33results about How to "Uniform particles" patented technology

This invention discloses a method for preparing high specific surface area cerium phosphate nanoparticles. The modified corn starch in this invention exhibits good water solubility, resulting in a solution with good suspension and stability after dissolving in water. This suspension stability provides a spatial carrier for the formation of cerium phosphate nanoparticles. A network structure is formed through hydrogen bonding between the molecular weight chains of the modified corn starch, allowing control over the uniformity of cerium phosphate particle size. Different specific surface area values ​​of cerium phosphate can be controlled by adjusting the concentration of the modified corn starch. The modified corn starch can be removed through subsequent high-temperature sintering and washing, ultimately yielding high-purity cerium phosphate nanoparticles. These nanoparticles possess uniformity and high specific surface area, making them suitable for applications in electrode materials, adsorbent materials, luminescent materials, and polymer nanofillers.

The invention belongs to the technical field of dibromohydantoin production, and particularly provides a dibromohydantoin synthesis method which comprises the following steps: S1, preparing a raw material aqueous solution, namely respectively mixing dimethyl hydantoin, sodium bromide and liquid caustic soda NaOH with deionized water to form a dimethyl hydantoin aqueous solution, a sodium bromide aqueous solution and a liquid caustic soda NaOH aqueous solution; s2, premixing the raw material aqueous solution, namely mixing the aqueous solution of dimethyl hydantoin, sodium bromide and caustic soda liquid NaOH prepared in S1 to obtain a premix; s3, electrochemical in-situ bromination reaction: introducing the premix into a micro-channel reactor provided with an electrolysis electrode, and applying current to the premix to obtain a dibromohydantoin initial solution; and S4, crystallizing, separating and drying the product, carrying out cooling crystallization through a three-stage stepped cooling method to obtain a dibromohydantoin crystal, carrying out centrifugal separation to obtain a dibromohydantoin wet product, and then drying to obtain a dibromohydantoin finished product. The method can improve the generation stability and the product quality of the dibromohydantoin.

The present application relates to the field of environment-friendly materials and its preparation technology, and particularly relates to a degradable environment-friendly paper cup interior coating and a preparation method thereof. The method comprises the following steps: firstly, synthesizing polymerizable quaternary ammonium salt surfactant (RPKO-X), and then introducing the polymerizable quaternary ammonium salt surfactant and a bio-based polymer solution into a polyacrylate molecular chain by a redox initiation polymerization method, so as to obtain a degradable acrylate emulsion for paper cup interior coating. By introducing the hydrophobic monomer RPKO-X with emulsifier characteristics, a stronger crosslinking network is formed, which can significantly improve the water resistance and oil resistance of the coating. Meanwhile, by introducing the bio-based material polyvinyl alcohol 2688, the environmental friendliness of the coating is enhanced, and the rapid degradation of the coating after use is promoted. By using the redox initiation polymerization system, the method is simple to prepare, can be prepared under mild conditions, and the emulsion particle size is uniform and stable.

The application provides a BiFeO3-graphitic carbon nitride photocatalyst and a preparation method and application thereof, relates to the field of photocatalysis technology, and the preparation method comprises the following steps: dissolving a bismuth source and an iron source in a solvent, mixing with a mineralizer, and performing a hydrothermal synthesis reaction to obtain BiFeO3; performing first calcination treatment on a nitrogen-containing organic precursor to obtain graphitic carbon nitride; and performing grinding treatment and second calcination treatment on the mixture of BiFeO3 and graphitic carbon nitride to obtain the BiFeO3-graphitic carbon nitride photocatalyst. The preparation method can construct a Z-type heterojunction at the interface of the separately prepared BiFeO3 and graphitic carbon nitride, form an internal electric field, efficiently separate photo-generated electrons and holes, effectively inhibit the recombination of the photo-generated electrons and holes, finally significantly enhance the redox capacity of the material, and make the material exhibit excellent photocatalytic performance, high selectivity and good cycle stability.

This invention relates to the field of ion sieve technology, providing a titanium-based lithium-ion adsorbent, its preparation method, and its applications. The invention involves pyrolyzing NH2-MIL-125(Ti), then mixing it with lithium carbonate for calcination, granulating it using an ethylene-vinyl alcohol copolymer as a binder, and finally acid washing to obtain the titanium-based lithium-ion adsorbent. This invention integrates metal-organic framework (MOF)-derived carbon intercalation, nitrogen doping, and polymer-assisted granulation into a single process, preparing a particulate adsorbent with a hierarchical porous structure, strong hydrophilicity, and abundant active sites, showing great potential for industrial applications. Example results show that the adsorbent of this invention, under conditions of pH=12 and 25℃, exhibits a high Li-ion concentration of 24 h. + The adsorption capacity reached 33.95 mg / g. After five cycles of adsorption and desorption, the adsorption capacity could still reach 96.9% of the initial adsorption capacity, and the titanium dissolution loss in each cycle was only about 0.4%.

The invention relates to the field of lithium batteries, and discloses a method for preparing lithium iron phosphate from waste lithium iron phosphate, which comprises the following steps: carrying out first sintering on waste lithium iron phosphate to obtain red powder I; detecting the contents of main elements and impurity elements in the red powder I; supplementing at least one of a lithium source, a phosphorus source, a titanium source and a vanadium source by taking the iron element as a reference according to a detection result; or detecting the contents of main elements and impurity elements in the waste lithium iron phosphate, supplementing the lithium source according to the detection result, sintering, and then supplementing at least one of the phosphorus source, the titanium source and the vanadium source; and finally, grinding, spray drying and sintering to obtain the lithium iron phosphate material. By accurately controlling the molar ratio of lithium, iron, titanium, vanadium and phosphorus, the lithium ion diffusion coefficient of lithium iron phosphate is improved from the atomic level, generation of magnetic foreign matters in the high-temperature sintering process of lithium iron phosphate crystals is inhibited, meanwhile, material particles are uniform, and the main phase purity is greatly improved.

The utility model discloses a raw material mixing device for food processing, which comprises a mixing cylinder, a cylinder body cover arranged at the top end of the mixing cylinder, a grinding cylinder erected at the top of the cylinder body cover, material guide pipes symmetrically connected with two ends of the top surface of the cylinder body cover in a penetrating manner, a screen frame groove formed in the inner side of the top end of each material guide pipe, and a filter frame embedded in the screen frame groove, a filter screen is fixedly laid on the top surface of the filter frame, discharge openings are symmetrically formed in the two ends of the bottom surface of the grinding cylinder in a penetrating mode, frame pressing rings are fixedly connected to the top ends of the inner sides of the discharge openings, and a grinding disc is arranged in the grinding cylinder; a grinding and screening dual-pretreatment structure is additionally arranged, the grinding disc in the grinding cylinder is matched with the rough grinding surface, granular or caked raw materials can be ground and refined, the filter frame and the filter screen are matched to screen the ground raw materials, and it is ensured that raw material particles entering the mixing cylinder are uniform; the problem of non-uniform mixing caused by non-refining of the raw materials is effectively solved, and the quality of a mixed finished product is remarkably improved.

The application discloses a composite positive electrode material applied to a sodium ion battery and a preparation method thereof, which is obtained through one-step reaction sintering of five phases of sodium phosphate, zirconium dioxide, silicon dioxide, sodium carbonate and manganese dioxide by a planetary ball mill, drying, sieving and calcining. The composite positive electrode material can obtain two phases through a precursor one-step method, the product is more uniform, the operation is simple and easy to implement, the time consumption is short, the method is economic and environment-friendly, and is beneficial to industrialized production. The composite material can be applied to a sodium ion battery, and the cycle stability of the composite material is better than that of a pure phase Na 0.7 MnO 2.05 .

This invention discloses a method for preparing beryllium-aluminum alloy composite materials, belonging to the field of alloy composite material technology. The method includes: uniformly mixing beryllium powder with an average particle size of less than 18 μm and aluminum powder with an average particle size of less than 48 μm at a mass percentage of 56-66% and 34-44%, respectively, and then loading the mixture into a mold; placing the mold containing the mixed powder into a sintering furnace and performing vacuum pressure-activated sintering to obtain a beryllium-aluminum sintered ingot; and subsequently performing peeling and mechanical processing on the beryllium-aluminum sintered ingot. This invention's method can suppress the growth of beryllium-aluminum alloy particles, resulting in fine and uniform grains, high interfacial bonding strength, good product performance, uniform heating, rapid heating rate, low sintering temperature, short sintering time, and high production efficiency.

This invention belongs to the field of peroxide production technology, specifically relating to a continuous production apparatus and method for lauroyl peroxide. The continuous production apparatus for lauroyl peroxide includes a primary reactor, to which a secondary reactor, a tertiary reactor, and a filter tank are sequentially connected. Each of the primary, secondary, and tertiary reactors is equipped with a stirrer, with a spiral plate threaded onto its upper part. A motor is connected to the top of the stirrer. A conveyor belt is installed inside the filter tank, and a mother liquor outlet is located in the center of the bottom plate. The bottom plates on both sides of the mother liquor outlet are inclined. A primary washing tank, a secondary washing tank, and a tertiary washing tank are sequentially connected to the filter tank. Each of the primary, secondary, and tertiary washing tanks is equipped with a filter screen and a sprayer. This invention employs a multi-reactor series continuous production process, resulting in higher production efficiency and more stable operation.

The utility model discloses a kind of municipal gardens'soil loosening device, including support module, drive module and action module, the support module includes installation platform and drive installation shell, the installation platform is fixedly installed in the top of the drive installation shell;The drive module includes motor, drive rod and drive wheel, the motor is fixedly installed in the top of the installation platform, the drive rod and the drive wheel are all built-in in the drive installation shell, the top of the drive rod is connected with the drive end of the motor and the bottom of the drive rod is equipped with drive screw thread, the drive wheel is engaged with the drive screw thread.The utility model discloses a kind of municipal gardens'soil loosening device, overcome the defects, such as low efficiency, poor soil loosening effect, inconvenient operation and insufficient safety of municipal garden soil loosening equipment in the prior art.

The utility model relates to ink processing technical field, the utility model provides a kind of high-efficiency sand mill for ink processing, it includes base, the top of base is fixedly connected with sand mill, the top one side of sand mill is fixedly connected with feed pipe, the top inner wall of feed pipe is fixedly connected with discharge pipe, the top of discharge pipe is fixedly connected with pretreatment box, worm drives worm wheel rotation and further drives transmission shaft rotation, reduce by worm and worm wheel, transmission shaft rotation drives incomplete gear rotation, rack drives movable rod and baffle to move, baffle movement makes the shielding failure of discharge pipe, material is ground into sand mill by feed pipe, when rack and incomplete gear do not contact, spring reset drives movable rod reset, and further makes baffle reset and shields discharge pipe, realizes intermittent feeding. By the above technical scheme, the technical problem of low processing efficiency in the prior art is solved.

The application discloses high-purity copper sulfide prepared from acid wastewater and a method thereof, and belongs to the technical field of metallurgy, and particularly relates to a method for recovering high-purity copper sulfide from molybdenum metallurgical wastewater. In the method, first, sodium hydroxide is used to adjust PH, so that heavy metals such as copper and iron are precipitated, and molybdenum exists in the form of molybdate in the solution, and separation of molybdenum is realized. After the separation, the precipitate is subjected to ammonia reverse dissolution, sodium hydrosulfide precipitation, water washing, acid washing and water washing, and finally high-purity copper sulfide with qualified quality is obtained. The application takes "alkaline complexation-selective sulfidation precipitation-purification and refining" as the core, and successfully recovers high-purity copper sulfide (purity greater than or equal to 99.5%) from copper-iron-containing heavy metal wastewater.

The utility model discloses a crushing device for acetaminophen tablet production, which comprises a rack, a barrel shell is mounted on the rack, a motor is mounted at the front end of the barrel shell, an output shaft of the motor is connected with a rotating shaft, the rotating shaft is symmetrically sleeved with supporting frames, the supporting frames are connected to two ends of an inner grinding barrel, and an outer grinding barrel is sleeved outside the inner grinding barrel. The upper part of the outer curved surface of the outer grinding barrel is connected to the inner wall of the barrel shell through a supporting rod, and a screen is arranged at the lower part of the outer grinding barrel; the grinding machine is simple in structure, reasonable in design and novel and unique in thought, the motor drives the inner grinding cylinder to rotate, the outer grinding teeth of the inner grinding cylinder and the inner grinding teeth of the outer grinding cylinder rotate relatively to grind raw materials between the teeth into powder, the screen is used for filtering, then powder is obtained, powder particles are uniform, the powder processing speed is high, and the grinding efficiency is high. In addition, the meshed temperature between the inner grinding teeth and the outer grinding teeth is increased and decreased through rotating wind of the fan blades, and powder is not affected.

This invention discloses a method for low-temperature pressing purification and dewaxing of Torreya grandis kernels, comprising at least the following steps: S5.1 Pre-preparation of a composite filter layer: After pre-cooling the filter chamber of a vacuum filtration device, a filter screen and a filter membrane are laid in sequence, and nitrogen is introduced to remove impurities; S5.2 Gradient negative pressure filtration: The initially dewaxed oil is injected into the filter chamber at low temperature, first pre-filtered at -0.05MPa to -0.06MPa for 10 minutes, then deep filtered at -0.08MPa to -0.09MPa for 20 to 30 minutes to retain trace wax crystals; S5.3 Nitrogen purging to remove water: The dewaxed oil is introduced into a low-temperature oil storage tank, and nitrogen is continued to be introduced to remove water and prevent oxidation; S5.4 Finished product fine filtration: The dewaxed oil is slowly heated and then finely filtered through a filter screen to obtain Torreya grandis finished oil. Gradient negative pressure filtration retains trace wax crystals in Torreya grandis oil. This invention employs a gradient negative pressure dewaxing step, which ensures sufficient driving force to accelerate the filtration speed and utilizes the formed filter cake layer as a secondary filtration medium to efficiently retain trace amounts of residual wax crystals. This approach ensures a high dewaxing rate while shortening the filtration time and improving production efficiency.

A kind of high-temperature evaporation equipment for manufacturing nanometer metal powder, including water-cooled barrel shell, water-cooled hemispherical shell, evaporation chamber, cooling water inlet A, cooling water cavity A, cooling water inlet C, plasma cathode column, cooling water inlet D, hemispherical shell cooling water passage, cooling water inlet B, crucible wall petal, cooling water outlet A, plasma anode terminal stud, crucible bottom, cooling water outlet B, hemispherical shell cooling water passage, barrel shell cooling water passage;Its characterized in that: the upper portion of hemispherical shell cooling water passage is equipped with cooling water cavity A;Due to the effect that the hemispherical shell cooling water flow channel of high-temperature evaporation equipment is equipped with cooling water cavity A, the gathered water can be effectively and evenly distributed to hemispherical shell cooling water flow channel and barrel shell cooling water flow channel, so that the cooling efficiency of hemispherical shell cooling water flow channel is high, which is conducive to the evaporation of metal vapor, thereby promoting the production quality of nanometer metal powder;The service life of high-temperature evaporation equipment is improved.

The utility model discloses a multilayer screening device for peanut processing, including base, the top fixed mounting of base has the screening box, the top fixed feed hopper of screening box, the inside slide mounting of screening box has upper limit position bottom plate and lower limit position bottom plate, the top of upper limit position bottom plate is located and has upper filter box, the bottom slide mounting of upper filter box has first filter screen plate, the top of lower limit position bottom plate is located and has lower filter box, the both sides below the ball are all provided with fixed wheel, the outside fixed connection of fixed wheel has hydraulic telescopic handle. Compared with prior art device, through hydraulic telescopic handle can drive fixed wheel and carry out horizontal direction's relative movement, can pass the both sides of ball in turn in the process of fixed wheel movement, because the height difference of ball and both sides, thereby can make upper limit position bottom plate and screening box and take place up and down and shake, and two mesh diameter different upper filter boxes can filter and screen peanuts in turn.

The invention discloses a water suspending agent containing prothioconazole, bixafen and trifloxystrobin and a preparation method of the water suspending agent. The suspending agent comprises the following components in percentage by weight: 1-50% of prothioconazole active compound, 1-50% of bixafen active compound, 1-50% of trifloxystrobin active compound, 1-15% of dispersing agent, 1-10% of wetting agent, 1-10% of antifreezing agent, 0.1-5% of thickening agent, 0.1-1% of preservative, 0.1-1% of defoaming agent and the balance of deionized water. The preparation method of the suspending agent containing prothioconazole, bixafen and trifloxystrobin is simple, the prepared suspending agent is stable in storage particle size and high in suspension rate of each component, and the problems that a compound suspending agent containing prothioconazole, trifloxystrobin and bixafen is low in suspension rate, layered and prone to blockage and collision during use due to the fact that the particle size is prone to growing in the heat storage process are solved. The suspending agent has the advantages of stable particle size, high suspension rate and stable product, and is beneficial to long-term storage and use.

The utility model discloses a rubber cyclic crushing device, and relates to the technical field of rubber processing, the rubber cyclic crushing device comprises a crushing assembly, and the bottom end of the crushing assembly is provided with a blanking assembly; the crushing assembly comprises a crushing bin, two crushing rollers and two rotating rods are rotatably mounted on the inner wall of the crushing bin, a group of crushing blades are fixedly mounted on the outer wall of each rotating rod, and an arc-shaped discharging opening is formed in the bottom end of the crushing bin; each discharging assembly comprises two arc-shaped baffles, connecting plates are fixedly connected to the outer walls of the two arc-shaped baffles, rotating shafts are fixedly installed on the outer walls of the two connecting plates, through mutual cooperation of the discharging assemblies, precise control over opening and closing of the two arc-shaped baffles is achieved, discharging can be conducted after rubber is smashed completely, and the discharging efficiency is improved. And meanwhile, the discharging speed and the discharging amount can be flexibly controlled according to actual production requirements, the adverse effect on the production process caused by too much or too little discharging is avoided, and the production stability and controllability are improved.

This utility model relates to the field of aquaculture equipment technology, specifically to a feed disinfection and feeding device for large-scale chicken farms. It includes a screw feeder body, comprising a conveying pipe, a motor adapted and installed on the outside of the conveying pipe, a screw rod fixedly connected to the output end of the motor via a coupling, a feed inlet connected to the top of the conveying pipe, and several feeding ports penetrating the bottom of the conveying pipe; a feeding mechanism including a grinding component for grinding feed that has not entered the conveying pipe. By setting up a feeding mechanism, this utility model can not only crush and shear feed particles of different sizes, making the originally inconsistent particle sizes more uniform, but also flexibly adjust the grinding particle size of the feed according to the feeding needs of the chickens. This achieves the effect of avoiding insufficient mixing due to particle differences while ensuring that the feed particle size is accurately adapted to the feeding needs of chickens of different ages.

This invention discloses a lithium-rich manganese-based layered oxide composite cathode material and its preparation method, belonging to the field of lithium-ion battery technology. The method includes: adding water to a nickel source, a cobalt source, and a manganese source to obtain a mixed solution; adding sodium carbonate solution to adjust the pH; washing with deionized water and centrifuging; drying; mixing with lithium salt; and pre-calcining to obtain Li. 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 1.8 F 0.2 The material was then subjected to a process involving the sequential addition of a carbon source and an organic solvent. The resulting mixture was heated under a mixed atmosphere to obtain a lithium-rich manganese-based basal oxide material. Na₂WO₄ and pyrrole were then added, and the mixture was dissolved in deionized water to obtain a composite cathode material, Li. 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 1.8 F 0.2 @N,S-C@Na2WO4@PPy. The composite cathode material of this invention has uniform particles, stable structure, and exhibits considerable wide potential window reversible capacity, excellent rate performance, and stable cycle life.

The utility model relates to food processing technical field discloses an upper exhaust pressure type spray drying tower, including base, the base top fixedly connected with support frame, support frame inner wall fixedly connected with drying tower, drying tower inner wall bottom fixedly connected with fluidized bed, the base top left side fixedly connected with high pressure pump, input end links feed pipe, and the output end is connected atomizing nozzle through the feed pipe, right side has air heater, connects the air pipe, and drying tower outer wall near top passes through fixed ring and links cyclone separator. Through high pressure pump, material is transported to the atomizing nozzle in the middle of drying tower inner wall through feed pipe, and material can be fully atomized into fine droplets, and the hot air that enters from air heater through air pipe forms efficient convection contact, and this central atomization design cooperates the upper exhaust structure, makes the contact area of hot air and material droplet maximization, and heat exchange is more fully, and drying time is shortened significantly, and the material processing capacity in unit time is improved.

The application discloses a preparation method and a preparation system for high-dispersion silicon dioxide for winter tires, and comprises the following steps: S1: solid sodium silicate is put into a static autoclave, steam is added to pressurize to 0.8-1.0 MPa and pressure is kept for 2 hours to obtain concentrated water glass; S2: the concentrated water glass is added with water to prepare a sodium silicate solution with a silicon dioxide content of 20-25 wt%, the sodium silicate solution is statically stored in a storage tank for more than 10 days, and then filtration is performed; and S3: sucrose fatty acid ester and concentrated sulfuric acid with a mass concentration of 98% are added into the sodium silicate solution, and the mixture is reserved after reaction. The silicon dioxide prepared by the application is specially used for winter tires, has high dispersion, uniform particles and good surface structure, can endow the winter tires with more excellent comprehensive performance, and sucrose fatty acid ester is added as a reaction regulator, so that the product has more excellent structural performance.

The invention discloses a mobile crushing station for recycling waste lithium batteries, and particularly relates to the technical field of battery recycling, the mobile crushing station comprises a base, a crushing and recycling assembly is arranged on the base, the crushing and recycling assembly comprises a crushing frame arranged at the top of the base, and a crushing rod is arranged in the middle of the crushing frame; and a plurality of second blades are arranged on the two sides of the inner wall of the crushing frame correspondingly, and a plurality of first blades are arranged on the crushing rod. In the whole process from quantitative feeding to graded collection, all the assemblies form tight linkage, for example, quantitative feeding and crushing rhythm matching, back flushing cleaning and filtering efficiency linkage and inert gas guarantee the safety and the separation effect at the same time, manual intervention is reduced, and the operation automation level is improved; and the design of dust recovery and efficient material separation improves the recovery rate of precious metals and recoverable materials.

The application discloses a method for preparing nanospheric iron phosphate by using ferroferric oxide, and comprises the following steps: S1, mixing an iron source with a morphology control agent, adding deionized water for mixing and dispersion stirring; S2, simultaneously adding concentrated phosphoric acid and an oxidizing agent drop by drop, reacting for 0.5-1 hours, then heating, and continuously reacting to obtain white precipitate; S3, centrifuging, filtering, washing, low-temperature drying and high-temperature sintering the white precipitate to obtain nanospheric iron phosphate. The prepared iron phosphate nanoparticles are uniform, present nanospheric, have high tap density, are easy to flow, and have good dispersibility. The formed iron phosphate particles are uniform, spherical, easy to filter and wash, beneficial to subsequent solid-liquid separation, have reduced material moisture content, have narrow particle size distribution range, uniform morphology and particle size, large tap density, and can obviously improve the electrochemical performance of lithium iron phosphate when used for synthesizing lithium iron phosphate materials, and the 0.2C discharge specific capacity is above 160mA·h / g.

The application discloses a cobalt-iron catalyst and a preparation method and application thereof. The cobalt-iron catalyst is composed of iron elements, cobalt elements, metal element A and metal element B; the metal element A is at least one selected from Mn, Cu, Zn, Ti, Al, Cr, Ni, Ce and Zr; the metal element B is at least one selected from Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr and Ba; in the cobalt-iron catalyst, the metal elements exist in the form of elements, oxidation states or carbonization states; in the cobalt-iron catalyst, taking the total mass of the metal elements as 100 wt%, the content of the iron elements is 30-99 wt%, the content of the cobalt elements is 30-99 wt%, the content of the metal element A is 0.1-60 wt%, and the content of the metal element B is 0.01-50 wt%.

The invention provides a preparation method of a short cylindrical W18O49 mesocrystal material, which comprises the following steps: S1, respectively dissolving tungsten chloride and oxalic acid in n-propyl alcohol according to a mass ratio of (3.5-4.5): 1, and stirring to obtain a mixed solution; s2, placing the mixed solution in a high-pressure kettle, carrying out heating reaction for 11-13 hours under the condition of 155-165 DEG C, and centrifuging and washing after the reaction is finished, so as to obtain a crude product; and S3, drying the crude product under a vacuum condition, so as to obtain the short cylindrical W18O49 mesocrystal material. The W18O49 mesocrystal material prepared by the invention has a short cylindrical structure and uniform particles; during preparation of the sensor material, metal doping and other treatments are not needed, so that the cost is greatly reduced; and the method has good sensitivity for NO2 gas detection, and the test conditions are mild.

The utility model discloses a vegetable planting soil plowing machine, which relates to the technical field of plowing machines and comprises a rack, the rack comprises a fixing frame, a motor is mounted on the top surface of the fixing frame, rotating blade groups are rotatably connected to two sides of the fixing frame, and a belt wheel transmission mechanism is in transmission connection between an output shaft end of the motor and a middle shaft of each rotating blade group. According to the utility model, the rotary blade group is driven to continuously and rotatably cut soil to realize rapid ploughing, and thrust is applied to enable the machine to move for operation, and the deep ploughing mechanism is driven to synchronously move along with the movement of the rack, so that the deep ploughing efficiency is improved, and the labor intensity of workers is reduced. The deep ploughing hook is used for longitudinally and transversely stirring the soil in the ploughing process, the compact soil is further crushed and loosened, the originally hardened soil becomes loose, pores of different sizes are formed, and the air permeability and the water permeability of the soil are improved.

This utility model discloses an injection molding device for producing plastic products, relating to the field of injection molding technology. The utility model includes an injection molding machine, and further includes: a feeding section mounted on the injection molding machine; a crushing section mounted on the feeding section; the feeding section includes a screening component mounted on the injection molding machine; and a hinged component disposed on the injection molding machine; the screening component includes a feeding hopper fixedly connected to the top of the injection molding machine, the bottom of which is connected to a feeding pipe. This utility model, by setting up a feeding section, solves the problem that existing injection molding devices often fail to ensure uniformity of raw material particles entering the injection molding machine, leading to uneven heating and insufficient melting of the raw material during subsequent plasticizing, ultimately causing defects such as bubbles, shrinkage cavities, and dimensional deviations in the injection molded products, significantly reducing product molding quality.

This invention discloses a pre-set scale spherical grinding minimally invasive bone harvesting device and its operation method, including a channel fixation module, a fixation tube, an outer sheath, an inner drive shaft, a rotation adjustment mechanism, and a drive device. The fixation tube is fixedly connected to the distal end of the channel fixation module. The proximal end of the outer sheath is rotatably mounted on the channel fixation module. The inner drive shaft is rotatably mounted in the distal end of the channel fixation module. The rotation adjustment mechanism is located at the proximal end of the inner drive shaft. A mesh cage is provided at the distal end of the outer sheath. A traction wire is connected between the rotation adjustment mechanism and the mesh cage to pull the mesh cage to expand to the pre-set bone harvesting diameter. The drive device drives the inner drive shaft to rotate the outer sheath, causing the mesh cage to perform spherical grinding of the bone. This invention can pre-determine the bone harvesting diameter through a pre-set scale, accurately control the bone harvesting volume, eliminate the need for repeated adjustments to the grinding range during surgery, and simplify the operation process.