A magnetically drivable homogenizing storage tank assembly

Abstract

The application discloses a storage barrel assembly capable of being driven by magnetic force and being homogenized, and relates to the field of storage and transportation packaging containers. The storage barrel assembly comprises a storage barrel with a sealable barrel cover and a stirring sub which is prearranged in the barrel and stored with the barrel before filling and sealing. The overall density of the stirring sub is between the supernatant and the precipitate layer of liquid material, and the stirring sub is automatically suspended at the interface when being at rest, and automatically sinks with the precipitate being broken and the interface moving downward. When being used, the stirring sub is driven to rotate by a rotating magnetic field matched with the barrel, the scraping sheet on the stirring sub cuts and peels the precipitate layer, the spiral convex ridge pumps the material upward, and the homogenization is completed under the condition that the barrel cover is sealed. The application stores and transports the homogenization component as the prearranged inner part of the storage barrel, and completes the homogenization pretreatment without opening the barrel cover and moving the barrel body, so that the packaging sealing integrity is maintained, and the quality deterioration and safety hazards caused by opening the barrel are avoided.

Description

Technical Field

[0001] This invention relates to the field of storage and transportation packaging containers, and more particularly to a storage bucket assembly that can be magnetically driven to homogenize. Background Technology

[0002] Electroplating surface treatment agents are mostly complex solutions or suspensions containing solid particles or high-density components, with complex compositions and uneven density distribution. In actual production and operation, these treatment agents are usually stored in drums. During long-term storage, due to the influence of gravity settling, the material in the drum is prone to significant sedimentation and stratification. The higher-density solid components gradually settle at the bottom of the drum to form a dense sediment layer, while the upper layer is the supernatant.

[0003] To address the aforementioned sedimentation and stratification issues, the industry currently widely employs a method of mechanical stirring with the tank open for homogenization pretreatment. Operators open the tank lid and insert the stirring paddle into the tank to agitate the sediment.

[0004] The above method has the following technical defects: Firstly, opening the container disrupts its seal. For materials containing volatile components or sensitive to oxygen, opening the lid will cause the active ingredients to volatilize or oxidize and deteriorate, directly affecting the quality of the treatment agent.

[0005] Secondly, operators need to directly face the chemical materials when opening the container, which poses a safety hazard.

[0006] Third, if the lid needs to be resealed after mixing, the second seal is unlikely to restore the original factory sealing level.

[0007] Magnetic stirring technology enables non-contact stirring without opening the container. Drummed chemicals have strict requirements for the integrity of their packaging seals during warehousing and transportation. Packaging with a reduced seal level poses a risk of leakage during subsequent storage and transportation, making it difficult to meet storage and transportation management requirements.

[0008] From the perspective of packaging containers, if the homogenizing and stirring components can be pre-installed as internal parts of storage containers during storage and transportation, and homogenization can be achieved on-site without opening the container using an external power source, the problem of layering can be solved while maintaining the integrity of the sealed packaging throughout the process. Magnetic stirring technology can achieve non-contact stirring without opening the container. For example, Chinese patent CN210729377U discloses a magnetic stir bar and a magnetic funnel clamp containing the magnetic stir bar, which adjusts the overall density by setting a water-filled cavity in the outer shell of the stir bar to suit the stirring of liquids of different densities. Chinese patent CN116139759A discloses a magnetically adaptive, remotely controllable stirring device that uses a pressure sensor to detect the depth position of the magnetic stir bar in the liquid phase system. However, the aforementioned magnetic stirring technologies are all designed for open containers. The stir bar needs to be placed after the container is opened, and the stir bar can only stir at a specific position or height. It cannot act on a specific area inside the container when it is sealed. Furthermore, the existing technology cannot achieve dynamic tracking and precise positioning stirring of the clear liquid-sediment interface. For materials that have formed deep sediment or caking, conventional magnetic stirring is difficult to effectively break up the dense sediment layer at the bottom of the container. Summary of the Invention

[0009] The technical problem to be solved by the present invention is that the existing technology has the following defects when dealing with the precipitation and stratification of surface treatment agents for barrel electroplating: the need to open the barrel for operation, which leads to seal damage, volatilization and oxidation, safety hazards, and the inability of the stirring component to be used as a pre-installed internal component of the container for storage and adaptive positioning. The present invention provides a storage barrel assembly that can be magnetically driven to homogenize, which can achieve homogenization pretreatment without opening the barrel lid or damaging the barrel seal.

[0010] The technical solution adopted by this invention to solve its technical problem is: a magnetically driven homogenizing storage bucket assembly, comprising: A storage tank, comprising a tank body and a sealable lid; a stirrer, pre-placed in the tank body before the liquid is filled and sealed, and stored and transported together with the storage tank; the stirrer is in a free state within the storage tank and is not fixedly connected to the storage tank; the stirrer includes a permanent magnet, the overall density of which is configured between the density of the supernatant and the density of the sediment layer in the storage tank, so that the stirrer automatically suspends at the interface between the supernatant and the sediment layer when stationary, and automatically sinks as the sediment layer is broken up and the interface moves downward; The stir bar is configured to rotate non-contactly under the influence of a rotating magnetic field generated outside the storage tank by an external magnetic drive mechanism, so as to homogenize the liquid in the tank while keeping the tank lid sealed.

[0011] By placing the stir bar as a pre-installed component inside the storage tank before filling and sealing, and setting its density between that of the supernatant and the sediment layer, the stir bar can be automatically positioned at the sediment-supernatant interface during storage and transportation without opening the tank, and sink synchronously with the interface as it moves downward. This solves the technical problems of existing technologies where the stirring component needs to be placed after opening the tank, has a fixed position, and cannot adaptively track the interface. At the same time, the stir bar is driven non-contactly by a detachable magnetic drive mechanism outside the tank, achieving homogenization without opening the cap or moving the tank, maintaining the integrity of the packaging seal throughout the process, and eliminating the seal damage, volatilization oxidation, and safety hazards caused by opening the tank.

[0012] In some embodiments, the stirrer has an upper cone, a middle body and a lower cone arranged sequentially along its axial direction, and the center of gravity of the stirrer is biased towards the lower cone relative to its geometric center, and the center of buoyancy of the stirrer is biased towards the upper cone relative to its geometric center.

[0013] The asymmetrical design with the center of gravity at the bottom and the center of buoyancy at the top ensures that the stir bar remains vertically suspended with its bottom end facing down during operation, guaranteeing that the bottom end of the stir bar always points towards the sedimentation layer. This solves the technical problem that the stir bar cannot effectively act on the sedimentation layer when it is randomly tilted or inverted in the liquid.

[0014] In some embodiments, the cone angle of the upper cone is smaller than that of the lower cone, such that, under the same axial length and the same diameter as the connecting end of the middle body, the volume of the upper cone is larger than that of the lower cone.

[0015] By using a differentiated design with a small cone angle at the top (large volume) and a large cone angle at the bottom (small volume), the mechanical properties of the center of buoyancy being higher and the center of gravity being lower are further enhanced by the difference in geometric shape without the need to add independent counterweights. This enhances the self-aligning ability of the stirrer, allowing it to quickly return to a vertical posture after being disturbed by liquid flow.

[0016] In some embodiments, the outer surface of the middle section of the main body has a plurality of spiral protrusions extending along the axial direction. The spiral protrusions are configured to generate an axial thrust when the stirrer rotates, driving the liquid material to flow from the lower cone to the upper cone.

[0017] By converting the rotational motion of the stir bar into axial pumping force through the spiral ribs, a forced convection circulation loop is established inside the tank, continuously conveying the sediment material upwards to the supernatant, which greatly improves the homogenization efficiency and solves the technical problem that it is difficult to achieve full-volume mixing inside the tank by simply relying on stirring and shearing.

[0018] In some embodiments, the outer surface of the lower cone is provided with a plurality of scrapers, the lower end of the scrapers having a cutting edge facing forward of the direction of rotation of the stir bar, for cutting into and peeling off the sediment layer when the stir bar rotates.

[0019] By designing a wedge-shaped scraper blade, under the premise of limited magnetic drive torque, extremely high local cutting pressure is generated with a very small contact area, which can effectively cut into and peel off a certain compacted sediment layer, solving the technical problem that conventional large-area stirring paddles cannot break sediment layers due to insufficient pressure under magnetic drive.

[0020] In some embodiments, the outer surface of the upper cone is provided with a plurality of guide ridges extending along the axial direction. The bottom end of the guide ridge is connected to the top end of the spiral ridge, and the top end of the scraper is connected to the bottom end of the spiral ridge. The guide ridge, the spiral ridge, and the scraper together constitute a continuous longitudinal reinforcement structure from the lower cone through the middle body to the upper cone.

[0021] The continuous longitudinal reinforcement structure significantly improves the bending and torsional strength of the stirrer; at the same time, it forms a seamless material relay conveying chain with lower cutting, middle pumping and upper guiding, so that the sediment is conveyed upward and evenly dispersed as soon as it is peeled off, realizing the synergistic optimization of structural strength and fluid dynamics.

[0022] In use, the storage tank assembly of the present invention can be detachably coupled with an external magnetic drive mechanism: the magnetic drive mechanism surrounds the outer wall of the storage tank and generates a magnetic field that rotates around the circumference of the storage tank by sequential energization, thereby driving the stirrer to rotate non-contactly. This magnetic drive mechanism, as a reusable external service device, can be detachably coupled with the storage tank assembly, which serves as the storage and transportation container, to provide bucket-by-bucket homogenization without opening the tank.

[0023] In some embodiments, the magnetic drive mechanism includes two sets of arc-shaped clamping arms that match the shape of the outer wall of the storage bucket. The two sets of arc-shaped clamping arms surround the circumference of the storage bucket, and a plurality of electromagnetic pole units are embedded in the arc-shaped clamping arms along their arc direction. These units can be independently controlled to generate a magnetic field that rotates around the circumference of the storage bucket by changing the energizing sequence of each electromagnetic pole unit.

[0024] By fitting the arc-shaped clamping arm to the storage tank body and independently controlling several electromagnetic pole units, the magnetic drive mechanism is adapted to the storage tank, and the rotating magnetic field is flexibly controlled.

[0025] In some embodiments, the magnetic drive mechanism further includes a vibration module configured to output vibrational energy to the wall of the storage tank before or during stirring, in order to help break up the sediment layer.

[0026] In some embodiments, the magnetic drive mechanism further includes a torque feedback monitoring module, which is configured to monitor the drive current of the magnetic drive mechanism in real time, and determine the homogenization endpoint of the liquid material based on the changing trend of the drive current, and automatically stop driving when the homogenization endpoint is reached.

[0027] The beneficial effects of this invention are: 1. No need to open the container or handle it, keeping the packaging sealed and intact: The stir bar is placed inside the storage container as a pre-installed component before filling and sealing and is stored and transported with the container. When in use, it is driven non-contactly by a detachable magnetic drive mechanism on the outside of the container, completing the homogenization pretreatment without opening the container lid or moving the container body. The original factory seal level is completely maintained, meeting the requirements for the integrity of the packaging seal during the storage and transportation of containerized chemicals.

[0028] 2. Adaptive positioning and dynamic tracking of the stir bar at the sediment-supernatant interface: By designing the overall density of the stir bar to be between that of the supernatant and the sediment layer, and configuring an asymmetrical shape with the center of gravity at the bottom and the center of buoyancy at the top, the stir bar can automatically suspend at the sediment-supernatant interface without any active control, and automatically sink and follow as the sediment layer is broken up and the interface moves downward.

[0029] 3. Improved homogenization efficiency of the agitator: Through the one-to-one connection of the guide ridges, spiral ribs and scrapers, a continuous longitudinal reinforcement structure from the lower cone tip to the upper cone tip is constructed on the outer surface of the agitator. At the same time, a relay conveying chain is formed, which cuts and peels the material at the lower end, pumps and lifts it in the middle section, and disperses and guides it radially at the upper end.

[0030] 4. Good compatibility with storage and transportation: The stir bar is pre-placed inside the barrel and is in a free-floating state. It is not fixedly connected to the barrel body, does not change the structure of the barrel body and lid, does not affect the stacking, handling and conventional storage management of the barrel, and can be recycled. As an incremental modification of container internals, the cost is low.

[0031] 5. Extended effects when used in conjunction with other devices: When the storage tank assembly of the present invention is used in conjunction with the external magnetic drive device, the homogenization endpoint can be automatically identified and the operation stopped by collecting the trend of the driving current change. Vibration can also help loosen the agglomerated sediment layer, eliminating the need for manual judgment and ensuring good homogenization quality consistency. Attached Figure Description

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] Figure 1 This is a cross-sectional view of the stir bar and storage tank of the present invention.

[0034] Figure 2 This is a schematic diagram of the structure of the stir bar of the present invention.

[0035] Figure 3 This is a pre-use state diagram of the present invention.

[0036] Figure 4 This is a side view of the magnetic drive mechanism and storage bucket of the present invention.

[0037] Figure 5 This is a diagram showing the stacked state of the arc-shaped clamping arms of the present invention.

[0038] Figure 6 This is a schematic diagram of the arc-shaped clamping arm structure of the present invention.

[0039] Figure 7 This is a diagram showing the state of the storage bucket enclosed by the arc-shaped clamping arm of the present invention.

[0040] In the picture: 100. Movable chassis; 110. Linear lifting mechanism; 200. Magnetic drive mechanism; 210. Main seat; 220. Subseat 1; 230. Subseat 2; 240. Vertical drive module; 250. First arc-shaped clamping arm; 260. Second arc-shaped clamping arm; 270. Electromagnetic pole unit; 280. Contact roller; 300. Stirrer; 310. Upper conical section; 320. Middle main body; 321. Permanent magnet; 330. Lower conical section; 340. Spiral ridge; 350. Scraper; 351. Blade; 360. Guide ridge; 400. Torque feedback monitoring module; 500. Storage bucket; 510. Bucket body; 520. Bucket lid; 600. Vibration module. Detailed Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0042] Example 1: like Figure 1 , Figure 3 The image shows a first embodiment of the present invention, a magnetically driven homogenizing storage tank assembly, including a storage tank 500 and a stirrer 300 pre-placed inside the storage tank 500.

[0043] In this embodiment, the storage container 500 includes a container body 510 and a container lid 520 that can be sealed onto the container body 510. The container body 510 can be a conventional chemical storage and transportation container such as a closed-top steel drum or an HDPE plastic drum. An elastic sealing gasket is provided between the container lid 520 and the container body 510, and a compression structure is used to seal the lid, thereby meeting the requirements for packaging seal integrity during the storage and transportation of drummed chemicals. This invention does not change the existing structure of the container body 510 and the container lid 520.

[0044] In this embodiment, the stirrer 300 is placed into the storage tank 510 before or during the filling process, and is sealed and stored and transported together with the tank, and can be recycled and reused.

[0045] The stir bar 300 remains free within the storage tank 500, without any fixed connection to it, ensuring its free suspension and movement during storage based on changes in the position of the sediment-supernatant interface. The overall density of the stir bar 300 is configured between the density of the supernatant and the density of the sediment layer within the storage tank 500, allowing it to automatically suspend at the interface during storage and settling, neither sinking into the sediment layer and becoming buried or compacted, nor floating to the surface. During subsequent homogenization operations, when the sediment layer is broken up and the interface shifts downwards, the stir bar 300 automatically follows, maintaining dynamic tracking of the interface.

[0046] The 300 agitator is recyclable: after the liquid is used up, the agitator is removed from the container, cleaned, and then put into the next container for use.

[0047] In this embodiment, the maximum outer diameter of the stir bar 300 (the diameter d of the middle main body 320) is 1 / 5 to 1 / 4 of the inner diameter D of the storage tank 500. The upper cone tip of the stir bar 300 is kept at a safe distance of ≥50mm from the liquid surface to avoid air being drawn in during rotation.

[0048] Example 2: like Figure 1 , Figure 2 As shown in the figure, this embodiment further illustrates the structure of the stir bar 300. The stir bar 300 has a spindle-shaped rotating body structure, which includes an upper cone portion 310, a middle main body portion 320 and a lower cone portion 330 from top to bottom along its vertical axis. The three are injection molded into an integral structure.

[0049] In this embodiment, the outer shell of the stir bar 300 is made of injection-molded PPS (polyphenylene sulfide). Density adjustment cavities are provided in the upper cone 310 and the lower cone 330. The density adjustment cavities are filled with density adjustment filler. Depending on the density range of the target treatment agent, different density adjustment fillers can be selected, thereby achieving a configuration where the overall density of the stir bar 300 is between the density of the supernatant and the density of the sediment layer.

[0050] In this embodiment, a magnet mounting cavity is provided in the radial center region of the middle section main body 320, and a permanent magnet 321 is fixedly mounted therein. The permanent magnet 321 is preferably made of sintered neodymium iron boron (NdFeB) magnetic material, and is magnetized radially to form a pair of N and S magnetic poles. The permanent magnet 321 also serves as a counterweight, and its high density causes the center of gravity of the stir bar 300 to be biased towards the lower section of the middle section main body 320.

[0051] In this embodiment, the cone angle of the upper cone 310 is preferably 25°~35° (full cone angle), and the cone angle of the lower cone 330 is preferably 40°~55° (full cone angle). Under the conditions of the same axial length and the same diameter of the connection end with the middle main body 320, the volume of the upper cone 310 is larger than the volume of the lower cone 330. This causes the center of buoyancy of the stir bar 300 to be biased towards the upper side, while the center of gravity is biased towards the lower side due to the permanent magnets 321 being concentrated in the lower middle section. This forms a stable posture configuration with the center of buoyancy at the top and the center of gravity at the bottom, allowing the stir bar 300 to automatically return to a vertical posture with the bottom facing down in any tilted state.

[0052] In this embodiment, the outer surface of the middle main body 320 is provided with a plurality of spiral protrusions 340 extending spirally along the axial direction, and the spiral angle is preferably 20°~35°. The spiral direction of the spiral protrusions 340 matches the predetermined rotation direction of the stirrer 300, so that when the stirrer 300 rotates, it generates an axial thrust from bottom to top, driving the liquid material to flow from the lower cone 330 to the upper cone 310.

[0053] In this embodiment, the outer surface of the lower conical portion 330 is provided with a plurality of main plowing scrapers 350, which extend along the generatrix of the conical surface of the lower conical portion 330, and their top ends are connected to the bottom ends of the spiral protrusions 340 one by one. The lower end of the scraper 350 has a cutting edge 351, which faces forward of the rotation direction of the stirrer 300, and cuts into and peels off the sediment layer when the stirrer 300 rotates.

[0054] In this embodiment, the outer surface of the upper cone 310 is provided with a plurality of axially extending guide ridges 360, the bottom ends of the guide ridges 360 being connected to the top ends of the spiral ridges 340 one by one.

[0055] The guide ridges 360, spiral ribs 340, and scraper blades 350 are equal in number and corresponding in position, and are integrally formed during injection molding. Together, they form a continuous longitudinal reinforcement structure from the lower cone 330 through the middle main body 320 to the upper cone 310, significantly improving the bending and torsional strength of the stirrer 300. Simultaneously, the three components form a seamless material relay conveying chain: the scraper blades 350 cut and peel away sediment, the spiral ribs 340 axially pump and lift, and the guide ridges 360 radially disperse and guide the flow.

[0056] In this embodiment, the outer surface of the outer shell layer of the stirrer 300 is roughened by sandblasting of the injection mold cavity to enhance the viscous shear force at the liquid-solid interface.

[0057] Example 3: like Figure 1-7 As shown, this embodiment illustrates an external magnetic drive mechanism used in conjunction with the aforementioned storage bucket assembly. This mechanism also includes a movable chassis 100, on which the magnetic drive mechanism 200 is mounted. The movable chassis 100 and the magnetic drive mechanism 200 together constitute an external magnetic drive device.

[0058] In this embodiment, the magnetic drive mechanism 200 is installed on the drive end of the linear lifting mechanism 110. The magnetic drive mechanism 200 includes a main seat 210, a first sub-seat 220, a second sub-seat 230, and two sets of arc-shaped clamping arms. The main seat 210 is fixed to the drive end of the linear lifting mechanism 110, the first sub-seat 220 is fixed on the main seat 210, and the second sub-seat 230 is connected to the first sub-seat 220 through a vertical drive module 240. The vertical drive module can be a linear drive motor, a ball screw drive mechanism, etc., and its vertical lifting end is integrated with the second sub-seat 230. The first sub-seat 220 and the second sub-seat 230 are circumferentially staggered in the storage tank 500. The two sets of arc-shaped clamping arms are the first arc-shaped clamping arm assembly 250 and the second arc-shaped clamping arm assembly 260, respectively. Both the first and second sub-seats 220 and the second sub-seat 230 have arc-shaped slide rails formed around the storage bucket 500. The first arc-shaped clamping arm assembly 250 and the second arc-shaped clamping arm assembly 260 are slidably mounted on the arc-shaped slide rails of the first and second sub-seats 220 and the second sub-seat 230, respectively.

[0059] The arc-shaped clamping arms are circular arc-shaped, with their inner surfaces matching the arc-shaped surface of the storage tank 500. Several electromagnetic pole units 270 are embedded within each arc-shaped clamping arm. These units are arranged at equal intervals along the arc direction and have a certain length along the axial direction to ensure sufficient driving force for the stir bar 300 during its descent. The specific structure of the electromagnetic pole unit 270 is based on existing technology, including an iron core, excitation coil, and pole shoes. Each electromagnetic pole unit 270 is arranged in an alternating "NSNS" magnetization direction. A PWM-modulated drive current is supplied to the excitation coil of each electromagnetic pole unit 270 according to a predetermined timing sequence through a controller built into the arc-shaped clamping arms. This generates a magnetic field rotating circumferentially around the storage tank 500 within the space enclosed by the arc-shaped clamping arms, thereby driving the permanent magnet 321 of the stir bar 300 inside the tank to rotate synchronously with the rotating magnetic field. The circumferential movement of the arc-shaped clamping arms can be performed manually or electrically.

[0060] The arc angle corresponding to the arc-shaped clamping arm is 180 degrees. At the same time, the arc angle corresponding to the arc-shaped slide rail on the first seat 220 and the second seat 230 is 90 degrees. The arc angle corresponding to the arc-shaped clamping arm is 180 degrees. A contact roller 280 is provided at the end of the arc-shaped clamping arm to contact the outer wall of the storage tank 500 and to ensure that there is a certain gap between the electromagnetic pole unit 270 and the outer wall of the storage tank 500.

[0061] Before use, the vertical drive module 240 offsets the first and second slots 220 vertically. At this time, the first arc-shaped clamping arm assembly 250 and the second arc-shaped clamping arm assembly 260 are stacked vertically. When the movable chassis 100 moves radially, the contact rollers 280 on the first and second arc-shaped clamping arm assemblies 250 and 260 come into contact with the outer wall of the storage tank 500. The first and second arc-shaped clamping arm assemblies 250 and 260 are pushed circumferentially away from each other until they surround the storage tank 500 360°. Then, the vertical drive module 240 moves the second slot 230 down to be on the same horizontal plane as the first slot 220. At this time, one end face of the first slot 220 contacts one end face of the second slot 230; the end faces of the first and second arc-shaped clamping arm assemblies 250 and 260 are in contact. At this point, the built-in main controller can drive the stirring bar 300 in the barrel to rotate synchronously with the rotating magnetic field to each electromagnetic pole unit 270 according to a predetermined sequence, thereby stirring and homogenizing the mixture.

[0062] The working process of the storage bucket assembly and the external magnetic drive device in this embodiment is as follows: Step 1: During the liquid filling stage, the agitator 300 is placed into the storage tank 500 and sealed, so that the agitator 300 is stored in the tank as a pre-installed component.

[0063] Step 2: When it is necessary to perform homogenization pretreatment on the storage tank 500, the movable chassis 100 can be driven to the front of the target storage tank 500 and parked.

[0064] Step 3: The first arc-shaped clamping arm assembly 250 and the second arc-shaped clamping arm assembly 260 slide towards each other to clamp the barrel body 510 of the storage barrel 500, so that the electromagnetic pole unit 270 maintains a uniform gap with the barrel wall.

[0065] Step four: The main controller supplies power to each electromagnetic pole unit 270 according to a predetermined sequence, generating a rotating magnetic field that drives the stir bar 300 to rotate around its own axis. The stir bar 300 automatically suspends itself at the sediment-supernatant interface due to its density characteristics. The blade 351 of the scraper 350 cuts into the sediment layer, the spiral ribs 340 pump the cut material upwards, and the guide ridges 360 radially disperse the rising material, achieving circulation and homogenization. As the sediment layer is gradually broken up, the stir bar 300 automatically sinks to track the new interface.

[0066] Step 5: After homogenization is complete, the arc-shaped clamping arm resets and detaches from the barrel 510, and the movable base 100 moves to the next target barrel position. Throughout the process, the barrel lid 520 is not opened and the barrel 510 is not moved, ensuring the integrity of the packaging seal remains unaffected.

[0067] Example 4: like Figure 3 , Figure 4 As shown, this embodiment has the same basic structure as embodiment three, except that the external magnetic drive device also includes a torque feedback monitoring module 400 and a vibration module 600.

[0068] In this embodiment, the torque feedback monitoring module 400 includes a current sampling unit and a data processing unit. The current sampling unit is a precision sampling resistor (resistance value 0.01-0.1Ω) connected in series in the driving circuit of each electromagnetic pole unit 270. The voltage signal across the sampling resistor is amplified by a differential amplifier and then converted into a digital signal by an ADC analog-to-digital converter (sampling rate ≥1kHz, resolution ≥12 bits), which is then transmitted to the data processing unit. Alternatively, the current sampling unit uses a Hall effect current sensor (such as the ACS712 / ACS758 series) to non-contactly collect the driving current (current data) of each electromagnetic pole unit 270. After processing by a signal conditioning circuit, the data is transmitted to the data processing unit. The data processing unit has a built-in sliding window mean filter with a window width of N sampling points (N=50-200, corresponding to 0.05-0.2 seconds). This filter performs real-time smoothing filtering on the collected current data to eliminate high-frequency noise. The data processing unit then calculates the standard deviation σ and coefficient of variation CV=σ / μ (μ is the window mean) of the current data within the current window.

[0069] Homogenization is considered complete when the following conditions are met: (1) CV ≤ 5%, and duration is more than 30 seconds; (2) The ratio of the current window mean μ to the peak current μ0 during the initial startup phase is μ / μ0 ≤ 0.6 (i.e. the current drops to below 60% of the peak current).

[0070] The peak current μ0 is the maximum current value detected within the first 10 seconds after the stir bar 300 is started, representing the maximum load of the stir bar 300 when it rotates in the densest sediment layer.

[0071] It should be noted that there is a positive correlation between the rotational resistance experienced by the stirrer 300 and the excitation current: the greater the resistance, the higher the excitation current required to maintain synchronous rotation. When the stirrer 300 rotates in the sediment layer, the scraper 350 continuously cuts and peels away the sediment. The resistance experienced by the stirrer 300 is proportional to the thickness of the sediment layer and the yield stress of the sediment. As the sediment layer is gradually broken up, the yield stress of the sediment decreases, the resistance experienced by the stirrer 300 decreases, and the excitation current decreases accordingly. When the sediment is fully broken up and evenly dispersed in the liquid, the stirrer 300 naturally sinks to the bottom of the storage tank 500, where the resistance decreases to a minimum and tends to stabilize, and the excitation current also tends to stabilize.

[0072] The data processing unit is located in the electrical control box inside the movable chassis 100 and is communicatively connected to the main controller. The data processing unit (using existing technology) is configured to determine the load state of the stirrer 300 based on the changing trend of the excitation current. By identifying the aforementioned current change characteristics, the homogenization endpoint of the liquid is determined. When the homogenization endpoint is determined, a stop signal is sent to the main controller to automatically stop the magnetic drive.

[0073] In this embodiment, the vibration module 600 can be installed on the opposite sides of the first and second sub-seats 220 via corresponding brackets. The vibration module 600 adopts existing technology, and is located on the upper side of the corresponding arc-shaped clamping arm and close to the arc-shaped clamping arm. Its vibration output end extends out and contacts the outer wall of the barrel 510. When it does not extend out, it will not interfere with other components, such as the arc-shaped clamping arms stacked on top of each other.

[0074] In this embodiment, the vibration module 600 can be an existing structure with different vibration modes, such as a low-frequency high-amplitude vibration mode, a mid-frequency resonance mode, and a high-frequency micro-vibration mode. The low-frequency high-amplitude vibration mode is used to break up hardened agglomerated sediment layers. In this mode, the vibration energy is relatively large, which can generate macroscopic cracks inside the sediment layer, reducing its overall strength. The mid-frequency resonance mode is used to loosen gelatinous or compacted sediment layers. This mode utilizes the resonance effect generated when the vibration frequency is close to the natural frequency of the sediment layer, significantly reducing the contact force between particles inside the sediment layer. The high-frequency micro-vibration mode is used to assist the stirrer 300 in dispersing fine particles. This mode operates continuously during stirring to prevent the dispersed particles from re-agglomerating.

[0075] The vibration module 600 can operate in accordance with the following logic: When the torque feedback monitoring module 400 detects that the excitation current of the stir bar 300 exceeds 150% of the rated value when it starts, it determines that the sediment layer has been caking. The vibration module 600 first starts the low-frequency high-amplitude vibration mode for 30 to 60 seconds, causing microcracks to be generated inside the caking layer.

[0076] After the vibration ends, the main controller attempts to start the stirrer 300 again. If the excitation current is still higher than 150% of the rated value, it switches to the medium-frequency resonance mode and continues for 20-40 seconds to further loosen the sediment layer.

[0077] Once the stirrer 300 starts normally and enters stable rotation, the vibration module 600 switches to high-frequency micro-vibration mode and continues to work during the stirring process to help maintain the suspension of the dispersed particles.

[0078] If the stirrer 300 still fails to start normally after the combined action of low-frequency high-amplitude vibration and mid-frequency resonance mode (excitation current continuously exceeds 200% of the rated value), the main controller determines that the liquid in the storage tank 500 has exceeded the processing capacity of this component, automatically issues an alarm signal and refuses to start.

[0079] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A magnetically driven homogenizing storage bucket assembly, characterized in that: include Storage bucket (500), including bucket body (510) and bucket lid (520) that can be sealed onto bucket body (510); A stirrer (300) is pre-placed in the storage tank (510) before the liquid is filled and sealed, and is stored and transported together with the storage tank (500); the stirrer (300) is in a free state inside the storage tank (500) and is not fixedly connected to the storage tank (500); the stirrer (300) includes a permanent magnet (321), the overall density of which is configured to be between the density of the supernatant and the density of the sediment in the storage tank (500), so that the stirrer (300) automatically floats at the interface between the supernatant and the sediment in a static state, and automatically sinks as the sediment is broken up and the interface moves down; The stir bar (300) is configured to rotate non-contactly under the action of a rotating magnetic field generated outside the storage tank (500) by an external magnetic drive mechanism (200) to homogenize the liquid in the tank while keeping the lid (520) sealed. The stirrer (300) includes, in sequence along its vertical axis, an upper conical part (310), a middle main body part (320), and a lower conical part (330). The center of gravity of the stir bar (300) is biased towards the lower cone (330) relative to its geometric center, and the center of buoyancy is biased towards the upper cone (310) relative to its geometric center.

2. The magnetically driven homogenizable storage tank assembly according to claim 1, characterized in that: The cone angle of the upper cone (310) is smaller than that of the lower cone (330).

3. The magnetically driven homogenizable storage tank assembly according to claim 1, characterized in that: The outer surface of the middle section main body (320) is provided with a plurality of spiral protrusions (340) extending along the axial direction. The spiral protrusions (340) are configured to generate axial thrust when the stirrer (300) rotates, driving the liquid material to flow from the lower cone (330) to the upper cone (310).

4. The magnetically driven homogenizing storage tank assembly according to claim 1, characterized in that: The outer surface of the lower cone (330) is provided with a plurality of scrapers (350), and the lower end of the scraper (350) is provided with a cutting edge (351), which faces the front of the stirring element (300) in the direction of rotation.

5. The magnetically driven homogenizable storage tank assembly according to claim 1, characterized in that: The outer surface of the upper cone (310) is provided with a plurality of guide ridges (360) extending along the axial direction.

6. The magnetically driven homogenizable storage tank assembly according to claim 1, characterized in that: The bottom end of the guide ridge (360) provided on the upper cone (310) is connected one-to-one with the top end of the spiral ridge (340) provided on the outer surface of the middle main body (320).

7. The magnetically driven homogenizable storage tank assembly according to claim 1, characterized in that: The top of the scraper (350) provided on the outer surface of the lower cone (330) is connected one-to-one with the bottom of the spiral protrusion (340) provided on the outer surface of the middle main body (320).

8. The magnetically driven homogenizable storage tank assembly according to claim 1, characterized in that: The guide ridge (360) provided on the upper cone (310), the spiral ridge (340) provided on the outer surface of the middle main body (320), and the scraper (350) provided on the outer surface of the lower cone (330) together constitute a continuous longitudinal reinforcement structure from the lower cone (330) through the middle main body (320) to the upper cone (310).

9. The magnetically driven homogenizable storage tank assembly according to claim 1, characterized in that: The maximum outer diameter d of the stir bar (300) is 1 / 5 to 1 / 4 of the inner diameter D of the barrel (510); When the stir bar (300) is suspended at the interface, the distance between its upper end and the liquid surface is not less than 50 mm.

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