Dynamic mixing device

Abstract

The application provides a dynamic mixing device, and belongs to the technical field of industrial mixing devices. The shell comprises an axial outer wall and a radial outer wall, the radial outer wall is fixedly connected to the axial outer wall through the edge thereof, the inside of the axial outer wall and the radial outer wall forms a first containing space, the mandrel passes through the axial outer wall, the mandrel can rotate in the first containing space relative to the shell, the blade is fixedly connected to the mandrel, and the blade can rotate along with the rotation of the mandrel; one end of the first feeding pipe is fixedly connected to a first point position of the shell, so that the first containing space can be communicated with the outside through the first feeding pipe; one end of the discharging pipe is fixedly connected to a second point position of the shell, so that the first containing space can be communicated with the outside through the discharging pipe; and the sealing device is arranged at the connection position of the mandrel and the end cover of the shell. The device can increase the stretching effect on the mixed materials, the stretching flow field has better dispersion effect and higher efficiency compared with the shearing flow field, and therefore has good dispersion mixing effect.

Description

Technical Field

[0001] This invention relates to the field of industrial mixing equipment technology, and in particular to a dynamic mixing device. Background Technology

[0002] Adding various additives and modifiers to polymer raw materials is a common method to improve and modify the properties of polymer materials. Fractional mixing of these additives within the raw material matrix is ​​an essential step in polymer processing. The effectiveness of dispersion and mixing largely determines the final performance of the material and its application range. Therefore, melt blending equipment has received widespread attention and application. Different products have different mixing requirements, leading to the development of various types of mixers. Based on the motion state of the mixing elements, they can be divided into two main categories: static mixers and dynamic mixers. Static mixers have no moving elements; they rely on the fluid's own energy and the structure of stationary elements to change the flow state of the fluid within the equipment. Because the internal elements are stationary, their shear capacity is weak and difficult to adjust, limiting their application in polymer blending. Dynamic mixers rely on mechanical power elements to force the fluid to mix, achieving better uniform mixing of main materials and auxiliary materials. Summary of the Invention

[0003] In view of this, the present invention provides a dynamic mixing device that can increase the stretching effect on the materials to be mixed. The stretching flow field has a better dispersion effect and higher efficiency than the shear flow field, thus having a good dispersion and mixing effect, and is therefore more suitable for practical use.

[0004] To achieve the first objective mentioned above, the technical solution of the dynamic mixing device provided by the present invention is as follows:

[0005] The dynamic mixing device provided by the present invention includes a housing (5), a spindle (7), a first feed pipe (1), a discharge pipe (3), and blades (11).

[0006] The housing (5) includes an axial outer wall and a radial outer wall. The radial outer wall is fixedly connected to the axial outer wall through its edge, such that the interiors of the axial outer wall and the radial outer wall form a first accommodating space.

[0007] The mandrel (7) passes through the axial outer wall, such that when the mandrel (7) is able to rotate relative to the housing (5) within the first accommodating space,

[0008] The blade (11) is fixedly connected to the spindle (7), so that the blade (11) can rotate with the spindle (7);

[0009] One end of the first feed pipe (1) is fixedly connected to the first point of the housing (5), so that the first accommodating space can communicate with the outside through the first feed pipe (1);

[0010] One end of the discharge pipe (3) is fixedly connected to the second point of the housing (5), so that the first accommodating space can communicate with the outside through the discharge pipe (3);

[0011] The sealing device is located at the connection between the mandrel (7) and the end cap of the housing (5).

[0012] The dynamic mixing device provided by the present invention can also be further implemented using the following technical measures.

[0013] Preferably, the dynamic mixing device further includes a jacket (6), which is fixedly connected to the outer periphery of the housing (5), so that a second accommodating space is formed between the jacket (6) and the housing (5).

[0014] Preferably, the blade (11) includes a first type of blade (11a) and a second type of blade (11b).

[0015] The outer side of the second type of blade (11b) has a first gap with the inner wall of the shell (5), the value of which ranges from 0.5mm to 12mm.

[0016] The ratio of the first type of leaf (11a) to the second type of leaf (11b) is ≤1 / 2.

[0017] As a preferred option

[0018] The first type of blade (11a) is selected from a helical blade or a straight blade. The angle β between the first type of blade (11a) and the axial direction of the mandrel (7) ranges from 0° to 45°. The radial angle α of the first type of blade (11a) in the radial section of the mandrel (7) ranges from 2° to 60°.

[0019] The second type of blade (11b) is selected from a helical blade or a straight blade. The circumferential inclination angle θ between the second type of blade (11b) and the mandrel (7) ranges from 0° to 45°. The radial inclination angle γ of the second type of blade (11b) in the radial section of the mandrel (7) ranges from 2° to 60°.

[0020] Preferably, the first type of blade (11a) and the second type of blade (11b) are staggered along the circumference of the mandrel (7).

[0021] Preferably, the dynamic mixing device further includes a plurality of first radial rods (12) and first axial rods (13).

[0022] The first type of radial rod (12) is fixedly connected to the mandrel (7) radially, and the first type of radial rod (12) is evenly distributed circumferentially on the mandrel (7).

[0023] Each of the first type of radial rod (12) is fixedly connected with a plurality of the first type of axial rods (13).

[0024] Preferably, the dynamic mixing device further includes a plurality of second radial rods (14) and a second axial rod (15).

[0025] The second type of radial rod (14) is fixedly connected to the inner wall of the housing (5) along the radial direction of the mandrel (7), and the second type of radial rod (14) is arranged in the circumferential direction of the inner wall of the housing (5);

[0026] Each of the second type of radial rod (14) is fixedly connected with a plurality of the second type of axial rods (15);

[0027] The second type of radial rod (14) is spaced apart from the first type of radial rod (12).

[0028] As a preferred option

[0029] The gap between the first type of axial rod (13) and the second type of axial rod (15) is 0.2mm-20mm;

[0030] The first axial rod (13) connected to the outermost part of the first radial rod (13) has a gap of 1mm-20mm between it and the inner wall of the housing (5) in the axial direction;

[0031] The second axial rod (15), which is connected to the innermost side of the second radial rod (14), has a gap of 1mm-20mm between itself and the mandrel (7) in the axial direction.

[0032] Preferably, the dynamic mixing device further includes a second feed pipe (2).

[0033] One end of the second feed pipe (2) is fixedly connected to three points of the housing (5), so that the first accommodating space can communicate with the outside through the second feed pipe (2).

[0034] Preferably, the dynamic mixing device further includes a frame (4), a bearing housing, and a bearing (8).

[0035] The housing (5) and the bearing seat are fixedly connected to the frame (4).

[0036] The bearing (8) is disposed between the mandrel (7) and the bearing housing.

[0037] In application, the dynamic mixing device provided by this invention inputs the material to be mixed into a first accommodating space formed by a fixed connection of an axial outer wall and a radial outer wall through a first feed pipe 1. Within the first accommodating space, the material to be mixed comes into contact with and repeatedly rubs against the blades 11, thus achieving mixing. In this embodiment, the first feed pipe 1 is located at the first axial end of the housing 5, and the discharge pipe 3 is located on the radial outer wall at the other axial end of the housing 5. Therefore, if the material to be mixed needs to be discharged from the first accommodating space, it needs to traverse the entire axial path of the first accommodating space. Thus, the travel distance of the material to be mixed within the first accommodating space is relatively long, thereby ensuring sufficient mixing of the material. Furthermore, the housing 5 of the dynamic mixing device provided by this embodiment can be expanded axially and radially according to the required volume of the material to be mixed, thus adapting to the mixing of large-capacity industrial-grade materials.

[0038] Compared with existing dynamic mixing devices, the dynamic mixing device provided by the present invention slightly reduces the shearing effect on the materials to be mixed, but significantly increases the stretching effect on the materials to be mixed. The stretching flow field has a better dispersion effect and higher efficiency than the shearing flow field. Therefore, the dynamic mixing device provided by the embodiments of the present invention has a good dispersion and mixing effect. Thus, a single dynamic mixing device provided by the embodiments of the present invention can significantly improve the mixing effect of the materials to be mixed. Therefore, the resistance of the materials to be mixed in the dynamic mixing device provided by the embodiments of the present invention can be significantly reduced.

[0039] In existing dynamic mixing devices, the gap between rotating and stationary elements is very small, resulting in strong axial and circumferential shear mixing effects. Radial mixing relies on pressure difference and a very small radial space, which significantly increases pressure loss. The dynamic mixing device provided in this invention, through the arrangement of blades 11, can effectively improve the radial mixing effect and compensate for some of the pressure loss from material flow, thus minimizing the system's pressure loss.

[0040] Furthermore, in the dynamic mixing device provided in this embodiment of the invention, the spindle 7 is a cantilever structure or a dual-point support at the front and rear, and there is a sealing device at the connection between the spindle 7 and the end cover of the housing 5. In this case, it can be avoided that when the materials to be mixed are mixed in the first accommodating space, the materials to be mixed enter between the spindle 7 and the end cover of the housing 5, which would cause the dynamic mixing device provided in this embodiment of the invention to have difficulty operating. Attached Figure Description

[0041] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0042] Appendix Figure 1 This is a typical structural schematic diagram of the dynamic mixing device provided in an embodiment of the present invention;

[0043] Appendix Figure 2 For the appendix Figure 1 A schematic diagram of the AA-direction cross-section structure;

[0044] Appendix Figure 3 For the appendix Figure 1 Schematic diagram of the BB-direction cross-section structure;

[0045] Appendix Figure 4 A schematic diagram of the connection structure between the housing of the dynamic mixing device provided in an embodiment of the present invention and the second type of radial rod and the second type of axial rod;

[0046] Appendix Figure 5 A schematic diagram of the connection structure between the mandrel and the first radial rod and the first axial rod of the dynamic mixing device provided in an embodiment of the present invention;

[0047] Appendix Figure 6 For the appendix Figure 1 A magnified view of part C in the middle;

[0048] Appendix Figure 7 For the appendix Figure 3 A magnified view of part D in the middle;

[0049] Explanation of reference numerals in the attached figures:

[0050] 1-First feed pipe, 2-Second feed pipe, 3-Discharge pipe, 4-Frame, 5-Housing, 6-Jacket, 7-Mandrel, 8-Bearing, 11-Blade, 11a-First type of blade, 11b-Second type of blade, 12-First type of radial rod, 13-First type of axial rod, 14-Second type of radial rod, 15-Second type of axial rod. Detailed Implementation

[0051] In view of this, the present invention provides a dynamic mixing device that can increase the stretching effect on the material. The stretching flow field has a better dispersion effect and higher efficiency than the shear flow field, thus having a good dispersion and mixing effect, and is therefore more suitable for practical use.

[0052] Through arduous and persistent efforts, the inventor discovered that

[0053] Dynamic mixers widely used in melt blending processes include screw extruders, planetary gear dynamic mixers, ball-and-socket dynamic mixers, crescent-groove dynamic mixers, and dynamic-stationary gear ring dynamic mixers. These mixers have strong shearing action on high-viscosity fluids and combine functions such as diversion, stripping, extrusion, and kneading, making them widely used in the chemical fiber, plastics, and rubber industries. To achieve the desired dispersion and mixing effect, most dynamic mixers primarily employ enhanced shearing, which presents some drawbacks: firstly, the strong shearing and kneading may damage the structure of polymer materials; secondly, strong shearing often requires very small gaps between dynamic and static components, resulting in a small cross-sectional area of ​​the fluid flow channel, significantly increasing pressure loss and making it difficult to adapt to high-flow-rate conditions.

[0054] To further illustrate the technical means and effects adopted by the present invention to achieve its intended purpose, the following detailed description, in conjunction with the accompanying drawings and preferred embodiments, provides a detailed explanation of the specific implementation, structure, features, and effects of a dynamic mixing device according to the present invention. In the following description, different "embodiments" or "embodiments" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0055] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships, such as A and / or B. Specifically, it can mean that A and B can be included at the same time, A can exist alone, or B can exist alone, and any of the above three situations can be met.

[0056] See appendix Figure 1 -Appendix Figure 7 The dynamic mixing device provided in this embodiment of the invention includes a housing 5, a spindle 7, a first feed pipe 1, a discharge pipe 3, and blades 11. The housing 5 includes an axial outer wall and a radial outer wall. The radial outer wall is fixedly connected to the axial outer wall via its edge, forming a first accommodating space within the axial and radial outer walls. The spindle 7 passes through the axial outer wall, allowing it to rotate relative to the housing 5 within the first accommodating space. The blades 11 are fixedly connected to the spindle 7, allowing them to rotate with the spindle 7. One end of the first feed pipe 1 is fixedly connected to a first point on the housing 5, enabling the first accommodating space to communicate with the outside through the first feed pipe 1. One end of the discharge pipe 3 is fixedly connected to a second point on the housing 5, enabling the first accommodating space to communicate with the outside through the discharge pipe 3. A sealing device is provided at the connection between the spindle 7 and the end cap of the housing 5.

[0057] In application, the dynamic mixing device provided in this embodiment of the invention inputs the material to be mixed into a first accommodating space formed by a fixed connection of an axial outer wall and a radial outer wall through a first feed pipe 1. Within the first accommodating space, the material to be mixed comes into contact with and repeatedly rubs against the blades 11, thus achieving mixing. In this embodiment, the first feed pipe 1 is located at the first axial end of the housing 5, and the discharge pipe 3 is located on the radial outer wall at the other axial end of the housing 5. Therefore, if the material to be mixed needs to be discharged from the first accommodating space, it needs to traverse the entire axial path of the first accommodating space. Thus, the travel distance of the material to be mixed within the first accommodating space is relatively long, thereby ensuring sufficient mixing of the material. Furthermore, the housing 5 of the dynamic mixing device provided in this embodiment of the invention can be expanded axially and radially according to the required volume of the material to be mixed, thus adapting to the mixing of large-capacity industrial-grade materials.

[0058] Compared with existing dynamic mixing devices, the dynamic mixing device provided by the present invention slightly reduces the shearing effect on the materials to be mixed, but significantly increases the stretching effect on the materials to be mixed. The stretching flow field has a better dispersion effect and higher efficiency than the shearing flow field. Therefore, the dynamic mixing device provided by the embodiments of the present invention has a good dispersion and mixing effect. Thus, a single dynamic mixing device provided by the embodiments of the present invention can significantly improve the mixing effect of the materials to be mixed. Therefore, the resistance of the materials to be mixed in the dynamic mixing device provided by the embodiments of the present invention can be significantly reduced.

[0059] In existing dynamic mixing devices, the gap between rotating and stationary elements is very small, resulting in strong axial and circumferential shear mixing effects. Radial mixing relies on pressure difference and a very small radial space, which significantly increases pressure loss. The dynamic mixing device provided in this invention, through the arrangement of blades 11, can effectively improve the radial mixing effect and compensate for some of the pressure loss from material flow, thus minimizing the system's pressure loss.

[0060] Furthermore, in the dynamic mixing device provided in this embodiment of the invention, the spindle 7 is a cantilever structure or a dual-point support at the front and rear, and there is a sealing device at the connection between the spindle 7 and the end cover of the housing 5. In this case, it can be avoided that when the materials to be mixed are mixed in the first accommodating space, the materials to be mixed enter between the spindle 7 and the end cover of the housing 5, which would cause the dynamic mixing device provided in this embodiment of the invention to have difficulty operating.

[0061] The dynamic mixing device provided in this embodiment of the invention further includes a jacket 6, which is fixedly connected to the outer periphery of the housing 5, forming a second accommodating space between the jacket 6 and the housing 5. In this case, to ensure constant-temperature mixing of the materials to be mixed within the first accommodating space, the second accommodating space can be set to a vacuum or ultra-vacuum state, thereby preventing heat loss or heat increase. To ensure that the materials to be mixed within the first accommodating space can also be heated, a heating medium can be introduced into the second accommodating space. To ensure that the materials to be mixed within the first accommodating space can also be cooled, a cooling medium can be introduced into the second accommodating space. Therefore, the addition of the jacket 6 enables the dynamic mixing device provided by this invention to have wider applicability.

[0062] In this embodiment of the invention, the blade 11 includes a first type of blade 11a and a second type of blade 11b. A first gap exists between the outer side of the second type of blade 11b and the inner wall of the housing 5, the first gap ranging from 0.5mm to 12mm. The ratio of the first type of blade 11a to the second type of blade 11b is ≤1 / 2. See attached diagram. Figure 2 In this configuration, the first blade 11a causes the material to be mixed near the outer surface of the spindle 7 to move radially toward the inner wall of the housing 5; the second blade 11b causes the material to be mixed near the inner wall of the housing 5 to move radially toward the spindle 7. The combination of the first blade 11a and the second blade 11b not only promotes the axial flow of the material to be mixed but also facilitates radial mixing. Through the first blade 11a and the second blade 11b, the material to be mixed can achieve diversion, convergence, shearing, and stretching actions, thus providing high mixing sufficiency. In existing dynamic mixers, the gap between the rotating and stationary elements is very small, resulting in strong axial and circumferential shearing mixing effects. Radial mixing relies on pressure difference and a small radial space, which significantly increases pressure loss. The arrangement of the second blade 11b and the first blade 11a in the dynamic mixing device provided in this embodiment effectively improves the radial mixing effect and compensates for some of the pressure loss in the flow of the material to be mixed, minimizing the pressure loss of the dynamic mixing device provided in this embodiment.

[0063] In this embodiment of the invention, the first blade 11a is selected from a helical blade or a straight blade. The angle β between the first blade 11a and the axial direction of the mandrel 7 ranges from 0° to 45°, and the radial angle α of the first blade 11a in the radial section of the mandrel 7 ranges from 2° to 60°. The second blade 11b is selected from a helical blade or a straight blade. The angle θ between the second blade 11b and the circumferential direction of the mandrel 7 ranges from 0° to 45°, and the radial angle γ of the second blade 11b in the radial section of the mandrel 7 ranges from 2° to 60°. In this case, adjusting the axial pushing force of the blades on the material to be mixed by adjusting the axial tilt angle β between the first blade 11a and the spindle 7, and the circumferential tilt angle θ between the second blade 11b and the spindle 7, can change the axial pushing force of the blades on the material to be mixed. Adjusting the radial tilt angle α of the first blade 11a in the radial section of the spindle 7, and the radial tilt angle γ of the second blade 11b in the radial section of the spindle 7, can change the radial mixing force of the first blade 11a on the material to be mixed. Therefore, by applying the dynamic mixing device provided in this embodiment of the invention, by adjusting the axial pushing force and the radial mixing force on the material to be mixed by adjusting the axial tilt angle β between the first blade 11a and the spindle 7, the circumferential tilt angle θ between the second blade 11b and the spindle 7, the radial tilt angle α of the first blade 11a in the radial section of the spindle 7, and the radial tilt angle γ of the second blade 11b in the radial section of the spindle 7, it is possible to simultaneously adjust the axial pushing force and the radial mixing force on the material to be mixed, thus enabling the mixing of the material to be mixed to achieve the set target.

[0064] In this configuration, the first type of blade 11a and the second type of blade 11b are staggered along the circumference of the mandrel 7. This arrangement of the first type of blade 11a and the second type of blade 11b provides more space for the material to be mixed, allowing the material to better perform actions such as diversion, convergence, shearing, and stretching within this space.

[0065] The dynamic mixing device provided in this embodiment of the invention further includes a plurality of first radial rods 12 and first axial rods 13. The first radial rods 12 are fixedly connected to the spindle 7 radially, and are evenly distributed circumferentially on the spindle 7. Each first radial rod 12 is fixedly connected to a plurality of first axial rods 13. In this configuration, the first radial rods 12 and first axial rods 13 provide more opportunities for contact between the material to be mixed within the first accommodating space and the first radial rods 12 and first axial rods 13, thereby enabling more thorough mixing of the material and achieving a more complete mixture.

[0066] The dynamic mixing device provided in this embodiment of the invention further includes multiple second-type radial rods 14 and second-type axial rods 15. The second-type radial rods 14 are fixedly connected to the inner wall of the housing 5 radially along the spindle 7, and are arranged circumferentially on the inner wall of the housing 5. Multiple second-type axial rods 15 are fixedly connected to each second-type radial rod 14. The second-type radial rods 14 are spaced apart from the first-type radial rods 12. In this configuration, the dynamic mixing device provided in this embodiment of the invention can utilize the first-type radial rod 12, the first-type axial rod 13, the second-type radial rod 14, and the second-type axial rod 15. The first-type radial rod 12 and the first-type axial rod 13 form a rotary kneading assembly; the second-type radial rod 14 and the second-type axial rod 15 form a fixed kneading assembly. The rotary kneading assembly and the fixed kneading assembly cooperate to form a mixing kneading assembly, with a fixed kneading assembly between every two sets of rotary kneading assemblies. In normal operation, each set of rotary kneading components and fixed kneading components knead each other, continuously diverting, converging, shearing, and stretching the mixture. After the mixture passes through the kneading action of one set of mixing kneading components, it enters the next set of mixing kneading components to continue mixing, achieving the purpose of dispersion mixing and thus achieving more thorough mixing. The rotary kneading component consists of 2-36 first-type radial rods 12. Each rotary radial rod 12 is perpendicular to the surface of the mandrel 7 and is evenly distributed on the same cross-section of the mandrel 7. Each first-type radial rod 12 has multiple first-type axial rods 13 evenly distributed on it. The centerline of the first-type axial rod 13 is perpendicular to the first-type radial rod 12 and parallel to the centerline of the mandrel 7. Each first-type axial rod 13 is symmetrically distributed on both sides of the first-type radial rod 12. The fixed pinch assembly consists of a second type of radial rod 14 and a second type of axial rod 15. The fixed pinch assembly comprises 2-36 second type of radial rods 14, each perpendicular to the inner surface of the housing 5 and evenly distributed on the same cross-section of the housing 5. Multiple second type of axial rods 15 are evenly distributed on each of the second type of radial rods 14. The centerline of each second type of axial rod 15 is perpendicular to the second type of radial rod 14 and parallel to the centerline of the mandrel 7. Each second type of axial rod 15 is symmetrically distributed on both sides of the second type of radial rod 14. The cross-sectional shapes of the first type of radial rod 12, the first type of axial rod 13, the second type of radial rod 14, and the second type of axial rod 15 are one or more of the following shapes: circular, rhomboid, trapezoidal, square, etc. The cross-sectional shape of the first type of radial rod 12, the first type of axial rod 13, the second type of radial rod 14, and the second type of axial rod 15 is circular. Furthermore, the first type of radial rod 12, the first type of axial rod 13, the second type of radial rod 14, and the second type of axial rod 15 occupy less space, allowing for an increase in the cross-sectional area of ​​the flow channel for the mixed materials. This is consistent with Bernoulli's equation in fluid mechanics: p + ρgh + ρv 2 / 2 = constant (where p - fluid pressure, ρ - fluid density, v - fluid velocity). Therefore, the flow rate of the material to be mixed is reduced, which significantly reduces the pressure loss of the fluid to be mixed on the one hand, and significantly improves the mixing capacity of a single dynamic mixing device provided in this embodiment of the invention on the other hand. Therefore, the resistance of the material to be mixed in the dynamic mixing device provided in this embodiment of the invention can be significantly reduced.

[0067] The gap between the first type of axial rod 13 and the second type of axial rod 15 is 0.2mm-20mm. The gap between the first type of axial rod 13, which is connected to the outermost side of the first type of radial rod 13, and the inner wall of the housing 5 is 1mm-20mm. The gap between the second type of axial rod 15, which is connected to the innermost side of the second type of radial rod 14, and the mandrel 7 is 1mm-20mm. In this configuration, the materials to be mixed can be kneaded by the mixing and kneading components to achieve more thorough mixing.

[0068] The dynamic mixing device provided in this embodiment of the invention further includes a second feed pipe 2. One end of the second feed pipe 2 is fixedly connected to three points on the housing 5, allowing the first accommodating space to communicate with the outside through the second feed pipe 2. In this case, the materials to be mixed can also be input into the first accommodating space of the housing 5 through the second feed pipe 2, thus achieving higher feeding and mixing efficiency.

[0069] The dynamic mixing device provided in this embodiment of the invention further includes a frame 4, a bearing housing, and a bearing 8. The housing 5 and the bearing housing are fixedly connected to the frame 4, and the bearing 8 is disposed between the spindle 7 and the bearing housing. In this configuration, the frame 4, bearing housing, and bearing 8 reduce wear caused by friction when the spindle 7 is rotated by the rotating power source, thereby improving the service life of the dynamic mixing device provided in this embodiment of the invention.

[0070] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0071] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A dynamic mixing device, characterized in that, Includes a housing (5), a mandrel (7), a sealing device, a first feed pipe (1), a discharge pipe (3), and blades (11). The housing (5) includes an axial outer wall and a radial outer wall. The radial outer wall is fixedly connected to the axial outer wall through its edge, such that the interiors of the axial outer wall and the radial outer wall form a first accommodating space. The mandrel (7) passes through the axial outer wall, such that when the mandrel (7) is able to rotate relative to the housing (5) within the first accommodating space, The blade (11) is fixedly connected to the spindle (7), so that the blade (11) can rotate with the spindle (7); One end of the first feed pipe (1) is fixedly connected to the first point of the housing (5), so that the first accommodating space can communicate with the outside through the first feed pipe (1); One end of the discharge pipe (3) is fixedly connected to the second point of the housing (5), so that the first accommodating space can communicate with the outside through the discharge pipe (3); The sealing device is located at the connection between the mandrel (7) and the end cap of the housing (5).

2. The dynamic mixing device according to claim 1, characterized in that, It also includes a sleeve (6), which is fixedly connected to the outer periphery of the housing (5), so that a second accommodating space is formed between the sleeve (6) and the housing (5).

3. The dynamic mixing device according to claim 1, characterized in that, The blade (11) includes a first type of blade (11a) and a second type of blade (11b). The outer side of the second type of blade (11b) has a first gap with the inner wall of the shell (5), the value of which ranges from 0.5mm to 12mm. The ratio of the first type of leaf (11a) to the second type of leaf (11b) is ≤1 / 2.

4. The dynamic mixing device according to claim 3, characterized in that, The first type of blade (11a) is selected from a helical blade or a straight blade. The angle β between the first type of blade (11a) and the axial direction of the mandrel (7) ranges from 0° to 45°. The radial angle α of the first type of blade (11a) in the radial section of the mandrel (7) ranges from 2° to 60°. The second type of blade (11b) is selected from a helical blade or a straight blade. The circumferential inclination angle θ between the second type of blade (11b) and the mandrel (7) ranges from 0° to 45°. The radial inclination angle γ of the second type of blade (11b) in the radial section of the mandrel (7) ranges from 2° to 60°.

5. The dynamic mixing device according to claim 3, characterized in that, The first type of blade (11a) and the second type of blade (11b) are staggered along the circumference of the mandrel (7).

6. The dynamic mixing device according to claim 1, characterized in that, It also includes multiple first-type radial rods (12) and first-type axial rods (13). The first type of radial rod (12) is fixedly connected to the mandrel (7) radially, and the first type of radial rod (12) is evenly distributed circumferentially on the mandrel (7). Each of the first type of radial rod (12) is fixedly connected with a plurality of the first type of axial rods (13).

7. The dynamic mixing device according to claim 6, characterized in that, It also includes multiple second-type radial rods (14) and second-type axial rods (15). The second type of radial rod (14) is fixedly connected to the inner wall of the housing (5) along the radial direction of the mandrel (7), and the second type of radial rod (14) is arranged in the circumferential direction of the inner wall of the housing (5); Each of the second type of radial rod (14) is fixedly connected with a plurality of the second type of axial rods (15); The second type of radial rod (14) is spaced apart from the first type of radial rod (12).

8. The dynamic mixing device according to claim 7, characterized in that, The gap between the first type of axial rod (13) and the second type of axial rod (15) is 0.2mm-20mm; The first axial rod (13) connected to the outermost part of the first radial rod (13) has a gap of 1mm-20mm between it and the inner wall of the housing (5) in the axial direction; The second axial rod (15), which is connected to the innermost side of the second radial rod (14), has a gap of 1mm-20mm between itself and the mandrel (7) in the axial direction.

9. The dynamic mixing device according to claim 1, characterized in that, It also includes a second feed pipe (2), One end of the second feed pipe (2) is fixedly connected to three points of the housing (5), so that the first accommodating space can communicate with the outside through the second feed pipe (2).

10. The dynamic mixing device according to claim 1, characterized in that, It also includes the frame (4), bearing housing and bearing (8), The housing (5) and the bearing seat are fixedly connected to the frame (4). The bearing (8) is disposed between the mandrel (7) and the bearing housing.

Images