A stirring paddle and mineral powder modification device
By designing and optimizing the agitator structure and guide block, the problem of uneven mixing in the mineral powder modification equipment was solved, achieving full mixing of the modifier and mineral powder and improving the mixing efficiency.
Patent Information
- Application Number
- CN202610373527.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-25
- Publication Date
- 2026-06-12
Smart Images
Figure CN122183428A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of mineral powder modification, and in particular to a stirring paddle and a mineral powder modification device. Background Technology
[0002] Mineral powder is a type of solid waste commonly used in the construction industry. If mineral powder is to be applied to other industries, such as the plastics industry, it needs to undergo modification treatment to increase the strength and compressive strength of the plastic products.
[0003] In research and development experiments, the modification of mineral powder requires adding the mineral powder to a high-speed mixing tank and heating and stirring it together with the added modifying agent to ensure sufficient bonding and coating reaction between the modifying agent and the mineral powder. Therefore, in this step, in addition to temperature, a more uniform stirring effect is also required. However, experiments have shown that the mixing effect of commercially available high-speed mixing tanks is poor in terms of material convergence towards the center, with most of the material being dispersed to the inner wall by centrifugal force for mixing. Especially after adding solid modifying agents, because the added solid modifying agent (aluminate) melts due to the temperature upon entering the mixing tank, and the addition point is located at the center of the tank, the mixing effect between the mineral powder and the modifying agent is reduced, resulting in uneven mixing. If the addition point is changed to a position off-center from the tank, although the mixing effect can be improved, the oil absorption value of the produced modified mineral powder is still higher than expected.
[0004] Therefore, the mixing equipment used in mineral powder modification still suffers from uneven mixing due to axial convection difference. Summary of the Invention
[0005] In order to improve the uneven mixing caused by poor axial convection in the mixing equipment for mineral powder modification, this application provides a mixing impeller and a mineral powder modification device.
[0006] The stirring paddle provided in this application adopts the following technical solution: A stirring paddle, comprising Rotating shaft; The bulk material slurry includes a bottom ring and a bottom plate. The bottom ring is mounted on a rotating shaft, and there are multiple bottom plates fixed to the circumferential outer wall of the bottom ring. The mixing paddle, located above the bulk paddle, includes a central ring, distributing blades, a fixed ring, and an auxiliary paddle. The central ring is mounted on a rotating shaft. Multiple distributing blades are circumferentially distributed and fixed on the outer circumferential wall of the central ring. The fixed ring is fixed to the end of the distributing blades away from the central ring. The auxiliary paddle is fixed on the outer circumferential wall of the fixed ring. The distributing blades are all inclined. As the rotating shaft rotates, the upper surface of the distributing blades can push the material they are in contact with upwards. The thickness of the auxiliary paddle is smaller the closer it is to the direction of rotation of the rotating shaft. The directional paddle, located above the mixing paddle, includes a top ring and directional plates. The top ring is mounted on a rotating shaft, and multiple directional plates are fixed on the circumferential outer wall of the top ring. The directional plates are inclined upward from the top ring and then bent upward.
[0007] Optionally, a pusher plate is fixed at the end of the auxiliary paddle away from the central ring. The pusher plate is inclined upwards and pushes the material it contacts away from the rotating shaft and upwards as the rotating shaft rotates.
[0008] Optionally, an upwardly inclined guide plate is fixed on the side of the base plate away from the rotation direction of the rotating shaft, and the guide plate is located directly below the rotation area of the separating plate.
[0009] Optionally, the two ends of the splitter are twisted, and the end closer to the middle ring is closer to a vertical state than the end closer to the fixed ring.
[0010] Optionally, the upward-bent portion of the guide plate is the guide section, and the portion of the guide section away from the rotation direction of the rotation axis is bent upward.
[0011] Optionally, the bending portion of the directional part gradually increases in the direction away from the top ring.
[0012] This application also provides a mineral powder modification device with the following technical solution: A mineral powder modification device includes the aforementioned stirring paddle, and further includes... The mixing tank has a rotating shaft at the bottom driven by a motor, and the stirring paddle is mounted on the rotating shaft; The guide block is located at the top of the inner wall of the mixing tank. The guide block gradually thickens in the direction of rotation of the rotating shaft. The guide block gradually thickens from the bottom to the top and is located above the directional impeller. The top cover is installed on top of the mixing tank to seal it. It is equipped with a discharge cylinder, the bottom of which is connected to the mixing tank through the top cover.
[0013] Optionally, the inner diameter of the mixing tank is D1, and the distance L1 from the end of the bulk material paddle to the center of the rotating shaft is in the range of: 0.3D1≤L1≤0.38D1; The range of the inner diameter D2 of the fixed ring is: 0.28D1≤D2≤0.3D1; The maximum distance L2 between the auxiliary propeller and the rotation shaft is in the range of: 0.4D1≤L2≤0.46D1; The range of the farthest distance L3 between the directional plate and the rotation axis is: 0.32D1≤L3≤0.36D1.
[0014] Optionally, the distance L4 between the center of the guide block and the top of the directional plate is in the range of: 0.07D1≤L4≤0.12D1.
[0015] Optionally, an extension rod is fixed to the bottom of the top cover, and an intercepting plate is fixed to the bottom end of the extension rod, with the intercepting plate located opposite to the guide block.
[0016] In summary, this application includes at least one of the following beneficial technical effects: As the rotating shaft rotates, the bottom paddle can disperse the material at the bottom and push the material it comes into contact with to the upper dispensing plate through the guide plate, reducing the accumulation of material at the bottom. The rotation of the mixing paddle can push the material pushed up by the guide plate upward again through the twisting setting of the dispensing plate and spread it to the surroundings. On the other hand, it can also push the modified additives falling from above to the surroundings, thereby improving the mixing efficiency of the modified additives and thus forming a "turbulent" effect at the stirring shaft. The material pushed out by the pusher plate will come into contact with the inner wall of the mixing tank and move upward and towards the rotation axis due to inertia. It will move upward together with the material in contact with the separating plate and then come into contact with the directional paddle. The directional paddle will stir the material again through the directional plate and push the material in contact upward through the directional part, so that the material comes into contact with the guide block along the inner wall of the mixing tank. Then, the material in contact with the guide block will flow towards the mixing axis, which can effectively improve the axial convection of the mixing and thus improve the mixing effect of the added modifier and mineral powder. The interceptor plate can be designed to work in conjunction with the guide block, allowing the powder flowing down from the guide plate to fall more concentratedly into the middle of the mixing tank, thus achieving thorough mixing with the added modifier. This improves upon the previous defect where there was less material in the center of the mixing tank, making it impossible to fully mix the added material. On the other hand, it allows the melted modifier to initially mix with the falling powder during the falling process, improving the mixing effect of the modifier and mineral powder. Attached Figure Description
[0017] Figure 1 This is a structural schematic diagram of an embodiment of this application; Figure 2 It is a partial cross-sectional view showing the interior of the mixing tank; Figure 3 This is a partial cross-sectional view showing the agitator; Figure 4 This is a partial schematic diagram showing the mixing blades after the mixing tank is hidden; Figure 5 It is an exploded view showing only the agitator; Figure 6 This is a schematic diagram showing the size relationship of the stirring paddles.
[0018] In the diagram, 1. Mixing tank; 11. Rotating shaft; 111. Clamping block; 112. Clamping groove; 12. Guide block; 13. Top cover; 131. Feeding cylinder; 132. Extension rod; 133. Interceptor plate; 2. Dispersing paddle; 21. Bottom ring; 22. Bottom plate; 221. Guide plate; 3. Mixing paddle; 31. Middle ring; 32. Dividing plate; 33. Fixing ring; 34. Auxiliary paddle; 341. Push plate; 4. Directional paddle; 41. Top ring; 42. Directional plate; 421. Directional section. Detailed Implementation
[0019] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.
[0020] This application discloses a stirring paddle and a mineral powder modification device. Since the stirring paddle is present in the mineral powder modification device, it will be described in one embodiment.
[0021] refer to Figure 1 and Figure 2 The mineral powder modification device includes a stirring paddle, a mixing tank 1, a guide block 12, and a top cover 13. A motor-driven rotating shaft 11 is located at the bottom of the mixing tank 1, with the shaft positioned in the middle. The stirring paddle is mounted on the rotating shaft 11. The top cover 13 is fastened to the top of the mixing tank 1, sealing it. A feed cylinder 131 is mounted on the top cover 13, and its bottom is connected to the mixing tank 1 via the top cover 13, allowing the addition of modifying agents within the mixing tank 1.
[0022] Combination Figure 2 and Figure 3 The top cover 13 has multiple extension rods 132 fixed at its bottom, the number of which is the same as the number of guide blocks 12. An intercepting plate 133 is fixed at the bottom end of each extension rod 132. Multiple guide blocks 12 are distributed equidistantly in a circle around the central axis of the rotating shaft 11 on the top portion of the outer wall of the mixing tank 1. In this embodiment, there are two guide blocks 12. The thickness of the guide blocks 12 gradually increases in the rotation direction of the rotating shaft 11, gradually thickening from bottom to top. The intercepting plate 133 is located opposite the guide blocks 12. Material that comes into contact with the guide blocks 12 due to inertia will abut against the intercepting plate 133 and fall after separating from the guide blocks 12.
[0023] The raw materials, such as mineral powder (excluding the modifying agent), are directly added into the mixing tank 1. After the top cover 13 is closed, the rotation of the electric motor drives the stirring shaft to rotate, thereby using the stirring paddle to stir the materials in the mixing tank 1 at high speed. Subsequently, the modifying agent is added into the mixing tank 1 through the feeding cylinder 131 and mixed with the high-speed flowing mineral powder raw materials. Some of the raw materials come into contact with the guide block 12 and abut against the intercepting plate 133 due to inertia, falling into the center of the mixing tank 1, thereby improving the axial convection capacity of the mineral powder raw materials in the mixing tank 1, so as to improve the uniformity of the mixing of the modifying agent and the mineral powder.
[0024] refer to Figure 4 and Figure 5 The mixing impeller includes a bulk material impeller 2, a mixing impeller 3, and a directional impeller 4. The bulk material impeller 2 is located at the bottom and includes a bottom ring 21 and a bottom plate 22. The bottom ring 21 is mounted on the rotating shaft 11, and multiple bottom plates 22 are welded and fixed to the circumferential outer wall of the bottom ring 21. An upwardly inclined guide plate 221 is fixed to the side of the bottom plate 22 away from the rotation direction of the rotating shaft 11, and the height of the guide plate 221 gradually decreases from the end near the rotating shaft 11 to the end away from the rotating shaft 11.
[0025] The mixing paddle 3 is located in the middle, above the bulk paddle 2. The mixing paddle 3 includes a central ring 31, distributing blades 32, a fixing ring 33, and auxiliary paddles 34. The central ring 31 is mounted on the rotating shaft 11; multiple distributing blades 32 are equidistantly distributed in a circle around the central axis of the rotating shaft 11 on the outer circumferential wall of the central ring 31; the fixing ring 33 is fixed to the end of the distributing blades 32 away from the central ring 31; multiple auxiliary paddles 34 are equidistantly fixed in a circle around the central axis of the fixing ring 33 on the outer circumferential wall of the fixing ring 33. In this embodiment, there are two auxiliary paddles 34, and the thickness decreases as they approach the rotation direction of the rotating shaft 11. A pusher plate 341 is fixed to the end of the auxiliary paddle 34 away from the central ring 31. The pusher plate 341 is inclined upwards and pushes the material it contacts away from the rotating shaft 11 and upwards as the rotating shaft 11 rotates. The dispensing plates 32 are all inclined, with both ends of the dispensing plates 32 twisted, and the end closer to the middle ring 31 is closer to a vertical state than the end closer to the fixed ring 33. The guide plate 221 is located directly below the area swept by the rotating dispensing plates 32.
[0026] The directional paddle 4 is located at the top of the rotating shaft 11, above the mixing paddle 3. The directional paddle 4 includes a top ring 41 and directional plates 42. The top ring 41 is mounted on the rotating shaft 11, and multiple directional plates 42 are equidistantly distributed circumferentially on the outer circumferential wall of the top ring 41, centered on the central axis of the rotating shaft 11. In this embodiment, there are two directional plates 42. The directional plates 42 are flat, inclined upwards from the top ring 41, and then bent upwards. The upwardly bent portion of the directional plate 42 is the directional section 421, which bends upwards away from the rotation direction of the rotating shaft 11. The bent portion of the directional section 421 gradually increases in size in the direction away from the top ring 41. The directional section 421, as the rotating shaft 11 rotates, can deflect the material it contacts into the guide block 12.
[0027] The inner circumferential walls of the bottom ring 21, middle ring 31, and top ring 41 are all fixed with grooves 112, and the outer circumferential wall of the rotating shaft 11 is fixed with a locking block 111, which abuts against the grooves 112 to restrict the rotation of the bottom ring 21, middle ring 31, and top ring 41 on the rotating shaft 11. The diameter of the rotating shaft 11 decreases in three stepped sections from bottom to top, and the bottom ring 21, middle ring 31, and top ring 41 abut against the corresponding stepped grooves after installation. The outer circumferential wall of the rotating shaft 11 has multiple locking holes, and the bottom ring 21, middle ring 31, and top ring 41 are fixed by bolts with their own threads passing through the corresponding locking holes after installation. After the agitator is installed, the position of the base plate 22 is opposite to the directional plate 42, and the position of the auxiliary impeller 34 is offset from the base plate 22.
[0028] Combination Figure 5 and Figure 6 Wherein: the inner diameter of the mixing tank 1 is D1, the distance L1 from the end of the bulk material paddle 2 to the center of the rotating shaft 11 is in the range of 0.3D1≤L1≤0.38D1. The inner diameter D2 of the fixing ring 33 is in the range of 0.28D1≤D2≤0.3D1.
[0029] The range of the farthest distance L2 between the auxiliary propeller 34 and the rotating shaft 11 is: 0.4D1≤L2≤0.46D1.
[0030] The range of the farthest distance L3 between the directional plate 42 and the rotation axis 11 is: 0.32D1≤L3≤0.36D1.
[0031] The distance L4 between the center of the guide block 12 and the top of the directional plate 42 is in the range of: 0.07D1≤L4≤0.12D1.
[0032] When the mixing paddle agitates the material, the bottom plate 22 is responsible for agitating the material at the bottom of the mixing tank 1, so that the bottom plate 22 comes into contact with the material and is dispersed by high-speed rotation. At this time, the bottom plate 22 moves the material to the area of the distributing plate 32 above through the guide plate 221, and at the same time pushes the material to the inner wall of the mixing tank 1 for dispersion. The mixing paddle 3 uses the distributing plate 32 to further push the powder pushed up to the inner wall of the mixing tank 1. The torsional setting of the distributing plate 32 facilitates processing and manufacturing, enhances the dispersion effect near the rotating shaft 11, enhances the upward pushing effect of the material in the middle, and reduces rotational resistance near the fixing ring 33. The fixing ring 33 effectively reinforces the distributing plate 32 and provides space for fixing the auxiliary paddle 34. The auxiliary paddle 34 cuts and disperses the material at the edge of the mixing tank 1, and the push plate 341 increases the inertial force of the powder hitting the inner wall of the mixing tank 1. The directional paddle 4's directional section 421 serves only to agitate the material. Its inclined design allows it to contact the material that falls back down after hitting the inner wall of the mixing tank 1 due to inertia, pushing the contacted material towards the guide block 12. This allows more material to contact the guide block 12 and be guided towards the interceptor plate 133 via the inclined surface of the guide block 12. After contacting the interceptor plate 133, the material falls directly into the central area of the mixing tank 1. This improves the circumferential convection capacity of the material being agitated in the mixing tank 1, and also allows for preliminary mixing of the modified additive with the material falling towards the interceptor plate 133 during the falling process. Furthermore, it increases the amount of material in the central part of the mixing tank 1, enhancing material flow and circulation.
[0033] The implementation principle of the stirring paddle and mineral powder modification device in this application embodiment is as follows: After the mineral powder is put into the mixing tank 1, the motor drives the stirring paddle to rotate through the rotating shaft 11. The dispersing paddle 2 mixes the powder at the bottom of the mixing tank 1 and pushes the powder near the stirring shaft at the bottom of the mixing tank 1 upwards to the area of the upward-distributing plate 32 via the guide plate 221. At the mixing paddle 3, the distributing plate 32 pushes the contacted powder upwards and outwards. In the auxiliary paddle 34, the push plate 341 can increase the amount of powder moving towards the inner wall of the mixing tank 1 and the pressure when in contact with the inner wall of the mixing tank 1, so that more powder can flow upwards in a spiral motion at the edge of the mixing tank 1. At the directional paddle 4, the directional part 421 continues to push the contacted powder upwards. After contacting the guide block 12, the powder will contact the intercepting plate 133 under the action of inertia, and then fall naturally. This process not only improves the axial convection capacity of the powder during mixing in the mixing tank 1, but also allows the modified additives falling through the feed cylinder 131 to make initial contact with the powder. Due to the interception effect of the baffle plate 133, the amount of powder near the mixing shaft in the mixing tank 1 increases, allowing the modified additives falling from the center to be mixed with more powder and added to the mixing material flow. Compared to traditional mineral powder mixing tanks 1, even if the modified additives melt during the falling process, they will still mix with the axially convection mineral powder, further improving the mixing effect of the modified additives and other additives with the mineral powder.
[0034] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A stirring paddle, characterized in that: include Rotating shaft (11); The bulk material paddle (2) includes a bottom ring (21) and a bottom plate (22). The bottom ring (21) is mounted on a rotating shaft (11), and there are multiple bottom plates (22) fixed on the circumferential outer wall of the bottom ring (21). The mixing paddle (3) is located above the bulk paddle (2) and includes a central ring (31), a distributing plate (32), a fixed ring (33), and an auxiliary paddle (34). The central ring (31) is mounted on the rotating shaft (11). There are multiple distributing plates (32) that are circumferentially distributed and fixed on the outer circumferential wall of the central ring (31). The fixed ring (33) is fixed to the end of the distributing plate (32) away from the central ring (31). The auxiliary paddle (34) is fixed on the outer circumferential wall of the fixed ring (33). The distributing plates (32) are all inclined. As the rotating shaft (11) rotates, the upper surface of the distributing plate (32) can push the material it contacts upward. The thickness of the part of the auxiliary paddle (34) closer to the rotation direction of the rotating shaft (11) is smaller. The directional paddle (4) is located above the mixing paddle (3) and includes a top ring (41) and a directional plate (42). The top ring (41) is mounted on the rotating shaft (11). There are multiple directional plates (42) fixed on the circumferential outer wall of the top ring (41). The directional plates (42) are inclined upward from the top ring (41) and then bent upward.
2. The stirring paddle according to claim 1, characterized in that: A pusher plate (341) is fixed at one end of the auxiliary propeller (34) away from the central ring (31). The pusher plate (341) is inclined upward and pushes the material it contacts away from the rotating shaft (11) and upward as the rotating shaft (11) rotates.
3. The stirring paddle according to claim 1, characterized in that: An upwardly inclined guide plate (221) is fixed on the side of the base plate (22) away from the rotation direction of the rotating shaft (11), and the guide plate (221) is located directly below the rotation area of the separating plate (32).
4. The stirring paddle according to claim 1, characterized in that: The two ends of the splitter (32) are twisted, and the end closer to the middle ring (31) is closer to the vertical state than the end closer to the fixed ring (33).
5. The stirring paddle according to claim 1, characterized in that: The upward-bent portion of the directional plate (42) is the directional part (421), and the portion of the directional part (421) that is away from the rotation direction of the rotation axis (11) is bent upward.
6. The stirring paddle according to claim 5, characterized in that: The bending portion of the directional part (421) gradually increases in the direction away from the top ring (41).
7. A mineral powder modification device, comprising the stirring paddle as described in any one of claims 1-6, characterized in that: Also includes The mixing tank (1) has a rotating shaft (11) driven by a motor at the bottom, and the stirring paddle is mounted on the rotating shaft (11); The guide block (12) is set at the top of the inner wall of the mixing tank (1). In the rotation direction of the rotating shaft (11), the guide block (12) gradually thickens. The guide block (12) gradually thickens from the bottom to the top. The guide block (12) is located above the directional paddle (4). The top cover (13) is installed on the top of the mixing tank (1) to seal the mixing tank (1). A discharge cylinder (131) is provided, and the bottom of the discharge cylinder (131) is connected to the mixing tank (1) through the top cover (13).
8. A mineral powder modification device according to claim 7, characterized in that: The inner diameter of the mixing tank (1) is D1, and the distance L1 from the end of the bulk material paddle (2) to the center of the rotating shaft (11) is in the range of: 0.3D1≤L1≤0.38D1; The range of the inner diameter D2 of the fixed ring (33) is: 0.28D1≤D2≤0.3D1; The maximum distance L2 between the auxiliary propeller (34) and the rotation shaft (11) is in the range of: 0.4D1≤L2≤0.46D1; The range of the farthest distance L3 between the directional plate (42) and the rotation axis (11) is: 0.32D1≤L3≤0.36D1.
9. A mineral powder modification device according to claim 8, characterized in that: The distance L4 between the center of the guide block (12) and the top of the directional plate (42) is: 0.07D1≤L4≤0.12D1.
10. A mineral powder modification device according to any one of claims 7-9, characterized in that: An extension rod (132) is fixed at the bottom of the top cover (13), and an interceptor plate (133) is fixed at the bottom end of the extension rod (132). The interceptor plate (133) is located opposite to the guide block (12).