121 results about "Water erosion" patented technology

The invention discloses a laser additive repairing method for 17-4PH steam turbine blades, and relates to a laser repairing method for steam turbine blades. The method aims at solving the technical problem that in existing laser additive 17-4PH turbine blade repairing, the difference between the thermal expansion coefficient of Co-based corrosion-resistant alloy and the thermal expansion coefficient of 17-4PH alloy is large, and consequently the interface performance is reduced after repairing is conducted. According to the laser additive repairing method for the 17-4PH steam turbine blade, due to the fact that 17-4PH is poor in water erosion resistance, Co-based alloy powder is used for preparing a water erosion resistance structure, on the basis, in consideration of the problem that the performance difference of the Co-based alloy powder and the 17-4PH material is large, a powder component gradient transition mode is adopted, and the water erosion resistance of the 17-4PH steam turbine blade is greatly improved. The problem of low interfacial strength during direct transition is solved, the binding capacity of the Co-based water erosion resistant layer and the 17-4PH matrix is improved, and finally the service time of the 17-4PH blade is prolonged.

The present disclosure relates to the field of slope soil protection, and particularly relates to a modified soil ecological base material for ecological slope protection, a preparation method and application thereof; the modified soil ecological base material is used in high-cold high-humidity high-altitude areas; the modified soil ecological base material comprises the following: an anti-skid anti-ultraviolet freeze-thaw resistant layer; and a soil adaptive layer; wherein the anti-skid anti-ultraviolet freeze-thaw resistant layer comprises modified plant fibers and an anti-ultraviolet freeze-thaw resistant composite material; the soil adaptive layer comprises a water-absorbing composite material. The present disclosure prepares a modified soil ecological base material which has good freeze-thaw stability, excellent water erosion resistance and water retention performance, is eco-friendly and degradable, and is used for ecological slope protection in high-cold high-humidity high-altitude areas.

The invention discloses a turbine blade water erosion defect monitoring and identification method, and relates to the technical field of turbine state monitoring and fault diagnosis. The method comprises a state sensing module, a feature processing module, an intelligent identification module and an early warning correction module. The state sensing module collects macroscopic feature data such as vibration signals and operation parameters; the feature processing module performs multi-dimensional extraction on the data and constructs a fusion feature vector; the intelligent identification module outputs a water erosion defect level through a dual-mode autonomous learning model; and the early warning correction module executes graded early warning and performs closed-loop correction on the model based on an actual result. Early recognition of water erosion defects is achieved, new and old units are adapted, and monitoring reliability and economical efficiency are improved.

The invention provides a method for preventing and controlling nitrogen and phosphorus loss of sandy and dry cultivated land based on EICP root reinforcement and relates to the field of soil ecological protection and agricultural pollution prevention and control. According to the method, a three-dimensional prevention and control system is formed from the two dimensions of surface layer film covering protection and deep root system soil fixation through the synergistic effect of EICP film covering and local plant root system three-dimensional reinforcement, wind erosion and water erosion are effectively resisted, the soil nitrogen and phosphorus loss rate of the large-gradient sandy and dry cultivated land is remarkably reduced, and meanwhile the soil desertification process is slowed down; the EICP film covering layer has good water permeability and moisture retention, nitrogen and phosphorus loss can be prevented, rainfall infiltration and soil moisture conservation can be guaranteed, and the germination rate and the growth speed of crops are increased; according to the method, local crop root system reinforcement is selected, the original planting structure is not disturbed, the economic benefit of cultivated land yield per mu is guaranteed, a harmless means of combining microorganisms, geotechnical engineering and agricultural planting is adopted, external pollution sources are not introduced, original basic characteristics of soil are not damaged, and the requirement for ecological protection of the Yellow River basin is met.

The application discloses an experimental device and method for water erosion of multi-flow-channel blades of last two stages of a steam turbine under different loads, and the experimental device comprises a steam generator, a ball valve a, a pressure reducing valve, a vortex flowmeter, a nozzle, a penultimate stage static blade, a penultimate stage dynamic blade, a last stage static blade, a last stage dynamic blade, a cylinder, a fixed shaft, an exhaust port, a vacuum valve, a gas suction pump, a high-speed camera, a computer, an air compressor, a particle generator and a ball valve b. The method can be used for exploring water erosion damage of last two stages of blades of a thermal power steam turbine under different working conditions, different pressures in the cylinder are changed through the gas suction pump and computer end control, pressure values in the last two stages under different working conditions are achieved, the nozzle is arranged along the height of the blade, the flow state of steam in the blade passage of the last two stages can be better simulated, the last two stages of blades are fixed on corresponding discs respectively, the mutual influence between the blades is considered, and the flow state of steam in the last two stages of the low-pressure cylinder of the steam turbine can be truly reflected.

This invention discloses a laser thermal spraying gun, belonging to the field of laser additive manufacturing technology. It includes a connecting base, an air knife assembly, an inner nozzle, an outer nozzle, a cooling jacket cover, and a cooling jacket tube. The outer nozzle includes a powder feeding body and a Laval tube. The Laval tube has diffusion holes inside. The Laval nozzle accelerates the airflow through a tapered-expanding structure, forming a high-speed, high-temperature jet environment. This ensures the powder is fully preheated and uniformly dispersed before reaching the substrate. Combining the Laval tube with laser spraying combines the advantages of laser cladding and thermal spraying technologies. The accelerated effect of the Laval airflow, under high temperature and high pressure, allows the powder to fully contact the laser heat source over a sufficiently long flight distance through the Laval nozzle. This enables the powder to form a metallurgical bond with the substrate in a molten state, achieving a bonding strength 2-3 times that of traditional thermal spraying. This method is suitable for confined spaces used in the protection and repair of turbine blades from water erosion.

The invention provides a protective farming method suitable for black soil in a wind and water erosion staggered area and application of the protective farming method, and relates to the technical field of agricultural soil improvement. The method comprises the following steps that before crops are planted, black soil in the wind and water erosion interlaced area is subjected to deep scarification, the ground surface is completely covered with straw, and the use amount of the straw is 100% of the straw biomass of previous crops. Through optimal combination of an integrated cultivation mode and straw coverage, a soil physical structure, organic carbon components and microbial activity are comprehensively regulated and controlled, a soil quality evaluation system containing physical, chemical and microbial indexes is constructed, and synchronous improvement of black soil quality and corn yield in a wind and water erosion staggered region is realized; and a technical support is provided for protection and sustainable agriculture of black soil in the wind and water erosion interlaced area.

The utility model relates to the technical field of mobile phone camera modules, and discloses a waterproof mobile phone camera module, which comprises a fixed outer frame, a waterproof shell is fixedly connected in the fixed outer frame, a camera module is fixedly connected in the waterproof shell, a sealing assembly is arranged in the waterproof shell, and the camera module is fixedly connected in the waterproof shell. The sealing assembly comprises a rubber sealing ring, the rubber sealing ring is fixedly connected to the interior of the waterproof shell, a secondary sealing ring is fixedly connected to the interior of the waterproof shell, and an infrared optical filter is fixedly connected to the interior of the waterproof shell. According to the utility model, through the combined action of the rubber sealing ring and the secondary sealing ring in the waterproof housing, dual-sealing protection is formed, moisture and dust are prevented from permeating through gaps, and the polyurethane hydrophobic coating further enhances the waterproof performance and ensures that water drops roll on the surface and are not detained on the surface of the module, so that the service life of the module is prolonged. The camera module can work normally in a wet or severe environment, and faults caused by water erosion are avoided.

The application discloses a kind of slot wall collapse simulation device, including box, water inlet hole plate, water outlet hole plate, cover plate, air connection water inlet pipe, displacement sensor;Multiple pore water pressure sensors;Cover plate is installed above first area, and is used to close the top of first area;Air connection water inlet pipe is communicated with first area inside;Multiple pore water pressure sensors are placed in the inside of soil sample in second area;Displacement sensor is installed in simulation tank.The device can simulate the migration of water flow in soil sample under different groundwater depths by pressurization, and then cause the process of soil sample collapse;It can test the stability of soil layer conditions in construction area under the action of groundwater, quantitatively evaluate the porosity and water erosion resistance of soil sample;At the same time, it can also approximately infer the depth of possible hole wall collapse, for engineering construction reference, to judge whether soil sample reinforcement is needed and propose appropriate soil sample reinforcement method, reduce the impact of hole wall collapse on project progress.

The invention relates to a side slope alkali-reducing ecological substrate layer and a preparation method thereof. The substrate layer comprises planting soil, a hydraulic inorganic cementing agent, an alkali-reducing composition, a bionic feather structure formed by spraying and adhering carbon fibers and soybean protein fibers, and an additive; the bionic feather structure contains hydrophilic colloidal particles and a halophilic and alkaliphilic biological agent. A slowly-released acidic group is introduced into the alkali-reducing composition, so that alkalinity is continuously neutralized, and the problem that plants are difficult to grow due to the fact that the pH value of soil is maintained to be 11-14 is solved. Moreover, the bionic feather structures dispersed in the matrix form tiny pores, a large amount of air is stored in the tiny pores, a barrier for effectively preventing convection of cold and hot air is formed, and the temperature stability of the matrix layer is improved; the hydrophilic colloidal particles in the matrix can keep the fluffy and breathable properties of the matrix and avoid water loss and vegetation root system damage caused by dry cracks on the surface of a base layer, so that rooting and survival of plants can be restored, and wind erosion resistance and water erosion resistance are also facilitated.

The utility model relates to the technical field of prevention frames, in particular to a water and soil loss prevention frame which comprises a first protection frame, a second protection frame arranged on the side face of the first protection frame, a fixing base fixedly connected to the side face of the first protection frame, a hinge plate fixedly connected to the side face of the second protection frame and hinged to the fixing base. A first partition plate is fixedly connected into the first protection frame, a second partition plate is fixedly connected into the second protection frame, a plurality of installation spaces are formed among the first partition plate, the first protection frame, the second partition plate and the second protection frame, and a first protection net and a second protection net are fixedly connected into the installation spaces respectively. Through cooperative use of the first protection frame, the first protection net and the second protection net, the prevention and treatment frame can be flexibly folded and unfolded according to different terrains and gradients, and the first protection frame and the second protection frame are allowed to rotate relatively within a certain range through cooperative connection of the hinge plate and the fixing base. Therefore, different gradients can be adapted.

The application discloses a kind of compositions for road surface water treatment, including multiple hollow spheres with 4-10cm inner diameter and 1-3mm wall thickness, 10-15 parts of void filling material, 5-10 parts of water-absorbing material, 6-10 parts of initiator, 10-20 parts of heat storage material, 15-20 parts of thermal insulation material, several columnar packaging tubes with 0.5-2cm diameter, 1-2mm wall thickness and 3-5cm length, and appropriate amount of adhesive;The multiple hollow spheres with 4-10cm inner diameter and 1-3mm wall thickness are made of 100 parts of porous carrier material;The several columnar packaging tubes with 0.5-2cm diameter, 1-2mm wall thickness and 3-5cm length are made of 5-10 parts of packaging material;The composition can quickly absorb and fix the accumulated water in the road, realize the persistent evaporation of absorbed water, reduce the entry of road surface water into the road surface structure, and effectively avoid the road diseases caused by water erosion of the road surface structure;The application also discloses a method for making the composition for road surface water treatment.

A silane-modified epoxy resin-based underwater remediation material comprises: silane-modified epoxy resin, PEG-PAA graft copolymer, mussel biomimetic adhesive, hydrophobic nano-kaolin, hyperbranched polyester, carbon nanotube / montmorillonite hybrid material, temperature-controlled microcapsule material, cashew phenol-modified amine curing agent, nano-calcium carbonate whiskers, calcium alginate / PAM dual-network material, cellulose nanofibers, organic bismuth catalyst, and heavy calcium carbonate; this application also includes its preparation and application methods. The silane-modified epoxy resin-based underwater remediation material of this invention can form a strong and reliable bond in an underwater environment, exhibits a high thixotropic index, a low chloride ion diffusion coefficient, and strong resistance to water erosion, meeting the requirements for underwater use and construction; it also meets environmental protection requirements, reducing harm to the environment and construction personnel, and achieving green and environmentally friendly construction.

The invention relates to the technical field of environmental remediation materials, in particular to a hydrogel-based curing agent as well as a preparation method and application thereof. The hydrogel-based curing agent provided by the invention can repair engineering construction repair scenes prone to water and soil loss for a long time at a time, and is short in repair period, low in cost and good in repair effect. Specifically, the invention discloses a bio-based ionic cross-linked hydrogel curing agent, sodium alginate and chitosan are taken as base materials, the structural stability is enhanced through double-particle-size nano bentonite, and a water erosion resistant curing shell layer can be quickly formed by combining the fertilizer retention function of polyglutamic acid, so that long-acting repair of a red clay slope is realized, the repair period is short, the cost is low, and the curing agent has a wide application prospect. The method is suitable for water and soil loss prevention and control projects.

The present application relates to low carbon geopolymer construction material technical field, especially to a kind of underwater non-dispersive flow state solidified soil of submarine caisson foundation, belong to high-strength underwater non-dispersive flow state solidified soil, by using sulphidation steel slag powder as main cementitious material, add mineral powder and fly ash, and add sulphoaluminate cement clinker and water glass as activator, use submarine silt and sea sand as granular material, and configure special additive, can use seawater to mix, obtain the underwater non-dispersive flow state solidified soil with good cohesiveness, underwater non-dispersive, good fluidity, higher mechanical property, can effectively prevent water erosion.

The invention belongs to the technical field of nuclear power, and particularly relates to an adjustable turbine blade optical detection device. The device provided by the invention is compact and light in design, can be firmly mounted on the surface of the blade, has a flexible contact surface, and effectively prevents the blade from being damaged. The device supports telescopic adjustment and multi-angle rotation, adapts to different blade widths and space limitations, is matched with a high-resolution optical probe, realizes accurate shooting and video recording of water erosion morphology in a state of not opening a cylinder, and greatly improves the flexibility and precision of on-site detection.

The invention relates to the field of bath cabinets, in particular to a bath cabinet for high-humidity sterilization. The invention provides a bath cabinet for high-humidity sterilization, which comprises a bath cabinet main body, a storage compartment is internally provided with cavities which are symmetrical up and down, each cavity is internally provided with a drawer, the bottom of a table top is fixedly connected with telescopic parts which are symmetrically distributed, a U-shaped wiping frame is fixedly connected between telescopic parts of each telescopic part, and the inner side of each U-shaped wiping frame is fixedly connected with a plurality of wiping blocks. Water drops attached to the outer side of the drawer on the surface of the cabinet body are quickly wiped through the wiping block, the influence of the humid environment on the cabinet body is effectively reduced, the problems of wood expansion, metal corrosion and the like are avoided, and the service life is remarkably prolonged; meanwhile, the motor, the screw rod and the sliding frame are used for controlling the shielding film to be unfolded and rolled in a linkage mode, automatic shielding is achieved in the high-humidity environment, and the cabinet body is protected against water spraying and erosion; the bath cabinet is convenient to operate, comprehensive in function and particularly suitable for special scenes such as bathhouses, and durability and applicability of the bath cabinet are greatly improved.

The utility model relates to the technical field of drainage, in particular to a drainage system for a fan platform and a road slope of a mountain wind power plant. The road is connected with a fan platform, an excavation side slope is arranged on the side, close to a mountain, of the road, the excavation side slope is sequentially provided with a plurality of side slope structures from top to bottom in the slope direction of the excavation side slope, and the drainage system comprises a first water retaining ridge arranged on the side, away from the mountain, of the road and arranged in the extending direction of the road; the first drainage ditch is arranged on the side, close to the excavation slope, of the road and used for collecting and conveying water on the excavation slope and the road; the first intercepting ditch is arranged at a riding track between two adjacent side slope structures and is used for collecting water on the side slope structures above the first intercepting ditch; and the drainage pipeline is used for conveying water in the first intercepting ditch to the first drainage ditch. The problems of large-area scouring and water erosion of water flow to the slope surface and the road surface can be effectively solved, the stability of the slope and the roadbed is effectively improved, and a guarantee is provided for long-term stable operation of a mountain wind power plant.

The invention discloses a low-pressure cylinder zero-output flexible transformation steam turbine cooling system and method, and relates to the technical field of steam turbines, the system comprises a main steam circulation unit, a heat supply and cooling unit and a spray cooling unit; accurate control over the exhaust steam temperature under the zero-output working condition of the low-pressure cylinder is achieved, meanwhile, potential safety hazards caused by water erosion, thermal shock and the blast effect are effectively avoided, and the safety and economical efficiency of a unit are remarkably improved. And the flow control module and the temperature control module can dynamically adjust the temperature and flow of spraying water according to the exhaust steam temperature, it is ensured that the temperature difference is within the reasonable range of 30-80 DEG C, and thermal shock or water erosion of the blades is avoided. In addition, the last-stage blade is subjected to wear-resistant and water-erosion-resistant spraying treatment, and the second last-stage blade and the partition plate are removed, so that the blast loss and the water erosion risk are reduced. The atomization effect of spray water is optimized, no blind area exists in coverage, the cooling efficiency is further improved, and reliable technical support is provided for flexible transformation of a thermal power generating unit.

This invention relates to the field of soil conditioning or soil stabilizing materials, and discloses a hydrolyzed polysaccharide-biofilm soil protectant for initial soil conditioning and its application method. It utilizes a large amount of pectin-based hydrolyzed polysaccharides produced during the degradation of waste fruits and vegetables by microorganisms, including acid-producing bacteria, to rapidly aggregate soil particles, resisting wind and water erosion while allowing fungal hyphae to attach. Organic acids, as a byproduct, enhance mineral weathering and release nutrients from the minerals. Plant stem powder mixed into the soil along with waste fruits and vegetables is decomposed by fungi, and combined with nutrients released from the minerals and nitrogen-fixing bacteria regulating the carbon-nitrogen ratio, it maintains the growth of biofilm-producing bacteria, phosphorus- and potassium-solubilizing bacteria, etc., producing a biofilm to continue maintaining soil particle aggregation and releasing nutrients to maintain fertility, thereby supporting vegetation growth and maintaining organic matter supply and circulation. The combination of these factors achieves the improvement of initial soil conditioning without consuming large amounts of chemical agents and fertilizers.

The application provides a coating material and a laser cladding process for steam turbine blade water erosion resistance, and the mass percentage of each component of the coating material is as follows: C: 0.65-0.80wt%, Cr: 3.00-6.50wt%, Mn: 0.22-0.55wt%, Nb: 0.30-0.80wt%, Mo: 4.00-8.50wt%, Si: 0.1-0.3wt%, W: 5.00-8.00wt%, V: 1.50-2.50wt%, Al: 0.40-0.60wt%, and the balance is Fe and a small amount of impurity elements. The laser power density in the cladding process is 100-150W / mm 2 , argon is used to protect the molten pool, the powder feeding amount is 40-60r / min, and the multi-pass lap rate is 30-50%. The coating material provided by the application has the characteristics of high toughness, not easy to produce pores and excellent water erosion resistance. The cladding layer prepared from the coating material has high water erosion resistance and good comprehensive mechanical properties.

The present application belongs to the technical field of steam turbine, and discloses a simulation experiment device using additional liquid film anti-water-erosion technology. The experiment device is provided with a liquid film supply pipe, a rotating shaft, a rotating disc and blades uniformly arranged on the circumference of the rotating disc. The liquid film supply pipe is used for supplying liquid and is connected with a transport channel arranged on the rotating disc. The transport channel is connected with a blade liquid supply channel in the blade. A protruding step is arranged at the bottom of the windward surface of the blade. A drainage groove is arranged at the junction of the step and the windward surface of the blade. The drainage groove is used for changing the direction of the liquid ejected from the blade liquid supply channel, so that the direction of the liquid ejected changes from perpendicular to the windward surface of the blade to parallel to the windward surface of the blade. When the rotating shaft rotates, the liquid ejected from the drainage groove forms a liquid film on the surface of the blade under the action of centrifugal force. The present application can simulate the buffering effect of the additional liquid film on the surface of the blade on water erosion, and contributes to the research on liquid film anti-water-erosion.

This invention relates to a method for evaluating the degree of water erosion development in rock masses based on core logging. Based on detailed logging of collected core samples, and considering the integrity of the core samples after alteration, a qualitative grading method is used to evaluate the degree of core development. The evaluation results are digitized and software is used to create contour maps of the water erosion degree in the rock mass. This visually displays the degree of water erosion development and interrelationships among multiple boreholes within the same geological space, and predicts the location and extent of potential water erosion development areas in the rock mass. This method uses the degree of alteration development caused by groundwater erosion of the core sample as a relevant indicator of water hazard formation. It simulates and predicts potential alteration areas in the rock mass, identifies potential alteration areas as key targets for mine water hazard prevention and control, and formulates effective remediation measures to minimize the harm of potential groundwater in alteration zones to later mining operations.

The invention relates to the technical field of soil fertility improvement and soil erosion prevention and control, in particular to a method for reducing the erodibility of soil in a wind erosion and water erosion staggered region. The method comprises the following steps: one year before sowing, thoroughly decomposed cow dung and sheep manure are uniformly applied to the earth surface for deep ploughing, and the depth is 15-25 cm; inorganic fertilizer is used as base fertilizer to be applied to the land together with the seeds during sowing; different amounts of urea are applied for topdressing in the jointing stage. The organic fertilizer (cattle and sheep manure) and the inorganic fertilizer are reasonably combined and applied, so that soil erodibility indexes (such as aggregate stability, organic matter content, cohesive force, compactness and the like) are remarkably adjusted, a comprehensive index for evaluating the soil erodibility is also constructed, key factors influencing the soil erodibility are analyzed, and the soil erodibility evaluation method has the advantages that the soil erodibility evaluation accuracy is improved. The method is suitable for the black soil area along the foot of the great khingan with staggered wind and water erosion.

The invention relates to the technical field of power distribution cabinet supports, and discloses a self-adaptive supporting mechanism of a power distribution cabinet and the power distribution cabinet, the self-adaptive supporting mechanism comprises guide rails, the guide rails are fixedly mounted on two side walls of the power distribution cabinet, supporting legs are slidably arranged on the guide rails, and supports are rotatably mounted on sliding plates of the supporting legs; a rotation control assembly sliding plate and a self-locking assembly sliding plate are arranged on the support; when the self-adaptive supporting mechanism of the power distribution cabinet is used, the power distribution cabinet can be lifted and supported by the supporting legs, so that the bottom of the power distribution cabinet is far away from the ground, water vapor and accumulated water erosion on the ground are effectively isolated, and when the power distribution cabinet is lifted to the mounting height, the support automatically rotates to a horizontal state and supports the power distribution cabinet; the overall height of the power distribution cabinet is small during transportation, the height of the power distribution cabinet is large during working, the collision risk and the space occupation requirement in the transportation process are reduced, and therefore the power distribution cabinet has the self-adaptive capacity of height adjustment in the transportation and use process.

The present application relates to the technical field of steam turbine, and especially relates to a steam turbine low-pressure cylinder blade water erosion prevention system, which comprises a controller, an ultrasonic sensor for monitoring the liquid drop particle size and concentration of the low-pressure cylinder exhaust side, a temperature detector for monitoring the low-pressure cylinder exhaust temperature, a first nozzle group and a second nozzle group each having a plurality of nozzles arranged on the low-pressure cylinder exhaust side, and a first water injection pipeline and a second water injection pipeline respectively for conveying water to the first nozzle group and the second nozzle group, the number of nozzles of the second nozzle group is more than that of the first nozzle group, the first water injection pipeline and the second water injection pipeline are respectively provided with a first adjusting valve and a second adjusting valve, and the ultrasonic sensor, the temperature detector, the first adjusting valve and the second adjusting valve are all connected with the controller. The present application also relates to a steam turbine low-pressure cylinder blade water erosion prevention method using the system, which mainly comprises the following steps: controlling and adjusting the opening degree of the first adjusting valve and / or the second adjusting valve according to the liquid drop particle size and concentration by the controller, and controlling the water injection amount. The blade water erosion can be eliminated without processing the blade.

The utility model provides an anti-seepage and anti-sprinkling beam transverse water drain pipe for a bridge. In order to solve the problem that drainage of an existing horizontal drainage pipe is prone to deviating and eroding a bridge structure, horizontal distribution of a water outlet of a bridge floor drainage pipe is changed into connection of a vertical section and an inclined section through a bent section, and therefore the drainage direction is vertically deviated from the inner side of a bridge and inclines downwards. The discharged water is prevented from deviating to erode web plates and bottom plates of the upper structure under the action of wind power, the maintenance cost of the upper structure caused by water erosion is reduced, the structural durability is improved, the bridge floor water is prevented from being discharged out of the road land use range, the problem that the transverse water drainage pipe of the bridge drains water to flush the ground is solved, and the social benefit is improved.

The application discloses a kind of experimental device and method of low-pressure last two stages blade water erosion of thermal power steam turbine under deep peak regulation condition, the experimental device includes steam generator, ball valve a, pressure reducing valve, vortex flowmeter, nozzle, penultimate stage static blade, penultimate stage moving blade, last stage static blade, last stage moving blade, cylinder, rolling shaft, vacuum valve, air pump, high-speed camera, computer, air compressor, particle generator, ball valve b, high-speed motor.The method can explore the water erosion damage of thermal power steam turbine last two stages blade under deep peak regulation condition, by air pump and computer end control, different pressure in cylinder can be changed, to reach the pressure value in last two stages under different conditions in the process of deep peak regulation, nozzle is set along the height of blade, the flow state of steam in last two stages blade passage can be better simulated, last two stages blade staggered arrangement can truly reflect the single channel of low-pressure cylinder last two stages blade of steam turbine.

This utility model relates to the field of disaster relief technology, and provides a foldable steel cage, which includes a bottom mesh for supporting the filling material. The bottom mesh includes multiple first support rods distributed circumferentially around the bottom mesh. It also includes load-bearing side meshes rotatably mounted on the first support rods. These load-bearing side meshes can switch between a stowed state and a load-bearing state by rotation. In the load-bearing state, the multiple load-bearing side meshes can close together to form an enclosing space to support the filling material. In the stowed state, the multiple load-bearing side meshes rotate towards the bottom mesh, saving space. This foldable steel cage is easy to transport in its folded state, and when unfolded, it forms a cage suitable for flood control applications such as dam slope reinforcement and breach sealing. It can tightly secure internal stones or sandbags, preventing water erosion and improving dam stability. This technical solution solves the problem of large size and inconvenient transportation of existing steel cages.

This invention discloses a curing agent for rapidly solidifying waste mud using modified magnesium phosphate cement and its preparation method, belonging to the field of building materials technology. This method can treat waste mud generated during civil engineering construction and tunnel engineering. The curing agent, by weight, comprises the following components: 8-12 parts magnesium phosphate cement, 6-8 parts quicklime, 6-8 parts blast furnace slag, and 4-6 parts sodium silicate. Compared with existing technologies, this invention modifies the magnesium phosphate cement, giving the solidified waste mud higher strength. This invention, through mixing and stirring with the waste mud, achieves a series of hydration reactions over solidification times of 3, 7, 14, and 28 days, forming a large amount of hydration cementitious products. This approach utilizes the low cost of industrial solid wastes like blast furnace slag and quicklime, reducing the cost of solidification treatment. Furthermore, it improves the strength and water resistance of the solidified soil from the waste mud, rapidly increasing its strength and enhancing its resistance to water erosion in a short period.