Grinding equipment and method for selenium-enriched konjak milk tea powder blocks

Abstract

The invention discloses grinding equipment and method for selenium-enriched konjak milk tea powder blocks, and relates to the technical field of food processing equipment, the grinding equipment comprises a grinding magnetic cavity, a rotary permanent magnet assembly and a spiral grinding assembly; the rotary permanent magnet assembly is arranged outside the grinding magnetic cavity and provided with a plurality of sets of permanent magnets, and the permanent magnets rotate outside the grinding magnetic cavity and do not make contact with one another. Oxidative decomposition of selenium-rich particles caused by contact between high temperature and oxygen is fundamentally blocked, activity of functional components is ensured, through triple effects of spiral shearing, ultrasonication and gap dynamic adjustment, the viscous agglomeration problem of konjaku flour is solved, adaptive grinding of materials with different hardness is achieved, the granularity consistency of finished products is remarkably improved, and the quality of the finished products is improved. And meanwhile, residues can be thoroughly removed without disassembling equipment in a liquid sublimation cold blasting cleaning mode, so that cross contamination is avoided.

Description

Technical Field

[0001] This invention relates to the field of food processing equipment technology, specifically to grinding equipment and methods for selenium-enriched konjac milk tea powder blocks. Background Technology

[0002] Selenium-enriched konjac milk tea powder is a new type of health food that combines selenium-enriched functional ingredients, konjac glucomannan, and milk tea flavoring substances. Its core value lies in preserving the bioactivity of selenium (such as selenomethionine and selenocysteine), while utilizing the gelling and water-holding properties of konjac glucomannan to enhance the product's taste.

[0003] Currently, in the grinding process of selenium-enriched konjac milk tea powder blocks, traditional grinding equipment (such as hammer mills and high-speed blenders) relies on mechanical shearing force for grinding. During the process, local high temperatures (usually >60℃) are generated due to friction. The high viscosity of konjac powder itself, on the one hand, the viscous matrix hinders the contact between selenium-enriched particles and external heat dissipation media (such as air), making it difficult for local high temperatures to dissipate and aggravating oxidation (the selenium loss rate in the coated area is much higher than that in the uncoated area). On the other hand, the viscosity prevents the selenium-enriched particles from freely dispersing, and the superimposed density difference further amplifies the uneven distribution, thereby reducing the functionality of the product and affecting the eating effect. Therefore, it is necessary to propose grinding equipment and methods for selenium-enriched konjac milk tea powder blocks. Summary of the Invention

[0004] The purpose of this invention is to provide a grinding device and method for selenium-enriched konjac milk tea powder blocks, in order to solve the problems mentioned in the background art. In the grinding process of selenium-enriched konjac milk tea powder blocks, traditional grinding equipment (such as hammer mills and high-speed blenders) relies on mechanical shearing force for grinding. During the process, local high temperatures (usually >60°C) are generated due to friction. The high viscosity of konjac powder itself, on the one hand, the viscous matrix hinders the contact between selenium-enriched particles and external heat dissipation media (such as air), making it difficult for local high temperatures to diffuse and aggravating oxidation (the selenium loss rate in the coated area is much higher than that in the uncoated area). On the other hand, the viscosity prevents the selenium-enriched particles from freely dispersing, and the superimposed density difference further amplifies the uneven distribution, thereby reducing the functionality of the product and affecting the eating effect.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a grinding device for selenium-enriched konjac milk tea powder blocks, comprising a grinding magnetic cavity, a rotating permanent magnet assembly, and a spiral grinding assembly; The rotating permanent magnet assembly is installed outside the grinding magnetic cavity. It has multiple sets of permanent magnets, which rotate in opposite directions outside the grinding magnetic cavity without contacting each other. The spiral grinding assembly is installed at the bottom of the grinding magnetic cavity, and a conical flow guide tube is connected between it and the grinding magnetic cavity. Magnetic bead catchers are symmetrically installed on both sides of the conical flow guide tube, which are used to catch magnetic particles injected into the grinding magnetic cavity. The spiral grinding assembly includes a cavity, inside which a spiral component is installed. Plasma nozzles are symmetrically plugged into the outer sides of the top of the cavity. Ultrasonic transducers are staggered inside the cavity. Temperature sensors are embedded in the surface of the cavity. Sliding sealing frames are symmetrically installed on both sides of the cavity. A spacing adjustment component is slidably connected inside the sliding sealing frame. A miniature electromagnetic guide rod is installed on the side end of the spacing adjustment component.

[0006] Preferably, the top of the grinding magnetic cavity is connected to a feeding and crushing chamber, the bottom of the feeding and crushing chamber is connected to a semi-circular grinding cavity, a bearing grinding disc is installed inside the grinding magnetic cavity, an electric iris valve is installed at the bottom of the grinding magnetic cavity, a frequency-modulated vibrating screen is installed at the bottom of the electric iris valve, and an opening and closing valve is installed at the bottom of the conical flow guide cylinder, which is used to intercept materials carrying magnetic particles, so that the magnetic bead catcher can capture the magnetic particles and then open the valve.

[0007] Preferably, an inert gas regulating component is installed on the outside of the side end of the cavity. The inert gas regulating component includes an inert gas chamber, which is sleeved on the outside of the side end of the cavity. The top of the inert gas chamber is connected to a gas riser pipe, the top of the gas riser pipe is connected to a gas delivery structure, the side end of the gas delivery structure is connected to a closed return pipe, and the side end of the gas delivery structure is connected to a gas delivery pipe. The gas delivery pipe is connected to the cavity.

[0008] Preferably, a drive structure assembly is installed on the side end of the spiral component, and a drive mounting frame is installed on the side end of the drive structure assembly. The drive mounting frame is used to install a drive variable frequency motor. The drive structure assembly includes a synchronous pulley. The bottom synchronous pulley center end of the synchronous pulley is connected to the spiral component, and the top synchronous pulley center end of the synchronous pulley is connected to a synchronous rod. A frame support rod is sleeved on the outside of the synchronous rod.

[0009] Preferably, a bevel gear structure is installed on the side end of the synchronizing rod, and an electromagnetic interruptor is installed at the connection end between the synchronizing rod and the bevel gear structure. The bevel gear structure consists of two bevel gears. One set of bevel gears is connected to a drive rod, and the side end of the other set of bevel gears passes through the frame support rod via a keying rod and is connected to a drive pinion. A shock-absorbing plate is installed on the side end of the drive pinion. There are two drive pinions, and the top ends of the two drive pinions are meshed with drive gears. A crushing component is connected to the side end of the drive gear. A crushing ball is connected to the bottom of the drive rod. A secondary grinding disc is sleeved on the outside of the crushing ball. A primary grinding disc is installed on the top side of the drive rod. The primary grinding disc and the semi-circular grinding cavity form a primary grinding layer structure, and the secondary grinding disc and the support grinding disc form a secondary grinding layer structure.

[0010] Preferably, the rotating permanent magnet assembly further includes a connecting frame, the bottom of which is provided with an annular groove, and an annular guide rail is provided inside the annular groove. Multiple sets of permanent magnets are connected to positioning slides on the annular guide rail.

[0011] Preferably, a magnetic particle injector is installed on the outside of one side of the frame support rod. The bottom of the magnetic particle injector is connected to a side guide cavity. There is a gap between the primary grinding disc and the grinding magnetic cavity. The side guide cavity is located in the gap and is used to inject magnetic particles into the grinding magnetic cavity.

[0012] Preferably, the top of the magnetic particle injector is connected to a circulation guide tube, and the side end of the circulation guide tube is connected to a magnetic bead catcher.

[0013] Preferably, a discharge end is provided at the bottom of the side of the cavity, and an external quick-release vibrating screen structure is provided at the bottom of the discharge end for screening during discharge.

[0014] A method for using a grinding device for selenium-enriched konjac milk tea powder blocks includes the following steps: S1. First, the selenium-enriched konjac milk tea powder blocks are initially crushed by the agitator in the feeding and crushing chamber. Then, they undergo two stages of grinding: first-stage grinding with a semi-circular grinding chamber, and second-stage grinding with a supporting grinding chamber. Simultaneously, selenium-enriched particles are injected into the grinding chamber via a magnetic particle injector. Nanomagnetic cores (magnetic particles); S2. Next, the permanent magnet of the rotating permanent magnet assembly rotates to generate a rotating magnetic field, which drives the magnetic particles to diffuse in the material in a directional manner. After the mixed material is screened by the electric iris valve and the frequency-modulated vibrating screen, when it passes through the conical flow guide tube, the opening and closing valve is closed, and the magnetic bead catcher captures the residual magnetic particles (which are returned and reused through the circulation guide pipe). Then the opening and closing valve is opened, and the material enters the spiral grinding assembly. S3. Next, the screw conveyor rotates to transport the material. Argon gas is introduced through the inert gas regulating component. The plasma nozzle ionizes and generates low-temperature plasma (-10℃-20℃, with real-time temperature control via an external PLC controller). The ultrasonic transducer (20-40kHz) works in conjunction with the screw shear force to break up agglomerates. The micro electromagnetic guide rod drives the spacing adjustment component to dynamically adjust the grinding spacing (0.5-2mm), completing the fine grinding process. S4. After that, the material is discharged through the discharge end and screened by an external vibrating screen to obtain the finished product; after each batch, liquid is injected into the whole. The residual powder is removed by sublimation cold explosion, and the cleaned cavity is dried by inert gas in preparation for the next batch of operations.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, by using a spiral grinding assembly, the synergistic effect of low-temperature plasma and inert gas is utilized to fundamentally prevent the oxidative decomposition of selenium-rich particles caused by high-temperature contact with oxygen, ensuring the activity of functional components. Through the triple action of spiral shearing, ultrasonic crushing, and dynamic gap adjustment, the problem of sticky agglomeration of konjac flour is solved, and the adaptability of grinding materials with different hardness is achieved, significantly improving the consistency of finished product particle size. At the same time, the liquid sublimation cold explosion cleaning method can completely remove residues without disassembling the equipment, avoiding cross-contamination.

[0016] 2. In this invention, with the cooperation of a rotating permanent magnet assembly, the magnetic particles carrying selenium-rich particles are directionally diffused by a rotating magnetic field, so that the selenium-rich particles and konjac powder form a uniformly mixed material (solving the problem of uneven selenium distribution). The magnetically homogenized material is then sequentially screened by an electric iris valve and a frequency-modulated vibrating screen, and then enters the spiral grinding assembly through a conical flow guide cylinder. With the cooperation of the rotating permanent magnet assembly, the selenium-rich particles in the material are evenly dispersed, so that the low-temperature plasma generated by the plasma nozzle of the spiral grinding assembly can more evenly cover each selenium-rich particle, avoiding cold quenching dead zones caused by excessively high local selenium concentration, ensuring more stable retention of the activity of the selenium-rich components. At the same time, the uniformly mixed material reduces the agglomeration resistance of the spiral components during spiral shearing and ultrasonic crushing during operation, making the dynamic gap adjustment of the spacing adjustment component more precise (without the need for frequent adjustments due to local hard agglomeration), improving grinding efficiency and particle size consistency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of the grinding equipment for selenium-enriched konjac milk tea powder blocks according to the present invention; Figure 2 This is a side view of the structure of the grinding equipment for selenium-enriched konjac milk tea powder blocks according to the present invention; Figure 3This is a schematic diagram of the internal cross-sectional structure of the main body of the grinding equipment for selenium-enriched konjac milk tea powder blocks according to the present invention. Figure 4 This is a schematic diagram of the drive structure component in the grinding equipment for selenium-enriched konjac milk tea powder blocks according to the present invention. Figure 5 This invention relates to a grinding equipment for selenium-enriched konjac milk tea powder blocks. Figure 4 A magnified structural diagram at point A; Figure 6 This is a schematic diagram of the installation position of the inert gas regulating component in the grinding equipment for selenium-enriched konjac milk tea powder blocks according to the present invention. Figure 7 This is a schematic diagram of the rotating permanent magnet assembly in the grinding equipment for selenium-enriched konjac milk tea powder blocks according to the present invention. Figure 8 This is a schematic diagram of the frequency-modulated vibrating screen and the on / off valve in the grinding equipment for selenium-enriched konjac milk tea powder blocks according to the present invention. Figure 9 This is a schematic diagram of the spiral grinding component in the grinding equipment for selenium-enriched konjac milk tea powder blocks according to the present invention. Figure 10 This invention relates to a grinding equipment for selenium-enriched konjac milk tea powder blocks. Figure 9 A magnified structural diagram at point B.

[0018] In the diagram: 100, Drive mounting frame; 200, Inert gas regulating assembly; 201, Inert gas chamber; 202, Gas riser pipe; 203, Gas conveying structure; 204, Closed return pipe; 300, Drive structure assembly; 301, Synchronous pulley; 302, Synchronous rod; 304, Crushing ball; 305, First-stage grinding disc; 306, Crushing component; 307, Bevel gear structure; 308, Frame support rod; 309, Vibration damping plate; 310, Drive gear; 311, Drive pinion; 400, Feeding and crushing chamber; 500, Grinding magnetic chamber; 600, Rotating permanent magnet assembly; 601. Connecting frame; 602, annular trough; 603, annular guide rail; 604, permanent magnet; 700, conical flow guide cylinder; 800, magnetic bead catcher; 900, spiral grinding assembly; 901, cavity; 902, spiral component; 903, spacing adjustment component; 904, miniature electromagnetic guide rod; 120, plasma nozzle; 130, magnetic particle injector; 140, side guide cavity; 150, semi-circular grinding cavity; 160, bearing grinding disc; 170, secondary grinding disc; 180, electric iris valve; 190, circulating guide pipe; 210, discharge end; 220, frequency-modulated vibrating screen; 230, opening and closing valve. Detailed Implementation

[0019] 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.

[0020] In an embodiment of the present invention, reference is made to Figures 1-3 and Figure 6 The image shows a grinding device for selenium-enriched konjac milk tea powder blocks, comprising a grinding magnetic cavity 500, a rotating permanent magnet assembly 600, and a spiral grinding assembly 900. The grinding magnetic cavity 500, through its internal structure, achieves secondary grinding of the material and magnetic dispersion of the selenium-enriched particles. Magnetic control mixing ensures efficient grinding and retention of the selenium-enriched components. The rotating permanent magnet assembly 600 generates a rotating magnetic field, driving the magnetic particles to diffuse directionally within the konjac powder, achieving a uniform distribution of the selenium-enriched particles. The spiral grinding assembly 900 protects the selenium-enriched components through low-temperature plasma quenching and achieves fine grinding through ultrasonic vibration and spiral shearing. It also possesses self-cleaning capabilities, achieved by injecting liquid into the assembly through an external liquid injection structure. (-78℃, 0.5MPa), using The cold explosion effect during sublimation removes residual powder particles, eliminating the need for machine shutdown, disassembly, and cleaning.

[0021] In some embodiments, according to Figures 1-3 , Figure 6 , Figure 9 and Figure 10As shown, the spiral grinding assembly 900 includes a cavity 901, the inner wall of which can be coated with a polytetrafluoroethylene-nano silica composite anti-stick coating. A spiral component 902 is installed inside the cavity 901, consisting of a central shaft and spiral blades. The spiral blades have an array of guide holes (inclined at 45°) on their surface, which can generate axial pushing force and radial shear force during rotation, propelling the material forward while enhancing the grinding effect. Plasma nozzles 120 are symmetrically plugged into the outer sides of the top of the cavity 901. The outlet of the plasma nozzles 120 extends into the cavity 901 (5-8 cm above the spiral blades), and its spray direction is consistent with the rotation direction of the spiral blades (co-current spraying), ensuring that the low-temperature plasma can diffuse uniformly with the material flow direction. Ultrasonic transducers are interspersed inside the cavity 901. The surface of the ultrasonic transducer is flush with the inner wall of the cavity 901 (to avoid material retention), and can generate high-frequency vibration to break up material agglomerates. A temperature sensor is embedded in the surface of the cavity 901 to monitor the temperature of the grinding area in real time. The temperature sensor signal is transmitted to an external PLC controller through a shielded wire to realize closed-loop temperature control. Sliding sealing frames are symmetrically installed on both sides of the cavity 901, with built-in wear-resistant guide sleeves. A gap adjustment component 903 is slidably connected inside the sliding sealing frame. The gap adjustment component 903 is set as an arc plate structure (adapted to the curvature of the spiral blade). Its two ends are embedded in the guide grooves of the sliding sealing frame and can slide radially along the cavity 901. A miniature electromagnetic guide rod 904 is installed on the side end of the gap adjustment component 903. It drives the adjustment component to move closer to or away from the spiral blade through electromagnetic force to realize dynamic control of the grinding gap.

[0022] An inert gas regulating component 200 is installed on the outside of the side end of the cavity 901. The inert gas regulating component 200 includes an inert gas chamber 201, which is sleeved on the outside of the side end of the cavity 901. The inert gas chamber 201 has a double-layer jacket structure (the inner layer is attached to the outer wall of the cavity 901, and the outer layer is an insulation layer). It stores high-purity inert gas (such as argon). The top of the inert gas chamber 201 is connected to a gas riser pipe 202. The top of the gas riser pipe 202 is connected to a gas delivery structure 203. The gas delivery volume can be precisely adjusted by a built-in mass flow controller. The side end of the gas delivery structure 203 is connected to a closed return pipe 204 to form a gas circulation loop to avoid gas waste. The side end of the gas delivery structure 203 is connected to a gas delivery pipe, which is connected to the cavity 901 to ensure that the inert gas enters the grinding area at the spiral component 902 evenly.

[0023] According to this embodiment, specifically: First, the material (containing uniformly dispersed selenium-rich particles and konjac powder) after being processed by the grinding magnetic cavity 500 enters the feed end of the cavity 901 through the conical flow guide cylinder 700. The spiral component 902 starts to rotate (clockwise) under the drive of the drive structure. The pushing force of the blades of the spiral component 902 causes the material to move along the axial direction of the cavity 901. At this time, the spacing adjustment component 903 slowly approaches the spiral blades under the drive of the micro electromagnetic guide rod 904, reducing the grinding gap and forming preliminary shearing and grinding on the material, breaking up the residual small particle agglomerates.

[0024] Simultaneously, after the material enters the middle section of cavity 901, the gas delivery structure 203 is activated, and argon gas is continuously injected into the cavity 901 through the gas delivery pipe, gradually replacing the air inside the cavity (to prevent the oxidation of selenium-rich particles). At this time, the plasma nozzle 120 is powered on and started, using a radio frequency electric field (RF electric field frequency such as 13.56MHz) and power range (such as 50-200W) to ionize the argon gas into low-temperature plasma (temperature such as 50-100℃). The plasma diffuses with the argon gas flow to the entire grinding area, forming a cold quenching environment, and uses the low-temperature characteristics of the plasma to absorb the frictional heat generated by spiral grinding. Combined with the heat insulation effect of inert gas, the internal temperature of cavity 901 is kept stable.

[0025] During this process, the temperature sensor monitors the temperature inside the cavity in real time. If the temperature is higher than the set value, the external PLC controller increases the argon flow rate through the gas delivery structure 203 and increases the power of the plasma nozzle 120 to enhance the cooling effect. If the temperature is too low, the argon flow rate and plasma power are reduced to ensure that the selenium-rich particles remain active at a suitable temperature.

[0026] The material continues to move with the screw 902 to the rear section of the cavity 901. The external PLC controller starts the ultrasonic transducer, and the high-frequency vibration (transmitted to the material through the wall of the cavity 901) breaks down the sticky colloidal structure in the konjac powder, releasing the selenium-rich particles from the colloidal encapsulation. At the same time, the micro-jet generated by the vibration acts on the particle surface, further refining the particle size. At this time, the gap adjustment component 903 dynamically adjusts the gap according to the grinding state of the material (such as judging the material hardness through the torque feedback of the screw 902). If the material is hard (torque increases), the micro electromagnetic guide rod 904 drives the gap adjustment component 903 away from the screw 902, so that the gap is appropriately increased to avoid equipment overload. If the material is already fine (torque decreases), the gap is reduced to enhance the shearing effect and ensure uniform particle size of the finished product.

[0027] After fine grinding, the material moves with the screw 902 to the discharge end 210 of the cavity 901, and enters the external quick-release screening device through the outlet of 210. When a batch of material is ground, the screw 902 stops rotating, the spacing adjustment component 903 returns to the maximum gap, and the plasma nozzle 120 and ultrasonic transducer are turned off. Subsequently, liquid is injected into the entire structure using the external liquid injection structure. This makes the liquid Upon contact with the residual heat inside cavity 901, the substance rapidly sublimates, causing a dramatic expansion and a cold explosion effect. This peels off the sticky residue adhering to the spiral component 902, the spacing adjustment component 903, and the inner wall of cavity 901. The residue is then carried away by the heat. The airflow is discharged from the discharge end 210, completing the initial cleaning.

[0028] Finally, argon gas is reintroduced into the gas delivery structure 203 to purge residual CO2 and impurities from the cavity 901, ensuring that the next batch of materials is not contaminated and the entire process is repeated.

[0029] The overall process utilizes the synergistic effect of low-temperature plasma and inert gas to fundamentally prevent the oxidative decomposition of selenium-rich particles caused by high-temperature contact with oxygen, ensuring the activity of functional components. Through a triple action of spiral shearing, ultrasonic crushing, and dynamic gap adjustment, it not only solves the problem of konjac flour's stickiness and agglomeration but also achieves adaptable grinding of materials with different hardness, significantly improving the uniformity of the finished product's particle size. Simultaneously, the liquid... The sublimation-based cold blasting cleaning method can completely remove residues without disassembling the equipment, avoiding cross-contamination.

[0030] In some embodiments, according to Figure 1 , Figure 2 and Figure 7 As shown, the rotating permanent magnet assembly 600 is installed outside the grinding magnetic cavity 500. It has multiple sets of permanent magnets 604, which rotate in phase outside the grinding magnetic cavity 500 and do not contact each other.

[0031] The rotating permanent magnet assembly 600 further includes a connecting frame 601, an annular groove 602 is provided at the bottom of the connecting frame 601, an annular guide rail 603 is provided inside the annular groove 602, and multiple sets of permanent magnets 604 are connected to the positioning slides on the annular guide rail 603.

[0032] According to this embodiment, specifically: firstly, when the material reaches the preset grinding degree in the grinding magnetic cavity 500, the external PLC controller sends a start command to the rotating permanent magnet assembly 600, so that the positioning slide moves in a circle along the annular guide rail 603, and multiple sets of permanent magnets 604 rotate synchronously with the slide (the rotation direction is consistent with the stirring direction inside the grinding magnetic cavity 500 to avoid magnetic field disturbance).

[0033] As the permanent magnet 604 rotates, the magnetic field distribution around it changes dynamically with its position, forming a rotating magnetic field in the grinding magnetic cavity 500. That is, the magnetic force is transmitted from the outer wall of the grinding magnetic cavity 500 to the center, acting on the magnetic particles in the grinding magnetic cavity 500.

[0034] When the permanent magnet 604 rotates to a certain position, the magnetic particles near that side are attracted by the magnetic field and move towards the wall of the grinding magnetic cavity 500. When the permanent magnet 604 moves away, the magnetic force weakens, and the particles diffuse towards the center of the grinding magnetic cavity 500 under the action of material flow. Utilizing the cyclic effect of attraction and dispersion formed, the magnetic particles (loaded with selenium-rich particles) undergo a spiral diffusion motion under the guidance of the rotating magnetic field, gradually penetrating into various areas of the konjac flour.

[0035] During this process, the movement trajectory of the magnetic particles is coordinated with the stirring direction of the material. The bearing grinding disc 160 and the secondary grinding disc 170 in the grinding magnetic cavity 500 continue to rotate, driving the overall flow of the material. Under the drive of the magnetic field force, the magnetic particles pass through the material flow, breaking the stratification trend of selenium-rich particles and konjac powder, and achieving uniform mixing.

[0036] If the material concentration in the grinding magnetic cavity 500 is high (such as in the initial stage), the external PLC controller can change the rotation speed of the permanent magnet 604 by adjusting the rotation speed of the annular guide rail 603, so that the frequency of magnetic field change matches the material flow speed, and prevent magnetic particles from failing to diffuse due to excessive resistance. As the material gradually becomes finer and the fluidity increases, the rotation speed of the annular guide rail 603 can be appropriately reduced to reduce energy consumption while maintaining the stable effect of the magnetic field force.

[0037] Furthermore, if uneven distribution of selenium-rich particles is detected in a local area inside the grinding magnetic cavity 500 (as fed back by subsequent screening data), the magnetic field effect in that area is strengthened to improve the mixing effect in a targeted manner. When the mixing time of the material in the grinding magnetic cavity 500 reaches the preset value, the external PLC controller issues a stop command, causing the annular guide rail 603 to gradually stop, and the permanent magnet 604 returns to its initial position along with the positioning slide. Subsequently, the electric iris valve 180 at the bottom of the grinding magnetic cavity 500 is opened, and the mixed material enters the frequency-modulated vibrating screen 220 for screening, while the rotating permanent magnet assembly 600 is in standby mode, waiting for the processing command of the next batch of material.

[0038] The entire process utilizes a rotating magnetic field to drive the directional diffusion of magnetic particles, overcoming the limitations of traditional mechanical stirring where the outer layer is well mixed but the central area is weak. This significantly reduces the distribution deviation of selenium-enriched particles in konjac flour and avoids the loss of selenium activity caused by high-shear stirring. Furthermore, considering the high viscosity of konjac flour, the diffusion movement of magnetic particles is not affected by the viscosity of the material, and it can maintain efficient mixing even at high concentrations, thus improving the uniformity of mixing between selenium-enriched particles and konjac flour.

[0039] In some embodiments, according to Figures 1-3 , Figure 6 and Figure 8 As shown, the top of the grinding magnetic cavity 500 is connected to the feeding and crushing cavity 400, which is equipped with a high-speed rotating crushing component 306 inside. This component can crush large pieces of selenium-rich konjac milk tea powder into small particles (for easier subsequent grinding). The top of the feeding and crushing cavity 400 is equipped with a feed inlet (with a sealing cap), and the bottom is connected to the semi-circular grinding cavity 150 via an inclined guide plate. The bottom end of the feeding and crushing cavity 400 is connected to the semi-circular grinding cavity 150, which has a semi-circular groove structure (fitting with the primary grinding disc 305). The inner wall is machined with wear-resistant textures, and the side end is equipped with a discharge port (aligned with the grinding magnetic cavity 500). The grinding magnetic cavity 500 contains a receiving and initial grinding chamber 400 for receiving crushed material and grinding it. Inside the grinding magnetic cavity 500 is a bearing grinding disc 160, mounted on the inner wall of the grinding magnetic cavity 500, with raised grinding ridges on its surface. A secondary grinding disc 170 (located above the bearing grinding disc 160, rotatable, with a groove on its bottom to fit the bearing grinding disc 160) and the secondary grinding disc 170 form a two-stage grinding structure. A side guide cavity 140 interface (connected to a magnetic particle injector 130) is provided on the side wall of the grinding magnetic cavity 500 for injecting selenium-rich particles. The nano-magnetic cores (particle size range, such as 20-100nm) are used in the grinding magnetic cavity 500. An electric iris valve 180 is installed at the bottom of the electric iris valve 180. A frequency-modulated vibrating screen 220 is installed at the bottom of the electric iris valve 180 to screen out large particles of impurities in the material (impurities are discharged from the edge of the frequency-modulated vibrating screen 220, and qualified materials fall into the conical flow guide cylinder 700). An on-off valve 230 is installed at the bottom of the conical flow guide cylinder 700 to intercept materials carrying magnetic particles. This allows the magnetic bead catcher 800 to capture the magnetic particles before opening the valve. The magnetic bead catcher 800 is an arc-shaped electromagnet (surface covered with a magnetic plate) that can generate a strong magnetic field. The on-off valve 230 (a ball valve structure with automatic control function) is installed at the bottom to temporarily intercept materials and work with the magnetic bead catcher 800 to complete the capture of magnetic particles.

[0040] According to this embodiment, specifically: First, the operator puts the selenium-enriched konjac milk tea powder into the feed inlet of the feeding and crushing chamber 400, closes the sealing cover, and starts the equipment. The crushing component 306 rotates at high speed, and the blades cut and tear the powder into smaller particles. The crushed particles fall into the semi-circular grinding chamber 150 under the action of gravity through the inclined guide plate. Then, the primary grinding disc 305 above the semi-circular grinding chamber 150 rotates and cooperates with the semi-circular grinding chamber 150 to perform preliminary grinding on the crushed particles (grinding the particles to a finer state through compression and friction). The material after preliminary grinding enters the grinding magnetic chamber 500 through the discharge port.

[0041] After entering the grinding magnetic cavity 500, the material falls onto the supporting grinding disc 160. The secondary grinding disc 170 rotates, forming a shearing and grinding action with the supporting grinding disc 160, further grinding the material into a fine powder state. At the same time, the magnetic particle injector 130 injects selenium-rich particles loaded onto the cavity through the side guide cavity 140. The nano-magnetic core disperses the magnetic particles along with the material flow (i.e., it cooperates with the aforementioned rotating permanent magnet assembly 600). Then, the rotating permanent magnet assembly 600 outside the grinding magnetic cavity 500 is activated, and multiple sets of permanent magnets 604 rotate to generate a rotating magnetic field. This magnetic field drives the magnetic particles (loaded with selenium-rich particles) within the cavity to diffuse directionally in the material, ensuring uniform mixing of the selenium-rich particles and konjac powder. After mixing, the blades of the electric iris valve 180 gradually open, and the material enters the frequency-modulated vibrating screen 220 under gravity. Next, the frequency-modulated vibrating screen 220 is activated, using vibration to screen out large impurities from the material (impurities are discharged from the side). Qualified material (containing uniformly mixed selenium-rich particles) falls into the conical flow guide cylinder 700. At this time, the on / off valve 230 closes, and the material briefly remains in the conical flow guide cylinder 700, causing the magnetic bead trap 800 to be energized and generate a magnetic field, adsorbing residual magnetic particles (those not bound to the selenium-rich particles) in the material. After the nano-magnetic core is captured, the on / off valve 230 is opened, and the material enters the spiral mill assembly 900 for fine grinding. The captured magnetic particles are returned to the magnetic particle injector 130 through the circulation guide pipe 190.

[0042] In some embodiments, according to Figure 1 , Figure 4 and Figure 5 As shown, a drive structure assembly 300 is installed on the side end of the spiral component 902, and a drive mounting frame 100 is installed on the side end of the drive structure assembly 300. The drive mounting frame 100 is used to install the drive variable frequency motor. The drive structure assembly 300 includes a synchronous pulley 301. The bottom synchronous pulley center end of the synchronous pulley 301 is connected to the spiral component 902, and the top synchronous pulley center end of the synchronous pulley 301 is connected to a synchronous rod 302. A frame bearing rod 308 is sleeved on the outside of the synchronous rod 302.

[0043] A bevel gear structure 307 is installed on the side end of the synchronizing rod 302. An electromagnetic stopper is installed at the connection end of the synchronizing rod 302 and the bevel gear structure 307. The bevel gear structure 307 consists of two bevel gears. One set of bevel gears is connected to the drive rod. The side end of the other set of bevel gears passes through the frame support rod 308 through the keying rod and is connected to the drive pinion 311. A shock-absorbing plate 309 is installed on the side end of the drive pinion 311. There are two drive pinions 311. The top ends of the two drive pinions 311 are meshed with drive gears 310. A crushing component 306 is connected to the side end of the drive gear 310. A crushing ball 304 is connected to the bottom of the drive rod. A secondary grinding disc 170 is sleeved on the outside of the crushing ball 304. A primary grinding disc 305 is installed on the top side of the drive rod. The primary grinding disc 305 and the semi-circular grinding cavity 150 form a primary grinding layer structure. The secondary grinding disc 170 and the support grinding disc 160 form a secondary grinding layer structure.

[0044] A magnetic particle injector 130 is installed on the outside of one side of the frame support rod 308. The bottom of the magnetic particle injector 130 is connected to the side guide cavity 140. There is a gap between the primary grinding disc 305 and the grinding magnetic cavity 500. The side guide cavity 140 is located in the gap and is used to inject magnetic particles into the grinding magnetic cavity 500.

[0045] The top of the magnetic particle injector 130 is connected to a circulation guide tube 190, and the side end of the circulation guide tube 190 is connected to a magnetic bead trap 800.

[0046] A discharge end 210 is installed at the bottom of the side of the cavity 901. An external quick-release vibrating screen structure is installed at the bottom of the discharge end 210 for screening during discharge.

[0047] According to this embodiment, specifically: First, the drive frequency conversion motor on the drive mounting frame 100 starts, and the power is transmitted to the synchronous pulley 301 via the belt. The bottom synchronous pulley directly drives the spiral component 902 to rotate (providing conveying and grinding power for the spiral grinding assembly 900). The top synchronous pulley transmits the power to the bevel gear structure 307 via the synchronous rod 302. At this time, the electromagnetic interruptor is de-energized (clutch plate engages), and the power is split into two paths via the bevel gear. One path drives the horizontal keying rod to rotate, and the other path drives the vertical drive rod to rotate, so that the horizontal keying rod drives the drive pinion 311 to rotate. Through meshing with the drive gear 310, the agitator 306 is driven to move within the feed agitator chamber 400. The high-speed rotation crushes the input powder lumps. Simultaneously, the vertical drive rod drives the top primary grinding disc 305 to rotate, cooperating with the semi-circular grinding chamber 150 to perform primary grinding (extrusion and refinement) on the crushed particles. Afterward, the vertical drive rod continues to transmit power to the bottom crushing ball 304 and the secondary grinding disc 170. When the crushing ball 304 rotates, it crushes the material falling into the grinding magnetic chamber 500. The secondary grinding disc 170 cooperates with the bearing grinding disc 160 to complete the secondary fine grinding. During this process, the magnetic particle injector 130 is activated, injecting magnetic particles loaded with selenium-rich particles into the grinding magnetic chamber 500 through the side guide chamber 140, which are evenly dispersed as the material is ground.

[0048] Next, after the material completes secondary grinding and magnetic mixing in the grinding magnetic chamber 500, it enters the conical flow guide cylinder 700 through the electric iris valve 180 and the frequency-modulated vibrating screen 220. The opening and closing valve 230 is closed, and the magnetic bead catcher 800 is energized to adsorb residual magnetic particles. The captured particles flow back to the magnetic particle injector 130 through the circulation guide pipe 190 and are reinjected into the grinding magnetic chamber 500 for recycling. Meanwhile, the material enters the spiral grinding assembly 900. Subsequently, the spiral component 902 rotates under the drive of the synchronous belt pulley 301, driving the material forward in the chamber 901. With the help of the spacing adjustment component 903, fine grinding is completed. The ground material enters the external quick-release vibrating screen through the discharge end 210. The vibration screening removes trace impurities, and the finished product falls into the collection tank. The impurities are discharged from the discharge port.

[0049] The entire process involves synchronous driving of multiple stages, including crushing, two-stage grinding, and spiral conveying, through a single motor and transmission structure. This avoids the energy waste of multiple motors operating independently and achieves high transmission efficiency, enabling continuous and efficient production of selenium-enriched konjac milk tea powder blocks.

[0050] The wiring diagrams of the temperature sensor, magnetic bead trap 800, miniature electromagnetic rod 904, and magnetic particle injector 130 in this invention are common knowledge in the field, and their working principles are known technologies. The appropriate model is selected according to actual use. Therefore, the control methods and wiring arrangements of the temperature sensor, magnetic bead trap 800, miniature electromagnetic rod 904, and magnetic particle injector 130 will not be explained in detail.

[0051] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A grinding device for selenium-enriched konjac milk tea powder blocks, characterized in that: It includes a grinding magnetic cavity (500), a rotating permanent magnet assembly (600), and a spiral grinding assembly (900). The rotating permanent magnet assembly (600) is installed outside the grinding magnetic cavity (500), and has multiple sets of permanent magnets (604). The multiple sets of permanent magnets (604) rotate in phase outside the grinding magnetic cavity (500) and do not contact each other. The spiral grinding assembly (900) is installed at the bottom of the grinding magnetic cavity (500), and a conical flow guide cylinder (700) is connected between it and the grinding magnetic cavity (500). Magnetic bead catchers (800) are symmetrically installed on both sides of the conical flow guide cylinder (700) for catching magnetic particles injected into the grinding magnetic cavity (500). The spiral grinding assembly (900) includes a cavity (901), a spiral component (902) is installed inside the cavity (901), plasma nozzles (120) are symmetrically plugged into the outer sides of the top of the cavity (901), ultrasonic transducers are staggered inside the cavity (901), a temperature sensor is embedded in the surface of the cavity (901), and sliding sealing frames are symmetrically installed on both sides of the cavity (901). A spacing adjustment component (903) is slidably connected inside the sliding sealing frame, and a miniature electromagnetic guide rod (904) is installed on the side end of the spacing adjustment component (903).

2. The grinding equipment for selenium-enriched konjac milk tea powder blocks according to claim 1, characterized in that: The top of the grinding magnetic cavity (500) is connected to the feeding and crushing cavity (400), and the bottom of the feeding and crushing cavity (400) is connected to the semi-circular grinding cavity (150). The grinding magnetic cavity (500) is equipped with a bearing grinding disc (160). The bottom of the grinding magnetic cavity (500) is equipped with an electric iris valve (180). The bottom of the electric iris valve (180) is equipped with a frequency-modulated vibrating screen (220). The bottom of the conical flow guide cylinder (700) is equipped with an opening and closing valve (230), which is used to intercept materials carrying magnetic particles, so that the magnetic bead catcher (800) can catch the magnetic particles and then open the valve.

3. The grinding equipment for selenium-enriched konjac milk tea powder blocks according to claim 2, characterized in that: An inert gas regulating component (200) is installed on the outside of the side end of the cavity (901). The inert gas regulating component (200) includes an inert gas chamber (201). The inert gas chamber (201) is sleeved on the outside of the side end of the cavity (901). A gas riser pipe (202) is connected to the top of the inert gas chamber (201). A gas conveying structure (203) is connected to the top of the gas riser pipe (202). A closed return pipe (204) is connected to the side end of the gas conveying structure (203). A gas conveying pipe is connected to the side end of the gas conveying structure (203). The gas conveying pipe is connected to the cavity (901).

4. The grinding equipment for selenium-enriched konjac milk tea powder blocks according to claim 3, characterized in that: The side end of the spiral component (902) is provided with a drive structure assembly (300), and the side end of the drive structure assembly (300) is provided with a drive mounting frame (100). The drive mounting frame (100) is used to install the drive variable frequency motor. The drive structure assembly (300) includes a synchronous pulley (301). The bottom synchronous pulley center end of the synchronous pulley (301) is connected to the spiral component (902). The top synchronous pulley center end of the synchronous pulley (301) is connected to a synchronous rod (302). The synchronous rod (302) is fitted with a frame support rod (308).

5. The grinding equipment for selenium-enriched konjac milk tea powder blocks according to claim 4, characterized in that: A bevel gear structure (307) is installed on the side end of the synchronizing rod (302). An electromagnetic stopper is installed at the connection end of the synchronizing rod (302) and the bevel gear structure (307). The bevel gear structure (307) consists of two bevel gears. One set of bevel gears is connected to a drive rod, and the side end of the other set of bevel gears passes through the frame support rod (308) via a keying rod and is connected to a drive pinion (311). A shock-absorbing plate (309) is installed on the side end of the drive pinion (311). There are two drive pinions (311). The top of each pinion (311) is meshed with a drive gear (310). The side end of the drive gear (310) is connected to a crushing component (306). The bottom of the drive rod is connected to a crushing ball (304). The crushing ball (304) is fitted with a secondary grinding disc (170). The top side of the drive rod is fitted with a primary grinding disc (305). The primary grinding disc (305) and the semi-circular grinding cavity (150) form a primary grinding layer structure. The secondary grinding disc (170) and the bearing grinding disc (160) form a secondary grinding layer structure.

6. The grinding equipment for selenium-enriched konjac milk tea powder blocks according to claim 1, characterized in that: The rotating permanent magnet assembly (600) further includes a connecting frame (601), the bottom of which is provided with an annular groove (602), and an annular guide rail (603) is provided inside the annular groove (602). Multiple sets of permanent magnets (604) are connected to positioning slides on the annular guide rail (603).

7. The grinding equipment for selenium-enriched konjac milk tea powder blocks according to claim 5, characterized in that: A magnetic particle injector (130) is installed on the outside of one side of the frame support rod (308). The bottom of the magnetic particle injector (130) is connected to a side delivery cavity (140). There is a gap between the primary grinding disc (305) and the grinding magnetic cavity (500). The side delivery cavity (140) is located in the gap and is used to inject magnetic particles into the grinding magnetic cavity (500).

8. The grinding equipment for selenium-enriched konjac milk tea powder blocks according to claim 7, characterized in that: The top of the magnetic particle injector (130) is connected to a circulation guide tube (190), and the side end of the circulation guide tube (190) is connected to a magnetic bead catcher (800).

9. The grinding equipment for selenium-enriched konjac milk tea powder blocks according to claim 5, characterized in that: The bottom of the side of the cavity (901) is provided with a discharge end (210), and the bottom of the discharge end (210) is provided with an external quick-release vibrating screen structure for screening during discharge.

10. A method for grinding selenium-enriched konjac milk tea powder blocks, characterized in that, The grinding equipment for selenium-enriched konjac milk tea powder blocks as described in claim 9 includes the following steps: S1. First, the selenium-enriched konjac milk tea powder blocks are initially crushed by the crushing part (306) of the feeding crushing chamber (400), and then pass through the first-stage grinding disc (305) and the semi-circular grinding chamber (150), and the second-stage grinding disc (170) and the bearing grinding disc (160) to complete two-stage grinding. At the same time, the nano-magnetic core loaded with selenium-enriched particles is injected into the grinding magnetic chamber (500) through the magnetic particle injector (130). S2. Next, the permanent magnet (604) of the rotating permanent magnet assembly (600) rotates to generate a rotating magnetic field, which drives the magnetic particles to diffuse in the material in a directional manner. After the mixed material is screened by the electric iris valve (180) and the frequency-modulated vibrating screen (220), when it passes through the conical flow guide cylinder (700), the opening and closing valve (230) closes, the magnetic bead catcher (800) captures the residual magnetic particles, and then the opening and closing valve opens, and the material enters the spiral grinding assembly (900). S3. Next, the spiral component (902) rotates to convey the material, the inert gas regulating component (200) introduces argon gas, the plasma nozzle (120) ionizes to generate low-temperature plasma, the ultrasonic transducer (20-40kHz) works with the spiral shear force to break up the agglomerates, and the micro electromagnetic guide rod (904) drives the spacing adjusting component (903) to dynamically adjust the grinding spacing (0.5-2mm) to complete the fine grinding. S4. After that, the material is discharged through the discharge end (210) and screened by an external vibrating screen to obtain the finished product; after each batch, liquid is injected into the whole. The residual powder is removed by sublimation cold explosion, and the cleaned cavity is dried by inert gas in preparation for the next batch of operations.

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