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Method and device for ultrasonic and nondestructive detection ofelasticity of viscoelastic medium
ActiveCN101699280AReduce computing timeReduce complexityAnalysing solids using sonic/ultrasonic/infrasonic wavesHealth-index calculationSonificationLow frequency vibration
The invention relates to a method and a device for the ultrasonic and nondestructive detection of the elasticity of a viscoelastic medium, which belong to the technical field of nondestructive measurements. The method comprises the following steps of: using an ultrasonic probe to produce low-frequency vibration on a medium to be detected, emitting ultrasonic waves to the medium to be detected and acquiring an ultrasonic signal returned from the medium to be detected; selecting an ultrasonic signal range for calculating the elasticity of the medium to be detected; using the selected ultrasonic signal to calculate the transmission speed of an elastic wave produced by the low-frequency vibration in the medium and further calculating the medium elasticity according to the obtained transmission speed of the elastic wave. The device comprises an ultrasonic wave energy converter contact, a vibrator fixing the ultrasonic wave energy converter contact and a control device. In the method and device, motion compensation of the ultrasonic probe is not required, so that calculation time is shortened; meanwhile, position detection is carry out without a position sensor, so that the system complexity and cost are lowered.
Owner:BEIJING SONICEXPERT MEDICAL TECH CO LTD +1
Installing method for main pipeline of coolant system of nuclear power station
ActiveCN102169736ASimple structureReduce elbowNuclear energy generationReactors manufactureNumerical controlPressurized water reactor
The invention relates to an installing method for a main pipeline of a coolant system of a nuclear power station, which is characterized in that the main pipeline of the coolant system of a reactor of the pressurized water reactor nuclear power station comprises a cool section (41) and a hot section (42), and a steam generator is directly connected with a main pump. According to the invention, the problem that the main pipeline is installed and welded by only a pressure container or steam generator in place by adopting the installing method of the main pipeline without a transition section issolved, and technical limit that the main pipeline is installed after the pressure container is in place and the steam generator or main pump is in place in the traditional main pipeline constructiontechnology is eliminated. A main pipeline groove is processed by adopting a site numerical control machining technology, the main pipeline and equipment connected with the main pipeline are subjectedto measurement, modeling and process monitoring by adopting a laser tracking measuring and 3D modeling technology, the main pipeline is regulated to meet the assembly welding requirement and is installed by using a narrow TIG (argon tungsten-arc welding) automatic welding technology, thus a feasible method is provided for shortening the construction period of the nuclear power station.
Owner:CHINA NUCLEAR IND FIFTH CONSTR CO LTD
Photocuring and thermocuring conductive adhesive and preparation method
ActiveCN102127386ALiquidConnectivityNon-macromolecular adhesive additivesPolyureas/polyurethane adhesivesEpoxyAdhesive
The invention discloses a photocuring and thermocuring conductive adhesive, which is prepared by mixing photosensitive high polymer, diluent monomer, conducting particles, photoinitiator, polymerization inhibitor, epoxy resin, epoxy active diluting agent, latent curing agent and latent promoting agent, grinding the mixture, and stirring and dispersing in a planetary manner. The curing temperature of the product is low, and deep curing can be realized; after being cured, the adhesive has high adhesiveness and high solvent resistance; and the adhering strength is high, the resistivity is low, and the requirements of microelectronic packaging technique for LED chips, liquid crystal materials, glass substrates, thin film circuits, PCB circuit boards and the like can be met.
Owner:东莞市新懿电子材料技术有限公司
Multilayered gradient diamond like nano composite coating for aluminum alloy piston and preparation method thereof
InactiveCN102092166AOvercome stressOvercome adhesionLayered productsVacuum evaporation coatingDiamond-like carbonSurface layer
The invention discloses a multilayered gradient diamond like nano composite coating for an aluminum alloy piston and a preparation method thereof. The coating consists of a piston matrix, a bottom adhesive layer, a middle transition layer and a surface layer in turn, wherein the bottom is provided with a metal Ti or Cr adhesive layer; the middle transition layer is metal nitride and a Si layer; and the surface layer is a metal-doped diamond like carbon film. The wear life of the coating is improved by more than 40 times compared with that of a single-layer diamond like coating with the same thickness directly formed on the surface of aluminum alloy, and the friction coefficient under the oil lubricating condition is stabilized to be 0.05. The piston with the diamond like coating has better comprehensive performance than a piston of which the skirt is treated by MoS2, and can meet the requirements on high speed, high efficiency and low emission of a modern engine.
Owner:LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Halogen-free intumescent flame-retardant polypropylene/ethylene vinyl acetate cable material
ActiveCN101649088AImprove insulation performanceImprove mechanical propertiesPlastic/resin/waxes insulatorsInsulated cablesExtensibilityUv absorber
The invention relates to a halogen-free intumescent flame-retardant polypropylene / ethylene vinyl acetate cable material which is characterized by comprising the following components by weight part: 20-40 parts of polypropylene, 60-80 parts of ethylene vinyl acetate, 45-65 parts of compound flame retardant, 5-15 parts of grafting agent, 1.0-2.0 parts of antioxidizer, 1.0-2.0 parts of ultraviolet absorbent and 1.0-3.0 of processing aid. With the advantages of favorable flexibility, high breakage extensibility, favorable tensile strength, excellent electrical insulating property and good flame retardant, the material favorably meets the requirements on the burning property, the mechanical property and the heat property of the cable material and is mainly used as the outer coating material ofcables.
Owner:应急管理部四川消防研究所
Horizontal pumping system and pumping control method for automobile wind tunnel
InactiveCN1808089AEffective simulationEfficiently model uniform simulationsAerodynamic testingDiffusionDifferential pressure
The invention relates to a system for pumping horizontally on wind tunnel of vehicles and a method for controlling pumping. The system comprises: wind tunnel spout, pumping spout seal, horizontal pumping slot, air flow pumping pipe, flow counter, differential pressure sensor, PLC controller and variable-frequency controller; under the wind tunnel spout being placed the pumping spout, on the front edge being connected with pumping spout seal, on the upper, lower ends of the front edge being connected with the differential pressure sensor; on one end of the flowing counter being connected with the pumping spout, the other end being connected with pumping machine which is connected with the variable-frequency controller; the variable-frequency controller, differential pressure sensor, and the flow counter are respectively connected with the PLC controller. The method comprises: making air flow for testing enter downstream diffusion stage of testing via the inventive device, in front of the testing vehicle forming wind speed profile, selecting different pumping spout seal, adjusting the opening of the pumping spout; calibrating the pressure differential vs. testing wind speed, flow vs. testing wind speed and rotary speed vs. testing wind speed three action control curve, comparing the real pumping flow with the real pressure differential of the upper, lower edges of pumping spout and the calibration curve data.
Owner:TONGJI UNIV
Automatic market shopping management system and method
InactiveCN101089886AOvercome stressOvercome the long-term training of service personnel in shopping mallsCommerceSystems managementBarcode
A shopping-management system of automation market is prepared as setting a terminal with a bar code scanning unit and platform balance on shopping cart to generate a bar code data and weight data of commodity by scanning and weighing selected commodity, utilizing system management host with a commodity databank and a shopping record storage to generate a shopping record being stored in said shopping record storage when commodity selected by purchaser is put in said shopping cart.
Owner:ZEBEX IND
New energy power generation grid-connection comprehensive peak regulation capacity assessment model based on demand side responses
ActiveCN103578044AOvercome stabilityOvercome stressData processing applicationsElectricityNew energy
The invention discloses a new energy power generation grid-connection comprehensive peak regulation capacity assessment model based on demand side responses. The building processes of the model include the steps of (1) building a comprehensive peak regulation capacity assessment technology platform, wherein the comprehensive peak regulation capacity assessment technology platform is used for achieving acquisition, collection and calculation of peak regulation related data of the whole network, (2) building a peak regulation capacity index system, (3) building indexes related to specific peak regulation capacity and carrying out index statistics or calculation, and (4) on the basis of the peak regulation capacity index system, substituting the specific peak regulation capacity related indexes obtained in the step (3) to form the new energy power generation grid-connection comprehensive peak regulation capacity assessment model based on the demand side responses. The new energy power generation grid-connection comprehensive peak regulation capacity assessment model based on the demand side responses can overcome the defects that in the prior art, wind power output is poor in stability, high in peak regulation pressure and the like, and has the advantages of being good in stability of wind power output and low in peak regulation pressure.
Owner:STATE GRID CORP OF CHINA +3
Prepreg Compression Molding Method
The invention relates to a compression moulding method for a prepreg in the technical field of materials. The compression moulding method for the prepreg comprises the following steps of: laying the prepreg; premolding the prepreg; and solidifying and molding, namely adhering a silica gel sheet in an upper mould, a lower mould or both the upper mould and the lower mould, laying the prepreg on the silica gel sheet, closing the mould, heating, and solidifying and moulding. In the method, the silica gel sheet is used as an assistant measure for hot compression moulding of the prepreg; and due to the thermal expansion performance of the silica gel sheet, in heating moulding, the silica gel sheet is heated and expanded and generates internal pressure, so that the prepreg sheet is subjected to uniform pressure in all directions; therefore, the technical problems that the positive pressure on the side wall of a manufactured product is insufficient and the manufactured product is affected by internal pull are solved, the bonding strength between layers of the manufactured product is greatly improved, and the manufactured product is difficult to deform.
Owner:SHANGHAI CEDAR COMPOSITES TECH CO LTD +2
Sweeper capable of automatically adjusting height of sweeping brush
ActiveCN102409631AAuto height adjustmentOvercome stressRoad cleaningProgramme control in sequence/logic controllersPower flowReciprocating motion
The invention discloses a sweeper capable of automatically adjusting height of a sweeping brush. The sweeper comprises a frame, a battery pack, a sweeping brush motor with a sweeping brush, an air extractor, a garbage collection box, a filtering dust collection box provided with a dust collection filter element, a reciprocating driving device, a central control unit and a current sensor, wherein the sweeping brush is connected with the frame through a lifting device; a fixing part of the reciprocating driving device is connected with the frame; a reciprocating part of the reciprocating driving device is connected with the lifting device for fixing the sweeping brush motor; a signal induction device of the current sensor is connected with a power supply circuit of the sweeping brush motor; a signal output end of the current sensor is connected with the central control unit; the central control unit is connected with a reciprocating driving control module of the reciprocating driving device; the central control unit analyzes current input from the signal output end of the current sensor; and the reciprocating driving control module drives the reciprocating part to make corresponding pull-and-push action according to the analysis result so as to adjust the lifting device to move up and down.
Owner:FOSHAN GEMEI CLEANING EQUIP
Energy balance-based control method of main steam pressure of supercritical CFB (circulating fluidized bed) boiler
ActiveCN104676574AOvercome stressOvercoming demandsFluidized bed combustionBoiler controlSteam pressureEnergy balanced
An energy balance-based control method of main steam pressure of a supercritical CFB (circulating fluidized bed) boiler includes the steps: S1, after a main steam pressure deviation signal P<T>-P<TS> of a unit is regulated by a PID (proportion integration differentiation) regulator, a signal A is output; S2: a steam turbine demanded heat signal is acquired through a steam turbine energy demand model; S3, a heat signal provided by boiler energy is acquired through an instant carbon mechanism model; S4, subtracting the steam turbine demanded heat signal E<R> by the heat signal E provided by boiler energy is performed, regulating is performed with the PID regulator, and a signal C is output; S5, after subjected to time differentiation, the steam turbine demanded heat signal E<R> is multiplied by a proportional gain k so as to obtain an output signal B, and a sum of the signals B, A and C is output to a boiler master controller; S6, coal feed is regulated according to master control output of a boiler so as to control the main steam pressure. The method has the advantages that regulating quality of the unit can be improved, stability of a main steam pressure control system of the supercritical CFB boiler is improved and ability to respond to load response of the unit is satisfied.
Owner:TSINGHUA UNIV
Self circulation type cold storage air conditioner system
InactiveCN101082434AReduce assembly capacitySave electricity costsLighting and heating apparatusAir conditioning systemsCold airMagnetic valve
This invention discloses a sort of air condition system which can store up cold air and circulate by itself it consists of the indoor set A and the indoor set B, in the indoor A the bottom outlet of the inner tubule of the bushing evaporator which is used to store up cold air connects with the inlet of the heat transfer coil pipe. The inlet of the heat transfer coil pipe connects with the top outlet of the inner tubule of the bushing evaporator which is used to store up cold air. It has the medium for storing up cold air in the trough for storing up cold air; the heat transfer coil pipe for storing up cold air which is full of heat transfer medium in its bosom immerges in the trough for storing up cold air, the indoor set connects with the inlet of the trough for storing up cold air respectively by the electromagnetic clique and the evaporator for the air condition. The evaporator for the air condition and the trough for storing up cold air all connect with the inlet of the circle pump by the electromagnetic clique. The inlet of the circle pump connects with the he indoor set A. Its density for storing up cold air is high than the system for storing up cold air used the water in storing up cold air and offering cold air. It can leave out the circle system which has the carrying cold dose during the low temperature in storing up cold air.
Owner:NANJING UNIV
Preparation method and application of modified polypropylene non-woven fabric
InactiveCN102965929AOvercome mechanical propertiesOvercoming pollutionFibre treatmentWater/sewage treatment by sorptionDesorptionSolvent
The invention discloses a modified polypropylene non-woven fabric, its preparation method and application. The preparation method comprises: impregnating a polypropylene non-woven fabric in a grafting solution containing a graft monomer, a crosslinking agent, a non-ionic surfactant and a photosensitizer, and initiating graft polymerization under ultraviolet irradiation, thus obtaining the modified polypropylene non-woven fabric, which can be widely used in adsorption separation treatments of dye wastewater, heavy metal ion wastewater, inorganic anion acid radical-containing chemical wastewater and the like as a filtering material. The modified polypropylene non-woven fabric provided by the invention has the characteristics of high mechanical strength, large water flux, and great saturated adsorption capacity. Meanwhile, after being subjected to a regeneration treatment in a cationic surfactant-containing ethanol solvent desorption solution, the adsorbed filtering material can be recycled.
Owner:SUZHOU UNIV
Portion waveshape steel web plate pre-stress steel-concrete continuous combined case beam
InactiveCN101255677AGood three-dimensional flexibilityImprove tensile propertiesBridge materialsBridge engineeringSheet steel
The present invention relates to a partial corrugated steel web prestressed steel-concrete continuous composite box-girder. The concrete roof plate is permanently connected with the steel box-girder through a connecting plate and a shear connector. In the steel box girder the steel diaphragm plates are installed respectively corresponding to each fulcrum. The whole steel box-girder is composed of a structural negative monument area segment and the structural positive moment area segment arranged at two ends. The concrete roof plate of the structural negative moment area segment is stretched with a longitudinal prestressed rib. A longitudinal stiffening rib is arranged in the steel baseboard. The web plates at two sides of the steel box-girder in the structural negative moment area are corrugated steel webs. The web plates of the steel box-girder in the structural positive moment area steel box-girder are plane steel web plate. The invention can overcome the problems of low efficiency of longitudinal pre-stress of negative moment area in the continuous composite box-girder and corrugated steel web PC composite box-girder, easily destabilization of the plane steel web plate or more arrangement of the longitudinal prestressed rib inside or outside the box-girder and complex construction and the like. The invention has broad applying prospect in the bridge engineering and long-span structure.
Owner:HUNAN UNIV
Preparation method of composite film layers and method of using same to remove tetracycline residue in pharmaceutical wastewater
ActiveCN107803119AMethod innovationEasy to operateSemi-permeable membranesWater contaminantsComposite filmPolyetherimide
The invention relates to a preparation method of composite film layers and a method of using the same to remove tetracycline residue in pharmaceutical wastewater. The method is characterized by comprising: making GO (graphene) into GO solution, dissolving zinc nitrate and 2-methylimidazole respectively in methanol, mixing, adding the GO solution quickly into the mixed solution, stirring well, centrifuging, washing, drying to obtain ZIF-8 (zeolitic imidazolate framework) / GO composite powder, ultrasonically treating the composite powder to obtain a suspension, and binding the dispersed ZIF-8 / GOsuspension and polyetherimide-modified microporous filter film by means of vacuum suction filtering to form ZIF-8 / GO composite film layers different in thickness; using a vacuum suction filter to passpharmaceutical wastewater through the above composite film layers, and performing suction filtering repeatedly; tetracycline in the tetracycline is removed to 88.9-95.5%; the preparation method of the composite film layers and the method of using the same have the advantages that operations are simple, the cost of raw materials is low, recycling is facilitated, and the materials are reusable.
Owner:NINGXIA UNIVERSITY
Manufacture method of multilayer gradient nano-composite diamond film of surface of die steel
ActiveCN103160781AImprove bindingOvercome stressVacuum evaporation coatingSputtering coatingGas phaseBinding force
The invention discloses a manufacture method of a multilayer gradient nano-composite diamond film of the surface of die steel. The manufacture method includes that a plunger undergoing conventional pretreatment is arranged in a vacuum system of a magnetron sputtering composite vapor deposition system, and multiple layers of gradient films are sequentially deposited. Each layer of the multiple gradient transition layers undergoes high-temperature annealing treatment and argon ion surface etching treatment so as to improve binding force of the films and a base. The defects of high internal stress and poor adhesive force and the like of a conventional diamond film on the surface of the mold steel are overcome.
Owner:LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Method for coating bearing bush steel backing with Babbitt metal coating
ActiveCN106435563AImprove product qualityImprove the level ofHeat inorganic powder coatingSocial benefitsThermal spraying
The invention relates to the technical field of preparation and repair of sliding bearing Babbitt metal anti-friction layers. The novel cold spraying technology is introduced into manufacturing and repair remanufacturing of a Babbitt metal sliding bearing bush lining anti-friction layer, atomization powder feeding is adopted to obtain coating microstructures with uniform components and fine dispersely-distributed and uniformly-dense crystal grains and second phases through cold spraying, and the good interface bonding characteristic is obtained through tinning layer setting and sprayed thermal treatment; the defects of poor structure uniformity, thermal impact, stress, cracking and oxidizing burning losses existing in the technologies such as a traditional casting method, an overlaying method and a thermal spraying method are overcome, the bearing bush component preparation quality and level are improved, the bush burning frequency is decreased, stopping supercritical vibration is lowered, the stability, accuracy and reliability of a bearing transmission unit are improved, and the service life of the bearing transmission unit is prolonged; the method is rapid, efficient and environmentally friendly, is used for bearing bush manufacturing and repair remanufacturing, and has good economic benefits and social benefits.
Owner:UNIV OF SCI & TECH BEIJING
Heart chamber simulator driving mechanism
ActiveCN104346987ARegulate beat rateAdjustable beat rateEducational modelsHeart chamberHeart beating process
The invention discloses a heart chamber simulator driving mechanism, which comprises a motor, a speed reducer, a crank shaft connecting rod mechanism, a linear guide rail and a piston air cylinder, wherein an output end of the motor is connected with an input shaft of the speed reducer, an output shaft of the speed reducer is connected with one end of the linear guide rail through the crank shaft connecting rod mechanism, the other end of the linear guide rail is connected with the piston air cylinder through a shaft coupler, an air hole is formed in the side wall of the piston air cylinder, and the air hole is connected with a heart chamber simulator through a pipeline. The driving mechanism belongs to a driving mechanism capable of providing a pulsation type power source for the heart chamber simulator according to the set frequency and discharge capacity. The driving mechanism has the advantages that the pulsation feature of the beating of the heart chamber simulator can be realized, meanwhile, the beating frequency and the discharge capacity can be respectively regulated, and the human body heart beating process is more really simulated.
Owner:SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
Fuel cladding and fuel component
ActiveCN107799185AOvercome stressOvercoming interfacial diffusionOptical rangefindersFuel elementsInter layerNuclear reactor
The invention discloses a fuel cladding and a fuel component; the fuel cladding includes a zirconium alloy base, an intermediate layer arranged on the zirconium alloy base and having nonstoichiometryand gradient characteristics, and an ambient shielding layer arranged on the intermediate layer; the intermediate layer and the ambient shielding layer form a gradient composite coating of nonstoichiometry on the zirconium alloy base. The fuel cladding and the fuel component have the advantages that the problem that a traditional zirconium alloy cladding with single coating experiences interfacialstress and interfacial diffusion and zero tolerance to high temperature vapor oxidation is solved; through synergic design and the gradient composite coating of nonstoichiometry in the fuel cladding,the fuel cladding is applicable to accident fault-tolerant nuclear fuel claddings, and anti-accident ability of a nuclear reactor to maintain nuclear fuel component structure and functional integrality under severe conditions and its safety threshold are greatly increased.
Owner:CHINA NUCLEAR POWER TECH RES INST CO LTD +2
Device and method for continuously rectifying 3-chloropropyl triethoxysilane
InactiveCN102580338AShorten the timeFast distillationGroup 4/14 element organic compoundsFractional distillationRefluxTriethoxysilane
The invention provides a method for continuously rectifying 3-chloropropyl triethoxysilane, belonging to the field of chemical engineering separation. The device is characterized by comprising an ethanol rectifying separating device and a 3-chloropropyl triethoxysilane rectifying separating device which are structured the same and connected in series by a conveying pipeline and a material transforming pump, wherein each of the two rectifying separating devices which are structured the same comprises a rectifying tower, a condenser and a finished product storage tank which are connected with the top of the rectifying tower by a reflux pipeline, a condenser and a crude product storage tank which are connected with the bottom of the rectifying tower by the conveying pipeline. The crude product storage tank is connected with a next group of a rectifying separating device by the material transforming pump. In the first tower, ethanol is removed at normal pressure to reach a purity of more than 99.8%; in the second tower, 3-chloropropyl triethoxysilane is removed by rectifying at a negative pressure of -0.0098Mpa to reach a purity of more than 99.5%.
Owner:淄博市临淄齐泉工贸有限公司
Drill stem thickening process and thickening module
InactiveCN101767173AOvercoming uneven shapeOvercoming processabilityForging/hammering/pressing machinesStress concentrationPunching
The invention relates to a drill stem thickening process and a thickening module. The thickening module comprises a thickening module 1 and a punching module 2. a third time thickening module is a final forming module, namely an inner thickening copying module, which comprises a clamping area 11, a transition belt 12, a thickening area 13, a transformation transition belt 14 and a starting area 15 which are orderly connected with the thickening area 13. The length of the transition belt of the thickening module is prolonged and the transition is performed in the manner of S-shaped smooth transition. The invention overcomes the shortcomings of the prior art that the shape of the transition belt in the drill stem is uneven, lathe work is required, the stress concentration is easily occurred, the service life of the drill stem is short, and the like. Compared with the prior art, the thickening transition belt in the drill stem can naturally smooth transit so the stress concentration in the deformation area and the probability of generating vortex caused by size change during usage are greatly decreased, the stress at the thickened tube joint part is reduced, the inner transition belt of the final products is unnecessary to form, the use life of the drill stem is prolonged and the drill stem quality is ensured.
Owner:HENGYANG VALIN STEEL TUBE +1
Diameter-changeable pulsating heat pipe
The invention discloses a diameter-changeable pulsating heat pipe. The diameter-changeable pulsating heat pipe comprises an evaporation section, a heat insulating section and a condensation section. A pulsating heat pipe vacuumizing opening and a pulsating heat pipe working medium filling opening are formed in the left end and the right end of the condensation section correspondingly. Upper bends and lower bends of the pulsating heat pipe are connected with adjacent main channels with different hydraulic diameters and the main channels with the different hydraulic diameters are distributed and connected in the shape of an S on a whole silicon plate. The diameter-changeable pulsating heat pipe has the advantages of being simple in structure, good in heat transferring performance and easy to miniaturize. Meanwhile, compared with traditional pulsating heat pipes, the outstanding effects that the large pressure difference can be formed more easily compared with the traditional pulsating heat pipes during starting by the aid of the hydraulic diameter differences of the bends of the pulsating heat pipe, frictional resistance and shearing stress are overcome and accordingly the starting time is shortened, the pulsating heat pipe can take more heat away from the evaporation section due to the hydraulic diameter differences of the bends of the pulsating heat pipe compared with the traditional heat pipes, and meanwhile the heat exchange frequency is increased are achieved.
Owner:NANCHANG UNIV
Miniaturized heat-resistant and high-dynamic pressure sensor
ActiveCN108871652ASolve the problem of high temperature failureImprove high temperature stabilityFluid pressure measurement by electric/magnetic elementsAdhesiveEngineering
A miniaturized heat-resistant and high-dynamic pressure sensor comprises a sensor probe which is internally provided with a sensor chip, the sensor chip is fixed through a heat-resistant ceramic adhesive, the sensor probe is connected with a metal tungsten filament which passes through a seal plate, and the seal plate is connected with the sensor probe; the front end face of the sensor probe is provided with a pressure guidance hole which communicates with a pressure channel and a square sensor chip in the sensor probe, the rear end of the sensor chip installation groove is provided with a sensor vacuum chamber, and the side wall of the sensor probe is internally provided with a the metal tungsten filament taken as a lead terminal of the pressure sensor; the sensor chip is square-shaped, four sensitive resistors are arranged at the front surface of the sensor chip in the same direction, the back surface of the sensor chip is a square cavity corresponding to a square sensitive film, andthe pressure is applied to the square sensitive film through the pressure guidance hole. The miniaturized heat-resistant and high-dynamic pressure sensor is small in volume, resistant to heat and fast in response, and can be used for measurement of the total pressure and the static pressure.
Owner:XI AN JIAOTONG UNIV
Auxiliary control equipment for automatic drive of motor vehicles, control circuit and gating method
ActiveCN105196911ARealize automatic collectionRealize the display effectVehicle headlampsOptical signalMotor vehicle partAutomatic control
Owner:陈觉明
A multi-layer elastic composite film having functions of bending shape maintenance and impact resistance and a preparing method thereof
ActiveCN104608445AOvercoming bending elasticityOvercome elasticitySynthetic resin layered productsLaminationComposite filmAdhesive
The invention discloses a multi-layer elastic composite film having functions of bending shape maintenance and impact resistance and a preparing method thereof. The composite film has a function of cambered surface covering shape maintenance, a function of elastic vibration absorption and a function of resisting violent impact. The composite film comprises a film protecting layer, a using layer and a stripping layer from top to bottom. The film protecting layer is disposed on the using layer. The stripping layer is disposed under the using layer. The using layer comprises a UV coating, an uppermost transparent film, an upper adhesive coating, a first soft transparent film, a first adhesive coating, a second soft transparent film, a second adhesive coating, and a lowest soft transparent film from top to bottom. The composite film can be firmly adhered to a screen, is not liable to rebound, and has good cambered surface fitting and shape maintenance capability, thus achieving cambered surface edge covering.
Owner:NALI OPTICAL MATERIAL DONGGUAN
Four-dimensional dynamic ground stress simulation method
ActiveCN107066718AOvercome stressOvercoming the problem of changing reservoir parametersDesign optimisation/simulationSpecial data processing applicationsWell engineeringStress field
The invention discloses a four-dimensional dynamic ground stress simulation method which comprises the following steps: S1, establishing a three-dimensional geologic model; S2, establishing a three-dimensional oil reservoir model and predicting a three-dimensional pore pressure field and a temperature field at different stages by utilizing production / injection dynamic parameters; S3, establishing a three-dimensional ground stress model; S4, forming an initial ground stress field; S5, establishing a four-dimensional dynamic ground stress model according to an initial three-dimensional ground stress filed model by taking the dynamic three-dimensional pore pressure field and the temperature field; S6, making a seepage-stress coupled solution and analyzing and calculating dynamic ground stress and pore elasticity parameters used for guiding wells engineering practice. The method has the beneficial effects that the changing situations of the dynamic ground stress and the pore elasticity parameters in an oil and gas exploitation process can be accurately reflected, so as to provide guidance for refracturing of old wells and drilling and completion operation of new wells.
Owner:SOUTHWEST PETROLEUM UNIV
Large-span arch bridge arch ring line shape control method and optimization calculation model
ActiveCN111709175AOvercome large lateral misalignmentOvercome uniformity issuesGeometric CADDesign optimisation/simulationLinear controlElement model
The invention relates to the field of bridge construction, in particular to a large-span arch bridge arch ring line shape control method and an optimization calculation model. Aiming at an arch bridgewhich is large in arch rib span, large in hoisting weight, large in number of hoisting sections and difficult in linear control, a traditional method is adopted for generating large transverse deviation in the construction process; based on this, a space finite element model is established through finite element software; based on an influence matrix principle, a displacement influence matrix ofthe arch ring is calculated under the action of dead weight, each unit of cable buckling force and each unit of side cable wind cable; then, according to the coupling effect of the buckle cable and the side cable wind cable on displacement and in combination with the optimization calculation theory, the deviation between the buckle cable and the target line shape after closure and cable looseningserves as a constraint function, the deviation between the buckle cable and the target line shape in the construction process serves as a target function, the buckle cable force and the side cable wind cable initial tension are solved, and then the arch ring line shape and cable force in construction are calculated; results show that the vertical deviation and the transverse deviation of the archring of the arch bridge with the span of 360 m can be controlled within 10 mm and 6 mm respectively after the arch ring is closed and the cable is loosened, and high-precision assembly of the arch ring can be achieved.
Owner:GUANGXI ROAD & BRIDGE ENG GRP CO LTD
Silica sol-combined mullite perfusion material adapted to rapid repair of industrial furnace
The invention discloses a silica sol-combined mullite perfusion material adapted to rapid repair of an industrial furnace, which belongs to the refractory material technical field. The perfusion material comprises the following raw materials by weight: 50-60% of mullite granules, 10-20 % of mullite powder, 5-10% of white alundum powder, 4-15% of alpha-active alumina micro powder, 0.6-1.0% of magnesium oxide powder, 0.5-0.7% of dextrin, 10-16% of silica sol and 1-2% of dispersing alumina. The silica sol-combined mullite perfusion material is characterized in that the silica sol is individually packaged; other components are weighted according to ratio and mixed through mechanical stirring to uniform aggregates in a dry state; on construction site, the individually packaged silica sol and uniform aggregates in the dry state are weighted according to ratio, and uniformly mixed and stirred and pumped for construction. The perfusion material has the advantages of excellent physical and chemical property and good application property, pumping for construction can be used, manpower and material resources can be saved, rapid repair requirement for various industrial furnaces can be satisfied, and the perfusion material is the excellent repair refractory material with strong adaptability.
Owner:中冶武汉冶金建筑研究院有限公司
Fuse salt jet impinging heat dump
InactiveCN102367994AOvercome ablationOvercome stressSolar heat devicesSolar thermal energy generationHex dumpSunlight
The invention relates to a fuse salt jet impinging heat dump which comprises an absorber (1), a high-temperature steel plate (2), inflow ports (3 and 3'), an outlet (4) and a nozzle (16), wherein the fuse salt jet impinging heat dump (8) is a of cylinder shape, and the front of the absorber (1) faces converged sunlight; the high-temperature steel plate (2) is positioned at the interior of the fuse salt jet impinging heat dump (8) and fixed on the shell of the fuse salt jet impinging heat dump (8) in welding manner, and the high-temperature steel plate (2) is embedded with the nozzle (16); an outlet of the nozzle (16) faces the back of the absorber (1), the inlet is connected with the inflow ports (3 and 3') arranged on the bottom of the fuse salt jet impinging heat dump (8); fuse salt is delivered to the inflow ports (3 and 3') through pump exhausting to flow to the nozzle (16) through a pipeline, thereby spraying to absorber (1), and the absorber (1) is subjected to jet impinging cooling so as to take away the heat; and the heated fuse salt flows out from the outlet (4) of bottom of a gap positioned between the absorber (1) and high-temperature steel plate (2).
Owner:INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
Temperature control device of flue gas desulfurizing and acid-making hot blast stove and control method
ActiveCN103307627AControl response speedOvercome temperatureFuel supply regulationTemperature controlHot air oven
A temperature control device of a flue gas desulfurizing and acid-making hot blast stove comprises a programmable controller, wherein a coke oven gas pressure regulating valve, a coke oven gas pressure sensor, a coke oven gas flow sensor and a coke oven gas flow regulating valve are mounted on a coke oven gas inlet pipeline; a combustion air flow sensor and a combustion air flow regulating valve are mounted on a combustion air inlet pipeline; a temperature sensor and a pressure sensor are mounted on the flue gas desulfurizing and acid-making hot blast stove; and the programmable controller exchanges signals with the coke oven gas pressure regulating valve, the coke oven gas pressure sensor, the coke oven gas flow sensor and the coke oven gas flow regulating valve on the coke oven gas inlet pipeline, exchanges signals with the combustion air flow sensor and the combustion air flow regulating valve on the combustion air inlet pipeline, and exchanges signals with the hot blast stove temperature sensor and the hot blast stove pressure sensor on the flue gas desulfurizing and acid-making hot blast stove. The temperature control device of the flue gas desulfurizing and acid-making hot blast stove can quickly and accurately control the temperature and the pressure of the hot blast stove, so that the hot blast stove can meet flue gas desulfurizing and acid-making requirements of a sintering machine.
Owner:SHANXI TAIGANG STAINLESS STEEL CO LTD
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