Combined stirring paddle and stirrer

Abstract

The combined stirring paddle provided by the utility model comprises a stirring shaft, an upper-layer stirring paddle and a lower-layer stirring paddle, the upper-layer stirring paddle and the lower-layer stirring paddle are sequentially arranged on the stirring shaft towards the stirring end of the stirring shaft; the upper-layer stirring paddle pushes materials to move towards the lower-layer stirring paddle, and the lower-layer stirring paddle pushes the materials to move towards the upper-layer stirring paddle. Compared with the prior art, the upper-layer stirring paddle of the combined stirring paddle provided by the utility model can push a material to move towards the lower-layer stirring paddle, so that a dry material floating on the surface is downwards pressed into a material to be stirred in a stirring process; meanwhile, the lower-layer stirring paddle can promote the materials to flow from bottom to top in the stirring process, so that the materials to be stirred are further quickly and uniformly mixed, and the stirring speed is greatly improved, so that the working efficiency is improved, the energy consumption is reduced, and the quality of a final finished product is good. In addition, the utility model further provides a stirring machine.

Description

Technical Field

[0001] The utility model relates to the technical field of autoclaved aerated concrete mixing, in particular to a combined mixing paddle and a mixer. Background Art

[0002] With the continuous promotion of the national green development strategy, our demand for autoclaved aerated concrete blocks has gradually increased. Autoclaved aerated concrete blocks are a kind of porous concrete products, and their main production process is as follows: first, fly ash, lime, cement, gypsum and slag are proportioned in a certain ratio, then appropriate blowing agents, regulators and bubble stabilizers are added, and then through batching and mixing, casting, static stopping, cutting and high-pressure steam curing, the final products are obtained. Autoclaved aerated concrete blocks have the advantages of high strength and light weight, heat preservation and heat insulation, flame retardancy and fire resistance, sound absorption and noise insulation, etc., and the level of these properties depends on the mixing process during batching and mixing. At present, batching and mixing are usually carried out by a casting mixer, but the existing casting mixer has a single paddle form, and at the same time, dry materials are easy to float on the surface during the mixing process. In the field of autoclaved aerated concrete mixing, the mixing effect is not ideal, the working efficiency is low, the quality of the final product is poor, and the energy consumption is large. Summary of the Utility Model

[0003] An object of the utility model is to provide a combined mixing paddle, which has a plurality of mixing paddles, has uniform mixing during mixing, low energy consumption, and can make the quality of the final product good.

[0004] Another object of the utility model is to provide a mixer, which has uniform mixing during mixing, low energy consumption, and good quality of the obtained product.

[0005] To achieve the above object, the combined mixing paddle provided by the utility model comprises a mixing shaft, an upper mixing paddle and a lower mixing paddle, and the upper mixing paddle and the lower mixing paddle are sequentially arranged on the mixing shaft towards the mixing end direction of the mixing shaft; the direction in which the upper mixing paddle pushes the material to move faces the lower mixing paddle, and the direction in which the lower mixing paddle pushes the material to move faces the upper mixing paddle.

[0006] Compared with the prior art, in the combined mixing paddle provided by the utility model, the upper mixing paddle and the lower mixing paddle are sequentially arranged on the mixing shaft towards the mixing end direction of the mixing shaft, and the direction in which the upper mixing paddle pushes the material to move faces the lower mixing paddle, so that the dry materials floating on the surface are pressed down into the materials to be mixed during the mixing process, making the materials mixed evenly; at the same time, the direction in which the lower mixing paddle pushes the material to move faces the upper mixing paddle, which can also promote the materials to flow from bottom to top during the mixing process, further quickly mixing the materials to be mixed evenly, greatly improving the mixing rate, thereby improving the working efficiency, reducing the energy consumption, and making the quality of the final product good.

[0007] In some embodiments of the present application, the lower stirring paddle includes a first stirring paddle and a second stirring paddle, and the first stirring paddle is located between the upper stirring paddle and the second stirring paddle; the directions in which the first stirring paddle and the second stirring paddle push the material to move are both towards the upper stirring paddle.

[0008] In some embodiments of the present application, the combined stirring paddle further includes a U-shaped stirring paddle. The bottom of the U-shaped stirring paddle is connected to the end of the stirring end of the stirring shaft, and the two free ends of the U-shaped stirring paddle are connected to the two ends of the upper stirring paddle. Such a setting combines the U-shaped stirring paddle with the upper stirring paddle, enabling the combined stirring paddle to form a flow pattern suitable for stirring in the flow field, further reducing the stirring power while ensuring the stirring effect, and is particularly suitable for the stirring and mixing of high-viscosity materials.

[0009] In some embodiments of the present application, the blade structures of both the upper stirring paddle and the lower stirring paddle are the same, and each includes two outwardly convex narrow arc surfaces and two inwardly concave wide arc surfaces. The narrow arc surface is connected to the wide arc surface to form the upper surface of the blade, and the upper surface and the lower surface of the blade are centrosymmetric. Such a setting makes the blades of the upper stirring paddle and the lower stirring paddle streamline as a whole, and the stirring effect is good.

[0010] In some embodiments of the present application, the cross-sectional structures of the blades of both the upper stirring paddle and the lower stirring paddle are the same, and each includes two short arc lines and two long arc lines. The radius of the arc where the long arc line is located is R, and the radius of the arc where the short arc line is located is r. The value range of r / R is 0.02 - 0.04. Such a setting makes the blades of the upper stirring paddle and the lower stirring paddle streamline as a whole in a unique way, and the stirring effect is good.

[0011] In some embodiments of the present application, the included angle between the boundary plane between the upper surface and the lower surface of the blade of the upper stirring paddle and the radial plane of the stirring shaft is α, the included angle between the boundary plane between the upper surface and the lower surface of the blade of the first stirring paddle and the radial plane of the stirring shaft is β, and the included angle between the boundary plane between the upper surface and the lower surface of the blade of the second stirring paddle and the radial plane of the stirring shaft is γ, and 40° ≤ α ≤ 50°, 40° ≤ β ≤ 50°, 55° ≤ α ≤ 65°. Such a setting makes the flow pattern formed by the combined stirring paddle during stirring more complex, and the stirring and mixing effect is more excellent.

[0012] In some embodiments of the present application, the diameters of the blades of the upper stirring paddle, the first stirring paddle, and the second stirring paddle are D1, D2, and D3 in sequence, and the value of D1 is 2 to 2.6 times that of D3, and the value of D2 is 1.3 to 2 times that of D3.

[0013] To achieve another object of the present utility model, the mixer provided by the present utility model includes a tank body, a driving motor, and the aforementioned combined stirring paddle; the driving motor is installed on the tank body, and the output end of the driving motor is connected to the stirring shaft of the combined stirring paddle, and both the upper stirring paddle and the lower stirring paddle are suspended in the tank body.

[0014] In some embodiments of the present application, the mixer further includes a plurality of feet, and the plurality of feet are arranged around the circumferential surface of the tank body. Such an arrangement facilitates supporting the tank body and reducing the vibration generated by stirring.

[0015] In some embodiments of the present application, a plurality of observation ports are further provided on the end surface of the tank body, and covers that can rotate relative to the observation ports are provided at the plurality of observation ports to close or open the observation ports. Such an arrangement facilitates observing the mixing condition of the materials during stirring so as to adjust the stirring power in a timely manner. Description of the Drawings

[0016] Figure 1 is a perspective view of the mixer provided by the present utility model.

[0017] Figure 2 is a perspective view of the mixer provided by the present utility model.

[0018] Figure 3 is a top view of the mixer provided by the present utility model.

[0019] Figure 4 is a perspective view of the combined stirring paddle provided by the present utility model.

[0020] Figure 5 is a perspective view of the paddle blade of the combined stirring paddle provided by the present utility model.

[0021] Figure 6 is a schematic diagram of the cross-section of the paddle blade of the combined stirring paddle provided by the present utility model.

[0022] Figure 7 is a simulated flow field diagram obtained by simulating the stirring performance of the mixer provided by the present utility model through a fluid simulation software.

[0023] Figure 8 is a schematic diagram of the dimensions of the combined stirring paddle and the tank body of the mixer provided by the present utility model.

[0024] Figure 9 is a schematic diagram of the angles between the respective paddle blades of the first stirring paddle and the second stirring paddle of the combined stirring paddle provided by the present utility model and two radial planes of the stirring shaft.

[0025] Figure 10 It is a schematic diagram of the angle between the blade of the upper stirring paddle of the combined stirring paddle provided by the present utility model and a radial plane of the stirring shaft. Specific embodiments

[0026] Next, in combination with specific embodiments and the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described, and the technical solutions of the present utility model will be elaborated. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments.

[0027] Please refer to Figures 1 to 4 , the mixer 100 provided by the present utility model includes a tank body 1, a driving motor 2 and a combined stirring paddle 3. The combined stirring paddle 3 includes a stirring shaft 31, an upper stirring paddle 32 and a lower stirring paddle 33; the driving motor 2 is installed on the tank body 1 by means of a bracket 4, and the output end of the driving motor 2 is connected to the stirring shaft 31 of the combined stirring paddle 3, and the upper stirring paddle 32 and the lower stirring paddle 33 are both suspended in the tank body 1. Specifically, the upper stirring paddle 32 and the lower stirring paddle 33 are sequentially arranged on the stirring shaft 31 in the direction of the stirring end of the stirring shaft 31, the direction in which the upper stirring paddle 32 pushes the material to move is towards the lower stirring paddle 33, and the direction in which the lower stirring paddle 33 pushes the material to move is towards the upper stirring paddle 32. Therefore, the blade of the upper stirring paddle 32 is a downward pressing blade, and the blade of the lower stirring paddle 33 is an upward turning blade. The blades of the upper stirring paddle 32 and the lower stirring paddle 33 are both inclined relative to the radial plane of the stirring shaft 31. When stirring and mixing the material, the downward pressing blade can make the fluid flow downward and accelerate the mixing. Therefore, the upper stirring paddle 32 can press the dry material floating on the surface into the mixed material during stirring to make the material mix evenly. The upward turning blade can make the fluid move upward and generate a certain oscillation. Therefore, the lower stirring paddle 33 can make the material mix more fully and evenly. In this embodiment, the driving motor 2 is a reduction motor, a driving belt pulley 21 is provided at the output end of the driving motor 2, and a driven belt pulley 311 is provided at the end of the stirring shaft 31 opposite to the stirring end, and the driving belt pulley 21 and the driven belt pulley are connected by a transmission belt 22. In order to improve the safety of use, the mixer 100 further includes a protective cover 5, the protective cover 5 is connected to the bracket 4, and can cover the driving belt pulley 21, the driven belt pulley 311 and the transmission belt 22. A plurality of feed ports 101 are further provided on the upper surface of the tank body 1, a discharge port 102 is provided on the lower surface, and a pneumatic butterfly valve 103 is further provided at the discharge port 102 to control the discharge.

[0028] Please refer to again Figures 1 to 4, in some embodiments of the present application, the lower stirring paddle 33 includes a first stirring paddle 331 and a second stirring paddle 332. The first stirring paddle 331 is located between the upper stirring paddle 32 and the second stirring paddle 332; the directions in which the first stirring paddle 331 and the second stirring paddle 332 push the material to move are both towards the upper stirring paddle 32. With such a setting, when the material is pushed from the bottom of the tank body 1 towards the upper stirring paddle 32, the mixing is more uniform.

[0029] Referring to Figure 2 , in some embodiments of the present application, the combined stirring paddle 3 further includes a U-shaped stirring paddle 34. The bottom of the U-shaped stirring paddle 34 is connected to the end of the stirring end of the stirring shaft 31 and is located below the lower stirring paddle 33. The two free ends of the U-shaped stirring paddle 34 are connected to the two ends of the upper stirring paddle 32. With such a setting, the U-shaped stirring paddle 34 and the upper stirring paddle 32 are combined, so that the combined stirring paddle 3 can form a flow pattern suitable for stirring in the flow field, further reducing the stirring power while ensuring the stirring effect, and is particularly suitable for the stirring and mixing of high-viscosity materials.

[0030] Please refer to Figure 4 and Figures 8 to 9 , in some embodiments of the present application, the diameters of the blades of the upper stirring paddle 32, the first stirring paddle 331, and the second stirring paddle 332 are D1, D2, and D3 in sequence, and the value of D1 is 2 to 2.6 times that of D3, and the value of D2 is 1.3 to 2 times that of D3. Specifically, the diameter of the tank body is D, and 0.2D ≤ D3 ≤ 0.4D. The width of the U-shaped stirring paddle 34 is D4, and the height is H, and D4 = D1, and the height 0.5D ≤ H ≤ 0.6D. For the mixer 100, the preferred solution is to take D1 = D4 = 0.7D, D2 = 0.5D, D3 = 0.3D, and H = 0.55D. More specifically, the upper stirring paddle 32 has two blades, the first stirring paddle 331 has six blades, and the second stirring paddle 332 has four blades. With such a setting, it can not only avoid the combined stirring paddle 3 from touching the inner wall of the tank body 1, but also further optimize the stirring and mixing effect. Please refer to Figure 7 , the present utility model also verified the performance of the mixer 100 through fluid simulation software. It can be seen from the simulated flow field diagram that the upper stirring paddle 32 can press the dry material above to the lower part, and the combined stirring paddle 3 can generate a uniform flow field in the tank body 1 of the mixer 100, so that the components in the mixture are evenly distributed, avoiding local concentration differences, with obvious turbulent effects, which can promote dispersion and mixing, and will not generate too many dead zones, and can achieve better stirring effects with lower energy consumption.

[0031] Please refer to Figures 4 to 6 , in some embodiments of the present application, the blade structures of the upper stirring paddle 32 and the lower stirring paddle 33 are the same, and both include two concave wide arc surfaces 200 and two convex narrow arc surfaces 300. The narrow arc surface 300 is connected to the wide arc surface 200 to form the upper surface of the blade, and the upper surface and the lower surface of the blade are centrosymmetric. Specifically, the cross-sectional structures of the blades of the upper stirring paddle 32 and the lower stirring paddle 33 are the same, and both include two short arc lines 301 and two long arc lines 201. The radius of the arc where the long arc line 201 is located is R, and the radius of the arc where the short arc line 301 is located is r. The value range of r / R is 0.02 - 0.04. In this embodiment, R = 0.25D and r = 0.0075D, so r / R = 0.03. Such a setting makes the blades of the upper stirring paddle 32 and the lower stirring paddle 33 streamline as a whole, and the stirring effect is good. In addition, the formation process of the short arc line 301 and the long arc line 201 is as follows: One vertex of the diagonal of a rectangle is chamfered into a fillet with a radius of r, and then a circle with a radius of R is made with the tangent point of the fillet and the long side of the rectangle and another vertex on the long side of the rectangle. The circle with a radius of R partially coincides with the rectangle, and the arc of the part where the circle with a radius of R coincides with the rectangle is the long arc line 201, and the outer contour of the fillet is the short arc line 301. Moreover, it should be noted that the median line parallel to the long side of the rectangle and the demarcation plane M of the blade completely coincide in the projection on the cross-section of the blade.

[0032] Please refer to Figure 9 and Figure 10 , in some embodiments of the present application, the included angle between the demarcation plane M1 between the upper and lower surfaces of the blade of the upper stirring paddle 32 and a radial plane N1 of the stirring shaft 31 is α, the included angle between the demarcation plane M2 between the upper and lower surfaces of the blade of the first stirring paddle 331 and a radial plane N2 of the stirring shaft 31 is β, and the included angle between the demarcation plane M3 between the upper and lower surfaces of the blade of the second stirring paddle 332 and a radial plane N3 of the stirring shaft 31 is γ, and 40° ≤ α ≤ 50°, 40° ≤ β ≤ 50°, 55° ≤ γ ≤ 65°. After simulation by simulation software, when α = 45°, β = 45°, and γ = 60°, the stirring effect is the best. Such a setting makes the flow pattern formed by the combined stirring paddle 3 during stirring more complex and the stirring and mixing effect more excellent.

[0033] Please refer to Figures 1 to 3, in some embodiments of the present application, the blender 100 further includes a plurality of feet 6, and the plurality of feet 6 are arranged at equal intervals around the circumferential surface of the tank body 1. Such an arrangement facilitates the support of the tank body and reduces the vibration generated by stirring. In this embodiment, the number of the feet 6 is four.

[0034] Please refer to Figures 1 to 3 , in some embodiments of the present application, a plurality of observation ports 7 are further provided on the end surface of the tank body 1, and a cover body 8 that can rotate relative to the observation port 7 is provided at the observation port 7 to close or open the observation port 7. In this embodiment, the number of the observation ports 7 is one, one end of the cover body 8 is hinged to the end surface of the tank body 1, and a lifting handle 81 is provided on the surface of the cover body 8 to facilitate lifting the cover body 8. Such an arrangement facilitates observing the mixing condition of the materials during stirring so as to adjust the production process in a timely manner.

[0035] The following is an introduction to the working principle of the blender 100 provided by the present utility model. First, the materials proportioned in a certain ratio are fed into the tank body 1 through the plurality of feed ports 101, and then the drive motor 2 is started to drive the combined stirring paddle 3 to rotate, so as to stir the materials. After the stirring is uniform, the pneumatic butterfly valve 103 is used to open the discharge port 102 to send out the uniformly stirred materials.

[0036] Compared with the prior art, in the combined stirring paddle 3 provided by the present utility model, the upper stirring paddle 32 and the lower stirring paddle 33 are sequentially arranged on the stirring shaft 31 in the direction of the stirring end of the stirring shaft 31, and the direction in which the upper stirring paddle 32 pushes the materials to move is towards the lower stirring paddle 33, so that the dry materials floating on the surface are pressed down into the materials to be stirred during the stirring process, making the materials evenly mixed; at the same time, the direction in which the lower stirring paddle 33 pushes the materials to move is towards the upper stirring paddle 32, which can also promote the materials to flow from bottom to top during the stirring process, further quickly mixing the materials to be stirred evenly, greatly improving the stirring rate, thereby improving the working efficiency, reducing the energy consumption, and making the final finished product of good quality.

[0037] The foregoing disclosed content is only the preferred embodiments of the present utility model, and of course, it cannot be used to limit the scope of rights of the present utility model. Therefore, equivalent changes made according to the scope of the patent application of the present utility model still fall within the scope covered by the present utility model.

Claims

1. A combined stirring paddle, characterized in that: It includes a stirring shaft, an upper stirring paddle and a lower stirring paddle, wherein the upper stirring paddle and the lower stirring paddle are sequentially arranged on the stirring shaft toward the stirring end of the stirring shaft; the direction in which the upper stirring paddle pushes the material to move is toward the lower stirring paddle, and the direction in which the lower stirring paddle pushes the material to move is toward the upper stirring paddle.

2. The combined stirring blade according to claim 1, characterized in that: The lower stirring paddle includes a first stirring paddle and a second stirring paddle, wherein the first stirring paddle is located between the upper stirring paddle and the second stirring paddle; the direction in which the first stirring paddle and the second stirring paddle push the material to move is toward the upper stirring paddle.

3. The combined stirring blade according to claim 1, characterized in that: The combined stirring paddle also includes a U-shaped stirring paddle, the bottom of which is connected to the end of the stirring end of the stirring shaft, and the two free ends of the U-shaped stirring paddle are connected to the two ends of the upper stirring paddle.

4. The combined stirring blade according to claim 1, characterized in that: The blades of the upper stirring paddle and the lower stirring paddle have the same structure, both including two convex narrow arc surfaces and two concave wide arc surfaces, the narrow arc surfaces are connected to the wide arc surfaces to form the upper surface of the blade, and the upper surface and the lower surface of the blade are centrally symmetrical.

5. The combined stirring blade according to claim 1, characterized in that: The cross-sectional structures of the blades of the upper stirring paddle and the lower stirring paddle are the same, both including two short arcs and two long arcs, and the radius of the circle where the long arc is located is R, the radius of the circle where the short arc is located is r, and the value range of r / R is 0.02-0.

04.

6. The combined stirring blade according to claim 2, characterized in that: The angle between the boundary plane between the upper surface and the lower surface of the blade of the upper stirring paddle and a radial plane of the stirring shaft is α, the angle between the boundary plane between the upper surface and the lower surface of the blade of the first stirring paddle and a radial plane of the stirring shaft is β, the angle between the boundary plane between the upper surface and the lower surface of the blade of the second stirring paddle and a radial plane of the stirring shaft is γ, and 40°≤α≤50°, 40°≤β≤50°, 55°≤α≤65°.

7. The combined stirring blade according to claim 2, characterized in that: The diameters of the blades of the upper stirring paddle, the first stirring paddle and the second stirring paddle are D1, D2 and D3 respectively, and the value of D1 is 2 times to 2.6 times of D3, and the value of D2 is 1.3 times to 2 times of D3.

8. A mixer, characterized in that: It comprises a tank body, a driving motor and the combined stirring paddle according to any one of claims 1 to 7; the driving motor is installed on the tank body, and the output end of the driving motor is connected to the stirring shaft of the combined stirring paddle, and the upper stirring paddle and the lower stirring paddle are both suspended in the tank body.

9. The mixer according to claim 8, characterized in that The mixer further comprises a plurality of supporting feet, and the plurality of supporting feet are arranged around the circumferential surface of the tank body.

10. The mixer according to claim 8, characterized in that A plurality of observation ports are also arranged on the end surface of the tank body, and a cover body which can rotate relative to the observation ports is arranged at the plurality of observation ports so as to close or open the observation ports.

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