;

[0026] 300, positioning structure; 310, docking groove; 320, turntable; 330, connecting part; 331, clamping hole;

[0027] 400, bearings;

[0028] 500, bolts;

[0029] 600. Cover body. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] like Figure 1-Figure 3 As shown, the embodiment of the present application provides a stirring tank, which can be applied to the stirring and slurrying process in the production and manufacturing process of lithium ions. The provided stirring tank includes a tank body 100, a stirring paddle 200 and a positioning structure 300.

[0032] The tank body 100 is used to contain the slurry to be stirred. The stirring paddle 200 can rotate around its own axis relative to the tank body 100. The stirring paddle 200 extends into the tank body 100. The stirring paddle 200 rotates to stir the slurry in the tank body 100. The positioning structure 300 is rotatably connected in the tank body 100. The stirring paddle 200 is configured to be connected to the positioning structure 300 so that the positioning structure 300 and the stirring paddle 200 rotate coaxially, that is, the rotation axis of the stirring paddle 200 coincides with the rotation axis of the positioning structure 300.

[0033] Optionally, the tank body 100 and the stirring paddle 200 may be made of metal to ensure the rigidity of the tank body 100 and the stirring paddle 200. Of course, the tank body 100 and the stirring paddle 200 may also be made of other materials, and the present application does not limit the specific materials of the tank body 100 and the stirring paddle 200. The number of stirring paddles 200 may be one or more. In the case where the number of stirring paddles 200 is multiple, the multiple stirring paddles 200 rotate around the same rotation axis, and the rotation axis of each stirring paddle 200 coincides with the rotation axis of the positioning structure 300.

[0034] In the embodiment of the present application, the positioning structure 300 is connected to the tank body 100, and the stirring paddle 200 is positioned by connecting and coaxially rotating with the positioning structure 300, thereby improving the position stability of the stirring paddle 200 in the tank body 100 and alleviating the problem of the stirring paddle 200 being deflected during rotation and causing the inner wall of the tank body 100 to be scratched. It can be seen that the stirring tank provided by the present application can solve the problem in the prior art that the stirring paddle is deflected after long-term operation, causing the stirring paddle to scratch the inner wall of the tank body.

[0035] At the same time, the scratch problem between the stirring paddle 200 and the inner wall of the tank body 100 can be alleviated, the debris generated by the scratches can be reduced, and the debris can be prevented from mixing into the slurry of the tank body 100, thereby reducing impurities in the slurry. When the stirring tank in the present application is applied to the stirring and slurrying process in the production and manufacturing process of lithium ions, the impurities in the slurry can be reduced, which can improve the safety performance of the battery cell.

[0036] In addition, the positioning structure 300 rotates along with the rotation of the stirring paddle 200 , so that the positioning structure 300 can also stir the slurry, thereby improving the stirring uniformity of the slurry in the tank body 100 .

[0037] There are many methods for connecting the stirring paddle 200 and the positioning structure 300. In an optional embodiment, the stirring paddle 200 and the positioning structure 300 can be connected by welding, bolting, etc.

[0038] In another optional embodiment, one of the positioning structure 300 and the stirring paddle 200 may be provided with a first docking portion and the other may be provided with a second docking portion, and the first docking portion and the second docking portion may be magnetically attracted to each other so that the stirring paddle 200 and the positioning structure 300 can be detachably connected.

[0039] In this case, the stirring paddle 200 and the positioning structure 300 are detachably connected to facilitate the separation of the stirring paddle 200 and the tank body 100. During the specific production operation, the stirring paddle 200 is connected to an external driving mechanism for driving the stirring paddle 200 to rotate. After the stirring operation is completed, the tank body 100 and the stirring paddle 200 are separated, and the tank body 100 can be directly moved to the next process without the need to use additional tools to transport the stirred slurry.

[0040] In addition, the magnetic components in the first docking part and the second docking part can absorb magnetic impurities in the slurry, thereby improving the quality and purity of the slurry. When the stirring tank in the present application is applied to the stirring and slurrying process in the production and manufacturing process of lithium ions, the magnetic components in the first docking part and the second docking part absorb magnetic impurities in the slurry, thereby improving the quality and purity of the slurry, and can enhance the safety performance of the battery cell.

[0041] In order to achieve the magnetic connection between the first docking part and the second docking part, the first docking part and the second docking part can both be magnetic parts such as magnets, and the opposite magnetic poles of the first docking part and the second docking part are opposite, so that the first docking part and the second docking part can be magnetically attracted to each other; or, the first docking part can be a magnetic part such as a magnet, and the second docking part can be a metal structure that can be adsorbed by a magnetic part such as a magnet; or, the first docking part can be a metal structure that can be adsorbed by a magnetic part such as a magnet, and the second docking part can be a magnetic part such as a magnet.

[0042] Optionally, the first docking portion may be fixed to the stirring paddle 200 by welding or bolting, and the second docking portion may be fixed to the positioning structure 300 by welding or bolting.

[0043] In order to improve the connection stability between the stirring paddle 200 and the positioning structure 300, in an embodiment of the present application, the first docking portion may include a docking protrusion 210 protruding from the stirring paddle 200, and the second docking portion may include a docking groove 310 provided on the positioning structure 300, the docking protrusion 210 and the docking groove 310 are plugged into each other, and at least one of the docking protrusion 210 and the docking groove 310 is a magnetic attraction component.

[0044] In this case, the docking protrusion 210 and the inner wall of the docking groove 310 abut against each other. In the process of the stirring paddle 200 driving the positioning structure 300 to rotate, the docking protrusion 210 applies a driving force to the inner wall of the docking groove 310 to drive the positioning structure 300 to rotate, so that the positioning structure 300 rotates with the stirring paddle 200. This prevents the problem that the positioning structure 300 cannot rotate with the rotation of the stirring paddle 200 due to the large resistance of the slurry to the rotation of the positioning structure 300 during the rotation of the stirring paddle 200, thereby causing the positioning structure 300 to detach from the stirring paddle 200. This improves the connection stability between the stirring paddle 200 and the positioning structure 300.

[0045] Optionally, when the docking protrusion 210 is a magnetic component, the material of the docking protrusion 210 can be the same as the material of the magnet, or the docking protrusion 210 can also include a docking body and a magnetic member such as a magnet embedded in the docking body, so that the docking protrusion 210 forms a magnetic component. Similarly, when the docking slot 310 is a magnetic component, the material of the docking slot 310 can be the material of the magnet, or the docking slot 310 can also include a slot body and a magnetic member such as a magnet embedded in the slot body, so that the docking slot 310 forms a magnetic component.

[0046] In the embodiment of the present application, the first docking portion may be a positioning pin, and the second docking portion may be a positioning pin sleeve. The positioning pin and the positioning pin sleeve can be plugged together. Each stirring paddle 200 may be provided with multiple first docking portions, and the second docking portions correspond to the first docking portions one by one.

[0047] In a further technical solution, the docking protrusion 210 may be a truncated cone structure, which includes a first end and a second end disposed opposite to each other, the first end being fixedly connected to the stirring paddle 200, the second end being opposite to the positioning structure 300, and the diameter of the second end being smaller than the diameter of the first end. In this structure, the truncated cone structure has a guiding effect on the docking of the docking protrusion 210 and the docking groove 310, facilitating the plug-in fit of the docking protrusion 210 and the docking groove 310.

[0048] In the above, the positioning structure 300 is rotatably installed in the tank body 100. The positioning structure 300 can be located at the top of the tank body 100 or at the middle of the tank body 100. Of course, in the embodiment of the present application, the positioning structure 300 can also be located at the bottom of the tank body 100.

[0049] Specifically, the tank body 100 may include a relative tank mouth 110 and a tank bottom 120, and the positioning structure 300 may include a fixedly connected turntable 320 and a connecting portion 330, and the connecting portion 330 may be rotatably connected to the tank bottom 120, so that the positioning structure 300 is rotatably connected to the bottom of the tank body 100, and the turntable 320 can be used to connect with the stirring paddle 200 so that the stirring paddle 200 is connected to the positioning structure 300, and there is a gap between the edge of the turntable 320 and the inner wall of the tank body 100 to prevent the turntable 320 from scratching the inner wall of the tank body 100 during rotation.

[0050] In this case, when the stirring paddle 200 rotates, it will drive the turntable 320 to rotate together. The turntable 320 is located at the bottom of the tank body 100, so that the slurry at the bottom of the tank body 100 is also fully stirred, thereby improving the uniformity of the bottom slurry, accelerating the dispersion of the slurry, shortening the stirring time, and preventing the occurrence of agglomeration, uneven dispersion, and substandard fineness.

[0051] Along the direction from the tank mouth 110 to the tank bottom 120 (which can also be understood as the axial direction of the tank body 100), the projection of the stirring paddle 200 can be located within the projection of the turntable 320; or, along the direction from the tank mouth 110 to the tank bottom 120, the edge of the projection of the stirring paddle 200 can be located at the edge of the projection of the turntable 320. In this case, there is also a safety gap between the edge of the stirring paddle 200 and the inner wall of the tank body 100.

[0052] Of course, there is a gap between the edge of the turntable 320 and the inner wall of the tank body 100, so that the slurry can enter the area between the turntable 320 and the bottom wall of the tank body 100 through the gap. In this way, in order to facilitate the cleaning of the area between the turntable 320 and the tank bottom 120, ensure the cleanliness of the tank body 100, and prevent dust and other impurities inside the tank body 100 from mixing into the slurry, in the embodiment of the present application, the connecting portion 330 and the tank bottom 120 can be detachably connected. In this case, after removing the positioning structure 300, the tank body 100 and the positioning structure 300 can be deeply cleaned to ensure the cleanliness of the tank body 100 and the positioning structure 300.

[0053] In the above embodiment, the connection part 330 and the tank bottom 120 are rotatably and detachably connected, and there are various structures to realize the rotatable and detachable connection between the connection part 330 and the tank bottom 120. In an optional embodiment, the tank bottom 120 may be inlaid with a circle of balls, and the balls protrude from the tank bottom 120, and the end of the connection part 330 facing the tank bottom 120 may be provided with a slideway, and the protruding area of ​​the balls may extend into the slideway of the connection part 330, so that the connection part 330 and the tank bottom 120 are rotatably and detachably connected.

[0054] In another optional embodiment, a clamping hole 331 may be provided at the end of the connecting portion 330 facing the tank bottom 120, a bracket 130 may be protruding from the tank bottom 120, and the stirring tank may further include a bearing 400, an inner ring of the bearing 400 is connected to the bracket 130, and an outer ring of the bearing 400 is clamped and connected to the clamping hole 331, so that the positioning structure 300 is rotatably connected to the tank body 100 through the bearing 400, and the axis of the bearing 400 coincides with the rotation axis of the stirring paddle 200.

[0055] It should be noted that, when the outer ring of the bearing 400 is engaged with the engaging hole 331 , the positioning structure 300 can rotate synchronously with the outer ring of the bearing 400 , so that the stirring paddle 200 and the positioning structure 300 rotate coaxially.

[0056] In this case, the turntable 320 and the bearing 400 are both at a certain distance from the tank bottom 120 to prevent the turntable 320 and the bearing 400 from scratching the tank bottom 120 during rotation.

[0057] The bearing 400 includes an inner ring, an outer ring, a retainer and rolling elements. The inner ring and the outer ring are rotatably connected via the rolling elements, and the retainer evenly separates the rolling elements.

[0058] In order to achieve the connection between the inner ring of the bearing 400 and the bracket 130 , in an optional embodiment, the inner ring of the bearing 400 may be connected to the bracket 130 by welding.

[0059] In another optional embodiment, the mixing tank may further include a bolt 500, the inner ring of the bearing 400 may be mounted on the bracket 130, the screw of the bolt 500 may pass through the bearing hole of the bearing 400 (i.e., the hole surrounded by the inner ring) and be threadedly connected to the tank bottom 120, and the head of the bolt 500 is pressed against the end face of the inner ring facing the clamping hole 331, so that the inner ring of the bearing 400 is fixedly connected to the tank bottom 120 through the bolt 500, and the outer ring of the bearing 400 can rotate relative to the inner ring. In this case, after the paddle is closed, the positioning structure 300 can be disassembled from the bearing 400, and after the bolt 500 is removed, the bearing 400 is also removed, so that the tank body 100, the positioning structure 300 and the bearing 400 are deeply cleaned and kept clean.

[0060] When stirring and paddle combination is required, the tank body 100 is positioned at the specified position, and the stirring paddle 200 slowly falls and moves toward the inside of the tank body 100. When it falls to a certain height, the second docking part on the positioning structure 300 and the magnetic attraction of the first docking part on the stirring paddle 200 drive the bearing 400 and the positioning structure 300 to rotate, so that the second docking part is positioned directly below the first docking part, and the first docking part continues to fall with the stirring paddle 200 until it is just inserted into the docking groove 310 of the second docking part.

[0061] A clamping hole 331 is provided at the end of the connecting part 330 facing the tank bottom 120, and the positioning structure 300 clamps the outer ring of the bearing 400 through the clamping hole 331 of the connecting part 330. When the first docking part is inserted into the docking groove 310 of the second docking part, the stirring paddle 200 is also fixed on the turntable 320. At the same time, the stirring paddle 200 applies a pressure to the positioning structure 300, so that the clamping hole 331 of the positioning structure 300 clamps the outer ring of the bearing 400, and also fixes the stirring paddle 200 on the positioning structure 300, thereby preventing the stirring paddle 200 from being skewed during rotation.

[0062] In order to prevent the slurry from splashing out of the tank mouth 110 of the tank body 100 during the stirring and paddle-joining process, the stirring tank can also include a cover body 600, which is openably connected to the tank body 100, and the cover body 600 is used to seal the tank mouth 110 of the tank body 100. The cover body 600 is provided with a perforation, and the perforation is used for the stirring paddle 200 to be connected to the external driving mechanism. The stirring paddle 200 is connected to the external driving mechanism, and the external driving mechanism drives the stirring paddle 200 to rotate around its own axis relative to the tank body 100.

[0063] Optionally, the cover body 600 can be directly mounted on the tank body 100 to achieve the connection between the cover body 600 and the tank body 100, or the cover body 600 and the tank body 100 can also be connected by bolt connection or the like, which is not limited in this document.

[0064] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0065] The block diagrams of the devices, tanks, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, tanks, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The word "such as" used here refers to the phrase "such as but not limited to", and can be used interchangeably with it.

[0066] It should also be noted that in the tank, device and method of the present application, each component or each step can be decomposed and / or reassembled. These decompositions and / or reassemblies should be regarded as equivalent solutions of the present application.

[0067] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0068] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used to more clearly explain the technical solutions and cannot be used to limit the scope of protection of the present application.

[0069] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A stirring tank, characterized in that: The invention comprises a tank body (100), a stirring paddle (200) and a positioning structure (300), wherein: The stirring paddle (200) can rotate around its own axis relative to the tank body (100), the positioning structure (300) is rotatably connected in the tank body (100), and the stirring paddle (200) is configured to be connectable to the positioning structure (300) so that the positioning structure (300) and the stirring paddle (200) rotate coaxially.

2. The stirring tank according to claim 1, characterized in that: In the positioning structure (300) and the stirring paddle (200), one is provided with a first docking portion, and the other is provided with a second docking portion, and the first docking portion and the second docking portion are magnetically attracted to each other, so that the stirring paddle (200) and the positioning structure (300) are detachably connected.

3. The stirring tank according to claim 2, characterized in that: The first docking portion comprises a docking protrusion (210) protruding from the stirring paddle (200), and the second docking portion comprises a docking groove (310) provided on the positioning structure (300), the docking protrusion (210) and the docking groove (310) are plug-fitted to each other, and at least one of the docking protrusion (210) and the docking groove (310) is a magnetic attraction component.

4. The stirring tank according to claim 3, characterized in that: The docking protrusion (210) is a truncated cone-shaped structure, comprising a first end and a second end disposed opposite to each other, the first end being fixedly connected to the stirring paddle (200), the second end being opposite to the positioning structure (300), and the diameter of the second end being smaller than the diameter of the first end.

5. The stirring tank according to claim 1, characterized in that: The tank body (100) comprises a tank mouth (110) and a tank bottom (120) which are opposite to each other. The positioning structure (300) comprises a rotating disk (320) and a connecting portion (330) which are fixedly connected. The connecting portion (330) is rotatably connected to the tank bottom (120). The rotating disk (320) is used to be connected to the stirring paddle (200). There is a gap between the edge of the rotating disk (320) and the inner wall of the tank body (100).

6. The stirring tank according to claim 5, characterized in that: Along the direction from the tank opening (110) to the tank bottom (120), the projection of the stirring paddle (200) is located within the projection of the rotating disk (320); or, Along the direction from the tank mouth (110) to the tank bottom (120), the edge of the projection of the stirring paddle (200) is located at the edge of the projection of the rotating disk (320).

7. The stirring tank according to claim 5, characterized in that: The connecting portion (330) is detachably connected to the tank bottom (120).

8. The stirring tank according to claim 7, characterized in that: The end of the connecting portion (330) facing the tank bottom (120) is provided with a clamping hole (331), and the tank bottom (120) is protrudingly provided with a bracket (130). The stirring tank further comprises a bearing (400), the inner ring of the bearing (400) is connected to the bracket (130), and the outer ring of the bearing (400) is clamped and connected to the clamping hole (331), so that the positioning structure (300) and the tank body (100) are rotatably connected through the bearing (400), and the axis of the bearing (400) coincides with the rotation axis of the stirring paddle (200), so that the stirring paddle (200) and the positioning structure (300) rotate coaxially.

9. The stirring tank according to claim 8, characterized in that: The stirring tank further comprises a bolt (500), the inner ring of the bearing (400) is mounted on the bracket (130), the screw of the bolt (500) passes through the bearing hole of the bearing (400) and is threadedly connected to the tank bottom (120), and the head of the bolt (500) is pressed against the end face of the inner ring of the bearing (400) facing the clamping hole (331).

10. The stirring tank according to claim 1, characterized in that: The stirring tank comprises a cover body (600), wherein the cover body (600) is connected to the tank body (100) in an openable and closable manner, and the cover body (600) is used to seal the tank mouth (110) of the tank body (100). The cover body (600) is provided with a through hole, and the through hole is used for the stirring paddle (200) to be connected to the external driving mechanism.

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