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36results about How to "Reduce water erosion" patented technology
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Method for repairing soil of cadmium polluted by solanaceae plant
InactiveCN1724184APrevent water erosionReduce water erosionContaminated soil reclamationPollution soilInflorescence
Owner:SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
Straw water storing seedling growing bowl and its production method
A seadling growing bowl is prepared from pulverized straw and / or stalk and adhesive (polyacrylamide) in weight ratio of 100:(0.2-1). Its advantages are low cost, and no pollution.
Owner:INST OF DRY LAND FARMING SHANXI ACAD OF AGRI SCI
Wide-row flat planting protective tillage planting method for maizes
InactiveCN102396333AReduce runoffReduce churnSeed and root treatmentAgriculture gas emission reductionEvaporationScarification
The invention relates to a planting method for crops, in particular to a wide-row flat planting protective tillage planting method for maizes. The planting method comprises the following seven steps of: performing land preparation, sowing, rolling after sowing, weeding by pesticides, subsoiling mechanically and performing side deep fertilizing, preventing and controlling diseases and insect pestsand harvesting mechanically. In the planting method, the conventional 60-centimeter uniform ridge planting mode is changed into a flat planting mode of 80-centimeter row pitch and 20-centimeter row spacing, and ventilating and light-transmitting space of the crops is increased; the conventional shallow intertillage and shallow fertilization mode is changed into a mechanical deep scarification anddeep topdressing mode, namely the conventional three-shovel three-time intertillage management and shallow fertilization operation is changed into one-time deep scarification and deep topdressing operation, so operation links are reduced, and the production cost is reduced; the conventional sowing mode is changed into a zero-tillage sowing mode, so the evaporation of soil moisture is reduced, andthe capacity of drought resistance and soil moisture conservation is improved; the conventional mode that harvested low stubbles are crushed to return to a field into a mode that mechanically-harvested high stubbles are rotten naturally to return to the field; and before sowing, seeds are processed by using a plasma seed processing technology to improve the germination percentage of the seeds.
Owner:梨树县农机技术推广总站
Dehumidifying device for hollow stationary blade of steam turbine through heating and blowing
InactiveCN101769175AReduce water erosionSimple structureStatorsMachines/enginesEngineeringHigh pressure
The invention discloses a dehumidifying device for a hollow stationary blade of a steam turbine through heating and blowing. A stationary blade at a moist steam stage of the steam turbine is processed into a hollow blade; a proper position on back arc or inner arc of the hollow stationary blade or an outlet of the stationary blade is provided with a blowing slit; a flow of high-pressure high-temperature steam from a high-pressure section of the steam turbine is introduced into the hollow stationary blade through a valve and a steam inlet pipe; the high-pressure high-temperature steam removes the water film flowing on the surface of the stationary blade under the double action of heating and blowing of the slit so as to reduce the number, diameter size and distribution of secondary water drops at the outlet of the stationary blade. The dehumidifying device of the invention can effectively prevent or relieve water erosion of a movable blade so as to improve the safe running performance of the steam turbine, and has a simple structure and good dehumidification effect.
Owner:XI AN JIAOTONG UNIV
High-steep bare rock slope surface vegetation greening system and construction method thereof
InactiveCN110226446AExtend your lifeAvoid lifeGrowth substratesCulture mediaPlant rootsPlanting seed
The invention discloses a high-steep bare rock slope surface vegetation greening system and a construction method thereof. The system comprises a roughening layer, a transition combination layer, an artificial soil layer, a plant seed layer and a protection layer which are sequentially arranged from bottom to top. By close attachment and combination of the toughening layer, the transition combination layer, the artificial soil layer and the protection layer, a complete vegetation greening system is formed, supply of water and nutrients of a nutrient layer and a plant growth layer suitable fordevelopment of plant root systems is established, so that rock surfaces are firm, the life of the high-steep bare rock slope surface vegetation greening system is prolonged, after several years, plantroot systems are firmly and densely anchored in all layers, and dual functions of greening and slope protection are realized; the problem about the life of the vegetation greening system is solved, rare rock surfaces and artificial soil are combined into a whole by pervious concrete intermediates, slipping of the artificial soil layer from the vegetation greening layer is prevented, and the service life of the vegetation greening system is greatly prolonged.
Owner:刘晟辰
Steam turbine stator with serpentine channel and steam turbine stator heating and dehumidifying device
ActiveCN103437831AReduce water erosionImprove safety and reliabilityStatorsMachines/enginesSerpentine channelStator
The invention relates to a steam turbine stator with a serpentine channel and a steam turbine stator heating and dehumidifying device. The steam turbine stator with the serpentine channel mainly comprises a hollow stator body. At least three partition walls are arranged in the hollow stator body and arranged at intervals in the forward direction and the backward direction along the stator top to the stator root inside the hollow stator body. The tail ends of the partition walls and the inner wall of the stator root or the inner wall of the stator top are arranged at intervals, and a ventilation port is reserved. The serpentine channel used for conduction of air currents is formed in the hollow stator body. The hollow stator body is provided with an air inlet and an air outlet. High temperature steam is guided in from the air inlet, passes strokes of the serpentine channel in sequence and then is guided out of the air outlet. The serpentine channel which is provided with fins used for increasing roughness of an internal air current passageway is designed in the stator to enhance heat exchange, and thus the optimal dehumidifying effect can be achieved by guiding in the least heat.
Owner:STATE GRID CORP OF CHINA +1
Corn straw total crop straw return protective farming method
InactiveCN108476651AEffective protectionReduce wind erosionAgriculture gas emission reductionSoil-working methodsGround temperatureReturn function
The invention discloses a corn straw total crop straw return protective farming method. A corn harvester with the straw crushing and returning function is adopted for harvesting during the autumn harvest in first year, meanwhile, the crushed corn straws are uniformly thrown into the field, and the ground surface is covered; ploughing and soil preparation operation is carried out; stubble ploughing, straw cutting and mix burying, subsoiling, soil preparation, compacting and the like are completed at one time; in the spring period in the second year, direct seeding is carried out, multiple worksuch as fertilization, precision seeding, soil covering, compacting and the like can be completed at one time; a nitrogen fertilizer is applied between the seedlings by a topdressing machine during the growth period of the corns. According to the method, the straw cutting segments are uniformly mixed in the soil of the tilling layer, so that the ground temperature can be improved, the straw rotting is accelerated, the diseases and pests are reduced, and meanwhile a certain surface straw coverage rate can be guaranteed, wind erosion and water erosion are reduced, and the purpose of protecting the soil is achieved, the method is especially suitable for being applied and popularized in regions with low winter and spring temperature in the northeast, and a technical support is provided for large-area popularization and protection of the regions.
Owner:JILIN ACAD OF AGRI MACHINERY
Protection device for building bridge
ActiveCN113389174AEasing bufferAvoid destructionClimate change adaptationBridge structural detailsPierArchitectural engineering
The invention relates to the field of bridge protection, and aims to provide a protection device for a building bridge. The protection device comprises a pier base buffering mechanism arranged at a pier base of a foundation pier and a pier body buffering mechanism arranged on a pier body of the foundation pier located on the water surface; the pier body buffering mechanism comprises a buffering cylinder fixed to the pier body in a sleeving mode; the buffering cylinder comprises an upper fixing ring, a lower fixing ring and force unloading rollers, wherein the upper fixing ring and the lower fixing ring are fixed to the pier body, and the force unloading rollers are arranged outside the portion, between the upper fixing ring and the lower fixing ring, of the pier body; the multiple layers of force unloading rollers are arranged from inside to outside, and a plurality of overflowing holes are evenly distributed in the force unloading rollers; and the upper ends and the lower ends of the force unloading rollers are connected with the upper fixing ring and the lower fixing ring to form rotating fit. According to the protection device, buffering of water flow to the pier body can be effectively relieved, the water erosion effect is reduced, the pier body of the foundation pier is prevented from being damaged by water erosion, and the safety of the foundation pier and the whole bridge is improved.
Owner:郑州市路通公路建设有限公司
No-tillage water replenishing sowing method based on condition of total straw coverage
InactiveCN109691365ASolve the amount of applicationGuarantee seedling qualityCereal cultivationWater sourceEarth surface
The invention discloses a no-tillage water replenishing sowing method based on a condition of total straw coverage. In areas of rainfall below 450 mm and in areas of aeolian sandy soil or severe areasof wind erosion, the method includes the following specific steps: after corn enters a stage of complete ripeness, a large-scale corn harvester is employed for harvesting, and corn stalk is simultaneously pulverized and uniformly spread on the earth surface; during suitable sowing time from the last ten days of April to the first ten days of May of the following spring, straw covering the earth surface of sowing rows is cleaned out a sowing zone with the width of 40 cm to reach a to-be-sowed state; sowing, water replenishing, fertilizer application, and pressing are completed once on a cleaned sowing zone by employing a no-tillage water replenishing sowing machine; and after seedlings emerge, a herbicide is sprayed for weeding; and when the corn has 3-4 expansion leaves, soil under corn seedlings is loosened. Compared with the prior art, high-quality sowing can be achieved under the condition that the straw totally covers and is returned to the field, a sufficient water source is provided for seed germination according to a soil moisture state, the quality of a group seedling stage is ensured, and the usage amount of the herbicide is reduced.
Owner:JILIN ACAD OF AGRI SCI
Movable permeable pile spur dike and operation method
The invention discloses a movable permeable pile spur dike and an operation method thereof. The movable permeable pile spur dike comprises a fixed rail, a plurality of moving rails, a plurality of movable permeable piles,a plurality of pressure sensors and flow meters and a control platform, wherein the plurality of movable permeable piles are arranged on the fixed rail and the plurality of movingrails, the plurality of pressure sensors and flow meters are arranged at monitoring points on the outer side walls of the movable permeable piles. The control platform carries out analysis and calculation according to monitoring data from the pressure sensors and the flow meters and adjusts the positions of the moving rails and the movable permeable piles, so that the water flow speeds and the spur dike pressures at the monitoring points are smaller than corresponding flow speed threshold values and pressure threshold values; and therefore, the spur dike permeable rate is within a set range.The movable permeable pile spur dike has the advantages that the movable permeable pile spur dike is suitable for various river conditions, the water permeability of the spur dike and the form of a spur dike body are adjusted in a self-adaptive mode according to the change of the water flow speed and the pressure borne by the dike body, and the stability and the eco-friendly application effect ofthe spur dike are effectively improved.
Owner:HOHAI UNIV +1
Steam turbine low-pressure final-stage temperature field prediction method and device
PendingCN112149060AAccurate measurementEfficient measurementCharacter and pattern recognitionMachines/enginesData setProcess engineering
The invention provides a steam turbine low-pressure final-stage temperature field prediction method and device, and the method comprises the steps: carrying out the screening of obtained historical operation state parameters of a steam turbine, and obtaining a historical operation state parameter sample set and a target parameter temperature field data set; training the historical operation stateparameter sample data set and the target parameter temperature field data set by using a K nearest neighbor algorithm to obtain neighbor sample parameters; and generating a turbine low-pressure final-stage temperature field prediction value corresponding to the current running state parameter according to the obtained current running state parameter of the turbine and the neighbor sample parameter. According to the steam turbine low-pressure final-stage temperature field prediction method and device, the steam turbine low-pressure final-stage temperature field prediction value can be generatedaccording to the current operation state parameters of the steam turbine low-pressure cylinder so that the water spraying amount in the low-pressure cylinder can be reasonably adjusted subsequently,and water erosion to final-stage blades caused by water spraying can be reduced.
Owner:NORTH CHINA ELECTRICAL POWER RES INST +2
Degradation type multifunctional substrate for planting and preparation method thereof
InactiveCN107162859AImprove water retentionImprove survival rateCultivating equipmentsOrganic fertilisersSodium BentoniteAbsorption capacity
The invention discloses a degradation type multifunctional substrate for planting and a preparation method thereof. The degradation type multifunctional substrate is mainly prepared from raw materials in parts by weight as follows: 20-60 parts of crop straw, 20-60 parts of bentonite, 10-30 parts of attapulgite, 0.1-3 parts of polyacrylamide and 1-3 parts of pregelatinized starch, wherein the crop straw is crushed and fermented before being used. The substrate for planting has good water absorption capacity, water retentivity and water releasing property, can improve desertified land and enhance the drought resistance of crops and contain a large quantity of microelements suitable for plant growth; the wall of the substrate for planting has moderate strength and shelling is not required after seedling raising; the substrate cannot damage roots or seedlings, is convenient to transport, facilitates integrated planting, can be naturally degraded in soil, causes no pollution to the soil, has a certain fertility improvement function, is beneficial to plants and the soil, contributes to improvement of natural environment and promotes ecological development.
Owner:潍坊华夏膨润土有限公司
Corn planting method
The invention discloses a corn planting method. After corn is harvested each time, the corn is aired in the sunning ground which comprises an inverted-Y-shaped canopy frame formed by erecting bamboo poles. The longitudinal section of the inverted-Y-shaped canopy frame is in a triangle shape, the distance from the top end of the triangle to the bottom edge is 3.5 m, the bottom edge is 6 m long, and the bottom of the inverted-Y-shaped canopy frame is square and is 6 m wide. In the bottom, the length of the edge adjacent to the bottom edge is in direct proportion to the planting area of corn and is arranged to be 5m / hm<2>. The top and the periphery of the inverted-Y-shaped canopy frame are fixedly covered by thin films with the thickness being 8*10<-5>-15*10<-5> m. The closed sunning ground is arranged, the greenhouse function of the sunning ground greatly reduces the number of corn which mildews, rots and goes bad due to plum rains, loss of corn harvested each time is reduced, and the yield of corn is increased.
Owner:GUANGXI POLYTECHNIC
Ultra-high-pressure 200 MW low-pressure cylinder zero-output flexible transformed steam turbine
PendingCN110259527AReduce water erosionGuaranteed cooling effectBlade accessoriesSteam useUltra high pressureEngineering
The invention discloses an ultra-high-pressure 200 MW low-pressure cylinder zero-output flexible transformed steam turbine, and belongs to the technical field of steam turbines. The ultra-high-pressure 200 MW low-pressure cylinder zero-output flexible transformed steam turbine aims to solve the problems of dynamic stress risk, blast risk and water erosion risk caused by low-pressure cylinder zero-output flexible peak adjustment transformation. The steam turbine comprises a high-pressure cylinder, a medium-pressure cylinder, a low-pressure cylinder, a low-pressure cooling steam system, a heating and steam extraction system and a low-pressure cylinder water spraying system, wherein a medium-and-low-pressure communicating pipe is arranged between the medium-pressure cylinder and the low-pressure cylinder, a heating and steam extraction connecting port, a low-pressure cylinder cooling steam outlet, a butterfly valve and a low-pressure cylinder cooling steam inlet are sequentially arranged on the medium-and-low-pressure communicating pipe in the steam outlet direction, a steam inlet of the low-pressure cooling steam system is connected to the low-pressure cylinder cooling steam outlet, a steam outlet of the low-pressure cooling steam system is connected to the low-pressure cylinder cooling steam inlet, a steam inlet of the heating and steam extraction system is connected to the heating and steam extraction connecting port, and the low-pressure cylinder water spraying system is used for carrying out water spraying and temperature reduction on a last-stage movable blade of the low-pressure cylinder. The ultra-high-pressure 200 MW low-pressure cylinder zero-output flexible transformed steam turbine is mainly used for the field of steam turbine transformation.
Owner:HARBIN TURBINE
Ecological protection system suitable for pipeline in soil channel area
InactiveCN111910652AImprove survival rateReduce water erosionAlkali orthophosphate fertiliserAmmonium orthophosphate fertilisersPolyesterFiber
The invention relates to the technical field of pipeline protection, and discloses an ecological protection system suitable for a pipeline in a soil channel area. The ecological protection system comprises a matrix layer, a buffer layer, a transition layer, a root blocking layer and a soil backfill layer which are sequentially arranged from top to bottom, wherein a pipeline is buried in the soil backfill layer; the matrix layer comprises a matrix granular material and soil; the buffer layer comprises soil, sucrose residues, calcium bentonite, super absorbent resin and bamboo fibers; the transition layer comprises soil, trichoderma fungi residues and quartz sand; and the root blocking layer comprises water-soluble polyester emulsion, copper sulfate powder, a leucaena glauca extracting solution and glass fibers. According to the ecological protection system, the comprehensive protection function of a plant system can be utilized, the water erosion and collapse phenomena after pipeline landfill are reduced, the external impact force and the damage effect of plant root systems on the pipeline are reduced, therefore, the pipeline is continuously and stably protected under the pipe-freeprotection condition, and the survival rate of plants can be increased.
Owner:国家管网集团重庆天然气管道有限责任公司
Paddy field wheat straw coverage no-tillage cultivation technology
InactiveCN105027936AReduce water erosionReduce wind erosionCultivating equipmentsPlant cultivationEcological environmentOrganic matter
The invention discloses a paddy field wheat straw coverage no-tillage cultivation technology. The technology comprises the steps of firstly, selecting a paddy field; secondly, preparing straw; thirdly, arranging the field; fourthly, sowing seeds; fifthly, covering the seeds with the straw; sixthly, managing the field; seventhly, preventing and controlling diseases and pests. The technology has the advantages that the ecological environment is protected, water corrosion and wind corrosion of soil are reduced, labor intensity is lowered, expenses are saved, soil nutritional structure is improved, soil water and organic matter loss is prevented, fertility is improved, weeds, diseases and pests are effectively controlled, and the yield of crops is increased.
Owner:李印
An ecological protection system suitable for pipelines in stone trenches
ActiveCN111895178BImprove survival rateReduce water erosionPipe laying and repairGrowth substratesEnvironmental resource managementPlant roots
The invention discloses the technical field of pipeline protection, and discloses an ecological protection system suitable for pipelines in stone channel areas, comprising a matrix layer, a buffer layer, a transition layer, a root resistance layer and a gravel layer arranged in sequence from top to bottom A backfill layer, wherein the pipeline is buried in the gravel backfill layer; wherein, the matrix layer includes matrix particulate material and gravel; the buffer layer includes gravel, attapulgite, peat, superabsorbent resin and polypropylene amide; the transition layer includes gravel and bacillus slag; the root resistance layer includes acrylate emulsion, copper sulfate powder, leucaea extract and vermiculite; the ecological protection system can utilize the comprehensive protection function of the plant system, It can reduce the water erosion and collapse phenomenon after the pipeline is buried, reduce the external impact force and the damage of plant roots to the pipeline, so as to continuously and stably protect the pipeline under the condition of no pipe protection, and can also improve the survival rate of plants.
Owner:国家管网集团重庆天然气管道有限责任公司
Water erosion reducing highly-sealed centrifugal sand pump and working method thereof
ActiveCN111550445ARelieve pressureAvoid damageSpecific fluid pumpsPump componentsImpellerDrive shaft
The invention discloses a water erosion reducing highly-sealed centrifugal sand pump. The sand pump comprises a pump shell, a motor shaft, an outer magnetic rotor, an isolation sleeve, an inner magnetic rotor, a transmission shaft, an impeller, an end cover, a feeding port, a discharging port and a flow slowing mechanism; the feeding port is formed in the center of the end cover, and the discharging port is formed in the side edge of the end cover; and the flow slowing mechanism is arranged on the feeding port, and the flow slowing mechanism comprises a flow slowing shell, a flow slowing groove, a flow slowing stop block and a flow slowing spring, wherein the flow slowing shell is fixedly arranged on the feeding port, the flow slowing groove is formed in the flow slowing shell, the flow slowing spring is fixedly arranged in the flow slowing groove, and the flow slowing stop block is arranged at one end of the flow slowing spring. According to the sand pump, on one hand, a buffering structure is adopted for the inner wall of a device, so that the pressure of fluid on the device is reduced, the damage to the device is reduced, and the service life of the device is long; and on the other hand, the pressure near a feeding pipe is increased, so that the cavitation problem is solved, the working quality of the device is improved, the device is not prone to being damaged, and the service life is long.
Owner:新沂市利源机械有限公司
Last stage vane of steam turbine and preparation method thereof
ActiveCN101566077BNo damage phenomenonGood water corrosion resistanceBlade accessoriesVacuum evaporation coatingCeramic compositeCeramic coating
The invention discloses a last stage vane of a steam turbine and a preparation method thereof. The last stage vane of the steam turbine comprises a last stage vane substrate which is subjected to thermal refining; the last stage vane substrate is bonded with a chrome-based ceramic coating which consists of a bonding layer, a water-erosion resistance layer and a waterproof layer. The last stage vane has reasonably designed coating structure; and the prepared chrome-based ceramic composite coating has excellent bonding force, high hardness (30GPa) and excellent water-erosion resistance and better water-erosion resistance performance than that of the non-coated vane, greatly prolongs the service life of the last stage vane and generates no pollutions during the preparation process.
Owner:湖南省湘电锅炉压力容器检验中心有限公司 +2
Method for constructing composite river bottom protection with steel sheet piles and soft mattresses for artificial island
InactiveCN101581083BEnsure structural safetyReduce washoutMarine site engineeringBulkheads/pilesWater flowEngineering
Owner:CHINA COMM 2ND NAVIGATIONAL BUREAU 3RD ENG
A Method for Monitoring and Identifying Water Erosion Defects of Steam Turbine Blades
ActiveCN110887899BReduce impactExtended service lifeAnalysing solids using sonic/ultrasonic/infrasonic wavesProcessing detected response signalData setImpact velocity
The invention discloses a water erosion defect monitoring and recognition method of a turbine blade. The method comprises the steps of sampling, modeling, and warehousing and actual operation analysis. At the step of sampling, modeling, and warehousing, experimental measurement, numerical simulation and data training are performed successively. An accelerated water erosion experiment consistent with an actual operation condition is carried out on a material to obtain a function relational expression of influences of an impact angle, an impact speed and the like on a water erosion defect feature size; on the basis of the relational expression, a blade vibration model with water erosion defects is established and a water erosion defect combination X-vibration signal oscillogram Y database isestablished; and a data set is integrated and divided, neural network training is performed, and a water erosion defect evaluation mechanism is established. At the step of actual operation analysis,a blade vibration signal oscillogram needs to be collected on site, an analysis library is compared, the set operation safety is evaluated, and a corresponding operation and maintenance scheme is formulated. According to the invention, the abnormal vibration of the blade in actual operation can be monitored in real time; the data support can be provided for the set fault diagnosis; the safe operation of the set can be guaranteed; and huge economic losses caused by blade accidents are reduced.
Owner:XI AN JIAOTONG UNIV
Rotary loosening device for no-till seeder
InactiveCN104126341BSave powerReasonable structural optimizationSpadesSaving energy measuresSeederScarification
The invention provides a rotary type scarification device for a no-till sowing machine, and belongs to the technical field of agricultural machinery. The rotary type scarification device mainly aims to achieve the purposes of deep scarification, correct placement and deep placement, comprises a rack and a gutter-plough for fertilization and is characterized by further comprising a transmission speed change assembly arranged in the middle of the rack, a scarification knife assembly which is arranged on the rack and is located in front of the gutter-plough for fertilization and a front soil processing device, the scarification knife assembly comprises a short scarification knife and a long scarification knife which are vertically parallel to each other and arranged side by side, a first set of curved knife teeth at the lower end of a long knife rod of the long scarification knife are curved downwards and are fixedly connected to the long knife rod, other sets of curved knife teeth are curved upwards, are arranged at intervals in the length direction of the long knife rod and are in occlusion with downward-curved knife teeth of the short scarification knife, and the long scarification knife can go deep into the soil by 200 mm to 300 mm in the length direction. The transmission speed change assembly converts the horizontal power for pulling a device into the rotating force of the scarification knife assembly in the vertical direction.
Owner:SHANXI JINGZHUN ENVIRONMENTAL TECH
A method for utilization of waste heat using converter waste heat steam comprehensive utilization system
InactiveCN104132552BDecreaseImprove efficiencyEnergy industryIncreasing energy efficiencyEngineeringSuperheated steam
Provided is a converter waste heat steam comprehensive utilization system. A steam-water separator is additionally arranged at the position, before entering a steam turbine, of one side of a steam pipeline, one way of superheated steam is led in from a steam main pipe of a factory and fed into the position, located in front of the steam-water separator, of the steam pipeline, the led-in superheated steam and saturated steam generated by a heat accumulator are mixed before entering the steam-water separator, it is guaranteed that the superheat degree of the steam is above 5 degrees, and the steam is conveyed backwards; the heat accumulator is additionally arranged in the part, before the position where the superheated steam is led in, of the steam pipeline. Meanwhile, the invention discloses a converter waste heat steam comprehensive utilization method. When the converter waste heat steam comprehensive utilization system runs normally, the steam dose not need to pass through the steam-water separator, resistance can be reduced, the enthalpy value reduction amount of the steam obtained after the steam passes through the steam-water separator can be reduced, the overall efficiency of a steam-turbine generator can be improved, water erosion of a last stage blade of the steam turbine can be greatly reduced, and safe and efficient operation of the steam turbine can be guaranteed. Meanwhile, the influence on operation safety of the steam turbine of the superheated steam at 5 superheat degrees is avoided, and steam parameters are increased.
Owner:SHANDONG HUANNENG DESIGN INST
How to grow corn
The invention discloses a corn planting method. After corn is harvested each time, the corn is aired in the sunning ground which comprises an inverted-Y-shaped canopy frame formed by erecting bamboo poles. The longitudinal section of the inverted-Y-shaped canopy frame is in a triangle shape, the distance from the top end of the triangle to the bottom edge is 3.5 m, the bottom edge is 6 m long, and the bottom of the inverted-Y-shaped canopy frame is square and is 6 m wide. In the bottom, the length of the edge adjacent to the bottom edge is in direct proportion to the planting area of corn and is arranged to be 5m / hm<2>. The top and the periphery of the inverted-Y-shaped canopy frame are fixedly covered by thin films with the thickness being 8*10<-5>-15*10<-5> m. The closed sunning ground is arranged, the greenhouse function of the sunning ground greatly reduces the number of corn which mildews, rots and goes bad due to plum rains, loss of corn harvested each time is reduced, and the yield of corn is increased.
Owner:GUANGXI POLYTECHNIC
Electrical automation instrument protection device
InactiveCN112378472AImprove accuracyExtended service lifeVolume meteringVibration amplitudeStructural engineering
The invention discloses an electrical automation instrument protection device which comprises a supporting plate, a box body is fixedly arranged on the supporting plate, damping devices are symmetrically and fixedly arranged on the upper inner wall and the lower inner wall of the box body, each damping device comprises a first fixing plate, a first spring and a second fixing plate, and the first fixing plates are installed on the upper inner wall and the lower inner wall of the box body. The two first springs are fixedly arranged on the side, away from the inner wall of the box body, of the first fixing plate, the second fixing plates are fixedly arranged at the ends of the sides, away from the first fixing plate, of the first springs, and first semi-annular plates are fixedly arranged atthe two ends of the first fixing plate. The device has the advantages that the vibration amplitude of the annular protective frame is reduced, the vibration amplitude of a flow meter is reduced, the reading accuracy of the meter is improved, the service life of the meter is prolonged, and the effects of damping and protecting the flow meter are achieved.
Owner:XIAN LANXIN IND AUTOMATION ENG CO LTD
A high-seal centrifugal sand pump and its working method for reducing water erosion
ActiveCN111550445BReduce water erosionAvoid damageSpecific fluid pumpsPump componentsImpellerElectric machinery
The invention discloses a high-seal centrifugal sand pump for reducing water erosion, which comprises: a pump casing, a motor shaft, an outer magnetic rotor, an isolation sleeve, an inner magnetic rotor, a transmission shaft, an impeller, an end cover, a material inlet, a material outlet and a buffer. Flow mechanism, the center of the end cover is provided with a feed port, and the side of the end cover is provided with a discharge port; the feed port is provided with a slow flow mechanism, and the slow flow mechanism includes a slow flow shell, a slow flow groove, a slow flow block and a slow flow spring , the circulation casing is fixedly arranged on the feed inlet, and a slow flow groove is arranged in the slow flow casing, and a slow flow spring is fixedly arranged in the slow flow groove, and a slow flow stopper is arranged at one end of the slow flow spring; on the one hand, the inner wall of the equipment is adopted The buffer structure reduces the pressure of the fluid on the equipment, reduces the damage of the equipment, and has a long service life. On the other hand, it increases the pressure near the feeding pipe, solves the problem of cavitation, improves the working quality of the equipment, and the equipment is not easy to damage and has a practical life. high.
Owner:新沂市利源机械有限公司
Steam turbine stator with serpentine channel and steam turbine stator heating and dehumidifying device
ActiveCN103437831BReduce heatImprove dehumidification effectStatorsMachines/enginesSerpentine channelEngineering
The invention relates to a steam turbine stator with a serpentine channel and a steam turbine stator heating and dehumidifying device. The steam turbine stator with the serpentine channel mainly comprises a hollow stator body. At least three partition walls are arranged in the hollow stator body and arranged at intervals in the forward direction and the backward direction along the stator top to the stator root inside the hollow stator body. The tail ends of the partition walls and the inner wall of the stator root or the inner wall of the stator top are arranged at intervals, and a ventilation port is reserved. The serpentine channel used for conduction of air currents is formed in the hollow stator body. The hollow stator body is provided with an air inlet and an air outlet. High temperature steam is guided in from the air inlet, passes strokes of the serpentine channel in sequence and then is guided out of the air outlet. The serpentine channel which is provided with fins used for increasing roughness of an internal air current passageway is designed in the stator to enhance heat exchange, and thus the optimal dehumidifying effect can be achieved by guiding in the least heat.
Owner:STATE GRID CORP OF CHINA +1
Deep peak regulation method for high-back-pressure unit
The invention discloses a deep peak regulation method for a high-back-pressure unit, and relates to the field of deep peak regulation. The deep peak regulation method comprises the following steps that the deep peak regulation safety of the high-back-pressure unit is evaluated on the basis of blast risk evaluation of a last-stage blade of a low-pressure cylinder during low load; the heat supply steam extraction amount is increased by turning down a heat supply quick-opening valve, and the heat supply capacity of an extraction condensing unit is further improved; the steam supply potential of the extraction condensing unit is deeply excavated on the basis of turning down a medium-pressure control valve and improving reheat steam pressure; and the heat supply amount, the heat supply return water temperature and the steam supply amount of the whole plant on the day are obtained through the average environment temperature on the day, and a deep peak regulation load optimal distribution model is established. According to the deep peak regulation method for the high-back-pressure unit, the high tripping value of the exhaust steam temperature of the high-back-pressure unit of a power plant is set to be 125 DEG C, the safety is guaranteed, favorable support is provided for development of deep peak regulation work, and after high-back-pressure transformation, a path of accident water spraying is added under the condition that an original low-pressure cylinder accident water spraying pipeline is reserved, so that the air blowing phenomenon possibly generated by the unit after deep peak regulation is avoided.
Owner:HUANENG POWER INT INC
A device for generating high-speed intercepting jets by using a rotating disc with holes
ActiveCN111022132BAnalyze damageFlexible designBlade accessoriesMachines/enginesCircular discJet flow
The invention discloses a device capable of using a rotary hole disc to generate a high-speed cut-off jet flow. The device comprises a fixed wheel disc, multiple wheel disc round holes which are usedfor ensuring smooth passing of the cut-off jet flow and act on samples are evenly formed in the fixed wheel disc in the circumferential direction, semi-disc round holes corresponding to the wheel discround holes are formed in a hole semi disc, in the research state, a high-pressure water pump outlet is connected with a spraying nozzle inlet, a work wheel disc is arranged on a spindle in a sleeving manner, the material samples are mounted on the work wheel disc in the circumferential direction, the semi-disc round holes, the wheel disc round holes and the material samples are in one-to-one corresponding in position, and are kept consistent with the spraying nozzle positions in height, and when the spindle rotates, the fixed wheel disc and the work wheel disc are driven to synchronously rotate. Conversion of a high-speed continuous jet flow to the cut-off jet flow in the steam turbine blade water erosion research process can be achieved, the process of repeated collision of a single water drop and the blade surface in steam turbine blade water erosion can be simulated, quantitative test data about the erosion frequency of the water drops to the samples can be obtained, and the watererosion resistance property differences of different materials can be conveniently and subsequently analyzed and compared.
Owner:XI AN JIAOTONG UNIV
Steam-free passing water cooler
ActiveCN102671977BEnsure personal safetyImprove on-site operating conditionsWork treatment devicesMetal rolling arrangementsSteam condensationEngineering
Owner:湖南天益高技术材料制造有限公司
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