Stirring paddle and reaction kettle

Abstract

The utility model relates to a stirring paddle and a reaction kettle, and relates to the technical field of stirring. The stirring paddle comprises a rotating shaft and at least one stirring assembly, and one end of the rotating shaft is used for being connected with a driver. The stirring assembly comprises a stirring frame and a first stirring blade, the stirring frame is arranged on the rotating shaft and is in a closed frame shape, the stirring frame is provided with a plurality of stirring side faces located on the same plane, and the first stirring blade is connected with the rotating shaft and located in the stirring frame. A first through hole is formed in the stirring frame, and the first through hole penetrates through the stirring frame in the axial direction of the rotating shaft; a second through hole is formed in the first stirring blade and penetrates through the first stirring blade in the axial direction of the rotating shaft. The stirring frame and the first stirring blade of the stirring assembly of the stirring paddle are matched with each other, so that high-viscosity slurry can be fully and uniformly stirred, and the condition that the slurry is adhered to the side wall of the reaction kettle and is gradually gelled is slowed down or avoided.

Description

Technical Field

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

[0002] Polyimide is an aromatic heterocyclic polymer compound with imide groups in its molecular structure, and is one of the polymer materials with the best comprehensive performance. Polyimide has outstanding heat resistance, mechanical properties, low temperature resistance, chemical stability, radiation resistance, dielectric properties, flame retardancy and biocompatibility. Its strong comprehensive performance makes it the top of the pyramid of special engineering plastics, and it is widely used in aerospace, microelectronics and nonlinear optical materials.

[0003] For polymer materials, the longer the molecular chain of the polymer, that is, the larger the molecular weight, the better its performance. Polymer viscosity is a manifestation of the average relative molecular mass of the polymer, that is, the higher the polymer viscosity, the higher the average relative molecular mass of the polymer. Therefore, in order to obtain high-performance polymers, it is very important to prepare a high-viscosity polyimide slurry. Of course, if the viscosity of the prepared slurry is too high, it will put a lot of pressure on the reaction equipment and dilution equipment, and it is also easy to damage the stirring equipment.

[0004] Whether it is a polyimide slurry prepared by a one-step method or an intermediate product polyamic acid prepared by a two-step method, in order to ensure sufficient reaction in the reactor, the materials for preparing polyimide need to be stirred. During the stirring process, the materials are subjected to the centrifugal force and will be thrown on the side wall of the reactor, making it difficult to achieve sufficient stirring. Moreover, when the polyimide slurry is cooled and diluted, the viscosity of the slurry will increase during the cooling process, which will cause the slurry to stick to the side wall of the reactor and gradually gel. Therefore, the traditional stirring paddle has the problem of insufficient and uneven stirring. Utility Model Content

[0005] Based on this, it is necessary to provide a stirring paddle to address the problems of insufficient and uneven stirring of traditional stirring paddles.

[0006] A stirring paddle, comprising:

[0007] A rotating shaft, one end of which is used to connect to a driver; and

[0008] at least one stirring assembly, the stirring assembly comprising a stirring frame and a first stirring blade, the stirring frame being arranged on the rotating shaft and being arranged in a closed frame shape and having a plurality of stirring side surfaces located on the same plane, the first stirring blade being connected to the rotating shaft and being located in the stirring frame;

[0009] The stirring frame is provided with a first through hole, which penetrates the stirring frame along the axial direction of the rotating shaft; the first stirring blade is provided with a second through hole, which penetrates the first stirring blade along the axial direction of the rotating shaft.

[0010] In one embodiment, the stirring frame includes two first frame sides arranged opposite to each other and two second frame sides arranged opposite to each other; the rotating shaft connects the two first frame sides and is located between the two ends of the first frame sides, and the first stirring blade is located between the two first frame sides.

[0011] In one embodiment, the thickness of the stirring frame is L1, and the thickness of the first stirring blade is L2, wherein 0.8≤L1 / L2≤1.

[0012] In one embodiment, the first stirring blade includes a first sub-stirring blade and a second sub-stirring blade, the first sub-stirring blade and the second sub-stirring blade are arranged opposite to each other along the radial direction of the rotating shaft, and both can be detachably connected to the rotating shaft.

[0013] In one embodiment, a mounting hole is provided on the rotating shaft; the first sub-stirring blade includes a first connecting portion, and the second sub-stirring blade includes a second connecting portion, the first sub-stirring blade and the second sub-stirring blade are both inserted into the mounting hole and connected to each other, and the first connecting portion and the second connecting portion are detachably connected.

[0014] In one embodiment, the first stirring blade includes a first sub-stirring blade and a second sub-stirring blade which are arranged opposite to each other along the radial direction of the rotating shaft; relative to the stirring side surface, the first sub-stirring blade and the second sub-stirring blade are both arranged in a wave shape.

[0015] In one of the embodiments, at least two of the stirring components are staggered in the circumferential direction of the rotating shaft; or, at least two of the stirring components are spaced apart in the axial direction of the rotating shaft.

[0016] In one embodiment, the stirring paddle further includes: a second stirring blade, the second stirring blade is connected to the other end of the rotating shaft, and the second stirring blade is an anchor blade.

[0017] A reaction kettle comprises a reaction vessel, a driver and the stirring paddle as described above, wherein the stirring paddle is arranged in the reaction vessel, and the driver is arranged outside the reaction vessel and connected to the stirring paddle to drive the stirring paddle to rotate.

[0018] The above-mentioned stirring paddle is provided with at least one stirring component on the rotating shaft, and the stirring component includes a stirring frame and a first stirring blade located in the stirring frame. When stirring high-viscosity materials (such as high-viscosity polyimide slurry), the multiple stirring side surfaces of the stirring frame increase the lateral sweeping area of ​​stirring, and can stir the material laterally over a large area, and sweep the slurry adhered to the side wall of the reaction container, thereby improving the stirring efficiency; the first stirring blade assists the stirring frame to enhance the stirring effect of the middle part of the stirring frame; therefore, the stirring frame and the first stirring blade of the stirring component cooperate with each other, so that the stirring paddle can fully and evenly stir the high-viscosity slurry, and slow down or avoid the situation where the slurry adheres to the side wall of the reactor and gradually gels.

[0019] Furthermore, by arranging a second stirring blade at the other end of the rotating shaft, the second stirring blade can fully stir the bottom slurry, thereby improving the material exchange efficiency between the upper and lower layers in the reaction container, and alleviating or avoiding the phenomena of incomplete convection between the upper and bottom, wall adhesion and bottom sticking caused by failure to stir the bottom slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a front view of a reaction kettle in one embodiment of the present application.

[0021] Figure 2 for Figure 1 A top view of the rotating shaft and stirring assembly of the stirring paddle of the reactor.

[0022] Figure 3 for Figure 2 A top view of the rotating shaft of the stirring paddle and the first stirring blade.

[0023] Figure 4 for Figure 3 A cross-sectional view of the connection between the central rotating shaft and the first stirring blade.

[0024] Figure 5 for Figure 1 Another top view of the rotating shaft and stirring assembly of the stirring paddle of the reactor.

[0025] Figure 6 for Figure 5 Another top view of the rotating shaft of the stirring paddle and the first stirring blade.

[0026] Figure 7 for Figure 1 Schematic diagram of the partial structure of the second stirring blade of the stirring paddle of the reactor.

[0027] Description of reference numerals:

[0028] 100, reactor; 110, reaction vessel; 120, stirring paddle; 122, rotating shaft; 124, stirring assembly; 126, second stirring blade; 128, mounting hole; 130, driver; 132, coupling;

[0029] 140, stirring frame; 142, stirring side; 144, first frame edge; 146, second frame edge; 148, first through hole;

[0030] 150, first stirring blade; 151, first sub-stirring blade; 152, second sub-stirring blade; 153, first connecting portion; 154, second connecting portion; 155, second through hole; 156, first edge; 157, second edge. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application 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 present application. However, the present application 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 present application, so the present application is not limited by the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that if 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", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply 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 a limitation on the present application.

[0033] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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 this application can be understood according to the specific circumstances.

[0035] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the 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. The first feature being "below", "below" and "below" the 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.

[0036] It should be noted that if 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. If 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. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0037] See also Figure 1 , Figure 1 The front view of a reactor in one embodiment of the present application is shown. The reactor 100 provided in one embodiment of the present application includes a reaction vessel 110, a stirring paddle 120 and a driver 130. The stirring paddle 120 is disposed in the reaction vessel 110. The driver 130 is disposed outside the reaction vessel 110 and connected to one end of the stirring paddle 120, and is used to drive the stirring paddle 120 to rotate, so that the stirring paddle 120 can stir the materials in the reaction vessel 110 to achieve uniform mixing between different materials.

[0038] It should be noted that chemical reactions can occur between different materials placed in the reaction vessel 110, that is, during the stirring process of the stirring paddle 120, chemical reactions continuously occur between different materials, which can fully combine the materials and prepare more products. However, chemical reactions may not occur between different materials placed in the reaction vessel 110, and the stirring paddle 120 can evenly mix different materials in the reaction vessel 110. In this sense, the reactor 100 can be regarded as a stirring device. The driver 130 can be but is not limited to a motor, and the drive shaft of the driver 130 is connected to one end of the stirring paddle 120 through a coupling 132, and the torque is transmitted to the stirring paddle 120. Among them, the coupling 132 can be replaced by a transmission mechanism, such as a pulley transmission mechanism or a gear transmission mechanism.

[0039] In this embodiment, the stirring paddle 120 includes a rotating shaft 122 and at least one stirring assembly 124. One end of the rotating shaft 122 is connected to the driving shaft of the driver 130 through a coupling 132. The stirring assembly 124 includes a stirring frame 140 and a first stirring blade 150. The stirring frame 140 is arranged on the rotating shaft 122 and is arranged in a closed frame shape, and has a plurality of stirring side surfaces 142 located in the same plane. The first stirring blade 150 is connected to the rotating shaft 122 and is located in the stirring frame 140.

[0040] At least one stirring assembly 124 is provided on the rotating shaft 122, and the stirring assembly 124 includes a stirring frame 140 and a first stirring blade 150 located in the stirring frame 140. When stirring a high-viscosity material (such as a high-viscosity polyimide slurry), the multiple stirring side surfaces 142 of the stirring frame 140 increase the lateral sweeping area of ​​stirring, and can stir the material laterally over a large area, and sweep the slurry adhered to the side wall of the reaction vessel 110, thereby improving the stirring efficiency; the first stirring blade 150 assists the stirring frame 140 to enhance the stirring effect of the middle part of the stirring frame 140; therefore, the stirring frame 140 and the first stirring blade 150 of the stirring assembly 124 cooperate with each other, so that the stirring paddle 120 can fully and evenly stir the high-viscosity slurry, thereby slowing down or avoiding the situation where the slurry adheres to the side wall of the reactor 100 and gradually gels.

[0041] In view of the situation that the bottom slurry cannot be stirred due to the presence of a certain distance between the stirring device and the bottom of the reactor in the traditional technology, especially in industrial production, the large-scale reaction equipment and dilution equipment have large volumes and deep interiors, and it is easy to have phenomena such as incomplete convection between the top and the bottom, wall hanging and sticking to the bottom, which will reduce the product yield. In this regard, in the present embodiment, the stirring paddle 120 also includes a second stirring blade 126, which is connected to the other end of the rotating shaft 122 and arranged at the bottom of the corresponding reaction vessel 110, wherein all stirring components 124 are located between one end of the rotating shaft 122 and the second stirring blade 126. The second stirring blade 126 can fully stir the bottom slurry, improve the material exchange efficiency between the upper and lower layers in the reaction vessel 110, and slow down or avoid the phenomena such as incomplete convection between the top and the bottom, wall hanging and sticking to the bottom caused by the inability to stir the bottom slurry.

[0042] In this embodiment, at least two stirring components 124 are provided on the rotating shaft 122, and at least two stirring components 124 are arranged at intervals along the axial direction of the rotating shaft 122, so that more materials can be stirred transversely in the axial direction, which can be suitable for a reaction vessel 110 with a deeper depth. Moreover, multiple stirring components 124 stir at the same time, so that the materials can be stirred more evenly and fully. It should be noted that the arrangement of multiple stirring components 124 is not limited to the interval distribution in the axial direction. In other embodiments, at least two stirring components 124 can be staggered along the circumference of the rotating shaft 122, and provide a greater transverse stirring force on the same shaft section, so as to better shear the materials and stir the materials more evenly and fully. For example, two stirring components 124 can be evenly spaced along the circumference of the rotating shaft 122 to form a 90-degree angle; three stirring components 124 can be evenly spaced along the circumference of the rotating shaft 122 to form a 60-degree angle between two adjacent stirring components 124; or, four stirring components 124 can be evenly spaced along the circumference of the rotating shaft 122 to form a 45-degree angle between two adjacent stirring components 124.

[0043] In this embodiment, the number of stirring components 124 can be but is not limited to two, that is, two stirring components 124 are spaced apart in the axial direction of the rotating shaft 122. Among them, the shortest distance between two adjacent stirring frames 140 is H1, and the shortest distance between the stirring frame 140 and the second stirring blade 126 is H2, wherein 0.95≤H1 / H2≤1.05, and the stirring structures at different axial positions are arranged as a whole, so that different stirring structures can cooperate with each other, and all materials in the reaction vessel 110 can be stirred more fully and evenly. Among them, H1 can be equal to H2. It can be understood that in other embodiments, one stirring component 124, three axially distributed stirring components 124 or more axially distributed stirring components 124 can be set on the rotating shaft 122, which can be determined according to the depth of the reaction vessel 110, that is, the deeper the depth of the reaction vessel 110, the more the number of stirring components 124.

[0044] Furthermore, the stirring frame 140 includes two first frame edges 144 and two second frame edges 146 that are arranged opposite to each other. The rotating shaft 122 connects the two first frame edges 144 and is located between the two ends of the first frame edges 144, and the first stirring blade 150 is located between the two first frame edges 144. Since the two first frame edges 144 are arranged opposite to each other and the two second frame edges 146 are arranged opposite to each other, the stirring frame 140 has a simple structure, is easy to process and manufacture, and has a low production cost; and can provide the stirring side surface 142 as large as possible, thereby increasing the swept area during stirring, thereby improving the stirring efficiency; the first stirring blade 150 located between the two first frame edges 144 can effectively stir the viscous solution between the stirring frames 140 to achieve the purpose of sufficient stirring.

[0045] Furthermore, in the radial direction of the rotating shaft 122 , the end of the first stirring blade 150 is spaced apart from the two second frame edges 146 , thereby avoiding the connection between the first stirring blade 150 and the stirring frame 140 , so that the first stirring blade 150 has a certain degree of mobility.

[0046] In this embodiment, the stirring frame 140 is in the shape of a square frame, and the length of the first frame edge 144 is greater than the length of the second frame edge 146. Moreover, the stirring frame 140 is divided into two symmetrically arranged halves with the central axis of the rotating shaft 122 as the symmetry center. The two sides of the symmetrically arranged stirring frame 140 can be evenly stressed to avoid affecting the stirring effect due to uneven stress during high-speed rotation. It can be understood that in other embodiments, the stirring frame 140 is not limited to a square shape, wherein the two first frame edges 144 or the two second frame edges 146 can be arc-shaped, semicircular, trapezoidal or other shapes; or, the stirring frame 140 as a whole can be pentagonal, hexagonal or other polygonal shapes.

[0047] In the present embodiment, the stirring frame 140 is a metal frame, and the structural strength is improved to fully stir the high-viscosity slurry. In order to install the stirring frame 140, two sockets (not shown) are provided on the rotating shaft 122, and the two ends of one half of the stirring frame 140 are inserted into the two sockets from one side, and the two ends of the other half of the stirring frame 140 are inserted into the two sockets from the other side, and the stirring frame 140 is docked, and the stirring frame 140 is fixed to the rotating shaft 122 by welding. It should be noted that in other embodiments, the thickness of the stirring frame 140 is greater than the diameter of the rotating shaft 122, and the rotating shaft 122 is penetrated in the two first frame edges 144 of the stirring frame 140, and the two first frame edges 144 are fixedly connected by welding.

[0048] See also Figure 2 and Figure 3 , Figure 2 FIG. 1 shows a top view of the rotating shaft and stirring assembly of the stirring paddle of the reactor in this embodiment. Figure 3 Shows Figure 2 The top view of the rotating shaft of the stirring paddle and the first stirring blade, the thickness of the stirring frame 140 is L1, and the thickness of the first stirring blade 150 is L2, wherein 0.8≤L1 / L2≤1. When the thickness of the first stirring blade 150 is greater than the thickness of the stirring frame 140, the structural strength of the first stirring blade 150 can be improved, thereby increasing the shear force of the first stirring blade 150 on the high-viscosity material.

[0049] In this embodiment, the first stirring blade 150 includes a first stirring blade 151 and a second stirring blade 152, which are arranged opposite to each other along the radial direction of the rotating shaft 122 and can be detachably connected to the rotating shaft 122. The first stirring blade 151 and the second stirring blade 152 are detachably arranged, and the first stirring blade 150 of different materials or structures can be replaced according to solutions of different viscosities to improve the stirring efficiency of the stirring paddle 120; moreover, the stirring blade 120 can be disassembled and cleaned separately, and the assembly of the stirring paddle 120 in the reaction container 110 can also be achieved in steps, which is convenient for assembly.

[0050] In order to adapt to the rotation of the stirring paddle 120, the first stirring blade 151 and the second stirring blade 152 are both arranged in a wave shape relative to the stirring side surface 142. In other words, the first stirring blade 151 and the second stirring blade 152 both have a first edge 156 and a second edge 157 relative to each other, and the projections of the first edge 156 and the second edge 157 on the bottom of the reaction vessel 110 are in a wave shape, thereby reducing the resistance during rotation, and according to the centrifugal principle, the outermost slurry is subjected to a greater centrifugal force, and the wavy first stirring blade 150 can strengthen the friction connection between the blade and the slurry, thereby preventing the slurry from being forced to fly out and stick to the inner wall of the reaction vessel 110, thereby reducing the slurry sticking to the inner wall of the reaction vessel 110, and further optimizing the problem of sticking to the side wall of the reactor 100.

[0051] See also Figure 4 , Figure 4 A cross-sectional view of the connection between the rotating shaft and the first stirring blade of the stirring paddle of the reactor in this embodiment is shown, and a mounting hole 128 is provided on the rotating shaft 122. The first stirring blade 151 includes a first connecting portion 153, and the second stirring blade 152 includes a second connecting portion 154. The first stirring blade 151 and the second stirring blade 152 are both inserted into the mounting hole 128 and connected to each other. The first connecting portion 153 and the second connecting portion 154 are detachably connected, thereby simplifying the assembly of the first stirring blade 151 and the second stirring blade 152 on the rotating shaft 122.

[0052] In this embodiment, the end of the first connection part 153 is provided with a protruding structure, and the second connection part 154 is provided with a slot structure. The protruding structure and the slot structure are plugged and matched, and are tightly connected to achieve the detachable matching of the first connection part 153 and the second connection part 154. Obviously, the detachable and washable connection structure between the first connection part 153 and the second connection part 154 is not limited to the above structure, and a snap-on structure or other structures can also be used. Moreover, the first sub-stirring blade 151 and the second sub-stirring blade 152 are both made of metal, and have good structural strength.

[0053] See also Figure 5 and Figure 6 , Figure 5 Another top view of the rotating shaft and stirring assembly of the stirring paddle of the reactor in this embodiment is shown. Figure 6 Shows Figure 5 Another top view of the rotating shaft and the first stirring blade of the stirring paddle, a first through hole 148 is provided on the stirring frame 140, and the first through hole 148 penetrates the stirring frame 140 along the axial direction of the rotating shaft 122, that is, the first through hole 148 that penetrates axially is provided on both first frames 144. A second through hole 155 is provided on the first stirring blade 150, and the second through hole 155 penetrates the first stirring blade 150 along the axial direction of the rotating shaft 122, that is, the first sub-stirring blade 151 and the second sub-stirring blade 152 are provided with a second through hole 155 that penetrates axially. The provision of the first through hole 148 and the second through hole 155 facilitates cleaning. When cleaning the stirring paddle 120, by improving the fluidity of the cleaning liquid, it is possible to prevent the residual cleaning liquid or material from causing the stirring frame 140 and the first stirring blade 150 to rust.

[0054] See also Figure 7 , combined with Figure 1 , Figure 7The schematic diagram of the partial structure of the second stirring blade of the stirring paddle of the reactor in this embodiment is shown. The second stirring blade 126 is an anchor blade. The second stirring blade 126 has a side facing away from the stirring frame 140. The side is arc-shaped. The curvature of the side is adapted to the curvature of the bottom of the reaction vessel 110, so as to better adapt to the bottom of the reaction vessel 110 and fully stir the materials at the bottom. It should be noted that in other embodiments, the arc-shaped side of the second stirring blade 126 can be set on the first frame 144 of the stirring frame 140, and the first frame 144 is set corresponding to the bottom of the reaction vessel 110, and replaces the second stirring blade 126.

[0055] In this embodiment, the second stirring blade 126 includes but is not limited to two blades, and the specific number of the blades can be set according to actual needs.

[0056] 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.

[0057] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A stirring paddle, characterized in that: include: A rotating shaft, one end of which is used to connect to a driver; and at least one stirring assembly, the stirring assembly comprising a stirring frame and a first stirring blade, the stirring frame being arranged on the rotating shaft and being arranged in a closed frame shape and having a plurality of stirring side surfaces located on the same plane, the first stirring blade being connected to the rotating shaft and being located in the stirring frame; The stirring frame is provided with a first through hole, and the first through hole penetrates the stirring frame along the axial direction of the rotating shaft; The first stirring blade is provided with a second through hole, and the second through hole penetrates the first stirring blade along the axial direction of the rotating shaft.

2. The stirring paddle according to claim 1, characterized in that: The stirring frame includes two first frame edges arranged opposite to each other and two second frame edges arranged opposite to each other; The rotating shaft connects the two first frame edges and is located between two ends of the first frame edges, and the first stirring blade is located between the two first frame edges.

3. The stirring paddle according to claim 1, characterized in that: The thickness of the stirring frame is L1, and the thickness of the first stirring blade is L2, wherein 0.8≤L1 / L2≤1.

4. The stirring paddle according to claim 1, characterized in that: The first stirring blade includes a first sub-stirring blade and a second sub-stirring blade. The first sub-stirring blade and the second sub-stirring blade are arranged opposite to each other along the radial direction of the rotating shaft, and both can be detachably connected to the rotating shaft.

5. The stirring paddle according to claim 4, characterized in that: The rotating shaft is provided with a mounting hole; The first sub-stirring blade includes a first connecting portion, and the second sub-stirring blade includes a second connecting portion. The first sub-stirring blade and the second sub-stirring blade are both inserted into the mounting hole and docked with each other, and the first connecting portion is detachably connected to the second connecting portion.

6. The stirring paddle according to claim 1, characterized in that: The first stirring blade comprises a first sub-stirring blade and a second sub-stirring blade which are arranged opposite to each other along the radial direction of the rotating shaft; Relative to the stirring side surface, the first stirring blade and the second stirring blade are both arranged in a wave shape.

7. The stirring blade according to any one of claims 1 to 6, characterized in that: In the circumferential direction of the rotating shaft, at least two stirring components are staggered with each other; or, In the axial direction of the rotating shaft, at least two stirring components are spaced apart from each other.

8. The stirring blade according to any one of claims 1 to 6, characterized in that: Also includes: The second stirring blade is connected to the other end of the rotating shaft, and the second stirring blade is an anchor blade.

9. A reaction kettle, characterized in that: It comprises a reaction container, a driver and a stirring paddle as claimed in any one of claims 1 to 8, wherein the stirring paddle is arranged in the reaction container, and the driver is arranged outside the reaction container and connected to the stirring paddle to drive the stirring paddle to rotate.

Images