411 results about "Erosion resistance" patented technology

The invention provides a concrete super-early-strength quick-hardening material, and relates to the field of building materials. The high-strength concrete comprises the following components in percentage by mass: 40%-50% of calcium aluminate, 30%-40% of gypsum, 8%-15% of high aluminum, 1%-3% of an additive, 3%-12% of an exciting agent and 1%-5% of an auxiliary material. According to the super-early-strength quick-hardening material provided by the invention, hour-level strength can be quickly and stably improved, and the strength increasing curve of each age is smooth and stable, so that the requirements of scenes such as road repair and tunnel construction on early strength can be met; it can be guaranteed that the 28-day compressive strength of the material breaks through 70 MPa, the later strength is kept stable, and the long-term safety of an engineering structure is guaranteed; the anti-seepage, anti-freezing and anti-erosion capabilities are realized in a complex environment, the service life of a project can be effectively prolonged, and the maintenance cost is reduced. In addition, the invention further provides a preparation method of the concrete super-early-strength and quick-hardening material, and the preparation method is used for preparing the super-early-strength and quick-hardening material provided by the invention.

According to the MoSi2 coating erosion rate prediction method based on the particle collision theory, a MoSi2 coating erosion rate prediction model is constructed based on the particle collision theory, and the dynamic damage process of a MoSi2 coating is simulated through a test measurement set obtained by carrying out a particle-containing high-temperature combustion gas flow erosion test. The mass loss of the MoSi2 coating formed under the erosion of the particle-containing high-temperature combustion gas flow is obtained, so that the prediction of the MoSi2 coating erosion rate prediction model is more accurate, and meanwhile, the limitation of a traditional erosion prediction model method on the characterization of a multi-factor coupling effect is broken through; in addition, the dynamic damage process of the MoSi2 coating is visualized by constructing a morphology graph prediction model, and a high-confidence-coefficient theoretical tool is provided for anti-erosion design of the MoSi2 coating.

The utility model relates to a continuous pipe, belongs to the technical field of oil and gas development, and particularly discloses a scratch-resistant and erosion-resistant flexible composite continuous pipe which comprises a central pipe, a transition layer, a reinforcing layer, a tensile layer and an outer protective layer which are sequentially arranged from inside to outside, and a wear-resistant and erosion-resistant epoxy resin inner coating is sprayed on the surface of an inner cavity of the central pipe. The outer protective layer is made of a scratch-resistant alloy steel material, so that the strength of the whole pipe is improved; the transition layer is made of nitrile rubber; the reinforcing layer and the tensile layer are formed by weaving composite material belts reinforced by special fiber belts, and a signal cable and a power cable are fixedly arranged in the reinforcing layer and the tensile layer respectively. The composite material continuous pipe can obviously improve the scratch resistance and the fluid erosion resistance of the inner wall, is beneficial to saving materials, improves the utilization rate of the existing composite material continuous pipe material, and is suitable for various oil and gas exploitation.

The invention provides a hot-state repairing material and a preparation method thereof, and belongs to the technical field of refractory materials. The hot-state repairing material provided by the invention is prepared from the following raw materials in percentage by mass: 87 to 98 percent of waste bricks, 0.5 to 4.5 percent of magnesium mineral micro powder, 0.5 to 5.0 percent of slag powder, 0.5 to 2.0 percent of dispersing agent, 0.2 to 1.5 percent of organic fiber and 0.1 to 0.5 percent of binding agent. According to the invention, waste bricks are used as aggregates, contain tiny pores, provide channels for reaction gas for heating the hot-state repairing material, and can be rapidly sintered with a furnace lining; the slag powder can be matched with the binder to improve the thermal adhesion rate of the thermal repairing material; the magnesium mineral micro powder can improve the reaction activity, and the dispersing agent assists the combination effect of the slag powder, so that the repairing material can be sintered through rapid reaction, and the compression strength and the erosion resistance are improved; and the organic fibers can form good filling among particles and fine powder, so that the compression strength and the erosion resistance are improved.

The invention discloses sulfate-erosion-resistant metakaolin-slag-based geopolymer concrete, belongs to the technical field of concrete, and aims to solve the problems that the corrosion resistance of traditional silicate concrete is ineffective and the adaptability of conventional alkali-activated concrete is insufficient in a special environment. The concrete comprises the following components in parts by weight: 60-90 parts of a cementing material, 120-170 parts of aggregate, 15-30 parts of a composite activator, 2-8 parts of a function regulator and the like, the cementing material is prepared from nano TiO2 / KH-550 composite modified metakaolin, slag and silica fume-coal gangue powder-HAP composite powder; the aggregate comprises modified limestone macadam (soaked and dried by a sodium dihydrogen phosphate solution) and river sand; the composite exciting agent comprises water glass, sodium hydroxide, sodium pyrophosphate, propylene glycol and the like; the function regulator comprises superfine fly ash, a naphthalene water reducer, HPMC (Hydroxy Propyl Methyl Cellulose) and boric acid. Through the synergistic effect of the components, the sulfate corrosion resistance, the mechanical property and the environmental adaptation performance of the concrete are improved, and the concrete is suitable for engineering construction under the service environment of high-concentration sulfate and the like.

The invention discloses a clay stabilizer for a high-temperature environment and a preparation method of the clay stabilizer, and belongs to the technical field of oil field oil extraction auxiliaries. The preparation method comprises the following steps: mixing and stirring quaternary ammonium salt modified silicon dioxide and modified acrylamide according to a mass part ratio of 1: (5-6) to obtain the clay stabilizer. The clay stabilizer is obtained by mixing quaternary ammonium salt modified silicon dioxide and modified acrylamide, so that not only is the anti-swelling performance improved, but also the scouring resistance is improved.

The invention discloses a soil erosion resistance prediction method and system based on earth surface parameters, and relates to the technical field of soil erosion and water and soil conservation monitoring and prediction, and the method comprises the steps of earth surface parameter collection, parameter preprocessing, erosion response modeling, erosion resistance threshold tensor inversion and erosion resistance prediction. Collecting multi-source earth surface parameter data; secondly, constructing a unified earth surface parameter feature set; obtaining erosion response simulation data by adopting an erosion response modeling method combining physical process simulation and lightweight machine learning residual correction; an explicit Bayesian neural network and a variational reasoning framework are constructed, observation data are combined, and a four-dimensional anti-corrosion threshold tensor is obtained through inversion; introducing a double-branch space-time multi-task fusion prediction model of an anti-erosion threshold tensor, and outputting a prediction value and a prediction grade of the soil anti-erosion capability; according to the scheme, dynamic and spatial prediction of the erosion resistance of the soil can be realized, and a scientific basis is provided for water and soil conservation and ecological environment management.

The invention discloses a preparation method of nano sepiolite fibers, which comprises the following steps: acidizing sepiolite by a hydrothermal synthesis method to enable the interior of the sepiolite to have mutually communicated holes, and loading SiO2 particles on the surface of the sepiolite to prepare the nano sepiolite fibers; the sepiolite is modified, the specific surface area of the sepiolite is increased, the sepiolite is used for the steel structure water-based acrylic acid anti-corrosion coating in the inland wharf environment, good compatibility with water-based acrylic acid emulsion is achieved, and the tensile strength and the erosion resistance of the coating can be improved.

The invention relates to the technical field of building repairing materials, and particularly discloses an anti-impact and wear-resistant repairing material and a preparation method thereof.By optimizing the content of all the components of the raw materials, the prepared repairing material has excellent anti-erosion performance and wear-resistant performance, Portland cement serves as a main cementing material, and the anti-impact and wear-resistant performance of the repairing material is improved; basic strength and cohesiveness are provided; fly ash and silicon powder synergistically enhance compactness and durability; quartz sand is used as wear-resistant aggregate, so that the compression resistance and the wear resistance are improved; the toughness and the impact resistance are enhanced by the composite modified carbon fibers; the redispersible latex powder improves the flexibility and the binding power; the polycarboxylate superplasticizer optimizes the flowability and improves the compactness; and the defoaming agent reduces pore defects and ensures material uniformity. The repair material provided by the invention is suitable for repair engineering needing to bear mechanical shock or wear environment, and has good construction performance.

This invention provides an indoor testing device and method for the surface impermeability and erosion resistance of ecological slope protection. It includes a slope simulation device with a rainfall simulation device mounted above it. The slope simulation device comprises an inclined soil-rock bearing device and a slope soil-rock layer, on which a vegetation layer is arranged. The slope simulation device is supported by a slope adjustment device. The erosion material collection device includes a mud-water collection tank, a collection trough, and a collection container. The mud-water collection tank collects surface runoff and erosion material from the vegetation layer; the collection trough collects seepage water between the vegetation layer and the slope soil-rock layer; and the collection container collects mud-water that has infiltrated below the slope soil-rock layer. This invention considers the runoff at the interface between the substrate and the slope, comprehensively analyzes the infiltration patterns of rainfall on the slope, and provides data and basis for numerical simulation and analysis processes. It provides a more accurate quantitative evaluation of the impermeability and erosion resistance of vegetation, and is more rigorous than existing testing methods.

The utility model provides a slope protection pile foundation pit supporting structure which comprises a first step supporting structure and a second step supporting structure, the slope protection piles are arranged on deep foundation pit slope protection piles, the gradient of an upper slope of a deep foundation pit is 1: 4, and double rows of supporting piles are arranged at the deep foundation pit and are arranged in a step shape. The first step supporting structure is connected with the upper portion of the deep foundation pit through a second top beam, the bottom of the second top beam is connected with a supporting pile, and the supporting pile is connected with the second step supporting structure through a slope bottom ground beam, a row pile connecting beam and the first top beam in sequence. Concrete waist beams, anchor cables and drainage holes are arranged on the side surfaces of the support piles in the first step support structure and the second step support structure; a hanging net is arranged on the surface, connected with the supporting piles, from the top beam of the first step supporting structure to the slope bottom ground beam, a hanging net is arranged on the surface, connected with the supporting piles, from the first top beam of the second step supporting structure to the foundation pit base, and concrete is sprayed to the hanging nets. The slope protection pile foundation pit supporting structure is high in erosion resistance, and the gradient and displacement of a foundation pit can be effectively controlled.

The invention relates to the technical field of alumina functional material preparation, in particular to an alumina refractory material gradient sintering process based on critical temperature control, which comprises the following steps: mixing various additives such as alpha-Al2O3 powder, nano ZrO2, Yb2O3 and the like to prepare a suspension, and carrying out spray granulation and isostatic compaction; organic matters are removed through a low-temperature section, solid solution is promoted through a medium-temperature section, a strengthening phase reaction is initiated through a high-temperature section, and sintering is performed at different heating rates in a segmented manner; hCl gas is introduced into the high-temperature section, ultrasonic vibration is applied, CO2 is introduced during gradient cooling, and pressure is applied; and finally, through segmented nitriding treatment, a gradient structure from the surface layer to the interior is formed, and the material performance is improved. According to the process, a gradient structure is formed in the material through multi-stage temperature control, additive compounding, ultrasonic treatment and other treatments; the corrosion resistance, the thermal shock resistance and the mechanical property of the refractory material can be remarkably improved, the high-temperature industrial requirement is met, the application prospect is wide, and the benefit is high.

The invention discloses a chitin-silicon-calcium-based modified material for rammed earth wall repair and a weather resistance evaluation method thereof, and belongs to the technical field of rammed earth wall repair, the chitin-silicon-calcium-based modified material comprises metakaolin, calcium oxide, quartz and chitin; the ratio of chitin to metakaolin to calcium oxide to quartz is 1: 1: 2: 4; the method comprises the following steps: pre-treating at the earlier stage of a test, evaluating freeze-thaw cycle performance, evaluating dry-wet cycle performance, evaluating salt corrosion resistance, analyzing association between a microstructure and a strength performance, and finally, revealing a material degradation rule and mechanism by combining scanning electron microscope observation, unconfined compressive strength test and crack rate analysis. When the freezing and thawing cycle number N is less than or equal to 5, the dry and wet cycle number I is less than or equal to 9, and the salt solution concentration c is less than or equal to 0.3 mol / L, the characteristics of freezing and thawing resistance, dry and wet resistance, salt erosion resistance and the like of the modified material are obviously improved; after the modified material is added, internal pores of plain soil can be filled, unconfined compressive strength of a soil body is enhanced, and long-term durability of the soil body is improved.

This invention discloses a method for improving the wear and corrosion resistance of impact rollers, relating to the field of impact roller manufacturing technology. The method includes the following steps: S1: Milling the easily worn areas on the impact roller to form a filled area; S2: Filling the filled area with high-strength, wear-resistant martensitic stainless steel as the filler material, and performing laser cladding; S3: Processing the laser cladding position to match the profile of the impact roller; S4: Aging the processed roller at a temperature below the initial austenite transformation temperature (Ac1); S5: Grinding the surface of the aged impact roller until smooth. This invention can effectively improve the surface strength, hardness, and wear and corrosion resistance of impact rollers.

The invention provides a heat dissipation plate machining process. The heat dissipation plate machining process comprises the steps that an aluminum alloy plate is subjected to sand blasting roughening after being machined; after sand blasting, staying for 5-30 minutes in an environment with the temperature of 25-40 DEG C and the relative humidity of 60-85 Sequentially carrying out first liquid pulse treatment and second liquid pulse treatment by adopting an atomization mode at an interval of 20-120s, and controlling the liquid loading capacity to be in a film state; then carrying out medium-temperature heat treatment at 60-100 DEG C to fix an interface state; and directly carrying out zirconium-series non-phosphorus conversion film treatment on the premise of no acid pickling or alkali etching, and cleaning and inspecting the zirconium-series non-phosphorus conversion film. According to the technology, through cooperative adjustment of temperature and humidity retention and double-pulse film treatment, the state fluctuation of the sand blasting surface is reduced, and the film forming uniformity, adhesive force and corrosion resistance of a conversion film are improved.

The invention provides a high-temperature-erosion-resistant Fe-based amorphous coating welding wire and a preparation method, and belongs to the technical field of metal materials. The welding wire comprises a flux core and a welding skin. Wherein the flux core comprises 25%-28% of Cr powder, 23%-25% of Nb powder, 8%-10% of B powder, 8%-10% of Si powder, 15%-17% of Mo powder, 8%-10% of W powder and the balance Fe powder; and the welding skin is a Fe60Cr40 steel strip. According to the novel Fe-Cr-Nb-B-W-Si-Mo series amorphous alloy welding wire, by optimizing the proportion of multiple components, the coating is endowed with excellent wear resistance, high temperature corrosion resistance and erosion resistance while the high amorphous content is ensured. The welding wire can adopt a conventional electric arc surfacing process, efficient protection of the surface of the water cooling wall is achieved under the low-cost condition, and an innovative solution is provided for long-acting protection of key components of a power plant.

The application discloses a soil-rock dam reinforcing and enhancing structure for preventing over-standard overflow dam break and a construction method thereof. The structure comprises a soil-rock dam filling body, a vertical anti-seepage core wall arranged in the soil-rock dam filling body, and a composite high-strength fiber three-dimensional membrane arranged on the surface of the dam slope after regulation. The membrane body is unfolded along the slope surface and is reinforced by a pressing plate type fixing anchor bolt and a fiber membrane three-dimensional rivet. The row-to-row spacing of the fixing anchor bolt is 20-50 cm, so that the composite membrane is tightly attached to the dam body. The rigid structure and the flexible protection material are organically combined, the dam body's erosion resistance and durability are significantly improved while the flood discharge capacity is ensured, the construction method is simple, the cost is low, and the method is suitable for flood control reinforcement and safe operation of various soil-rock dams.

The invention discloses an anti-corrosion method for a low-pressure steel pipe pole in a coastal area, which comprises the following steps: arranging a spiral grain pavement on the outer wall of the steel pipe pole, and sequentially arranging an outer anti-corrosion layer I, an outer anti-corrosion layer II and an outer anti-corrosion layer III from inside to outside after a micron-sized honeycomb porous structure is formed on the spiral grain pavement; the inner wall of the steel pipe pole is provided with a net-shaped grain surface, and after a micron-sized honeycomb porous structure is formed on the net-shaped grain surface, an inner anti-corrosion layer I, an inner anti-corrosion layer II and an inner anti-corrosion layer III are sequentially arranged from inside to outside; wherein flow guide grooves are formed in the spiral grain surface and the net-shaped grain surface and are used for discharging penetrating fluid; according to the anti-corrosion method provided by the invention, the anti-corrosion performance is synergistically enhanced through multiple mechanisms, and the overall corrosion resistance is remarkably improved by combining the design of the composite coating with layered inner and outer walls with multiple mechanisms such as chemical passivation, sacrificial anodes and physical shielding.

The invention discloses a copper smelting anode furnace burner block and a manufacturing method thereof, and belongs to the technical field of metallurgical kiln refractory materials. The copper smelting anode furnace burner block is prepared from the following raw materials in percentage by mass: 85 to 89 percent of Al2O3, 6 to 10 percent of ZrO2, 4 to 5 percent of Cr2O3 and 0.5 to 1 percent of SiO2. Compared with a common shaped refractory brick serving as the anode furnace burner brick, the novel castable is adopted for pouring the burner brick, integral forming is achieved, the burner brick has high physical and chemical properties and high compression resistance and shock resistance, corrosion resistance and erosion resistance are achieved, the service life is greatly prolonged, the repairing frequency of the burner brick is reduced, and the service life of the anode furnace is prolonged. And the use cost is reduced by more than 50%.

The method comprises the following steps that S1, dry materials and a binding agent are provided, and the dry materials comprise 19 wt%-24 wt% of intaglio corundum with the particle size being 3-5 mm, 22 wt%-35 wt% of intaglio corundum with the particle size being 1-3 mm, 12 wt%-19 wt% of white corundum with the particle size being 0-1 mm, 18 wt%-24 wt% of white corundum fine powder with the particle size being smaller than 200 meshes and 2 wt%-4 wt% of composite metal powder; s2, the dry material and a binding agent are mixed and ground, and a mixed and ground material is obtained; and S3, molding and drying the mixed and ground material to obtain the fire-resistant heat-insulating brick. The refractory brick produced by adopting the inked corundum and the white corundum as main raw materials, adding the composite metal powder and adding the additional binding agent has the advantages of high strength, good thermal shock resistance, good permeability resistance, good erosion resistance and long service life, and can be widely applied to rotary kilns, cement kilns and other parts.

This invention relates to a composite bellows compensator inner wall protection structure, the bellows compensator itself, and its design method. The inner wall protection structure is a composite layer structure, including an anti-erosion functional layer, a transition fixing layer, and a bellows substrate. The anti-erosion functional layer includes an outer ceramic plate and an inner ceramic plate. The transition fixing layer includes an outer ring plate and an inner ring plate, which are spaced radially and staggered axially, forming a non-rigid connection structure. The inner walls of the outer and inner ring plates are respectively provided with the outer and inner ceramic plates. The bellows substrate is made of thin metal sheet and has a corrugated structure, used to realize the displacement compensation function of the bellows compensator. One end of the outer ring plate is fixedly connected to the inner wall of the bellows substrate. This invention effectively improves the wear resistance, deformation coordination, and overall operational reliability of the bellows compensator under complex working conditions by constructing a composite protection system on the inner wall of the bellows that combines high erosion resistance and good deformation adaptability.

This invention belongs to the field of metallic materials technology, and relates to a laser-based anti-corrosion and wear-resistant material and repair process for repairing impact turbines. The material comprises the following components by mass percentage: Cr: 10-20%; Co: 10-20%; Nd: 1.5-2.5%; Ni: 3-8%; C: 0.01-0.2%; Nb: 0.1-1%; W: 1-5%; V: 0.1-1%; Mo: 0.8-1.2%; Mn: ≤3%; Ti: 0.01-0.1%; N: 0.10-0.5%; Si: 0.1-0.2%; P: 0.01-0.05%; Fe: balance. The repair method of this invention shortens the labor time required for programming irregularly shaped sections, simplifies the complex programming process, and greatly improves production efficiency. After laser repair, the turbine was tested by flaw detection, hardness testing and actual operation testing, all of which proved that the material’s erosion resistance and corrosion resistance met the requirements for normal use. No cracks, cavitation, wear or missing material appeared again in the repaired area.

The present application relates to the technical field of complex shape remanufacturing, in particular to a complex shape remanufacturing method and material for a desulfurization circulating pump impeller, the complex shape remanufacturing method comprising constructing a multi-modal damage intelligent mapping; synchronously preparing plasma activation and micro-texture; performing energy field coupling cladding repair; performing stress field balance shot peening strengthening; implementing gradient coating self-propagating synthesis; performing thermal-mechanical coupling precision shaping; performing micro-gap pressure infiltration sealing; and performing multi-physical field service simulation verification. The present application can significantly prolong the service cycle of key components, comprehensively enhance the comprehensive performance of anti-cavitation and erosion resistance, establish a digital twin closed loop of damage diagnosis, repair optimization and life prediction, and simultaneously realize life cycle cost control and resource saving. Not only can the present application repair failed components, but also can it rebuild a sustainable operation system.

The application provides a coal quality improving and caking enhancing dust inhibitor and a preparation method thereof. Through synergistic effect of components, the coal quality improving and caking enhancing dust inhibitor can not only form a tough solidified film on the surface of coal, effectively inhibit dust flying and reduce coal loss, but also improve apparent calorific value of coal and improve coal quality through catalytic oxidation and pore filling mechanism. A composite wetting system can significantly reduce surface tension of a solution, and enhance the penetration and wrapping capacity of coal dust. A bonding system can form a solidified film with a three-dimensional network structure, and provide excellent wind erosion resistance and mechanical strength. Meanwhile, the quality improving and caking enhancing system can form a dense oxidation layer by catalyzing oxidation of light components on the surface of coal, and adsorb moisture, thereby reducing volatile loss and improving the calorific value of coal. In addition, the use of auxiliary components ensures the stability and environmental friendliness of the product under different environmental conditions. The preparation method is reasonable in process design, the product is stable in performance, and is suitable for industrial production.

The invention discloses a novel nano-coating cast steel brick and a preparation method thereof. The cast steel brick comprises a cylindrical refractory matrix, a double-layer nano coating and a modified metal reinforcing belt, wherein the double-layer nano coating comprises a nano aluminum oxide bottom layer and a functional layer containing a sol-gel pre-coated graphene-ceramic composite material. According to the preparation method, pulse vibration forming, a sol-gel pre-coating technology and a carbon thermal reduction protective atmosphere sintering technology are adopted, the graphene-ceramic composite material has an Al2O3-BN double-layer ceramic coating layer protection structure, and the structural stability of graphene at the high temperature is ensured. The technical problems of low refractoriness, poor corrosion resistance and short service life of a traditional cast steel brick are solved, the refractoriness is improved by about 6%, the corrosion resistance is improved by 78%, the thermal shock stability is improved by about 79%, the single use performance is improved by 250%, and the cast steel brick is suitable for molten steel flow control in a continuous steel casting process.

The invention relates to the technical field of roadbed slope protection, discloses a roadbed slope protection composition based on solid waste-geopolymer and a construction method of the roadbed slope protection composition, and aims to solve the problems of high carbon emission, low solid waste utilization rate, strong ecological destructiveness and weak disaster resistance of a traditional roadbed slope protection material. According to the invention, fly ash, desulfurized gypsum, mineral powder and pretreated red mud are taken as core raw materials, and are matched with a geopolymer activator and a heavy metal stabilizer to form a cement-free flow state system with a high solid waste mixing ratio; during construction, a casing pipe is not needed, through the drilling-layered pouring technology, the solidification body is naturally attached to soil through the fluidity, a multi-deformation solidification structure without rigid cutting is formed, the anti-scouring and anti-collapse capacity of a roadbed slope can be enhanced through the structure, damage of natural disasters such as flood to a roadbed can be effectively resisted, and the construction period is shortened. Meanwhile, the ecological compatibility of the mechanical property and the plant root system penetration rate is considered.

The utility model discloses an anti-erosion magnetic drive pump with efficient isolation, which belongs to the technical field of magnetic drive pumps and comprises a pump body, an isolation sleeve and a stepped sealing ring. Flange plates are arranged at the two ends of the isolation sleeve, the isolation sleeve is connected with the pump body through the flange plates, the isolation sleeve comprises an inner sleeve and an outer sleeve, the inner sleeve is arranged in the outer sleeve and fixedly connected through bolts, the inner sleeve is made of corrosion-resistant materials, the outer sleeve is made of compression-resistant materials, an annular groove is formed in the inner wall of the inner sleeve, and an eddy current restraining piece is embedded in the groove. The stepped sealing ring is arranged at the connecting end of the isolation sleeve and the pump body and sequentially comprises a first-stage ring, a second-stage ring and a third-stage ring from inside to outside, and stepped fall is formed among the rings. According to the magnetic drive pump, pressure resistance and corrosion resistance are both considered, the service life is prolonged, energy loss is reduced, the comprehensive efficiency of the magnetic drive pump is improved, the inner sleeve or the outer sleeve in the isolation sleeve can be rapidly replaced, the maintenance time is shortened, the step sealing ring is adopted, the leakage risk is remarkably reduced, and the maintenance cost is low.

The utility model discloses an ecological vegetation restoration device for river and lake bank slopes, and relates to the technical field of ecological restoration. A plurality of grooves are formed in the ring walls of a plurality of positioning rings at equal angles; two ends of a plurality of connecting network cables are respectively arranged in the grooves by using connecting assemblies; a plurality of positioning nails are movably inserted into the positioning ring respectively, the positioning nails are matched with and abut against the inner wall of the positioning ring, and open grooves are formed in the top ends of the positioning nails; one end of each of a plurality of rotating pressing rods is screwed in the corresponding open groove through threads, and the other end of each rotating pressing rod is screwed with a fixing ring through a bearing; the plurality of turfs are respectively arranged on the bank slope, and the connecting net lines are positioned behind the turfs; a plurality of fixed insertion rods are fixedly arranged on the ring wall of the fixed ring at equal angles, and the fixed insertion rods are movably inserted into the turf; by means of the net structure formed by the positioning rings and the connecting net lines and the fixing effect of the positioning nails, the turf can be conveniently fixed to the bank slope, the anti-scouring capacity of the bank slope is improved, and ecological restoration of the bank slope is facilitated.

The tuyere medium sleeve with the protection enhancing function comprises a cylindrical body, and the front end and the rear end of the body are used for being connected with a small tuyere sleeve and a large tuyere sleeve correspondingly to form a hollow sleeve body used for clamping an air supply channel; a cooling cavity is formed in the body wall of the body, and a side grouting opening penetrating through the body wall is formed in the thickness direction of the body wall. A grouting channel penetrating from the rear end to the front end is formed in the length direction of the body wall, a grouting outlet is formed towards the surface of the outer wall of the tuyere small sleeve, and the grouting channel can be repeatedly drilled and dredged so that slurry can flow through the grouting channel many times and can be repeatedly used. According to the tuyere medium sleeve, the grouting channel from the rear end to the front end is designed, so that the grouting material can form a protection layer on the outer wall of the tuyere small sleeve, the protection effect of the tuyere small sleeve is enhanced, and the wear resistance and erosion resistance are improved. The grouting channel can be dredged by drilling, multiple grouting operations are allowed, the maintainability of the structure is improved, and the service life is prolonged.

The invention belongs to the field of gravel curtain layer reconstruction, and provides a gravel curtain layer reconstruction method which comprises the steps of stripping, screening, storage, improvement, reconstruction, watering and maintenance, and further provides a soil-stone separation device used in the gravel curtain layer reconstruction method, the soil-stone separation device comprises a separation tank, the top of the separation tank is open, a gravel flow guide bin covers the separation tank, and a sieve plate is rotationally arranged in the separation tank; the sieve plate is arranged in the separation tank and vibrates during rotation, the interior of the separation pipe is divided into a screening bin and a soil receiving bin in an up-down corresponding mode through the sieve plate, and the sieve plate can move upwards through a jacking mechanism so that the sieve plate can be moved out of the separation tank and separated objects can be thrown out all around through centrifugal force. The damaged gravel curtain layer is reconstructed, a crust layer is formed below the gravel layer, the wind erosion resistance can be greatly enhanced, it is guaranteed that strong wind erosion can be effectively resisted for a long time, and meanwhile gravel and original gravel curtain layer soil can be rapidly separated and stacked in a high-quality mode in the gravel curtain layer reconstruction period.