Vertical mixing device

Abstract

The application provides a vertical mixing device, which comprises a fixed frame body, a mixing tank, a turnover assembly and a stirring assembly. The mixing tank has a mixing cavity, the bottom of the mixing tank has a conical structure, and a discharge port is arranged at the bottom end of the conical structure. The turnover assembly is arranged correspondingly to the conical structure. The turnover assembly has a forward rotation state and a reverse rotation state. The stirring assembly is arranged in the mixing cavity and connected with the turnover assembly. The stirring assembly is located above the conical structure and can rotate synchronously with the turnover assembly when the turnover assembly is in the forward rotation state, so as to mix and stir the materials above the conical structure. The vertical mixing device provided by the application can turn over the accumulated raw materials at the conical structure, avoid the accumulation of raw materials at the conical structure, thereby ensuring the mixing effect of the raw materials, and can also ensure stable discharging effect, and has high practicability.

Description

Technical Field

[0001] This invention belongs to the field of mixing equipment technology, and specifically relates to a vertical mixing device. Background Technology

[0002] Baseboards play a role in visual balance. Their linear shape, material, and color create a harmonious interplay within a room, resulting in a pleasing aesthetic effect. As the quality requirements for decorative items increase, environmentally friendly and pollution-free wood-plastic composite (bamboo fiber) baseboards are becoming increasingly widespread. The preparation of wood-plastic composite baseboards involves an extruder; resin, wood powder, and other powdered raw materials need to be thoroughly mixed before being added to the extruder.

[0003] In existing technologies, vertical mixing tanks are typically used for mixing raw materials for skirting boards. These tanks agitate the raw materials after addition, and a discharge port at the bottom connects to an extruder, allowing the mixed materials to be fed into the extruder. The bottom of these tanks usually features a conical structure, or necking, to guide the material towards the discharge port and ensure complete discharge. However, because vertical mixing tanks have a mixing function, the raw materials inside are compacted (accumulated) at the conical structure (especially at the bottom) due to gravity and agitation. This compacted material cannot be reached by the agitation structure, creating a blind spot that prevents mixing and affects the mixing effect. Furthermore, it can obstruct subsequent feeding, resulting in poor practicality. Summary of the Invention

[0004] This invention provides a vertical mixing device, which aims to solve the problem of poor practicality caused by poor mixing effect in existing vertical mixing tanks.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a vertical mixing device, comprising:

[0006] Fixed frame;

[0007] A mixing tank, fixed on the frame, has a mixing chamber, and the bottom of the mixing tank has a conical structure, with a discharge port at the bottom end of the conical structure;

[0008] A turning component is rotatably disposed in the mixing chamber with its rotation axis arranged vertically. The turning component is correspondingly disposed to the conical structure. The turning component has a forward rotation state and a reverse rotation state. When the turning component is in the forward rotation state, it turns the raw material in the conical structure upward. When the turning component is in the reverse rotation state, it pushes the raw material in the cone to the discharge port.

[0009] A stirring assembly is disposed in the mixing chamber and connected to the agitation assembly. The stirring assembly is located above the conical structure and is used to rotate synchronously with the agitation assembly when the agitation assembly is in the forward rotation state, so as to mix and stir the material above the conical structure.

[0010] In one possible implementation, the mixing tank includes:

[0011] The tank body has a vertically arranged cylindrical part and a conical cylindrical part connected to the bottom end of the cylindrical part and coaxially arranged with the cylindrical part, wherein the conical cylindrical part has the conical structure;

[0012] A sealing cap is connected to the top end of the cylindrical portion, and the sealing cap, the cylindrical portion, and the conical portion together form the mixing cavity.

[0013] In one possible implementation, the tapered structure includes:

[0014] A cone has a large-diameter end and a small-diameter end, wherein the small-diameter end of the cone is located below the large-diameter end of the cone.

[0015] A material transfer pipe is located below the cone and connected to the small-diameter end of the cone. The discharge port is located on the side wall of the material transfer pipe.

[0016] In one possible implementation, the flipping component includes:

[0017] A rotating shaft is rotatably mounted on the mixing tank, and the axis of rotation is coaxial with the axis of the cone.

[0018] A tumbling and stirring structure is located in the cone and the material transfer tube and is connected to the rotating shaft. The tumbling and stirring structure is used to tumble the raw materials in the cone and the material transfer tube upward when the rotating shaft rotates in the forward direction, or to push the raw materials in the cone and the material transfer tube to the discharge port when the rotating shaft rotates in the reverse direction.

[0019] A driver, fixed at the top of the mixing tank and poweredly connected to the rotating shaft, drives the rotating shaft to rotate forward or backward.

[0020] In one possible implementation, the agitation structure includes:

[0021] A sleeve is coaxially sleeved on the rotating shaft and slidably connected to the rotating shaft along the circumference of the rotating shaft. The bottom end of the sleeve abuts against the inner wall of the bottom end of the material transfer tube and is used to rotate synchronously with the rotating shaft.

[0022] A spiral stirring blade is spirally wound around the sleeve, and the spiral stirring blade has a straight part located in the material transfer tube and a conical part located in the cone.

[0023] A retaining ring is disposed above the sleeve and fixed on the rotating shaft;

[0024] A spring is sleeved on the rotating shaft, with one end of the spring abutting against the fixed ring and the other end abutting against the sleeve.

[0025] In one possible implementation, the stirring assembly includes:

[0026] Two collars are provided, both of which are sleeved on the rotating shaft and spaced apart along the axis of the rotating shaft;

[0027] Two one-way bearings are provided, and the two one-way bearings correspond one-to-one with the two collars. Each one-way bearing has an outer ring and an inner ring. The outer ring of the one-way bearing is interference-fitted with the corresponding collar, and the inner ring of the one-way bearing is interference-fitted with the rotating shaft. The one-way bearing is used to drive the collar to rotate in the forward direction when the rotating shaft rotates in the forward direction.

[0028] At least two cantilever assemblies are provided, and each cantilever assembly is arranged annularly around the axis of the rotation shaft. Each cantilever assembly includes two cantilever rods, and the two cantilever rods are arranged in a one-to-one correspondence with the two collars. One end of each cantilever rod is fixedly connected to the corresponding collar, and the other end extends radially along the rotation shaft.

[0029] At least two mounting rods are provided, each mounting rod is provided in a one-to-one correspondence with each cantilever group, the length direction of each mounting rod is provided along the axial direction of the rotation axis, and the two ends of the mounting rod are fixedly connected to the two corresponding cantilever rods;

[0030] The mixing assembly includes at least two sets, with each mixing assembly corresponding to one of the cantilever assemblies. Each mixing assembly includes multiple mixing rods, which are spaced apart along the axis of the rotation shaft. One end of each mixing rod is fixedly connected to the corresponding mounting rod, and the other end extends toward the rotation shaft.

[0031] In one possible implementation, the stirring assembly further includes two thrust bearings, each corresponding to one of the two collars. Each thrust bearing has an outer ring and an inner ring. The outer ring of the thrust bearing is interference-fitted with the corresponding collar, and the inner ring of the thrust bearing is interference-fitted with the rotating shaft.

[0032] In one possible implementation, the rotating shaft is provided with a limiting strip, which is arranged along the axial direction of the rotating shaft; the inner wall of the sleeve is provided with a limiting groove that matches the limiting strip.

[0033] In this implementation, the agitator can adapt to the conical structure on the mixing tank. During forward rotation, it can agitate the raw materials accumulated in the conical structure upwards to ensure mixing. During reverse rotation, it can push the raw materials out through the discharge port. The stirring component rotates synchronously with the agitator during forward rotation to ensure mixing of the raw materials above the conical structure. This vertical mixing device effectively agitates the raw materials accumulated in the conical structure, preventing accumulation and ensuring good mixing. It also guarantees stable discharge and is highly practical. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of the vertical mixing device provided in an embodiment of the present invention;

[0035] Figure 2 A cross-sectional view of the mixing tank of the vertical mixing device provided in an embodiment of the present invention (with a tilting assembly and a stirring assembly).

[0036] Figure 3 A schematic diagram of the main structure of the tumbling assembly and stirring assembly of the vertical mixing device provided in an embodiment of the present invention;

[0037] Figure 4 for Figure 3 An enlarged structural schematic diagram of point A of the vertical mixing device provided in the embodiment;

[0038] Explanation of reference numerals in the attached figures:

[0039] 10. Fixed frame; 20. Mixing tank; 21. Tank body; 22. Sealing cover; 23. Conical structure; 231. Conical cylinder; 232. Feed pipe; 233. Discharge port; 30. Tilting assembly; 31. Rotating shaft; 32. Tilting and stirring structure; 321. Sleeve; 322. Spiral stirring blade; 323. Fixing ring; 324. Spring; 33. Driver; 40. Stirring assembly; 41. Collar; 42. One-way bearing; 43. Cantilever rod; 44. Mounting rod; 45. Stirring rod; 46. Thrust bearing. Detailed Implementation

[0040] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0041] Please refer to the following: Figures 1 to 4 The vertical mixing device provided by the present invention will now be described. The vertical mixing device includes a fixed frame 10, a mixing tank 20, a turning assembly 30, and a stirring assembly 40. The mixing tank 20 is fixed to the frame and has a mixing chamber. The bottom of the mixing tank 20 has a conical structure 23, and a discharge port 233 is provided at the bottom end of the conical structure 23. The turning assembly 30 is rotatably disposed in the mixing chamber, with its rotation axis arranged vertically. The turning assembly 30 is correspondingly disposed to the conical structure 23. The turning assembly 30 has a forward rotation state and a reverse rotation state. When the turning assembly 30 is in the forward rotation state, it turns the raw material in the conical structure 23 upwards. When the turning assembly 30 is in the reverse rotation state, it pushes the raw material in the conical structure to the discharge port 233. The stirring component 40 is disposed in the mixing chamber and connected to the agitation component 30. The stirring component 40 is located above the conical structure 23 and can rotate synchronously with the agitation component 30 when the agitation component 30 is in the forward rotation state, so as to mix and stir the material above the conical structure 23.

[0042] Regarding the forward and reverse rotation states of the tumbling component 30, it can be understood that the forward rotation state of the tumbling component 30 is the mixing and stirring state, while the reverse rotation state of the tumbling component 30 is the discharging state.

[0043] Compared with the prior art, the vertical mixing device provided in this embodiment has an agitation component 30 that can adapt to the conical structure 23 on the mixing tank 20. When rotating in the forward direction, it can agitate the raw materials accumulated at the conical structure 23 upwards to ensure mixing. It can also push the raw materials when rotating in the reverse direction to allow them to be discharged through the outlet 233. The stirring component 40 rotates synchronously with the agitation component 30 when rotating in the forward direction to ensure mixing of the raw materials above the conical structure 23. The vertical mixing device provided in this embodiment can agitate the raw materials accumulated at the conical structure 23, preventing accumulation and ensuring a good mixing effect. It also ensures a stable discharge effect and is highly practical.

[0044] In some embodiments, the mixing tank 20 described above may be as follows: Figure 2 The structure shown. See also Figure 2 The mixing tank 20 includes a tank body 21 and a sealing cover 22. The tank body 21 has a vertically arranged cylindrical portion and a conical cylinder 231 portion connected to the bottom end of the cylindrical portion and coaxially arranged with it. The conical cylinder 231 portion has a conical structure 23. The sealing cover 22 is connected to the top end of the cylindrical portion, and the sealing cover 22, the cylindrical portion, and the conical cylinder 231 portion together form a mixing chamber.

[0045] The tank body 21, with its cylindrical section and conical section 231, ensures that the raw materials are concentrated at the outlet 233 and discharged, preventing material from remaining in the mixing chamber. Furthermore, the sealing cap 22 seals the tank body 21, preventing dust contamination. Preferably, the sealing cap 22 and the tank body 21 are connected by a flange. Because both the cylindrical section and the conical section 231 are hollow structures, it can be understood that their combination forms a mixing chamber. This technology is well known to those skilled in the art and will not be elaborated upon here.

[0046] In some embodiments, the tapered structure 23 described above can be adopted as follows: Figure 2 The structure shown. See also Figure 2 The conical structure 23 includes a conical cylinder 231 and a feed pipe 232. The conical cylinder 231 has a large-diameter end and a small-diameter end, with the small-diameter end located below the large-diameter end. The feed pipe 232 is located below the conical cylinder 231 and connected to the small-diameter end of the conical cylinder 231. The discharge port 233 is located on the side wall of the feed pipe 232.

[0047] The cone 231 ensures that the raw material is concentrated during the discharge process, and the inclined surface inside the cone 231 prevents the raw material from accumulating. The setting of the feed pipe 232, especially the discharge port 233 being located on the side wall of the feed pipe 232, facilitates connection with the extruder.

[0048] In this embodiment, the discharge port 233 can be connected to the extruder via an auger.

[0049] In some embodiments, the aforementioned flipping component 30 may employ, as follows: Figures 2 to 3 The structure shown. See also Figures 2 to 3 The agitation assembly 30 includes a rotating shaft 31, an agitation structure 32, and a driver 33. The rotating shaft 31 is rotatably mounted on the mixing tank 20, with its axis of rotation coaxial with the axis of the cone 231. The agitation structure 32 is located in the cone 231 and the feed pipe 232, and is connected to the rotating shaft 31. When the rotating shaft 31 rotates forward, the agitation structure 32 can agitate the raw materials in the cone 231 and the feed pipe 232 upward, or when the rotating shaft 31 rotates in the reverse direction, it can push the raw materials in the cone 231 and the feed pipe 232 to the discharge port 233. The driver 33 is fixed to the top of the mixing tank 20 and is poweredly connected to the rotating shaft 31 to drive the rotating shaft 31 to rotate forward or in the reverse direction.

[0050] The rotating shaft 31 can rotate forward or backward under the drive of the driver 33, with forward and backward rotation being the two directions of rotation for the rotating shaft 31. When the rotating shaft 31 rotates forward, the agitating structure 32 can push the raw material in the cone 231 and the feed tube 232 upward, ensuring that the raw material can move to the stirring assembly 40 and be stirred and mixed by the stirring assembly 40. At the same time, the pushing action of the agitating structure 32 also has a certain mixing effect, thus ensuring the mixing effect. When the rotating shaft 31 rotates backward, the agitating structure 32 can push the raw material downward, thus ensuring that the raw material is discharged at the discharge port 233, thus ensuring the discharge effect.

[0051] In some embodiments, the above-mentioned agitation and stirring structure 32 can be adopted as follows: Figure 2 The structure shown. See also Figure 2 The agitation structure 32 includes a sleeve 321, a spiral agitator 322, a retaining ring 323, and a spring 324. The sleeve 321 is coaxially mounted on the rotating shaft 31 and slidably connected to it along its circumference. The bottom end of the sleeve 321 abuts against the inner wall of the bottom end of the feed tube 232, allowing it to rotate synchronously with the rotating shaft 31. The spiral agitator 322 is spirally wound around the sleeve 321, and has a straight portion in the feed tube 232 and a conical portion in the conical cylinder 231. The retaining ring 323 is positioned above the sleeve 321 and fixed to the rotating shaft 31. The spring 324 is mounted on the rotating shaft 31, with one end abutting against the retaining ring 323 and the other end abutting against the sleeve 321.

[0052] A spiral stirring blade 322 is mounted on a sleeve 321, which drives the spiral stirring blade 322 to rotate synchronously with the rotating shaft 31, thereby ensuring the mixing and discharge of raw materials in the cone 231 and the conveyor pipe 232. The sleeve 321 is slidably mounted on the rotating shaft 31, with its bottom end abutting against the bottom end of the conveyor pipe 232. Through the elastic constraint of the fixing ring 323 and the spring 324, the sleeve 321 has a certain upward sliding space. This structure can prevent the raw materials from being squeezed at the bottom of the conveyor pipe 232 when the raw materials entering the conveyor pipe 232 are more than the raw materials exiting the outlet 233 during the process of the spiral stirring blade 322 pushing the raw materials downward to the outlet 233. At this time, the spiral stirring blade 322 can be pushed upward by the upward force (from the accumulated raw materials), which will drive the sleeve 321 to move upward, thereby compressing the spring 324. At the same time, it can also carry out some raw materials in the cone 231 and the conveyor pipe 232, which can effectively prevent the raw materials from clogging.

[0053] In this embodiment, to increase intelligence, a controller and a pressure sensor can be set. The pressure sensor is set between the spring 324 and the fixed ring 323. When the pressure value detected by the pressure sensor is too high, the controller can reduce the speed of the rotating shaft 31 to ensure the output effect.

[0054] In some embodiments, the stirring assembly 40 described above may employ, for example... Figures 3 to 4 The structure shown. See also Figures 3 to 4 The stirring assembly 40 includes a collar 41, a one-way bearing 42, a cantilever assembly, a mounting rod 44, and a stirring unit. Two collars 41 are provided, each sleeved on the rotating shaft 31 and spaced apart along the axis of the rotating shaft 31. Two one-way bearings 42 are provided, each corresponding to one of the two collars 41. Each one-way bearing 42 has an outer ring and an inner ring. The outer ring of the one-way bearing 42 is interference-fitted with the corresponding collar 41, and the inner ring of the one-way bearing 42 is interference-fitted with the rotating shaft 31. The one-way bearing 42 can drive the collar 41 to rotate in the forward direction when the rotating shaft 31 rotates in the forward direction. At least two cantilever assemblies are provided, each arranged annularly around the axis of the rotation shaft 31. Each cantilever assembly includes two cantilever rods 43, each corresponding to one of two collars 41. One end of each cantilever rod 43 is fixedly connected to the corresponding collar 41, and the other end extends radially along the rotation shaft 31. At least two mounting rods 44 are provided, each corresponding to one of the cantilever assemblies. The length direction of each mounting rod 44 is along the axial direction of the rotation shaft 31, and both ends of the mounting rod 44 are fixedly connected to the corresponding two cantilever rods 43. At least two stirring groups are provided, each corresponding to one of the cantilever assemblies. Each stirring group includes multiple stirring rods 45, spaced apart along the axis of the rotation shaft 31. One end of each stirring rod 45 is fixedly connected to the corresponding mounting rod 44, and the other end extends toward the rotation shaft 31.

[0055] The two collars 41 drive the cantilever rods 43 to rotate, which in turn drives the mounting rods 44 to rotate, thus balancing the force on each mounting rod 44 and ensuring the mixing effect of each stirring rod 45. This structure increases the contact area with the raw materials, thereby ensuring the mixing effect of the materials.

[0056] The one-way bearing 42 is designed to ensure that it rotates synchronously with the rotating shaft 31 when the rotating shaft 31 rotates in the forward direction, and remains stationary when the rotating shaft 31 rotates in the reverse direction. That is, the stirring component 40 remains stationary during the reverse rotation of the rotating shaft 31, and does not stir at this time, which can save power energy and ensure the discharge effect.

[0057] Additionally, it should be noted that in actual operation, after the rotating shaft 31 rotates in the reverse direction for a period of time, it can be rotated in the forward direction appropriately to avoid the accumulation of raw materials above the cone 231.

[0058] In some embodiments, the stirring assembly 40 described above may employ, for example... Figure 4 The structure shown. See also Figure 4 The stirring assembly 40 also includes two thrust bearings 46, each corresponding to one of the two collars 41. Each thrust bearing 46 has an outer ring and an inner ring. The outer ring of the thrust bearing 46 is interference-fitted with the corresponding collar 41, and the inner ring of the thrust bearing 46 is interference-fitted with the rotating shaft 31. The thrust bearings 46 mainly bear the axial force between the collars 41 and the rotating shaft 31, and can protect the one-way bearing 42. They have a simple structure, are easy to install, and are highly practical.

[0059] In some embodiments, a limiting strip is provided on the rotating shaft 31, and the limiting strip is arranged along the axial direction of the rotating shaft 31. A limiting groove adapted to the limiting strip is provided on the inner wall of the sleeve 321.

[0060] The fit between the limiting strip and the limiting groove prevents circumferential slippage between the sleeve 321 and the rotating shaft 31. Preferably, the limiting strip can be a flat key.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vertical mixing device, characterized in that, include: Fixed frame; A mixing tank, fixed on the frame, has a mixing chamber, and the bottom of the mixing tank has a conical structure, with a discharge port at the bottom end of the conical structure; A turning component is rotatably disposed in the mixing chamber with its rotation axis arranged vertically. The turning component is correspondingly disposed to the conical structure. The turning component has a forward rotation state and a reverse rotation state. When the turning component is in the forward rotation state, it turns the raw material in the conical structure upward. When the turning component is in the reverse rotation state, it pushes the raw material in the cone to the discharge port. A stirring assembly is disposed in the mixing chamber and connected to the agitation assembly. The stirring assembly is located above the conical structure and is used to rotate synchronously with the agitation assembly when the agitation assembly is in the forward rotation state, so as to mix and stir the material above the conical structure. The mixing tank includes: The tank body has a vertically arranged cylindrical part and a conical cylindrical part connected to the bottom end of the cylindrical part and coaxially arranged with the cylindrical part, wherein the conical cylindrical part has the conical structure; A sealing cap is connected to the top end of the cylindrical portion, and the sealing cap, the cylindrical portion, and the conical portion together form the mixing cavity; The conical structure includes: A cone has a large-diameter end and a small-diameter end, wherein the small-diameter end of the cone is located below the large-diameter end of the cone. A material transfer pipe is located below the cone and connected to the small-diameter end of the cone; the discharge port is located on the side wall of the material transfer pipe. The flipping component includes: A rotating shaft is rotatably mounted on the mixing tank, and the axis of rotation is coaxial with the axis of the cone. A tumbling and stirring structure is located in the cone and the material transfer tube and is connected to the rotating shaft. The tumbling and stirring structure is used to tumble the raw materials in the cone and the material transfer tube upward when the rotating shaft rotates in the forward direction, or to push the raw materials in the cone and the material transfer tube to the discharge port when the rotating shaft rotates in the reverse direction. A driver is fixed at the top of the mixing tank and is poweredly connected to the rotating shaft to drive the rotating shaft to rotate in the forward or reverse direction. The agitation and stirring structure includes: A sleeve is coaxially sleeved on the rotating shaft and slidably connected to the rotating shaft along the circumference of the rotating shaft. The bottom end of the sleeve abuts against the inner wall of the bottom end of the material transfer tube and is used to rotate synchronously with the rotating shaft. A spiral stirring blade is spirally wound around the sleeve, and the spiral stirring blade has a straight part located in the material transfer tube and a conical part located in the cone. A retaining ring is disposed above the sleeve and fixed on the rotating shaft; A spring is sleeved on the rotating shaft, with one end of the spring abutting against the fixed ring and the other end abutting against the sleeve.

2. The vertical mixing device as described in claim 1, characterized in that, The stirring assembly includes: Two collars are provided, both of which are sleeved on the rotating shaft and spaced apart along the axis of the rotating shaft; Two one-way bearings are provided, and the two one-way bearings correspond one-to-one with the two collars. Each one-way bearing has an outer ring and an inner ring. The outer ring of the one-way bearing is interference-fitted with the corresponding collar, and the inner ring of the one-way bearing is interference-fitted with the rotating shaft. The one-way bearing is used to drive the collar to rotate in the forward direction when the rotating shaft rotates in the forward direction. At least two cantilever assemblies are provided, and each cantilever assembly is arranged annularly around the axis of the rotation shaft. Each cantilever assembly includes two cantilever rods, and the two cantilever rods are arranged in a one-to-one correspondence with the two collars. One end of each cantilever rod is fixedly connected to the corresponding collar, and the other end extends radially along the rotation shaft. At least two mounting rods are provided, each mounting rod is provided in a one-to-one correspondence with each cantilever group, the length direction of each mounting rod is provided along the axial direction of the rotation axis, and the two ends of the mounting rod are fixedly connected to the two corresponding cantilever rods; The mixing assembly includes at least two sets, with each mixing assembly corresponding to one of the cantilever assemblies. Each mixing assembly includes multiple mixing rods, which are spaced apart along the axis of the rotation shaft. One end of each mixing rod is fixedly connected to the corresponding mounting rod, and the other end extends toward the rotation shaft.

3. The vertical mixing device as described in claim 2, characterized in that, The stirring assembly also includes two thrust bearings, each corresponding to one of the two collars. Each thrust bearing has an outer ring and an inner ring. The outer ring of the thrust bearing is interference-fitted with the corresponding collar, and the inner ring of the thrust bearing is interference-fitted with the rotating shaft.

4. The vertical mixing device as described in claim 1, characterized in that, The rotating shaft is provided with a limiting strip, which is arranged along the axial direction of the rotating shaft; the inner wall of the sleeve is provided with a limiting groove that matches the limiting strip.

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