A mixing device

Abstract

This invention provides a mixing device, comprising: a barrel and at least three mixing shafts. The mixing shafts are arranged side-by-side within the barrel and rotatably connected to both ends of the barrel. Adjacent mixing shafts mesh with each other. A gap is provided between the mixing shafts and the inner wall of the barrel to prevent friction between the mixing shafts and the inner wall of the barrel during rotation. This embodiment increases the number of meshing points without changing the length of the mixing shafts, thereby improving the mixing efficiency and overcoming the limitations of solutions that only change the length of the mixing shafts to alter the mixing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of material mixing technology, and in particular to a mixing device. Background Technology

[0002] Currently, mixing devices use single or double mixing shafts. To improve the mixing effect, the mixing shaft can only be lengthened. However, if the mixing shaft is too long, it will come into contact with the mixing chamber due to its own weight, causing friction and potentially introducing foreign matter that affects product quality. Utility Model Content

[0003] This utility model discloses a mixing device to solve the problem that the above-mentioned method of improving the mixing effect by lengthening the screw mixing shaft can easily cause friction between the screw mixing shaft and the cavity, resulting in frictional foreign matter that affects product quality.

[0004] This utility model provides a mixing device, including: a barrel and at least three mixing shafts. The mixing shafts are arranged in parallel inside the barrel and rotatably connected to both ends of the barrel. Adjacent mixing shafts mesh with each other. A gap is provided between the mixing shafts and the inner wall of the barrel to avoid friction between the mixing shafts and the inner wall of the barrel when they rotate.

[0005] Furthermore, support assemblies are provided at both ends of the mixing shaft, and the support assemblies are located on the outside of the barrel.

[0006] Furthermore, the cross-section of the hybrid shaft is an axisymmetric curve that is wide in the middle and narrow at both ends, and the distance between the lines connecting the two ends is greater than the distance between the lines connecting the two sides in the middle. The cross-sectional profile of the hybrid shaft includes two short arcs and two long arcs connected in sequence. The two short arcs are distributed at both ends of the cross-section of the hybrid shaft, and the two long arcs are distributed on both sides of the cross-section of the hybrid shaft. In two adjacent hybrid shafts, the short arc of one hybrid shaft meshes with the long arc of the other hybrid shaft.

[0007] Furthermore, the barrel includes multiple sub-cylinders, which are arranged side by side and connected sequentially. The number of sub-cylinders is equal to the number of mixing shafts. One mixing shaft is located in one sub-cylinder, and a mixing path is formed between the inner wall of the sub-cylinder and the edge of the mixing shaft.

[0008] Furthermore, the sub-tube has a circular cylindrical structure.

[0009] Furthermore, the short arc of the mixing shaft is parallel to the arc surface of the inner wall of the sub-cylinder.

[0010] Furthermore, the mixing shafts all rotate in the same direction, and two adjacent mixing shafts continuously mesh; or the mixing shafts all rotate in the opposite direction to their adjacent mixing shafts, and two adjacent mixing shafts mesh periodically.

[0011] Furthermore, among two adjacent mixing shafts, the left mixing shaft rotates clockwise and the right mixing shaft rotates counterclockwise, creating a convergence region with a width that gradually decreases from top to bottom and / or a diffusion region with a width that gradually increases from top to bottom between the two mixing shafts.

[0012] Furthermore, the first mixing shaft on the left rotates clockwise, and each subsequent mixing shaft rotates in the opposite direction to the preceding mixing shaft.

[0013] Furthermore, all of the aforementioned hybrid shafts are connected to a power source device via a transmission structure.

[0014] As can be seen from the technical solution, the embodiments provided by this utility model have the following advantages:

[0015] This embodiment forms a material mixing zone through the meshing point between two adjacent mixing shafts. The gap and rotation between the two shafts generate shear force on the material at the meshing point, promoting mixing. Compared to a mixing shaft count of 2, this embodiment has 3 or more mixing shafts and 2 or more meshing points, resulting in 2 or more mixing zones generating shear force. Compared to a mixing shaft count of 2, without changing the shaft length, the mixing efficiency is improved by having 2 or more meshing points, overcoming the limitation of simply changing the shaft length to alter mixing efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of a mixing device structure provided in an embodiment of this utility model;

[0018] Figure 2 A schematic diagram of the working state of the mixing components rotating in the same direction in a mixing device provided by an embodiment of this utility model. Figure 1 ;

[0019] Figure 3 A schematic diagram of the working state of the mixing components rotating in the same direction in a mixing device provided by an embodiment of this utility model. Figure 2 ;

[0020] Figure 4A schematic diagram of the working state of the mixing components rotating in the same direction in a mixing device provided by an embodiment of this utility model. Figure 3 ;

[0021] Figure 5 A schematic diagram of the working state of the mixing components rotating in the same direction in a mixing device provided by an embodiment of this utility model. Figure 4 ;

[0022] Figure 6 A schematic diagram of the working state of the mixing components rotating in the same direction in a mixing device provided by an embodiment of this utility model. Figure 5 ;

[0023] Figure 7 A schematic diagram of the reverse rotation of the mixing component in a mixing device provided in this embodiment of the present invention. Figure 1 ;

[0024] Figure 8 A schematic diagram of the reverse rotation of the mixing component in a mixing device provided in this embodiment of the present invention. Figure 2 ;

[0025] Figure 9 A schematic diagram of the reverse rotation of the mixing component in a mixing device provided in this embodiment of the present invention. Figure 3 ;

[0026] Figure 10 A schematic diagram of the reverse rotation of the mixing component in a mixing device provided in this embodiment of the present invention. Figure 4 ;

[0027] Figure 11 A schematic diagram of the reverse rotation of the mixing component in a mixing device provided in this embodiment of the present invention. Figure 5 ;

[0028] Explanation of reference numerals in the attached drawings: 1. Power source equipment; 2. Transmission structure; 3. Barrel; 4. Mixing shaft; 7. Support assembly; 71. Front support component; 72. Rear support component; 8. Shearing zone; 9. Extrusion zone. Detailed Implementation

[0029] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0033] like Figure 1 As shown, this utility model embodiment discloses a mixing device.

[0034] This utility model provides a mixing device, including: a barrel 3 and at least three mixing shafts 4. The multiple mixing shafts 4 are arranged in parallel inside the barrel 3 and are rotatably connected to both ends of the barrel 3. Adjacent mixing shafts 4 mesh with each other. A gap is provided between the mixing shafts 4 and the inner wall of the barrel 3 to avoid friction between the mixing shafts 4 and the inner wall of the barrel 3 when they rotate.

[0035] Understandably, in specific implementation, on the one hand, the number of mixing shafts 4 in this embodiment is greater than or equal to 3. The first mixing shaft meshes with the second mixing shaft to form the first meshing mixing zone, the second mixing shaft meshes with the third mixing shaft to form the second meshing mixing zone, and the nth mixing shaft meshes with the (n+1)th mixing shaft to form the nth meshing mixing zone. With the same length, the more shafts there are, the more meshing mixing zones there are, and the better the material mixing effect, where n is an integer greater than 0. Therefore, in this embodiment, the material mixing zone is formed through the meshing point between two adjacent mixing shafts 4. The gap and rotation between two adjacent mixing shafts 4 generate shear force on the material at the meshing point, and the shear force promotes the mixing of the material. Compared to a mixing shaft number of 2, this embodiment has 3 or more mixing shafts 4, resulting in 2 or more engagement points. This means there are 2 or more mixing zones that exert shear force on the material. Compared to a mixing shaft number of 2, without changing the length of the mixing shafts 4, the mixing efficiency is improved by having 2 or more engagement points, overcoming the limitation of simply changing the length of the mixing shafts 4 to change the mixing efficiency. Therefore, this embodiment, by setting three or more parallel mixing shafts 4, forms multiple engagement point regions. Increasing the number of engagement points improves the mixing efficiency, avoiding the risk of friction between the mixing shafts 4 and the inner wall of the barrel 3 due to excessive weight during operation, which is a risk associated with increasing mixing efficiency by lengthening the mixing shafts 4. Furthermore, maintaining a gap between the mixing shafts 4 and the barrel 3 prevents friction debris from being generated during rotation, thus avoiding material contamination.

[0036] In a more specific embodiment, support assemblies 7 are provided at both ends of the mixing shaft 4, and the support assemblies 7 are located on the outside of the barrel 3. Figure 1 As shown, the support component 7 includes a front support 71 and a rear support 72.

[0037] Understandably, in practice, in addition to the connection and support of the mixing shaft 4 at both ends of the barrel 3, additional support components 7 are set at both ends of the mixing shaft 4 to improve the support stability of the mixing shaft 4 and further avoid friction between the mixing shaft 4 and the inner wall of the barrel 3.

[0038] In a more specific embodiment, the cross-section of the hybrid shaft 4 is an axisymmetric curve that is wide in the middle and narrow at both ends, and the distance between the lines connecting the two ends is greater than the distance between the lines connecting the two sides in the middle. The cross-sectional profile of the hybrid shaft 4 includes two short arcs and two long arcs connected in sequence. The two short arcs are distributed at both ends of the cross-section of the hybrid shaft 4, and the two long arcs are distributed on both sides of the cross-section of the hybrid shaft 4. In two adjacent hybrid shafts 4, the short arc of one hybrid shaft 4 meshes with the long arc of the other hybrid shaft 4.

[0039] Understandably, in practice, by varying the width at both ends and the width in the middle of the mixing shaft 4, and by engaging the short and long arcs, the shape and area of ​​the meshing zone of the mixing shaft 4 will continuously change during rotation. When the material passes through the meshing zone, the flow direction of the material will continuously change, experiencing different degrees of compression and stretching. The material will be continuously diverted and merged, allowing different material components to better contact and mix with each other, thereby improving the uniformity of mixing.

[0040] In a more specific embodiment, the barrel 3 includes a plurality of sub-cylinders arranged side by side and connected in sequence. The number of sub-cylinders is equal to that of the mixing shaft 4. One mixing shaft 4 is located inside one sub-cylinder, and a mixing path is formed between the inner wall of the sub-cylinder and the edge of the mixing shaft 4.

[0041] Understandably, in practice, multiple sub-cylinders are arranged side-by-side, each equipped with a mixing shaft 4. These mixing shafts 4 simultaneously perform mixing operations within their respective sub-cylinders. Compared to a design where multiple mixing shafts 4 are concentrated in a single large cylinder, this method creates a more complex material mixing path. Each independent sub-cylinder has its own independent mixing path between its inner wall and the edge of the mixing shaft 4, allowing the material to be more evenly distributed and mixed within each sub-cylinder, thus improving the uniformity of the mixing.

[0042] In a more specific embodiment, the inner wall of the sub-cylinder is a circular cylinder, and the center of the mixing shaft coincides with the center of the circular cylinder.

[0043] Understandably, in practice, the use of circular sub-cylinders ensures that the material moves relatively smoothly within the cylinder, facilitating uniform mixing and conveying of the material.

[0044] In a more specific embodiment, the short arc of the mixing shaft 4 is parallel to the arc surface of the inner wall of the sub-cylinder.

[0045] Understandably, in practice, by keeping the short arc surface parallel to the inner wall of the sub-cylinder, the short arc end of the mixing shaft 4 maintains an equidistant gap with the inner wall of the sub-cylinder, avoiding friction between the mixing shaft 4 and the inner wall of the sub-cylinder. At the same time, this ensures that the force exerted on the material by the mixing shaft 4 at various positions within different sub-cylinders is relatively uniform. This uniform flow force state is conducive to fully mixing materials of different components, avoiding local material accumulation or insufficient mixing caused by uneven gaps.

[0046] It should be noted that when the mixing shaft 4 rotates, the material will be subjected to strong shear force in the area between the mixing shaft 4 and the inner wall of the barrel 3, where the two mixing shafts 4 mesh. The specific working principle is as follows:

[0047] The principle behind the shear force exerted on the material between the mixing unit of the mixing shaft 4 and the inner wall of the barrel 3 is as follows: The mixing shaft 4 rotates inside the barrel 3, and there is relative motion between the mixing unit of the mixing shaft 4 and the inner wall of the barrel 3. When the mixing shaft rotates, the material is trapped between the mixing shaft 4 and the inner wall of the barrel 3. As the mixing shaft 4 rotates, due to the circumferential motion of the mixing shaft 4, the material is continuously stretched and compressed between the mixing shaft 4 and the inner wall of the barrel 3. This stretching and compression process is the shearing action, and the material is subjected to shear force within the narrow gap space between the mixing shaft 4 and the inner wall of the barrel 3.

[0048] In a more specific embodiment, the rotation directions of the mixing shafts 4 are all the same, and two adjacent mixing shafts 4 are continuously meshed, or the rotation directions of the mixing shafts 4 are all opposite to the rotation directions of their adjacent mixing shafts 4, and two adjacent mixing shafts 4 are periodically meshed.

[0049] It should be noted that when the mixing shaft 4 rotates, the material will be subjected to strong shear force in the meshing area of ​​the two mixing shafts 4. The specific working principle is as follows:

[0050] The principle behind the shear force exerted on the material by the meshing area of ​​the two mixing shafts 4 is as follows: the gap between the meshing area of ​​the two mixing shafts 4 is very small. When the material passes through this gap, it is as if it is "clamped" between two moving surfaces. As the mixing shafts 4 rotate, the material is rapidly stretched and compressed within this narrow gap. This stretching and compression action causes the molecular chains of the mixture to be stretched and broken, and the original macromolecular structure is destroyed, thereby achieving shear mixing of the material.

[0051] In this embodiment, the cross-section of the mixing shaft 4 is approximately elliptical. When the mixing shaft 4 rotates, due to the axial symmetry of the ellipse, the change in the position of the major and minor axes, and the different curvatures of the major and minor arcs, the meshing parts and meshing conditions of two adjacent mixing shafts 4 will change.

[0052] Figures 2-6 A schematic diagram of the meshing state during the rotation of multiple hybrid shafts 4 in the same direction: Figure 2 In the initial state of the mixing shaft 4, the middle part of the long arc of the mixing shaft 4 meshes with the middle part of the short arc of the adjacent mixing shaft 4, forming a shear zone 8 at the meshing point; Figure 3 The state after all the mixing shafts 4 have rotated 15° clockwise from the initial state is that the long arc of the mixing shaft 4 meshes with the short arc of its adjacent mixing shaft 4, and the meshing part moves from the middle of the long arc to the adjacent connected short arc, forming a shear zone 8 at the meshing point. Figure 4 The state after all the mixing shafts 4 have rotated 30° clockwise from the initial state is that the long arc of the mixing shaft 4 meshes with the short arc of its adjacent mixing shaft 4, and the meshing part turns from the middle of the long arc to the short arc connected to it, forming a shear zone 8 at the meshing point. Figure 5The state after all the mixing shafts 4 have rotated 60° clockwise from their initial state is such that the long arc of the mixing shaft 4 meshes with the short arc of its adjacent mixing shaft 4. The mixing shaft 4 that was originally meshed at the long arc becomes the one whose short arc meshes with the long arc of its adjacent mixing shaft 4, and the mixing shaft 4 that was originally meshed at the short arc becomes the one whose long arc meshes with the short arc of its adjacent mixing shaft 4, forming a shear zone 8 at the meshing point. Figure 6 This is the state after all the mixing shafts 4 have rotated 90° clockwise from their initial state. The mixing shafts 4 that were originally engaged at the middle of the long arc now engage at the middle of the long arc of their adjacent mixing shafts 4, and vice versa. A shear zone 8 is formed at the engagement point. Subsequent clockwise rotations repeat this process. Figures 2-6 The process of change. Therefore, during the rotation of multiple mixing shafts 4 in the same direction, adjacent mixing shafts 4 maintain a meshing state in the inter-shaft region.

[0053] like Figures 7-11 A schematic diagram showing the meshing state of multiple mixing shafts 4 and their adjacent mixing shafts 4 during reverse rotation: Figure 7 In the initial state of the mixing shaft 4, the middle part of the long arc of the mixing shaft 4 meshes with the middle part of the short arc of the adjacent mixing shaft 4, forming a shear zone 8 at the meshing point; Figure 8 The state after the mixing shaft 4 is rotated 15° in the opposite direction from the initial state to the adjacent mixing shaft 4 is that the short arc end of the mixing shaft 4 meshes with the middle of the long arc of the adjacent mixing shaft 4, forming a shear zone 8 at the meshing point; Figure 9 The state after the mixing shaft 4 is rotated 30° in the opposite direction from the initial state to the adjacent mixing shaft 4 is that the short arc of the mixing shaft 4 is separated from the long arc of the adjacent mixing shaft 4, and a compression zone 9 with a constantly changing gap width is formed between the mixing shaft 4 and the adjacent mixing shaft 4. Figure 10 The state after the mixing shaft 4 is rotated 60° in the opposite direction from the initial state to the adjacent mixing shaft 4 is that the short arc of the mixing shaft 4 is separated from the long arc of the adjacent mixing shaft 4, and a compression zone 9 with a constantly changing gap width is formed between the mixing shaft 4 and the adjacent mixing shaft 4. Figure 11 The state of the mixing shaft 4 after rotating 90° in the opposite direction from its initial state to that of its adjacent mixing shaft 4 is as follows: the mixing shaft 4 that was originally engaged at the middle of the long arc becomes engaged at the middle of the long arc of its short arc with the middle of the long arc of its adjacent mixing shaft 4, and the mixing shaft 4 that was originally engaged at the middle of the short arc becomes engaged at the middle of the short arc of its long arc with the middle of the short arc of its adjacent mixing shaft 4, forming a shear zone 8 at the engagement point. Therefore, during the process of multiple mixing shafts 4 rotating in the opposite direction to their adjacent mixing shafts 4, the adjacent mixing shafts 4 engage within a specific angle in the inter-shaft region, and remain in a non-engaging state within the remaining angles, thus achieving periodic engagement.

[0054] It should be noted that the methods for designing the ratio of the major and minor axes of the mixing shaft 4, as well as the curvature design methods for the short and long arcs, involved in achieving meshing when the mixing shaft 4 rotates in the same direction and periodically meshing when it rotates in opposite directions, are existing technologies. The major axis refers to the straight-line distance between the midpoints of the short arcs at both ends of the cross-section of the mixing shaft 4, and the minor axis refers to the straight-line distance between the midpoints of the long arcs on both sides of the cross-section of the mixing shaft 4.

[0055] It should be noted that for materials requiring strong shear force (such as silicone sealant, lithium battery slurry, etc.), in the operating mode where the mixing shaft 4 rotates in the same direction, it is possible to achieve the following throughout the material mixing process: Figures 2-6 As shown, the two adjacent mixing shafts 4 continuously mesh in adjacent areas, providing a stable and continuous shear force to the material. Through this continuous shear force, the materials can be more fully mixed and blended, thereby significantly improving the mixing uniformity of the materials, meeting the high standards required by the production process for material mixing effect, and is suitable for the production of materials with high-intensity mixing requirements;

[0056] For materials that do not require strong shear forces (such as high-temperature vulcanized rubber compounds), due to their unique physical or chemical properties, their structure is relatively fragile and they do not require continuous strong shear forces. In the operating mode where the mixing shaft 4 rotates in the opposite direction, such as... Figure 7 , Figure 8 and Figure 11 As shown, the short and long arcs of adjacent mixing shafts 4 mesh to provide shear force to the material, promoting mixing. Figure 9 and Figure 10 As shown, the short and long arcs of adjacent mixing shafts 4 disengage and do not mesh, creating a gap between the mixing shafts 4. During this period, based on the characteristic that the surface of the mixing shaft 4 is curved, the distance between adjacent mixing shafts 4 will continuously change, exerting a squeezing effect on the material. However, since there is no meshing point between adjacent mixing shafts 4, the shearing effect of the mixing shafts 4 on the material is reduced, achieving an intermittent meshing mixing mode, which is suitable for materials with low-intensity mixing requirements.

[0057] In a more specific embodiment, among two adjacent mixing shafts 4, the left mixing shaft 4 rotates clockwise and the right mixing shaft 4 rotates counterclockwise, and a convergence region with a width that gradually decreases from top to bottom is generated between the two mixing shafts 4, and / or a diffusion region with a width that gradually increases from top to bottom is generated.

[0058] Understandably, in practice, by rotating the left mixing shaft 4 clockwise and the right mixing shaft 4 counterclockwise, a convergence region with a width that gradually decreases from top to bottom is generated between adjacent mixing shafts 4, such as... Figures 7-9As shown, the material's own gravity enhances the extrusion mixing effect in the convergence zone. Simultaneously, the mixing shafts 4 remain engaged during this process, thus the material is subjected to both shear and extrusion forces within the convergence zone, effectively improving the mixing effect. Furthermore, as... Figure 10 As shown, when the mixing shaft 4 transitions from the meshing cycle to the non-meshing cycle, the area between the mixing shaft 4 will transition from the convergence zone to the diffusion zone where the width between the shafts gradually increases from top to bottom. The material transitions from the convergence zone to the diffusion zone. After being subjected to the combined action of shear force and extrusion force, it can be released in the diffusion zone, avoiding the material from being blocked in the convergence zone and avoiding the relatively fragile material from being subjected to continuous strong shear force and extrusion force.

[0059] In a more specific embodiment, the first mixing shaft on the left rotates clockwise, and each subsequent mixing shaft rotates in the opposite direction to the preceding mixing shaft.

[0060] When the number of mixing axes 4 is greater than or equal to 3 and is even, the first mixing axis 4 rotates clockwise, and each subsequent mixing axis 4 rotates in the opposite direction to the adjacent mixing axis 4.

[0061] Understandably, in practice, the first mixing axis on the left rotates clockwise, the second mixing axis rotates counterclockwise, the third mixing axis rotates clockwise, the fourth mixing axis rotates counterclockwise, and so on. When the number of mixing axes 4 is even, the convergence region that gradually decreases from top to bottom accounts for a large proportion among multiple adjacent mixing axes 4, ensuring the best mixing effect of the mixing component.

[0062] In a more specific embodiment, multiple hybrid shafts are connected to a power source device via a transmission structure.

[0063] Understandably, in practice, by connecting these hybrid shafts 4 to a power source device 1 and using a suitable transmission mechanism, the speed and phase of each shaft can be precisely controlled so that they move synchronously according to predetermined requirements.

[0064] In a more specific embodiment, the transmission structure 2 employs a gear transmission assembly.

[0065] Understandably, in practical implementation, using a gear transmission assembly as the transmission structure 2 results in high transmission efficiency and accurate transmission ratio.

[0066] It should be noted that the terms used to describe positional relationships in the above examples and accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. The various embodiments of this utility model described above are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A mixing device, characterized in that, include: The machine barrel (3) and at least three mixing shafts (4) are arranged side by side inside the machine barrel (3) and rotatably connected to both ends of the machine barrel (3). Adjacent mixing shafts (4) mesh with each other. A gap is provided between the mixing shafts (4) and the inner wall of the machine barrel (3) to avoid friction between the mixing shafts (4) and the inner wall of the machine barrel (3) when they rotate.

2. The mixing device according to claim 1, characterized in that, The mixing shaft (4) is provided with support components (7) at both ends, and the support components (7) are located on the outside of the barrel (3).

3. The mixing device according to claim 1, characterized in that, The cross section of the hybrid shaft (4) is an axisymmetric curve that is wide in the middle and narrow at both ends, and the distance between the two ends is greater than the distance between the two sides in the middle. The cross section profile of the hybrid shaft (4) includes two short arcs and two long arcs connected in sequence. The two short arcs are distributed at both ends of the cross section of the hybrid shaft (4), and the two long arcs are distributed on both sides of the cross section of the hybrid shaft (4). In two adjacent hybrid shafts (4), the short arc of one hybrid shaft (4) meshes with the long arc of the other hybrid shaft (4).

4. A mixing device according to claim 3, characterized in that, The barrel (3) includes multiple sub-cylinders, which are arranged side by side and connected in sequence. The number of sub-cylinders is equal to the number of mixing shafts (4). One mixing shaft (4) is located in one of the sub-cylinders, and a mixing path is formed between the inner wall of the sub-cylinder and the edge of the mixing shaft (4).

5. A mixing device according to claim 4, characterized in that, The sub-tube has a circular cylindrical structure.

6. A mixing device according to claim 5, characterized in that, The short arc of the mixing shaft (4) is parallel to the arc surface of the inner wall of the sub-cylinder.

7. A mixing device according to claim 3, characterized in that, The rotation directions of the mixing shafts (4) are all the same, and two adjacent mixing shafts (4) are continuously meshed; or the rotation directions of the mixing shafts (4) are all opposite to the rotation directions of their adjacent mixing shafts (4), and two adjacent mixing shafts (4) are periodically meshed.

8. A mixing device according to claim 3, characterized in that, In the two adjacent mixing shafts (4), the left mixing shaft (4) rotates clockwise and the right mixing shaft (4) rotates counterclockwise, and a convergence region with a width that gradually decreases from top to bottom and / or a diffusion region with a width that gradually increases from top to bottom is generated between the two mixing shafts (4).

9. A mixing device according to claim 8, characterized in that, The first mixing shaft (4) on the left rotates clockwise, and each subsequent mixing shaft (4) rotates in the opposite direction to the adjacent mixing shaft (4).

10. A mixing device according to claim 1, characterized in that, The multiple hybrid shafts (4) are all connected to a power source device (1) via a transmission structure (2).

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