Paddle structure and mixer comprising same

Abstract

The invention discloses paddle structures and a mixer comprising the paddle structures, the paddle structures are arranged on two relatively parallel shaft bodies, the paddle structures are arranged in multiple groups, the multiple groups of paddle structures are connected in series in the axial direction of the shaft bodies and are arranged at intervals, each paddle structure comprises a plurality of blades, and the blades are arranged in the axial direction of the shaft bodies. The paddle structure comprises a shaft body and a plurality of blades, the blades are evenly distributed in the radial direction of the shaft body, the paddle structure further comprises kneading assemblies, the kneading assemblies are arranged on the blades in the axial direction of the shaft body and located on the two sides of the blades, each kneading assembly comprises a first kneading rod and a second kneading rod, and the first kneading rods and the second kneading rods are arranged in parallel at intervals. The connecting rod is used for connecting the end part of the first kneading rod and the end part of the second kneading rod, the first kneading rod is located at the edge, far away from the shaft body, of the blade, the second kneading rod is arranged close to the shaft body in the projection direction of the first kneading rod, and the side edge of the first kneading rod is flush with the edge of the blade.

Description

Technical Field

[0001] The present invention relates to the technical field of mixers, and in particular to a blade structure and a mixer comprising the same. Background Art

[0002] Mixers are essential equipment for mixing materials in the chemical, petrochemical, food, and pharmaceutical industries. Demand for mixers is increasing, particularly during the melt blending of polymer materials and the blending, absorption, or devolatilization of other high-solids and high-viscosity materials. To meet the mixing requirements of diverse materials, the internal structure of mixers continues to evolve to enhance mixing performance.

[0003] However, in the current market, the mixer blade structure has certain limitations. Traditional blade structures such as Roots blades, flat blades and anchor blades cannot provide axial propulsion, and therefore cannot achieve continuous mixing. The dual-axis differential rotation mixer causes a large difference in material speed within the two blade groups, which has an adverse effect on the overall uniformity of the material. Planetary mixers are widely used in the slurry mixing process. Their blades can achieve axial and radial rotation, thereby achieving a variety of mixing methods, but their mixing and dispersion effect is not as good as that of shear mixing equipment, and they cannot mix continuously and easily cause material accumulation, making cleaning difficult. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the mixer in the prior art, such as poor mixing effect and inability to mix continuously, and to provide a blade structure and a mixer comprising the same.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] A paddle structure, the paddle structure being arranged on two relatively parallel shafts, the paddle structure being provided with multiple groups, the multiple groups of paddle structures being arranged in series and at intervals along the axial direction of the shaft, the paddle structure comprising multiple blades, the multiple blades being evenly distributed along the radial direction of the shaft, and the blade structure further comprising:

[0007] A kneading assembly is arranged on the blade along the axial direction of the shaft body, and the kneading assembly is located on both sides of the blade. The kneading assembly includes a first kneading rod and a second kneading rod arranged in parallel and at intervals, and a connecting rod for connecting the end of the first kneading rod and the end of the second kneading rod. The first kneading rod is located at the edge of the blade away from the shaft body, and the second kneading rod is arranged close to the shaft body along the projection direction of the first kneading rod. The side of the first kneading rod is flush with the edge of the blade.

[0008] In this solution, a kneading assembly is provided so that the blades rotate accordingly when the shaft rotates, and the first kneading rod, the second kneading rod and the connecting rod of the kneading assembly mix and depolymerize the materials between the two adjacent groups of blade structures. Compared with the method of simply setting blades along the radial direction of the shaft to shear and stretch the mixed materials, the kneading assembly provided in the axial direction can further stir the materials and cooperate with the blades to improve the mixing effect and uniformity of the materials. It is suitable for melt blending of polymer materials and blending, absorption or devolatilization of other high-solid and high-viscosity materials. The first kneading rod is located at the edge of the blade and is provided flush, so that when the blade rotates, it can scrape off the cavity that accommodates the two shafts, such as the material accumulated on the inner wall of the mixer, to achieve self-cleaning. On this basis, the second kneading rod can further stir the material, so that the material fluidity, material distribution, dispersion mixing and depolymerization capabilities are further improved during the processing of the blade structure.

[0009] Preferably, the first kneading rod and the second kneading rod have the same length; or the length of the first kneading rod is greater than the length of the second kneading rod.

[0010] In this solution, the above-mentioned settings are used to mix and disperse different materials, thereby reducing manufacturing costs accordingly.

[0011] Preferably, when the length of the first kneading rod is greater than the length of the second kneading rod, the length difference between the first kneading rod and the second kneading rod is no more than 6 mm.

[0012] In this solution, the above arrangement is used to avoid the situation where it is difficult to achieve an effective kneading effect when the kneading rod is too short, thereby ensuring the mixing and dispersion effect of the materials.

[0013] Preferably, the thickness of the blades and the connecting rod is greater than the thickness of the first kneading rod and the second kneading rod, wherein the thickness of the blades is not less than 1 / 10 of the axial spacing between two adjacent groups of the blade structures on the same shaft, the thickness of the connecting rod is less than or equal to the thickness of the blades and greater than or equal to 3 / 4 of the thickness of the blades, and the thickness of the first kneading rod and the second kneading rod is 1 / 2 of the thickness of the blades.

[0014] In this solution, the above-mentioned setting makes the thickness of the connecting rod and the first kneading rod and the second kneading rod different. By setting a connecting rod with a thicker thickness, the material can be sheared and stretched along the extension direction of the connecting rod, thereby ensuring the shearing and stretching effect.

[0015] Preferably, the blades are detachably connected to the shaft, each blade extends in a spiral direction, and the blades of the same group of blade structures are located on the same circumference, and there is an inclination angle between the extension direction of the blades and the plane where the radial direction of the shaft is located.

[0016] In this solution, the blades extend in a spiral direction, allowing the shaft to move the material axially as it rotates. This means that the blades' rotation shears and stretches the material, driving its movement. This allows for continuous processing without being affected by material accumulation. Furthermore, the axial movement of the material by the blades differs from the axial movement of the shaft itself, eliminating the need for a structure to drive the shaft. Furthermore, the material's state during continuous movement is more stable, unaffected by shaft oscillations.

[0017] Preferably, the inclination angle is in the range of 1-10°.

[0018] In this solution, through the above-mentioned setting, the inclination angle between the extension direction of the blade and the plane where the radial direction of the shaft is located can be adjusted for different materials, which has a wider range of applications and can provide more efficient mixing efficiency for different materials.

[0019] Preferably, the blades are fan-shaped blades, and the sum of the angles of the multiple blades in each group of the blade structure is in the range of 180-270°.

[0020] In this solution, the above-mentioned arrangement ensures the mixing effect of each set of blade structures.

[0021] Preferably, when the number of the blades in the same group of the blade structures is 4 or 8, the initial phase angle of the blades on the shaft is 0°;

[0022] When the number of the blades in the same group of the blade structures is 6, the initial phase angle of the blades on the shaft is 30°.

[0023] In this solution, through the above-mentioned arrangement, the material can be effectively sheared when the shaft initially rotates, thereby ensuring a mixing effect.

[0024] Preferably, the blade structures on the two shafts are alternately arranged and the number of the blade structures is the same, and the rotational speeds of the two shafts are the same.

[0025] In this solution, through the above arrangement, the paddle structure on each shaft can effectively knead and fully stir with the material when the two shafts rotate, and the mixing effect is better when the rotation speed is the same.

[0026] A mixer comprises the blade structure described above.

[0027] In this solution, the mixer includes the above-mentioned blade structure, so that the materials can be fully mixed and deagglomerated through the blade structure. Compared with other blade structures, the mixing effect is significantly improved.

[0028] The positive progress of the present invention is that: by setting a kneading assembly so that the blades rotate accordingly when the shaft rotates, and the first kneading rod and the second kneading rod and the connecting rod of the kneading assembly mix and depolymerize the materials between the two adjacent groups of blade structures, compared with the method of simply setting blades along the radial direction of the shaft to shear and stretch the mixed materials, the kneading assembly set in the axial direction can further stir the materials and cooperate with the blades to improve the mixing effect and uniformity of the materials, and is suitable for melt blending of polymer materials and blending, absorption or devolatilization of other high-solid, high-viscosity materials. The first kneading rod is located at the edge of the blade and is set flush, so that when the blade rotates, it can scrape off the cavity that accommodates the two shafts, such as the material accumulated on the inner wall of the mixer, to achieve self-cleaning. On this basis, the second kneading rod can further stir the material, so that the material fluidity, material distribution, dispersion mixing and depolymerization capabilities are further improved during the processing of the blade structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a front view of a blade structure according to a preferred embodiment of the present invention.

[0030] Figure 2 FIG. 1 is a top view of a blade structure according to a preferred embodiment of the present invention.

[0031] Figure 3 This is a three-dimensional diagram of a blade structure according to a preferred embodiment of the present invention.

[0032] Figure 4 This is a comparison chart of the power coefficients of the blade structure of a preferred embodiment of the present invention and the traditional blade.

[0033] Figure 5 A comparison chart of flow rate data between the impeller structure of a preferred embodiment of the present invention and a traditional impeller.

[0034] Figure 6 This is a comparison chart of the pumping efficiency of the impeller structure of a preferred embodiment of the present invention and the traditional impeller.

[0035] Figure 7 This is a comparison chart of the average shear rate of the blade structure of a preferred embodiment of the present invention and the traditional blade.

[0036] Figure 8 This is a comparison chart of the depolymerization work performed on the material by the blade structure of a preferred embodiment of the present invention and the traditional blade at a rotation speed of 100 r / min.

[0037] Description of reference numerals:

[0038] Blade structure 1

[0039] Blade 11

[0040] Kneading component 12

[0041] First kneading rod 121

[0042] Second kneading rod 122

[0043] Connecting rod 123

[0044] Axis 2

[0045] Inclination angle α DETAILED DESCRIPTION

[0046] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0047] This embodiment provides a blade structure 1, the specific structure is as follows Figure 1 、 Figure 2 and Figure 3 As shown, the blade structure 1 is arranged on two relatively parallel shaft bodies 2. The blade structure 1 is provided with multiple groups. The multiple groups of blade structures 1 are arranged in series and at intervals along the axial direction of the shaft body 2. The blade structure 1 includes multiple blades 11. The multiple blades 11 are evenly distributed along the radial direction of the shaft body 2. The blade structure 1 also includes:

[0048] The kneading assembly 12 is arranged on the blade 11 along the axial direction of the shaft body 2. The kneading assembly 12 is located on both sides of the blade 11. The kneading assembly 12 includes a first kneading rod 121 and a second kneading rod 122 that are arranged in parallel and at intervals, and a connecting rod 123 for connecting the end of the first kneading rod 121 and the end of the second kneading rod 122. The first kneading rod 121 is located at the edge of the blade 11 away from the shaft body 2, and the second kneading rod 122 is arranged close to the shaft body 2 along the projection direction of the first kneading rod 121. The side of the first kneading rod 121 is flush with the edge of the blade 11.

[0049] Specifically, the shaft 2 is a cylindrical structure that rotates itself. The paddle structure 1 is mounted on the shaft 2 and rotates accordingly when the shaft 2 rotates, mixing and dispersing the material placed between the two shafts 2, thereby achieving material deagglomeration. The paddle structure 1 includes blades 11. The blades 11 are plate-like, and multiple blades 11 are spaced around the same circumference in the same set of blade structures 1. The side edges of the blades 11 shear and stretch the material during rotation, meeting the material mixing requirements. At the same time, a kneading component 12 is arranged on the blade 11 along the axial direction, so that the material is stirred in the radial direction through the kneading component 12 when the blade 11 rotates, thereby improving the flow efficiency of the material on the blade 11. The two parallel shafts 2 are both provided with a paddle structure 1, so that the blades 11 on the two shafts 2 can knead each other and have sufficient shear force and tensile force when mixing the materials. On this basis, the kneading component 12 that drives the flow of the material drives and flows the material to the blade 11 on the other shaft 2, so as to mix and depolymerize the material more quickly and efficiently. Compared with the method of simply setting the blade 11 along the radial direction of the shaft 2 to shear and stretch the mixed material, the kneading component 12 arranged along the axial direction can further stir the material and cooperate with the blade 11 to improve the mixing effect and uniformity of the material, which is suitable for the melt blending of polymer materials and the blending, absorption or devolatilization of other high-solid and high-viscosity materials.

[0050] In addition, the kneading assembly 12 includes a first kneading rod 121, a second kneading rod 122 and a connecting rod 123. The first kneading rod 121, the second kneading rod 122 and the connecting rod 123 are rods and the cross-sections of the rods are all rectangular. The first kneading rod 121 is arranged close to the edge of the blade 11 and away from the shaft 2. In this embodiment, the first kneading rod 121 coincides with the vertical line of the center of gravity of the blade 11, and one side of the first kneading rod 121 is arranged flush with the edge of the blade 11, so that when the blade structure 1 is located in a mixer or other cavity structure, the first kneading rod 121 can be arranged close to the inner wall of the mixer or cavity structure. When the first kneading rod 121 rotates with the shaft 2, it can promptly scrape off the material accumulated on the inner wall of the mixer or cavity structure, so as to achieve self-cleaning of the inner wall of the mixer or cavity structure while stirring and mixing the material. The second kneading rod 122 is arranged along the projection direction of the first kneading rod 121 and has a certain distance therebetween. That is, the second kneading rod 122 is arranged close to the shaft body 2 along the radial direction of the blade 11. From the appearance, the first kneading rod 121 and the second kneading rod 122 are parallel along the projection direction. The second kneading rod 122 is arranged on the basis of the first kneading rod 121, which can further stir the material, so that when the two shaft bodies 2 rotate, the first kneading rod 121 and the second kneading rod 122 simultaneously drive the material to flow to the blade 11 on the other shaft body 2.

[0051] In addition, a connecting rod 123 is further provided at the end of the first kneading rod 121 and the second kneading rod 122. The connecting rod 123 extends in the radial direction of the shaft body 2 to connect the first kneading rod 121, the second kneading rod 122 and the side wall of the blade 11 to form a closed quadrilateral. The quadrilateral can further stir the material, so that the material fluidity, material distribution, dispersion mixing and deagglomeration capabilities are further improved during the processing of the blade structure 1.

[0052] In this embodiment, the lengths of the first kneading rod 121 and the second kneading rod 122 are the same; or the length of the first kneading rod 121 is greater than the length of the second kneading rod 122 .

[0053] Specifically, when the first kneading rod 121 and the second kneading rod 122 have the same length, the connecting rod 123 is arranged vertically and forms a rectangular structure after being connected. Since the first kneading rod 121 and the second kneading rod 122 of the rectangular structure have the same length, when stirring the material, a larger flow rate of material can be stirred. For materials with higher viscosity, it is easier to flow and facilitates continuous mixing. The mixing effect is effectively met and self-cleaning can be achieved in time.

[0054] When the length of the first kneading rod 121 is greater than that of the second kneading rod 122, the connecting rod 123 is tilted due to the different lengths of the first kneading rod 121 and the second kneading rod 122, and a trapezoidal structure is formed after being connected. Due to the dimensional characteristics of the trapezoidal structure, the first kneading rod 121 with a longer length can ensure effective self-cleaning of the inner wall of the mixer or cavity structure, while the second kneading rod 122 with a shorter length can be suitable for materials with less viscosity when stirring the material. On the basis of satisfying the above-mentioned mixing effect, the manufacturing cost of the blade structure 1 is further reduced.

[0055] In this embodiment, when the length of the first kneading rod 121 is greater than the length of the second kneading rod 122 , the length difference between the first kneading rod 121 and the second kneading rod 122 is no greater than 6 mm.

[0056] Specifically, the number of blades 11 provided within the same paddle structure 1 can be adjusted accordingly. For example, when the number of blades 11 within the same paddle structure 1 is four, the lengths of the first and second kneading bars 121 and 122 remain consistent. However, when the number of blades 11 increases or decreases, the length of the second kneading bars 122 changes accordingly. This is intended to ensure that the required mixing capacity for different materials varies when processing them. Based on this, multiple experimental data from substituting different materials indicate that when the number of blades 11 is changed, the length difference between the first and second kneading bars 121, 122 should not be less than 6 mm. In other words, the length of the first kneading bar 121 remains unchanged, while the length of the second kneading bar 122 is adjusted for different materials, and the length of the second kneading bar 122 should not be less than the length of the first kneading bar 121 minus 6 mm. It is understood that both the first kneading bar 121 and the second kneading bar 122 extend from the side wall of the blade 11 in the axial direction of the shaft body 2. That is, the difference in the axial dimension between the end of the second kneading bar 122 away from the blade 11 and the end of the first kneading bar 121 away from the blade 11 is no more than 6 mm. This prevents the second kneading bar 122 from being too short, which would prevent effective kneading, thereby ensuring effective mixing and dispersion of the material.

[0057] In this embodiment, the length of the first kneading rod 121 is obtained by subtracting the kneading gap between the two parallel shaft bodies 2 from half of the axial spacing between the blades 11 of two adjacent groups of blade structures 1 on the same shaft body 2, wherein the kneading gap is 2 mm and the axial spacing between the blades 11 of two adjacent groups of blade structures 1 is 36 mm, thereby ensuring that the length of the first kneading rod 121 meets the requirements of self-cleaning and mixing materials, and preventing the first kneading rod 121 from being too short to effectively mix materials.

[0058] In other embodiments, when the number of blades 11 changes, for example, the number of blades 11 decreases and the size increases, the length dimensions of the first kneading rod 121 and the second kneading rod 122 increase accordingly to meet the mixing requirements. Of course, when the number of blades 11 increases and the size decreases, the length dimensions of the first kneading rod 121 and the second kneading rod 122 can be further adjusted according to the above range, which will not be elaborated here.

[0059] In this embodiment, the thickness of the blade 11 and the connecting rod 123 is greater than the thickness of the first kneading rod 121 and the second kneading rod 122, wherein the thickness of the blade 11 is not less than 1 / 10 of the axial spacing between two adjacent groups of blade structures 1 on the same shaft 2, the thickness of the connecting rod 123 is less than or equal to the thickness of the blade 11 and greater than or equal to 3 / 4 of the thickness of the blade 11, and the thickness of the first kneading rod 121 and the second kneading rod 122 is 1 / 2 of the thickness of the blade 11.

[0060] Specifically, this embodiment uses the example of a blade 11 having a thickness of 4 mm, but this is not intended to be limiting. Based on this, the thickness of the first and second kneading bars 121, 122 is 2 mm, while the thickness of the connecting bar 123 is in the range of 3-4 mm. By setting the thickness of the connecting bar 123 to be greater than the thickness of the first and second kneading bars 121, 122, the material is sheared and stretched in the direction in which the connecting bar 123 extends when the kneading assembly 12 rotates. In other words, in addition to the blades 11, the connecting bar 123 also shears and mixes the material along the radial direction of the shaft 2, further enhancing the mixing effect.

[0061] It can be understood that the setting gap between the first kneading rod 121 and the second kneading rod 122 along the projection direction is adjusted by the number of blades 11. When the number of blades 11 is small, for example, when the number of blades 11 is 2, the setting gap between the first kneading rod 121 and the second kneading rod 122 along the projection direction is increased accordingly. When the number of blades 11 increases, the setting gap between the first kneading rod 121 and the second kneading rod 122 along the projection direction is reduced accordingly. The actual value range can be adjusted according to multiple experimental data. This is the existing technology and will not be elaborated on here.

[0062] In this embodiment, the blades 11 are detachably connected to the shaft 2, each blade 11 extends in a spiral direction and the blades 11 of the same group of blade structures 1 are located on the same circumference, and there is an inclination angle between the extension direction of the blade 11 and the plane of the radial direction of the shaft 2.

[0063] Specifically, the multiple blades 11 of the same set of blade structures 1 all extend in a spiral direction, and this spiral direction is at an angle with the plane of the radial direction of the shaft body 2, with the angle being α. The blades 11 are set at an angle α so that when the blades 11 rotate along the shaft body 2, they exert an axial force along the axial direction of the shaft body 2 to push the material to move. This axial force is achieved according to the spiral direction. During rotation, the blades 11 and the kneading assembly 12 shear and stretch the material, and by setting the angle α on the blades 11, the material is driven to move in the axial direction. Compared with the additional mechanism for pushing the material to move, this is less expensive. Compared with the method of moving the material by the shaft body 2 itself moving in the axial direction, the shaft body 2 will not oscillate during the process of pushing the material to move, and the state of the material during continuous movement is more stable. In addition, the kneading assembly 12 can achieve self-cleaning and agitation of the material, so that the material can be processed continuously without being affected by material accumulation.

[0064] It should be noted that multiple blades 11 are located on the same circumference, rather than being arranged in sequence away from each other in a spiral direction. This arrangement allows the flow rate of the material to be adjusted by the rotation speed of the shaft 2 during movement, and the material flow rate will not be too fast, so that the material can be repeatedly mixed and then flowed to the next step, avoiding the need for repeated processing of the material or the need to further increase the number of blade structures 1 and the length of the shaft 2.

[0065] It can be understood that when the inclination angle α is adjusted within the range of 1-10°, the time that the material stays in contact with the blades 11 of different inclination angles also changes accordingly. The smaller the inclination angle, the longer the residence time, while the larger the inclination angle, the shorter the residence time. Adjusting the inclination angle when processing materials of different materials can change the flow efficiency of the material.

[0066] In this embodiment, the inclination angle ranges from 1 to 10°. That is, α ranges from 1 to 10°. For example, α is 5°. The multiple blades 11 of the same set of blade structures 1 all align in a spiral direction and have an inclination angle of 5°. The blades 11 of two adjacent sets of blade structures 1 on the same shaft 2 also have an inclination angle of 5°. This ensures that the axial spacing between the blades 11 of the two adjacent sets of blade structures 1 remains equal. The blades 11 of the blade structure 1 on another shaft 2 arranged parallel to the shaft 2 also have an inclination angle of 5°. The difference is that the blade structures 1 on the other shaft 2 are interlaced with the blade structures 1 on the shaft 2 and interlock with each other to fully mix the materials. Furthermore, within the above range, the blades 11 detachably connected to the shaft 2 are connected via a detachable key, such as a flat key or spline, to adjust the inclination angle between the extension direction of the blades 11 and the plane of the radial direction of the shaft 2 for materials of different materials. This provides a wider range of applicability and more efficient mixing efficiency for materials of different materials.

[0067] In this embodiment, the blades 11 are fan-shaped blades, and the sum of the angles of the multiple blades 11 of each set of blade structures 1 is in the range of 180-270°.

[0068] Specifically, the blades 11 are fan-shaped and have fan angles, and the sum of the fan angles of the multiple blades 11 is 180-270°. In this embodiment, the number of blades 11 ranges from 2 to 10, that is, when the number of blades 11 is 2 or the number of blades 11 is 10, the sum of the fan angles of the multiple blades 11 still satisfies 180-270°. It can be understood that when the number of blades 11 is small, the fan angle of a single blade 11 is large and the size of a single blade 11 is large. On the contrary, when the number of blades 11 is large, the size of a single blade 11 is small. The number of blades 11 and the size of blades 11 are simulated based on multiple experimental data to obtain the best mixing effect for materials of different materials. This method is a prior art and will not be elaborated on here.

[0069] In this embodiment, when the number of blades 11 in the same set of blade structures 1 is 4 or 8, the initial phase angle of the blades 11 on the shaft 2 is 0°;

[0070] When the number of blades 11 in the same set of blade structures 1 is 6, the initial phase angle of the blades 11 on the shaft 2 is 30°.

[0071] Specifically, when the number of blades 11 in the same set of blade structures 1 is four, based on the sum of the angles of the multiple blades 11 ranging from 180-270°, the fan angle of the blades 11 is set to 45°. In this case, the four blades 11 can be evenly arranged at the initial phase angle of 0° of the shaft 2, so that shear mixing of the material can be achieved upon the initial rotation of the shaft 2. Similarly, when the number of blades 11 in the same set of blade structures 1 is eight, the blades 11 can also be arranged at the initial phase angle of 0° of the shaft 2. When the number of blades 11 is six, the blades 11 need to be arranged at the initial phase angle of 30° of the shaft 2 to ensure that shear mixing of the material can be achieved upon the initial rotation of the shaft 2, ensuring the mixing effect and reducing the time required to shear the material. Of course, when further changing the number of blades 11, the initial phase angle of the blades 11 on the shaft 2 must also be changed accordingly. Users can adjust the initial phase angle accordingly based on experimental data to achieve the goal of timely shearing of the material.

[0072] In this embodiment, the blade structures 1 on the two shaft bodies 2 are alternately arranged and the number of the blade structures 1 is the same, and the two shaft bodies 2 have the same rotational speed.

[0073] Specifically, the two shafts 2 rotate at the same speed and in the same or opposite directions. On this basis, the paddle structures 1 on the two parallel shafts 2 are alternately arranged, i.e., the paddle structure 1 on the other shaft 2 is located between two adjacent groups of paddle structures 1 spaced axially on the shaft 2, and is located halfway between the two groups of paddle structures 1, and vice versa. By alternating the paddle structures 1 on the two shafts 2, the paddle structures 1 on each shaft 2 can effectively knead and fully agitate the material when the two shafts 2 rotate. The mixing effect is better when the speeds are the same.

[0074] It can be understood that the second kneading rods 122 on different shafts 2 in the alternating blade structures 1 will also knead each other. Specifically, when the second kneading rods 122 arranged along the axial direction are extended, the second kneading rods 122 of the blade structure 1 located on another shaft 2 and alternating with it also extend along the axial direction and are located in the alternating area. On this basis, the two rotating shafts 2 drive the second kneading rods 122 on their respective shafts 2 to knead each other to shear and stretch the material, stirring the material to deagglomerate.

[0075] This embodiment also provides a mixer, which includes the above-mentioned blade structure 1.

[0076] Specifically, the mixer includes the above-mentioned blade structure 1 and shaft body 2. The blade structure 1 and shaft body 2 are arranged in the mixer, and the edges of the blades 11 of the blade structure 1 and the first kneading rod 121 are both in clearance with the inner wall of the mixer. The wheelbase between the two parallel shaft bodies 2 is determined according to the power of the mixer. This embodiment is described by taking the same set of blade structures 1 containing four 60° fan-shaped blades 11 as an example, but it is not limited thereto. Furthermore, the inner diameter of the mixer is 64mm, the wheelbase of the two shaft bodies 2 is 45mm, the axial spacing between two adjacent sets of blade structures 1 on the same shaft body 2 is 36mm, the blade 11 thickness is 4mm, the length of the first kneading rod 121 and the second kneading rod 122 are both 12mm, the length of the connecting rod 123 is 6.5mm, the initial phase angle of the blades 11 on the two shaft bodies 2 is 0°, and the motor power of the mixer is 4.5kw. This embodiment is carried out by testing dimethyl silicone oil with a viscosity of 10.8Pa·s and a density of 1000kg / m 3 , tracer particle size 0.4~0.8mm, density 2000kg / m 3 Mix and refer to Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 The experimental data in the figure show that the mixer with the blade structure 1 has a better mixing effect than the traditional mixer, and the mixing effect is significantly improved.

[0077] like Figure 4 As shown in the figure, the parameters of blade structure 1 in this embodiment are the bar graphs that slope downward from left to right, while the parameters of the conventional blade structure are the bar graphs that slope upward from left to right. Under five speed conditions, the power coefficient of blade structure 1 in this embodiment is increased by an average of 9% compared to the conventional blade structure.

[0078] like Figure 5 As shown in the figure, under five rotational speed conditions, the flow rate of the blade structure 1 in this embodiment is increased by an average of 29.4% compared with the blade structure of the traditional structure, which reflects that the blade structure 1 in this embodiment has a stronger driving effect on the material and better fluidity.

[0079] like Figure 6 As shown in FIG. 1 , under five rotational speed conditions, the pumping efficiency of the blade structure 1 in this embodiment is increased by an average of 18.4% compared to the blade structure of the conventional structure, which indicates that the blade structure 1 in this embodiment has higher efficiency and lower operating cost.

[0080] like Figure 7 As shown in FIG. 1 , under five rotational speed conditions, the average shear rate in the flow field of the blade structure 1 of this embodiment increases by 9.6% compared to the blade structure of the conventional structure, indicating that the blade structure 1 of this embodiment has a stronger shearing effect on the material.

[0081] like Figure 8 As shown, the parameters of the blade structure 1 in this embodiment are the parameters indicated by the triangular dotted line in the dotted graph, while the parameters of the conventional blade structure are the parameters indicated by the circular dotted line in the dotted graph. At a rotational speed of 100 r / min, a higher proportion of material in the blade structure 1 in this embodiment experiences high cumulative deagglomeration work than in the conventional blade structure. This indicates that the blade structure 1 in this embodiment has a stronger deagglomeration effect on agglomerates.

[0082] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. A paddle structure, wherein the paddle structure is arranged on two relatively parallel shafts, the paddle structure is provided with multiple groups, the multiple groups of the paddle structures are arranged in series and at intervals along the axial direction of the shaft, the paddle structure includes multiple blades, and the multiple blades are evenly distributed along the radial direction of the shaft, characterized in that: The blade structure also includes: A kneading assembly is arranged on the blade along the axial direction of the shaft body, and the kneading assembly is located on both sides of the blade. The kneading assembly includes a first kneading rod and a second kneading rod arranged in parallel and at intervals, and a connecting rod for connecting the end of the first kneading rod and the end of the second kneading rod. The first kneading rod is located at the edge of the blade away from the shaft body, and the second kneading rod is arranged close to the shaft body along the projection direction of the first kneading rod. The side of the first kneading rod is flush with the edge of the blade.

2. The blade structure according to claim 1, characterized in that: The length of the first kneading bar is the same as that of the second kneading bar; or the length of the first kneading bar is greater than that of the second kneading bar.

3. The blade structure according to claim 2, characterized in that: When the length of the first kneading rod is greater than the length of the second kneading rod, the length difference between the first kneading rod and the second kneading rod is no more than 6 mm.

4. The blade structure according to claim 1, characterized in that: The thickness of the blades and the connecting rod is greater than the thickness of the first kneading rod and the second kneading rod, wherein the thickness of the blades is not less than 1 / 10 of the axial spacing between two adjacent groups of the blade structures on the same shaft, the thickness of the connecting rod is less than or equal to the thickness of the blades and greater than or equal to 3 / 4 of the thickness of the blades, and the thickness of the first kneading rod and the second kneading rod is 1 / 2 of the thickness of the blades.

5. The blade structure according to claim 1, characterized in that: The blades are detachably connected to the shaft, each blade extends in a spiral direction, and the blades of the same group of blade structures are located on the same circumference. There is an inclination angle between the extension direction of the blades and the plane where the radial direction of the shaft is located.

6. The blade structure according to claim 5, characterized in that: The inclination angle ranges from 1 to 10 degrees.

7. The blade structure according to claim 1, characterized in that: The blades are fan-shaped blades, and the sum of the angles of the multiple blades in each group of the blade structure is in the range of 180-270°.

8. The blade structure according to claim 1, characterized in that: When the number of blades in the same group of blade structures is 4 or 8, the initial phase angle of the blades on the shaft is 0°; When the number of the blades in the same group of the blade structures is 6, the initial phase angle of the blades on the shaft is 30°.

9. The blade structure according to claim 1, characterized in that: The blade structures on the two shafts are alternately arranged and the number of the blade structures is the same, and the rotational speeds of the two shafts are the same.

10. A mixer, characterized in that: The mixer comprises a blade structure according to any one of claims 1 to 9.

Images