271 results about "Magnetic stirrer" patented technology

The invention relates to the technical field of electrolyte, in particular to a thioether cross-linked solid polymer electrolyte membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: taking N, N-dimethylformamide, respectively adding 3, 6-dioxa-1, 8-octane dithiol and triglycidyl isocyanurate, and uniformly stirring to obtain a mixed solution; adding bis (trifluoromethylsulfonyl) imide lithium into the mixed solution, putting magnetons on a magnetic stirrer, and completely dissolving the magnetons to obtain a precursor solution; and pouring a proper amount of the precursor solution into a polytetrafluoroethylene mold, spreading, and carrying out cross-linking polymerization in a blast oven to form the film. The three-dimensional thioether cross-linked network structure has a large number of weakly coordinated thioether groups, dissociation of lithium salt can be promoted, a large number of free Li < + > is generated, the number of Li < + > is increased, meanwhile, the crystallinity of a polymer is remarkably reduced, the ionic conductivity is improved, the mechanical stability of a film can be improved, and the service life of a battery is effectively prolonged.

The utility model discloses a magnetic stirrer with an efficient stirring function, which comprises a stirring barrel, a liquid inlet valve fixedly connected to one end of the upper part of the stirring barrel, a liquid discharge valve fixedly connected to one end of the lower part of the stirring barrel, a supporting column fixedly connected to the other end of the lower part of the stirring barrel, and a bottom plate fixedly connected to the lower part of the supporting column, a magnetic transmission mechanism is fixedly connected to the middle position above the stirring barrel, a rotating rod is movably inserted into the inner side of the stirring barrel, a stirring mechanism is fixedly clamped to the surface of the rotating rod, and a fixing mechanism is fixedly arranged at the other end above the bottom plate; the radial extension range of the stirring blades can be dynamically adjusted through linkage extension of the hydraulic telescopic rod and the folding rod in the stirring mechanism, and the attack angle and the coverage area of the stirring blades in fluids with different viscosities can be automatically adjusted in combination with real-time feedback control of the adjusting sensor on the pitch angle of the stirring blades, so that the mixing efficiency is remarkably improved.

The invention relates to the technical field of motor control, and discloses a torque adjustment control method of a magnetic stirrer based on sample characteristics, which comprises the following steps: acquiring an armature three-phase current and a rotor position signal, and converting the armature three-phase current and the rotor position signal into a quadrature-axis actually measured current and a direct-axis actually measured current by utilizing coordinate transformation logic; extracting a magnetic declination estimated value reflecting the phase lag degree of the stirrer based on an electromagnetic coupling model; calculating a magnetic declination change rate according to the magnetic declination estimated value of the continuous sampling period; a transient compensation current is generated by adopting a nonlinear compensation operator and combining a real-time synchronous torque coefficient; according to the invention, the transient characteristics of the magnetic declination are utilized to realize the real-time sensing of the load disturbance, the magnetic coupling slippage caused by the sudden change of the characteristics of the sample is effectively inhibited, and the stability of the magnetic declination is improved. And the ineffective temperature rise of the motor is reduced while the system stability is guaranteed.

The utility model discloses a small-scale test device for research on anaerobic fermentation of granular sludge. The small-scale test device comprises a fermentation bottle, a granular sludge feeding component, a granular sludge sampling component, an exhaust component and a stirring and mixing device, the granular sludge feeding and sampling component comprises a sample feeding pipe and a sampling pipe which penetrate through the sealing rubber plug of the fermentation bottle, the sample feeding pipe and the sampling pipe enter the fermentation liquid in the fermentation bottle, the feeding pipe is provided with a manual ball valve, and the sampling pipe is provided with a manual ball valve and a check valve. The exhaust component comprises an exhaust pipe, a manual ball valve and an air collecting bag, the exhaust port is connected with the air collecting bag, and a closed environment is kept. The stirring device comprises a stirring rotor and a magnetic stirrer which are arranged in the fermentation bottle, and fermentation liquor is kept uniform in the sampling process. According to the small-scale test device for the granular sludge anaerobic fermentation research, the difficulty in a granular sludge fermentation test can be solved, the device is simple to assemble, the sampling is uniform and sufficient, and the anaerobic environment is stable.

The invention discloses a preparation method for improving the deacetylation degree of chitosan, which comprises the following steps: step S1, crushing crab shells, cleaning the processed eriocheir sinensis shells, drying at 65 DEG C, grinding the dried crab shells, and sieving with a 100-mesh sieve to prepare crab shell powder; s2, plasma pretreatment: mixing the crab shell powder with distilled water according to the ratio of 1: 20 (w / v), performing pretreatment by adopting atmospheric pressure plasma jet, putting a beaker loaded with a crab shell powder solution into a 180 rpm magnetic stirrer, treating for 60 minutes under the conditions that the power is 750 W and the gas flow is 1.2 L / min, washing to be neutral, and drying at 65 DEG C to obtain the plasma pretreated crab shell powder, the deacetylation degree of chitosan is increased by 4-7% through plasma pretreatment, the product purity is equivalent to that of commercial chitosan, and the production cost is saved; the performance of the chitosan extracted by the method is superior to that of chitosan extracted by a traditional chemical extraction method.

The utility model relates to the technical field of laboratory instruments, in particular to a magnetic stirrer for a laboratory, which is characterized in that a clamping structure for fixing a container is arranged on a magnetic stirrer body; the clamping structure comprises a supporting ring arranged above the placement surface of the magnetic stirrer body and clamping plates arranged in the circumferential direction of the supporting ring, and each clamping plate is provided with a clamping surface and is used for fixing a container through the clamping surfaces of at least three clamping plates; the clamping structure further comprises a first elastic element used for driving the clamping faces of the clamping plates to be close to the axis of the supporting ring. By means of the innovative clamping structure design, the technical problem of fixing of an existing magnetic stirrer container is effectively solved, the magnetic stirrer container fixing device has the advantages of being reasonable in structure, convenient and fast to operate, high in applicability and the like, and experiment safety and reliability are remarkably improved.

The application discloses a preparation method of a low-TCR low-cost ceramic heating tube, and comprises the following steps: (1) preparing an organic carrier: 60 parts by weight of terpineol, 20 parts by weight of ethyl cellulose, 10 parts by weight of a binder and 10 parts by weight of diethylene glycol acetate are placed into a magnetic stirrer and uniformly dissolved and mixed; (2) weighing metal powder: Mo: 50-70 parts by weight; Re: 20-30 parts by weight; Mn: 0-5 parts by weight; Cr: 10-15 parts by weight; by adopting Mo, Re, Mn and Cr in a specific ratio as the metal powder, the traditional mode of adopting metal ruthenium powder or a mixture of metal ruthenium powder and other common metal powder is replaced, the prices of Mo, Re, Mn and Cr are low, so that the preparation cost of the ceramic heating tube is effectively reduced, the purpose of low TCR is achieved, and the scale production is facilitated; meanwhile, the ceramic heating tube prepared by adopting the application has higher overall bending strength, and can better meet the use requirement.

A system for plant-mediated synthesis and characterization of vanadium pentoxide (V2O5) nanoparticles, comprising a structurally integrated device configured to perform extraction, reaction, calcination and performance evaluation within a closed automated control loop, wherein the system includes: a basic chassis made of heat-insulated stainless steel, which houses a microcontroller-based central control unit; a bioextract preparation unit fluidically connected to a reactive mixing chamber, the bioextract preparation unit comprising a Soxhlet extractor with a borosilicate condenser, a thermostatically controlled heating jacket and a digital thermocouple to maintain extraction temperatures between 60°C and 70°C; a precursor feed vessel containing an ammonium metavanadate solution with a molarity between 0.1 M and 0.3 M, wherein this vessel is connected to the reaction mixing chamber via an electromagnetically actuated inlet valve and a precision peristaltic pump; a reaction mixing chamber with an inductive heating coil, a magnetic stirrer plate and a temperature and pH monitoring device configured to maintain a uniform reaction temperature of 70±2°C during the precursor-extract interaction; a calcination module consisting of a muffle furnace lined with refractory ceramic material and containing embedded nichrome heating elements controlled by a PID-controlled temperature controller to achieve a heating rate between 5 °C and 10 °C per minute up to a setpoint of 445±5 °C for combustion synthesis; an optical characterization module with integrated UV-VIS spectrometer, Fourier transform infrared analyzer and photoluminescence detector, each optically isolated and electronically connected to the control unit; and a photocatalytic and antibacterial test chamber fluidically connected to the output of the calcination module, the chamber comprising a UV irradiation array, an optical absorption sensor and a temperature-controlled bacterial incubation plate, the central control unit includes a programmable logic controller (PLC) configured to synchronize the operation of all submodules via feedback control loops, which receive data from temperature, pH and optical sensors, thereby automating the synthesis, analysis and testing of V2O5 nanoparticles.

The application belongs to the field of SOD preparation, and discloses a preparation method and device of SOD resistant to pepsin degradation, which comprises the following steps: S1 powder preparation: dissolving SOD fermentation pure liquid in a buffer solution with pH of 5.2-7.8, adding protective agent and tea yellow in sequence, stirring, filtering, and placing in a freeze dryer to prepare freeze-dried powder; S2 drying; S3 tabletting; S4, coating liquid preparation: dissolving wheat gliadin and soybean protein in a mixed solution prepared from water and ethanol with a volume ratio of 1:1, wherein the mass ratio of the wheat gliadin and the soybean protein is 0.5-1:1, adding glycerol, stirring for 20 min by using a magnetic stirrer, and ultrasonicating for 40 s; S5, coating: placing the tablets in a coating machine, setting air inlet volume, air inlet temperature, pan rotating speed, atomization rate, fan face pressure, and mortar flow, until the coating weight increases to 3%-10% in mass fraction and the coating thickness is 20-50 μm, and then drying and cooling. The prepared SOD is not easy to be photolyzed and can resist gastric acid degradation to ensure the complete activity of the SOD.

The utility model belongs to the technical field of stirrers, and particularly relates to a heating magnetic stirrer with a telescopic structure, which comprises a heating seat, an auxiliary plate is fixedly connected to the side wall of the heating seat, a telescopic column is fixedly connected to the upper part of the auxiliary plate, the telescopic column is in threaded connection with a bolt, a clamping sleeve is sleeved on the telescopic column, and the clamping sleeve is in threaded connection with the bolt. A clamping sleeve is arranged on the telescopic column, the clamping sleeve is connected with a temperature measuring rod in a sleeving mode, a fixing plate is fixedly connected to the upper portion of the telescopic column, a second motor is fixedly connected to the upper portion of the fixing plate, an auxiliary mechanism is arranged on the fixing plate, the auxiliary mechanism comprises a sleeve, and the sleeve is fixedly connected with the output end of the second motor. According to the heating magnetic stirrer with the telescopic structure, the bidirectional screw rod is driven to rotate by starting the motor I, the two groups of clamping plates are driven to clamp the stirring cup under the cooperation of the positioning rod, and the motor I is turned off after the stirring cup is clamped, so that the operation is simple and convenient, and the stability of the stirring cup is ensured.

The application discloses a vacuum degassing method and device, comprising: vacuumizing the degassing chamber by a vacuum pump; making the liquid to be degassed flow into the degassing chamber and detecting the viscosity of the liquid to be degassed; setting the rotating speed of the magnetic stirrer and the frequency of the ultrasonic generator according to the viscosity, controlling the magnetic stirrer and the ultrasonic generator to carry out collaborative degassing, the magnetic stirrer is installed in the degassing chamber and cooperates with the magnetic stirrer outside the degassing chamber, the ultrasonic generator is installed outside the degassing chamber, when the magnetic stirrer rotates, the liquid to be degassed uniformly passes through the ultrasonic wave generated by the ultrasonic generator; when the preset air extraction condition is met, the magnetic stirrer and the ultrasonic generator are closed, after being rested for a preset time, the degassing chamber is vacuumized, and then the magnetic stirrer and the ultrasonic generator are controlled to carry out collaborative degassing until the preset completion condition is reached, and the liquid after degassing is obtained. Different viscosity liquids can be efficiently vacuum degassed.

The invention relates to the fields of environmental protection, fire protection and new materials, in particular to a nano-silver self-assembled efficient disinfectant synthesized by a water extract of epimedium stems. The method comprises the following steps: weighing 10 g of epimedium stem powder, putting the epimedium stem powder into a beaker, then adding 100 mL of purified water into the beaker, putting the beaker on an electrothermal furnace, heating until boiling, then heating for 30 min, after a solid-liquid mixture is cooled, filtering impurities by using gauze, centrifuging for 10 min at a speed of 4000 r / min, retaining supernate, and fixing the volume to 100 mL; 0.17 g of silver nitrate powder is weighed and added into a beaker, then 100 mL of purified water is added for dissolution, and a silver nitrate solution is prepared; adding 20mL of the water extracting solution of the epimedium stems after constant volume into the beaker; mixing the solution, and stirring for 2 hours by using a magnetic stirrer; and the temperature is 60 DEG C to obtain the herba epimedii water extract-nano-silver self-assembled solution.

The application relates to the technical field of explosion suppression agent preparation, in particular to a novel inorganic low-silicon-aluminum-ratio explosion suppression material and a preparation method thereof.The steps of the preparation method comprise the following steps: placing dried molecular sieves in an alkali solution, placing the molecular sieves in a magnetic stirrer and stirring intensively, centrifugally separating the stirred sample, washing the sample with deionized water until neutral, drying the sample in a blast drying oven at 120 DEG C for 24 h, grinding the sample in a mortar for 10 min, and sieving to obtain explosion suppression powder.The prepared inorganic low-silicon-aluminum-ratio explosion suppression material has the advantages of high efficiency, low cost, non-toxicity and harmlessness, and can be used for industrial production and applied to the field of methane explosion suppression.

The invention relates to an Au / Ag / g-C3N4 composite material and a preparation method thereof.The preparation method comprises the steps that urea, silver nitrate and HAuCl4 are added into a clean beaker and tightly wrapped with tinfoil, deionized water is added for dissolution, and then magnetons are added and stirred on a magnetic stirrer in a dark place till the magnetons are completely dissolved; drying the mixture solution in a drying oven, grinding the mixture solution into powder by using an agate bowl after the mixture solution is completely dried, and putting the powder into a corundum porcelain boat; the preparation method comprises the following steps: performing thermal polymerization treatment on a mixed grinding material of urea, silver nitrate and HAuCl4, heating a tubular furnace to 540 DEG C under the protection condition of argon flow, keeping the constant temperature for 1-3 hours, and finally cooling the tubular furnace to room temperature in an argon atmosphere environment to obtain the Au / Ag / g-C3N4 composite material. Au and Ag are introduced to weaken hydrogen bonds in carbon nitride, so that the technical problem that future application of existing g-C3N4 is limited by specific surface area, insufficient visible light absorption and carrier recombination is solved.

The application discloses a kind of fully closed sodium alginate capsule forming device, including fixed body, fixed body is connected with positioning body by screwing or welding mode on it, the front end surface of the fixed body is connected with forming cavity by screwing or welding mode, the bottom of the forming cavity is fixedly connected with processing cavity, the forming cavity is communicated with processing cavity, the bottom of the processing cavity is fixedly provided with magnetic stirrer;High-voltage direct-current generator is fixedly provided on the forming cavity, the fixed cavity is connected with the inner wall of the forming cavity by screwing or welding mode, the fixed cavity is provided with communication pipe, and the communication pipe is communicated with the liquid guide device;Flow guide plate is fixedly provided in the processing cavity, the flow guide plate is connected with the inner wall of the processing cavity by sliding mode, and positioning plate is fixedly provided below the two sides of the flow guide plate, hydraulic lifting cylinder is fixedly provided between the positioning plate and the flow guide plate, and flow guide hole is formed in the flow guide plate.

The utility model discloses a magnetic stirrer with an adjustable stirring range, and relates to the technical field of magnetic stirrers. The stirrer comprises a stirrer main body, a fixing seat is arranged at the upper end of the stirrer main body, locking blocks are movably installed on the two sides of the inner wall of the fixing seat, a clamping structure is arranged on one side of each locking block, a supporting seat is arranged at the upper end of the stirrer main body, and an adjusting screw rod is movably inserted into the upper end of the supporting seat in a penetrating mode. An adjusting plate is installed at the lower end of the adjusting screw rod, a fixing rod is fixedly installed in the middle of the lower end of the adjusting plate, a rotating block drives a fluted disc to rotate the fluted disc, the fluted disc can drive a plurality of meshing gears to rotate, the meshing gears drive a plurality of rotating screw rods to rotate, and a movable screw sleeve rotates under the action of threads. And the movable screw sleeve drives the movable rod to move along with the rotation of the rotating screw rod, so that the distance between the movable rod and the fixed rod can be adjusted, and the stirring range can be conveniently adjusted.

The utility model relates to the technical field of detection devices, and provides a high-efficiency carbon adsorption microcapsule detection device which comprises a magnetic stirrer and a supporting rod fixedly connected to the top of the magnetic stirrer. According to the utility model, the locking bolt is rotated by hand to release the abutting state between the locking bolt and the supporting rod, so that the movable ring can slide downwards along the outer surface of the supporting rod, and the connecting rod, the connecting plate, the L-shaped bracket, the leak hole placing barrel and the like are synchronously driven to move downwards, so that the leak hole placing barrel is immersed into an adsorbate solution of a container; the locking bolt is rotated by hand to abut against the supporting rod to limit the movable ring, so that the situation that the microcapsules float on the surface of the adsorbate solution due to different densities, sizes and shapes can be prevented, and the microcapsules are in full contact with the adsorbate solution; further, the accuracy of the adsorption result of the adsorbate solution on the microcapsule carbon is improved.

The utility model discloses a magnetic stirring device which comprises a magnetic stirrer main body and a magnetic tray, the magnetic tray is arranged at the top of the magnetic stirrer, a container is arranged on the magnetic tray, an annular jacket is sleeved outside the container, and a magnetic stirrer is arranged in the container. According to the magnetic stirring device provided by the utility model, the container is heated through the annular jacket, and the bottom of the container is directly contacted with the magnetic tray, so that the stirring force of the magnetic stirrer is ensured, and the magnetic stirring device is suitable for stirring and mixing a solution with higher viscosity.

The utility model provides a carbon black iodine absorption value measuring device which comprises a rotating wheel disc, a magnetic stirrer, a transmission filtering device and a reaction tank, a plurality of sample cups can be placed on the rotating wheel disc, after a mixed liquid sample is stirred by the magnetic stirrer, an iodine solution and a sodium thiosulfate solution are extracted by a plunger pump, and the iodine absorption value of the carbon black is measured. In the extraction process, carbon black in the iodine solution is filtered through the filter pipe, filtrate is added into the reaction tank and chemically reacts with the sodium thiosulfate, and the iodine ion electrode in the reaction tank can judge the end point of the reaction by detecting the electron exchange capacity of the iodine solution and the sodium thiosulfate in the reaction tank when the iodine solution and the sodium thiosulfate are subjected to oxidation-reduction reaction. And meanwhile, the measured current data is transmitted to a microcomputer for automatic processing, so that accurate carbon black iodine absorption value data is obtained. The problems that manual operation is low in efficiency and the precision is greatly influenced by human factors are solved, and the advantages of high efficiency and high precision are achieved.

The invention discloses a device and method capable of dynamically monitoring heavy metal polluted water and soil repaired through an EICP technology, the device comprises a support, three monitoring systems and a grouting system, the first monitoring system comprises a measuring box, a top cover, a motor, a grouting hole, a transmission shaft, a gear, an inner gear ring, a stirring sampling pipe, a supporting rod, a sheet type multifunctional sensor and a sampling opening; the second monitoring system comprises a liquid conveying hose, a flow control valve, a peristaltic pump, a pump pipe, a measuring box, a raw material box, a waste liquid box, a conductivity meter and a magnetic stirrer; the third monitoring system comprises a support frame, a transfusion hose, a flow control valve, a peristaltic pump, a pump pipe, a centrifugal filter, a measuring box, a raw material box, a waste liquid box and an atomic absorption spectrophotometer; the grouting system comprises a urease solution barrel, a urea solution barrel, a three-way pipe and a suction pump. Biological, chemical and physical indexes in the repairing process can be monitored in real time, and the repairing process can be known.

The invention discloses a method and a device for measuring iodine content of a feed sample, and relates to the field of feed microelement detection.The device comprises a sample manufacturing unit and a sample measuring unit, the sample manufacturing unit comprises a crushing and screening all-in-one machine and a magnetic stirrer, and a screening plate is arranged in the crushing and screening all-in-one machine; the crushing and screening all-in-one machine is divided into a crushing chamber and a storage chamber from top to bottom through the screening plate, a feeding port communicated with the crushing chamber is formed in the top of the crushing and screening all-in-one machine, a first-stage shear type mechanism is arranged below the feeding port and used for simulating the shearing action of scissors, and a second-stage crushing mechanism is arranged in the crushing chamber and used for simulating the shearing action of the scissors. A fiber snapping mechanism is arranged between the secondary crushing mechanism and the screening plate, the fiber snapping mechanism is used for snapping fiber tissues of the feed, and the sample determination unit comprises a plasma mass spectrometer, so that the problem of incomplete crushing caused by fiber winding is avoided, the uniformity of feed samples is ensured, and detection errors caused by non-uniformity of the samples are reduced from the source.

The invention discloses a photo-thermal catalytic reaction kettle and system for continuous collection and online monitoring. The reaction system comprises a continuous collection device, a reaction kettle, a photo-thermal collaboration module and a monitoring system. The continuous collection device is fixed on the kettle cover, communicated into the kettle and externally connected with a vacuum pump. The reaction kettle consists of a kettle cover, a kettle body and a magnetic stirrer base, and is convenient to assemble and maintain. The photo-thermal cooperative module is composed of a heat preservation layer, a temperature control table, an annular light source, a top light source and an illumination control table, photo-thermal cooperative control can be achieved, and the catalytic efficiency is improved. And the monitoring system can collect the temperature and pressure in the reaction kettle to realize real-time monitoring of reaction parameters. The method can be widely applied to the fields of photothermal catalytic synthesis of chemicals, energy conversion and environment-friendly purification, and the development of the photothermal catalytic technology is promoted.

1. Name of the designed product: magnetic stirrer. 2. Use of the designed product: laboratory instrument for stirring various samples. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view 1.

The application relates to the technical field of motor control, and discloses a stepless rotation speed precision control method of a magnetic stirrer, which comprises the following steps: a power conversion unit outputs a three-phase current signal according to a rotation speed instruction, and a rotating driving magnetic field is established in an electromagnetic energy conversion unit; a high-frequency orthogonal phase perturbation signal is superimposed in the phase angle of a voltage vector, so that the power angle of the rotating driving magnetic field is induced to produce phase offset fluctuation; a stator current response component is extracted, and a synchronous torque limit value is identified, then a control gain is corrected, and a torque feedforward compensation amount is superimposed; the application realizes online perception of the depth of magnetic coupling by analyzing electromagnetic characteristics, utilizes a dynamic compensation mechanism to offset fluid resistance impact in real time, eliminates the risk of slippage of a stirring sub under a high-viscosity reaction working condition, and improves the synchronous robustness and rotation speed control precision of system operation.

The invention relates to the technical field of ink supply of jet printing machines, and discloses an ink supply device of a jet printing machine, which comprises a tank body, a shell, a movable stirring assembly and an ink conveying pipe, and a filter cartridge is concentrically arranged in the tank body; the shell is used for sealing the top of the tank body; the movable stirring assembly comprises a driving part, a support, a stirring cylinder, a stirrer and a magnetic stirrer, the driving part is arranged on the shell, the driving end of the driving part is connected with the support to drive the support to move in the vertical direction, the support is connected with the stirring cylinder, the stirring cylinder and the filter cylinder are concentrically arranged, a plurality of filter holes are formed in the bottom of the stirring cylinder, and the stirrer is placed in the stirring cylinder; the magnetic stirrer is arranged on the bracket and is used for driving the stirrer to stir the ink in the filter cartridge; one end of the ink conveying pipe extends towards the stirring barrel, and the other end of the ink conveying pipe penetrates through the shell and is connected with jet printing machine equipment. Under the condition that it is guaranteed that ink in the tank body does not leak, precipitation of the ink is reduced, the uniformity of the ink is improved, and then the jet printing quality can be improved.

The utility model belongs to the technical field of microbubble flotation, and particularly relates to an ultrasonic magnetic stirring flotation device which comprises a flotation pipe used for containing minerals, and a base is arranged at the bottom end of the flotation pipe. The magnetic stirring assembly is arranged at the bottom of the flotation pipe, and the magnetic stirring assembly is used for stirring minerals during flotation; the ultrasonic cavitation assembly is arranged in the flotation pipe, and the ultrasonic cavitation assembly is used for carrying out oscillation crushing on the minerals; and the gas generation assembly is arranged at the bottom of the flotation pipe and used for generating bubbles during flotation. According to the utility model, the stirring speed is controlled by controlling the knob of the magnetic stirrer, so that gas penetrates through the ceramic to generate bubbles, ore pulp is promoted to be uniformly mixed through the oscillation action of ultrasonic waves, the micro-bubbles generated by the cavitation action promote the flotation of micro-minerals, and an important theoretical basis is provided for micro-bubble flotation.

The utility model provides an ultra-dry solvent preparation device which comprises a sealable raw material bottle, a magnetic stirrer and a sealable finished product collecting bottle, the raw material bottle is used for containing a solvent and a molecular sieve, the magnetic stirrer comprises a magnetic stirring table and a rotor, the raw material bottle is arranged on the magnetic stirring table, and the rotor is arranged on the magnetic stirring table. The rotor is arranged in the raw material bottle, the raw material bottle is connected with the finished product collecting bottle through a first pipeline, and a first conveying pump and a filter are arranged on the first pipeline. A solvent is dried through the molecular sieve and stirred through the magnetic stirring table, so that the drying speed is increased, the drying effect is enhanced, dust which is mixed in the solvent and falls off from the molecular sieve is removed through the filter, the solvent is pumped into the finished product collecting bottle through the first conveying pump, and the whole operation process is carried out in a sealed environment; introduction of moisture can be avoided, and the drying effect is improved.

The application relates to the technical field of motor control, and discloses a torque adjustment control method for a magnetic stirrer based on sample characteristics, which comprises the following steps: acquiring three-phase armature currents and a rotor position signal, converting the three-phase armature currents and the rotor position signal into measured cross-axis currents and measured direct-axis currents by using a coordinate transformation logic; extracting a magnetic deflection angle estimation value reflecting the phase lag degree of a stirrer based on an electromagnetic coupling model; calculating a magnetic deflection angle change rate according to the magnetic deflection angle estimation value in a continuous sampling period; generating a transient compensation current by using a nonlinear compensation operator and combining a real-time synchronous torque coefficient; and superimposing the transient compensation current on the cross-axis current instruction to generate a compensation torque by fine-tuning the rotating angular velocity of the armature magnetic field. The application realizes real-time sensing of load disturbance by using the transient characteristics of the magnetic deflection angle, effectively suppresses magnetic force coupling slip caused by sudden changes in sample characteristics, guarantees the stability of the system, and reduces the invalid temperature rise of the motor.