289results about How to "Reduce direct contact" patented technology

The lithium nickel manganese oxide positive electrode material, the preparation method thereof and the electrochemical device are characterized in that the lithium nickel manganese oxide positive electrode material provided by the embodiment of the invention comprises a base material and a coating layer located on the surface of the base material, the general formula of the base material is Li (LiaNixMnyMbO4), the element M comprises at least one of Ti, Zr, Al, Nb and Mo, and a is more than or equal to 0.02 and less than or equal to 0.06; 0.45 < = x < = 0.55, 1.4 < = y < = 1.6; 0.05 < = b < = 0.55; a + x + y + b = 2, and the coating layer contains phosphate. According to the lithium nickel manganese oxide positive electrode material, through doping and coating technologies, under the condition that the capacity is not sacrificed, the gas production phenomenon is effectively reduced, the cycling stability of the lithium nickel manganese oxide positive electrode material is improved, and the service life of an electrochemical device applying the lithium nickel manganese oxide positive electrode material is prolonged.

The invention discloses a sow vaccine injection method based on deep learning and machine vision. The sow vaccine injection method comprises the following steps that 1, an AGV chassis is controlled to arrive at a work station according to an instruction; 2, visually recognizing the posture of the sow to be injected, and if the recognition result is that the sow to be injected is in a non-standing posture, driving up the sow to be injected with manual assistance; if the recognition result is a standing posture, visually guiding the mechanical arm to move to a photographing position; 3, the RGBD camera shoots in real time to obtain the injection position and distance of the sow to be injected, and the mechanical arm moves to position the injection clamp to the pre-injection position; 4, injection is completed, and an injection result is recorded; the invention further discloses a sow vaccine injection system based on deep learning and machine vision. Manual operation is replaced by mechanical operation, automation of the vaccine injection process is achieved, direct contact between personnel and sows is reduced, and the risk of infectious disease transmission is reduced.

The invention discloses a dexterous hand finger based on connecting rod transmission, a bionic mechanical arm and a humanoid robot, belongs to the field of bionic mechanical arms, solves the problem that a transmission mechanism of an existing dexterous hand is low in response speed, and adopts the technical scheme that the dexterous hand finger mainly comprises a finger base and a finger body, a driver and a transmission mechanism in transmission connection with the driver are arranged on the finger base, the driver drives the finger body to bend and / or swing through the transmission mechanism, the transmission mechanism comprises a guide piece and a sliding block installed on the guide piece in a sliding mode, and the sliding block is in transmission connection with the finger body. A traction rope connected with the sliding block is wound on an output shaft of the driver, the driver controls the output shaft to rotate forwards and backwards so as to drag the sliding block to slide back and forth along the guiding piece through the traction rope, and then the finger body is controlled to bend and / or swing. The finger is mainly used for driving the sliding block to move through the pulling rope so as to control the finger body to bend and swing, and the response efficiency of the finger body can be improved.

The utility model relates to an automatic sorting device for lens disassembly, which relates to the technical field of lens disassembly and comprises a storage bin used for storing lenses to be disassembled and a feeding and discharging Y shaft arranged on one side of the storage bin and used for moving the lenses in a tray out to a working area. The jacking and clamping double-station assembly comprises a clamping head for clamping a to-be-disassembled lens, a lead screw motor for ejecting out to-be-sorted components in the lens in the direction below the clamping head, a component pre-pressing plate piece for pre-pressing the products to prevent the products from scattering and inclining, and a pre-pressing mechanism switching shaft for adjusting the position of a pre-pressing mechanism. An inverted U-shaped support plate is arranged on the top surface of the free end of the component pre-pressing plate piece, the inner wall of the U-shaped support plate is connected with a vacuum chuck tailstock through a lifting component, the bottom surface of the vacuum chuck tailstock is connected with a vacuum chuck piece through a pipeline longitudinally penetrating through the component pre-pressing plate piece, and the vacuum chuck piece adsorbs a component in a lens in a product.

The invention relates to a preparation method of a gel electrolyte with an efficient flame-retardant characteristic. The gel electrolyte is mainly composed of a gel matrix, a flame retardant and an electrolyte solution. The invention provides a method for preparing a flame-retardant gel electrolyte, and application of the flame-retardant gel electrolyte in energy storage equipment such as a lithium ion battery is described in detail. The flame-retardant gel electrolyte has excellent flame retardance, and the safety performance of a battery system can be effectively improved. The preparation method comprises the following specific synthesis steps: (1) firstly, mixing polyethylene oxide (PEO) with a solvent, then adding lithium hexafluorophosphate (LiPF6) electrolyte salt, and uniformly stirring to form a uniform solution; and (2) adding trifluoroethyl methacrylate and a PEGDMA initiator into the solution, carrying out polymerization reaction to form a composite skeleton, and infiltrating the electrolyte under the swelling action to finally form the gel electrolyte. And (3) drying the swelled gel electrolyte to remove redundant solvent and moisture, and then cutting and packaging to obtain the gel electrolyte with high flame retardance. The flame retardance of the electrolyte is remarkably improved by reducing the using amount of the electrolyte and polymerizing and curing the electrolyte.

The invention provides a silicon carbon material with a multilayer coating structure and a preparation method and application thereof, and relates to the technical field of battery materials. The silicon-carbon material with the multi-layer coating structure comprises a porous carbon core body, and a first carbon layer and a second carbon layer which sequentially coat the porous carbon core body from inside to outside, and the porous carbon core body comprises porous carbon and nano silicon particles deposited on the surface and in pore channels of the porous carbon; and a conductive nano carbon filler is dispersed in the second carbon layer. The silicon carbon material with the multilayer coating structure provided by the invention is used as a lithium ion battery negative electrode material, and has excellent specific capacity, coulombic efficiency and cycle performance. The result of the embodiment shows that when the silicon carbon material with the multi-layer coating structure is applied to the lithium ion battery, the first reversible capacity is 1882-2071 mAh / g, the first coulombic efficiency is 92.6-94.1%, and the capacity retention ratio of 100 cycles is 95.3-97.7%.

The invention relates to the technical field of cutting fluids, and discloses a high-temperature alloy cutting fluid and a preparation method thereof, the high-temperature alloy cutting fluid comprises the following components: 30%-50% of base oil, 5%-10% of organic alkali, 5%-10% of an antirust agent, 4%-10% of synthetic ester, 15%-20% of an anti-wear reagent at extreme pressure, 0.5%-1.5% of a corrosion inhibitor, 7%-15% of an emulsifier, 2%-4% of a bactericide, 0.05%-0.1% of a defoaming agent, and the balance of water; the extreme pressure anti-wear agent is composed of a chlorination extreme pressure anti-wear agent and a vulcanization extreme pressure anti-wear agent. According to the invention, the ester-based base oil, the organic alkali, the synthetic ester and the extreme pressure anti-wear agent composed of the chlorination extreme pressure anti-wear agent and the vulcanization extreme pressure anti-wear agent are combined to form a continuous high-strength lubricating film, and the continuous high-strength lubricating film is compounded with additives such as the organic acid antirust agent, the corrosion inhibitor and the bactericide; therefore, the antirust corrosion inhibition performance of the cutting fluid on workpieces and machine tools and the long-term use safety and environmental protection performance are improved during processing.

The invention discloses a method for improving the efficiency of a perovskite solar cell, and belongs to the technical field of solar cells. The insulating spacer film prepared between the electron transport layer and the perovskite layer of the perovskite solar cell by adopting the electron beam evaporation method has high uniformity, the cell interface structure can be optimized, defects are reduced, charge recombination loss is reduced, and the photoelectric conversion efficiency and stability are effectively improved. The insulating spacer layer not only can block external moisture and pollutants, reduce direct contact between the perovskite layer and the electron transport layer and prolong the service life of the cell, but also can inhibit internal ion migration and slow down performance degradation. By accurately regulating and controlling the thickness of the insulating spacer layer, charge transmission optimization and compound loss minimization are realized. An innovative technical path is provided for research and development of efficient and stable perovskite solar cells, and further development of the solar cell technology is expected to be promoted.

The invention relates to the technical field of lithium batteries, and discloses a silicon-based composite negative electrode material and a preparation method thereof, a lithium ion battery negative electrode plate and a lithium ion battery. The negative electrode material comprises a matrix, a carbon layer coated on the outer surface of the matrix and a graphene oxide sheet layer coated outside the carbon layer, the substrate is a silicon oxide SiOx, and 0 lt; xlt; 2; the weight ratio of the matrix to the carbon layer to the graphene oxide sheet layer is 1: (0.1-0.2): (0.2-0.3). The silicon oxide SiOx is coated on the substrate by the carbon layer, so that the direct contact between the substrate and an electrolyte can be reduced, the probability of side reaction can be reduced, the formation of a stable SEI interface and a graphene oxide sheet layer is facilitated, and the conductivity and cycling stability of the silicon-based composite negative electrode material can be improved; meanwhile, the lithium ion battery containing the silicon-based composite negative electrode material has a relatively low expansion rate, and the first-cycle coulombic efficiency and the cycle stability of the battery can be effectively improved.

The utility model discloses an efficient aluminum melting furnace which comprises an aluminum melting furnace body, one side of the inner wall of the aluminum melting furnace body is fixedly connected with a fixing plate, one side of the fixing plate is fixedly connected with a motor, the output end of the motor is fixedly connected with a disc, and one side of the disc is provided with an annular moving block. An annular moving block is arranged in the aluminum melting furnace body, a moving block is fixedly connected to one side of the annular moving block, a feeding box is arranged in the aluminum melting furnace body, one side of the feeding box is fixedly connected with the fixing plate, and the moving block is slidably connected with the feeding box. Through cooperation of the annular moving block and the rotating block, the limiting block moves in a reciprocating mode, continuous alternate feeding of the two sides of an aluminum block is achieved, instability and delay of manual feeding are avoided, production efficiency is greatly improved, direct contact between workers and high-temperature and harmful substances is reduced, work safety is improved, and the production cost is reduced. Meanwhile, the aluminum blocks in the feeding pipe well avoid heat loss, energy consumption is reduced, and energy cost is saved.

The utility model relates to a lock tongue drilling device which comprises a rack, a lead screw driving mechanism, a working bottom plate, a feeding guide rail, a material receiving air cylinder, a material receiving sliding block, a feeding air cylinder, a material pushing block, a discharging air cylinder, a push rod, a positioning block, a drilling device and a material pressing air cylinder. The positioning block is provided with a workpiece groove used for positioning the spring bolt, the rear side of the workpiece groove is provided with a through hole used for the push rod to stretch in, the front side of the workpiece groove is provided with an opening used for the spring bolt to enter, and the right side of the working bottom plate is provided with a product outlet. According to the device, the full-automatic process from automatic receiving of the spring bolt to drilling machining to output of a finished product is achieved, manual operation links are greatly reduced, the labor cost is reduced, meanwhile, the working bottom plate is driven to move front and back through the lead screw driving mechanism, multiple hole positions on the side face of the spring bolt can be drilled at a time, and the machining efficiency is improved. And the processing efficiency of the spring bolt is greatly improved.

The invention discloses a mesenchymal stem cell membrane coated kaempferol bionic nano-drug as well as a preparation method and application thereof, and relates to the technical field of targeted drug preparation, the bionic nano-drug is composed of nano-particles containing kaempferol and a mesenchymal stem cell membrane coated outside the nano-particles, the mesenchymal stem cell membrane is derived from umbilical cord mesenchymal stem cells; the particle size of the bionic nano-drug is 167.67 + / -1.84 nm, the PDI is 0.181 + / -0.027, the potential is-5.41 + / -0.74 mV, the encapsulation efficiency is 79.97 + / -0.19%, and the entrapment rate is 7.27 + / -0.02%. According to the invention, the water solubility of the kaempferol is enhanced, the specific enrichment of the kaempferol at the diseased region of the AS can be enhanced, the utilization efficiency of Kae is improved, and the defects of small molecular drugs are overcome; in addition, through nanocrystallization of Kae, direct contact of cells and tissues with Kae can be reduced, and cytotoxicity is reduced.

The invention relates to the technical field of lubricants, in particular to a low-osmotic-pressure hyaluronic acid lubricant and a preparation method thereof. The low-osmotic-pressure hyaluronic acid lubricant disclosed by the invention is prepared from the following materials in parts by weight: 88.35 to 92.97 parts of purified water, 4 to 6 parts of modified polyvinyl alcohol, 2 to 5 parts of 1, 2-propylene glycol, 0.1 to 1 part of sodium hyaluronate, 0.01 to 0.1 part of aloe extract, 0.01 to 0.1 part of snail stock solution, 0.01 to 0.1 part of herba centellae extract, 0.05 to 0.06 part of phenoxyethanol, 0.45 to 0.55 part of ethylhexylglycerin and 0.01 to 0.03 part of lactic acid. The lubricant obtained by the preparation method disclosed by the invention can effectively improve the lubricating property and prolong the service life; by means of accurately controlling the dosage and proportion of each component, optimizing the preparation process and the like, multiple advantages of low osmotic pressure, moisturizing and lubrication, skin friendliness, stability, safety and the like are realized, the requirements of different crowds can be met, and comfortable use experience is provided.

The invention provides chiral photonic crystal toner as well as a preparation method and application thereof. The chiral photonic crystal toner is composed of chiral photonic crystal particles and a luminous substance loaded on the chiral photonic crystal particles, the preparation method comprises the following steps: mixing a liquid crystal polymer monomer, a chiral dopant and a luminescent substance, polymerizing to obtain a luminescent substance-loaded chiral photonic crystal polymer film, and crushing to obtain the chiral photonic crystal toner, the chiral photonic crystal particles have chiral structural colors, and the chiral structural colors are generated in a chiral photonic forbidden band. The chiral photonic crystal toner provided by the invention has the characteristics of chiral structural color and circular polarization luminescence, and can greatly improve the security of information anti-counterfeiting encryption when being applied to an anti-counterfeiting technology.

The utility model relates to the technical field of cooling and shaping equipment, and discloses cooling and shaping equipment for plastic products, which comprises a cooling mechanism, a placing mechanism and an external mechanism, the placing mechanism is positioned at the upper end of the cooling mechanism, the external mechanism is positioned outside the cooling mechanism, and the cooling mechanism comprises a cooling table. A cavity is formed in the inner wall of the cooling table, a cold water pool is arranged at the lower end of the cooling table, and a water pump is arranged at the right end of the cold water pool. Water in the cold water pool is cooled by starting the semiconductor chilling plate, and cold water in the cold water pool is conveyed into the cavity of the cooling table by matching the water pump with the water pumping pipe and the water supply pipe, so that the cold water cools a plastic product in a mold in the cavity; and water is discharged into the cold water pool through the water outlet pipe to be circulated, so that the cooling efficiency of the plastic products is improved, and water resources are recycled.

The invention discloses stamping equipment suitable for automatically replacing a die for automobile production, which comprises a bottom plate, a die body and a stamping equipment body, a pair of placing plates which are movably matched, a driving structure used for driving the placing plates to move and a stamping position adjusting assembly used for bearing the stamping equipment body to move and adjust are arranged above the bottom plate, the die body is arranged on the placing plates, and pressing buckle assemblies used for positioning the die body are arranged on the peripheries of the placing plates. A guide rod is fixedly connected to the inner side wall of the placing plate on one side, and a guide groove matched with the guide rod is formed in the inner side wall of the placing plate on the other side. The two sets of containing plates are combined more stably, deviation caused by external stress is reduced, automatic downward pressing adaptation can be conducted when the die body is replaced through the pressing buckle assembly, replacement is easy and convenient, adjustment and fixation can be conducted when materials are punched through the punching position adjusting assembly, and the punching process is conducted stably.

The invention relates to a box girder steel reinforcement framework closed ring forming welding device and method, the device comprises a steel reinforcement butt welding machine, the steel reinforcement butt welding machine comprises a movable clamping seat and a fixed clamping seat, and a butt welding area is arranged between the movable clamping seat and the fixed clamping seat; the positioning mechanism comprises a positioning frame, a driving cylinder, a rack, a side clamping seat, a front clamping seat and a rear clamping seat; a cylinder body of the driving cylinder is fixed on the positioning frame, a driving seat is arranged at the front end of the driving cylinder, racks are fixed on two sides of the driving seat, and the racks are adaptively positioned and slidably sleeved on the positioning frame; the racks on the two sides are meshed with corresponding gears, rotating shafts of the gears on the two sides are in transmission connection with left-hand thread screws extending towards the two sides, side clamping bases are arranged on the upper portions of the two sliding sleeves, and side clamping areas are formed. And the front clamping seat and the rear clamping seat correspond to each other and are respectively positioned on the outer side and the inner side of the butt welding area. A positioning tool is provided for the butt welding forming process of the rectangular steel reinforcement framework, and the consistency and reliability of welding quality are ensured through a positioning system and a clamping system.

This application relates to a sample pretreatment system, comprising: a gripping device for holding the cap of a sampling tube; a capping device for holding the tube body of the sampling tube and for rotating the tube body while the gripping device holds the cap to open or close the cap; a liquid injection device for injecting organic solvent into the tube body held in the capping device and containing the sample to be tested, to obtain a mixture; a mixing device for mixing the mixture in the sampling tube; a centrifugation device for centrifuging the mixed mixture in the sampling tube to obtain a supernatant; a filtration device for filtering the supernatant to obtain a filtrate; a pipette device for drawing at least a portion of the supernatant from the sampling tube into a pipette or injecting the supernatant from the pipette into the filtration device; and a transport device. This application improves processing efficiency and ensures the consistency of pretreatment results.

The utility model discloses an anorectal drug delivery device which comprises a drug delivery tube and an injection tube connected with the drug delivery tube in an inserted mode, one end of the drug delivery tube is a closed end, a plurality of protruding rings are connected to the tube wall of the drug delivery tube at intervals in the length direction, a drug delivery hole is connected to the tube wall between every two adjacent protruding rings, and an isolation sleeve is arranged in the drug delivery tube. One end of the isolation sleeve is connected with the inner wall of the dosing tube through a connecting part, the other end of the isolation sleeve extends towards the closed end, and the dosing holes are formed between the closed end and the connecting part. By arranging the convex rings, when the dosing tube is inserted into the anorectum, the direct contact between the inner wall of the anorectum and the dosing hole can be reduced as much as possible through the convex rings; meanwhile, the isolation sleeve is arranged, so that the medicine flows through the inner wall of the closed end to be buffered, then flows into the gap between the isolation sleeve and the administration tube and then flows out of the administration hole in the administration process, the medicine pushing-out speed can be effectively reduced, stimulation to the anorectum is reduced, and the discomfort of a patient is further reduced.

This invention provides a nitrogen filling needle structure for vials, comprising a filling needle body, a first through hole penetrating its upper and lower end faces, and a filling needle body gas chamber inside the filling needle body; a top connector communicating with the first through hole at the upper end of the filling needle body; a second through hole penetrating its bottom end face at the bottom of the filling needle body, communicating with the filling needle body gas chamber; a first vent hole on the filling needle body, through which high-pressure gas passes sequentially via the top connector, the first through hole, the second through hole, and the first vent hole; a cap is fixedly installed on the bottom end face of the filling needle body at the top, with an opening at the bottom of the cap, and an annular rubber ring is provided on the inner wall of the cap, the annular rubber ring communicating with the interior of the filling needle body. This invention provides a nitrogen filling needle structure for vials, which can effectively prevent contamination of the liquid inside the vial during nitrogen filling, thereby improving the yield of finished products.

The utility model relates to a kind of steel ring separating devices, including support, take device;The take device is set on the support;Support is provided with support plate;Slidingly connected with slide on the support plate;First clamping piece is provided on the slide;The two sides of the slide are provided with second clamping piece;First pusher is provided on the support plate;The first pusher drives the first clamping piece to have stroke on the support plate;The clamping end of the first clamping piece is provided with first jaw;The clamping end of the second clamping piece is provided with second jaw;The length of the first jaw is shorter than the length of the second jaw.Solved traditional circular steel wire-like steel ring separation difficult, easily damaged, need to adapt annular layered antiskid device.

The utility model relates to a coastal area fire pool structure, a main body is a fire pool, the side wall of the fire pool is provided with a water inlet pipe extending out of the fire pool, and the water inlet pipe is connected with a floating ball valve; an isolation chamber is defined in the fire pool through an enclosing wall, and the floating ball valve and the water inlet pipe are arranged in the isolation chamber; the bottom of the isolation chamber is provided with a water outlet communicated with the fire pool; and the top of the isolation chamber is detachably connected with a cover plate. The isolation chamber is used for protecting the floating ball valve from sea wind erosion, the cost can be saved, the opportunity that chloride ions and other corrosive substances directly make contact with the floating ball valve can be effectively reduced, and therefore the corrosion process of stainless steel is delayed, and the service life of the floating ball valve is greatly prolonged.

The utility model provides a segmented cutting forming tool of tricholoma matsutake. The segmented cutting forming tool of tricholoma matsutake includes: the workbench that sets up the inclined groove, the fixed plate is fixedly installed in the inclined groove, the cutting frame is hinged on the fixed plate, and the bottom rotation of cutting frame is installed with the winding shaft, the protective cover is fixedly installed on the cutting frame and is connected with the winding shaft rotation, the torsional spring is fixedly installed in the protective cover and is connected with the winding shaft, the cutting line one end is coiled on the winding shaft, the movable plate is slidably installed on the cutting frame, and the movable plate is fixedly connected with the other end of cutting line. The segmented cutting forming tool of tricholoma matsutake has the advantages that the efficiency of segmented cutting of tricholoma matsutake can be improved, and the production needs are met.

The invention discloses an automatic turnover device for a numerical control machining clamp, and relates to the technical field of numerical control machining, the automatic turnover device comprises a mounting table, a bearing plate is rotatably mounted on the mounting table, a rotating shaft is rotatably mounted on the bearing plate, the included angle formed by the extending direction of the rotating shaft and the rotating direction of the bearing plate is 90 degrees, and the rotating shaft is rotatably mounted on the mounting table; a connecting disc is mounted at the front end of the rotating shaft, and a clamp is arranged on the connecting disc; wherein the bearing plate is provided with a shaft hole for the rotating shaft to penetrate through, the rotating shaft is provided with a plurality of gas flow channels extending along the axis of the rotating shaft, and each gas flow channel is provided with a gas inlet end and a gas outlet end. Through cooperative work of the gas flow channel, the sealing ring, various adjusting components, the transmission assembly, the protection structure and the like, abrasion of the rotating shaft and the shaft seat is reduced, the machining cost is reduced, the service life of the components is prolonged, and the stability and reliability of the device are improved.

This utility model discloses a self-lubricating bearing ring for new energy vehicle transmission, including an outer bearing ring. A circulation pipe is snapped into a groove in the outer bearing ring, and the circulation pipe is tightly attached to a first groove, which is formed on a snap-fit ​​block. This utility model utilizes the fact that solid lubricant is typically embedded in the inner bearing ring material. During bearing operation, due to friction and temperature changes, the lubricant in the ring is gradually released to the friction surface. The lubricating film effectively reduces direct metal-to-metal contact, thereby reducing the coefficient of friction and wear rate. The lubricating film can also absorb some heat, helping to control the bearing temperature rise. The three-layer protection of the first, second, and third dustproof rings effectively prevents dust from entering, thus improving the bearing's lubrication efficiency and service life. The circulation pipe contains a heat-absorbing solution, which can significantly improve the heat dissipation capacity of the outer bearing ring, slowing down bearing material fatigue and performance degradation.

The utility model relates to the technical field of handles, in particular to a multi-angle conversion handle which comprises a handle seat and the like. The screw is movably arranged on one side of the handle seat, one end of the screw extends into the handle seat and is connected with the handle body, the handle body is movably connected with the handle seat, and the elastic piece is arranged at the end, extending into the handle seat, of the handle body. The end, away from the handle body, of the elastic piece is fixedly connected with the steel ball, and the steel ball abuts against the inner wall of the handle base. Through the design of parts such as the screw and the handle body, the angle can be adjusted according to needs, higher flexibility and convenience are provided, the requirements of different users and using scenes are met, meanwhile, the steel balls connected with the elastic pieces slide in the handle base, friction force feedback is provided, and the safety of the handle is improved. A user can clearly perceive the rotation angle of the handle body, and the operation feeling is enhanced.

The utility model relates to the technical field of open wrenches, in particular to a rust-proof wrench which comprises a handle, a push block is slidably connected in the handle, a wrench body is fixedly connected to one end of the push block, a wrench head is arranged at one end of the wrench body, and a protective cover is slidably connected to one end of the handle. A high-density sponge is arranged in the protective cover, an oil cavity is formed in one end of the protective cover, a plurality of oil outlet holes are formed in the side, close to the high-density sponge, of the oil cavity in a penetrating mode, a push plate is slidably connected into the oil cavity, and a screw rod is fixedly connected to one end of the push plate. According to the utility model, the wrench head with the retractable handle is designed, so that the contact with the outside is reduced, and the rusting risk is reduced. Meanwhile, due to the design of the oil drainage cavity in the cover, the wrench head can be conveniently and uniformly oiled, the anti-rust operation is simplified, the use amount of oil and uniform smearing are ensured, and the anti-rust effect is improved.

The embodiment of the present invention discloses a solid-state battery and a preparation method and an electric device. The solid-state battery includes a lithium metal sheet, a solid electrolyte layer, and a modified layer arranged between the lithium metal sheet and the solid electrolyte layer, wherein the modified layer includes lithium fluoride; wherein, when two different regions of the modified layer are tested by EDS, the difference between the content of lithium fluoride in the first region and the content of lithium fluoride in the second region is less than or equal to 10%, and the lithium fluoride modified layer can reduce the direct contact between the solid electrolyte and the metallic lithium and reduce the interface impedance. At the same time, the lithium fluoride uniformly distributed in the modified layer can better induce the uniform deposition of metallic lithium and avoid the growth of lithium dendrites, thereby improving the utilization rate and cycle life of the solid-state battery.

The invention discloses a bio-based submerged plant fiber planting blanket and a preparation method thereof, and belongs to the technical field of fiber planting blankets, the bio-based submerged plant fiber planting blanket comprises a bearing layer and a matrix layer, the matrix layer comprises the following raw materials by mass fraction: 90-95% of a biomass matrix, 4-8% of urea slow-release particles and 1-3% of minerals; the urea sustained-release particle is of a core-shell structure, a core material is a gel particle loaded with urea, and a wall material is a beta-cyclodextrin and sodium hyaluronate compound. The main raw material of the substrate layer is a biomass substrate, the substrate layer has good air permeability and water-retaining property, nutrients contained in the substrate layer can nourish the growth of the cultivated submerged plants, and a good supporting structure is provided for the substrate layer. The urea slow-release particles are added, so that nutrient elements beneficial to growth can be slowly released in the growth process of the submerged plants, the problems of excessive absorption in the initial stage and lack in the later stage caused by a traditional quick-acting chemical fertilizer are solved, the survival rate of the submerged plants is increased, and the effect of quickly repairing the ecological system of a water body is achieved.

The utility model relates to the technical field of wing blades, in particular to an improved wing blade structure which comprises a wing blade body, the wing blade body is composed of an upper L-shaped plate, a lower L-shaped plate and a blocking plate, the upper L-shaped plate, the lower L-shaped plate and the blocking plate are welded and fixed, the lower L-shaped plate wraps the inner side of the upper L-shaped plate and is connected with the upper L-shaped plate, and the blocking plate is connected with the lower L-shaped plate. The blocking plate is welded to the end of the joint of the upper L-shaped plate and the lower L-shaped plate, and the surface of the upper L-shaped plate and the surface of the blocking plate are coated with a first protection plate and a second protection plate correspondingly. According to the improved wing blade structure, the protection plate I and the protection plate II which are made of stainless steel are welded on the surfaces of the upper L-shaped plate and the blocking plate, so that the direct contact between the wing blade and a corrosive material is effectively reduced, the corrosion resistance of the wing blade in a severe environment is remarkably enhanced, and the service life of the wing blade is prolonged; and the hardness and wear resistance of the stainless steel material are superior to those of a traditional manganese steel plate, abrasion of the material to the wing blades in the operation process can be effectively reduced, the equipment maintenance cost is reduced, and the equipment operation efficiency is improved.