Accommodating cylinder assembly, impeller mechanism and pulping device

Abstract

The utility model relates to a containing cylinder assembly, an impeller mechanism and a pulping device. The accommodating cylinder assembly comprises an outer cylinder; the inner cylinder sleeves the inner side of the outer cylinder and is detachably connected with the outer cylinder; an interlayer space for a cooling medium to flow through is formed between the outer cylinder and the inner cylinder, and an inner cavity of the inner cylinder is used for accommodating slurry. Therefore, a welding assembly mode is avoided, so that slurry pollution caused by leakage of a cooling medium due to weld joint cracking is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing equipment, in particular to a receiving tube component, an impeller mechanism and a pulping device. Background Art

[0002] Pulping technology is widely used in modern industrial production, such as lithium battery pulping technology. In the pulping process of lithium batteries, the pulping device can be a pulping machine or a disperser. In actual production, the powder and liquid are transported to the pulping device for mixing and dispersion to obtain a homogeneous slurry. The more uniform the slurry obtained, the better the performance of the prepared lithium battery. The pulping device includes a receiving tube assembly for receiving the slurry and an impeller arranged in the receiving tube assembly. The impeller rotates to stir and disperse the slurry. A large amount of heat will be generated in the process of stirring and dispersing the slurry, resulting in excessive temperature. In order to cool the slurry, a cooling channel for the cooling medium to pass through needs to be provided on the receiving tube assembly. However, in the prior art, the receiving tube assembly is assembled by welding, and the weld at the joint of the cooling channel is prone to cracking, thereby causing the cooling medium to enter the interior of the receiving tube assembly and contaminate the slurry. Utility Model Content

[0003] Based on this, it is necessary to provide a containing tube assembly, an impeller mechanism and a pulping device that improve the above defects, in view of the problem that the welds at the joints of the cooling channels are prone to cracking, thereby causing the cooling medium to enter the interior of the containing tube assembly and contaminate the slurry.

[0004] A receiving tube assembly, comprising:

[0005] outer cylinder;

[0006] The inner cylinder is sleeved on the inner side of the outer cylinder and is detachably connected to the outer cylinder; an interlayer space for cooling medium to flow through is formed between the outer cylinder and the inner cylinder, and the inner cavity of the inner cylinder is used to accommodate slurry.

[0007] In one embodiment, one end of the outer tube has a mounting port connected to the inner cavity of the outer tube, and the inner tube has a first end and a second end opposite to the first end, the first end is located in the inner cavity of the outer tube, and the second end is located at the mounting port;

[0008] The receiving tube assembly also includes a pressure plate, a first seal and a second seal. The pressure plate is located at the installation port and is detachably fixedly connected to the outer tube and cooperates with the second end stop to limit the inner tube from exiting the installation port. The first seal is arranged between the first end and the outer tube, and the second seal is arranged between the second end and the outer tube.

[0009] In one embodiment, a limiting boss is provided on the inner wall of the outer cylinder, and the limiting boss abuts against the first end to limit the inner cylinder between the limiting boss and the pressure plate.

[0010] In one embodiment, the first sealing member is disposed between the limiting boss and the first end.

[0011] In one embodiment, the inner wall of the outer cylinder has a rotation-stopping portion, and the outer wall of the inner cylinder has a rotation-stopping fitting portion, and the rotation-stopping portion and the rotation-stopping fitting portion are rotation-stoppingly fitted to limit the relative rotation of the inner cylinder and the outer cylinder.

[0012] In one of the embodiments, one of the anti-rotation portion and the anti-rotation matching portion is an anti-rotation protrusion, and the other is the anti-rotation groove, and the anti-rotation protrusion is positioned and matched in the anti-rotation groove.

[0013] In one embodiment, the outer wall of the inner tube has a first fin protruding toward the interlayer space, and / or the inner wall of the outer tube has a second fin protruding toward the interlayer space.

[0014] In one embodiment, the receiving tube assembly further comprises a wear-resistant lining, and the wear-resistant lining is sleeved on the inner side of the inner tube and tightly matched with the inner tube; or

[0015] A wear-resistant layer is formed on the inner wall of the inner cylinder.

[0016] In one embodiment, the outer cylinder has a liquid inlet and a liquid outlet connected to the interlayer space, the liquid inlet is used for cooling medium to flow into the interlayer space, and the liquid outlet is used for cooling medium in the interlayer space to be discharged.

[0017] An impeller mechanism comprises an impeller and a receiving tube assembly as described in any one of the above embodiments, wherein the impeller is arranged in the inner cavity of the inner tube and can rotate relative to the inner tube in a controlled manner.

[0018] A pulping device comprises the impeller mechanism as described in any of the above embodiments.

[0019] The above-mentioned receiving tube assembly, impeller mechanism and slurry making device sleeve the inner tube inside the outer tube, and use a detachable connection method to realize the connection between the inner tube and the outer tube, so that an interlayer space for the cooling medium to flow through is formed between the inner tube and the outer tube. Compared with the prior art, the welding assembly method is avoided, and the leakage of the cooling medium due to cracking of the weld is avoided to pollute the slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a partial cross-sectional view of a receiving tube assembly in one embodiment of the utility model;

[0021] Figure 2 for Figure 1 A cross-sectional view of the receiving tube assembly shown;

[0022] Figure 3 for Figure 1 The exploded structural diagram of the receiving tube assembly shown;

[0023] Figure 4 for Figure 1 A schematic structural diagram of the outer cylinder of the receiving cylinder assembly shown;

[0024] Figure 5 for Figure 1 A schematic structural diagram of the inner cylinder of the receiving cylinder assembly shown;

[0025] Figure 6 2 is a cross-sectional view of an inner tube and a wear-resistant inner village of a receiving tube assembly in another embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0032] An embodiment of the utility model provides a pulping device, including an impeller mechanism, the impeller mechanism including a receiving tube assembly and an impeller. The receiving tube assembly is used to receive a slurry formed by mixing a powder and a liquid. The impeller is rotatably arranged in the receiving tube assembly to stir the slurry in the receiving tube assembly, thereby achieving mixing and dispersion of the slurry.

[0033] It should be noted that the pulping device may include one impeller mechanism, and of course, may also include multiple impeller mechanisms. When the pulping device includes multiple impeller mechanisms, the slurry passes through the receiving tube assembly of each impeller mechanism in turn, and is stirred and dispersed in multiple passes, and finally obtains a slurry with a certain viscosity and a certain solid content. It is understandable that the impeller of each impeller mechanism, in addition to stirring and dispersing the slurry, also plays a role in transporting the slurry downstream, so that the slurry passes through each impeller mechanism in turn for multiple stirring and dispersion.

[0034] See also Figures 1 to 3 In the embodiment of the present application, the receiving tube assembly includes an outer tube 10 and an inner tube 20. The inner tube 20 is sleeved on the inner side of the outer tube 10 and is detachably connected to the outer tube 10. A clamping space A for a cooling medium to flow through is formed between the outer tube 10 and the inner tube 20. The inner cavity of the inner tube 20 is used to accommodate the slurry, so that the cooling medium flowing through the clamping space A is used to cool the slurry to avoid overheating of the slurry. The impeller is rotatably arranged in the inner cavity of the inner tube 20, so that the slurry in the inner cavity of the inner tube 20 can be stirred and dispersed when the impeller rotates. In this way, the inner tube 20 is sleeved in the outer tube 10, and the connection between the inner tube 20 and the outer tube 10 is realized by a detachable connection method, so that an interlayer space for the cooling medium to flow through is formed between the inner tube 20 and the outer tube 10. Compared with the prior art assembly method using welding, the present application avoids the assembly method using welding, and avoids the leakage of the cooling medium due to the cracking of the weld and the contamination of the slurry.

[0035] It should be noted that, since the inner cylinder 20 and the outer cylinder 10 are assembled in a detachable manner, when the inner cylinder 20 is damaged, the inner cylinder 20 can be removed from the outer cylinder 10 and replaced with a new inner cylinder 20 to be assembled into the outer cylinder 10. In other words, the inner cylinder 20 can be replaced alone, without having to replace the inner cylinder 20 and the outer cylinder 10 at the same time, which greatly reduces the maintenance cost.

[0036] In the embodiment of the present application, one end of the outer cylinder 10 has a mounting port 11 connected to the inner cavity of the outer cylinder 10. The inner cylinder 20 has a first end 21 and a second end 22 opposite to the first end 21. The inner cylinder 20 is sleeved on the inner side of the outer cylinder 10 by the mounting port 11, and the first end 21 of the inner cylinder 20 is located in the inner cavity of the outer cylinder 10, and the second end 22 of the inner cylinder 20 is located at the mounting port 11. The receiving cylinder assembly also includes a pressing plate 30, a first sealing member 40 and a second sealing member 50. The pressing plate 30 is located at the mounting port 11, and is detachably fixedly connected to the outer cylinder 10, and cooperates with the second end 22 of the inner cylinder 20 to limit the inner cylinder 20 from exiting the inner cavity of the outer cylinder 10 from the mounting port 11, that is, the inner cylinder 20 is limited in the inner cavity of the outer cylinder 10. Optionally, the pressing plate 30 can be fixed on the outer cylinder 10 by a plurality of bolts.

[0037] The first seal 40 is arranged between the first end 21 of the inner tube 20 and the outer tube 10, so as to seal the gap between the first end 21 of the inner tube 20 and the outer tube 10; the second seal 50 is arranged between the second end 22 of the inner tube 20 and the outer tube 10, so as to seal the gap between the second end 22 of the inner tube 20 and the outer tube 10, and then the first seal 40 and the second seal 50 are used to seal the interlayer space A, so as to prevent the cooling medium in the interlayer space A from entering the inner cavity of the inner tube 20 and contaminating the slurry. In this way, the inner tube 20 is limited in the outer tube 10 by the pressing plate 30, and the interlayer space A between the inner tube 20 and the outer tube 10 is sealed by the first seal 40 and the second seal 50, so as to prevent the cooling medium in the interlayer space A from leaking and contaminating the slurry in the inner tube 20.

[0038] It is understandable that, in actual use, the inner cylinder 20 can be replaced by removing the pressing plate 30. The operation of replacing the inner cylinder 20 is simple and quick, which greatly reduces the maintenance cost.

[0039] Specifically in the embodiment, the inner wall of the outer cylinder 10 is provided with a limiting boss 15, and the limiting boss 15 abuts against the first end 21 of the inner cylinder 20 to limit the inner cylinder 20 between the limiting boss 15 and the pressure plate 30 to prevent the inner cylinder 20 from moving in the axial direction. Optionally, a first sealing member 40 is provided between the limiting boss 15 and the first end 21, thereby sealing the gap between the limiting boss 15 and the first end 21 of the inner cylinder 20 to prevent the cooling medium in the interlayer space A from leaking from the first end 21 of the inner cylinder 20.

[0040] Thus, during assembly, first, the first sealing member 40 is sleeved on the first end 21 of the inner cylinder 20, and the second sealing ring is sleeved on the second end 22 of the inner cylinder 20; then, the first end 21 of the inner cylinder 20 is inserted into the outer cylinder 10 through the mounting opening 11 of the outer cylinder 10 until the first end 21 of the inner cylinder 20 abuts against the limiting boss 15; then, the pressing plate 30 is locked and fixed at the mounting opening 11 of the outer cylinder 10 by the bolt 60, so that the pressing plate 30 abuts against the second end 22 of the inner cylinder 20, thereby limiting the inner cylinder 20 between the pressing plate 30 and the limiting boss 15, and preventing the inner cylinder 20 from moving axially relative to the outer cylinder 10.

[0041] See also Figure 4 and Figure 5 In some embodiments, the inner wall of the outer cylinder 10 is provided with a rotation stop portion 16, and the outer wall of the inner cylinder 20 is provided with a rotation stop portion 24. The rotation stop portion 16 and the rotation stop portion 24 are rotation stop matched with each other to limit the inner cylinder 20 and the outer cylinder 10 from rotating relative to each other. In this way, the inner cylinder 20 is limited to move axially relative to the outer cylinder 10 by the limiting boss 15 and the pressure plate 30, and the rotation stop portion 16 and the rotation stop portion 24 are used to limit the inner cylinder 20 from rotating relative to the outer cylinder 10, so that the inner cylinder 20 and the outer cylinder 10 are relatively fixed.

[0042] Optionally, the anti-rotation matching portion 24 may be an anti-rotation groove, and the anti-rotation portion 16 may be an anti-rotation protrusion, which is positioned and matched in the anti-rotation groove, so that the anti-rotation groove is used to limit the anti-rotation protrusion, thereby preventing the inner cylinder 20 from rotating relative to the outer cylinder 10. Of course, in other embodiments, the anti-rotation matching portion 24 may be an anti-rotation protrusion, and the anti-rotation portion 16 may be an anti-rotation groove, as long as the anti-rotation effect can be achieved, and this is not limited here.

[0043] It should be noted that the cross section of the outer cylinder 10 is annular, the cross section of the inner cylinder 20 is also annular, and the outer dimensions of the inner cylinder 20 match the inner cavity dimensions of the outer cylinder 10 , so that the inner cylinder 20 can be sleeved in the outer cylinder 10 .

[0044] Of course, in other embodiments, the cross-sectional areas of the outer tube 10 and the inner tube 20 may also be other shapes, such as a rectangle, as long as the inner tube 20 can be sleeved in the outer tube 10 through the mounting opening 11 and form an interlayer space A, which is not limited here.

[0045] It is understandable that the above-mentioned anti-rotation portion 16 and anti-rotation matching portion 24 are only required to be provided for anti-rotation when the cross-sections of the outer cylinder 10 and the inner cylinder 20 are annular. When the cross-sections of the outer cylinder 10 and the inner cylinder 20 are not annular, the outer cylinder 10 and the inner cylinder 20 will not rotate relative to each other, and thus the above-mentioned anti-rotation portion 16 and anti-rotation matching portion 24 are not required to be provided for anti-rotation.

[0046] Specifically, the pressure plate 30 extends in a ring shape along the edge of the mounting opening 11 , the outer edge of the pressure plate 30 is fixed to the outer cylinder 10 by bolts, and the inner edge of the pressure plate 30 abuts against the second end 22 of the inner cylinder 20 , thereby pressing the inner cylinder 20 onto the limiting boss 15 .

[0047] In some embodiments, the outer wall of the inner tube 20 has a first fin 23 protruding toward the interlayer space A. The provision of the first fin 23 can, on the one hand, strengthen the inner tube 20 to enhance the strength of the inner tube 20; on the other hand, it can increase the heat exchange area; on the other hand, the first fin 23 can slow down the flow rate of the cooling medium in the interlayer space A, so that the cooling medium in the interlayer space A and the slurry in the inner tube 20 can fully exchange heat, which is conducive to improving the cooling efficiency of the slurry. It can be understood that the number of the first fin 23 can be one or more, which is not limited here.

[0048] In some embodiments, the inner wall of the outer cylinder 10 has a second fin 12 protruding toward the interlayer space A. The second fin 12 can, on the one hand, strengthen the outer cylinder 10 to enhance the strength of the outer cylinder 10; on the other hand, it can increase the heat exchange area; on the other hand, the second fin 12 can slow down the flow rate of the cooling medium in the interlayer space A, so that the cooling medium in the interlayer space A and the slurry in the inner cylinder 20 can fully exchange heat, which is conducive to improving the cooling efficiency of the slurry. It can be understood that the number of the second fin 12 can be one or more, which is not limited here.

[0049] It should be noted that in some embodiments, the first fin 23 and the second fin 12 can be provided at the same time. In other embodiments, only the first fin 23 or only the second fin 12 can be provided. The number of the first fin 23 and the second fin 12 is set according to actual conditions and is not limited here.

[0050] See also Figure 6 In the embodiment of the present application, the receiving tube assembly further includes a wear-resistant lining 70, which is sleeved on the inner side of the inner tube 20 and is tightly matched with the inner tube 20. In this way, since the wear-resistant lining 70 is arranged on the inner side of the inner tube 20, the wear-resistant lining 70 is directly in contact with the slurry in the inner cavity of the inner tube 20, thereby avoiding the inner tube 20 from directly contacting with the slurry and causing wear, thereby avoiding the material generated by the wear of the inner tube 20 from entering the slurry and causing contamination to the slurry. In some embodiments, the thickness of the wear-resistant lining 70 is 5 mm to 20 mm, preferably 10 mm or 12 mm.

[0051] In order to further improve the wear resistance of the wear-resistant lining 70, it is necessary to polish the inner wall of the wear-resistant lining 70. Preferably, the inner wall of the wear-resistant lining 70 is polished to 300 mesh or above.

[0052] Optionally, the wear-resistant lining 70 may be made of silicon carbide ceramic lining, that is, the material of the wear-resistant lining 70 may be silicon carbide ceramic, which has good wear resistance, thereby avoiding wear; at the same time, the thermal conductivity is also good, which is conducive to improving the cooling effect of the slurry. The inner cylinder 20 may be made of alumina inner cylinder, that is, the material of the inner cylinder 20 may be alumina, which has good thermal conductivity and can meet the strength requirements. Of course, in other embodiments, the wear-resistant lining 70 may also be made of other materials that are wear-resistant and have good thermal conductivity, which is not limited here. Similarly, the inner cylinder 20 may also be made of other materials that have good thermal conductivity and meet the strength requirements, which is not limited here.

[0053] It should be noted that the wear-resistant lining 70 is not necessary, and the wear resistance can also be improved by strengthening the surface of the inner wall of the inner cylinder 20. For example, one or more layers of wear-resistant material can be plated on the inner wall of the inner cylinder 20, that is, a wear-resistant layer is formed on the inner wall of the inner cylinder 20, and the wear-resistant layer plays a role of wear resistance and heat conduction.

[0054] See also Figure 4 Specifically, in the embodiment, the outer cylinder 10 has a liquid inlet 13 and a liquid outlet 14 that are connected to the interlayer space A. The liquid inlet 13 is used to communicate with an external infusion pipeline, so that the cooling medium transported by the external infusion pipeline enters the interlayer space A through the liquid inlet 13. The liquid outlet 14 is used to communicate with an external drainage pipeline, so that the cooling medium in the interlayer space A can be discharged to the external drainage pipeline through the liquid outlet 14, thereby taking away the heat of the slurry, that is, cooling the slurry.

[0055] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A storage tube assembly, characterized in that: include: outer cylinder (10); The inner cylinder (20) is sleeved on the inner side of the outer cylinder (10) and is detachably connected to the outer cylinder (10); an interlayer space (A) for a cooling medium to flow through is formed between the outer cylinder (10) and the inner cylinder (20); and the inner cavity of the inner cylinder (20) is used to accommodate slurry.

2. The storage tube assembly according to claim 1, characterized in that: One end of the outer cylinder (10) has a mounting opening (11) communicating with the inner cavity of the outer cylinder (10); the inner cylinder (20) has a first end (21) and a second end (22) opposite to the first end (21); the first end (21) is located in the inner cavity of the outer cylinder (10), and the second end (22) is located at the mounting opening (11); The receiving tube assembly further comprises a pressure plate (30), a first sealing member (40) and a second sealing member (50); the pressure plate (30) is located at the installation opening (11) and is detachably fixedly connected to the outer tube (10), and cooperates with a stopper at the second end (22) to limit the inner tube (20) from exiting from the installation opening (11); the first sealing member (40) is arranged between the first end (21) and the outer tube (10), and the second sealing member (50) is arranged between the second end (22) and the outer tube (10).

3. The storage tube assembly according to claim 2, characterized in that: The inner wall of the outer cylinder (10) is provided with a limiting boss (15), and the limiting boss (15) abuts against the first end (21) to limit the inner cylinder (20) between the limiting boss (15) and the pressure plate (30).

4. The storage tube assembly according to claim 3, characterized in that: The first sealing member (40) is arranged between the limiting boss (15) and the first end (21).

5. The storage tube assembly according to claim 2, characterized in that: The inner wall of the outer cylinder (10) is provided with a rotation-stopping portion (16), and the outer wall of the inner cylinder (20) is provided with a rotation-stopping fitting portion (24). The rotation-stopping portion (16) and the rotation-stopping fitting portion (24) are rotation-stoppingly fitted to limit the relative rotation of the inner cylinder (20) and the outer cylinder (10).

6. The storage tube assembly according to claim 5, characterized in that: One of the rotation-stopping portion (16) and the rotation-stopping matching portion (24) is a rotation-stopping protrusion, and the other of the rotation-stopping portion (16) and the rotation-stopping matching portion (24) is a rotation-stopping groove; The anti-rotation protrusion is positioned and matched in the anti-rotation groove.

7. The storage tube assembly according to claim 1, characterized in that: The outer wall of the inner tube (20) has a first fin (23) protruding toward the interlayer space (A), and / or the inner wall of the outer tube (10) has a second fin (12) protruding toward the interlayer space (A).

8. The storage tube assembly according to claim 1, characterized in that: The receiving tube assembly further comprises a wear-resistant inner lining (70), wherein the wear-resistant inner lining (70) is sleeved on the inner side of the inner tube (20) and is tightly fitted with the inner tube (20); or A wear-resistant layer is formed on the inner wall of the inner cylinder (20).

9. The storage tube assembly according to claim 1, characterized in that: The outer cylinder (10) is provided with a liquid inlet (13) and a liquid outlet (14) which are in communication with the interlayer space (A); the liquid inlet (13) is used for allowing a cooling medium to flow into the interlayer space (A), and the liquid outlet (14) is used for allowing the cooling medium in the interlayer space (A) to be discharged.

10. An impeller mechanism, characterized in that: It comprises an impeller and a receiving tube assembly as claimed in any one of claims 1 to 9, wherein the impeller is arranged in the inner cavity of the inner tube (20) and can rotate relative to the inner tube (20) in a controllable manner.

11. A pulping device, characterized in that: Comprising the impeller mechanism as claimed in claim 10.

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