Stirring device

Abstract

The utility model relates to the technical field of stirring equipment, in particular to a stirring device. Comprising a rotating shaft, an outer rotor, an inner stator and an outer housing, the inner stator is mounted on the top cover and sleeves the rotating shaft, the rotating shaft extends to the containing cavity, and the outer rotor and the outer housing are arranged in the containing cavity. One end of the rotating shaft is connected with the outer rotor, a stirring shaft of the stirring assembly is connected with the other end of the rotating shaft, the compact structure of the stirring assembly is directly driven by the outer rotor type driving motor, the stator supporting structure, the heat dissipation performance and the stirring blade layout are optimized, efficient mixing of high-viscosity liquid is achieved, and the stirring efficiency is improved. The service life of equipment is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of mixing equipment technology, and in particular to a mixing device. Background Technology

[0002] As a common piece of equipment in industrial production and laboratories, stirring devices are widely used in chemical, food processing, pharmaceutical and other fields. Their core function is to achieve uniform mixing of liquid and mass through mechanical action. Traditional stirring equipment generally uses a vertical motor, which is fixedly mounted on the top of the tank by a flange. The motor output shaft is connected to the stirring shaft through a coupling, or a side-mounted motor is used, which transmits power to the stirring shaft through a belt or gear transmission mechanism to increase torque output.

[0003] However, when using traditional vertical or side-mounted motor arrangements, conventional internal rotor motors require additional transmission mechanisms (such as couplings and gearboxes), leading to an increase in axial dimensions, which is detrimental to compact designs. Furthermore, high-viscosity liquids experience significant resistance during stirring, making it difficult for ordinary motors to provide sufficient torque, thus affecting the stirring effect. Therefore, there is an urgent need for a stirring device to solve these problems. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides a stirring device that solves the technical problems of large axial space occupation and insufficient torque in traditional stirring devices.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A stirring device, comprising:

[0007] A barrel with an opening at the top, the barrel having a cavity inside;

[0008] A top cover is provided at the upper opening of the barrel body;

[0009] A stirring assembly is centrally located within the cavity and is used to stir the liquid within the cavity.

[0010] A drive motor is mounted on the top cover. The drive motor includes a rotating shaft, an outer rotor, an inner stator, and an outer casing. The inner stator is mounted on the top cover and sleeved on the rotating shaft. The rotating shaft extends axially into the cavity. The outer rotor is coaxially disposed outside the inner stator. The outer casing seals and covers the outer rotor and inner stator. The end of the rotating shaft away from the tank body is coaxially connected to the outer rotor. The stirring assembly includes a stirring shaft connected to the end of the rotating shaft away from the outer rotor.

[0011] Based on the above structure, the principle of the stirring device is as follows: First, the liquid to be stirred is poured into the container cavity; then, the top cover is smoothly placed on the opening at the top of the container to ensure a seal and prevent the liquid from splashing out during stirring. Before placing the top cover, check whether the stirring component inside the container is reliably connected to the shaft of the drive motor; then, the drive motor is started, and the outer rotor rotates coaxially under the action of electromagnetic force. Through the connection with the shaft, the power is axially transmitted to the stirring component inside the container, and the stirring component begins to stir the liquid. After stirring is completed, the drive device is turned off and the top cover is turned on. The top cover provides the desired mixed liquid. The drive motor features an outer rotor and inner stator design, which, compared to traditional inner rotor motors, is more compact, saves axial space, and is suitable for top cover installation. The outer rotor directly drives the shaft, providing high torque output, making it suitable for stirring high-resistance liquids (such as high-viscosity liquids). The outer casing seals and encloses the outer rotor and inner stator, preventing external liquids from entering the drive motor and avoiding problems such as corrosion and short circuits, thus improving safety and extending the drive motor's lifespan. The drive motor is directly mounted on the top cover, eliminating the need for an external transmission mechanism, resulting in a simple structure and small footprint.

[0012] Furthermore, in one stirring device of this application, the inner stator is a hollow cylinder. The inner stator includes a receiving cavity, in which an annular mounting seat is centrally located. The annular mounting seat is sleeved on the rotating shaft. A set of connecting rods is provided on the outer wall of the annular mounting seat. The set of connecting rods is evenly spaced along the circumference of the annular mounting seat, and all of the connecting rods extend axially to the side wall of the receiving cavity. As a preferred embodiment of this application, the stirring device of this application adopts a hollow cylindrical structure for the inner stator, with an annular mounting seat and connecting rods inside. The annular mounting seat is securely installed in the inner stator by a set of connecting rods, providing a stable support structure for the rotating shaft, ensuring the stability of the rotating shaft during rotation, ensuring that the stirring assembly can operate smoothly, and utilizing the internal space of the inner stator, making the structure of the drive motor more compact and saving axial space.

[0013] Furthermore, in one stirring device of this application, the outer rotor is an axially open cylindrical shell, with the opening of the outer rotor facing the inner stator. The outer rotor is coaxially sleeved on the outside of the inner stator. A permanent magnet is provided on the inner sidewall of the outer rotor, and an iron core is provided on the outer sidewall of the inner stator. As a preferred embodiment of this application, in one stirring device, the permanent magnet on the inner sidewall of the outer rotor and the iron core on the outer sidewall of the inner stator cooperate to form an electromagnetic drive system. When the iron core of the inner stator is energized, it generates an alternating magnetic field, which interacts with the permanent magnet, causing the outer rotor to rotate, thereby driving the rotating shaft and stirring components to rotate, thus realizing the stirring function. The outer rotor being coaxially sleeved on the outside of the inner stator allows the outer rotor to directly drive the rotating shaft, enabling the drive motor to have higher torque output, meeting the stirring requirements of high-resistance liquids (such as high-viscosity liquids), improving stirring efficiency and effect. Moreover, the outer rotor adopts an axially open cylindrical shell, with the opening facing the inner stator and coaxially sleeved. This design makes the structure of the drive motor more compact, reducing the size of the drive motor and saving installation space.

[0014] Furthermore, in one stirring device of this application, a bearing is provided between the rotating shaft and the annular mounting base, the bearing being sleeved on the rotating shaft and mounted on the annular mounting base. As a preferred embodiment of this application, the bearing reduces the friction between the rotating shaft and the annular mounting base, reduces wear between them, extends the service life of the stirring device, reduces energy loss, and improves the power transmission efficiency of the stirring device.

[0015] Furthermore, in one stirring device of this application, an extension is provided on the outer side wall of the inner stator near the top cover. The extension extends radially along the inner stator, and a notch corresponding to the extension is provided on the inner side wall of the outer casing. The notch is used to accommodate the extension. When the extension is located within the notch, the extension abuts against the corresponding side walls of the notch in the axial and radial directions of the inner stator, respectively. As a preferred embodiment of this application, in this stirring device, the extension and the notch cooperate. During assembly, by aligning and embedding the extension into the notch, the accurate installation of the inner stator and the outer casing can be quickly achieved, reducing assembly difficulty and improving production efficiency.

[0016] Furthermore, in one stirring device of this application, a sealing element is provided between the contact surfaces of the extension and the outer casing in the radial direction of the inner stator, and the sealing element is arranged along the circumference of the inner stator. As a preferred embodiment of this application, in one stirring device of this application, the sealing element is used to prevent external dust, liquid vapor, or liquids from entering the interior of the drive motor through the contact surfaces of the extension and the outer casing, thereby preventing internal components from corrosion, short circuits, and other malfunctions due to the intrusion of liquids, and improving the reliability of the drive motor.

[0017] Furthermore, in one stirring device of this application, a set of heat sinks is provided on the outer wall of the outer casing, and the set of heat sinks is arranged in an array along the circumference of the outer casing. As a preferred embodiment of this application, in one stirring device of this application, the set of heat sinks is used to increase the heat dissipation area of ​​the outer casing, which can effectively reduce the internal temperature of the drive motor, avoid performance degradation or damage to the drive motor due to overheating, and ensure that the drive motor can operate continuously and stably.

[0018] Furthermore, in one of the stirring devices of this application, the stirring assembly further includes: a plurality of stirring blades, the stirring blades being disposed on the outer wall of the stirring shaft, the stirring blades being evenly spaced along the axial and circumferential directions of the stirring shaft, and the upper and lower adjacent stirring blades being staggered. As a preferred embodiment of this application, the stirring device of this application, with the stirring blades evenly spaced along the axial and circumferential directions of the stirring shaft, enables the stirring range to cover all areas within the container cavity, avoiding the formation of dead zones in the stirring. At the same time, the staggered arrangement of the upper and lower adjacent stirring blades allows different layers of liquid to be subjected to stirring forces in different directions during the stirring process, promoting more thorough mixing between the liquids, thereby improving the uniformity of the stirring.

[0019] Furthermore, a stirring device according to this application further includes: a base, the upper end of which is provided with a trough for accommodating a barrel; the base includes: a set of support legs, the set of support legs being spaced apart along the circumference of the barrel. As a preferred embodiment of this application, in a stirring device, the trough provides positioning for the barrel, preventing displacement of the barrel during stirring; the set of support legs spaced apart along the circumference of the barrel prevents the barrel from tilting or shaking due to uneven force during stirring, ensuring the stability of the stirring device's operation.

[0020] Furthermore, in one of the stirring devices of this application, the bottom of the barrel is provided with a discharge port for discharging the stirred liquid mixture. As a preferred embodiment of this application, the discharge port of the stirring device is located at the bottom of the barrel, so that the stirred liquid mixture can flow out of the barrel relatively smoothly by utilizing gravity.

[0021] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0022] The purpose of this invention is to provide a stirring device that solves the problems of large axial space occupation and insufficient torque in traditional stirring devices by adopting a compact structural design that directly drives the stirring components with an external rotor drive motor. At the same time, it optimizes the stator support structure, heat dissipation performance and stirring blade layout to achieve efficient mixing of high-viscosity liquids, improve operational stability and extend equipment service life. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural schematic diagram of a stirring device according to an embodiment of this application;

[0024] Figure 2 This is a cross-sectional view of a stirring device according to an embodiment of this application;

[0025] Figure 3 for Figure 2 A magnified view of a portion of area A in the middle circle.

[0026] In the diagram: 1-Bucket body; 10-Cavity; 100-Outlet; 2-Top cover; 3-Agitator assembly; 31-Agitator shaft; 32-Agitator blades; 4-Drive motor; 41-Rotating shaft; 42-Outer rotor; 43-Inner stator; 430-Receiving cavity; 431-Annular mounting seat; 432-Connecting rod; 433-Iron core; 434-Extension; 44-Outer cover; 440-Notch; 441-Heat sink; 5-Bearing; 6-Seal; 7-Base; 70-Receiving groove; 71-Support leg. Detailed Implementation

[0027] like Figure 1 , 2 As shown in Figure 3, a stirring device includes:

[0028] A barrel body 1 with an opening at the top, wherein the barrel body 1 is provided with a cavity 10;

[0029] Top cover 2, which is installed over the upper opening of the barrel body 1;

[0030] A stirring assembly 3 is centrally located within the cavity 10 and is used to stir the liquid within the cavity 10.

[0031] The drive motor 4 is mounted on the top cover 2. The drive motor 4 includes: a rotating shaft 41, an outer rotor 42, an inner stator 43, and an outer cover 44. The inner stator 43 is mounted on the top cover 2 and sleeved on the rotating shaft 41. The rotating shaft 41 extends axially into the cavity 10. The outer rotor 42 is coaxially disposed outside the inner stator 43. The outer cover 44 seals and covers the outer rotor 42 and the inner stator 43. The end of the rotating shaft 41 away from the barrel 1 is coaxially connected to the outer rotor 42. The stirring assembly 3 includes: a stirring shaft 31, which is connected to the end of the rotating shaft 41 away from the outer rotor 42.

[0032] Based on the above structure, the principle of the stirring device is as follows: First, the liquid to be stirred is poured into the cavity 10 of the tank 1; then, the top cover 2 is smoothly placed on the upper opening of the tank 1 to ensure a seal and prevent the liquid from splashing out during stirring. Before placing the top cover 2, it is checked whether the stirring component 3 in the cavity 10 is reliably connected to the rotating shaft 41 of the drive motor 4; then, the drive motor 4 is started, and the outer rotor 42 rotates coaxially under the action of electromagnetic force. Through the connection with the rotating shaft 41, the power is axially transmitted to the stirring component 3 in the cavity 10, and the stirring component 3 begins to stir the liquid. After stirring is completed, the drive device is turned off. Open the top cover 2 to obtain the desired mixed liquid. The drive motor 4 adopts an outer rotor 42 and an inner stator 43 design. Compared with traditional inner rotor motors, it has a compact structure, saves axial space, and is suitable for installation on the top cover 2. The outer rotor 42 directly drives the rotating shaft 41, providing high torque output, which is suitable for stirring high-resistance liquids such as high-viscosity liquids. The outer casing 44 seals and encloses the outer rotor 42 and inner stator 43, preventing external liquids from entering the drive motor 4, avoiding corrosion, short circuits, and other problems, thus improving safety and extending the life of the drive motor 4. The drive motor 4 is directly installed on the top cover 2, eliminating the need for an external transmission mechanism, resulting in a simple structure and small footprint. The rotating shaft 41 is connected to the stirring shaft 31 via a connecting sleeve.

[0033] In this embodiment, the inner stator 43 is a hollow cylinder. The inner stator 43 includes a receiving cavity 430, within which a centrally located annular mounting seat 431 is provided. The annular mounting seat 431 is fitted onto the rotating shaft 41. A set of connecting rods 432 is provided on the outer wall of the annular mounting seat 431. The set of connecting rods 432 are evenly spaced along the circumference of the annular mounting seat 431, and all of the connecting rods 432 extend axially to the side wall of the receiving cavity 430. The inner stator 43 adopts a hollow cylindrical structure, with the annular mounting seat 431 and connecting rods 432 inside. The annular mounting seat 431 is securely mounted in the inner stator 43 by the set of connecting rods 432, providing a stable support structure for the rotating shaft 41, ensuring the stability of the rotating shaft 41 during rotation, ensuring the smooth operation of the stirring assembly 3, and utilizing the internal space of the inner stator 43, making the structure of the drive motor 4 more compact and saving axial space. The number of connecting rods 432 is eight.

[0034] In this embodiment, the outer rotor 42 is an axially open cylindrical shell with the opening facing the inner stator 43. The outer rotor 42 is coaxially sleeved on the outside of the inner stator 43. The inner sidewall of the outer rotor 42 is provided with a permanent magnet, and the outer sidewall of the inner stator 43 is provided with an iron core 433. The permanent magnet on the inner wall of the outer rotor 42 and the iron core 433 on the outer wall of the inner stator 43 work together to form an electromagnetic drive system. When the iron core 433 of the inner stator 43 is energized, it generates an alternating magnetic field, which interacts with the permanent magnet, causing the outer rotor 42 to rotate. This, in turn, drives the rotating shaft 41 and the stirring assembly 3 to rotate, thus achieving the stirring function. The outer rotor 42 is coaxially sleeved on the outside of the inner stator 43. This structure allows the outer rotor 42 to directly drive the rotating shaft 41, giving the drive motor 4 a higher torque output. This meets the stirring requirements of high-resistance liquids such as high-viscosity liquids, improving stirring efficiency and effect. Furthermore, the outer rotor 42 adopts an axially open cylindrical shell with the opening facing the inner stator 43 and coaxially sleeved. This design makes the structure of the drive motor 4 more compact, reducing the size of the drive motor 4 and saving installation space.

[0035] In this embodiment, a bearing 5 is provided between the rotating shaft 41 and the annular mounting base 431. The bearing 5 is sleeved on the rotating shaft 41 and mounted on the annular mounting base 431. The bearing 5 reduces the friction between the rotating shaft 41 and the annular mounting base 431, reduces wear between them, extends the service life of the stirring device, reduces energy loss, and improves the power transmission efficiency of the stirring device. A bearing 5, which is a ball bearing, is installed at each of the upper and lower ends of the annular mounting base 431.

[0036] In this embodiment, an extension 434 is provided on the outer side wall of the inner stator 43 near the top cover 2. The extension 434 extends radially along the inner stator 43. A notch 440 corresponding to the extension 434 is provided on the inner side wall of the outer cover 44. The notch 440 is used to accommodate the extension 434. When the extension 434 is located within the notch 440, the extension 434 abuts against the corresponding side wall of the notch 440 in the axial and radial directions of the inner stator 43. The extension 434 and the notch 440 cooperate with each other. During the assembly process, by aligning the extension 434 and inserting it into the notch 440, the inner stator 43 and the outer cover 44 can be quickly and accurately installed, reducing the assembly difficulty and improving production efficiency.

[0037] In this embodiment, a sealing element 6 is provided between the contact surfaces of the extension 434 and the outer casing 44 in the radial direction of the inner stator 43. The sealing element 6 is arranged circumferentially along the inner stator 43. The sealing element 6 is used to prevent external dust, liquid vapor, or liquids from entering the drive motor 4 through the contact surfaces of the extension 434 and the outer casing 44, thus preventing internal components from corroding, short-circuiting, or other malfunctions due to liquid intrusion, thereby improving the reliability of the drive motor 4. The sealing element 6 is an O-ring rubber seal.

[0038] In this embodiment, a set of heat sinks 441 are provided on the outer side wall of the outer casing 44, and the set of heat sinks 441 are arranged in a circumferential array along the outer casing 44. The set of heat sinks 441 is used to increase the heat dissipation area of ​​the outer casing 44, which can effectively reduce the internal temperature of the drive motor 4, prevent the drive motor 4 from degrading in performance or being damaged due to overheating, and ensure that the drive motor 4 can operate continuously and stably. The number of heat sinks 441 in a set is 24.

[0039] In this embodiment, the stirring assembly 3 further includes a plurality of stirring blades 32, which are disposed on the outer wall of the stirring shaft 31. The stirring blades 32 are evenly spaced along the axial and circumferential directions of the stirring shaft 31, with adjacent upper and lower stirring blades 32 staggered. The evenly spaced stirring blades 32 along the axial and circumferential directions of the stirring shaft 31 allow the stirring range to cover all areas within the cavity 10 of the tank 1, avoiding dead zones. Simultaneously, the staggered arrangement of adjacent upper and lower stirring blades 32 ensures that different layers of liquid are subjected to stirring forces in different directions during the stirring process, promoting more thorough mixing and improving the uniformity of the stirring. Three sets of stirring blades 32 are provided along the axial direction of the stirring shaft 31, with each set consisting of three blades, evenly spaced along the circumferential direction of the stirring shaft 31.

[0040] In this embodiment, the device further includes a base 7, with a receiving groove 70 at its upper end for accommodating the barrel 1. The base 7 includes a set of support legs 71 spaced apart around the circumference of the barrel 1. The receiving groove 70 provides positioning for the barrel 1, preventing displacement during stirring. The set of support legs 71 spaced apart around the circumference of the barrel 1 prevents it from tilting or shaking due to uneven force during stirring, ensuring the stability of the stirring device. The set of support legs 71 consists of four legs.

[0041] In this embodiment, the bottom of the barrel 1 is provided with a discharge port 100, which is used to discharge the mixed liquid after stirring. The discharge port 100 is located at the bottom of the barrel 1, and gravity allows the mixed liquid to flow out of the barrel 1 relatively smoothly. The bottom of the barrel 1 is provided with a drain pipe, which is connected to the discharge port 100.

[0042] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on the explanation herein, those skilled in the art can conceive of other specific embodiments of this utility model without creative effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A stirring device, characterized in that: include: A barrel (1) with an opening at the top, and a cavity (10) is provided inside the barrel (1). Top cover (2), the top cover (2) is placed over the upper opening of the barrel body (1); A stirring assembly (3) is centrally located within a cavity (10) and is used to stir the liquid within the cavity (10). The drive motor (4) is mounted on the top cover (2). The drive motor (4) includes: a rotating shaft (41), an outer rotor (42), an inner stator (43), and an outer cover (44). The inner stator (43) is mounted on the top cover (2) and is sleeved on the rotating shaft (41). The rotating shaft (41) extends axially into the cavity (10). The outer rotor (42) is coaxially disposed outside the inner stator (43). The outer cover (44) is sealed and disposed outside the outer rotor (42) and the inner stator (43). The end of the rotating shaft (41) away from the barrel (1) is coaxially connected to the outer rotor (42). The stirring assembly (3) includes: a stirring shaft (31). The stirring shaft (31) is connected to the end of the rotating shaft (41) away from the outer rotor (42).

2. The stirring device according to claim 1, characterized in that: The inner stator (43) is a hollow cylinder. The inner stator (43) includes a receiving cavity (430). An annular mounting seat (431) is provided in the center of the receiving cavity (430). The annular mounting seat (431) is sleeved on the rotating shaft (41). A set of connecting rods (432) is provided on the outer side wall of the annular mounting seat (431). The set of connecting rods (432) is evenly spaced along the circumference of the annular mounting seat (431). The set of connecting rods (432) all extend axially to the side wall of the receiving cavity (430).

3. The stirring device according to claim 2, characterized in that: The outer rotor (42) is an axially open cylindrical shell. The opening of the outer rotor (42) faces the inner stator (43). The outer rotor (42) is coaxially sleeved on the outside of the inner stator (43). A permanent magnet is provided on the inner side wall of the outer rotor (42), and an iron core (433) is provided on the outer side wall of the inner stator (43).

4. The stirring device according to claim 2, characterized in that: A bearing (5) is provided between the rotating shaft (41) and the annular mounting base (431). The bearing (5) is sleeved on the rotating shaft (41) and mounted on the annular mounting base (431).

5. The stirring device according to claim 1, characterized in that: An extension (434) is provided on the outer side wall near the top cover (2) of the inner stator (43). The extension (434) extends radially along the inner stator (43). A notch (440) corresponding to the extension (434) is provided on the inner side wall of the outer cover (44). The notch (440) is used to accommodate the extension (434). When the extension (434) is located in the notch (440), the extension (434) abuts against the corresponding side wall of the notch (440) in the axial and radial directions of the inner stator (43).

6. The stirring device according to claim 5, characterized in that: A sealing element (6) is provided between the extension (434) and the outer casing (44) on the radial contact surface of the inner stator (43), and the sealing element (6) is arranged along the circumference of the inner stator (43).

7. The stirring device according to claim 1, characterized in that: A set of heat sinks (441) is provided on the outer side wall of the outer casing (44), and the set of heat sinks (441) is arranged in a circumferential array along the outer casing (44).

8. The stirring device according to claim 1, characterized in that: The stirring assembly (3) further includes: a plurality of stirring blades (32), the stirring blades (32) being disposed on the outer side wall of the stirring shaft (31), the stirring blades (32) being evenly spaced along the axial and circumferential directions of the stirring shaft (31), and the upper and lower adjacent stirring blades (32) being staggered.

9. A stirring device according to claim 1, characterized in that: Also includes: The base (7) has a trough (70) at its upper end, which is used to accommodate the barrel (1). The base (7) includes a set of support legs (71) which are spaced apart around the barrel (1).

10. A stirring device according to claim 1, characterized in that: The bottom of the barrel (1) is provided with a discharge port (100), which is used to discharge the mixed liquid after stirring.

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