294results about How to "From erosion" patented technology

A floating type wave power generation system is characterized in that the system consists of eight sets of lever-type floating bodies and a hydraulic energy accumulation converter with the hydraulic pump function. On a floating workbench 7, eight sets of levers 2 and a floating body 1 are connected through supporting hinge bearers 10 and 11; in this way, the highly undulating displacement caused by waves can be converted to relatively lesser displacement of a piston rod 4, and the minor force that the floating body bears can be converted through the lever to the major force on the piston rod. The piston rod drives a hydraulic tank 3 to switch and transmit the hydraulic energy through a connecting oil pipe5, a high-pressure oil pipe6, a hydraulic oil tank and four no-return valves of each set to a hydraulic motor in a hydraulic power generation control chamber 9; in this way the generator is driven to work. The present system can absorb, convert and accumulate the intermittent unstable wave energy in a highly effective way and can buffer the destructive effect of waves. The floating platform can be suitable to different marine space by adjusting the length of an anchor chain 8. And in various sea conditions, kinetic energy and potential energy possessed by waves in the sea surface can be converted and accumulated as hydraulic mechanical energy by utilization of the wave drop; thus the generator is driven to unremittingly provide electric power.

A basement engineering waterproof and drainage method is provided. The wall footing of the outside wall in basement engineering is embedded in watertight or micro-watertight soil rock layer or cement soil layer. The wall footing intercepts water by a thin-part structure. The cushion of the basement engineering soleplate and the falling layer of the top board are composed of combined water-proof layers. The late poured band, the movement joint and the horizontal construction joint at the lower part of the outside wall are treated by a water-proof structure combined with waterproofing measures. The basement engineering is provided with a drainage system. The groundwater and surface water at the soleplate are drained into city drainage pipelines via a soleplate part of the drainage system. The rainwater of overburden layer bottom of the top board is then drained into city drainage pipelines via the indoor part of the drainage system. The invention is designed by adopting a one-body method of arranging the basement engineering waterproofing, drainage and anti-floating as well as underground engineering space enclosing structure and pipelines, thereby shortening the construction period, reducing the engineering cost, increasing the durability and reliability of underground building space enclosing structure and waterproof layer as well as pipelines.

The invention discloses a method for preparing a silicon-free or low-silicon acidproof ceramic fracturing propping agent, which comprises the following steps of: (1) preparing the following raw materials in percentage by weight: 30 to 95 percent of alumina, 5 to 70 percent of barium carbonate and 0 to 10 percent of sintering aid, wherein the sintering aid is one or more of titanium dioxide, boric acid, calcium carbonate, magnesium oxide and dolomite; (2) performing ball milling on the raw materials in the step (1) in a ball mill for 24 to 48 hours; (3) preparing the raw materials obtained in the step (2) into semi-finished product particles; and (4) sintering the semi-finished product particles obtained in the step (3) at the temperature of between 1,500 and 1,800 DEG C for 1 to 3 hours, and cooling to the room temperature. The method has simple process; the barium carbonate is decomposed at high temperature to generate barium oxide, and the barium oxide is fully reacted with alumina to generate stable barium aluminate; and the barium aluminate has strong acidproof performance and protects other components in the finished product against corrosion of acid liquor, so the acidproof performance of the finished product is greatly improved.

The invention discloses an iron-cobalt-nickel-copper-based high-entropy alloy water electrolysis catalytic material and a preparation method thereof, and belongs to the technical field of composite material preparation. The water electrolysis catalytic material is composed of a reaction active matter and a carrier, wherein the reaction active matter is iron-cobalt-nickel-copper-tin, iron-cobalt-nickel-copper-manganese, iron-cobalt-nickel-copper-vanadium and other iron-cobalt-nickel-copper-based high-entropy alloy nanoparticles, and the carrier is a carbon nanofiber material prepared through anelectrostatic spinning method. The prepared water electrolysis catalytic material has a high specific surface area, diffusion of electrolytic solution and desorption of gas are facilitated, hydrogenand oxygen can be produced under an alkaline condition, and the hydrogen production rate under high voltage is far higher than that of a 20% Pt/C electrode; and carbon nanofibers can effectively protect the high-entropy alloy nanoparticles from being eroded by an electrolytic solution, so that the catalytic material is endowed with good stability.

The invention discloses an organic electrolyte comprising the following components in percentage by weight: 2%-5% of lithium chloride, 5%-8% of gamma-butyrolactone, 2%-5% of ethylene glycol, 0.1%-10% of phenyl surface active agent and balance of absolute ethyl alcohol. The invention also discloses a method for extracting non-metallic inclusions from steel. The method comprises the following steps: preparing the electrolyte, sleeving a microporous cellulose acetate plastic bag on the periphery of a steel sample to electrolyze the steel sample, and separating the inclusions in ultrasonic vibration and vacuum filtration manners. The organic electrolyte is environmentally friendly and low in toxicity. By utilizing the organic electrolyte, body injury to operation staff is obviously reduced, electrolysis time is shortened by accelerating electrolysis through an external magnetic field, the problem that a large number of iron and inclusions of iron and inclusions are difficult to be separated from the anode mud is overcome, and the non-metallic inclusions are accurately and roundly extracted with use of the cellulose acetate plastic bag.

The invention relates to a method for river course slope protection by using composite stream constructed wetlands, comprising the following steps that: (a) grass planting ditches with V-shaped cross section are dug on a slope surface, and plants are planted in the grass planting ditches; (b) a composite stream constructed wetland in which fillers are provided is set at the water outlet of the grass planting ditch, and one or more plants selected from reeds, cattail, sedge, Sparganium, Juncus, canna, metasequoia, calamus, Scirpus tabernaemontani, arrowheads, Aponogetonaceae grass, Alternanthera sessilis, cress or sedge are planted on the fillers; (c) a water outlet pipe is arranged at one side of the composite stream constructed wetland adjacent to the river course so that water flowing from the composite stream constructed wetland is drained into the water course. The method for river course slope protection by using composite stream constructed wetlands has the advantages of good stability of slope protection to water courses, little damage to ecological environment keeping at both sides of rivers, capability of beautifying riparian landscape and adding biological diversity, low cost and favorable pollution interception and purification effects.

The invention relates to an energy-dissipating and collision-preventing combined device of a floating composite pier, which is characterized by at least comprising an internal layer corrosion-preventing ring (16) arranged along the pier, wherein the internal layer corrosion-preventing ring (16) comprises a plurality of composite lattice pouring jackets (17) arranged around the pier, the composite lattice pouring jackets (17) are connected to form an integrated structure through longitudinal composite presstressed reinforcing steels (6) and transverse composite presstressed reinforcing steels (7), the side of each composite lattice pouring jacket (17) is provided with an anchor head (10), the upper surface and the lower surface of each composite lattice pouring jacket (17) are both embedded with embedding pieces (11) connected with the adjacent composite lattice pouring jackets (17); part or all of the composite lattice pouring jackets (17) forming the internal layer corrosion-avoiding ring (16) are connected with pulleys (13); the joint of the adjacent composite lattice pouring jackets (17) is provided with a sealing body; and one surface of each composite lattice pouring jacket (17) contacting with water is provided with a wave-dissipating hole (15). Compared with the traditional steel pouring jacket, the invention has better shock resistance and durability, light weight, and convenient installation and repair, can save materials, and shorten the construction period.

The invention discloses a water electrolysis catalysis material having a palladium-nickel nanometer alloy structure, wherein the water electrolysis catalysis material comprises a catalytic active material and a carrier, the catalytic active material is palladium-nickel alloy nanoparticles, and the carrier is ultrafine carbon fiber. The water electrolysis catalysis material of the present invention has high specific surface area and high porosity, is conducive to the electrolyte diffusion and the gas desorption, and provides the large contact area between the electrolyte and the catalytic site.

The invention discloses a prefabricated assembly FRP-reinforcing steel-bar-concrete combined bridge deck and a construction method. The prefabricated assembly FRP-reinforcing steel-bar-concrete combined bridge deck comprises a semiclosed FRP groove and concrete inside the FRP groove, wherein the bottom surface and two side surfaces of the concrete are wrapped by the FRP groove to form the combined panel, a transverse through reinforcing steel bar reserved tunnel is formed in a transverse setting position of the combined panel, a transverse prestress reinforcing steel bar is arranged in the reinforcing steel bar reserved tunnel to connect a plurality of FRP-concrete combined panel prefabricated components to form an integral bridge panel structure in a needed size. The construction method comprises the steps: firstly producing the semiclosed FRP groove; arranging an FRP rib and an embedded corrugated pipe, and fixing the FRP rib and the embedded corrugated pipe; pouring concrete; splicing a plurality of prefabricated FRP-concrete combined deck components into a whole by utilizing the prestress after the strength of the concrete reaches the requirement. The factorization prefabrication and on-situ assembling of the FRP combined bridge deck are realized, the structure is simple, and the construction is convenient.

A strengthening method for a gob-side entrydriving narrow coal pillar comprises the steps that firstly, an ultra-long horizontal drill hole and top and bottom plate inclined drill holes are drilled in the narrow coal pillar inside an upper section mining roadway, the length of the ultra-long horizontal drill hole is larger than the width of the narrow coal pillar. A grouting off target prevention bag and horizontal and inclined grouting anchor rods are installed inside each drill hole. A unilateral cable-stayed anchoring system, a unilateral transverse side limiting strengthening device and a unilateral gob-side entrydriving opposite-pulling anchoring system are formed on one side of the mining roadway, after a lower section roadway to be dug is dug, machinable rods are cut off in the lower section gob-side dug roadway, a butt-joint short anchor rod, a cable-stayed anchoring system and a transverse side limiting reinforcing device are correspondingly installed on the other side of the narrow coal pillar, finally, grouting is performed on the grouting anchor rods, and prestressing force is applied to nuts. Safety and stability of the narrow coal pillar gob-side entrydriving are effectively ensured, roadway deformation is effectively reduced, a coal pillar plastic area is obviously reduced, and the roadway repair cost can be lowered. The structural design is reasonable and simple, construction is convenient, the strengthening effect is obvious, and the coal recovery ratio is increased.

The invention discloses a cobalt-nitrogen co-doped carbon-based electrocatalyst material and a preparation method thereof, and belongs to the field of electrochemistry and new energy, wherein the cobalt-nitrogen co-doped carbon-based nano material is prepared by taking an anionic metal organic framework encapsulated with metal cobalt ions as a precursor through a high-temperature pyrolysis methodin a nitrogen atmosphere, and has excellent oxygen reduction, oxygen evolution and hydrogen evolution catalytic performances under an alkaline condition. According to the invention, a rechargeable zinc-air battery and a full water splitting device assembled by utilizing the material have good charging and discharging performance and long-term stability; and the preparation process is simple, and the catalyst is good in performance, economical and capable of being prepared on a large scale.

The invention discloses an electrocatalytic material loaded with vanadium-cobalt alloy nanoparticles and a preparation method of the electrocatalytic material, and belongs to the technical field of composite material preparation. The carbon nanofiber-supported vanadium-cobalt alloy nanoparticle catalytic material for water electrolysis is prepared by loading a vanadium source and a cobalt source onto an ultrafine fiber carbon precursor by utilizing an electrospinning method, performing pre-oxidation, and performing reduction; and the catalytic material for the water electrolysis is composed ofreaction active matter and a carrier, wherein the reaction active matter is a vanadium-cobalt alloy nanoparticles, and the carrier is a carbon nanofiber material prepared by the electrospinning method. The catalytic material for the water electrolysis prepared by the method has a high specific surface area, thereby facilitating electrolyte diffusion and gas desorption; hydrogen evolution can be performed under acidic and alkaline conditions, and the hydrogen production speed under large voltage is much higher than that of a commercial Pt/C electrode; and in addition, the catalytic material for the water electrolysis prepared by the method does not need to coat an electrode, and can be directly used as an electrode for electrolyzing water.

The invention provides a damp-proof charging pile. The charging pile descends into a containing cavity when not in use, a rain shed is arranged above the charging pile so that the charging pile can be protected against rain erosion, and besides, the containing cavity has a waterproof function, and the damp-proof performance of the charging pile is further improved. The rain shed is further provided with a solar cell panel and a lightning conductor, solar energy can be converted into charging electric energy, the charging pile is quite environmentally friendly, and meanwhile, lightning attacks can be avoided. The damp-proof charging pile provided by the invention is good in performance and long in service life.

The invention discloses a moisture-preserved grass-proof ecological mat and a manufacturing method thereof. The mat comprises a branch shredded solidified material and a biodegradable mulching film used for covering the branch shredded solidified material. The central portion of the branch shredded solidified material is provided with a via hole used for a trunk of a sapling to pass. The biodegradable mulching film is provided with a through hole corresponding to the via hole in the position. The branch shredded solidified material is rectangular or rounded or polygonal. The biodegradable mulching film comprises an upper biodegradation film and a lower biodegradation film. The biodegradation time of the upper biodegradation film is longer than that of the lower biodegradation film. The biodegradation time of the upper biodegradation film is 3-5 years and the biodegradation time of the lower biodegradation film is 1-2 years. The moisture-preserved grass-proof ecological mat and the manufacturing method thereof have the advantages of being wide in application range, broad in application prospect, obviously moisture-preserved, water-conserved, warm and grass-proof, and greatly improving the survival rate of afforestation.

The invention discloses a slope protection method and structure based on an earthwork standard room and a mixture of fiber and clay. The slop protection method comprises the steps that 1 the slope plane of the slope is leveled, and the earthwork standard room is paved on the slope plane; 2 the clay is crushed, then polypropylene fiber, fertilizer and water are added, and stirring is conducted till the mixed materials are in a liquid plastic state; 3 the mixed materials are paved on the slope plane of the slope and is floated; 4 grass seed is sown on the slope plane in a spraying mode, a protection geomembrane is covered, and then artificial protection is conducted. The slope protection method and structure based on the earthwork standard room and the mixture of fiber and clay have the advantages that multiple functions of anti-washing, anti-infiltrating, conserving water, keeping warm, facilitating the growth of plants and the like are possessed, the slope plane can be protected from being eroding and infiltrating of rain before a turf is formed, and the purposes of strengthening the slope and beautifying the environment are achieved.

The invention discloses a nanometer platinum-copper alloy catalytic material for electrolysis of water. The nanometer platinum-copper alloy catalytic material for electrolysis of water is prepared by using electrospinning technique and chemical vapor deposition; platinum-copper alloy nanoparticles are uniformly dispersed on carbon nanofibers, and the nanoparticles are free of obvious agglomeration, small in particle size and uniform in distribution and have a great number of active sites, thereby improving the catalytic activity of the material; and a preparation method for the nanometer platinum-copper alloy catalytic material is simple in process flow, free of production of toxic substances, friendly to environment, free of pollution and good in repeatability, and has good industrial application prospect.

The invention relates to a transition metal oxide positive electrode material of lithium as well as a preparation method of the transition metal oxide positive electrode material. The transition metal oxide of the lithium is composite oxide with a layer of amorphous material covering the surface of a bulk phase material, the chemical constitution of the transition metal oxide is (1-w1-w2)Li<1+x>NiyMzMn<2-y-z>O<4-delta>.w1Li2CO3.w2LiOH, wherein Li<1+x>NiyMzMn<2-y-z>O<4-delta> is the bulk phase material, the bulk phase material has a spinel structure, and Li2CO3 and LiOH are respectively amorphous surface layer substances. The positive electrode material has a lithium intercalation and deintercalation electrode potential being more than or equal to 4.0V(vs.Li/Li<1+> and a theoretical mass specific capacity being more than 120mAh/g; the material is excellent in cycling stability and high-temperature stability.

The invention belongs to the field of prevention and treatment of crop disease damage and particularly relates to a compound composition for biologically preventing and treating crop wilt and application thereof. The compound composition for biologically preventing and treating crop wilt comprises an organic fertilizer and strain powder having a weight ratio of 100:1 to 20:1. The compound composition is applicable to various crops with high wilt attack frequency in agricultural planting, such as common banana and dwarf banana. The compound composition for biologically preventing and treating crop wilt and application thereof have the advantages that the cost is low, the prevention and treatment stability is good, disease resistance rarely occurs, the advantages of biological prevention andtreatment are made full use, prevention and treatment effect is improved, daily management for crop cultivation is improved, and economic loss and prevention and treatment cost are reduced.

The invention relates to a broadband absorbing material based on a frequency selective surface and sandwich structure design and a preparation method thereof. On the basis of combination of a frequency selective surface and a sandwich structure, the advantage of widening the absorbing band of the frequency selective surface is utilized and the frequency selective surface is protected from being corroded by a high-temperature aerobic environment. According to different environmental usage requirements like the temperature or bearing requirement, different dielectric layer materials are selectedpreferably and the corresponding preparation processes are optimized, so that the application field of the absorbing material is widened. Besides, the intermediate electromagnetic wave loss layer isa frequency selective surface film based on multi-loss-mechanism coordination with compatibility of conductivity losses and polarization losses instead of the traditional frequency selective surface.On the basis of the macro-scale structural design and micro-scale frequency selective surface film optimization and regulation, the frequency width of the reflection loss <-10dB of the material is 8 to 18 GHz. Moreover, the preparation method of the broadband absorbing material is simple and has high designability; the performances are stable; the applicability is high; and the broadband absorbingmaterial and the preparation method thereof have the development prospects.

The invention belongs to the technical field of oil and gas drilling and particularly relates to an underground gas cut monitoring system based on ultrasonic waves. The monitoring system comprises anultrasonic gas cut monitoring device fixed on a drill rod and an annular gas-solid separation device located below the ultrasonic gas cut monitoring device; and the annular gas-solid separation devicecomprises a turbine and a gas-solid pre-separation device which are sequentially fixed on the drill rod from top to bottom. The underground gas cut monitoring system based on ultrasonic waves can effectively separate gas cut gas and rock debris in the well, eliminate the influence of the rock debris on gas cut monitoring, and also can enable the gas cut gas in the whole annular space to be concentrated in an effective monitoring window near the drill rod as far as possible, thereby solving the problem that a current underground gas cut monitoring method is limited by the space of the monitoring window and influenced by the rock debris, and greatly improving the timeliness, precision and reliability of gas cut monitoring.

The invention relates to intelligent transfer equipment for transport of a drilling machine. The intelligent transfer equipment comprises a vehicle head, a carriage and two driving mechanisms. The vehicle head is connected with the carriage. The two driving mechanisms are arranged under the vehicle head and the carriage correspondingly. According to the intelligent transfer equipment for transport of the drilling machine, the angle of a base in the transfer equipment is measured by an angle measuring mechanism, a support plate is kept in a horizontal angle through a lifting unit, and thus drilling machine components on the support plate are kept in a horizontal angle and prevented from sliding off. In addition, through rotation of a third driving motor, a clamping plate is driven to descend, thus two flashing boards get close to each other, a flashing cover is formed, the drilling machine components are protected against rain erosion and prevented from rusting damage, so that the practicability of the intelligent transfer equipment is improved.