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45results about How to "Experimental safety" patented technology
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Energetic semiconductor bridge and preparation method thereof
InactiveCN104976925AShorten the diffusion mass transfer distancePrevent exposure to oxidationMaterial nanotechnologyBlasting cartridgesSputteringComposite film
The invention discloses an energetic semiconductor bridge and a preparation method thereof. The energetic semiconductor bridge comprises a semiconductor bridge substrate and a 3DOM (Three-Dimensionally Ordered Macroporous) metal oxide nano-thermite film prepared on the semiconductor bridge substrate. The preparation method comprises the steps that a PS microsphere emulsion is prepared; metal oxide precursor liquid is prepared; the PS microsphere emulsion is dropwise added onto the semiconductor bridge substrate and dried; PS microspheres deposits naturally to form a colloidal crystal template; the metal oxide precursor liquid is dropwise added onto the colloidal crystal template, permeates through the colloidal crystal template, and is dried to form a PS microsphere / precursor liquid composite film; the PS microsphere / precursor liquid composite film is put in a muffle furnace to be calcined for PS colloidal crystal template removal, and a 3DOM metal oxide skeleton is produced; the 3DOM metal oxide skeleton on the semiconductor bridge substrate is aluminized with the adoption of magnetron sputtering; and the semiconductor bridge containing the 3DOM metal oxide nano-thermite film is obtained. The energetic semiconductor bridge is mild in preparation condition, and the prepared energetic semiconductor bridge has the advantages of high ignition quantity and long ignition time.
Owner:NANJING UNIV OF SCI & TECH
Preparation method for NiCoP nano material
InactiveCN104743533ALow reaction temperatureReduce energy consumptionMaterial nanotechnologyPhosphidesNickel saltAlcohol
The invention discloses a preparation method for a NiCoP nano material. The preparation method comprises the following steps: dissolving a nickel salt and a cobalt salt into a beaker with deionized water in proportion, and stirring until the nickel salt and the cobalt salt are completely dissolved; then, heating and evaporating on the stirrer until the nickel salt and the cobalt salt are completely dried to obtain a product; putting the product into a muffle furnace, and roasting to obtain black powder; sufficiently mixing the black powder with a certain amount of phosphor salt, and heating in the presence of N2 in a high-temperature tubular furnace to react, thereby obtaining a NiCoP nano material crude product; respectively washing the NiCoP nano material crude product with deionized water and absolute ethyl alcohol in sequence, and putting the washed product into a vacuum drying oven, and drying, thereby obtaining the NiCoP nano material. The preparation method has the advantages of being low in energy consumption, low in cost, simple and convenient in reaction condition, high in safety coefficient, and the like.
Owner:SHAANXI UNIV OF SCI & TECH
Multifunctional adjustable monkey chair
InactiveCN101249026AFacilitate surgeryEasy to operateAnimal fetteringEngineeringScientific experiment
The invention discloses a multifunctional adjustable monkey chair, comprising a chair space surrounded by a lateral plate, a front plate and a back plate and allowing an experimental animal entering inside, and an upper plate and a head fixing plate installed above the chair space, wherein a plurality of fixing grooves are installed on the inner side of the lateral plate, and a groove is opened on the inner side of the fixing groove for installing matched plug-in units; and a rotary fixed element is installed on the outer side of the lateral plate and connected with a positioning rack for adjusting the position of the positioning rack. The monkey chair can be adjusted according to experimental conditions; and is suitable for scientific experiments on primates with different ages and shapes. The inventive monkey chair has the advantages of good commonality and convenient installation.
Owner:INSITUTE OF BIOPHYSICS CHINESE ACADEMY OF SCIENCES +1
Method for preparing graphene / carbon nanotube composite material
ActiveCN106241782AImprove composite uniformityControllable parametersMaterial nanotechnologyMulti-walled nanotubesIonCvd graphene
The invention discloses a method for preparing a graphene / carbon nanotube composite material. Graphene oxide can be obtained from graphite powder as a raw material by a modified Hummers method; the graphene oxide and deionized water are added into a beaker for ultrasonic dispersion, then nickel nitrate hexahydrate and hexamethylenetetramine are added and evenly fully mixed; the solution is transferred into a reaction kettle for a period of time of reaction at constant temperature, after the reaction is finished, enough hydrochloric acid with the concentration of 1mol / L is added for dissolution of nickel hydroxide, and after filteration by suction, a black solid is taken, and dried in vacuum to obtain the graphene / carbon nanotube composite material. Lens results show that the carbon nano tube size distribution is in 15-40nm, the carbon nano tube lengthis micron-scale, and the carbon nano tubes are dispersed in the system so as to realize the graphene and carbon nano tube homogeneous compounding.
Owner:ANHUI UNIV OF SCI & TECH
Generator stator bar hot water flow experiment simulation device and experimental method
ActiveCN106500996AEasy to operateThe experimental operation is simple and convenientEngine testingExperimental methodsWater flow
The invention discloses a generator stator bar hot water flow experiment simulation device and an experimental method. The generator stator bar hot water flow experiment simulation device comprises a stator bar, a hot water loop, a cold water loop, temperature measuring elements and a data acquisition device, wherein a water inlet end of the stator bar is connected with water outlets of the hot water loop and the cold water loop, a water outlet pipeline of the stator bar is connected with a main loop water pump, and the main loop water pump is connected water inlets of the hot water loop and the cold water loop; the water inlet end of the stator bar is provided with a flowmeter, the water inlet ends and the water outlet ends of the hot water loop, the cold water loop and the stator bar are provided with the temperature measuring elements, and the data acquisition device acquires test values of all the temperature measuring elements and the flowmeter. The generator stator bar hot water flow experiment simulation device simulates the field test completely, operates all the test processes in situ, is simple, convenient, real-time and efficient, and is of very important significance to the intensive study of test factors such as flow, environment temperature and temperature difference on test effects and stability and the formation of scientific and practical test system and criteria.
Owner:ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +2
High-grade biosafety protection type air propagation experimental device for pathogens of medium and small animals
PendingCN111011221AReduce the spreadExperimental safetyAnimal housingBiosafety cabinetMechanical engineering
The invention discloses a high-grade biosafety protection type air propagation experimental device for pathogens of medium and small animals. The high-grade biosafety protection type air propagation experimental device can be used for carrying out a droplet propagation experiment on the medium and small animals such as rats, mice, martens and rabbits. The high-grade biosafety protection type air propagation experimental device comprises a biosafety cabinet, wherein the biosafety cabinet comprises an exposure cavity for accommodating healthy animals and bacteria-carrying animals; a sealed experimental box is arranged in the exposure cavity; the healthy animals and the bacteria-carrying animals are placed in the experimental box; the biosafety cabinet is provided with an air supply filteringdevice and an air exhaust filtering device; the air supply filtering device is used for supplying air into the exposure cavity; the air exhaust filtering device is used for purifying air in the exposure cavity and exhausting the air; the experimental box comprises an air inlet and an air outlet; the air inlet communicates with the air supply filtering device; and the air outlet communicates withthe air exhaust filtering device. According to the technical key points, the experimental animals are placed in the experimental box and the propagation experiment is not directly carried out in the biosafety cabinet, so that the pollutant diffusion range is reduced and the experiment is safer; and the section of the droplet propagation experimental box is small and an accurate experimental resultis easy to obtain.
Owner:ACADEMY OF MILITARY MEDICAL SCI +1
Solvent-assisted SAGD three-dimensional physical simulation experiment method and device
ActiveCN104948153ASteady injectionStable pressureFluid removalVapor–liquid separatorProcess engineering
The invention provides a solvent-assisted SAGD three-dimensional physical simulation experiment method and device. The device comprises an injection device, a simulated oil reservoir model and a recycling device, a first pump unit in the injection device is communicated with a piston container unit, a second pump unit is communicated with a steam generator, the piston container unit and the steam generator are communicated with a gas injection well of the simulated oil reservoir model respectively, one end of a first condenser of the recycling device is communicated with a production well of the simulated oil reservoir model while the other end of the same is communicated with a feeding port of a gas-liquid separator, a second condenser is communicated with a liquid outlet of the gas-liquid separator, a third condenser is communicated with a gas outlet of the gas-liquid separator, a raw oil and water collection container is connected with the second condenser, and a solvent recycling container is connected with the third condenser. By the method and the device, mining conditions of solvent-assisted SAGD technology can be simulated, and mechanism of solvent in the process of SAGD can be studied so as to optimize and improve existing solvent-assisted SAGD technology according to oil reservoir conditions.
Owner:PETROCHINA CO LTD
Experimental teaching equipment with gas exchange function
InactiveCN105289788AImprove ventilation effectExperimental safetyLaboratory benches/tablesChemical storageWastewater
The invention discloses experimental teaching equipment with a gas exchange function. The experimental teaching equipment comprises an equipment main body, wherein a corrosion-resistant top plate is arranged at the upper end of the equipment main body; a heat-insulating plate is arranged on the corrosion-resistant top plate; an object placing disk and a water tank are arranged at the two ends of the heat-insulating plate respectively; a tap is arranged on the side face of the water tank; a gas exchange device is arranged at the upper end of the corrosion-resistant top plate; an object collection cabinet, a chemical storage cabinet and a waste water collecting chamber are arranged at the lower end of the equipment main body; the object collection cabinet comprises a pulling cabinet; a test tube frame, hooks and a collecting tank are arranged inside the pulling cabinet; the chemical storage cabinet comprises sealed pulling cabinets and a refrigeration box; the waste water collecting chamber comprises an opening and closing door; a cavity is arranged in the equipment main body inside the opening and closing door; a wastewater collecting tank is arranged inside the cavity; the equipment main body is provided with corrosion-resistant transparent glass plates; the upper ends of the corrosion-resistant transparent glass plates are movably connected with the equipment main body through rotating shafts; the corrosion-resistant transparent glass plates are provided with buckles. The experimental teaching equipment is comprehensive in function, convenient and safe to use, and good in gas exchange effect.
Owner:SICHUAN DONGSHAN TEACHING AID
Biomass enzymolysis and saccharification pretreatment method
The invention relates to a biomass enzymolysis and saccharification pretreatment method, which comprises the following steps of: mixing an aired wood fiber biomass raw material and alkalescent solution, preimpregnating, decatizing at the temperature of between 160 and 190 DEG C, keeping the temperature for 120 to 240 minutes, and heating for 30 to 60 minutes; performing two-section defibrination on the decatized slurry, wherein in a first section, a gap of an abrasive disc is between 0.3 and 0.4 millimeter, and in a second section, a gap of the abrasive disc is between 0.1 and 0.15 millimeter; and adding cellulose into slurry subjected to the defibrination, and performing enzymolysis to obtain enzymolysis saccharification liquid. In the biomass enzymolysis and saccharification pretreatment method, the biomass raw material is pretreated by a pretreatment method of combining thermochemistry and machinery, and is subjected to enzymolysis and saccharification; and by analyzing ingredients of the enzymolysis liquid, the yield of saccharide in the enzymolysis liquid is high, and subsequent fermentation inhibitors such as furfuraldehyde, acetic acid and the like are avoided.
Owner:SOUTH CHINA UNIV OF TECH
Coaxial contra-rotating terrestrial magnetism energy storage and release delivery ground experiment system and method
ActiveCN113075592AReduce power consumptionSmall sizeCosmonautic condition simulationsThree-component magnetometersTarget reachingMechanical engineering
The invention discloses a coaxial contra-rotating terrestrial magnetism energy storage and release delivery ground experiment system, which comprises a supporting through shaft and a magnetic moment generation device, and is characterized in that a first target delivery assembly and a second target delivery assembly are coaxially and rotatably mounted on the supporting through shaft, and are both used for mounting and releasing a delivery target; the working method comprises the steps that the first target delivery assembly and the second target delivery assembly are configured to receive a rotation starting signal of the magnetic moment generation device, then rotate oppositely with the supporting through shaft as a rotating shaft, and when the linear speed of a delivery target reaches the linear speed set by the system, the first target delivery component or the second target delivery component releases the delivery target. According to the invention, two sets of delivery devices rotate coaxially and oppositely, so that the air resistance moment in a ground experiment can be overcome, and the restriction that the target linear velocity has an upper limit is relieved, thereby being better used for ground principle verification of a terrestrial magnetism energy storage method.
Owner:INST OF MECHANICS - CHINESE ACAD OF SCI +1
Industry-university-research combined scene type remote experiment teaching device and design method
InactiveCN111932970AExtended presentationImprove understandingCosmonautic condition simulationsSimulatorsMathematical modelHuman–computer interaction
The invention discloses an industry-university-research combined scene type remote experiment teaching device and a design method, and belongs to the field of scene type remote experiments. The builtexperiment environment includes a mathematical model of an experiment object, a three-dimensional scene, a simulator, a production data synchronizer and the like. The method comprises establishing anexperiment server, connecting links required by the experiment system through information data intercommunication, then, through a data interface of an experiment server, fusing the experiment systeminto a cloud server cluster, then connecting the experiment system to different user side platforms through the cloud server cluster, by a user, operating on a user side interface, and transmitting anoperation instruction to the remote experiment device through a network, so that the purpose of remotely controlling the experiment system is achieved. According to the invention, medium and large-scale equipment, scenes and experiment projects with high risk required in the traditional experiment are combined into the network remote experiment, so that an operator can carry out remote experimentoperation through the user side platform. The presentation form of a traditional experiment system can be expanded.
Owner:WUHAN UNIV
Oil-paper insulation surface charge measuring device and method based on DC superimposed harmonics
InactiveCN108680835ASimulation is accurateSwitch shortcutTesting dielectric strengthCharge injectionTemperature control
The invention discloses an oil-paper insulation surface charge measuring device based on DC superimposed harmonics. The device is mainly composed of a charge injection device, a surface potential measuring device and a temperature control device. The charge injection device comprises a DC power source, a harmonic power source and a voltage recombination unit. The output end of the DC power sourceand the output end of the harmonic power source are connected to the input end of the voltage recombination unit. The temperature control device is mainly composed of a microprocessor constant-temperature preheating platform. An oil-paper insulation surface charge measuring method based on DC superimposed harmonics is also disclosed. The device and method are safe and reliable in experiments, stable in output voltage and flexible in regulation, can accurately simulate the actual working condition of the valve-side sleeve of a converter transformer, and provide an efficient experimental platform and method for the study of the oil charge insulation characteristics, the breakdown mechanism and the degradation mechanism.
Owner:TIANJIN UNIV
Determination method for reaction activity order of active hydrogen-containing components and curing agent in propellant
ActiveCN104181184AImprove accuracyImprove scienceAnalysis using nuclear magnetic resonanceToluene diisocyanateLow field nuclear magnetic resonance
The invention provides a determination method for the reaction activity order of active hydrogen-containing components and a curing agent in a propellant, wherein the method is applied to the field of nuclear magnetic analysis of spaceflight fuels. The method comprises the following steps: determination of a detection object; preparation of detection samples; selection of detection conditions; implementation of sample detection; and processing of detection data. According to the invention, a mixed uniform system of active hydrogen-containing components and toluene diisocyanate (TDI) in the propellant is taken as the detection object. To prepare the samples, groups are proportioned according to concentrations, grouped and then uniformly mixed; and a proper amount of the samples are selected and placed in a chromatographic bottle. A low-field nuclear magnetic resonance spectrometer is employed, and the detection conditions are selected. The changing curve of spin-spin relaxation time T2 with reaction time is detected, each vertical coordinate of the curve is normalized, and the reaction activity order of each component and TDI is acquired according to the speed of slope changes before the curve tends to be flat. The determination method provided by the invention has the advantages of simple operation, safety in experiments, reduction in cost, reliable experimental data, optimized detection conditions and simplified detection process.
Owner:HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
Volume DBD (dielectric-barrier discharge) based oxide generation and formaldehyde removal device
InactiveCN108303390AAchieve removalUniform dischargeAnalysing fluids using sonic/ultrasonic/infrasonic wavesGas treatmentControl flowReaction chamber
The invention discloses a volume DBD (dielectric-barrier discharge) based oxide generation and formaldehyde removal device. The volume DBD based oxide generation and formaldehyde removal device comprises a gas source used for producing formaldehyde and air mixed gas, a valve C connected to the gas source, a gas flowmeter connected to the gas source, a formaldehyde generator connected between the gas source and a DBD reaction chamber, a valve B used for controlling initial concentration of formaldehyde by controlling flow, a valve A connected between the valve C and the DBD reaction chamber, agas detection chamber connected to the DBD reaction chamber and a gas monitoring device connected to the gas detection chamber. With adoption of the device, a contrast experiment between formaldehyderemoval by pure ozone and formaldehyde removal by discharge can be realized, and a key substance affecting the removal effect can be found out.
Owner:HOHAI UNIV CHANGZHOU
Method for researching energetic material reaction mechanism and evaluating safety
ActiveCN110231363AFind the boundary condition for fireIntuitive and clearMaterial thermal conductivityMaterial heat developmentCombustion chamberThermal stimulation
The invention discloses a method for researching an energetic material reaction mechanism and evaluating safety. According to the method, a quick compressor and a visual combustion chamber are utilized to realize quick and uniform thermal stimulation loading of energetic materials and record of the visual process of the reaction process. A temperature rising rate of the thermal stimulation can reach 2 x 104K / s, and thermodynamic parameters are easy to determine and control. The method is suitable for different types of energetic materials, and the shapes of the energetic materials are dividedinto blocks, floccules and powder. The dosage of the energetic material is 1-100 mg, the cost is low, and the experimental safety coefficient is high. By utilizing the method, the ignition boundary condition and the reaction mechanism of the energetic material sample can be obtained by comparing different experimental results.
Owner:XI AN JIAOTONG UNIV
Preparation method of hexagonal boron nitride nanospheres with layered cavitation structure
ActiveCN111483983AHigh crystallinityLow oxygen impurity contentNitrogen compoundsBoron nitrideNitrogen gas
The invention relates to a preparation method of hexagonal boron nitride nanospheres with a layered cavitation structure. The method takes trimethyl borate as a raw material, and comprises the following two steps: step 1, carrying trimethyl borate into a reaction zone in a nitrogen bubbling manner, reacting trimethyl borate with ammonia gas at a high temperature, and preparing a solid boron nitride nanosphere precursor by a chemical vapor deposition method; and 2, respectively carrying out annealing treatment on the prepared boron nitride nanosphere precursor in different atmospheres such as hydrogen-argon mixed gas, nitrogen and hydrogen-nitrogen mixed gas at a high temperature to obtain the boron nitride nanospheres which can be controlled by subsequent treatment atmospheres and have different layered cavitation structures. The method is simple to operate, safe in experiment and capable of realizing large-batch synthesis, and controllability of the internal cavitation structure of the boron nitride nanosphere is realized.
Owner:HEBEI UNIV OF TECH
Heat flow meter dynamic characteristic calibration device and method
The invention belongs to the field of sensor calibration, and particularly relates to a heat flow meter dynamic characteristic calibration device and method. The device comprises a detonation tube; end covers are arranged at the two ends of the detonation tube; a spark plug used for ignition is arranged on the end cover on one side; a to-be-tested heat flow meter and a standard heat flow meter which are adjacently arranged are connected to the end cover on the opposite side; a long tube with a port sealed by a diaphragm is installed on the end cover farthest away from the heat flow meter and serves as a pressure relief outlet; and the detonation tube is detachably connected with an exhaust mechanism, a fuel gas supply mechanism and a nitrogen supply mechanism. The device studies and calibrates heat radiation and convective heat transfer processes at the same time, ensures that the transient heat flow sensor can obtain reliable and accurate heat flow test data, and provides a feasible dynamic calibration method for research and performance evaluation of the heat flow sensor.
Owner:NANJING UNIV OF SCI & TECH
Concrete vibration rod
PendingCN110499918AReduce entryExperimental safetyBuilding material handlingEngineeringEnergy consumption
The invention relates to the technical field of building equipment, in particular to a concrete vibration rod. The concrete vibration rod comprises a vibration rod body, the vibration rod body is provided with a first end, a middle segment and a tail end, the tail end is a hand-held end, the first end is the end extending into concrete during using, the first end is provided with a vibration head,the middle segment is a component connecting the first end with the tail end, the middle segment is a rubber hose, the first end is provided with a hollow shell, the vibration head is mounted at thefront end of the shell and extends out of the shell, the concrete vibration rod further comprises a vibration motor mounted in the shell of the first end, the vibration motor is provided with a vibration power output end, the vibration power output end of the vibration motor is directly connected with the vibration head, the vibration motor is provided with a power wire, and the power wire passesthrough the middle of the rubber hose. The concrete vibration rod has the advantage of less energy consumption.
Owner:河南科耐新能源科技有限公司
Pressure applying mechanism for plate quality detection
PendingCN111693392ARapid hardness testPrecise alignmentInvestigating material hardnessWeight adjustmentMechanical engineering
The invention discloses a pressure applying mechanism for plate quality detection in the technical field of plate detection. The mechanism comprises a gravity pressure applying mechanism, a pressure bearing seat mechanism and a take-up and pay-off mechanism, wherein the pressure bearing seat mechanism is mounted in the center of the top of a supporting seat, the gravity pressure applying mechanismis arranged right above the pressure bearing seat mechanism, and the gravity pressure applying mechanism is connected with the take-up and pay-off structure through a pull rope. The mechanism is advantaged in that plates with different sizes and thicknesses can be rapidly loaded, movement gravity pressure application is completed through the arrangement of the gravity pressure applying mechanism,the pressure bearing seat mechanism and the take-up and pay-off mechanism, multiple times of weight adjustment are conducted to calculate different stress sizes and mass states, a pressure applying block freely falls downwards to conduct smashing force application on a detected plate, the detected plate is accurately aligned with the stress center of the plate, and rapid plate hardness detectioncan be conducted.
Owner:李天昊
Skid-mounted dew point corrosion test device and use method thereof
PendingCN111879402AEasy to storeFlexible controlSubsonic/sonic/ultrasonic wave measurementThermodynamicsWater vapor
The invention discloses a skid-mounted dew point corrosion test device and a using method thereof. The device comprises a flow control unit, a mixed heating unit, a vacuumizing unit, a waste gas treatment unit and a control unit, and the flow control unit is connected with the mixed heating unit; the flow control unit is used for injecting CO2, HCL, H2S, N2 and water vapor into the mixed heating unit according to a rated proportion; the mixed heating unit is used for providing an experiment environment with a proper temperature for an experiment medium; and the vacuumizing unit is connected with the mixed heating unit and is used for vacuumizing the device pipeline and the reaction kettle cavity after the experiment is finished and discharging residual mixed gas from the system. The test device can simulate a hydrochloric acid dew point environment, can study the corrosion resistance of steel suitable for the hydrochloric acid dew point environment, and is high in measurement precision.
Owner:CHINA SPECIAL EQUIP INSPECTION & RES INST +1
Full automatic titrimeter applied to volumetric method titration and working method thereof
PendingCN110044896AEasy to operateAccurately obtain color recognition resultsMaterial analysis by observing effect on chemical indicatorColor recognitionComputer module
The invention relates to the field of experimental apparatus equipment, and discloses a full automatic titrimeter applied to volumetric method titration and a working method thereof. Via the creationof the invention, provided is a novel full automatic titrimeter that can completely simulate artificial operating steps according to a national standard method, namely that, via the specific structurearrangement of a first lifting mechanism, a titration work station, a pump mounting rack, a control panel mounting rack and a titration mechanism installation plate and auxiliary devices thereof, anupper computer can automatically perform whole-journey monitoring and titration operation control on a titration process, and achieves the purpose of automatically designing and simplifying the operation of staffs; the upper computer also can use a color recognition module arranged on the titration mechanism installation plate to replace human eyes to accurately acquire a color recognition resultof a reagent to be tested, exclude unnecessary interference and artificial deviation, and accord with national standard; and the upper computer can further accurately judge a titration end point according to a color recognition result to acquire a stable detection result.
Owner:四川晟实科技有限公司
Multifunctional adjustable monkey chair
Owner:INSITUTE OF BIOPHYSICS CHINESE ACADEMY OF SCIENCES +1
Vehicle-mounted cable terminal partial discharge detection device and method
PendingCN113156288AStrong flexibilityReduce the interference of corona discharge and external environmentTesting dielectric strengthOverload protection arrangementsIn vehicleAutomotive engineering
The invention discloses a vehicle-mounted cable terminal partial discharge detection device and method. The vehicle-mounted cable terminal partial discharge detection device comprises an experiment module, a measurement module and a background communication module which are sequentially connected through signals. The experiment module comprises two same insulating oil test boxes used as experiment containers; a ventilation cooling device, an impurity filtering device and a safety early warning device are arranged in each insulating oil test box; and a cable core at one end of a cable terminal in one insulating oil test box is connected with a high-voltage power supply through a high-voltage wiring end, and a cable in the other insulating oil test box is sequentially connected with a grounding wire, a grounding end and an external grounding electrode. The insulating oil test box is internally provided with a circulating ventilation port, a temperature and impurity monitoring device and a gas monitoring device, so that the experiment can be safely carried out, the measurement information can be directly transmitted to a computer, the measurement process is convenient and safe, and the partial discharge detection requirement of the vehicle-mounted cable terminal can be met.
Owner:SOUTHWEST JIAOTONG UNIV
Convection experimental material and experimental method
InactiveCN114049820AIncrease reflectionHigh transparencyEducational modelsExperimental methodsAlcohol
The invention discloses a convection experiment material and an experiment method. The experiment method comprises the following steps of performing an experiment by using small pieces of a 0.08 mm PET material laser silver film and ethylene glycol liquid. The convection motion experiment phenomenon is easy to observe, the experiment device, operation and observation are simple, and the experiment material and the experiment container are safe to heat; the small film pieces move in the liquid along with flowing of the liquid, the small pieces are good in light reflection, and the movement has ornamental value; in the experiment, the alcohol lamp is heated in the middle of the bottom of the container, and the small pieces rise at the center of the bottom of the container, disperse around near the liquid surface, descend around the container and gather towards the middle near the bottom of the container, so that an intuitive and close natural convective motion phenomenon is formed, and students can easily find the rule of convective motion by themselves; according to the experiment, convection which is not limited by the container in the flowing direction can be observed, continuous circulation motion of liquid under a certain condition can be observed, the three-dimensional convection phenomenon of a space can be observed, and objects in different shapes can be put into the container to explore convection in a special environment.
Owner:杨加华
Device and method for calibrating dynamic characteristics of heat flow meter
Owner:NANJING UNIV OF SCI & TECH
A coaxial counter-rotating geomagnetic energy storage and release energy delivery ground experiment system and method
ActiveCN113075592BReduce power consumptionSmall sizeCosmonautic condition simulationsThree-component magnetometersTarget reachingControl theory
Owner:INST OF MECHANICS CHINESE ACAD OF SCI +1
Solvent-assisted sagd three-dimensional physical simulation experiment method and experimental device
Owner:PETROCHINA CO LTD
A preparation method of hexagonal boron nitride nanospheres with layered cavitation structure
InactiveCN111483983BHigh crystallinityLow oxygen impurity contentNitrogen compoundsHexagonal boron nitridePhysical chemistry
The invention relates to a method for preparing hexagonal boron nitride nanospheres with a layered cavitation structure. The method uses trimethyl borate as a raw material and is prepared through the following two steps: the first step is to carry trimethyl borate into the reaction zone by nitrogen bubbling, react with ammonia gas at high temperature, and chemical vapor deposition method The solid boron nitride nanosphere precursor is prepared first; the second step is to prepare the boron nitride nanosphere precursor in different atmospheres such as hydrogen-argon mixed gas, nitrogen gas, and hydrogen-nitrogen mixed gas at high temperature. After annealing, boron nitride nanospheres with different layered cavitation structures can be obtained which can be controlled by the subsequent treatment atmosphere. The method is simple to operate, relatively safe in experiments, can be synthesized in large quantities, and realizes the controllability of the internal cavitation structure of boron nitride nanospheres.
Owner:HEBEI UNIV OF TECH
Preparation method of 3-methoxy-4-iodoaniline
InactiveCN109776331AHigh removal rateSolve problems with few typesOrganic compound preparationAmino-hyroxy compound preparationTwo stepZinc
The invention relates to a preparation method of 3-methoxy-4-iodoaniline. Cheap 2-methoxy-4-nitroaniline easy to obtain is selected as a raw material, a diazotization reaction is performed under the acid condition, activated zinc is used for being subjected to a reduction reaction with hydrochloric acid, and the target product 3-methoxy-4-iodoaniline is obtained. The technology is simple in path,raw materials are cheap and easy to obtain, operation is easy, on the condition that no phase transfer catalyst is added, due to mild reaction conditions, the yields of products obtained by the two-step reactions are both high, and waste gas, water and industrial residues generated in the experiment process are little.
Owner:NINGXIA UNIVERSITY
Method for determining the order of reactivity of active hydrogen-containing components in propellants and curing agents
ActiveCN104181184BImprove accuracyImprove scienceAnalysis using nuclear magnetic resonanceToluene diisocyanateLow field nuclear magnetic resonance
Owner:HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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