A high efficiency vertical lifting type mixing machine and a method of use

Abstract

The application provides a high-efficiency vertical lifting type stirring mixer and a use method, relates to the field of stirring mixing equipment, and comprises a U-shaped base. Two sides of the top of the U-shaped base are respectively fixed with a rack column and a sliding rail column. The top of the rack column and the sliding rail column is fixed with a top frame. The head of the top frame is rotatably installed with a stirring main shaft through a bearing seat. The top end of the stirring main shaft is connected with a stirring power device. The bottom end of the stirring main shaft is installed with a three-arm stirring frame. The three-arm stirring frame is installed with a stirring paddle assembly for stirring. The sliding rail column is slidably installed with a lifting support. The lifting support and the U-shaped base are installed with a lifting power device. The lifting support is used for positioning and placing a stirring cylinder. The stirring cylinder is located directly below the stirring paddle assembly. The mixer can be used for stirring concrete raw materials in the process of small-batch concrete test block production. Automatic stirring paddles are adopted to realize sufficient stirring of the concrete.

Description

Technical Field

[0001] This invention relates to the field of concrete specimen preparation technology, and in particular to a high-efficiency vertical lifting mixer and its usage method. Background Technology

[0002] Before mass-producing concrete, ready-mixed concrete manufacturers need to prepare concrete test blocks to test the concrete's performance and determine if it meets the required strength. This also allows for the preservation of these test blocks for subsequent quality control. The preparation process involves small-batch mixing of the concrete. Current methods primarily involve manually adding raw materials to a mixing drum and then using a hand mixer. This manual mixing process cannot guarantee uniform mixing, thus compromising the quality of the final concrete test blocks. Furthermore, it is time-consuming and labor-intensive. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a high-efficiency vertical lifting mixer and its usage method. This mixer can be used for mixing concrete raw materials in the process of making small batches of concrete test blocks. It adopts automatic mixing blades to achieve full mixing of concrete, replacing the traditional hand mixing process, which can improve the uniformity and effect of mixing and effectively improve the mixing efficiency. Moreover, the mixing drum adopts a detachable lifting structure, which can be removed after preparation to facilitate the removal of concrete, thereby realizing the casting and preparation of concrete test blocks.

[0004] To achieve the above-mentioned technical features, the present invention aims to provide a high-efficiency vertical lifting mixer, comprising a U-shaped base. A frame column and a slide rail column are fixed to the top two sides of the U-shaped base, respectively. A top frame is fixed to the top of the frame column and the slide rail column. A stirring shaft is rotatably mounted on the bottom end of the top frame via a bearing seat. The top end of the stirring shaft is connected to a stirring power device. A three-arm stirring frame is mounted on the bottom end of the stirring shaft, and a stirring paddle assembly for stirring is mounted on the three-arm stirring frame. A lifting support is slidably mounted on the slide rail column. A lifting power device is installed between the lifting support and the U-shaped base. The lifting support is used to position and place a stirring cylinder, which is located directly below the stirring paddle assembly.

[0005] Preferably, the bottom four corners of the U-shaped base are fixed with support feet for height adjustment.

[0006] Preferably, a reinforcing plate is fixed between the frame column and the slide rail column.

[0007] Preferably, the U-shaped base has protective plates on both sides of the U-shaped opening.

[0008] Preferably, the stirring power device includes a motor mounted at the top of the top frame, the output shaft of the motor being connected to a reducer, the reducer being fixed at the top of the top frame, and the output end of the reducer being connected to the stirring main shaft.

[0009] Preferably, the lifting support is slidably mounted on the slide rail via a slider, and the slide rail is fixed to the outer wall of the slide rail column; the top of the lifting support is provided with a positioning column for positioning the support plates on both sides of the mixing drum.

[0010] Preferably, the lifting power device includes a cylinder body fixed on a U-shaped base, the piston rod end of the cylinder body is fixedly connected to a connecting seat, and the connecting seat is fixedly connected to the top end of the lifting support.

[0011] Preferably, the impeller assembly includes a first spindle seat fixed to the end of the first arm of the three-arm impeller frame, on which a first impeller shaft is fixedly mounted; it also includes a second spindle seat fixed to the end of the second arm of the three-arm impeller frame, on which a second impeller shaft is fixedly mounted; it also includes a third spindle seat fixed to the end of the third arm of the three-arm impeller frame, on which an L-shaped impeller shaft is rotatably mounted; and impeller blades are fixed on the first impeller shaft, the second impeller shaft, and the L-shaped impeller shaft.

[0012] Preferably, the L-shaped stirring shaft is connected to a self-rotating mechanism, which includes a first sprocket fixed to the top of the L-shaped stirring shaft. The first sprocket is driven by a chain meshing with a second sprocket. The second sprocket is fixed to the bottom of the sprocket seat, which is fixed to the bottom of the top frame. The top frame is fitted outside the stirring main shaft and bearing seat. The L-shaped stirring shaft is rotatably mounted inside the third main shaft seat via bearings.

[0013] Another aspect of the present invention provides a method of using a high-efficiency vertical lifting mixer, comprising the following steps: S1. Place the mixing drum on top of the lifting support, align the support plates on both sides of the mixing drum and fit them into the positioning pins on the lifting support to complete the positioning and installation of the mixing drum. S2. Add the raw materials to be mixed into the positioned mixing drum according to the proportion; S3. Start the lifting power device. The cylinder drives the piston rod to extend upward. Through the connecting seat, the lifting support slides upward along the slide rail, so that the mixing drum rises to the mixing working position. At this time, the three-arm mixing frame and the mixing paddle assembly are fully inserted into the mixing drum. S4. Start the stirring power unit. After the motor is reduced in speed by the reducer, it drives the stirring main shaft to rotate, which in turn drives the three-arm stirring frame to revolve around the axis of the stirring main shaft. At the same time, the L-shaped stirring shaft rotates around its own axis under the drive of the self-rotating mechanism. The first stirring shaft and the second stirring shaft revolve with the three-arm stirring frame. The stirring blades on the three shafts work together to carry out all-round three-dimensional stirring and mixing of the raw materials in the stirring drum. S5. After the raw materials are mixed evenly, turn off the stirring power device to stop the stirring shaft and stirring paddle assembly from rotating. S6. Reverse start of lifting power device, piston rod retracts downward, driving lifting support and mixing drum down to the initial position, so that the mixing paddle assembly is completely separated from the mixing drum; S7. Remove the mixing drum from the lifting support and pour out the well-mixed material for subsequent preparation. S8. Clean the remaining raw materials from the mixing paddle assembly, mixing drum, and equipment surface to complete this operation.

[0014] The present invention has the following beneficial effects: 1. This invention adopts a composite mixing mode of revolution and rotation. The first and second mixing shafts revolve with the three-arm mixing frame to cover the entire mixing area, while the L-shaped mixing shaft rotates simultaneously to generate a strong shearing effect. This effectively eliminates the bottom and side wall mixing dead corners that exist in traditional mixing methods, improves the homogeneity of the raw material mixture, and ensures the consistency and reliability of the concrete test block strength.

[0015] 2. Automated mechanical mixing completely replaces manual hand mixing, reducing the mixing time per batch from 10-15 minutes to 3-5 minutes, and can operate continuously. The labor intensity of operators is reduced by more than 80%, which can meet the daily needs of commercial concrete companies for large-scale test block preparation.

[0016] 3. The lifting and detachable mixing drum structure enables automatic lifting and positioning of the drum. After mixing, the drum can be directly removed for material pouring, eliminating the need for manual handling of heavy mixing equipment. The mixing drum is precisely positioned by positioning columns, and with the protective plates on both sides of the U-shaped base, it effectively prevents the drum from shifting and tipping over and material from splashing during mixing, thus improving operational safety.

[0017] 4. The machine adopts a gantry frame structure with a U-shaped base, frame columns, and slide rail columns. Reinforcing plates are added between the columns to enhance the overall rigidity, resulting in low vibration and low noise during operation. The core transmission components adopt sprocket and chain drive, which is simple in structure, reliable in transmission, adaptable to the harsh working conditions of concrete mixing, and has a long service life.

[0018] 5. The agitator blades are detachable bolted connections, allowing for individual replacement after wear without replacing the entire agitator shaft; all wear parts are standard parts, making procurement and replacement convenient and significantly reducing long-term maintenance costs.

[0019] 6. This method can also be used in food and chemical industries where material mixing and stirring are required. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a three-dimensional view from the first perspective of the present invention.

[0022] Figure 2 This is a three-dimensional view from the second perspective of the present invention.

[0023] Figure 3 This is a three-dimensional view from the third perspective of the present invention.

[0024] Figure 4 This is a three-dimensional view from the fourth perspective of the present invention.

[0025] Figure 5 This is a three-dimensional view from the fifth perspective of the present invention.

[0026] Figure 6 This is a six-view 3D diagram of the present invention.

[0027] Figure 7 This is a top view of the present invention.

[0028] Figure 8 For the present invention Figure 7 AA view.

[0029] In the diagram: 1. Support foot; 2. U-shaped base; 3. Protective plate; 4. Cylinder body; 5. Slide rail; 6. Slider; 7. Lifting support; 8. Slide rail column; 9. Frame column; 10. Connecting seat; 11. Top frame; 12. Motor; 13. Reducer; 14. Bearing seat; 15. Sprocket seat; 16. Three-arm stirring frame; 17. Second sprocket; 18. First sprocket; 19. Chain; 20. Third spindle seat; 21. L-shaped stirring shaft; 22. Stirring cylinder; 23. Support plate; 24. Positioning column; 25. First spindle seat; 26. Second spindle seat; 27. Second stirring shaft; 28. Piston rod; 29. ​​Stirring main shaft; 30. Stirring blade; 31. Bearing; 32. Reinforcing plate; 33. Detailed Implementation

[0030] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0031] Example 1: See Figure 1-8A high-efficiency vertical lifting mixer includes a U-shaped base 2. A frame column 9 and a slide rail column 8 are fixed to the top two sides of the U-shaped base 2, respectively. A top frame 11 is fixed to the top of the frame column 9 and the slide rail column 8. A stirring shaft 30 is rotatably mounted on the front bottom end of the top frame 11 via a bearing seat 14. The top end of the stirring shaft 30 is connected to a stirring power device. A three-arm stirring frame 16 is mounted on the bottom end of the stirring shaft 30, and a stirring paddle assembly is mounted on the three-arm stirring frame 16. A lifting support 7 is slidably mounted on the slide rail column 8. A lifting power device is installed between the lifting support 7 and the U-shaped base 2. The lifting support 7 is used to position and place a stirring cylinder 22, which is located directly below the stirring paddle assembly. This mixer can be used for mixing concrete raw materials in the process of making small batches of concrete test blocks. It uses automatic mixing blades to achieve thorough mixing of concrete, replacing the traditional hand mixing process. This can improve the uniformity and effect of mixing, effectively improving the mixing efficiency. Moreover, the mixing drum adopts a detachable lifting structure, which can be removed after preparation to facilitate the removal of concrete, thereby realizing the casting and preparation of concrete test blocks.

[0032] Furthermore, to address the issue of equipment tilting and excessive vibration caused by uneven ground, and to ensure the levelness and stability of the mixing process, the bottom four corners of the U-shaped base 2 are fixed with height-adjustable support feet 1. The support feet adopt a standard threaded adjustment structure, allowing individual adjustment of the height of each foot to quickly level the equipment, effectively reducing vibration and noise during operation.

[0033] Furthermore, to enhance the lateral torsional rigidity of the double-column frame, prevent the columns from swaying and deforming during mixing, and improve the reliability of equipment operation, a reinforcing plate 33 is fixed between the frame column 9 and the slide rail column 8. The reinforcing plate is made of steel plate welded and fixed between the two columns to form a stable structure, further improving the overall torsional load-bearing capacity of the frame and extending the service life of the equipment.

[0034] Furthermore, to protect the lifting power device at the opening of the U-shaped base, prevent personnel from accidentally touching the transmission components, and block materials splashing during the mixing process, protective plates 3 are provided on both sides of the U-shaped opening of the U-shaped base 2. The protective plates are fixed by welding, which is simple in structure, convenient in installation and maintenance, and ensures operational safety without affecting the normal operation of the lifting mechanism.

[0035] Furthermore, to provide a stable high-torque power output for the mixing operation and meet the low-speed, high-torque requirements for concrete raw material mixing, the mixing power device includes a motor 12 mounted at the top of the top frame 11. The output shaft of the motor 12 is connected to the input end of a reducer 13, which is fixed to the top of the top frame 11. The output end of the reducer 13 is connected to the mixing main shaft 30. During operation, the high-speed power output from the motor is reduced and amplified by the reducer, driving the mixing main shaft to rotate smoothly at a low speed. This results in high power transmission efficiency, low operating noise, and the ability to operate continuously for extended periods.

[0036] Furthermore, to ensure the lifting support slides smoothly in the vertical direction and achieves precise positioning of the mixing drum, preventing the drum from shifting or tipping over during mixing, the lifting support 7 is slidably mounted on the slide rail 5 via a slider 6. The slide rail 5 is vertically fixed to the outer wall of the slide rail column 8. The top of the lifting support 7 is equipped with positioning posts 24 for positioning the support plates 23 on both sides of the mixing drum 22. The slider and slide rail are precisely fitted with a clearance fit, ensuring smooth lifting without jamming. The positioning posts precisely fit with the positioning holes on the support plates on both sides of the mixing drum, achieving dual circumferential and radial positioning of the mixing drum, preventing shaking during mixing.

[0037] Furthermore, to provide sufficient thrust for the vertical movement of the lifting support, ensuring a smooth and controllable lifting process for the mixing drum and meeting the load-bearing requirements of a fully loaded mixing drum, the lifting power device includes a cylinder 4 fixed on a U-shaped base 2. The piston rod 29 of the cylinder 4 is fixedly connected to a connecting seat 10, which is fixedly connected to the top of the lifting support 7. During operation, the cylinder drives the piston rod to extend and retract, which in turn drives the lifting support to move vertically up and down along the slide rail via the connecting seat. This provides high thrust, smooth operation, and precise control over the lifting height and speed of the mixing drum.

[0038] Furthermore, to create a comprehensive three-dimensional mixing flow field covering the entire internal space of the mixing drum and eliminating the dead zones present in traditional mixing methods, the mixing paddle assembly includes a first main shaft seat 25 fixed to the end of the first arm of the three-arm mixing frame 16, on which a first mixing shaft 26 is fixedly mounted; a second main shaft seat 27 fixed to the end of the second arm of the three-arm mixing frame 16, on which a second mixing shaft 28 is fixedly mounted; and a third main shaft seat 20 fixed to the end of the third arm of the three-arm mixing frame 16, on which an L-shaped mixing shaft 21 is rotatably mounted; mixing blades 31 are fixed on the first mixing shaft 26, the second mixing shaft 28, and the L-shaped mixing shaft 21. The three mixing shafts are evenly distributed along the circumference and can cover the entire cross-sectional area of ​​the mixing drum as the three-arm mixing frame revolves. The synergistic effect of multiple sets of mixing blades significantly improves mixing efficiency and uniformity.

[0039] Furthermore, to enhance the shearing and disturbance effects during the mixing process and address the issues of insufficient mixing intensity from simple revolution and the potential for dead zones at the bottom and sidewalls of the drum, the L-shaped mixing shaft 21 is connected to a self-rotating mechanism. This mechanism includes a first sprocket 18 fixed to the top of the L-shaped mixing shaft 21. The first sprocket 18 is driven by a chain 19 meshing with a second sprocket 17. The second sprocket 17 is fixed to the bottom of a sprocket seat 15, which is fixed to the bottom of a top frame 11. The top frame 11 is fitted onto the outside of the mixing main shaft 30 and bearing seat 14. The L-shaped mixing shaft 21 is rotatably mounted inside a third main shaft seat 20 via a bearing 32. During operation, the second sprocket remains stationary with the top frame. As the three-arm mixing frame revolves, it drives the chain to rotate around the stationary second sprocket, thereby driving the first sprocket and the L-shaped mixing shaft to rotate. This eliminates the need for an additional power source, resulting in a simple and compact structure that significantly improves the homogeneity of the concrete mixture.

[0040] Working principle of the invention: This equipment achieves automatic alignment and separation of the mixing drum through a lifting system, and achieves efficient and uniform mixing of concrete raw materials through a composite mixing mechanism of revolution and rotation.

[0041] The lifting system uses cylinder 4 as the power source. The extension and retraction of piston rod 29 drives connecting seat 10 and lifting support 7 to move vertically and linearly along slide rail 5 on slide rail column 8, thereby driving the mixing drum 22 to rise and fall: when it rises to the working position, the mixing paddle assembly is fully inserted into the mixing drum 22 to carry out mixing operations; when it falls to the initial position, the mixing paddle assembly is completely separated from the mixing drum 22, which facilitates the picking up and putting down of the mixing drum and the dumping of materials.

[0042] The mixing system adopts a dual-power composite transmission mode: the main drive is driven by the motor 12 through the reducer 13 to drive the mixing main shaft 30 to rotate, which drives the three-arm mixing frame 16 and all the mixing shafts installed on it to revolve around the axis of the mixing main shaft 30, covering the entire cross-sectional area of ​​the mixing drum 22; the self-rotation transmission adopts a fixed-axis sprocket mechanism, the second sprocket 17 fixed at the bottom of the top frame 11 remains stationary, when the three-arm mixing frame 16 revolves, it drives the first sprocket 18 to rotate through the chain 19, which in turn drives the L-shaped mixing shaft 21 to rotate around its own axis, generating additional shearing and disturbance effects, which, together with the other two fixed revolving mixing shafts, form an all-round three-dimensional mixing flow field.

[0043] The specific working process of this invention: The complete working process of this high-efficiency vertical lifting mixer is as follows: Equipment debugging and preparation: Adjust the equipment to a horizontal position by adjusting the support feet 1 at the bottom of the U-shaped base 2, check the operating status of power components such as cylinder 4 and motor 12, and confirm that all transmission connections are reliable.

[0044] Positioning and installation of the mixing drum: Place the empty mixing drum 22 on the top platform of the lifting support 7, align the positioning holes on the support plates 23 on both sides of the mixing drum 22 with the positioning posts 24 on the lifting support 7 and insert them downwards to complete the circumferential and radial positioning of the mixing drum 22 and prevent shaking during the mixing process.

[0045] Raw material input: According to the concrete mix proportion requirements, cement, sand, water and admixtures are added to the mixing drum 22 in sequence.

[0046] Mixing drum lifting position: Start the lifting power device, the piston rod 29 of the cylinder 4 extends upward, and drives the lifting support 7 to rise at a constant speed along the slide rail 5 through the connecting seat 10 until the mixing drum 22 reaches the preset mixing working position. At this time, the three-arm mixing frame 16 and all the mixing blades 31 are completely immersed in the raw material, and the mixing blades 31 maintain a safe gap with the inner wall and bottom of the mixing drum 22.

[0047] Mixing operation: Start the mixing power unit. The power output of motor 12 is reduced and increased in torque by reducer 13, and drives the mixing main shaft 30 to rotate at a set speed, which drives the three-arm mixing frame 16 to revolve. At the same time, the L-shaped mixing shaft 21 rotates under the drive of the sprocket and chain mechanism. The mixing blades 31 on the three mixing shafts work together to shear, tumble and mix the raw materials, so that cement, sand and gravel and water come into full contact to form a uniform concrete mixture.

[0048] Stirring Stop and Lowering: After the preset stirring time is reached, the stirring power device is turned off, and the stirring main shaft 30 and stirring paddle assembly gradually stop rotating; the lifting power device is started in the opposite direction, the piston rod 29 retracts downward, and the lifting support 7 and stirring cylinder 22 slowly descend to the initial position, so that the stirring paddle assembly is completely separated from the stirring cylinder 22.

[0049] Finished product removal and equipment cleaning: Remove the mixing drum 22 from the lifting support 7 and pour out the well-mixed concrete mixture inside for the casting and molding of concrete test blocks; then clean the mixing blades 31, the inner wall of the mixing drum 22 and the surface of the equipment to remove any remaining concrete material, thus completing this work cycle.

[0050] Example 2: Another aspect of the present invention provides a method of using a high-efficiency vertical lifting mixer, comprising the following steps: S1. Place the mixing drum 22 on top of the lifting support 7, align the support plates 23 on both sides of the mixing drum 22 and fit them into the positioning posts 24 on the lifting support 7 to complete the positioning and installation of the mixing drum 22. S2. Add the raw materials to be mixed into the positioned mixing drum 22 according to the proportion; S3. Start the lifting power device. The cylinder 4 drives the piston rod 29 to extend upward. Through the connecting seat 10, the lifting support 7 slides upward along the slide rail 5, so that the mixing drum 22 rises to the mixing working position. At this time, the three-arm mixing frame 16 and the mixing paddle assembly are fully inserted into the mixing drum 22. S4. Start the stirring power device. After the motor 12 is reduced by the reducer 13, it drives the stirring main shaft 30 to rotate, which drives the three-arm stirring frame 16 to revolve around the axis of the stirring main shaft 30. At the same time, the L-shaped stirring shaft 21 rotates around its own axis under the drive of the self-rotation mechanism. The first stirring shaft 26 and the second stirring shaft 28 revolve with the three-arm stirring frame 16. The stirring blades 31 on the three shafts work together to carry out all-round three-dimensional stirring and mixing of the raw materials in the stirring drum 22. S5. After the raw materials are mixed evenly, turn off the stirring power device to stop the stirring main shaft 30 and the stirring paddle assembly from rotating. S6. Reverse start of lifting power device, piston rod 29 retracts downward, driving lifting support 7 and stirring drum 22 down to the initial position, so that stirring paddle assembly is completely separated from stirring drum 22. S7. Remove the mixing drum 22 from the lifting support 7 and pour out the well-mixed material for subsequent preparation. S8. Clean the agitator assembly, agitator drum 22, and any remaining raw materials on the equipment surface to complete this operation.

Claims

1. A high-efficiency vertical lifting mixing machine, characterized in that, The system includes a U-shaped base (2), on which frame columns (9) and slide rail columns (8) are fixed on the top two sides respectively. A top frame (11) is fixed on the top of the frame columns (9) and slide rail columns (8). A stirring spindle (30) is rotatably installed at the bottom of the head of the top frame (11) through a bearing seat (14). The top of the stirring spindle (30) is connected to a stirring power device. A three-arm stirring frame (16) is installed at the bottom of the stirring spindle (30). A stirring paddle assembly for stirring is installed on the three-arm stirring frame (16). A lifting support (7) is slidably installed on the slide rail column (8). A lifting power device is installed between the lifting support (7) and the U-shaped base (2). The lifting support (7) is used to position and place the stirring cylinder (22). The stirring cylinder (22) is located directly below the stirring paddle assembly.

2. The high-efficiency vertical lifting mixer according to claim 1, characterized in that: The bottom four corners of the U-shaped base (2) are fixed with support feet (1) for height adjustment.

3. The high-efficiency vertical lifting mixer according to claim 1, characterized in that: A reinforcing plate (33) is fixed between the frame column (9) and the slide rail column (8).

4. The high-efficiency vertical lifting mixer according to claim 1, characterized in that: The U-shaped base (2) has protective plates (3) on both sides of the U-shaped opening.

5. The high-efficiency vertical lifting mixer according to claim 1, characterized in that: The stirring power device includes a motor (12) installed at the top of the top frame (11). The output shaft of the motor (12) is connected to a reducer (13). The reducer (13) is fixed at the top of the top frame (11). The output end of the reducer (13) is connected to the stirring main shaft (30).

6. The high-efficiency vertical lifting mixer according to claim 1, characterized in that: The lifting support (7) is slidably mounted on the slide rail (5) via the slider (6), and the slide rail (5) is fixed on the outer wall of the slide rail column (8); the top of the lifting support (7) is provided with a positioning column (24) for positioning the support plates (23) on both sides of the mixing drum (22).

7. The high-efficiency vertical lifting mixer according to claim 1, characterized in that: The lifting power device includes a cylinder (4) fixed on a U-shaped base (2), the end of the piston rod (29) of the cylinder (4) is fixedly connected to the connecting seat (10), and the connecting seat (10) is fixedly connected to the top of the lifting support (7).

8. The high-efficiency vertical lifting mixer according to claim 1, characterized in that: The stirring paddle assembly includes a first spindle seat (25) fixed to the end of the first arm of the three-arm stirring frame (16), on which a first stirring shaft (26) is fixedly mounted; it also includes a second spindle seat (27) fixed to the end of the second arm of the three-arm stirring frame (16), on which a second stirring shaft (28) is fixedly mounted; it also includes a third spindle seat (20) fixed to the end of the third arm of the three-arm stirring frame (16), on which an L-shaped stirring shaft (21) is rotatably mounted; stirring blades (31) are fixed on the first stirring shaft (26), the second stirring shaft (28) and the L-shaped stirring shaft (21).

9. The high-efficiency vertical lifting mixer according to claim 8, characterized in that: The L-shaped stirring shaft (21) is connected to a self-rotating mechanism, which includes a first sprocket (18) fixed on the top of the L-shaped stirring shaft (21). The first sprocket (18) is driven by a chain (19) meshing with a second sprocket (17). The second sprocket (17) is fixed at the bottom of a sprocket seat (15). The sprocket seat (15) is fixed at the bottom of a top frame (11). The top frame (11) is fitted on the outside of the stirring main shaft (30) and the bearing seat (14). The L-shaped stirring shaft (21) is rotatably mounted inside a third main shaft seat (20) via a bearing (32).

10. The method of using the high-efficiency vertical lifting mixer according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Place the mixing drum (22) on the top of the lifting support (7), align the support plates (23) on both sides of the mixing drum (22) and fit them into the positioning pins (24) on the lifting support (7) to complete the positioning and installation of the mixing drum (22); S2. Add the raw materials to be stirred into the positioned mixing drum (22) according to the proportion; S3. Start the lifting power device. The cylinder (4) drives the piston rod (29) to extend upward. Through the connecting seat (10), the lifting support (7) slides upward along the slide rail (5), so that the mixing drum (22) rises to the mixing working position. At this time, the three-arm mixing frame (16) and the mixing paddle assembly are fully inserted into the mixing drum (22). S4. Start the stirring power device. The motor (12) drives the stirring main shaft (30) to rotate after being reduced by the reducer (13), which in turn drives the three-arm stirring frame (16) to revolve around the axis of the stirring main shaft (30). At the same time, the L-shaped stirring shaft (21) rotates around its own axis under the drive of the self-rotation mechanism. The first stirring shaft (26) and the second stirring shaft (28) revolve with the three-arm stirring frame (16). The stirring blades (31) on the three shafts work together to carry out all-round three-dimensional stirring and mixing of the raw materials in the stirring drum (22). S5. After the raw materials are evenly mixed, turn off the stirring power device to stop the stirring main shaft (30) and stirring paddle assembly from rotating. S6. Reverse start of lifting power device, piston rod (29) retracts downward, driving lifting support (7) and stirring drum (22) down to the initial position, so that stirring paddle assembly is completely separated from stirring drum (22). S7. Remove the mixing drum (22) from the lifting support (7) and pour out the well-mixed material for subsequent preparation. S8. Clean the mixing paddle assembly, mixing drum (22) and the surface of the equipment of any remaining raw materials to complete this operation.

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