360results about How to "Avoid forming" patented technology

This invention relates to a method for the combined leaching of high-silicon zinc roasted ore and high-sulfur zinc oxide powder, belonging to the field of hydrometallurgical technology. The high-sulfur zinc oxide powder is leached neutrally to obtain zinc oxide leaching residue and zinc powder leaching solution. The zinc powder leaching solution is then mixed with high-silicon zinc roasted ore slurry for controlled silica leaching of the high-silicon zinc roasted ore to obtain zinc ore leaching residue and zinc ore leaching solution. The zinc powder leaching residue and zinc ore leaching residue are mixed and then subjected to low-acid leaching to obtain low-leaching residue and low-leaching solution. The low-leaching residue is then subjected to hot acid leaching to obtain hot-leaching residue and hot-leaching solution. The hot-acid residue is then subjected to high-acid leaching to obtain lead-silver slag product and high-leaching solution. The hot-leaching solution is neutralized and reduced by high-sulfur zinc oxide powder to obtain neutralized solution and neutralized residue. The neutralized solution is then subjected to mineralization and iron precipitation to obtain hematite product and iron-removed solution. This invention can effectively control the leaching of silicon in the high-silicon zinc roasted ore leaching process, and simultaneously realize the oxidative leaching of sulfides in zinc oxide powder and the reductive leaching of zinc ferrite in zinc roasted ore, thus simplifying the leaching process of zinc roasted ore and zinc oxide powder.

The invention belongs to the field of thin films, and particularly discloses an atomic layer deposition method and a thin film prepared through the atomic layer deposition method. According to the deposition method, the reaction cavity, the two input pipeline systems, the outlet valve and the vacuum pump in the atomic layer deposition system are used for controlling precursor pulse deposition and inert gas purging conditions in the atomic deposition process, and the film deposition state is improved; the efficiency of purging and removing substances and impurity residues such as a precursor and a reaction product thereof is improved, the problem that the quality of a deposited film is affected by the impurity residues in a reaction system or on the surface of a sample in the film deposition process is avoided, the uniformity and compactness of film deposition and the coverage rate and conformal rate of a film on the surface of a base material hole are improved, the defects of the film are reduced, and the yield is improved. And the method can be applied to a substrate with a high aspect ratio structure to deposit the film, so that the purpose of manufacturing a large-size complicated special-shaped structure device is achieved.

The invention provides a multi-feedback-channel fluid oscillator, and belongs to the technical field of fluid jetting devices. Comprising an oscillation cavity, an inlet, a nozzle and at least three feedback channels, the inlet is formed in one end of the oscillation cavity, the nozzle is formed in the other end of the oscillation cavity, the nozzle and the inlet are oppositely arranged along the central axis of the oscillation cavity, and the feedback channels are circumferentially distributed around the central axis of the oscillation cavity. And each feedback channel is provided with a feedback channel inlet and a feedback channel outlet. Through the configuration design of the multiple feedback channels, the fluid can form feedback control flow through the feedback channels, and the fluid entering the oscillation cavity through the inlet flows along the wall of the oscillation cavity in multiple directions and is switched through the coupling effect of the fluid coanda effect and multi-channel backflow feedback. And finally, multi-direction sweeping self-oscillation jet flow is formed at the nozzle, so that the space coverage range and the atomization efficiency of the jet flow are greatly improved.

The utility model discloses a kind of smoke gas deflection-preventing fused salt furnaces, including furnace body, inner ring coil pipe, middle ring coil pipe, outer ring coil pipe, top coil pipe, sealing cover, burner and flue, the furnace body includes shell component, furnace base and furnace top cover, the lower end portion of the shell component is connected with the furnace base, the furnace top cover is connected on the upper end portion of the shell component, the shell component, the furnace base and the furnace top cover are enclosed to form furnace cavity, the inner ring coil pipe, the middle ring coil pipe and the outer ring coil pipe are sequentially arranged in the furnace cavity from inside to outside, the top coil pipe is arranged in the furnace cavity and located above the inner ring coil pipe and the middle ring coil pipe, and the outer peripheral portion of the top coil pipe is connected with the upper end portion of the outer ring coil pipe.The utility model can avoid smoke gas deflection, can make smoke gas evenly flow distribution in furnace, and then can improve the heat exchange efficiency between smoke gas and fused salt, reduce heat loss, reduce energy consumption, can also prolong the service life of furnace tube.

The utility model discloses an antibacterial air filter, which relates to the technical field of air filters, and comprises a shell, a transmission mechanism is rotatably mounted in the shell, the end part of the transmission mechanism is connected with a chassis, the chassis is provided with a clamping groove I, and an impurity filtering layer is inserted in the clamping groove I; a second clamping groove is formed in the bottom of the shell, a sterilization filtering layer is clamped in the second clamping groove and arranged on the outer side of the impurity filtering layer in a sleeving mode, a top cover is arranged at the end of the shell, an air inlet is formed in the top cover, and an exhaust outlet is formed in the side wall of the shell. According to the utility model, through the rotation of the side wheel, the gear disc drives the impurity filtering layer to rotate, so that air entering the impurity filtering layer is in uniform contact with the impurity filtering layer, blockage or failure caused by overuse of a local area is avoided, the air is promoted to flow more uniformly in the filtering layer, and the air filtering effect is improved. Particulate matters and impurities have more opportunities to be captured, so that the overall filtering effect is improved.

This utility model relates to the field of cell disruption and filtration technology, and more particularly to a self-cleaning, anti-clogging cell disruption and filtration device. The technical solution is as follows: A self-cleaning, anti-clogging cell disruption and filtration device includes a shell, a collection frame, a fixed ring plate, a connecting shaft, and a fixed shell; the collection frame is slidably placed at the lower part of the shell, the fixed ring plate is fixedly connected inside the shell, the connecting shaft is rotatably connected to the upper part of the fixed ring plate, and the fixed shell is fixedly connected to the left side of the shell. This utility model performs preliminary filtration through a filter membrane, trapping larger fragments, while small particles and liquid permeate through the filter membrane into the collection frame. A motor drives the connecting shaft to rotate, causing the filter membrane to rotate slowly, evenly distributing cell fragments and avoiding localized accumulation. When the ultrasonic generator is activated, the high-frequency electrical signal is converted into mechanical vibration, and the resulting "cavitation effect" not only effectively breaks down the cell membrane but also releases the cell contents.

The application discloses a method for synthesizing tervalent tetraaryl iron porphyrin from pyrrole, aromatic aldehyde and ferrous salt, which comprises the following steps: adding anhydrous aluminum chloride, aromatic aldehyde, pyrrole and ferrous salt into DMF under stirring, and then heating and refluxing the reaction mixture for 0.5 hours under nitrogen; removing the nitrogen and continuing to heat the reaction mixture for a certain time; stopping the reaction; cooling the reaction mixture; and placing the reaction mixture at 273K overnight; and finally filtering the reaction mixture to obtain the iron porphyrin.

The invention belongs to the technical field of biology, and relates to a bronchoalveolar lavage fluid (BALF) preserving fluid, a kit and a cytological test method. The preservation solution is composed of TCEP, N-acetylcysteine, EDTA.2Na, trehalose, Proclin300, methanol, sodium chloride and HEPES, and all the components have a synergistic effect to achieve sample viscosity removal, oxidation resistance, corrosion prevention, cell protection and pH stabilization. The preserving fluid is suitable for morphological observation and nucleic acid detection of BALF cells, and can stably preserve samples at room temperature and maintain completeness of cell membranes and clear morphological structure. The kit comprises two preparations which are mixed to form a working solution, and the working solution can be directly used for sample preservation on a sampling site. The cytological test method comprises the steps of sample collection, preservation, centrifugal slide preparation, Wright-Giemsa staining and microscopic observation. Experimental results show that preservation solutions of different formulas are compatible with a chromosome system, the cell morphology is kept stable within 3 days, the dyeing effect is good, and it is proved that the preservation system can remarkably improve the preservation stability and detection reliability of BALF samples and is suitable for cytology and molecular diagnosis application of lower respiratory diseases.

The invention discloses a cooling assembly, a heat dissipation device and a vehicle. The cooling assembly comprises a shell and a partition plate. The partition plate is arranged in the shell to divide the shell into a first sub-cavity and a second sub-cavity, and a plurality of spraying holes are formed in the partition plate to spray a cooling medium in the first sub-cavity to the second sub-cavity, so that bubbles generated by the second sub-cavity are separated from the shell. Therefore, the cooling medium is introduced through the first sub-cavity and forms jet flow in the jet hole, so that the jet flow can break bubbles generated by the second sub-cavity, the bubbles are changed into small bubbles, the bubbles are prevented from gathering to form large bubbles, the cooling medium can always infiltrate the bottom surface of the circulation channel, and the heat dissipation capability of the cooling assembly is enhanced.

This utility model relates to vehicles, specifically providing a differential, a vehicle transmission assembly, and a vehicle, aiming to solve the problem of excessive internal oil pressure affecting the sealing effect of the oil seal in the differential. To this end, the differential of this utility model includes: a support base with a first through hole, the inner wall of which has an annular groove; an input shaft; and an adjusting ring disposed within the annular groove, with a clearance fit between the adjusting ring and the inner wall of the annular groove, allowing oil to flow through the gap on both sides of the adjusting ring. This utility model, by setting an adjusting ring within the through hole of the differential support base and ensuring a clearance fit between it and the inner wall of the annular groove, achieves free flow of oil under normal operating conditions; when a large oil pressure difference occurs on both sides of the adjusting ring, the adjusting ring automatically adheres to the inner wall of the annular groove under pressure, promptly sealing the gap and effectively isolating the oil flow. This structure can dynamically adjust the internal oil pressure of the differential without changing the original arrangement.

A photomask, a method of forming a pattern, a method of manufacturing a display device, and an electronic device are provided. The photomask includes a transparent substrate having a first surface and a second surface opposite each other, a first semi-transparent layer disposed on the first surface of the transparent substrate, a light-blocking layer disposed on the second surface of the transparent substrate, and a second semi-transparent layer disposed between the second surface of the transparent substrate and the light-blocking layer. The second semi-transparent layer has a transmittance higher than that of the first semi-transparent layer.

The application discloses a kind of water gate intelligent ecological flow scheduling device, by layered gate body mechanism, flexible bionic fishway guide vane assembly, sluice bottom microtopography bionic lifting adjustment base, fish attracting module and controller constitute;Wherein, layered gate body mechanism is created by the difference of different fish migration water layer matching flow pattern with multiple vertically distributed gate plate.This application also discloses a kind of fish attracting method based on water gate intelligent ecological flow scheduling device, comprising: S1, fish species identification and strategy selection, S2, pre-induction aggregation, S3, smooth migration, S4, safe crossing.The application realizes the intelligent fish crossing strategy of first induction and then guidance, slow and fast complementation by controlling gate plate dynamic opening and closing and bionic base lifting in stages, effectively reduces the stress response of fish, and improves the success rate of target fish species crossing.

This invention discloses a refractory high-entropy alloy resistant to high-temperature molten aluminum corrosion and erosion-wear, its preparation method, and its applications. The refractory high-entropy alloy of this invention comprises, by atomic percentage: 40-50 at.% Nb, 35-40 at.% Ti, 4-10 at.% Mo, 4.5-5 at.% Cr, and no more than 10 at.% Al. This invention obtains the refractory high-entropy alloy by mixing and melting the raw materials under a protective atmosphere. The refractory high-entropy alloy ingot of this invention has a single-phase BCC microstructure, exhibiting stable structure, good mechanical properties, and excellent resistance to molten aluminum corrosion and erosion-wear. The Nb-Ti-Mo-Cr based refractory high-entropy alloy resistant to molten aluminum corrosion and erosion-wear prepared using this invention can significantly improve the service life of components, reduce replacement frequency, and has high economic benefits.

The utility model discloses water quality aeration purification equipment suitable for high ammonia nitrogen fishpond culture wastewater, which comprises a device body, a protection box is arranged in the device body, a base is arranged below the protection box, a suction pump is arranged in the protection box, a mounting rack is connected below the base, and the mounting rack is provided with a water inlet. A first water tank, a second water tank and a third water tank are sequentially connected to the lower portion of the mounting frame, the front end of the suction pump is connected with a water pumping pipe, the rear end of the suction pump is connected with a water inlet pipe, a first placing table and a second placing table are connected to the outer wall of the protection box, a first pesticide box is arranged above the second placing table, and a second pesticide box is arranged above the first placing table. According to the device, the content of dissolved oxygen in wastewater can be increased, a proper aerobic environment is provided for subsequent biological treatment, the concentration of ammonia nitrogen in the wastewater is reduced, the water quality of a fishpond is improved, precipitation of sludge and formation of an anaerobic environment are avoided, and subsequent stable operation of the device is ensured.

The utility model provides a film tearing and exhausting synchronizing device of an automatic film sticking machine, which comprises a machine body, a film tearing mechanism and a pushing and exhausting mechanism, a top plate of the machine body is provided with a working area and a positioning block, the working area can be used for positioning and fixing a product to be subjected to film sticking, and the positioning block is arranged on the outer side of the working area and can be used for positioning a film sticking material; the film tearing mechanism is arranged at the rear end of the machine body and can pull the second release film to be gradually separated from the protective film from front to back; the pushing and exhausting mechanism is arranged on the machine body in a front-back moving mode and can synchronously push and press the separated protective film to be attached to a product to be subjected to film attaching from front to back in the separation process of the second release film and the protective film of the film attaching material, and air below the attaching face of the protective film is exhausted. By the adoption of the film pasting device, automatic film pasting operation is achieved, bubbles and dust can be prevented from entering the film pasting device to a great extent, the requirements for reworking, film tearing and re-pasting are reduced, time is saved, and the rejection rate of protective films is reduced.

The invention relates to the technical field of shredding machine cutter machining, and discloses a forming machine tool for a shredding machine tooth-shaped blade, which comprises a machine tool main body, the machine tool main body comprises a forming mechanism, the forming mechanism comprises a controller, a laser cutting head is arranged above the machine tool main body, and a laser generator is fixedly mounted on the outer surface of the machine tool main body. The laser cutting head is electrically connected with the laser generator through a wire, and an isolation assembly is arranged in the machine tool body. According to the forming machine tool for the tooth-shaped blade of the shredding machine, through the arrangement of the isolation assembly, the device moves along with a laser cutting head through the arrangement of an isolation cover, so that a sealed environment is provided for blade cutting, external oxygen is isolated, meanwhile, nitrogen is sprayed to the cutting position through a spray head through an air pump, and the cutting efficiency is improved. Therefore, outside oxygen is further isolated through inert gas, formation of an oxide layer is avoided, the phenomenon that the oxide layer falls off when the blade is used is avoided, and the service life of the blade is guaranteed.

This utility model discloses a processing device for three-dimensional relief pieces, belonging to the field of three-dimensional relief piece processing technology. It includes two supports, with a horizontal plate fixedly connected between the two supports. A connecting frame is provided on the outer side of the horizontal plate, and a turntable is rotatably connected to the bottom of the connecting frame. Multiple annularly distributed cleaning soft columns are fixedly connected to the bottom of the turntable. It also includes a moving component and a limiting component. The moving component drives the cleaning soft columns to repeatedly clean the surface of the three-dimensional relief piece. After the metal engraving is completed, the cleaning soft columns can quickly clean the surface of the workpiece, promptly removing metal debris generated during the processing, and preventing debris from staying on the workpiece surface for too long and forming scratches. The cleaning soft columns 7 rotate at high speed with the turntable, and their rotational motion can generate strong centrifugal force, which can more thoroughly remove the metal debris attached to the surface of the workpiece, greatly reducing the risk of scratches caused by debris residue.

The application discloses a kind of with gradient buffer structure and surface microtexture enjoy floor and its preparation method.The floor includes surface microtexture layer, gradient solidification UV coating, gradient buffer structure, substrate layer and fast lock buckle system.Surface microtexture layer has double texture of pit array and microprojection array, realize wet / dry state antiskid, easy cleaning and scratch resistance.Gradient buffer structure is made of surface layer microresponse layer, core energy absorption layer and bottom stress dispersion layer, realize nonlinear impact response, give consideration to walking stability and fall protection.Through finite element simulation to buffer layer predeformation compensation, eliminate warping;Pit edge stress concentration activates buffer layer, shortens impact response time 15%-25%.The application first realizes the integration of old and pet friendly function, is applicable to home old and pet family, with excellent buffering, antiskid, durable, easy maintenance performance.

The application discloses a kind of based on double-layer non-periodic random topology metallized film and its preparation method, the metallized film based on double-layer non-periodic random topology, including the fuse bridge being arranged on the surface of film dielectric, the fuse bridge includes multiple macroscopic fuse bridges, multiple the macroscopic fuse bridge is connected to form macroscopic tessellation polygon net, multiple microcosmic fuse bridges are arranged in each grid of the macroscopic tessellation polygon net, and multiple microcosmic fuse bridges in each grid are connected to form microcosmic tessellation polygon net.This metallized film breaks the periodicity limit from the geometric topology level, and can realize interlayer space avoidance after winding and can be differentiated protection for different regional stress characteristics.

The cross-shaped pipe pulling device comprises a hydraulic device and a pipe pulling frame, the hydraulic device is used for providing pulling force, the pipe pulling frame is provided with four through holes or opening grooves used for detachably and fixedly installing a mold, and the center connecting lines of every two opposite through holes or opening grooves are distributed in a cross shape. By means of the distributed cross-shaped mold layout, compared with an existing barrel-shaped steel mold, the self weight of a single mold and the bonding force between the single mold and initial set concrete are obviously reduced, the needed pulling force is obviously reduced, and a smaller hydraulic device can be adopted for pulling; the probability that the mold cannot be pulled out or even is damaged due to the fact that the adhesive force between the mold and the node pile initial set concrete is too large in the pulling-out process is greatly reduced.

The utility model provides a machine room cooling device which comprises a cooling plate arranged on the inner wall of a machine room and cooling equipment arranged outside the machine room, a circulating water pipe is arranged in the cooling plate, and the circulating water pipe is connected with the cooling equipment; the reciprocating driving unit comprises a double-screw column rotationally arranged at the top of the cooling plate and a driving source for driving the double-screw column to rotate; the cleaning unit comprises a driving block arranged on the double-spiral column, a reciprocating arm arranged on the driving block and a scraping arm elastically connected with the reciprocating arm, the scraping arm abuts against the cooling plate, and the scraping arm is used for cleaning the cooling plate; the scraping arm abuts against the cooling plate, along with rotation of the double-spiral column, the driving block moves on the double-spiral column, the reciprocating arm and the scraping arm are driven to reciprocate, water attached to the surface of the cooling plate can be scraped away in time, and it is avoided that the water accumulates on the surface of the cooling plate to form a heat insulation layer; therefore, the cooling plate can continuously absorb heat in the machine room in a good state, and a good cooling effect is maintained.

The utility model discloses a sand core structure for casting a casting through hole, which belongs to the technical field of casting processing, and is technically characterized by comprising a first casting box and a second casting box arranged above the first casting box, and the first casting box is connected with the second casting box through bolts; the flowing path of a metal solution is prolonged through the design of the snakelike groove, the flowing speed is remarkably reduced, the gas entrainment risk caused by turbulent flow is reduced, the angle of the first positioning shell and the position of the discharging hopper can be rapidly adjusted through the arrangement of the sliding rail, the adjustable first supporting rod and the adjustable second supporting rod and the linkage design of the multiple clamping grooves, and the working efficiency is improved. The feeding port of the sand core body is accurately matched, gas in a cavity can be efficiently exhausted through the exhaust hole with the inclined angle and an active exhaust and multi-stage exhaust system of the exhaust fan, air holes are prevented from being formed, and therefore the surface smoothness and the internal compactness of a casting are greatly improved.

The application discloses a kind of oil-containing water body separation membrane for refining process of Bupleurum volatile oil and preparation method and application.The preparation method of the application is first mixed and dissolved according to proportion with cellulose acetate and cellulose nitrate powder, form casting membrane liquid, and the base membrane is prepared using non-solvent phase conversion method;Second, the film is deacetylated;After that, it is soaked in acyl chloride n-hexane solution for crosslinking;Finally, by in-situ hydrolysis of silane coupling agent on the membrane surface, a hydrophobic surface is prepared, and an oil-containing water body separation membrane for refining process of Bupleurum volatile oil is obtained.This method forms a hydrophobic layer on the surface of the membrane, which strengthens the rapid passage of Bupleurum volatile oil molecules and inhibits the penetration of water;Using the oil-containing water body separation membrane avoids the formation of emulsion during oil-water separation, showing high separation efficiency and stability, and widening the application of cellulose acetate membrane in traditional Chinese medicine preparation process.

The application discloses a kind of based on nano microcrystalline metal powder and organic liquid hydride multi-medium composite slurry hydrogen storage material and its preparation method, and multi-medium composite slurry hydrogen storage material includes nano microcrystalline metal powder for hydrolysis heat production, hydrogen release endothermic organic liquid hydride and catalyst;Nano microcrystalline metal powder content is 1~40wt.%, and organic liquid hydride content is 50~95wt.%, and the content of catalyst is 1~25wt.%.The application combines the advantages of metal powder and organic liquid hydride, by covering metal powder in organic liquid hydride, on the one hand, the passivation problem of metal powder surface is solved, effectively isolates metal powder and air contact, prevents the formation of oxide;On the other hand, the heat generated by the reaction of metal and water is absorbed by organic liquid hydride, thereby improving the mass transfer efficiency, and reducing the energy loss in heat transfer process.

The utility model discloses a layered and opposite type sinking burner for ladle roasting, including gas pipeline, primary air casing, secondary air casing and tertiary air casing, the upper end of gas pipeline is used for with gas supply pipeline intercommunication and the lower end opening forms gas spout, the gap between primary air casing and gas pipeline forms primary air channel, the gap between secondary air casing and primary air casing forms secondary air channel, the gap between tertiary air casing and secondary air casing forms tertiary air channel, and primary air channel, secondary air channel and tertiary air channel are all used for with preheating combustion air pipeline intercommunication, and the lower end opening of primary air casing forms primary air spout, and the lower end opening of secondary air casing forms secondary air spout, and the lateral wall of tertiary air casing is equipped with a plurality of tertiary air spout. Can guarantee the full mixing of gas and combustion air, and can make full use of the heat of high temperature flue gas, and can carry out effective afterburning treatment to the unburnt component remaining in high temperature flue gas.

The application discloses a kind of enhanced Sn-Ag-Cu low silver lead-free solder and its preparation method and application, and the specific components of enhanced technical scheme are as follows: Cu: 0.5%~1.0%, Ag: 0.1%~1.0%, La: 0.002%~1.2%, Ge: 0.002%~1.3%, Co: 0.001%~1.2%, and the rest is Sn, calculated by mass percentage. Under the joint action of the added elements, the microstructure of the solder can be improved, thereby effectively enhancing the creep resistance of the solder, greatly improving the fatigue life of the solder at high temperature, and significantly improving the reliability of the solder.

The present application relates to a kind of grinding rotor, including top wall, and with top wall connection side wall, grinding rotor inside is opened with grinding inner cavity, the outer periphery of side wall is provided with multiple grinding bars, the cross-sectional area of grinding bar is along the decreasing trend of grinding rotor radial direction from inside to outside, at least part grinding bar is provided with first inclined plane in the face side along the direction of rotation of grinding rotor, first inclined plane is arranged with horizontal plane angle;Side wall is provided with several heterodirectional variable-diameter channels, each heterodirectional variable-diameter channel is gradually tapered from inside to outside, each heterodirectional variable-diameter channel includes top surface, first side, bottom surface and second side connected in sequence, top surface and bottom surface are arranged with angle between them. Through the design of grinding bar and heterodirectional variable-diameter channel and cooperate with separating wheel assembly, avoid forming grinding dead zone in grinding cavity, and effectively improve the grinding efficiency and grinding uniformity.The present application also relates to vertical nanometer sand mill with the grinding rotor.

The utility model relates to a socket mounting assembly for gypsum board installation, the mounting assembly includes the positioning piece and sets up the adjusting portion of positioning piece, the adjusting portion includes adjusting rod and limit piece, the adjusting rod acts on limit piece realizes limit piece relative to the change of positioning piece from first state to second state, the first hole is opened in the center of positioning piece, along the first hole hole edge is evenly provided with first convex part and second convex part respectively, the positioning piece is provided with the baffle at one side end face, still is provided with third convex part on the outer ring surface of the end away from baffle. Form half closed structure through the design of the first hole and the baffle of positioning piece, replace traditional pre -buried bottom box, avoid forming local stress concentration point on light gypsum board, and the bidirectional joint design of third convex part and limit piece disperses the load evenly to the opening edge of gypsum board, significantly reduces the deformation cracking risk of gypsum board or suspended ceiling due to local stress.

The utility model discloses mining slurry stirring equipment which comprises a mixing tank, a stirring device and a stirring device, wherein a mounting frame is connected to the lower part of the mixing tank; and the first mixing mechanism is connected to the interior of the mixing tank. A first driving motor drives a mixing frame on a first driving rod and a plurality of mixing rods to turn over materials in the forward direction, a second driving motor drives a first inclined material turning blade and a second inclined material turning blade on a second driving rod to turn over materials in the reverse direction, and due to the arrangement of a first mixing mechanism and a second mixing mechanism, the mixing directions are opposite; stirring is conducted from different angles and directions, the uniform mixing effect is improved, a third driving motor drives a plurality of smashing blades on a third driving rod to work, large or thick materials can be rapidly and effectively smashed, the situation that the materials form large blocks or agglomerates in the mixing process is avoided, the fluidity and the filling effect of slurry are improved, and the production efficiency is improved. Therefore, the overall efficiency and quality of slurry preparation are improved.

The invention relates to the technical field of cells, in particular to a solar cell and a preparation method thereof, and the preparation method comprises the following steps: adding a hole transport material and a first perovskite material into a solvent to prepare a mixed solution; coating a substrate with the mixed solution, and performing annealing treatment to obtain a composite hole transport layer; coating the composite hole transport layer with a perovskite precursor solution, and performing annealing treatment to obtain a perovskite layer; the perovskite precursor solution comprises a second perovskite material, and the second perovskite material is the same as the first perovskite material. According to the preparation method of the solar cell provided by the invention, the perovskite seed crystal with the same components as the perovskite layer is pre-buried in the composite hole transport layer, and the perovskite seed crystal is used as a nucleation site to induce the perovskite layer to crystallize from bottom to top, so that the generation of bottom holes is inhibited.