Mixing stirrer

Abstract

The invention belongs to the technical field of stirring equipment, and particularly relates to a mixing stirrer which comprises an outer stirring basket, an inner stirring basket, a driving mechanism, an outer rotating rod, an inner rotating rod and a transmission shaft and is further provided with a first reducing mechanism and a second reducing mechanism, and the transmission ratio can be changed during reducing so as to adjust the relative rotating speed of the outer rotating rod and the inner rotating rod. The first variable-diameter mechanism and the second variable-diameter mechanism are consistent in structure and comprise a fixed cone disc, a movable cone disc capable of moving axially and a fixed disc arranged on the rotating rod in a sleeving manner, an oil supply pipeline is arranged on the fixed disc, the second variable-diameter mechanism is assembled on the transmission shaft, and the transmission shaft and the outer rotating rod achieve reverse rotation of the outer stirring basket and the inner stirring basket through gear meshing transmission. Multi-working-condition switching is achieved through reverse rotation of the inner stirring basket and the outer stirring basket and adjustment of the reducing mechanism, different material treatment requirements are met, and the stirring uniformity and efficiency are improved.

Description

Technical Field

[0001] This invention belongs to the field of mixing equipment technology, specifically a mixing mixer. Background Technology

[0002] A mixer is a general-purpose device widely used in food, chemical, and pharmaceutical industries. It can mix materials in different states, such as liquid, paste, and granules. The movement of the mixing components achieves uniform mixing, emulsification, or dispersion of materials, meeting the basic processing needs of various industries for material texture and uniformity.

[0003] Existing mixers are mainly composed of the following parts: power unit, stirring paddle, etc. The working principle is as follows: after the motor is powered on, it outputs power, which drives the stirring actuator to rotate at high speed through the transmission system. The rotating stirring actuator mixes, agitates, or emulsifies the material through shearing and impact, so as to meet the requirements of material texture in production.

[0004] Current mixers have the following drawbacks: their mixing structure is mostly a single mixing component with a fixed rotation speed range, making it impossible to dynamically adjust the speed difference. This results in splashing when mixing low-viscosity materials, low whipping efficiency when mixing high-viscosity materials, and excessive shearing when mixing materials that require gentle mixing. Their poor adaptability limits their applicability and processing effect in food processing. Therefore, a mixing mixer is proposed to address these issues. Summary of the Invention

[0005] To overcome the shortcomings of existing mixers, a new mixing mixer is proposed.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides a mixing mixer, including an outer mixing basket and an inner mixing basket, and also includes a driving mechanism for driving the outer mixing basket and the inner mixing basket. The driving mechanism includes an outer rotating rod fixedly connected to the outer mixing basket and an inner rotating rod fixedly connected to the inner mixing basket, a first diameter changing mechanism and a second diameter changing mechanism, both of which are fitted with belts for transmission between them. When the first diameter changing mechanism and the second diameter changing mechanism change their diameters, the transmission ratio between them is changed to adjust the relative rotation speed of the outer rotating rod and the inner rotating rod.

[0007] Preferably, the first diameter changing mechanism and the second diameter changing mechanism have the same structure. The first diameter changing mechanism is assembled on the inner rotating rod. The first diameter changing mechanism includes a fixed cone plate fixed on the inner rotating rod and a movable cone plate that is matched with the fixed cone plate. It also includes a fixed plate sleeved on the inner rotating rod. The movable cone plate is axially movably sleeved on the fixed plate and the inner rotating rod, and the contact surfaces are all provided with sealing elements.

[0008] Preferably, the first and second diameter changing mechanisms are provided with an equipment box outside the equipment box, the fixed plate is fixedly connected inside the equipment box, the fixed plate is provided with an oil supply pipe, one end of the oil supply pipe is connected to the space between the fixed plate and the moving cone plate, and the other end is connected to an external oil pump, and one end of the inner rotating rod rotates through the equipment box through a bearing and is connected to the driving device through a coupling.

[0009] Preferably, the moving cone disk is equipped with a thrust ball bearing, and a thrust spring is connected between the thrust ball bearing and the fixed disk.

[0010] Preferably, the inner rotating rod passes through the outer rotating rod, and the two are rotatably connected by a bearing. The drive mechanism also includes a transmission shaft rotatably disposed in the equipment box by a bearing, and the second diameter-changing mechanism is mounted on the transmission shaft.

[0011] Preferably, the outer rotating rod passes through the equipment box via a bearing, a first gear is provided on the transmission shaft, and a second gear is provided on the outer rotating rod that meshes with the first gear.

[0012] Preferably, the two side walls of the belt are trapezoidal structures, and the opposing surfaces of the fixed cone disc and the moving cone disc are conical surfaces that cooperate with the trapezoidal structures of the two side walls of the belt.

[0013] Preferably, the first diameter changing mechanism and the second diameter changing mechanism change diameter synchronously. When the diameter of the belt driven by the first diameter changing mechanism tends to increase, the diameter of the belt driven by the second diameter changing mechanism tends to decrease, and vice versa.

[0014] Preferably, the inner rotating rod is provided with a guide groove, and the moving cone disk is provided with a guide block that cooperates with the guide groove, which is used to restrict the moving cone disk from moving axially along the inner rotating rod and prevent it from rotating radially.

[0015] Preferably, the outer stirring basket is composed of several staggered fixed arc rods and flexible rods. A movable sleeve is slidably fitted on the outer rotating rod. The equipment box is equipped with a linkage mechanism that drives the movable sleeve to reciprocate along the axial direction of the outer rotating rod. The linkage mechanism includes an annular oil cylinder. The oil supply channel of the annular oil cylinder is connected to the oil supply pipeline, and the two share the same oil circuit. An annular piston is fitted inside the annular oil cylinder. Several piston rods extending out of the annular oil cylinder are equidistantly fitted on the annular piston in a circular array. One end of the piston rod is connected to the movable sleeve through a plane bearing. The movable sleeve has holes through which the flexible rod can pass. The other end of the flexible rod is fixed to the outer rotating rod by a fixing block. When the movable sleeve moves upward, the effective stirring range of the flexible rod gradually expands. When the movable sleeve moves downward, the effective stirring range of the flexible rod gradually decreases.

[0016] The beneficial effects of this invention are:

[0017] This invention provides a mixing mixer that, through the counter-rotation design of the outer and inner mixing baskets, combined with the synchronous diameter change and dynamic speed difference adjustment of the first and second diameter change mechanisms, achieves switching between various working conditions such as "outer fast, inner slow", "inner fast, outer slow" and "constant speed". It can be specifically adapted to different process requirements such as anti-splashing of low-viscosity materials, efficient agitation of high-viscosity materials, and gentle mixing, improving the mixing adaptability and processing effect, enabling materials to achieve three-dimensional mixing in complex convection trajectories, effectively avoiding particle sedimentation or aggregation, and significantly improving mixing uniformity and production efficiency.

[0018] The linkage mechanism and the diameter-changing mechanism share the same oil supply pipeline. When adjusting the speed difference, the hydraulic oil synchronously drives the linkage mechanism to move the movable sleeve, so that the stirring range of the flexible rod in the outer stirring basket changes synchronously with the speed difference. Together with the fixed arc rod, a dynamic staggered stirring flow field is formed, filling the radial stirring blind zone and forming a dual synergistic adjustment of speed difference and stirring range. Through dynamic range coverage and staggered stirring, the diversity is enhanced, and it can accurately adapt to various materials such as low viscosity, high viscosity and particulate matter, further improving the mixing uniformity and production efficiency. Attached Figure Description

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 This is a cross-sectional view of the overall structure of the present invention;

[0021] Figure 2 This is a structural diagram of the driving mechanism of the present invention;

[0022] Figure 3 This is a top view of the structure of the flexible rod and the fixed arc rod in the outer stirring basket of the present invention when the flexible rod retracts;

[0023] Figure 4 This is a top view of the structure of the flexible rod and the fixed arc rod in the outer stirring basket of the present invention when the flexible rod is expanded;

[0024] Legend:

[0025] 1. Outer mixing basket; 101. Fixed arc rod; 102. Flexible rod; 2. Inner mixing basket; 3. Drive mechanism; 301. Outer rotating rod; 302. Inner rotating rod; 303. First diameter changing mechanism; 3031. Fixed cone plate; 3032. Moving cone plate; 3033. Fixed plate; 3034. Oil supply pipe; 3035. Thrust spring; 304. Second diameter changing mechanism; 305. Belt; 306. Drive shaft; 4. Equipment box; 5. First gear; 6. Second gear; 7. Guide groove; 8. Guide block; 9. Linkage mechanism; 901. Annular cylinder; 902. Annular piston; 903. Piston rod; 904. Flat bearing; 10. Movable sleeve. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Specific implementation examples are given below.

[0028] Please see Figures 1-4 The present invention provides a mixing mixer, comprising an outer mixing basket 1 and an inner mixing basket 2, and a driving mechanism 3 for driving the outer mixing basket 1 and the inner mixing basket 2. The driving mechanism 3 includes an outer rotating rod 301 fixedly connected to the outer mixing basket 1 and an inner rotating rod 302 fixedly connected to the inner mixing basket 2, a first diameter changing mechanism 303 and a second diameter changing mechanism 304, both of which are fitted with belts 305 for transmission between them. When the first diameter changing mechanism 303 and the second diameter changing mechanism 304 change their diameters, the transmission ratio between them is changed to adjust the relative rotational speed of the outer rotating rod 301 and the inner rotating rod 302.

[0029] The first diameter changing mechanism 303 and the second diameter changing mechanism 304 have the same structure. The first diameter changing mechanism 303 is assembled on the inner rotating rod 302. The first diameter changing mechanism 303 includes a fixed conical disc 3031 fixed on the inner rotating rod 302, and a movable conical disc 3032 that is oppositely matched with the fixed conical disc 3031. It also includes a fixed disc 3033 sleeved on the inner rotating rod 302. The movable conical disc 3032 is axially movably sleeved on the fixed disc 3033 and the inner rotating rod 302, and the contact surfaces are all provided with sealing elements. An equipment box 4 is provided outside the first diameter changing mechanism 303 and the second diameter changing mechanism 304. The fixed disk 3033 is fixedly connected inside the equipment box 4. An oil supply pipe 3034 is provided on the fixed disk 3033. One end of the oil supply pipe 3034 is connected to the space between the fixed disk 3033 and the moving cone disk 3032, and the other end is connected to an external oil pump. One end of the inner rotating rod 302 rotates through the equipment box 4 through a bearing and is connected to the drive equipment through a coupling. The drive equipment of the present invention adopts a drive motor, but is not limited to a drive motor.

[0030] The inner rotating rod 302 passes through the outer rotating rod 301, and the two are rotatably connected by a bearing. The drive mechanism 3 also includes a transmission shaft 306 rotatably mounted in the equipment box 4 via a bearing. The second variable diameter mechanism 304 is mounted on the transmission shaft 306. The outer rotating rod 301 passes through the equipment box 4 via a bearing. A first gear 5 is provided on the transmission shaft 306, and a second gear 6 that meshes with the first gear 5 is provided on the outer rotating rod 301.

[0031] The first diameter-changing mechanism 303 and the second diameter-changing mechanism 304 change diameters synchronously. When the diameter of the belt 305 driven by the first diameter-changing mechanism 303 tends to increase, the diameter of the belt 305 driven by the second diameter-changing mechanism 304 tends to decrease; conversely, when the diameter of the belt 305 driven by the second diameter-changing mechanism 304 tends to increase, the diameter of the belt 305 driven by the first diameter-changing mechanism 303 tends to decrease. A guide groove 7 is provided on the inner rotating rod 302, and a guide block 8 that cooperates with the guide groove 7 is provided on the moving cone disk 3032 to restrict the moving cone disk 3032 from moving axially along the inner rotating rod 302. Radial rotation; during operation, the drive unit starts and drives the inner rotating rod 302 to rotate via the coupling. The inner rotating rod 302 drives the fixed cone plate 3031 of the first diameter changing mechanism 303 to rotate synchronously. The first diameter changing mechanism 303 transmits power to the second diameter changing mechanism 304 via the belt 305, driving its fixed cone plate 3031 and transmission shaft 306 to rotate. The transmission shaft 306 meshes with the second gear 6 of the outer rotating rod 301 via the first gear 5, driving the outer rotating rod 301 and the outer stirring basket 1 to rotate, realizing the coordinated and counter-rotating of the inner and outer stirring baskets. When it is necessary to adjust the relative speed of the two, the controller controls the first diameter changing mechanism 303 and the second diameter changing mechanism respectively. The external oil pump corresponding to 304; when supplying oil to the first diameter changing mechanism 303, hydraulic oil enters the sealed space between the fixed plate 3033 and the moving cone plate 3032 through the oil supply pipe 3034, pushing the moving cone plate 3032 axially closer to the fixed cone plate 3031. At the same time, the moving cone plate 3032 squeezes the belt 305, causing the contact surface between the belt 305 and the moving cone plate 3032 and the fixed cone plate 3031 to expand outward, that is, the belt contact rotation diameter between the moving cone plate 3032 and the fixed cone plate 3031 increases; simultaneously, the controller controls the oil pump of the second diameter changing mechanism 304 to supply oil to the sealed space between the fixed plate 3033 and the moving cone plate 3032. The hydraulic oil is extracted, causing the moving cone 3032 to move away from the fixed cone 3031. Similarly, the contact diameter of the belt 305 decreases synchronously. After synchronous reverse diameter change, the transmission ratio of the first diameter change mechanism 303 and the second diameter change mechanism 304 changes, thereby adjusting the relative speed of the outer rotating rod 301 and the inner rotating rod 302 driven by the two respectively. At this time, the speed of the transmission shaft 306 driven by the second diameter change mechanism 304 will increase, causing the speed of the outer rotating rod 301 driven by the outer stirring basket 1 to increase. The speed of the inner rotating rod 302 driven by the inner stirring basket 2 is lower than the speed of the outer rotating rod 301 driven by the outer stirring basket 1. The two stirring baskets form a speed difference of faster outside and slower inside.Conversely, the adjustment principle is the same as above and will not be repeated here. If the diameter of the first diameter-changing mechanism 303 decreases and the diameter of the second diameter-changing mechanism 304 increases, the rotation speed of the outer rotating rod 301 decreases, and the two stirring baskets form a speed difference of faster inside and slower outside. The operator can adjust the speed difference accordingly as needed, or set it to the same speed. Through the design and coordination of the above structures, the switching between three working conditions can be achieved: "fast outside and slow inside", "fast inside and slow outside", and "constant speed". When the outside is fast and the inside is slow, the high-speed rotation of the outer stirring basket 1 forms an outward constraint, which, together with the low-speed blocking of the inner stirring basket 2, can effectively prevent low-viscosity materials from splashing. Enhanced kneading effect in the central area; when the inner mixing basket 2 operates at a high speed while the outer mixing basket 1 operates at a low speed, the high-speed shearing of the inner basket 2 combined with the low-speed barrier of the outer mixing basket 1 powerfully tears apart high-viscosity materials and efficiently entrains air, improving mixing efficiency; when operating at a constant speed, gentle mixing of materials is achieved, avoiding excessive shearing that damages the texture, meeting the process characteristics requirements of different materials, and the counter-rotation of the inner and outer mixing baskets, compared to co-rotation, can form a more complex material convection trajectory, enabling the material to achieve three-dimensional mixing in "shear-collision-circulation", which is especially suitable for materials containing granular ingredients, preventing particle settling or aggregation.

[0032] Furthermore, a thrust ball bearing is installed inside the movable cone disk 3032, and a thrust spring 3035 is connected between the thrust ball bearing and the fixed disk 3033. During operation, when the movable cone disk 3032 on the first diameter changing mechanism 303 rotates synchronously with the inner rotating rod 302, or when the movable cone disk 3032 on the second diameter changing mechanism 304 rotates synchronously with the transmission shaft 306, the thrust ball bearing installed inside isolates the rotational motion of the movable cone disk 3032 from the thrust spring 3035. The outer ring of the thrust ball bearing rotates with the movable cone disk 3032, while the inner ring remains relatively stationary with the fixed disk 3033, thereby preventing the movable cone disk 3032 from rotating. The rotation is transmitted to the thrust spring 3035, preventing the spring from becoming entangled, twisted, or worn due to rotation. At the same time, the thrust spring 3035 is always in a compressed state, and its elastic force is transmitted to the moving cone plate 3032 through the thrust ball bearing. This causes the moving cone plate 3032 to continuously tend to move closer to the fixed cone plate 3031, thereby forming a stable axial clamping force on the belt 305. No matter how the first diameter changing mechanism 303 and the second diameter changing mechanism 304 adjust the diameter, this clamping force always exists, ensuring that the belt 305 keeps in close contact with the conical surfaces of the fixed cone plate 3031 and the moving cone plate 3032, providing sufficient friction for power transmission.

[0033] Furthermore, the two side walls of the belt 305 are trapezoidal structures, and the opposing surfaces of the fixed conical disc 3031 and the moving conical disc 3032 are conical surfaces that cooperate with the trapezoidal structures of the two side walls of the belt 305. During operation, when the moving conical disc 3032 moves axially closer to or further away from the fixed conical disc 3031, the distance between the conical surfaces of the fixed conical disc 3031 and the moving conical disc 3032 changes. Under the constraint of the conical surfaces, the trapezoidal belt 305 synchronously adjusts its contact position. When the distance decreases, the conical surfaces squeeze the trapezoidal side walls of the belt 305, causing the belt 305 to expand outward, increasing the contact diameter with the conical disc, and the two side walls of the belt 305 are completely in contact with the conical surfaces, with the contact area increasing as the diameter increases. When the distance increases, the belt 305 contracts inward under its own tension and the guiding action of the conical surfaces, reducing the contact diameter, while maintaining a tight fit between the two side walls and the conical surfaces. The inclination angle of the trapezoidal structure is perfectly matched with the conical surface angle of the conical disc, ensuring that the belt 305 does not slip laterally during the diameter change process and that the friction remains stable.

[0034] Furthermore, the outer stirring basket 1 is composed of several staggered fixed arc rods 101 and flexible rods 102. A movable sleeve 10 is slidably fitted on the outer rotating rod 301. The equipment box 4 is equipped with a linkage mechanism 9 that drives the movable sleeve 10 to reciprocate along the axial direction of the outer rotating rod 301. The linkage mechanism 9 includes an annular oil cylinder 901. The oil supply channel of the annular oil cylinder 901 is connected to the oil supply pipe 3034, and the two share the same oil circuit. An annular piston 902 is installed inside the annular oil cylinder 901. Several piston rods 903 extending out of the annular oil cylinder 901 are equidistantly mounted in a circular array on the annular piston 902. One end of the piston rod 903 is connected to the movable sleeve 10 through a plane bearing 904. The movable sleeve 10 has holes through which the flexible rod 102 can pass. The other end of the flexible rod 102 is fixed to the outer rotating rod 301 by a fixing block. When the movable sleeve 10 moves upward, the effective stirring range of the flexible rod 102 gradually expands; when the movable sleeve 10 moves downward, the effective stirring range of the flexible rod 102 gradually decreases. During operation, the oil supply channel of the annular cylinder 901 of the linkage mechanism 9 is connected to the oil supply pipe 3034 of the first diameter changing mechanism 303, sharing the same hydraulic oil circuit. When the controller adjusts the first diameter changing mechanism 303 to switch speed differences, hydraulic oil synchronously enters the chamber of the annular cylinder 901, pushing the annular piston 902 to move axially downward. The annular piston 902 moves downward through the movable sleeve 10. The piston rod 903 drives the movable sleeve 10 to move downward along the axial direction of the outer rotating rod 301. Since the piston rod 903 and the movable sleeve 10 are connected by a plane bearing 904, the plane bearing 904 can isolate the rotational motion of the movable sleeve 10 and the piston rod 903 when the outer rotating rod 301 rotates, avoiding rotational interference. When the movable sleeve 10 moves downward, the flexible rod 102 gradually contracts under the reverse traction of the movable sleeve 10, and the outward expansion arc continues to decrease, and the effective stirring range gradually shrinks from the maximum to the initial state. Because the linkage mechanism 9 and the diameter changing mechanism share the same oil circuit, the range change of the flexible rod 102 is synchronously linked with the speed difference adjustment of the first diameter changing mechanism 303. When the oil supply pipe 3034 on the first diameter changing mechanism 303 stops supplying oil and instead uses hydraulic pressure... When the oil is extracted, the hydraulic oil inside the annular cylinder 901 is also extracted. Subsequently, the piston rod 903 drives the movable sleeve 10 to move upward. The arc of the flexible rod 102 passing through its hole continues to increase, and the effective stirring range gradually expands from the initial state to the maximum. When the first diameter changing mechanism 303 cyclically adjusts the transmission ratio, the range of the flexible rod 102 changes from small to large and from large to small continuously with the adjustment of the transmission ratio of the first diameter changing mechanism 303. During this process, the fixed arc rod 101 always maintains a fixed shape, forming an interlaced cooperation with the dynamic range change of the flexible rod 102. The flexible rod 102 fills the stirring blind zone at different radial positions through the cyclically changing range, and the two work together to form a dynamically interlaced stirring flow field.Through the coordination of the above mechanisms, the linkage mechanism 9 and the variable diameter mechanism share the oil supply line 3034. When the variable diameter mechanism is adjusted to achieve speed difference switching, the hydraulic oil synchronously drives the linkage mechanism 9 to move the movable sleeve 10, so that the stirring range of the flexible rod 102 changes synchronously with the speed difference adjustment, realizing the synergy between speed difference and stirring range, and requiring no additional power source, greatly improving the adaptability to working conditions and the mixing effect.

[0035] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A mixing mixer, comprising an outer mixing basket (1) and an inner mixing basket (2), and further comprising a driving mechanism (3) for driving the outer mixing basket (1) and the inner mixing basket (2), the driving mechanism (3) comprising an outer rotating rod (301) fixedly connected to the outer mixing basket (1) and an inner rotating rod (302) fixedly connected to the inner mixing basket (2), characterized in that: The first diameter changing mechanism (303) and the second diameter changing mechanism (304) are fitted with belts (305) for transmission between them. When the first diameter changing mechanism (303) and the second diameter changing mechanism (304) change their diameters, the transmission ratio between them is changed to adjust the relative speed of the outer rotating rod (301) and the inner rotating rod (302).

2. The mixing stirrer according to claim 1, characterized in that: The first diameter changing mechanism (303) and the second diameter changing mechanism (304) have the same structure. The first diameter changing mechanism (303) is assembled on the inner rotating rod (302). The first diameter changing mechanism (303) includes a fixed cone disc (3031) fixed on the inner rotating rod (302) and a movable cone disc (3032) that is matched with the fixed cone disc (3031). It also includes a fixed disc (3033) sleeved on the inner rotating rod (302). The movable cone disc (3032) is axially movably sleeved on the fixed disc (3033) and the inner rotating rod (302), and the contact surfaces are all provided with sealing elements.

3. A mixing stirrer according to claim 1, characterized in that: The first diameter changing mechanism (303) and the second diameter changing mechanism (304) are provided with an equipment box (4). The fixed plate (3033) is fixed inside the equipment box (4). The fixed plate (3033) is provided with an oil supply pipe (3034). One end of the oil supply pipe (3034) is connected to the space between the fixed plate (3033) and the moving cone plate (3032), and the other end is connected to an external oil pump. One end of the inner rotating rod (302) rotates through the equipment box (4) through a bearing and is connected to the driving equipment through a coupling.

4. A mixing stirrer according to claim 2, characterized in that: The moving cone disk (3032) is equipped with a thrust ball bearing, and a thrust spring (3035) is connected between the thrust ball bearing and the fixed disk (3033).

5. A mixing stirrer according to claim 1, characterized in that: The inner rotating rod (302) passes through the outer rotating rod (301), and the two are rotatably connected by a bearing. The drive mechanism (3) also includes a transmission shaft (306) rotatably disposed in the equipment box (4) by a bearing. The second variable diameter mechanism (304) is mounted on the transmission shaft (306).

6. A mixing stirrer according to claim 1, characterized in that: The outer rotating rod (301) passes through the equipment box (4) via a bearing. A first gear (5) is provided on the transmission shaft (306), and a second gear (6) is provided on the outer rotating rod (301) to mesh with the first gear (5).

7. A mixing stirrer according to claim 2, characterized in that: The two side walls of the belt (305) are trapezoidal structures, and the opposite surfaces of the fixed cone disc (3031) and the moving cone disc (3032) are conical surfaces that cooperate with the trapezoidal structures of the two side walls of the belt (305).

8. A mixing stirrer according to claim 1, characterized in that: The first diameter changing mechanism (303) and the second diameter changing mechanism (304) change diameter synchronously. When the diameter of the belt (305) driven by the first diameter changing mechanism (303) tends to increase, the diameter of the belt (305) driven by the second diameter changing mechanism (304) tends to decrease. When the diameter of the belt (305) driven by the second diameter changing mechanism (304) tends to increase, the diameter of the belt (305) driven by the first diameter changing mechanism (303) tends to decrease.

9. A mixing stirrer according to claim 2, characterized in that: The inner rotating rod (302) is provided with a guide groove (7), and the moving cone disk (3032) is provided with a guide block (8) that cooperates with the guide groove (7) to restrict the moving cone disk (3032) from moving axially along the inner rotating rod (302) and from rotating radially.

10. A mixing stirrer according to claim 3, characterized in that: The outer stirring basket (1) is composed of several staggered fixed arc rods (101) and flexible rods (102). A movable sleeve (10) is slidably fitted on the outer rotating rod (301). The equipment box (4) is equipped with a linkage mechanism (9) that drives the movable sleeve (10) to reciprocate along the axial direction of the outer rotating rod (301). The linkage mechanism (9) includes an annular oil cylinder (901). The oil supply channel of the annular oil cylinder (901) is connected to the oil supply pipeline (3034), and the two share the same oil circuit. An annular piston (902) is installed inside the annular oil cylinder (901). Several piston rods (903) extending into annular cylinders (901) are equidistantly arranged in a ring array. One end of the piston rod (903) is connected to the movable sleeve (10) through a plane bearing (904). A flexible rod (102) can pass through the movable sleeve (10) through a hole. The other end of the flexible rod (102) is fixed to the outer rotating rod (301) by a fixing block. When the movable sleeve (10) moves upward, the effective stirring range of the flexible rod (102) gradually expands. When the movable sleeve (10) moves downward, the effective stirring range of the flexible rod (102) gradually decreases.

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