42results about How to "Uniform dispersion" patented technology

This invention relates to the field of food preservation technology and discloses a liquid preservative for preserving fresh walnut kernels. The preservative comprises a natural preservative, a solubilizing and stabilizing agent, and a solvent. This liquid preservative uses natural phloretin as the preservative component, combined with Tween 80 as a solubilizing and stabilizing agent and ethanol as a solvent. This effectively solves the problems of poor water and oil solubility and inadequate stability of phloretin, allowing it to be stably dispersed in the preservative system and fully exert its antioxidant and antimicrobial effects. Furthermore, the preparation method is simple and easy to implement, and the production process is safe and controllable. It is convenient to use; the preservation of fresh walnut kernels can be achieved through dilution and soaking. The diluted solution can be reused, reducing usage costs. Simultaneously, it can inhibit bacterial growth during the storage of fresh walnut kernels, delay oxidative deterioration, maintain their good appearance and quality, extend shelf life, and meet the market demand for high-quality fresh walnut kernels.

The invention discloses a dosing device for sewage treatment of a water plant, and relates to the field of sewage dosing devices.The dosing device comprises a preparation device used for receiving medicine powder and water liquid, a medicine powder dispersing mechanism arranged above the preparation device and a storage mechanism arranged above the medicine powder dispersing mechanism; the water is dispersed into the preparation device and is mixed with the water liquid in the preparation device. The medicine powder dispersing mechanism comprises a screen frame, a guide part arranged in the center of the screen frame, a plurality of rotating shafts arranged on the outer side of the guide part in a surrounding mode along the circumferential track, and a plurality of sets of guide blades installed on the rotating shafts correspondingly. According to the preparation device, through dispersion operation on medicine powder, the medicine powder can uniformly fall from different positions above the preparation device at a constant speed, the problem that the local concentration is too high due to concentrated falling of the medicine powder is avoided, and meanwhile the caking phenomenon generated after the medicine powder falls in a concentrated mode and is fused with water liquid can be avoided; the medicine powder and the water liquid can be fully and uniformly mixed.

The utility model relates to glaze grinding technical field provides a glaze grinding with ball mill, including ball mill main part, support and motor, the both ends of ball mill main part outside are provided with support, and the ball mill main part rotation is arranged between the support, and the end of rear end support is installed with motor, and the motor is connected with the rear end of ball mill main part, and the outside of ball mill main part is provided with the outer sleeve shell, and the top of outer sleeve shell inside is provided with cooling assembly, and the inside of ball mill main part is provided with ball mill cavity, and ball mill cavity is obliquely arranged in the inside of ball mill main part, the utility model discloses the oblique design of ball mill cavity, cooperation ball mill main part rotation, let the grinding ball and glaze reciprocating roll in ball mill cavity. In the rolling process, the frequent and powerful collision, friction of both, greatly improve the grinding efficiency of glaze, can fast glaze processing to the fine degree that meets the process requirement, satisfies the efficient production demand.

The present application relates to the technical field of lithium ion batteries, in particular to a core-shell structure binder for lithium battery carbon-coated current collector, its preparation method and application, the present application takes polyacrylonitrile seed emulsion, passes into nitrogen, adds shell monomer pre-emulsion, potassium persulfate aqueous solution, warms, reacts, cools, adds anhydrous ethanol, centrifugal, removes impurities, dries, grinds, obtains core-shell structure binder. The compact, hydrophobic shell layer of the core-shell structure binder acts as a barrier to prevent oxygen and moisture in the air from entering the core layer, thereby protecting the cyano group of the polyacrylonitrile in the core layer; when the lithium battery carbon-coated current collector is coated with the positive electrode material, the N-methyl pyrrolidone in the positive electrode material can selectively permeate the shell layer and swell with the cyano group of the polyacrylonitrile in the core layer, thereby improving the interlayer adhesion between the carbon-coated layer and the positive electrode material through subsequent drying, and solving the problem of poor stability of traditional polyacrylonitrile-based binders.

The invention discloses a composite material with longitudinally distributed basalt fibers as well as a preparation method and application of the composite material. The composite material comprises at least one layer of base plate, wherein the base plate is formed by closely paving a plurality of prismatic unit bodies which are consistent in thickness and have regular polygonal cross sections; the unit bodies in the composite material are fixed into a whole through an adhesive; the unit body is composed of a plurality of basalt fibers which are longitudinally arranged; the fiber direction of the basalt fibers in the unit bodies is the same as the axis direction of the unit bodies and is perpendicular to the plate face of the base plate obtained by tiling the unit bodies. The core of the bulletproof armor plate is that the distribution direction of basalt fibers is changed from the radial direction to the axial direction, so that the problem that the radial pressure resistance is insufficient when traditional fibers are transversely distributed is solved, and the prepared bulletproof armor plate can convert impact force of bullets into pressure on the axial direction of the fibers; the extremely high axial compressive strength of the basalt fibers is fully utilized, so that the bulletproof efficiency is remarkably improved, and the light weight of the armor is achieved.

The invention discloses an anti-aging and anti-electromagnetic shielding cable and a preparation method thereof, and belongs to the field of high voltage and the technical field of materials, the anti-aging and anti-electromagnetic shielding cable structurally contains a polyurethane-polyethylene copolymer and a flame-retardant and anti-electromagnetic sheet composite carrier, contains a polyurethane chain segment which is connected with a polyethylene main chain through a covalent bond, has no interface separation risk, and has good anti-aging and anti-electromagnetic shielding effects. Polyethylene is resistant to acid, alkali and salt mist, a carbamate group in a polyurethane chain segment can capture free radicals generated by photooxidation and thermal oxidation of polyethylene, aging is delayed from the molecular level, and the flame-retardant anti-electromagnetic sheet composite carrier endows the cable with good aging resistance and anti-electromagnetic shielding characteristics; the lamellar structure of the sheet-shaped carrier can block heat transfer and combustible volatilization, and the lamellar structure and the sheet-shaped carrier synergistically improve the flame-retardant efficiency; the introduction of the flaky composite carrier not only endows functional characteristics, but also can be used as a rigid reinforcement phase, so that the wear resistance and the extrusion resistance of the cable are improved, and the loss of the cable in the dragging and construction processes is reduced.

The utility model discloses a prestressed hollow square pile reinforcing structure, include: pile body, reinforcing component, the reinforcing component includes upper reinforcing block, lower reinforcing block, reinforcing rib, support ring, hanging rod and positioning slot, upper reinforcing block distributes in the upper portion of the inner surface of pile body, and lower reinforcing block distributes in the lower portion of the inner surface of pile body, and support ring is fixedly connected between a plurality of upper reinforcing blocks and a plurality of lower reinforcing blocks respectively, and reinforcing rib is poured and is connected between a plurality of support rings, and hanging rod is fixed in the outer end of reinforcing rib. The utility model discloses being equipped with the reinforcing component, after upper reinforcing block, lower reinforcing block, reinforcing rib and support ring are installed in the inside of pile body, hanging rod is hung in the inside of positioning slot, and top ring is inlaid in the top and bottom of the inner surface of pile body and is clamped with the top of hanging rod through the clamping hole, pours and fills in the inside recess, makes top ring and upper reinforcing block, lower reinforcing block realize fusion between, forms integrated reinforcing structure, and the integrity of the inside of pile body is strengthened.

The invention belongs to the technical field of protein beverages, and particularly relates to a composite peptide beverage and a preparation process thereof. The active ingredients of the drink comprise calf thymosin, cattle spleen protein peptide, hemoglobin peptide, bone collagen peptide and collagen peptide in a weight ratio of (2-3): 1: 1: 1: 1. The pH value of the system is adjusted to 3.5-4.5, so that each peptide molecule is positively charged under the acidic condition, the electrostatic repulsion and hydration among molecules are enhanced, and bitter groups are effectively masked. The flavoring agent is compounded by DL-malic acid, crystalline fructose, xylitol and sucralose according to the weight ratio of (0.6-1): 1: 0.4: (0.03-0.04), and the sour and sweet taste and flavor coordination are synergistically improved. The preparation method comprises the following steps: dissolving the DL-malic acid in purified water, dissolving the uniformly mixed active components in purified water at 40-60 DEG C, respectively adding other flavoring agents, stabilizing agents and essence, and finally filtering to obtain the product. The problem of bad flavor of the peptide is solved, so that the beverage is appropriate in taste, harmonious in flavor and easy to accept.

The application discloses a microfluidic chip for preparing high-flux tumor organoids and a preparation method and application thereof. The microfluidic chip comprises a top layer and a matched bottom layer connected with the top layer; the top layer contains four hollow areas in the shape of right-angle sectors, and forms liquid storage areas after being connected with the bottom layer; four cell culture areas and four liquid exchange buffer areas are arranged in the areas of the bottom layer corresponding to the hollow areas of the top layer, and one cell culture area and one liquid exchange buffer area form a right-angle sector; the cell culture area is provided with a plurality of small chambers; and the liquid exchange buffer area is connected with the center. The microfluidic chip is provided with the liquid exchange buffer area, which greatly reduces the growth interference and loss of cells during liquid exchange, thereby being beneficial to the formation of uniform tumor organoids and keeping the tumor organoids in situ, facilitating continuous observation; and the top-open structure design is adopted, which is convenient for uniform implantation and dispersion of tumor cells and convenient for recovery of the tumor organoids.

The present application relates to the technical field of road engineering pavement materials, in particular to a composite asphalt regenerant, a preparation method, a use method and an application thereof.The regenerant comprises, by mass percentage, 30-70% of aromatic component oil, 15-50% of hydrogenated base oil, 5-10% of a curing accelerator, 3-10% of a low-temperature stabilizer, 0.5-3.0% of an antioxidant, 0.5-5.0% of a diluent and 1-5% of an ammonium ion stabilizer.The present application significantly reduces the viscosity of the regenerant through multi-component synergy, realizes normal-temperature construction in all seasons, effectively restores the penetration and softening point of aged asphalt, delays secondary aging through the synergy of the antioxidant and the ammonium ion stabilizer, and simultaneously enhances the low-temperature crack resistance and initial strength of the recycled mixture, and is suitable for plant-mixed hot recycling, in-place hot recycling and cold recycling processes.

This invention relates to the field of electronic packaging composite materials technology, and particularly to a thermally conductive epoxy encapsulation material, its preparation method, and its application. The invention uses Fe3O4 nanospheres and sodium polyacrylate solution as raw materials to prepare polyacrylic acid-modified Fe3O4 nanospheres; these are then blended with adipic acid and epoxy resin, and a thermally conductive epoxy encapsulation material is prepared through a curing reaction. The thermally conductive epoxy encapsulation material prepared by the method of this invention exhibits uniform dispersion of Fe3O4 nanospheres, good interfacial compatibility, and high thermal conductivity, demonstrating excellent thermal conductivity, interfacial reliability, and mechanical properties, making it well-suited for electronic chip packaging applications.

The utility model discloses an anti-collision paperboard structure and belongs to the technical field of paperboards. The supporting assembly comprises core paper, reinforcing ribs are bonded to the two sides of the core paper, two first clamping grooves are formed in the upper end and the lower end of the core paper, a row of first inserting grooves are formed in the two sides of the core paper, corrugated paper is bonded to the two sides of the core paper, and a fixing assembly is bonded to one side of the corrugated paper; the sides, close to the extending plates, of the two ends of the panel are provided with a row of second inserting grooves, the upper end and the lower end of the panel are each provided with two second clamping grooves, the upper end and the lower end of the panel adhere to a bottom plate, and clamping plates are arranged on the bottom faces of the bottom plates. Through cooperation of the supporting assembly, the fixing assembly and the inserting assembly, the supporting assembly, the corrugated paper and the fixing assembly are transversely connected into a whole, a multi-dimensional supporting network is formed, impact force can be evenly conducted and dispersed through the synergistic effect of the core paper, the reinforcing ribs, the corrugated paper, the fixing assembly and the inserting assembly, and the anti-collision performance of the paperboard in all directions is improved.

The present application relates to the technical field of medicine and chemical industry, in particular to a kind of alginate / nano lanthanum hydroxide composite microspheres and its preparation method and application.The composite microspheres use sodium alginate as organic matrix material, and nano lanthanum hydroxide as inorganic filling phase, which are prepared by electrospray technology, and can realize the uniform dispersion and wrapping of nano lanthanum hydroxide in alginate microspheres.The size of the composite microspheres can be adjusted as needed between 235.5 μm and 748.4 μm, and the mass ratio of alginate to nano lanthanum hydroxide can be adjusted as needed within 1: (0.5-1.5).The composite microspheres of the present application have a phosphorus binding capacity of 41.0 mg / g-90.0 mg / g in a gastric acid environment with pH=2, and excellent phosphorus binding ability, which can be used as an oral phosphorus binding agent for the treatment of hyperphosphatemia, providing a new technical solution for clinical intervention of hyperphosphatemia.

The invention relates to a targeted recovery method for residual ores in a covering layer of a caving method stope, which comprises the following steps: step 1, a residual ore area identification stage: combining an original ore body model, mining design data and ore removal grade records, and constructing a residual ore target area model through historical ore removal statistical data of each stage, the method comprises the following steps: (1) deducing a possible residual ore enrichment area, (2) a recovery engineering arrangement stage, (3) a target area flow regulation stage and (4) a dynamic ore drawing management stage. According to the technical scheme, accurate recognition and targeted recovery of the covering layer residual mine area are achieved through combination of ore drawing management and the bulk flow model, the loss rate is remarkably reduced, the quantity of extracted resources is increased, and economic benefits are improved.

The present application relates to a kind of bionic micro-nano layered Nb / Nb5Si3 Composite material and its preparation method.The bionic micro-nano layered Nb / Nb5Si3 Composite material includes Nb5Si3 Phase and lamellar Nb phase, wherein lamellar Nb phase is significantly parallel staggered arrangement, Nb phase layer thickness is 10~800nm, interval is 50~800nm.The preparation method of the composite material includes the following steps: a certain amount of raw material Nb powder is ball milled into Nb sheet under vacuum condition, then Nb sheet is vacuum dried, and small particle size nanometer Nb sheet is screened out;Raw material Si powder and screened small particle size nanometer Nb sheet are weighed according to proportion, ball milled together, uniformly mixed, vacuum dried to obtain composite powder;After the composite powder is loaded into graphite mold, the composite powder in graphite mold is treated by ultrasonic vibration or metal microsheet rapid directional paving, and composite powder with certain arrangement direction is obtained;The composite powder is together with graphite mold and is carried out vacuum discharge plasma sintering, and bionic micro-nano layered Nb / Nb5Si3 Composite material is prepared.

This invention provides a method and application for the controllable recovery of a specific cobalt-nickel ratio product from a cobalt-nickel mixed solution. The method includes the following steps: adding a complexing agent to the cobalt-nickel mixed solution and adjusting the pH of the solution to acidic, thus obtaining an electrolyte; using the electrolyte as the working electrolyte in an electrodeposition system, performing an electrodeposition reaction under constant potential conditions, causing the specific cobalt-nickel ratio product to deposit on the cathode surface; wherein the cobalt-nickel mixed solution contains cobalt ions and nickel ions. The recovery method of this invention is simple in procedure, reduces production costs, improves recovery efficiency and environmental friendliness, and has good prospects for industrial application.

The invention discloses an intelligent grass seed broadcast sowing device for collapsible loess slope vegetation restoration, and relates to the technical field of slope grass seed broadcast sowing, the intelligent grass seed broadcast sowing device comprises a mobile vehicle body for bearing the broadcast sowing device and moving along a slope protection square grid framework; the front mixed soil storage cavity is fixed at the top of the front end of the mobile vehicle body; the rear mixing soil storage cavity is fixed at the top of the rear end of the mobile vehicle body; the grass seed conveying cavity is fixed to the top of the movable vehicle body and located between the front mixed soil storage cavity and the rear mixed soil storage cavity; the front soil covering device is fixed at the front end of the mobile vehicle body and is connected with the front mixed soil storage cavity through a spiral conveying pipe; the rear soil covering device is fixed at the rear end of the mobile vehicle body and corresponds to the rear mixed soil storage cavity; the sowing device is fixed in the center of the bottom of the movable vehicle body, and the top is connected with the grass seed conveying cavity. According to the invention, uniform sowing of grass seeds in the grid area and uniform and dense soil covering layers are realized, and the sowing efficiency, the grass seed utilization rate and the slope consolidation stability are obviously improved.

This invention discloses a magnesium-lithium alloy thin-walled cabin shell and its preparation method, belonging to the technical field of magnesium-lithium alloy structural components. The method includes the following steps: S1. After homogenization treatment at 300-380℃ for 6-12 hours, a magnesium-lithium alloy ingot is forged into a thick-walled cylindrical billet using a die forging process. The die forging temperature is 280-350℃, and the forging reduction rate is 40-60%. S2. After preheating the billet, it is then spun into a rough blank. The spinning process is completed in 4-5 passes, with a total reduction of 60-75%. The workpiece temperature is maintained at 150-250℃ during the spinning process. A rough blank is obtained after spinning. S3. The rough blank is demolded and then subjected to aging treatment at 300-360℃ for 3-6 hours, followed by furnace cooling to room temperature. Finally, the rough blank is precision machined to obtain the magnesium-lithium alloy thin-walled cabin shell. The preparation method of this invention has a high forming rate, and the magnesium-lithium alloy thin-walled cabin shell possesses excellent mechanical properties and a high yield.

The invention relates to lycopene water dispersible powder and a preparation method thereof, and belongs to the technical field of food additives. The method comprises the following steps: esterifying octadecyl alcohol and food-grade phosphoric acid, and reacting with edible gelatin to prepare modified edible gelatin; then lycopene dry powder is dispersed in ethyl acetate, a compound emulsifier, modified edible gelatin and 1, 3-propylene glycol are added, and preliminary embedding is achieved through high-speed shearing and ultrasonic nanocrystallization treatment; and step-by-step vacuum drying, secondary embedding with an excipient, freezing, crushing and screening are carried out, such that the water dispersible powder with a particle size of 0.1-0.2 mm is prepared. Through the hydrophobic binding and charge repulsion effects of the modified gelatin and the synergistic process of ultrasonic nanocrystallization and double embedding, the technical problems that traditional lycopene is poor in water dispersibility, prone to layering, high in solvent residue and insufficient in stability are solved. The prepared product is suitable for healthy food systems such as water-based food, beverage and the like, and has the advantages of convenience in storage and transportation and high bioavailability.

The utility model discloses an automatic compound fertilizer mixing device, which belongs to the technical field of automatic mixing devices and comprises a mixing tank, a driving component is mounted at the top of the mixing tank, a first feed hopper is connected to one side, close to the top of the driving component, of the mixing tank, and a second feed hopper is further arranged on one side, far away from the top of the first feed hopper, of the mixing tank. A supporting base is installed at the bottom of the material mixing tank, a discharging port is formed in one side of the material mixing tank, two sets of feeding ports are formed in the top of the material mixing tank, and wedge-shaped clamping grooves are formed in the peripheries of openings of the two sets of feeding ports correspondingly. According to the invention, a chemical fertilizer with a second element can be automatically discharged, and meanwhile, the discharged chemical fertilizer with the second element and the chemical fertilizer with the first element can be mixed and stirred, so that the mixing and stirring uniformity of two or more fertilizers can be effectively improved; and the problem of local aggregation of the single-element fertilizer caused by a direct feeding mode is avoided.

This invention belongs to the field of pest control and biomaterial application technology, specifically relating to a termite bait based on cellulose waste and its high-temperature, high-pressure preparation process and application. The bait uses sugarcane bagasse powder and bark powder as the main cellulose matrix, supplemented with glucose, xylose, casein, and granulated sugar as attractants, and incorporates a chitosan-graphene oxide composite nano-insecticide. This bait exhibits high stability in humid environments, is not prone to mold, and maintains its attractant properties and efficacy for a long period. Indoor and buried tests have verified that the prepared bait significantly increases the termite feeding rate and mortality rate compared to the control group, demonstrating a comprehensive advantage of strong attractant properties, slow-release effect, and environmental friendliness.

The invention relates to a fluorinated modified MXene-based conductive composite material and a preparation method thereof, and belongs to the technical field of composite materials, Ti3AlC2 is subjected to fluorinated etching, a fluorine group is introduced, Ni < 2 + >, Co < 2 + > and La < 3 + > react with S < 2 > generated by disproportionation reaction of sulfur powder under a hydrothermal condition to generate metal sulfide nanocrystals, the metal sulfide nanocrystals are anchored on the surface of fluorinated MXene powder, and the fluorinated modified MXene-based conductive composite material is obtained. Meanwhile, ammonium fluoride supplements fluorine ions to further regulate and control surface groups, melamine is induced to form a titanium vacancy defect in subsequent heat treatment, active sites are enriched, an electron transmission path is optimized, nitrogen doping and heat treatment of dopamine form a nitrogen-doped carbon layer, a three-dimensional conductive network is constructed, the interface bonding force is enhanced, and the conductivity of the electrode is improved. In-situ generation of ZnIn2S4 and interlayer insertion of graphene oxide increase additional active sites and effectively inhibit agglomeration, so that the specific capacitance and cycling stability of the fluorinated modified MXene-based conductive composite material are synergistically improved.

The utility model provides a titanium concentrate screening device relates to titanium concentrate screening technical field, include: the casing, the inside of casing is provided with a plurality of from top to bottom aperture gradually decreases and sets down the screening net of inclination, the casing side wall and the position department of screening net corresponding place is provided with the discharge gate, the casing top is provided with the feeding cylinder, the feeding cylinder top center position department is provided with the feeding hopper, the inside of feeding cylinder is provided with the fixed disc, the fixed disc top is provided with a plurality of through's blanking hole, every screening net top all is equipped with the guide vane in the inside of casing and is used for guiding the titanium concentrate to the guide vane high end of screening net, the bottom of the guide vane in the uppermost position is provided with the drive motor, is provided with the stirring assembly who is used for stirring the titanium concentrate on the top of fixed disc to the blanking hole department on the output shaft of drive motor and sets through the fixed disc, the stirring assembly top is provided with the conical plate. The utility model discloses reasonable structure, the distribution is even, and the effect is good, and the screening quality is high.

The utility model discloses a multifunctional screw extruder which comprises an extruder shell, an extrusion piece is arranged on the right side of the extruder shell, a motor is arranged on the left side of the extruder shell, and raw materials in a feeding bin can be effectively mixed through movement of a stirring shaft and a stirring rod; the temperature controller can accurately monitor and control the temperature of the heating rod, it is ensured that the evenly-mixed raw materials can be heated within a proper temperature range, the influence of overheating or supercooling on the product quality is avoided, the heat preservation plate can provide an additional heat insulation layer, heat dissipation is helped to be prevented, the temperature of the heating plate is more stable, and the service life of the heating plate is prolonged. Meanwhile, the internal temperature of the device is prevented from affecting operation of the motor and the gear, the handheld piece at the top of the heating rod can facilitate detection and maintenance of the device by operators, operation safety is improved, downtime is shortened, heating position adjustment is facilitated, production efficiency and quality are improved, the maintenance process is simplified, and maintenance cost is reduced.

The application relates to the technical field of performance regulation of recycled concrete, and relates to a recycled concrete performance regulation method and system based on aggregate gradation optimization, which comprises the following steps: confirming a recycled concrete performance regulation environment based on a recycled concrete performance regulation instruction, pretreating engineering slag soil by using an aggregate pretreatment unit, grading the coarse aggregate sand and the fine aggregate sand based on an aggregate gradation optimization unit, pouring recycled lightweight aggregate concrete mixture by using a curing control unit, detecting the compressive strength, apparent density and thermal conductivity of the recycled concrete test piece by using a performance evaluation and regulation unit, and comparing and analyzing the actually measured performance index set with the preset target performance index set, so that the recycled concrete performance regulation of the engineering slag soil is realized based on the regulated recycled concrete. The application can improve the accuracy, efficiency, resource utilization rate and engineering applicability of the recycled concrete performance regulation.

This invention relates to the field of coating technology and discloses an automotive wear-resistant coating and its preparation method. The invention involves adding an aqueous polyurethane dispersion, carboxylated nitrile rubber-modified montmorillonite, colorant, defoamer, and leveling agent to a shear mill, followed by shear dispersion to obtain the wear-resistant coating. The carboxylated nitrile rubber is chemically crosslinked and modified onto the surface of montmorillonite using a cationic crosslinking agent, forming a composite reinforcement. The crosslinking agent contains ester and amide groups, exhibiting strong affinity for the amide groups of polyurethane, thus improving the compatibility between the carboxylated nitrile rubber-modified montmorillonite and polyurethane. This ensures uniform dispersion within the coating matrix, enhancing the wear resistance and scratch resistance of the coating film, while also providing excellent impact resistance and flexibility. This method has promising practical applications in automotive coatings.

The utility model relates to the technical field of dust removal of processing workshops, and discloses a bag-type dust remover for an equipment processing workshop, which comprises a dust removal box, an annular groove is arranged on the inner side of the dust removal box, a bearing plate is slidably mounted on the inner side of the annular groove, and a fixed plate is fixedly sleeved on the inner wall of the dust removal box and is flush with the bottom side surface of the annular groove. Compared with a traditional device, when the dust discharging mechanism sprays dust-containing gas into the dust removal box, dust-containing particles are adsorbed on the outer surface of the dust removal cloth bag to increase the weight of the dust removal cloth bag, elastic deformation of the spring is triggered to drive the bearing plate to sink, the controller is triggered to start the gas spraying mechanism, and the gas is conveyed to the first connecting pipe through the conveying pipe and the annular communicating pipe; according to the design, the mechanical linkage and elasticity principle is ingeniously utilized, precise automatic control is achieved, dust removal is efficient, stable operation of equipment is guaranteed, and manual intervention is reduced.

This utility model provides a sheet metal packaging device, relating to the field of sheet metal packaging. It includes a box body with an internal space for accommodating sheet metal; a first limiting component located at the bottom of the accommodating space for limiting the bottom of the sheet metal; a second limiting component including multiple second limiting blocks spaced at intervals along the length of the sheet metal at the top of the accommodating space for limiting the top of the sheet metal; and an anti-jump filling plate disposed between the second limiting blocks and the top wall of the box body, with the lower surface of the anti-jump filling plate abutting against the second limiting blocks and the top surface of the sheet metal, and the upper surface of the anti-jump filling plate abutting against the top wall of the box body. This utility model achieves stable positioning of the sheet metal within the box body, reduces the contact area between the sheet metal and the inner wall of the box body, solves the problem of sheet metal deformation due to impact in existing packaging methods, and effectively maintains the processing accuracy of the sheet metal.

The invention discloses a supported nickel catalyst for preparing 1, 3-propylene glycol by hydrogenation of a 3-hydroxypropionaldehyde fixed bed, and a preparation method and application thereof, and relates to the technical field of catalysts. The catalyst provided by the invention takes a carrier with a large specific surface area and a large aperture as a matrix, and an active component nickel is uniformly loaded to the surface of the carrier in a highly dispersed manner by adopting a precipitation-deposition method; in the catalyst forming stage, a neutral or alkaline binder is selected, so that a pre-roasting step of a precipitation product is avoided, and the finally prepared catalyst not only has higher hydrogenation activity, but also has a certain cost advantage. The supported nickel catalyst prepared by the invention has high catalytic activity and selectivity in the process of preparing 1, 3-propylene glycol by hydrogenation of a 3-hydroxypropionaldehyde fixed bed, and is suitable for industrial continuous production of 1, 3-propylene glycol.

When the circular water circulation heat pump water heater wall hanging support is installed, the installation hanging plate is firstly fixed on a wall surface, then the insertion holes in the main body frame are inserted into the insertion plates on the installation hanging plate, and therefore the main body frame is stably fixed. A VE-type rubber hanging plate supporting leg is arranged at the position of an opening, where a welding nut is arranged, of one side, close to the wall body, of the back plate assembly, and damage of the support to the wall body in the using process is effectively prevented. And then, the main body frame provides mounting support for the circular water circulation heat pump water heater through the VD type rubber shock absorber, the VD type rubber shock absorber can effectively absorb mechanical vibration generated during operation of the water heater and reduce vibration transmitted to a wall or other structures, and therefore noise is reduced, and it is ensured that the water heater keeps low noise and operates stably during operation. Meanwhile, the decorative coaming and the back plate assembly jointly form a complete circular supporting structure, the water heater body is comprehensively surrounded, it is ensured that the weight of the water heater is evenly distributed, and the situation of uneven stress is avoided.