51results about How to "Improve compaction" patented technology

The utility model discloses a kind of composite fireproof insulation board laminating device, the utility model relates to thermal insulation board laminating technical field.It is laminated mechanism for composite fireproof insulation board and is provided on the mounting base, laminated mechanism includes: press-fit component, including the support rod fixed with both side walls of mounting base, the upper end of the support rod is provided with the mounting plate connected by lifting assembly, the lower end surface of the mounting plate is provided with the pressure plate main body connected by elastic component, the lower end inside of the pressure plate main body is provided with rectangular frame slot, the inside of the rectangular frame slot is provided with the rectangular pressure plate connected by telescopic component, the utility model is driven rectangular pressure plate telescopic by second hydraulic rod, realize the pertinence pressure to the edge of thermal insulation board, since the edge of thermal insulation board is prone to the problem of not firm combination when laminating, can effectively improve the compaction degree and bonding strength of edge, avoid edge curling, delamination and other quality problems.

This application provides a sludge thickening device and method for an integrated aeration sedimentation tank, comprising: a tank with a conical zone at the bottom; a sludge inlet pipe with a dosing pipe connected in parallel at the top, the bottom end of the sludge inlet pipe passing through the center of the tank; sludge distribution pipes arranged in a cross shape and connected to the sludge inlet pipe; supernatant collection pipes distributed in the upper and middle parts of the tank and connected in parallel to the outlet; and an ultrasonic sludge level gauge fixed on one side of the top surface of the tank. By providing a dosing pipe and a pipe mixer at the front end of the sludge inlet pipe, the flocculant can be fully mixed with the sludge water in the pipe. By providing a sludge distribution pipe at the tail end of the sludge inlet pipe, the sludge mixed with the flocculant is evenly distributed throughout the tank, which can improve the sludge dewatering efficiency. At the same time, the conical zone can increase the sludge concentration, and a self-cleaning filter screen is provided above the sludge distribution pipe to further filter the sludge and improve the sludge dewatering speed.

This invention belongs to the field of hard carbon technology, specifically relating to a bamboo-based and lignin-based hard carbon composite material, its preparation method, and its applications. The process involves pretreating raw materials to obtain pretreated material; pretreating the pretreated material with an acidic oxidant to obtain acidic oxidant pretreated material; pre-oxidizing the acidic oxidant pretreated material to obtain pre-oxidized material; pre-carbonizing the pre-oxidized material under a protective atmosphere to obtain pre-carbonized material; pulverizing the pre-carbonized material to obtain pulverized material; acid washing followed by water washing to obtain purified material; soaking the purified material in acid, filtering, and drying to obtain soaked material; mixing the soaked material with a modifier, and high-temperature coating and carbonizing under a protective atmosphere to obtain bamboo-based coated hard carbon or lignin-based coated hard carbon. Mixing the two types of hard carbon and carbon coating yields a bamboo-based and lignin-based hard carbon composite material, which is used in negative electrode sheets and batteries. When applied to batteries, the hard carbon composite material of this invention can improve battery energy density.

The utility model relates to the technical field of powder cosmetic processing, in particular to an automatic powder pressing and typesetting device for powder cosmetics. According to the technical scheme, the powder pressing device comprises a powder pressing table, a sliding groove is formed in the top face of the powder pressing table, a first motor is arranged on the right side of the powder pressing table, the output end of the first motor penetrates and extends into the sliding groove and is provided with a screw rod, the outer ring of the right end of the screw rod is in threaded connection with a threaded block, and a containing table is arranged on the top face of the threaded block; and a mounting groove is formed in the placement table, and a gear is rotationally arranged on the inner bottom surface of the mounting groove. According to the device, a cosmetic box is conveniently clamped and fixed by arranging the placing table to the clamping plate, the gram weight of powder is conveniently and quantitatively controlled by arranging the vertical plate to the discharging pipe, the powder is conveniently compacted by arranging the L-shaped bracket to the pressing module, and automatic feeding, powder pressing and transferring are conveniently carried out by arranging the motor I to the threaded block; and the powder pressing precision and efficiency are improved.

The invention belongs to the technical field of road engineering, and discloses a concrete bridge deck pavement structure and a construction method.The concrete bridge deck pavement structure comprises a concrete base layer, the top of the concrete base layer is covered with a waterproof binder, and the top of the waterproof binder is covered with an asphalt concrete mixture; the top of the asphalt concrete mixture is covered with a stone mastic asphalt mixture; the waterproof binder adopts an asphalt binder or an epoxy resin binder; the paving thickness of the asphalt concrete mixture is 4.5 cm, and the paving thickness of the stone mastic asphalt mixture is 4 cm. By optimizing the thickness combination of the upper surface layer and the lower surface layer and improving a waterproof binder material and a forming process, light weight, durability and economization of bridge deck pavement are achieved, and the bridge deck pavement structure can be suitable for bridge engineering in high-temperature and rainy areas.

According to the spraying dust removal device capable of leveling the land and used for the construction site, a first leveling mechanism and a second leveling mechanism are arranged, the ground is pressed through a pressing roller ring at the tail of a vehicle plate, vibration pressing boxes compact the two sides of the vehicle plate under the action of a vibration motor, and due to the fact that the two ends of the pressing roller ring and the two vibration pressing boxes are staggered in the range, the two sides of the vehicle plate are tightly pressed; therefore, the road surface can be fully leveled, dust in the air is mixed with water and falls on the ground under the action of the fog gun machine in the reciprocating motion process of the tricycle main body, the purpose of road leveling is achieved through the pressing and compacting action of the pressing roller ring and the vibration box, and the problems that an existing fog gun machine can only carry out dust falling treatment on raised dust, and the road surface cannot be leveled easily are effectively solved. The problems that the road cannot be leveled, dust on the road can be raised repeatedly when the engineering vehicle runs, and dust raising cannot be restrained are solved.

The invention relates to the technical field of waste battery recovery, and particularly discloses a direct regeneration method of a high-performance waste lithium iron phosphate battery material. The materials comprise waste lithium iron phosphate, lithium carbonate, soluble salt corresponding to magnesium or titanium, graphene, a glucose reducing agent, an adaptive organic solvent and the like; the method comprises the following steps: pretreating the waste battery, calcining to prepare an oxidation precursor, respectively preparing an ion dopant solution and a graphene dispersion liquid, sequentially mixing the raw materials, carrying out wet ball milling, drying and inert atmosphere preheating, and synchronously carrying out oxidation precursor reduction, ion doping and graphene compounding through high-temperature reduction. The regenerated lithium iron phosphate material can be used in the fields of electric vehicle power batteries, high-end energy storage systems and the like, and has the advantages of excellent electrochemical performance, structural stability and compaction performance; the method provided by the invention has the advantages of controllable operation, flexible raw material adaptation and high-valued recovery of waste materials, and can effectively improve the performance shortages existing in the traditional process.

The utility model belongs to the technical field of building new material plate production, and particularly relates to a building new material plate compacting device which comprises an operation table, a supporting table is fixedly connected to the outer wall of the operation table, a compacting mechanism is arranged on the supporting table, a demolding mechanism is arranged below the compacting mechanism, and the demolding mechanism comprises a frame body. And a long plate and a short plate are arranged in the frame body. According to the new building material plate compacting device, after a plate is formed, a hydraulic cylinder b is controlled to drive a long plate and a short plate to return to original positions, so that the plate is preliminarily separated from the inner walls of the long plate and the short plate, then a hydraulic cylinder c is controlled, and at the moment, a material ejecting plate fixed to the output end of the hydraulic cylinder c can eject the formed plate out of a frame body; by means of the design, the demolding process is smoother, the plate is directly ejected out of the frame body through the ejector plate, an operator can conveniently, rapidly and conveniently take materials, the production efficiency is greatly improved, and the labor intensity is reduced.

The utility model discloses a disposable water cup meal box production waste material processing device, including base, the top of base is installed with box, and the top of box is installed with the mounting plate of extrusion mechanism, and the top of box is installed with the casing of extrusion mechanism. The utility model discloses a casing is installed at the top of box, and the hydraulic rod work of mounting plate one side will drive the presser plate to remove, when the waste material falls into the inside of casing, and the presser plate removal will extrude the waste material, can extrude the waste material into the cake shape, and the third motor work will drive first transmission gear to rotate, and first transmission gear rotation will drive second transmission gear to rotate, and second transmission gear rotation will drive screw rod rotation, and screw rod rotation will drive screw block to go up and down, and screw block goes up and down drive push plate to go up and down, and push plate ascension will extrude the waste material in the inside of box, and the convenient discharge, to this to reach disposable water cup meal box production waste material processing device is convenient to the purpose of compaction to material.

The utility model discloses irrigation equipment for landscaping, which belongs to the technical field of landscaping equipment and comprises a base, universal wheels are rotatably connected to four corners of the bottom of the base, a push rod is fixedly connected to the outer side of the base, a supporting block is fixedly connected to the top of the base, and a water bucket is arranged at the top of the base. A water adding opening is formed in the top of the water bucket, an input pipe is fixedly connected to the outer side of the water bucket, a water pump is fixedly connected to the top of the base, an output pipe is fixedly connected to the output end of the water pump, a spray head is fixedly connected to the end, away from the water pump, of the output pipe, a shaking mechanism is arranged on the periphery of the water bucket, and a soil piercing mechanism is arranged at the bottom of the base. The shaking mechanism prevents the nutrient solution in the bucket from precipitating, the irrigation uniformity is improved, the soil loosening mechanism assists in achieving soil loosening, the hardening problem is solved, and the water permeation efficiency is improved.

The utility model discloses asphalt paving and compacting equipment, which relates to the technical field of road construction and comprises a frame, a compression roller component, a scraping component, a fixing component and a re-pressing component, the compression roller component with adjustable width is mounted at the foremost end of the frame, the fixing component for limiting and fixing the compression roller component is mounted on the frame, and the scraping component is mounted on the frame. A scraping assembly used for scraping off asphalt materials is installed between the pressing roller assembly and the vehicle frame, a re-pressing assembly used for conducting secondary re-pressing is installed in the middle of the vehicle frame and comprises a lifting frame installed in a vehicle frame cavity, and multiple sets of re-pressing rollers arranged front and back at intervals are installed below the lifting frame. The problems that according to existing compaction equipment, asphalt materials on compression rollers are treated in a water spraying mode, more water resources are wasted, the cost is high, the capacity of a collecting box and a water tank is limited, cleaning and replacement need to be stopped in the compaction process, and operation is inconvenient are solved.

The invention discloses a method for arranging a dam crest formwork increasing area on a core-wall rockfill dam to control water storage cracking and an earthquake response whip effect, a formwork increasing rockfill area is arranged at the position 1 / 3-1 / 5 of the dam height below the dam crest, the filling standard is controlled by adopting double indexes of porosity and relative density, it is guaranteed that the formwork increasing rockfill area reaches the full compaction degree, and the dam crest formwork increasing area is arranged at the position 1 / 3-1 / 5 of the dam height. The crack of the core-wall rock-fill dam is controlled, the whip effect of earthquake response of the rock-fill dam is effectively reduced, and the method for controlling the crack of the dam and improving the anti-seismic safety performance is expected to be achieved.

The application relates to the field of food biotechnology, and discloses a low-salt bean paste production process based on segmented temperature control fermentation, which is made of fava bean koji, water, edible salt, sodium hexametaphosphate, lactococcus lactis nisin, edible alcohol, granulated coarse granular calcium carbonate and glucono-delta-lactone. The production process comprises the following steps: constructing a composite matrix, and first performing buffer-type medium-temperature enzymolysis; then adding a glucono-delta-lactone aqueous solution in a flow manner, utilizing the stoichiometric coupling reaction of the glucono-delta-lactone aqueous solution and the granulated coarse granular calcium carbonate to generate carbon dioxide in situ to construct a micropore structure and regulate the pH value of the system; and finally, connecting a Zygosaccharomyces rouxii to perform low-temperature aroma-producing after-ripening. Through the synergistic effect of the components, the application effectively solves technical problems in the low-salt fermentation process, such as low protein solubility, easy compaction of the matrix and breeding of miscellaneous bacteria, and improves the amino acid nitrogen content and protein hydrolysis rate of the finished product.

The invention provides an asphalt pavement coring hole repairing structure, which comprises an asphalt pavement body, the asphalt pavement body comprises a pavement surface layer, and the pavement surface layer is provided with a surface layer coring hole; the repairing body is fixedly arranged in the surface layer coring hole through an auxiliary repairing mechanism, the repairing body comprises a repairing body, the repairing body comprises a core filling precast block and an expansion filling body, the core filling precast block is arranged in the center of the surface layer coring hole, and the expansion filling body is arranged on the periphery of the core filling precast block. The invention further provides an asphalt pavement coring hole repairing method. By means of the expansion characteristic of the expansion filling body, the compaction effect of the core filling prefabricated block and the side wall of the coring hole is enhanced; and meanwhile, by means of the characteristics of low-temperature shrinkage and high-temperature softening of the asphalt pavement material, the filling compaction degree in the coring hole and the interface bonding firmness strength of the coring hole are further improved.

The utility model provides a kind of compaction device for bridge and culvert platform back, including frame body, compaction plate and vibration generating mechanism, compaction plate is slidably installed on frame body along height direction, and vibration generating mechanism is installed on compaction plate;Vibration generating mechanism includes drive source, driving gear, driven gear, pivot and eccentric wheel, drive source is installed on compaction plate, pivot is rotatably connected on compaction plate, driving gear is coaxially fixedly connected with the output end of drive source, driven gear is coaxially fixedly connected on pivot, driving gear is engaged with driven gear, eccentric wheel is eccentrically fixedly connected on pivot.By drive source driving driving gear rotation, driven gear, pivot and eccentric wheel are driven to rotate, and then compaction plate is driven to vibrate strongly to compact ground, compared with the device using gravity to compact has better compaction effect, and the overall volume of device is smaller, and it is convenient to compact bridge platform back and culvert two ends platform back.

The invention discloses a ferric sodium pyrophosphate composite positive electrode material and a preparation method and application thereof. The composite positive electrode material is composed of ferric sodium phosphate pyrophosphate and carbon, the surface of the ferric sodium phosphate pyrophosphate is coated with the carbon, the molar ratio of sodium to iron to phosphorus is 4: (3-y): 4, y is larger than 0 and smaller than or equal to 0.5, the carbon content is 1-10 wt%, and the composite positive electrode material does not contain associated phases. The preparation method comprises the following steps: adding water into an iron source, a sodium source, a phosphorus source and a carbon source to prepare a mixed solution, and drying to obtain precursor powder; sintering under the protection of inert gas to form a semi-finished body, carrying out ball milling or sand milling on the semi-finished body, and then carrying out spray drying; and finally sintering under the protection of argon or nitrogen to obtain a finished product. The raw materials are cheap and easy to obtain, process parameters are accurately controlled through a two-step heat treatment method, the compaction degree and the compaction degree of the material are remarkably improved, the electrochemical performance is optimized, and the preparation method has important application value in the field of sodium ion secondary batteries.

The invention relates to the field of negative electrode materials, and provides a super-capacity and overpressure graphite negative electrode material which is prepared by modifying graphite through organic amine hydrochloride, so that the surface of the graphite carries a certain amount of active groups, and the active groups are chemically bonded with resin which is subsequently coated on the surface of the graphite, so that the super-capacity and overpressure graphite negative electrode material is obtained. The chemical bonding greatly enhances the interface bonding strength of the resin and the graphite, the resin forms a coating layer with a stable structure on the surface of the graphite, and the negative electrode material obtained after graphitization treatment has the characteristics of high capacity, high compaction, good rate capability, strong electrolyte compatibility and the like.

The utility model provides a kind of food sample stationary device, it is related to food detection technical field, including box, top frame, bottom frame, two partition plates and four slide bars, top frame is located in the upper end inside of box, bottom frame is located in the lower end inside of box, two partition plates are respectively detachably connected with top frame and bottom frame, four slide bars are respectively vertically arranged in the four corners inside box and pass through the four corners of bottom frame, the lower end both sides of top frame are equipped with sliding slot, the both sides of sliding slot are equipped with sliding block, sliding block can horizontally slide in sliding slot. The utility model is rotated by rotating the handle outside box, so that handle controls two bidirectional screw rods to rotate by synchronous belt, each bidirectional screw rod controls corresponding two sliding blocks to be close to each other or away from each other, sliding block is offset by single rotary seat to push support rod, and then bottom frame is controlled to move up and down by double-head rotary seat, change the distance between two partition plates, adjust the height of sample, convenient for sample to be taken out from small test tube or flat container.

The present application relates to the technical field of rice seedling strengthening, and provides a rice biological seedling strengthening agent, which comprises the following raw materials in parts by weight: 8-15 parts of a compound microbial agent, 20-30 parts of humic acid, 10-18 parts of a chelating agent, 0.2-0.8 parts of a plant growth regulator, 35-45 parts of an organic carrier and 0.5-1.2 parts of a biological penetrant. The present application can effectively improve the physicochemical properties of the rice seedling substrate, promote the development of the rice seedling root system and the thickening of the stem, and significantly improve the comprehensive stress resistance performance of the seedling, such as low-temperature resistance, drought resistance, disease and pest resistance, and lodging resistance, so as to improve the survival rate of the seedling, the yield and quality of the rice in the later period, and solve the problems of single fertilizer effect, weak stress resistance effect and easy seedling overgrowth of the existing seedling strengthening agent.

The invention discloses a special fertilizer for promoting blossom, protecting fruits, increasing yield and improving quality of anise and a preparation method thereof, and belongs to the field of organic fertilizers. The formula comprises the following components in parts by mass: 500 parts of compound fertilizer, 20 parts of borax, 200 parts of medium trace element fertilizer, 40 parts of peanut bran, 360 parts of dried pig manure, 40 parts of fishbone dust, 230 parts of mushroom residues and 4 parts of microbial flora. The microorganism bacterium is a bacillus stearothermophilus fermentation bacterium agent; the nutrient content of the biological organic fertilizer is not less than 15%, and the organic matter content is not less than 40%. The borax and the medium trace elements in the formula have a synergistic effect and are matched with the microbial flora to promote nutrient absorption, so that anise bud cultivation can be effectively promoted, the flowering amount and the fruit setting rate are increased, leaves and growing branches of anise after fertilization are increased, the leaf color is dark green, and flower and fruit falling phenomena are obviously reduced. The high organic matter content can improve the soil hardening condition and improve the soil breathability and the water and fertilizer retention capacity, the microbial flora adjusts the soil micro-ecology, the soil fertility can be continuously improved after long-term application, and healthy growth of anise trees is promoted.

The application discloses a high-load dry-method electrode preparation method in the technical field of energy storage batteries, and comprises the following steps: S1, stirring and mixing of a conductive agent and a binder to obtain intermediate 1; S2, low-degree fiberization of intermediate 1 by stirring to obtain intermediate 2; S3, addition of an active material to intermediate 2 and low-speed stirring to obtain intermediate 3; S4, fiberization of intermediate 3 by stirring to obtain a granular active material mixture; S5, repeated multiple times of pressure extension and thinning of the active material mixture by using a hot-pressing device until the compaction density reaches a set value, and multiple self-supporting films with high compaction density are obtained; S6, sequential adhesion and compounding of the multiple self-supporting films to a current collector by using conductive glue to obtain a composite self-supporting film, and hot-pressing of the composite self-supporting film and the current collector to obtain a high-load dry-method electrode sheet. The thin film sheet with higher compaction density is obtained by multiple times of thinning, and the electrode sheet with high load is obtained by the lamination and compounding method.

The invention relates to the technical field of agricultural planting equipment, in particular to efficient sweet potato planting equipment for hilly dry land, and solves the problems that when sweet potatoes are mechanically and transversely planted, the sweet potatoes are placed on the surfaces of ridges in the direction perpendicular to the ridges, follow-up soil covering and compaction are needed, the positions of sweet potato seedlings are not fixed, and the sweet potato seedlings are prone to deviation; and additional operation is needed for compaction, so that the planting time is prolonged. Comprising a soil loosening module and an output motor, the soil loosening module comprises a protective shell, a connecting column is detachably installed at the top end of the protective shell, and fixing plates are fixed to the two ends of the protective shell. While rotary tillage and soil loosening are conducted, power is transmitted to the linkage rotating shaft through the transmission module, so that the linkage rotating shaft drives the transmission connecting rod and the transmission frame to move through the transmission belt wheel, the transmission belt and the transmission disc, the grooving pressing strip reciprocates up and down and grooves are formed in the top of a ridge after ridge dividing, and fixed-point placement of sweet potato seedlings is achieved.

This invention relates to positive electrode active materials, their preparation methods, and lithium secondary batteries comprising said positive electrode active materials, wherein the positive electrode active materials comprise the formula Li 1+a1 Ni x1 Co y1 M z1 M′ 1‑x1‑y1‑z1 O2 represents polycrystalline particles and Li 1+a2 Ni x2 Co y2 M z2 M′ 1‑x2‑y2‑z2 O2 represents single-crystal particles.

The application discloses a kind of anti-chlorine salt erosion rubber modified asphalt pavement pit slot repair composite process, in view of the interface peeling caused by chlorine salt erosion in traditional repair process, short repair life problem, innovatively proposes the three-stage repair system of "debridement-interface activation-bionic filling": (1) rough interface is formed by using high-pressure cyclone debridement device to remove loose debris;(2) spray anti-chloride bonding layer containing nano-silane coupling agent, the depth of penetration reaches 3-5mm, forms chemical barrier;(3) layered filling rubber modified asphalt mixture, the gradient compaction is implemented in 30-50Hz of adjustable frequency vibrating road roller.The application improves the interface strength by molecular bonding and mechanical interlocking dual action, realizes the dual anchoring of chemical bonding and mechanical engagement effect of repair layer and original pavement, improves the interface bonding strength, prolongs the service life of repair layer, effectively solves the technical problem that pit slot repair layer is easy to debond and fails in chlorine salt environment, and is suitable for the rapid repair of pavement diseases in coastal areas and road sections where deicing agent is used a lot in winter.

This invention discloses a vehicle-mounted automatic compaction device for asphalt pavement repair, belonging to the field of road construction machinery technology. It includes a mounting frame connected to a vehicle frame and a compaction roller assembly. The compaction roller assembly is driven by a swinging component to move left and right along a long track below the mounting frame. A front push plate is located in front of the pressure roller of the compaction roller assembly. Both ends of the front push plate are connected to the pressure roller frame of the compaction roller assembly through adjustment mechanisms. Pressure is applied to the pressure roller through a hydraulic system. The mounting frame is connected to the vehicle frame by pins for easy loading and unloading. The swinging component drives the pressure roller to move left and right, enabling pothole repair while the vehicle is stationary. The front push plate pushes away excess asphalt mixture, meeting the high-pressure compaction requirements. This invention enables rapid repair of asphalt pavements; the hydraulic system controls the ground pressure of the pressure roller, achieving light and heavy compaction effects, thus ensuring rapid maintenance of asphalt pavements.

The invention belongs to the technical field of soil improvement, and relates to a planting method combining protective tillage with organic fertilizer application. The invention provides a planting method combining protective tillage with organic fertilizer application, which comprises the following steps: performing deep scarification before sowing, then applying modified starch, a microbial organic compound fertilizer and a nitrogen-phosphorus-potassium ternary compound fertilizer, and finally sowing crops, the modified starch is phosphorylated distarch phosphate or acetylated distarch phosphate; the effective viable count in the microbial organic compound fertilizer is more than or equal to 5 billion / g, and the organic matter content is more than or equal to 60%. According to the method, the influence of different cultivation modes and different auxiliary additives on the soil organic matter content and nutrient circulation is explored. In this way, the organic matter content of the soil can be protected and increased, and the fertility and stress resistance of the soil are enhanced.

The utility model discloses a kind of pressing device of traditional Chinese medicine decoction pieces production, fixed support frame inner side one end is equipped with rotary motor by motor base, rotary motor output shaft top end is clamped with rotary forming die, fixed support frame one end is clamped with outgoing electric push rod, outgoing electric push rod one end is clamped with outgoing scraping ring, rotary forming die inner side is slidably connected with lifting moving block, fixed support frame inner side one end is equidistantly installed with several processing hydraulic cylinders, the top of multiple processing hydraulic cylinders is installed with fixed electromagnet, fixed support frame inner side is clamped with several lower displacement hydraulic cylinders, the utility model is driven outgoing electric push rod outgoing scraping ring to promote decoction piece discharge, so that when carrying out tablet production, the position of feeding, discharge and pressing can be dispersed, reduce the waiting time generated by feeding and discharging, and utilize twice pressing, increase the time of pressing, guarantee the compactness of product, improve the quality and overall production efficiency of product.

The invention discloses a dry snow compactness detection method and system based on vibration liquefaction, and belongs to the technical field of environment monitoring. Image data and temperature data of a target snow layer in a target area are acquired, first vibration data and first resistance data detected by a probe are recorded, and snow layer distribution data corresponding to preset position coordinates in the target area are determined according to the image data and the first resistance data; determining second vibration data and second resistance data of the preset position according to the snow layer distribution data, the first vibration data and the first resistance data; and determining the compaction degree of the target area according to the temperature data, the first vibration data, the first resistance data, the second vibration data, the second resistance data and a snow layer identification model. The dry snow compaction degree monitoring method and device achieve the beneficial effect of improving the accuracy and efficiency of dry snow compaction degree monitoring.

The application discloses a preparation method of a high-compaction high-multiplying lithium manganese iron phosphate positive material, which comprises the following steps: dissolving lithium dihydrogen phosphate in water, adding iron phosphate to uniformly disperse, and obtaining iron phosphate slurry with surface enrichment of lithium dihydrogen phosphate; mixing the iron phosphate slurry, a manganese source and water to uniformly form a slurry; and adding a lithium source, a carbon source and double dopants, uniformly stirring, and then performing spray drying and sintering to obtain the lithium manganese iron phosphate positive material. The lithium manganese iron phosphate prepared by the method has high compaction performance, and the compaction density can reach 2.34 g / cm 3 The manganese dissolution phenomenon is reduced, the highest manganese dissolution is not more than 83 ppm after 1C cycle for 1000 times, the electrochemical performance is effectively improved, and the discharge can reach more than 132 mAh / g after 1C cycle for 1000 times.

The utility model discloses a watering device for a road roller, which comprises a connecting plate arranged at the top of the road roller, the connecting plate is rotatably connected with the road roller through a rotating shaft, the inner wall of the connecting plate is fixedly connected with a spraying pipe, and a water inlet of the spraying pipe penetrates to the top of the connecting plate. According to the utility model, the plug pin in a figure state is taken out, the connecting plate is rotated anticlockwise through the rotating shaft, so that the spraying pipe is rotated to the right side of the road roller, the limiting sleeve on the inner wall of the connecting plate is aligned with the limiting seat on the right side of the road roller up and down, the plug pin is inserted into the limiting sleeve and the limiting seat, and then the water pump conveys water in the water tank into the spraying pipe; when the road roller is driven, water is sprayed out of the nozzle, the road roller is driven to wet the roadbed ground, then the roadbed is compacted and dust raising is restrained, after the wetting work is completed, the spraying pipe is reset to the figure state, the water sprayed out of the nozzle is sprayed on steel wheels of the road roller, and then excessive impurities are prevented from being bonded on the steel wheels when the road roller is driven to press the roadbed.