Stirring paddle

Abstract

The utility model relates to the technical field of liquid mixing, in particular to a stirring paddle which comprises a stirring shaft, the plurality of paddles are arranged at intervals along the axial direction of the stirring shaft; mounting holes corresponding to the paddles are formed in the stirring shaft in a penetrating manner, the paddles are adaptively arranged in the mounting holes in a penetrating manner in the direction perpendicular to the axial direction of the stirring shaft, and the paddles are in sliding fit with the mounting holes; the positioning shaft is slidably arranged in the stirring shaft in a penetrating manner from the bottom of the stirring shaft, and the positioning shaft sequentially penetrates through the multiple paddles in the axial direction of the stirring shaft and is suitable for limiting the paddles to move in the direction perpendicular to the axial direction of the stirring shaft; and the locking block is detachably connected to the bottom end of the stirring shaft and is suitable for locking the positioning shaft in the stirring shaft. The technical problems that an existing stirring paddle is high in maintenance cost and tedious in replacement, and the working efficiency is affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid mixing, in particular to a stirring paddle. Background Art

[0002] The existing agitator paddles usually include an agitator shaft and blades, which are welded together into one piece. After a period of use, when the blades become worn, the agitator paddle can only be replaced as a whole, which increases the equipment maintenance cost. The replacement process is relatively cumbersome, affecting work efficiency. Utility Model Content

[0003] The utility model provides a stirring paddle, which solves the technical problems of high maintenance cost and complicated replacement of the existing stirring paddle, which affects the work efficiency.

[0004] In view of this, the utility model provides a stirring paddle, comprising:

[0005] Stirring shaft;

[0006] A plurality of blades are arranged at intervals along the axial direction of the stirring shaft; a mounting hole is provided on the stirring shaft corresponding to each of the blades, and the blades are adapted to be inserted into the mounting hole along a direction perpendicular to the axial direction of the stirring shaft, and the blades are slidably matched with the mounting holes;

[0007] A positioning shaft is slidably disposed in the stirring shaft from the bottom of the stirring shaft, and the positioning shaft sequentially penetrates the plurality of blades along the axial direction of the stirring shaft, and is suitable for limiting the movement of the blades along a direction perpendicular to the axial direction of the stirring shaft;

[0008] The locking block is detachably connected to the bottom end of the stirring shaft and is suitable for locking the positioning shaft in the stirring shaft.

[0009] Optionally, the plurality of blades are staggered in the axial direction of the stirring shaft.

[0010] Optionally, the mounting hole located at the bottom of the stirring shaft is connected to the bottom of the stirring shaft through a slot, and the locking block is arranged in the slot.

[0011] Optionally, the paddle is penetrated by a positioning hole for the positioning shaft to pass through; a through hole is provided in the stirring shaft along its axial direction, the bottom of the through hole is connected to the bottom of the stirring shaft, and the through hole and the positioning hole are coaxially arranged; the diameters of the through hole and the positioning hole are both adapted to the diameter of the positioning shaft; the positioning shaft is suitable for being sequentially inserted into the through hole and multiple positioning holes.

[0012] Optionally, an annular groove is concavely provided on the blade at the outer periphery of the positioning hole, and a sealing ring is provided in the annular groove.

[0013] Optionally, the top end of the through hole is sealed, and an elastic member is provided in the through hole; one end of the elastic member abuts against the top of the through hole, and the other end abuts against the positioning shaft.

[0014] Optionally, the surface of the blade is provided with a wear-resistant coating.

[0015] Optionally, the wear-resistant coating is a ceramic coating or a diamond coating.

[0016] Optionally, a plurality of stirring blocks are provided at the bottom of the paddle located at the bottom of the stirring shaft.

[0017] Optionally, a groove is provided on the top of the locking block corresponding to the positioning shaft, and the size of the groove matches the size of the positioning shaft;

[0018] And / or, the locking block is connected to the stirring shaft via screws;

[0019] And / or, both ends of the paddle extending out of the stirring shaft are stirring parts, and the stirring part is provided with a blade, and the blade faces the rotation direction;

[0020] And / or, a flange is provided at the top end of the stirring shaft, suitable for being connected to an external driving device through the flange.

[0021] The technical solution of the utility model has the following advantages:

[0022] In the utility model, when it is necessary to install the paddle, the paddle can be first slid and penetrated into the mounting hole on the stirring shaft, and the mounting hole is adapted to the paddle so that the paddle is adapted to penetrate into the mounting hole, so as to prevent the paddle from shaking and the material from penetrating into the mounting hole during use, thereby improving stability and sealing performance. Then, the positioning shaft is passed through the bottom of the stirring shaft in sequence and penetrated into the stirring shaft, so that the paddle is clamped on the stirring shaft to prevent it from detaching from the stirring shaft during use. Then, the bottom of the positioning shaft is abutted against by the locking block connected to the bottom end of the stirring shaft, and the positioning shaft is locked in the stirring shaft to prevent the positioning shaft from falling off under the action of gravity. When it is necessary to replace the paddle, the locking block is disassembled, and the positioning shaft is then pulled out of the mounting hole of the stirring shaft, so that the corresponding paddle can be pulled out of the stirring shaft for replacement. The replacement method is convenient and quick. During maintenance, only the paddle needs to be replaced, and there is no need to replace the stirring paddle as a whole, thereby reducing maintenance costs, improving overall reliability and service life, and the installation method in which the paddle is embedded in the stirring shaft as a whole has greater connection strength, further improving service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of a stirring paddle provided by the utility model at a first viewing angle;

[0025] Figure 2 for Figure 1 An overall cross-sectional view of the stirring paddle in FIG.

[0026] Figure 3 A schematic diagram of the structure of the stirring shaft provided by the utility model at a first viewing angle;

[0027] Figure 4 An overall cross-sectional view of another stirring paddle provided by the utility model;

[0028] Figure 5 A schematic diagram of the structure of another stirring paddle provided by the utility model at a second viewing angle;

[0029] Figure 6 for Figure 5 Sectional view at AA;

[0030] Figure 7 for Figure 5 A schematic diagram of the structure of the stirring paddle at a third viewing angle;

[0031] Figure 8 for Figure 5 A schematic diagram of the structure of the stirring paddle at the fourth viewing angle;

[0032] Fig. 9 for Figure 5 A schematic diagram of the structure of the stirring paddle at the fifth viewing angle;

[0033] Fig.10 for Figure 5 A schematic diagram of the structure of the stirring paddle at the sixth viewing angle;

[0034] Fig.11 A top view of the blade provided by the utility model;

[0035] Fig.12 A side view of the blade provided by the utility model;

[0036] Fig.13 Another side view of the blade provided by the utility model.

[0037] Description of reference numerals:

[0038] 1. Stirring shaft; 2. Paddle; 3. Positioning shaft; 4. Locking block; 5. Mounting hole; 6. Positioning hole; 7. Sealing ring; 8. Through hole; 9. Elastic part; 10. Screw; 11. Flange; 12. Connecting hole; 13. Stirring block; 14. Groove. DETAILED DESCRIPTION

[0039] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0043] Example 1

[0044] See also Figures 1 to 13A stirring paddle comprises: a stirring shaft 1; a plurality of paddle blades 2, which are arranged at intervals along the axial direction of the stirring shaft 1; a mounting hole 5 is penetrated on the stirring shaft 1 corresponding to each paddle blade 2, and the paddle blade 2 is adapted to be penetrated in the mounting hole 5 along a direction perpendicular to the axial direction of the stirring shaft 1, and the paddle blade 2 and the mounting hole 5 are slidably matched; a positioning shaft 3, which is slidably penetrated in the stirring shaft 1 from the bottom of the stirring shaft 1, and the positioning shaft 3 sequentially penetrates a plurality of paddle blades 2 along the axial direction of the stirring shaft 1, and is suitable for limiting the movement of the paddle blades 2 in a direction perpendicular to the axial direction of the stirring shaft 1; a locking block 4, which is detachably connected to the bottom end of the stirring shaft 1, and is suitable for locking the positioning shaft 3 in the stirring shaft 1.

[0045] It should be noted that the positioning shaft 3 is slidably matched with the blade 2, and the top end of the stirring shaft 1 is suitable for being driven and connected to the driving device; the middle position of the blade 2 is inserted into the mounting hole 5, and the size of the blade 2 is adapted to the size of the mounting hole 5.

[0046] In this embodiment, when the paddle 2 needs to be installed, the paddle 2 can be first slid into the mounting hole 5 on the stirring shaft 1, and the mounting hole 5 is adapted to the paddle 2, so that the paddle 2 is adapted to be inserted into the mounting hole 5, to prevent the paddle 2 from shaking during use and the material from penetrating into the mounting hole 5, thereby improving stability and sealing. Then, the positioning shaft 3 is passed through the bottom of the stirring shaft 1 in sequence to penetrate multiple paddles 2 and penetrate into the stirring shaft 1, and then the paddle 2 is clamped on the stirring shaft 1 to prevent it from being separated from the stirring shaft 1 during use. Then, the locking block 4 is connected to the bottom end of the stirring shaft 1 to lock the bottom of the positioning shaft 3. The positioning shaft 3 is abutted to lock the positioning shaft 3 in the stirring shaft 1 to prevent the positioning shaft 3 from falling off under the action of gravity. When the blade 2 needs to be replaced, the locking block 4 is disassembled, and the positioning shaft 3 is then pulled out from the mounting hole 5 of the stirring shaft 1. The corresponding blade 2 can be pulled out from the stirring shaft 1 for replacement. The replacement method is convenient and fast. During maintenance, only the blade 2 needs to be replaced, and there is no need to replace the entire stirring paddle, thereby reducing maintenance costs and improving the overall reliability and service life. The installation method in which the blade 2 is integrally embedded in the stirring shaft 1 has a greater connection strength, further improving the service life.

[0047] Example 2

[0048] As a further improvement to Example 1, Figure 3 , Fig. 9 and Fig.10 As shown, a plurality of blades 2 are staggeredly arranged in the axial direction of the stirring shaft 1 .

[0049] In this embodiment, the plurality of paddles 2 are staggered to improve the stirring performance, so that the paddles 2 can fully stir the liquid.

[0050] Based on the above implementation, in a preferred implementation, Figures 3 to 6As shown, the mounting hole 5 located at the bottom of the stirring shaft 1 is connected to the bottom of the stirring shaft 1 through a slot, and the locking block 4 is arranged in the slot.

[0051] In this embodiment, the locking block 4 is disposed in the slot, and the locking block 4 is limited by the inner side of the slot to improve stability and prevent the locking block 4 from loosening or even falling off during the rotation of the stirring shaft 1.

[0052] Based on the above implementation, in a preferred implementation, Figures 11 to 13 As shown, the blade 2 is penetrated by a positioning hole 6 for the positioning shaft 3 to pass through; a through hole 8 is provided in the stirring shaft 1 along its axial direction, the bottom of the through hole 8 is connected to the bottom of the stirring shaft 1, and the through hole 8 and the positioning hole 6 are coaxially arranged; the diameters of the through hole 8 and the positioning hole 6 are both adapted to the diameter of the positioning shaft 3; the positioning shaft 3 is suitable for being sequentially penetrated into the through hole 8 and multiple positioning holes 6.

[0053] It should be noted that the positioning hole 6 is arranged along the axial direction of the stirring shaft 1 , and the positioning hole 6 is slidably matched with the positioning shaft 3 .

[0054] In this embodiment, a positioning hole 6 is provided on the blade 2 corresponding to the positioning shaft 3, and a through hole 8 is provided coaxially with the positioning hole in the stirring shaft 1. After the blade 2 is inserted into the mounting hole 5, the positioning hole is aligned with the positioning hole 6 on the blade 2. The positioning shaft 3 can pass through multiple positioning holes 6 in sequence from the bottom of the through hole 8 and then be fixed in the through hole 8 by the locking block 4. When the positioning shaft 3 is inserted into the stirring shaft 1, the positioning shaft 3 cooperates with the positioning hole 6 on the blade 2, thereby fixing the blade 2 to prevent the blade 2 from shaking or detaching from the stirring shaft 1 during operation, thereby improving stability.

[0055] Specifically, the through hole 8 is coaxially arranged with the stirring shaft 1, and the positioning hole 6 is arranged in the middle position of the blade 2, so that both ends of the blade 2 extend out of the stirring shaft 1 evenly, thereby improving the uniformity of stirring and maintaining stability during rotation.

[0056] Based on the above implementation, in a preferred implementation, Fig.11 As shown, an annular groove is concavely provided on the blade 2 at the outer periphery of the positioning hole 6, and a sealing ring 7 is provided in the annular groove.

[0057] In this embodiment, a sealing ring 7 is provided on the outer periphery of the positioning hole 6 to improve the sealing performance, thereby preventing the material from penetrating into the positioning hole 6 when the material is stirred, causing pollution and difficulty in cleaning, thereby increasing the service life.

[0058] On the basis of the above-mentioned embodiment, in a preferred embodiment, the surface of the blade 2 is provided with a wear-resistant coating.

[0059] In this embodiment, a wear-resistant coating is provided on the surface of the blade 2 to improve the stirring effect and service life.

[0060] Based on the above embodiments, in a preferred embodiment, the wear-resistant coating is a ceramic coating or a diamond coating.

[0061] In this embodiment, the wear-resistant coating may be a ceramic coating or a diamond coating to improve the stirring effect and service life.

[0062] Based on the above implementation, in a preferred implementation, Figure 2 As shown, the top of the through hole 8 is sealed. By sealing the top of the through hole 8, when the positioning shaft 3 is inserted into the through hole 8, the locking block 4 is matched at the bottom of the through hole 8 to lock the positioning shaft 3 in the through hole 8, and the sealing at both ends improves stability.

[0063] As a convertible implementation method, it can also be, for example Figure 4 As shown, the top of the through hole 8 is connected to the top of the stirring shaft 1, and the top height of the positioning shaft 3 is higher than or equal to the top height of the through hole 8. At this time, the stirring shaft 1 is placed in the vertical direction, and the positioning shaft 3 can be easily taken out from the top of the through hole 8 while ensuring that the positioning shaft 3 fixes the blade 2 under the action of gravity, providing multiple disassembly and installation methods.

[0064] Based on the above implementation, in a preferred implementation, Figure 6 As shown, the top end of the through hole 8 is sealed, and an elastic member 9 is provided in the through hole 8 ; one end of the elastic member 9 abuts against the top of the through hole 8 , and the other end abuts against the positioning shaft 3 .

[0065] In this embodiment, when the positioning shaft 3 is inserted into the through hole 8 , the positioning shaft 3 is firmly in contact with the bottom locking block 4 under the elastic action of the elastic member 9 , thereby improving stability.

[0066] Specifically, the elastic member 9 may be a compression spring.

[0067] Based on the above implementation, in a preferred implementation, Figure 2 , Figure 4 and Figure 6 As shown, a groove 14 is provided at the top of the locking block 4 corresponding to the positioning shaft 3 , and the size of the groove 14 matches the size of the positioning shaft 3 .

[0068] In this embodiment, a groove 14 is provided on the top of the locking block 4 so that when the locking block 4 is connected to the stirring shaft 1 , the bottom end of the positioning shaft 3 falls into the groove 14 , thereby improving stability.

[0069] Based on the above implementation, in a preferred implementation, Figure 6As shown, the locking block 4 is connected to the stirring shaft 1 via a screw 10 .

[0070] In this embodiment, the locking block 4 is connected to the stirring shaft 1 by means of screws 10, which facilitates installation and disassembly.

[0071] Based on the above implementation, in a preferred implementation, Figures 11 to 13 As shown, both ends of the blade 2 extending out of the stirring shaft 1 are stirring parts, and the stirring part is provided with a blade part, and the blade part faces the rotation direction.

[0072] In this embodiment, a blade is provided on the stirring portion of the blade 2 to improve the flowability of the material during stirring and improve the stirring effect.

[0073] Specifically, the blade portion is arranged in a cone shape.

[0074] Based on the above implementation, in a preferred implementation, Figures 1 to 10 As shown, a flange 11 is provided at the top end of the stirring shaft 1 , which is suitable for connecting to an external driving device through the flange 11 .

[0075] It should be noted that the flange has a plurality of connection holes 12 .

[0076] In this embodiment, a flange 11 is provided on the top end of the stirring shaft 1 to improve the connection strength. At the same time, the flange is connected to an external driving device through a connection hole 12 on the flange, which facilitates installation and disassembly.

[0077] Specifically, Figure 6 As shown, a plurality of threaded holes for the screws 10 to pass through are provided on the corresponding locking block 4 on the paddle 2 at the bottom end of the stirring shaft 1. When the locking block 4 is connected to the stirring shaft 1 through the screws 10, it is convenient for the screws 10 to pass through the locking block 4 and the paddle 2 in sequence to be connected to the stirring shaft 1.

[0078] Based on the above implementation, in a preferred implementation, Figures 5 to 9 As shown, a plurality of stirring blocks 13 are provided at the bottom of the paddle 2 located at the bottom of the stirring shaft 1 .

[0079] In this embodiment, by providing a stirring block 13 at the bottom of the bottommost blade 2, the area at the bottom that cannot be stirred can be compensated, thereby expanding the stirring range and improving the stirring effect.

[0080] Specifically, Figure 5 As shown, the number of the stirring blocks 13 is set to two, and the two stirring blocks 13 are symmetrically arranged on the paddle 2 .

[0081] Specifically, the stirring shaft 1 is cylindrical or conical.

[0082] Specifically, the locking block 4 can be made of corrosion-resistant and wear-resistant materials such as stainless steel or alloy steel to increase its service life.

[0083] Specifically, the material of the blade 2 can be selected from corrosion-resistant and wear-resistant materials such as stainless steel or alloy steel to increase the service life.

[0084] Specifically, the material of the positioning shaft 3 can be selected from corrosion-resistant and wear-resistant materials such as stainless steel or alloy steel to increase the service life.

[0085] The installation and working principle of the stirring paddle provided in this embodiment are as follows: when the paddle 2 needs to be installed, the paddle 2 can be first slid into the installation hole 5 so that the positioning hole 6 on the paddle 2 is aligned with the through hole 8, and then the positioning shaft 3 is passed through the bottom of the stirring shaft 1 to successively penetrate multiple paddles 2 and penetrate into the stirring shaft 1, and then the paddle 2 is fixedly clamped on the stirring shaft 1 to prevent it from being separated from the stirring shaft 1 during use, and then the locking block 4 is connected to the groove at the bottom end of the stirring shaft 1 so that the groove 14 on the locking block 4 is aligned with the bottom end of the positioning shaft 3 for clamping, and then multiple screws 10 are passed through the locking block 4 and the threaded holes on the bottommost paddle 2 in turn and threadedly connected to the stirring shaft 1 to firmly lock the positioning shaft 3. Stop in the stirring shaft 1 to prevent the positioning shaft 3 from falling off under the action of gravity, and then connect the stirring shaft 1 to the external driving device through the flange 11, and set it in the mixer, so that the stirring shaft 1 is driven by the driving device to stir the material. When the blade 2 needs to be replaced, the locking block 4 is disassembled, and then the positioning shaft 3 is pulled out from the stirring shaft 1, and the corresponding blade 2 can be pulled out from the stirring shaft 1 for replacement. The replacement method is convenient and fast. When the blade 2 is worn and repaired, only the blade 2 needs to be replaced, and there is no need to replace the entire blade, thereby reducing maintenance costs and improving overall reliability and service life. The installation method of the blade 2 being embedded in the stirring shaft 1 as a whole has a greater connection strength, which further improves the service life. The technical problems of the existing high maintenance cost of the stirring paddle, the cumbersome replacement of the stirring paddle, and the impact on work efficiency are solved.

[0086] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A stirring paddle, characterized in that: include: Agitator shaft (1); A plurality of blades (2) are arranged at intervals along the axial direction of the stirring shaft (1); a mounting hole (5) is provided on the stirring shaft (1) corresponding to each of the blades (2); the blades (2) are adapted to be inserted into the mounting hole (5) along a direction perpendicular to the axial direction of the stirring shaft (1), and the blades (2) are slidably matched with the mounting hole (5); A positioning shaft (3) is slidably arranged in the stirring shaft (1) from the bottom of the stirring shaft (1), and the positioning shaft (3) sequentially penetrates the plurality of blades (2) along the axial direction of the stirring shaft (1), and is suitable for limiting the movement of the blades (2) along the direction perpendicular to the axial direction of the stirring shaft (1); A locking block (4) is detachably connected to the bottom end of the stirring shaft (1) and is suitable for locking the positioning shaft (3) in the stirring shaft (1).

2. The stirring paddle according to claim 1, characterized in that: The plurality of blades (2) are arranged alternately in the axial direction of the stirring shaft (1).

3. The stirring paddle according to claim 1, characterized in that: The mounting hole (5) located at the bottom of the stirring shaft (1) is connected to the bottom of the stirring shaft (1) through a slot, and the locking block (4) is arranged in the slot.

4. The stirring paddle according to claim 1, characterized in that: The paddle (2) is penetrated by a positioning hole (6) for the positioning shaft (3) to pass through; the stirring shaft (1) is provided with a through hole (8) along its axial direction, the bottom of the through hole (8) is connected to the bottom of the stirring shaft (1), and the through hole (8) and the positioning hole (6) are coaxially arranged; the diameters of the through hole (8) and the positioning hole (6) are both adapted to the diameter of the positioning shaft (3); the positioning shaft (3) is suitable for being sequentially penetrated by the through hole (8) and a plurality of the positioning holes (6).

5. The stirring paddle according to claim 4, characterized in that: An annular groove is concavely provided on the blade (2) at the outer periphery of the positioning hole (6), and a sealing ring (7) is provided in the annular groove.

6. The stirring paddle according to claim 4, characterized in that: The top end of the through hole (8) is sealed, and an elastic member (9) is provided in the through hole (8); one end of the elastic member (9) abuts against the top of the through hole (8), and the other end abuts against the positioning shaft (3).

7. The stirring paddle according to claim 1, characterized in that: The surface of the blade (2) is provided with a wear-resistant coating.

8. The stirring paddle according to claim 7, characterized in that: The wear-resistant coating is a ceramic coating or a diamond coating.

9. The stirring paddle according to claim 1, characterized in that: A plurality of stirring blocks (13) are provided at the bottom of the paddle (2) located at the bottom of the stirring shaft (1).

10. The stirring paddle according to any one of claims 1 to 9, characterized in that: A groove (14) is provided at the top of the locking block (4) corresponding to the positioning shaft (3), and the size of the groove (14) is adapted to the size of the positioning shaft (3); And / or, the locking block (4) is connected to the stirring shaft (1) via a screw (10); And / or, both ends of the blade (2) extending out of the stirring shaft (1) are stirring parts, and the stirring part is provided with a blade, and the blade faces the direction of rotation; And / or, a flange (11) is provided at the top end of the stirring shaft (1), which is suitable for being connected to an external driving device through the flange (11).

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