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System and method for leachate treatment in sanitary landfill
InactiveCN101891336AStable and efficient operationEasy to handleMultistage water/sewage treatmentAnaerobic reactionWater treatment
The invention belongs to the field of recycling economy and water treatment and discloses a system and a method for leachate treatment in a sanitary landfill. The system is formed by sequentially connecting a regulating tank, an upflow anaerobic reaction tank, an anaerobic and aerobic biochemical reaction tank, a secondary sedimentation tank, a coagulation sedimentation tank, an immersion-type ultra-filtration system, a nano-filtration system and an advanced oxidation system. The system is capable of carrying out the overall treatment on waste leachate, achieving the advanced treatment of the waste leachate in the sanitary landfill in a way that the physical treatment, chemical treatment and biological treatment are integrated based on the principle that the contaminants having different particle sizes and properties in the waste leachate are classified and achieving the classification of nearly 90 organic contaminants in the waste leachate, thus the treated effluent can fully meet the requirement for the effluent concentration limit of water pollution according to 'the standard for pollution control on the landfill site of municipal solid waste' (GB16889-2008), the system can operate stably for a long time, and the treatment cost is lower than that according to the secondary disc tube reverse osmosis (DT-RO) process.
Owner:BEIJING YIPU INT WATER AFFAIRS
Mounting method for underbeam segment of large-stride steel box girder stayed-cable bridge
ActiveCN101476294AEasy to installThe installation method is safe and reliableBridge erection/assemblyCable stayedBridge deck
The invention relates to a large span steel box girder cable-stayed bridge tower lower beam segment mounting method, belonging to the bridge construction steel box girder construction technology field. The construction method comprises the steps: (1) setting up a masts type crane lifting tower area steel box girder by means of the upper crossbeam of the cable tower and the construction wind; (2) mounting the bridge deck crane in on the tower area steel box girder and lifting the first standard beam segment immediately adjacent to the tower area steel box girder; (3) mounting the bridge deck crane symmetrically on the mounted first standard beam segment, and starting the standard beam segment symmetrical hanging on both the river side and the bank side. The method in the invention achieves the advantages of simple, practical, safe, reliable, economic, convenient less limited by the construction condition, solves the problems in present large span steel box girder cable-stayed bridge construction process.
Owner:SICHUAN ROAD & BRIDGE GRP
Method for mapping dynamically inside and outside network of server based on DDNS and NAT
InactiveCN101043447AFacilitate communicationImprove resource utilizationNetwork connectionsDomain nameIp address
The dynamic mapping method for internal and external server networks based on DDNS and NAT comprises: setting a special-developed internal-external gateway server or router, storing DDNS service program and the correlated NAT conversion service program; registering internal server DN and IP address message on the gateway server by NNDS client; to the DNS request for internal network server, using the NAT program to automatic allocate a public IP address; starting the NAT conversion to return the public IP address to complete the dynamic mapping.
Owner:CHONGQING UNIV +1
AC power flow constraint-based uncertainty unit commitment model and solving method
ActiveCN105790265AQuick solveReduce the risk of voltage overshootData processing applicationsSpecial data processing applicationsElectricityDatum reference
The invention relates to an AC power flow constraint-based uncertainty unit commitment model and a solving method. With the minimum fuel cost sum for a thermal power unit in 24 hours as an optimization target, a chance-constrained method is adopted to describe uncertainty for wind power output, AC power flow model-based network security constraints are built, and thus, the AC power flow security constraint-based uncertainty unit commitment model is provided. In view of the problem that the model is hard to solve, the invention provides a random constraint ordinal optimization method for successfully realizing quick model solution. In comparison with the traditional DC power flow constraint-based uncertainty unit commitment model, the provided model of the invention can effectively reduce the risk of threshold crossing of power grid voltage after large-scale wind power access, effectiveness of current power generation planning decisions is enhanced, the built model can finely calculate system network losses, and data reference is provided for a dispatching person. In addition, the solved algorithm is greatly enhanced compared with the traditional algorithm.
Owner:CHINA THREE GORGES UNIV
Intelligent card charging system and method thereof
InactiveCN101655949ASolve the inconvenience of rechargingTime consuming to solvePayment architectureCoded identity card or credit card actuationNetwork terminationComputer terminal
The invention discloses an intelligent card charging system and a method thereof. The system comprises: a network terminal for accessing the network to be switched into a charge interactive system, wherein the network terminal comprises a control unit for executing the communication between the charge interactive system and a preposed interface device; the preposed interface device for communicating with the intelligent card and providing an interface for the intelligent card to be switched into the network terminal, transmitting a received earmark order to the intelligent card to be charged,and returning a successful order after the intelligent card is successfully charged; and the charge interactive system for electronically paying, transmitting the earmark order to the control unit, and synchronously updating the remaining balance of an E-wallet of the intelligent card in an intelligent card business system. By using the invention, users can charge by themselves with a computer terminal at home, thereby saving time and being convenient.
Owner:BEIJING WATCH DATA SYST
Distributed file system
ActiveCN104111804AImprove reading and writing efficiencyEffective preservationInput/output to record carriersTransmissionCache serverDistributed File System
The invention relates to a distributed file system which comprises a big file storage server, a big file metadata management server and a cache server, wherein the big file storage server is used for storing split big file data blocks, and big files are files of which the size is larger than the preset size; the big file metadata management server is used for storing metadata of the big files, storing mapping information of the big file data blocks on the big file storage server, managing the namespace of the big files and processing the requesting information of a user; the cache server is used for storing small files, metadata of the small files and caching part of frequently visited big files, and the small files are the files of which the size is smaller than or equal to the preset size. According to the distributed file system, the big files and the small files are stored separately, the big files are stored on the big file storage server in a block mode, the small files are stored on the cache server and the reading and writing efficiency of the big files and the small files is improved effectively.
Owner:JINAN UNIVERSITY
Device for drilling and coring lunar soil in moon outside hole
The invention relates to a device for drilling and coring lunar soil in the moon outside a hole, and belongs to the field of equipments for sampling loose lunar soil in the moon. A screw rod drill bit of the device is a solid drill bit, a drill bit blade is arranged on the circumferential surface of the lower part of the screw rod drill bit, a bearing is mounted at the upper part of the screw rod drill bit in a matching manner, and a connection sleeve is fixedly connected with the bearing; a collector is a hollow sleeve, an annular empty inclined plane is arranged inside the collector, a lower port of the collector is connected with a coring tube orifice in a matching manner, an upper port of the collector is connected with the connection sleeve in a matching manner to be sleeved on the periphery of the screw rod drill bit, and a sand guide mouth is formed at the bottom part of the collector and is connected with a core filling hose; therefore, the loose sand rises to a certain height along with the drilling of the drill bit to enter the collector, and the sand can flow into the core holding hose outside the hole through the sand guide mouth of the collector under the action of gravity force and centrifugal force. The device creatively solves the difficult problem that the loose lunar soil in the moon is drilled under the unattended operation conditions, efficiently and conveniently finishes the core package and transfer of moon lunar soil drilling and coring, and particularly provides feasible excellent equipment for the lunar exploration geology research.
Owner:WUHAN DIDA CHANGJIANG BIT
Process for producing marsh gas and bioorganic fertilizer by utilizing tobacco waste
InactiveCN102887754ASolve the problems that plague tobacco farmersSolve puzzlesBio-organic fraction processingWaste based fuelSocial benefitsMicrobial agent
The invention discloses a process for producing marsh gas and bioorganic fertilizer by utilizing tobacco waste. The process comprises the following steps of: a, primary crushing; b, auxiliary material blending; c, anaerobic fermentation; d, solid-solution separation; e, secondary feed proportioning; f, stacking and fermentation; g, magnetic concentration; h, drying; i, pulverization; and j, packaging. According to the process, through carrying out the anaerobic fermentation and aerobic fermentation after a microbial agent is added into the tobacco waste, the marsh gas which is higher in value and the high-quality bioorganic fertilizer are produced; the recycle of resources is realized; the waste is changed into the valuable; the difficult problem of the tobacco waste, which puzzles a tobacco grower for a long term, is really solved; and the process is better in economic benefit and social benefit.
Owner:云南海利实业有限责任公司
Foam concrete material and preparation method thereof
The invention relates to a foam concrete material and a preparation method thereof. The foam concrete material comprises solid components and foams, wherein the solid components in parts by weight comprise 40-60 parts of slurry, 25-50 parts of cement, 5-8 parts of slaked lime, 2-3 parts of gypsum, 0.5-1 part of fiber and 1-3 parts of early strength agent, the volume of the foams is 50-80 times the total volume of the solid components, and the foams are prepared by foaming a foamer water solution with a foamer and water in a mass ratio of 1 to 30. Compared with the prior art, the invention has the advantages that the foam concrete is prepared by utilizing waste slurry, thereby being favorable for environment protection and having excellent insulation performance; and a light heat insulation material with an excellent insulation effect can be prepared and directly applied to non-bearing structures needing the insulation effect, such as roofs, ground heating projects and cushion layers. The foam concrete provided by the invention can be directly poured on site and has no special maintenance conditions and construction process requirements.
Owner:SHANGHAI ZHONGJIN CONSTR GRP
Planting hole and method for using planting hole to green rock slope and breakage mountain body
InactiveCN101258814ASimple processReduce construction costsClimate change adaptationAfforestationPlant growthPlant soil
Owner:刘宝兴
Solidification/stabilization treatment method for papermaking sludge
InactiveCN101885575AHarm reductionReduce cement consumptionSludge treatment by de-watering/drying/thickeningCinderWater content
The invention discloses a solidification / stabilization treatment method for papermaking sludge. The method comprises the following steps of: adding a solidifying agent into the papermaking sludge with water content of 70 to 80 percent according to a weight ratio of the sludge to the solidifying agent of 100:14-24, stirring the mixture to react for 10 to 15 minutes and uniformly mixing the mixture to form solidified block precursors; and laying solidified block precursors which are uniformly stirred in a sludge landfill site according to a thickness of 5 to 100cm, covering a water-proof membrane on the solidified blocks and curing the solidified blocks for 2 to 10 days by using a dry curing method to form sludge solidified blocks, wherein the compressive strength of the sludge solidified block is 160 to 320kPa, the COD concentration in solidified block leaching solution is 110 to 200mg / L, and the water content of the solidified block is 30 to 40 percent; and the solidifying agent comprises the following components in percentage by weight: 40 to 50 percent of aluminate cement, 15 to 25 percent of fly ash and 30 to 40 percent of cinder; toxic heavy metal ions are wrapped after the sludge solidification, so that the pollution of the sludge is reduced; the solidified sludge does not have foul smell of the original sludge and reduces the harm to an operator during the operation; and the method has the advantages of readily available raw material, low cost, stable effect and simple operation procedure.
Owner:GUANGDONG UNIV OF TECH
Dual-system material-smoothening automatic-balancing regulating control device and method
ActiveCN103420130AGuaranteed normal operationSimple structureControl devices for conveyorsBulk cargoTested time
The invention relates to the field of bulk cargo conveying of belt conveyor, in particular to a conveying material-smoothening control device and method of a belt conveyor. A dual-system material-smoothening automatic-balancing regulating control device comprises a moving trolley, a trolley track, a track fixing frame, a trolley traveling motor, a moving chute, a dual-system left chute, a dual-system right chute and an electronic scale. A dual-system material-smoothening automatic-balancing regulating control method comprises the steps that a unit displacement distance, a test time interval and a deviation threshold value of the moving chute are set, the electronic scale measures the flow of material on a dual-system downstream belt conveyer every other test time interval, and if deviation of the left material flow and the right material flow of the dual-system downstream belt conveyer is greater than the deviation threshold value, the moving chute moves towards the side with the lower material flow. The dual-system material-smoothening automatic-balancing regulating control device and method ensure that the locating point of the moving chute is in a dual-system material-smoothening balancing state all the time, avoid material leakage and accumulation accidents caused by flow deviation of the moving chute, guarantee that a conveying belt operates normally, and facilitate safety production and productivity improvement.
Owner:BAOSHAN IRON & STEEL CO LTD
Steel slag composite powder and preparation method thereof
InactiveCN102180613ASolve many problems such as serious pollutionImprove hydraulic hardnessSolid waste managementAluminium sulfateSlag
The invention discloses steel slag composite powder and a preparation method thereof. The steel slag composite powder comprises the following raw materials by weight: 30 to 45kg of heat-stewed steel slag micro powder, 5 to 10kg of refining slag micro powder, 30 to 45kg of mineral slag micro powder, 3 to 3.5kg of polycarboxylic acid, 3 to 3.5kg of triethanolamine, 5 to 6kg of calcium sulfate, 4 to 5kg of polyaluminum sulfate and 2 to 3kg of dolomite powder. The preparation method comprises the following steps of: (1) crushing and pulverizing converter steel slag to obtain the heat-stewed steel slag micro powder for later use; (2) crushing refining slag to obtain the refining slag micro powder for later use; (3) putting the raw materials in a weight ratio into a ball mill and performing ball milling to obtain a mixture for later use; (4) pulverizing blast furnace slag to obtain the mineral slag micro powder for later use; and (5) mixing the mineral slag micro powder and the mixture in a weight ratio to obtain the steel slag composite powder. The steel slag composite powder is prepared from steel slag which is not required to be stored and various raw materials, and can be used in the raw materials of products such as cement, concrete and the like so as to fulfill the aims of reducing the manufacturing cost of the cement, the concrete and the like, improving product quality and expanding the use range of the steel slag.
Owner:山东济钢泰航合金有限公司
Examination question duplicate checking and judging method and device
ActiveCN104657923ASolve efficiency problemsResolve accuracyData processing applicationsTeaching apparatusLearning machineQuestion analysis
The invention relates to an examination question duplicate checking and judging method and device. The method comprises the following steps: acquiring the information of examination questions; matching the acquired information of the examination questions with the examination questions in a question bank; if the matching degree of the examination questions is lower than minimum repetition rate of the examination questions, submitting the examination questions to on-line manual answering process for treatment to acquire to-be-pushed examination question analysis; if the matching degree of the examination questions is greater than or equal to minimum repetition rate of the examination questions, confirming whether to submit the examination questions to manual duplicate judging process for treatment or not; if the examination questions are submitted to the manual duplicate judging process, pushing the corresponding examination question analysis in the question bank when the duplicate judging result is repetitive; submitting the examination questions to the on-line manual answering process for treatment to acquire to-be-pushed examination question analysis when the duplicate judging result is not repetitive; otherwise, pushing the corresponding examination question analysis in the question bank. Through the combination of two manners of an image recognition technology and manual duplicate judging, the problem that teachers answer repetitive examination questions and repetitive examination questions are accumulated in the question bank due to immaturity of current image recognition technologies is solved; burden of manual answering questions is reduced; the method and device can be applied to educational electronic products of learning machines, and the like.
Owner:GUANGDONG XIAOTIANCAI TECH CO LTD
High-purity sodium rabeprazole compound
InactiveCN101704811AOvercome purityOvercome the disadvantages of difficult purificationOrganic chemistryOrganic solventRabeprazole
The invention relates to a high-purity sodium rabeprazole compound, belonging to the technical field of medicine. The method includes the following steps: dissolving crude sodium rabeprazole synthesized by the reaction of rabeprazole and sodium hydroxide in water, adjusting pH value to be faintly acid to neutral by using solid acid salt, and collecting precipitated solid; after dissolving the solid with organic solvent, conducting elution and purification by using eluting agent through macroporous adsorption resin, and collecting eluent; and adjusting the pH value of the eluent to be alkaline, and collecting the precipitated solid to obtain the pure sodium rabeprazole.
Owner:HAINAN MEILAN SMITH KLINE PHARMA
Method for culturing cyprids of balanus reticulates on large scale
The invention discloses a method for culturing cyprids of balanus reticulates on a large scale, which comprises the following steps: after ovum of the balanus reticulates is bred into naupliar larva, putting the naupliar larva into a culture medium with bait for constant temperature culture in dark environment; performing intermittent lighting on the naupliar larva in the constant temperature culture process; and performing cold storage on the appeared cyprids. The method can overcome the defects of high death rate, small and unstable yield, quick settlement and metamorphosis processes, incapacity of storage and accumulation and the like in the breeding process of the cyprids, greatly improve the yield of the cyprids, effectively prolong the time of a drifting stage of the cyprids, promote the settlement synchrony of the cyprids, and provide required experimental materials for screening marine fouling organism antifouling compositions and studying environmental toxicology, along with wide application prospect.
Owner:SOUTH CHINA SEA INST OF OCEANOLOGY - CHINESE ACAD OF SCI
Two-step optimization design method for automotive body section shape
InactiveCN103455692ASolve problems in the field of structural designSolve puzzlesSpecial data processing applicationsShape optimizationSize parameter
The invention discloses a two-step optimization design method for an automotive body section shape. A box-type section is adopted as an intermediate variable to establish two-step collaborative optimization design. The first step of optimization design includes: taking weight of an automotive body as an objective function and high stiffness performance as a constraint condition to build an optimization model in regard to dimension parameters of length, width and thickness of the box-type section; adopting serial linear programming based on component sensitivity information to solve the optimization model so as to obtain the optimal dimension of the box-type section, and further obtaining optimal geometric features of the section. The second step of optimization design includes: taking a minimum sectional area as an objective as well as bending inertia moment, torsional moment of inertia and manufacturing process obtained through first-step optimization as constraint conditions, performing section shape optimization study on sheet thickness and node coordinates of a beam section; adopting a genetic algorithm to solve a polynomial of discrete-continuous variables. By the optimization design method, the complex section shape of the automotive body is determined rationally, and the problem troubling the field of automotive body structure design is solved.
Owner:JILIN UNIV
Thermal shock gasifying electrospray ionization source and mass spectrometry (MS) system
ActiveCN105470095AImprove application efficiencySolve puzzlesIon sources/gunsMass spectrometersPhysicsIonization
The invention discloses a thermal shock gasifying electrospray ionization source and a mass spectrometry (MS) system, belonging to the technical field of ambient MS ionization. The MS ionization source disclosed by the invention comprises an electrospray generator, a heating device and a sampling device, wherein the heating device comprises a gasifying chamber and a heater providing heat for the gasifying chamber; a sample nozzle of a sample tube of the sampling device is configured in a way of facing the bottom of the gasifying chamber; the outlet end of a spraying capillary tube of the electrospray generator is opposite to the inlet of a mass spectrometer and is spaced from the inlet by a certain distance; the gasifying chamber and the sample nozzle are placed under the space between the outlet end of the spraying capillary tube and the inlet of the mass spectrometer. The ionization source provided by the invention gasifies a sample in a thermal shock manner and improves the heating efficiency of the sample through shortening heating time; since the sample is heated for a short time, heat energy is not converted into the molecular internal energy of the sample and only can be provided for the sample to overcome the intermolecular force, and the molecules of the sample cannot be decomposed due to heating; thus, the ionization source provided by the invention can be used for detecting heat-unstable and nonvolatile compounds and biological samples and solves the difficulty existing in the traditional thermal desorption technology.
Owner:HEILONGJIANG UNIV
Multifunctional automatic stamping machine and using method thereof
The invention relates to a multifunctional automatic stamping machine. The multifunctional automatic stamping machine comprises a base, a rack, an eccentric wheel, a motor, vertical sliding parts, a sliding transverse rod, an inkpad box and a stamping part, wherein the rack is arranged on the base through a side plate, a paper inlet gap is arranged between the bottom side of the side plate and the base, the motor is installed on the rack, an output shaft of the motor is horizontally arranged, the eccentric wheel is fixedly installed on the output shaft of the motor, the vertical sliding parts are arranged on the left and right side surfaces of the rack, the sliding transverse rod is fixedly arranged on the vertical sliding parts, a horizontal runway groove is arranged in the horizontal direction of the middle of the sliding transverse rod, an eccentric driving rod is fixedly arranged at the external end surface of the eccentric wheel, the eccentric driving rod is arranged in the horizontal runway groove, the inkpad box is inserted into the lower end surface of an inkpad baffle, an inkpad oil film surface faces downwards, and the stamping part is arranged below the inkpad box and is connected with the vertical sliding parts. The multifunctional automatic stamping machine can automatically stamp bills, the stamping pressure is uniform and the stamps are clear, uniform and consistent.
Owner:张松鹤
Power consumption calculating method of are machine multiterminal type air conditioner
InactiveCN1590883ADispel doubtsSolve puzzlesSpace heating and ventilation safety systemsLighting and heating apparatusEngineeringElectric consumption
A method for calculating the electric consumption of each indoor unit in an air conditioner with multiple indoor units features that the overheat degree or overcold degree, the pressure of refrigerant and the capacity of each indoor unit are used as the basic parameters of calculation.
Owner:LG ELECTRONICS (TIANJIN) APPLIANCES CO LTD
Method for preparing graphene device on flexible substrate
ActiveCN103943513AMake up for the defect of not being able to integrate high-temperature processesAchieve process integrationTransistorSemiconductor/solid-state device manufacturingLow temperature depositionElectron-beam lithography
The invention discloses a method for preparing a graphene device on a flexible substrate. The method for preparing the graphene device on the flexible substrate at least includes: 1) providing the flexible substrate, attaching the flexible substrate to a hard substrate, and forming graphene conducting channels in the flexible substrate; 2) carrying out electron beam lithography patterning to form a source electrode pattern and a drain electrode pattern, and depositing metal and peeling to form a metal source electrode at one end of each graphene conducting channel and form a metal drain electrode at the other end; 3) using a low-temperature deposition process to deposit at the surface of the structure obtained through the step 2) to form a gate medium layer; 4) etching the gate medium layer to expose the metal source electrode and metal drain electrode at two ends of the graphene conducting channel; 5) carrying out electron beam lithography patterning to form a gate electrode pattern, and depositing metal and peeling to form a gate electrode on the gate medium layer between graphene conducting channels; 6) forming a contact electrode; 7) separating the flexible substrate from the hard substrate.
Owner:SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
3d printing process and concrete combined building structure and construction method
The invention discloses a 3d (three-dimensional) printing process and concrete combined building structure and a construction method. The construction method comprises the following steps: 1) constructing a digital model of a shell and an internal structure of a building component; 2) performing 3d printing operation on the digital model; 3) pouring concrete to form an integrated structural component with the model which is printed in the step 2), and performing cooperative work; 4) after the building component in the step 3) is formed integrally, deciding whether to remove the shell of the 3d printing model according to engineering requirement, wherein the bare material of the concrete can be used as a model element. According to the 3d printing process and concrete combined building structure and the construction method, the problem that reinforcing steel bars are difficult to manufacture in special-shaped curved surface reinforced concrete construction can be effectively solved; force is transferred explicitly; construction components are reduced; construction processes are simplified; construction cost is reduced.
Owner:SOUTH CHINA UNIV OF TECH
Composite high-viscosity modified asphalt and preparation method thereof
InactiveCN103819918AGood high and low temperature performanceImprove thermal storage stabilityBuilding insulationsEnvironmental effectEconomic benefits
The invention relates to composite high-viscosity modified asphalt and a preparation method thereof. The raw material comprises the following components by weight percent: 84-88% of heavy duty bitumen and 12-16% of modified compounds. The method comprises the following steps: mixing SBS, desulfurized colloidal particles and a compatilizer containing an epoxy group to prepare a modified compound; preparing modified particles after mechanically pelletizing; adding the modified particles to asphalt at 170-190 DEG C; melting and refining compound particles after shearing at a high speed for 30-60 minutes on a high-speed mixing emulsifier; transferring the sheared asphalt to a high-speed disperser, and agitating to obtain the composite high-viscosity modified asphalt. The composite high-viscosity modified asphalt prepared by using the method has the characteristics of stable heat storage, and excellent high and low temperature properties, has good economic benefits and environmental effects because of use of waste rubber, and is free of sulphur as a stabilizer, the construction viscosity can be reduced, the construction environment can be improved, and the problem that incompatible asphalt is difficult to stabilize is solved.
Owner:SHANGHAI JIAO TONG UNIV
High-silicon high-aluminium ferrite stainless steel and its application in preparation of heat-resisting steel pipe
InactiveCN1542156AHigh temperature oxidation resistanceResistant to chloride ionsTemperature control modeSS - Stainless steel
The present invention relates to ferrite stainless steel and its application in rolling heat resistant steel pipe. The ferrite stainless steel contains: C not more than 0.06 wt%, Cu not more than 0.30 wt%, Si 0.5-2.0 wt%, S not more than 0.030 wt%, Mn not more than 0.6 wt%, P not more than 0.030 wt%, Cr 16.0-25.0 wt%, Ti not more than 0.3wt%, Al 0.5-2.0 wt%, Ni not more than 0.60 wt%, N not more than 0.030 wt%, except Fe. During making heat resistant steel pipe with the ferrite stainless steel, temperature control mode in 100-1050 deg.c is adopted.
Owner:王光煌
Bi-dimensional pipe interface angle cutting control device
InactiveCN101246362ASolve puzzlesCompact structureProgramme controlComputer controlMicrocontrollerAxial displacement
The invention relates to two-dimensional manifold assembly interface angle incising control device. The main technological features lie in that a angle sensor and a control box is mounted on a treading electric machine, a control circuit mounted in the control box is controlled by monolithic computer, the monolithic computer computes the axial translation of stepping motor through manifold assembly diameter parameter, angle parameter and correlation parameter input by control box panel, input information transferred by angle sensor to drive the stepping motor to designated axial translation, a tread wheel and guiding wheel is mounted on lower part of tread motor, a rack bar is fixed on the tread trolley on which a tread motor is fixed, a rack bar tread mechanism is mounted on the rack bar, a stepping motor and cutting gun are mounted on the rack tread mechanism. The device incorporating the invention with simple and reasonable structure is suitable for manifold assembly with large or small ports and is a upgrade product of existing manifold assembly interface angle cut-off machine.
Owner:TIANJIN SINO GERMAN VOCATIONAL TECHN COLLEGE
Method of increasing recovery through ultra-high water cut stage fault block oil reservoir zoning regulation and control
ActiveCN106351624ASolve puzzlesImprove the development effectFluid removalEffective potentialWater flooding
The invention provides a method of increasing recovery through ultra-high water cut stage fault block oil reservoir zoning regulation and control. The method of increasing recovery through ultra-high water cut stage fault block oil reservoir zoning regulation and control includes the steps that 1, zone structural geology features and well pattern evolution features are analyzed and researched; 2, reasonable zoning research is carried out through complex remaining oil features and influence factors, typical fault block oil reservoir plane water flooding effect difference and influence factors are analyzed, and an ultra-high water cut stage fault block oil reservoir zoning scheme is formulated comprehensively; 3, a numerical simulation means or oil reservoir engineering method is adopted, development contradictions of all zones are determined, zoning regulation and control technological policy optimization is carried out, and zoning injection and production regulation and control scheme is executed to optimize the design. The method of increasing recovery through ultra-high water cut stage fault block oil reservoir zoning regulation and control is clear in technical idea and simple in application, and a feasible method is provided for effective potential digging of ultra-high water cut stage complex fault block remaining oil in the later stage of production.
Owner:CHINA PETROLEUM & CHEM CORP +1
Fault range finding method of power distribution network based on equivalent positive and negative sequence impedance principle
ActiveCN109283429ASolve puzzlesAccurate fault locationFault location by conductor typesSystems intergating technologiesChannel state informationElectrical resistance and conductance
The invention discloses a fault range finding method of a power distribution network based on an equivalent positive and negative sequence impedance principle. According to the method, a PMU is used to obtain line state information in real time, and a fault line is determined by calculating and comparing the head-end line voltages in the same branch point; normal line information is used to calculate the head-end voltage and current of the fault line; and on the basis that electrical quantity of the two ends of the fault line is known, accurate fault locating is realized on the basis of the equivalent positive and negative sequence impedance principle. The difficulty that too many branch lines are included in fault location in the power distribution network via the limited PMU, and accurate fault locating is realized; fault range finding is realized by measurement in the two ends, it is not required to determine the fault type, the method is avoided from influence of transitional resistors or opposite-end feed-in current, and it is not required to consider the change of fault boundary condition or system operation manner, and compared with the single-end measurement method, the range finding precision is higher, fault range finding can be realized rapidly and accurately, the operational reliability, safety and flexibility of the system are improved greatly, and the applicationprospects are better.
Owner:ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +2
Method for determining equivalent engineering constants in planes of compound materials in thickness direction
A method for determining equivalent engineering constants in planes of compound materials in the thickness direction includes a first step of determining a three-dimensional stress-strain relation of compound material single layers under a structural overall coordinate system, a second step of determining a two-dimensional stress-strain relation of the compound material single layers in the planes based on the three-dimensional stress-strain relation of the compound material single layers under the structural overall coordinate system according to a plane strain hypothesis in the planes of the compound material single layers in the thickness direction, and a third step of determining the equivalent engineering constants in the planes of the compound material single layers in the thickness direction. The method determines the equivalent engineering constants in the planes of the compound materials in the thickness direction, and the equivalent engineering constants can be directly input into commercial finite element software to endow material properties on each compound material single layer, and the method can be used for building a two-dimensional finite element model of each compound material single layer to solve mechanical response of a compound material structure. The method is favorable for improving analysis precision of the compound material structure and remarkably reducing calculation scales and cost, and has important engineering application value.
Owner:BEIHANG UNIV
Heat exchanger pipe-pipe plate assembling structure and welding method thereof
InactiveCN108680051AReduce difficultySolve the problem of easy deformation and difficult assemblyArc welding apparatusHeat exchanger casingsEngineeringAssembly structure
The invention relates to a heat exchanger pipe-pipe plate assembling structure and a welding method thereof. In current product pipe-pipe plate assembling and welding, positioning of a heat exchangingpipe is difficult, deformation is likely to happen in the overturning and transferring process, the assembling difficulty is large, warping deformation is generated in the welding process, positioning of a pipe-pipe plate welding machine head is difficult, all-position welding is used, and the welding operation is difficult. The heat exchanger pipe-pipe plate assembling structure comprises a heatexchanging pipe (2), and the heat exchanging pipe is of a groove-shaped structure composed of one set of single pipes; the two ends of the heat exchanging pipe are each provided with a pipe plate (1); the end face stretch-out length of the heat exchanging pipe and the pipe plates is 1.5 mm, and pipe plate bevels are 2x45 degrees; a center shaft of a welding gun (4) and the vertical center line ofthe heat exchanging pipe form a 15-degree included angle; the pipe plates are made from a 022Cr19Ni10 material, and the thickness of the pipe plates is 5-32.1 mm; the single pipes of the heat exchanging pipe are made from a 022Cr19Ni10 material, and the diameter is Phi 38x2 mm; and the heat exchanging pipe is fixed to the horizontal position of a fixture through a set of groove-shaped plates on the fixture (3). The heat exchanger pipe-pipe plate assembling structure is used for assembling the heat exchanger pipe with the pipe plates.
Owner:HARBIN BOILER
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