322results about How to "Improve compaction" patented technology

The invention provides an anion-cation co-doped modified lithium manganese phosphate positive electrode material and a preparation method thereof, the lithium manganese phosphate positive electrode material comprises anion-cation doped lithium manganese phosphate and a carbon layer, the carbon layer is coated on the surface of the anion-cation doped lithium manganese phosphate, the chemical general formula is LiMn < 0.6 > Fe < 0.4-x > M < x > PO < 4-y > Fy, 0.001 < = x < = 0.03, 0.01 < = y < = 0.5, and 0 < = y < = 0.5. M is a cation, and Y is a fluorine ion. According to the preparation method, carbon layer coating and anion and cation co-doping modification of the lithium manganese iron phosphate positive electrode material are simultaneously realized through a one-step hydrothermal method, and the prepared lithium manganese iron phosphate positive electrode material is in an irregular spherical shape, relatively smooth in particle surface, and relatively high in large and small particle grading and compaction; after a performance test, compared with an electrode material which is not doped with anions and cations, the material disclosed by the invention has the advantages that the stability and the discharge capacity of the material are remarkably improved, and the electrochemical performance of the lithium manganese iron phosphate positive electrode material is effectively improved.

The invention relates to the technical field of sodium ion battery positive electrode materials, in particular to a carbon-coated sodium ferric phosphate pyrophosphate positive electrode material and a preparation method and application thereof.The preparation method includes the steps that carbon nanotubes and an organic carbon source serve as carbon sources to prepare two kinds of sodium ferric phosphate pyrophosphate particles, and the two kinds of particles are mixed in proportion and then sintered to obtain the carbon-coated sodium ferric phosphate pyrophosphate positive electrode material. In the carbon layer coated on the surface of the material, the carbon nanotubes and the organic carbon source exert respective conductive advantages to form a strong conductive network, so that the conductivity of the material is improved, and the overall structural rigidity of the material is enhanced.

The invention discloses a ferric sodium pyrophosphate positive electrode material, a preparation method thereof and a battery, and relates to the technical field of batteries. Pre-sintering is performed; sanding and spray drying; and high-temperature sintering. Wherein the pH value of the reaction is controlled by using a Tris-HCl buffer solution in the hydrothermal reaction, so that the precursor is uniformly crystallized and has high crystallinity, and low-temperature segmented presintering is adopted later, so that the compaction density of the material can be controlled, and the related electrical properties of the material are relatively good. In the preparation process, a carbon source and a doping element are supplemented twice, so that carbon coating is uniform in the sintering process, the compaction density of the NFPP positive electrode material is further improved, the properties such as theoretical specific capacity of the positive electrode material are better through doping and carbon coating modification, and the high-compaction and high-capacity ferric sodium pyrophosphate positive electrode material is obtained.

The invention provides a sodium ferric phosphate pyrophosphate composite material, a preparation method and application thereof, and a sodium ion battery, and relates to the technical field of positive electrode materials, the preparation method comprises the following steps: carrying out solid phase mixing on carbon-coated sodium ferric phosphate pyrophosphate and an organic carbon source, and then carrying out sintering treatment to obtain the sodium ferric phosphate pyrophosphate composite material; the temperature of the sintering treatment is 400-580 DEG C. The technical problems that in the prior art, according to a carbon source coating method, carbon source coating is not uniform, the porosity between materials is difficult to effectively reduce, the compaction performance of the materials cannot be remarkably improved, and the crystal structure of the materials is prone to change are solved, and the purposes of reducing the powder resistance of the materials and improving the compaction performance of the materials are achieved. The carbon coating uniformity is effectively improved, the porosity of the material is effectively reduced, the compaction performance of the material is remarkably improved, the water absorption of the material is reduced, and the crystal structure of the material is improved, so that the technical effect of comprehensively improving the performance of the material is achieved.

The invention provides a lithium manganese iron phosphate material and a preparation method and application thereof.The preparation method comprises the steps that firstly, an iron source, a manganese source, a phosphorus source and a fluorine source are mixed and react to prepare a manganese iron phosphate precursor; and then preparing the lithium manganese iron phosphate material through double-step compounding of a carbon source and operations such as multiple times of grinding and sintering of an intermediate mixed material in the preparation process. According to the preparation method, firstly, a fluorine source is added into a ferromanganese phosphate precursor, and then substances such as a lithium source are added into the prepared ferromanganese phosphate precursor, so that the obtained lithium ferromanganese phosphate material can give full play to the current transmission effect of lithium in the material on the basis of inheriting the performance of the ferromanganese phosphate precursor material. The compaction performance and the cycle performance of the lithium manganese iron phosphate material are further improved through double-step carbon source compounding and repeated grinding, sintering and other operations of an intermediate mixture in the preparation process. In addition, the preparation method is simple in process and convenient to operate, and the obtained composite material is stable in performance and high in repeatability.

The invention relates to a graphite negative electrode material and a preparation method thereof, a negative electrode plate and an electrochemical device. The graphite negative electrode material comprises secondary particles formed by granulating and carbonizing 20%-90% of a doped porous graphite precursor, 5%-30% of hard carbon particles and 5%-50% of a coating agent, in the secondary particles, the hard carbon particles are at least partially filled in holes of the doped porous graphite precursor, and the coating agent is at least partially filled in the holes of the doped porous graphite precursor. And after the coating agent is carbonized, at least part of the coating agent forms amorphous carbon to coat the outer layer of the doped porous graphite precursor. According to the scheme provided by the invention, the doped porous graphite precursor can be compounded with the hard carbon particles and the coating agent to obtain the graphite negative electrode material with high capacity and fast charging performance.

The invention discloses a solid electrolyte coated porous microcrystalline graphite composite material, a composite negative electrode and a preparation method and application of the composite negative electrode. The solid electrolyte coated porous microcrystalline graphite composite material comprises porous microcrystalline graphite with a porous structure; the particle size compounded inorganic solid electrolyte comprises a gathering part filled in a porous structure, and coating parts distributed among particles of porous microcrystalline graphite and on the surface of the porous microcrystalline graphite. The composite negative electrode comprises a current collector, a solid electrolyte coated porous microcrystalline graphite composite material arranged on the surface of the current collector and metal compounded on the surface of the composite material. The surface of the porous microcrystalline graphite is coated with the compounded solid electrolyte with different particle sizes, so that the ionic conductivity of the material can be greatly improved, and uniform deposition and dissolution of metal are facilitated; and the prepared composite negative electrode has lower expansion, the porous microcrystalline graphite can contribute higher reversible capacity, and the composite negative electrode has the advantages of high capacity and high compaction.

The invention relates to the technical field of non-road mobile mechanical dynamics models, in particular to a method for establishing a digital model of a vibration system of a road roller. The method comprises the following steps: acquiring an initial pavement material vibration characteristic data set; performing multi-physical field coupling analysis on the initial pavement material vibration characteristic data set to obtain pavement material response characteristic data; performing dynamic system modeling on the vibration system of the road roller based on the pavement material response characteristic data to obtain an initial digital model of the vibration system; performing dynamic feature extraction on the initial digital model of the vibration system to obtain dynamic parameter mapping data of the vibration system; and performing parameter calibration on the initial digital model of the vibration system based on the dynamic parameter mapping data of the vibration system to obtain a digital model of the vibration system. The intelligent vibration system model can accurately capture the dynamic characteristics of soil, and the optimal compaction effect is achieved.

The invention relates to the technical field of road construction, and particularly discloses a cooperative construction management method for a highway pavement intelligent spreading and pressing machine group, and the method comprises the steps: S1, collecting road data through an unmanned aerial vehicle, automatically building a construction model through one-key operation according to the data, and determining a spreading route, by combining the road paving information data, the environment data and the paving material temperature, the overall compaction operation environment of the road roller can be analyzed and fed back to different areas in different lines; then, the data processing module can adjust the moving speed of the road roller according to the compaction operation environment in different areas in different lines, so that the speed of the road roller is more adaptive to the compaction operation environment in the current area, the speed of the road roller is accurately controlled, and the situation that the compaction effect is poor due to too high or too low speed is avoided; and therefore, the compaction effect and the working efficiency are improved.

The invention provides a starch-based hard carbon negative electrode material, a preparation method thereof and a sodium ion battery, and belongs to the technical field of battery materials. The starch-based hard carbon negative electrode material comprises single crystal particles, the single crystal particles comprise polygonal particles with angular morphology, and the angular degree is 90-130 degrees. The single crystal particles in the starch-based hard carbon negative electrode material provided by the invention are regular in morphology and have a corner angle morphology with a specific angle, the phenomenon of particle aggregation and fusion can be avoided, the physicochemical properties of the starch-based hard carbon negative electrode material are remarkably improved, the particle size distribution is uniform, the compaction is improved, and meanwhile, the sodium storage sites are also increased; the sodium storage capacity and the first effect are favorably improved.

The invention particularly relates to plate extrusion equipment and a using method thereof.The plate extrusion equipment comprises a plate discharging composite machine head, a plurality of feeding ends arranged on one side of the plate discharging composite machine head and a plurality of thermoplastic extruders correspondingly connected with the feeding ends of the plate discharging composite machine head, and the plate discharging composite machine head and the four thermoplastic extruders matched with the plate discharging composite machine head work cooperatively; according to the utility model, materials from different thermoplastic extruders can be layered, pressurized and conveyed through the four conical pressurizing ports, so that multiple layers of materials can be synchronously and accurately compounded in the plate outlet groove, the tight combination between layers is ensured, and the structural stability of the composite plate is improved; wherein the design of horizontal communication between the horizontal plate cavity and the plate outlet groove ensures the stable transition of the composite material in the extrusion molding process, avoids the common problem of unstable extrusion or fault in the traditional equipment, and is combined with the use of the cooler, so that the composite plate can be quickly cooled and molded after being extruded, the production efficiency is improved, and the production cost is reduced. And the size accuracy and the surface quality of the plate are ensured.

The invention provides a special fertilizer for highland barley in Tibet high-altitude areas, which specifically comprises a matrix, a base fertilizer, an organic fertilizer, a trace element fertilizer, a modifier and a nutritional agent in a mass ratio of 100: 50: 100: 1: 15: 3, the substrate comprises loam, river sand and bentonite; the base fertilizer comprises nitrogenous fertilizer, phosphatic fertilizer and potash fertilizer; the organic fertilizer comprises bran, decomposed straw, decomposed excrement, plant ash and aquatic animal powder; the modifier comprises wormcast, silkworm excrement, perlite and vermiculite; the nutritional agent comprises compound vitamins, glucose, honey and compound amino acids; the raw materials used in the method are green, safe and pollution-free, the soil structure is improved while nutrient substances needed by highland barley growth are provided, the bran, the straw, the decomposed excrement and other agricultural wastes are used, cost is saved, efficiency is improved, and the utilization rate of resources is increased.

The embodiment of the invention provides a lithium iron manganese phosphate positive electrode material and a preparation method thereof, a positive electrode plate and a lithium ion battery, the preparation method comprises the following steps: dispersing a lithium source and a phosphorus source in a dispersant, then adding a manganese source and lithium iron phosphate to form a uniform mixed slurry, the proportion of a solid substance is greater than or equal to 45%, and the dispersant comprises ethylene glycol and / or water; placing the mixed slurry in a closed device, and carrying out a synthetic reaction under a certain condition to obtain a lithium manganese iron phosphate precursor; and carrying out high-temperature sintering on the lithium manganese iron phosphate precursor to obtain the lithium manganese iron phosphate positive electrode material. According to the preparation method of the lithium iron manganese phosphate positive electrode material provided by the embodiment of the invention, lithium iron phosphate is adopted as a template, the lithium iron manganese phosphate positive electrode material with high compaction and high performance is synthesized, no waste material or waste gas is generated, and the method is green and environment-friendly; the dispersing agent is small in usage amount and simple and efficient in process; the reaction atom utilization rate is high, the dispersant can be recycled, and the cost can be reduced; the method can be used for recycling the LiFePO4 material, and the additional value of the LiFePO4 material

The invention discloses a micro-pressure tap density tester which comprises a micro-pressure tap density testing measuring cylinder and a vibration device, the micro-pressure tap density testing measuring cylinder comprises a measuring cylinder main body and a piston type flattening block which is arranged in the measuring cylinder main body and is used for flattening powder in the measuring cylinder main body; the piston type flattening block comprises a flattening body, a sealing ring, a filtering assembly and a balancing weight, and the sealing ring is arranged on the outer side of the flattening body; the flattening body is provided with an air hole penetrating through the surface and the bottom face of the flattening body, and the filtering assembly is arranged at an inlet or an outlet of the air hole. The balancing weight is borne on the surface of the flattening body; and the vibrating device is used for compacting the powder in the micro-pressure tap density testing measuring cylinder. The problem that the surface of the compacted powder is uneven can be solved, and test data are more accurate. In addition, the invention further discloses a micro-pressure tap density testing method.

The invention discloses a rock-soil seepage experiment device, and relates to the technical field of rock-soil seepage experiments, the rock-soil seepage experiment device comprises a test board, the test board is provided with a material storage box, a pressing plate is arranged above the material storage box, one side of the pressing plate is provided with a compaction assembly, the surface of the test board is provided with a transverse groove and a vertical groove, and the vertical groove is communicated with the transverse groove. According to the rock-soil seepage experiment device, the adjusting motor drives the threaded rod and the compaction plate to move up and down, the initial height of the compaction plate and the storage box can be accurately adjusted, so that personalized compaction treatment can be performed on rock-soil of different types and humidity, the adjustability ensures that the compaction strength is not excessive or insufficient, and the compaction efficiency is improved. The flexibility and the accuracy of the experiment are improved; the compaction treatment ensures that the density and the compactness of the rock soil to be measured in the experiment process are kept consistent, and experiment errors caused by rock soil looseness or uneven density are remarkably reduced, so that the experiment can more accurately simulate actual geological conditions, and the reliability and the accuracy of experiment data are improved.

The utility model discloses a multifunctional film-mulching seeding machine, belongs to the technical field of seeding machines, solves the problem that the existing seeding machine cannot complete all cultivation operations of seed seeding, and adopts the technical scheme that the multifunctional film-mulching seeding machine comprises a rack, the rack is provided with a pesticide spraying device, a rotary cultivator device, a ridging device, a seed rope seeding device, a fertilizing device, a drip irrigation tape laying device, a film laying device and an earthing device, the pesticide spraying device comprises a pesticide storage barrel and a pesticide spraying rod, the rotary cultivator device comprises a rotary tillage blade, and the seed rope seeding device comprises a seed rope disc, a seeding pipe and a seeding wheel. The fertilizing device comprises a fertilizer box, a fertilizer discharging box, a connecting pipe and a fertilizing shovel, the drip irrigation tape laying device comprises a storage disc and a laying wheel, the film laying device comprises a film erecting rod and a film spreading roller, the soil covering device comprises a soil covering roller and a soil covering disc, and a notch is formed in the surface of the soil covering roller. The seeder disclosed by the utility model can automatically finish all cultivation operations required by seed sowing.

The utility model relates to the technical field of road administration equipment, and discloses an asphalt pavement repairing device which comprises a tractor body, a stirring groove is formed in one side of the top of the tractor body, a stirring paddle is arranged at the center position in the stirring groove, and two heaters are fixedly installed on the other side of the inner bottom wall of the stirring groove in a front-back symmetry mode. A power box is arranged in the middle of the other side of the top of the tractor body, a driving shaft is arranged on one side of the bottom of the power box, and stirring paddles are fixedly connected to the bottom end of the driving shaft. The side-by-side double-compression-roller mechanism is arranged at intervals, namely, the groove is formed in the bottom of the other side of the traction vehicle body, the fixing frames are fixedly connected to the front end and the rear end of the inner top wall of the groove, and the two compression rollers are rotationally installed between the two fixing frames side by side at intervals; after the two compression rollers extrude the damaged asphalt surface of the crack poured with the asphalt mixture twice, the good compaction effect of the asphalt mixture in the crack of the damaged asphalt pavement can be achieved.

The invention relates to the technical field of highway soft foundation construction, in particular to a highway soft foundation light material filling and compacting device. According to the technical scheme, the light material filling and compacting device for the road soft foundation comprises a pressure bearing box, a center control box, a material storage box, a road rolling roller, a stretching assembly, a hammering assembly and an impurity removing and counting assembly; the hammering assembly is arranged at the end, away from the pressure bearing box, of the stretching assembly and can be used for hammering and compacting the ground, the impurity removing and counting assembly is correspondingly arranged on the road rolling roller, the rolling rotation condition can be detected, and it is guaranteed that the overall compacting stability follows the rolling principle of light first and then heavy, static first and then vibration, slow first and then fast first; and it is ensured that the material gradually reaches a dense state in the compaction process.

The invention relates to a road engineering roadbed and pavement compactness detection device, and belongs to the technical field of road infrastructure construction. The vibrating wheel is rotationally arranged on the rack, and a rotating shaft of the vibrating wheel is horizontally arranged; the engine is fixedly arranged on the rack and used for providing power for rotation of the vibrating wheel; the first eccentric assembly is arranged in the vibrating wheel and used for generating eccentric force; the first linkage assembly is arranged in the vibrating wheel and used for forming synchronous rotation between the first eccentric rod and a rotating shaft of the vibrating wheel; the compaction degree sensor is fixed on the rack and is positioned close to the center line of the vibrating wheel; an information collecting device and a displayer are fixed to the rack, the information collecting device is used for being matched with the compaction degree sensor to collect information, the displayer is used for being matched with the information collecting device to display the information, and the roadbed compaction degree detection device has the effect of fully detecting the compaction degree of a roadbed.

The invention belongs to the technical field of lithium ion battery negative electrode materials, and particularly relates to a high-temperature self-healing composite silicon carbon electrode and a preparation method thereof.The high-temperature self-healing composite silicon carbon electrode comprises a copper foil, the two faces of the copper foil are coated with negative electrode active layers, and liquid metal layers are applied to the negative electrode active layers through supersonic spraying; the liquid metal is condensed and rolled in a gap of the negative electrode active layer; the negative electrode active layer is prepared by coating negative electrode slurry, the negative electrode slurry is prepared by mixing small-particle-size graphite, graphite, a silicon material, a binder and deionized water, the mass ratio of the small-particle-size graphite to the graphite to the silicon material is (0.5-1): (1.5-3): (6-8), and the viscosity of the negative electrode slurry is 3000-6000 mPa.s. Graphite with different particle sizes and a silicon material are used as negative electrode active substances for mixing, so that the compaction of an electrode material is effectively improved, the specific surface area of an electrode is reduced, and the first coulombic efficiency of a negative plate is facilitated.

The invention discloses a lithium battery positive plate as well as a preparation method and application thereof, and belongs to the technical field of lithium batteries. The positive electrode comprises a current collector and a positive electrode multi-layer structure attached to the current collector, the anode multilayer structure sequentially comprises a lithium manganese iron phosphate layer, a polycrystalline ternary material doped lithium manganese iron phosphate layer and a lithium manganate layer from top to bottom, and the lithium manganate layer is attached to the surface of the current collector; and the polycrystalline ternary material is nickel cobalt lithium manganate. The polycrystalline ternary material is compounded with the nano lithium manganese iron phosphate, and the nano lithium manganese iron phosphate particles are relatively fine and can be filled in gaps between the ternary positive electrode active material and the lithium manganate positive electrode material, so that the compaction density of the composite material and the contact between the particles are improved, and the internal resistance of a pole piece is reduced. And the active substance with a multi-layer structure improves the rate charging and rate discharging capabilities of the battery, and improves the safety performance and low temperature resistance of the battery.

The invention discloses a cotton feeding and packaging control method and system and a cotton picking and packaging machine, which are characterized in that naturally stacked cotton above an auger group is firstly pre-compressed and then compressed into a cotton bale on the basis, so that the uniform compaction degree of the cotton is improved, the cotton storage amount above the auger group is kept at a preset reference stock position in the pre-compaction process, and the cotton bale is prevented from being damaged. And the continuity of the pre-compaction operation is ensured. And the auger group can well support the harvested cotton, so that the condition that the cotton on one side of the bottom of the cotton collecting box is too much is prevented, and special-shaped cotton bales are prevented from occurring during packaging. And then the torque of the auger motor is detected in real time, the start-stop state of the auger motor and the rotating speed of each execution motor in the feeding and packaging system are controlled according to the torque detection result to carry out feeding and packaging operation, the cotton compaction density is conveniently adjusted, and it is ensured that cotton is uniformly compacted during packaging. And when it is detected that the size of the cotton bale reaches a preset value, a packer motor is controlled to operate at the maximum rotating speed, and film wrapping and bale-by-bale operation are completed at the fastest speed.

The invention relates to a composite positive electrode material, a positive electrode plate and a battery. The composite positive electrode material comprises a lithium manganate material and a lithium-rich sodium-rich manganese-based material, and the median particle size of the lithium manganate material is greater than that of the lithium-rich sodium-rich manganese-based material; the compaction density PD of the composite positive electrode material meets 1.05 * (X1 * PD1 + X2 * PD2) lt; pDlt; 1.2 * (X1 * PD1 + X2 * PD2), and PDgt; x1 represents the mass fraction of the lithium manganate material in the composite positive electrode material, X1 is larger than or equal to 50% and smaller than or equal to 90%, PD1 represents the compaction density of the lithium manganate material, X2 represents the mass fraction of the lithium-rich sodium-rich manganese-based material in the composite positive electrode material, X2 is larger than or equal to 10% and smaller than or equal to 50%, PD2 represents the compaction density of the lithium-rich sodium-rich manganese-based material, and max represents the maximum value of PD1 and PD2. The composite positive electrode material disclosed by the invention is lower in cost and excellent in cycle performance, and can remarkably improve the electrical performance when being applied to a battery.

The invention discloses a coarse-grained soil slump detection device and method, and belongs to the technical field of detection devices.The coarse-grained soil slump detection device comprises a supporting seat, a slump barrel is movably placed in the middle of the supporting seat, a movable scraping barrel is mounted at the top of the slump barrel through a scraping mechanism, and an outer threaded barrel is fixedly connected to the inner top of a transverse plate; the outer threaded cylinder is sleeved with an inner threaded cylinder in a threaded mode, the inner threaded cylinder can drive a first pressing plate and a second pressing plate to rotate and move up and down, the second pressing plate can drive a rotating cylinder to rotate, the rotating cylinder can drive a sliding plate to move, and a graduated scale is fixedly installed at the top of the supporting base. Through cooperation of the compaction mechanism and the slicking mechanism, after coarse-grained soil is driven to be filled and compacted, the movable scraping cylinder can be driven to scrape off materials left on the top of the slump cylinder, and the technical effects that automatic scraping operation is achieved, time and labor are saved, the working time is saved, and the detection working efficiency is effectively improved are achieved.

The invention discloses a high-tap-density iron phosphate battery precursor which is prepared by the following steps: dispersing a basic ammonium iron phosphate filter cake into an acid solution with the pH value of 0.4-0.6, stirring until the filter cake is completely dissolved, adding an alkali solution to adjust the pH value of a base solution to 0.8-1.2, and adding polyethylene glycol for reaction; after the reaction is finished, alkali liquor continues to be added into the solution to adjust the pH value to 1.8-2.2, the temperature is increased to the aging temperature, iron phosphate dihydrate slurry is prepared, and finally the anhydrous iron phosphate with the high tap density is prepared after suction filtration, water washing, drying and calcination are conducted. According to the iron phosphate battery precursor disclosed by the invention, basic ammonium iron phosphate is firstly subjected to acid leaching and then subjected to recombination crystallization during preparation, the pH value of a system is adjusted step by step, and polyethylene glycol is introduced, so that the tap density is improved, the iron phosphate battery precursor has a large specific surface area, large and small particle grading is formed, and the compaction performance of lithium iron phosphate is improved.

The invention discloses a construction device for preparing a modified ardealite highway subgrade. The construction device comprises a construction vehicle, raw material boxes arranged on the construction vehicle side by side, a material mixing mechanism arranged in the construction vehicle, a compaction mechanism arranged on the rear side of the construction vehicle and a control system in the construction vehicle. Raw material boxes on the construction vehicle are sequentially a water tank, a cement box, a modified phosphogypsum powder box, a clay powder box and a cement mortar box from the rear side to the front side. The material mixing mechanism comprises a material discharging auger assembly, a material mixing rocking hopper, a material discharging box and a humidifying spray head; the compacting mechanism comprises a dragging plate, a first pressing roller and a second pressing roller. Raw materials are dried in advance and loaded into the respective box bodies respectively, mixing in advance is not needed, raw material waste is avoided, the proportioning proportion can be adjusted at any time according to needs, the raw materials are discharged into the mixing rocking hopper according to the proportion to be shaken up, sieved and fall down, then the raw materials are laid on a road in two layers through humidification, and the raw materials are compacted step by step to reduce flying dust, so that the road quality is improved. And the raw materials absorb water and agglomerate, so that the strength of the roadbed is improved.

The utility model relates to the technical field of solid waste treatment, in particular to a compression device for solid waste treatment, which comprises a solid waste treatment box, a first hydraulic rod and a second hydraulic rod mounted on two sides of the solid waste treatment box, a drain pipe arranged on the right side of the bottom of the solid waste treatment box, and a drawer slidably arranged on the front side of the solid waste treatment box. A feeding port and a motor are arranged on the upper side of the solid waste treatment box, the output end of the motor rotationally penetrates through the inner side of the solid waste treatment box, a cutting stirring blade is fixedly installed at the output end of the motor, and a smashing cylinder is arranged on the outer side of the cutting stirring blade. According to the solid waste compaction device, solid waste is smashed before solid waste compaction work, the appearance of the solid waste is reduced, large gaps are eliminated, the compaction degree in the later period is higher, in addition, water in the solid waste is compacted and separated out in the compaction process and is discharged through the drainage filter holes, compaction and drainage are synchronously carried out, and the compaction efficiency is improved. Solid waste compressed blocks compacted by the solid waste compacting machine are high in compaction degree, low in water content and convenient to transport and store.

The invention discloses a system and a method for predicting the optimal excitation frequency of a vibratory roller based on machine learning, and the method comprises the following steps: S1, collecting the original data of soil under different conditions and the working parameters of the vibratory roller under the conditions, investigating the parameters of different models of vibratory rollers, and processing and storing the data; s2, a machine learning algorithm in MATLAB is selected and trained, a machine learning-based optimal excitation frequency prediction model of the vibratory roller is obtained, and thus the predicted soil inherent frequency can be obtained; and S3, comparing the difference between the predicted soil inherent frequency and the soil inherent frequency measured in actual work, and adjusting and optimizing the prediction model in S2. According to the method, the optimal excitation frequency of the vibratory roller is predicted before construction, the prediction precision is improved by integrating factors such as the environment, the pavement type, the soil density and the compaction degree, and the operation requirements of the vibratory roller under different regions and different pavement conditions can be met.

The invention discloses a leveling device for paving a pervious concrete pavement and a leveling method thereof, and relates to the technical field of pavement paving, the leveling device comprises a vehicle body, a box body is fixedly mounted at the top of the vehicle body, a charging box is fixedly mounted at the upper end of an inner cavity of the box body, and the bottom of the charging box is connected with a leveling assembly through a pipeline; and the leveling assembly is used for paving pervious concrete on the earth road. According to the leveling device for paving the pervious concrete pavement and the leveling method of the leveling device, the size of the discharging groove in the collecting hopper can be automatically adjusted through the arranged adjusting part according to the actual condition of the pavement, so that the discharging amount of concrete is accurately controlled, and the discharging groove is enlarged at the sunken part of the pavement so as to increase the discharging amount of the concrete and fill the sunken part; at the raised part of the road surface, the discharge chute is reduced to reduce the discharge amount of concrete and avoid excessive accumulation, and the intelligent adjustment ensures the flatness of concrete laying and improves the construction quality.

The utility model relates to the technical field of waterproof coiled material processing, in particular to a waterproof coiled material laying and compacting device. The device comprises a rack and a wall pressing mechanism, a moving assembly is arranged at the bottom of the rack, a ground pressing assembly is arranged on the rack in a lifting mode, the ground pressing assembly comprises a motor, and the motor drives the ground pressing assembly to move; the wall pressing mechanism is arranged on the rack in a sliding mode and comprises a wall pressing assembly used for pressing a wall, a plurality of guide rods c arranged on the wall pressing assembly and connected with the rack in a sliding mode, a spring b arranged between the rack and the wall pressing assembly and a fixing rod detachably arranged on the wall pressing assembly and the rack, and the fixing rod is in threaded connection with the rack and the wall pressing assembly. The compaction effect of the device can be improved by applying pressure to the wall pressing assembly through the spring.