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744results about How to "Easy to operate on site" patented technology

Multi-point forming device for plate

The invention relates to a multi-point forming device for a plate. The device comprises a die carrier, a plurality of upper pressure head pressurizing units and a plurality of lower pressure head supporting units, wherein the plurality of upper pressure head pressurizing units are arranged on an upper flat plate of the die carrier; the plurality of lower pressure head supporting units are arranged on a lower flat plate of the die carrier; each upper pressure head pressurizing unit consists of an upper pressure head, a spring and a travel adjusting component; an upper pressure head is arrangedin a positioning hole on the upper flat plate of the die carrier, and can move up and down along the axis of the hole; the spring is arranged between the upper pressure head and the upper flat plate of the die carrier; each lower pressure head supporting unit consists of a lower pressure head, a plunger and a hydraulic cylinder; the hydraulic cylinder is fixed on the lower flat plate of the die carrier; and the plunger is connected with the lower pressure head. A forming curved surface can be formed optionally and is easy and convenient to adjust. Any element is not required to be adjusted inreal time in a forming process, and stable and uniform normal pressure always acts on the plate, so that effective normal constraint is formed and the plate can be effectively prevented from wrinkling. The device has a reasonable structure, is easy to operate, works reliably, and is an ideal multi-point forming device for the plate.
Owner:HARBIN INST OF TECH AT WEIHAI

Water-soluble corrosion inhibitor, preparation and application thereof

The invention discloses a water soluble corrosion inhibitor, the preparation method and the application of the corrosion inhibitor, solving the defect of narrow application range of the corrosion inhibitor pH in the prior art; the water soluble corrosion inhibitor is composed of 20-70 weight proportion of imidazolines derivates, 1-10 weight proportion of pyridine derivates, 1-20 weight proportion of corrosion inhibition auxiliary agent and 10-50 weight proportion of solvent, based on the total weight of the corrosion inhibitor as the reference. The water soluble corrosion inhibitor in the invention has corrosion inhibition effect on the metal material in the medium with wide PH variation range (pH equals to 1-10) and good metal surface film formation property.
Owner:LUOYANG PETROCHEMICAL ENG CORP SINOPEC

Detection method of thick beam structure damage based on guide wave

The invention provides a detection method of thick beam structure damage based on guide wave, comprising the following steps: arrangement of transducer, arrangement of excitation signal, generation, spread and collection of the excitation signal, and signal processing and analysis, and damage identification. Owing to the reasonable arrangement of an exciter and a sensor and appropriate arrangement of the excitation signal, damage waveform signal of a thick beam object in a project can be collected. Besides, information indicating position and degree of damage can be obtained by waveform extraction and analysis, thus realizing sound monitoring and the damage detection of thick beam.
Owner:SHANGHAI JIAO TONG UNIV

High corrosion resistant antiwear iron base heat spray coating layer material and its preparation method

The invention relates to coating materials of iron base alloy with high corrosion and wear resistance, and preparation method. 1) Hot spraying materials are wires processed by using metallic tapes covering metal-powder. 2) Hot spraying materials have high ability of forming amorphous, whose components are as follows: 13-20% Cr, 0.2-5% Mn, 0.2-5% B, 0.05-1% C, 0.1-0.5% Si, 0.02-0.5% of S and P. At least one of the following alloy elements is selected: (1) One or more of Al, Ga and Sn is contained. (2) One or more of Mo, W and V is contained. Total of the two group of alloy element is more than 0.5%. The rest is Fe. 3) Coats getting directly by hot spraying are composite materials of amorphous and nanocrystalline, which have both wear resistance and corrosion resistance. Based on simple preparation and low cost, coats are applicable for field construction.
Owner:ADVANCED TECHNOLOGY & MATERIALS CO LTD

Transformation calibration method and system for mechanical arm coordinate system

The invention provides a transformation calibration method and system for a mechanical arm coordinate system. The transformation calibration method comprises the steps that S1, based on a tracking measurement device arranged in the working range of a target mechanical arm, the coordinate rotation transformation relation of a tail end tool coordinate system relative to a measurement reference coordinate system is obtained through a tail end coordinate system translational movement method; S2, the coordinate homogeneous transformation relation of the tail end tool coordinate system relative to amechanical arm base coordinate system is obtained through a single-axial rotation method based on the tail end tool coordinate system and kinematic transformation relative to the mechanical arm basecoordinate system; and S3, based on coordinates of selected calibration sampling points, the coordinate homogeneous transformation relation of the mechanical arm base coordinate system and the measurement reference coordinate system is obtained through a multipoint gravity center solution method, a gravity center processing method and a Roderick matrix transformation solution method. The calibration procedure is simple, the calibration algorithm is free of the iterative process, the consumed time of coordinate calibration can be effectively reduced, and the calibration precision of the coordinate systems is improved.
Owner:INST OF MICROELECTRONICS CHINESE ACAD OF SCI

Intelligent multiparameter-monitoring buoy device

The invention provides an intelligent multiparameter-monitoring buoy device. The intelligent multiparameter-monitoring buoy device comprises buoy equipment, water quality monitoring equipment, communication equipment and power supplying equipment, wherein the buoy equipment is used for enabling the whole buoy device to float on the surface of water, the water quality monitoring equipment is used for monitoring water quality, the communication equipment is used for realizing data transmission between the water quality monitoring equipment and a shore-based main station side and positioning the water quality monitoring equipment and the shore-based main station side, and the power supplying equipment is used for supplying power. According to the intelligent multiparameter-monitoring buoy device, by adopting an embedded-type low-power-consumption design, the integral volume of an instrument compartment and a buoy is reduced; by adopting an intelligent operation mode, the timed, continuous or specified monitoring on water quality is realized; by adopting intelligent electrical quantity management, the effective operation of a solar power supplying system is realized; by adopting a multi-mode mutually-standby communication mode, the real-time property of data is improved, and the risk of out-of-touch is lowered; a sensor with a self-cleaning device is adopted, and intelligent analytical judgment is carried out by integrating a variety of information, so that the quantity of field maintenance is minimized; and the buoy is subjected to integrated protection in multiple manners such as electricity, sound, light and the like, so that the influence on the safety of the buoy caused by marine environments, fishery activities and the like is lowered and prevented.
Owner:YANTAI DONGRUN INSTR

Cut-off wall slurry material and wall building technique

The present invention discloses one kind of water tight wall grout material and the wall building process therewith. The wall grout material includes wall protecting slurry comprising bentonite or clay, sodium carbonate, selective flocculant, water loss lowering assistant and water; and curing original mortar comprising Portland cement, sand, fly ash, water glass, water reducing agent, cross-linking agent and water. The water tight wall building process includes the following steps: pouring wall protecting slurry into dug water tight wall slot, adding curing original mortar gradually into the slurry for mixing with wall protecting slurry during digging operation, and adding more water glass in the last stage for curing to form water tight wall. The water tight wall has excellent water tight performance, controllable solidification time, low cost and no pollution.
Owner:CHANGZHOU INST OF TECH

Electric power apparatus integrated automated detection system

The present invention provides an integration automatization examining system of electric power equipment which relates to fields of integration automatization examining of electric power system, which comprises of host computer PC, lower computer DSP, power amplifier. A PCI bridge with dual-port RAM is connected between host computer PC and lower computer DSP, a sampling circuit connected with analog-to-digital converter in series is placed between power amplifier and lower computer DSP. Parameters and orders are input to host computer PC, selected program downloaded by PC is transferred to DSP, data current is passed through memorizer of DSP, and examining task is carried by DSP. The present invention changes former mode of customization examining device and realizes a multi-use machine, makes the upgrade operation of program convenient, can transfer large current data, and has high precision. The present invention can finish all kinds of protection functional testing of remote control, remote examining, remote signaling of on-line examining and inspection, can communicate with device to be measured, and display testing result on testing report automatically. The report employs Word document, so it's convenient operation by users.
Owner:扬州奥瑞科技有限公司

Concrete releasing agent for aluminum alloy template of building

The invention provides a concrete releasing agent for an aluminum alloy template of a building. The releasing agent comprises the following components in parts by weight: 8-15 parts of grease, 1-3 parts of fatty acid monoglyceride or fatty acid diglyceride, 2-5 parts of fatty acid, 1-3 parts of resin, 0.05-0.5 parts of basic metal compound, 3-5 parts of inorganic filler and 1-5 parts of solvent. The releasing agent coats the aluminum alloy template of the building and is used in the concrete pouring technology, the concrete releasing quality is good without obvious blister, and the releasing agent residue surface matter is easily removed and the releasing agent is suitable for use for single or multiple times, and the service life of the template is prolonged.
Owner:SHANGHAI JIAO TONG UNIV

Method for performing quantitative production forecast on reservoirs by weighting coefficients of effective thicknesses of reservoirs

The invention discloses a method for performing quantitative production forecast on reservoirs by weighting coefficients of effective thicknesses of reservoirs. The method comprises the following steps of establishing a Raymond & Binder triangular fracture model under the conditions nonhomogeneity and multi-layer concurrent fracturing; establishing a relation between production and reservoir physical property parameters, oil reservoir physical parameters, reservoir engineering parameters, reservoir fracturing parameters, well completion and test parameters and perforation parameters by the model; determining a relation between the effective thicknesses h and oil-phase effective permeability Ko; establishing an oil-phase relative permeability kro model; determining an oil-phase effective permeability model, and determining a residual oil saturation and irreducible water saturation model; establishing comprehensive evaluation indexes ZZ of the reservoirs by parameters: porosity phi, absolute permeability K and oil saturation So; determining the weighting coefficients of the effective thicknesses of the reservoirs of different types; establishing correction coefficients beta of the production; according to comprehensive production indexes ZZ, the weighting coefficients alpha1, alpha2 and alpha3 of the effective thicknesses of the reservoirs and the correction coefficients of the production under different development modes, computing single well production. The problems that engineering application is inconvenient and the efficiency is low are solved by the method.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1

Red-green dry-pasting glue and preparation technique thereof

A red and green dry adhesive consists of a component A and B. The component A comprises epoxy resin, coupling agent, reactive diluents, inorganic filling, and red acid organic ointment. The component B comprises organic modified amine curing agent, coupling agent, inorganic filling, accelerant, thickener, reactive diluents and green organic ointment. The component A is mixed with the component B to become white. The invention overcomes the disadvantages of the present dry adhesive (used for direct adhesion) such as low intensity, weak weatherproof performance, and inconvenience for construction, etc. The red and green dry adhesive of the invention which is special for direct adhesion has the advantages of high strength, good weatherproof performance and convenient construction. The invention discloses a preparation method of the red and green dry adhesive at the same time.
Owner:JIANGSU DALISHI YUNSHI NURSING MATERIAL CO LTD

Large-span tunnel arch secondary lining steel bar binding construction method based on skeleton beams

The invention discloses a large-span tunnel arch secondary lining steel bar binding construction method based on skeleton beams. A bound tunnel arch secondary lining steel bar comprises an outer layer reinforcement mat, an inner layer reinforcement mat and a vertical connecting bar for connecting the outer layer reinforcement mat with the inner layer reinforcement mat. The construction method comprises the following steps of: arranging skeleton beam: arranging a plurality of skeleton beams below a tunnel arch primary supporting structure from front to back, wherein the skeleton beams are arch-shaped beams of which the radiuses are the same as that of the outer layer reinforcement mat, and the plurality of skeleton beams construct a load bearing structure of a tunnel arch secondary lining steel bar; and II, binding the tunnel arch secondary lining steel bar: binding the outer layer reinforcement mat on the upper parts of the plurality of skeleton beams, and suspending the inner layer reinforcement mat on the outer layer reinforcement mat through the vertical connecting bar. The method has the advantages of simple construction process, convenience in constructing, good use effect, high practical value, no damage to a paved waterproof structure and easiness and convenience in controlling the deflection of a large-span station arch secondary lining steel bar.
Owner:CHINA RAILWAY FIRST GRP CO LTD +1

Leak detection tool applied to high pressure gas leak detection method

A leak detection tool applied to a high pressure gas leak detection method, comprising a packer and a detection gas-collecting casing; the packer is arranged in an oil string to be detected or a casing string or an auxiliary tube, is located at two sides of a connecting thread buckle part to be detected and likely to leak, and is used for establishing inner confined space which is capable of filling with tracer gas and is otherwise called plenum space; the detection gas-collecting casing is arranged outside the oil string or the casing string or the auxiliary tube, is located in the connecting thread buckle part likely to leak, and covers the connecting thread buckle part to establish outer confined space which is capable of detecting leak and is otherwise called detection space; the plenum space is connected with a high pressure vent pipe on a pressurized container to facilitate high pressure tracer gas to enter. The detection space is connected with a detector of the tracer gas by being provided with a pipeline. The leak detection tool provided by the invention has simple structure, high detection reliability and convenient and practical field operation.
Owner:ANTON OILFIELD SERVICES (GRP) LTD

Fracturing fluid stock solution, full-filling preposition-free sand adding fracturing method and fracturing fluid cross-linking solution thereof

ActiveCN101747886AReduce the amount of fluid entering the wellImprove efficiencyFluid removalDrilling compositionHigh fractureFracturing fluid
The invention relates to the technical field of petroleum extraction, in particular to a fracturing fluid stock solution, a full-filling preposition-free sand adding fracturing method and a fracturing fluid cross-linking solution thereof. The fracturing fluid stock solution is prepared from guargum, clay stabilizer, potassium chloride, cleanup additive, bactericide, pH regulator, fluid loss additive, low-temperature activator and water. The invention reduces the well entrance solution amount of the fracturing fluid, reduces the secondary pollution and damage to sensitive ground layers by the fracturing fluid, shortens the occupation and production period, reduces the operation cost and has high fracturing fluid efficiency. The supporting crack is fully filled, wide seams are formed in zones near a well, the diversion capability of cracks near the well is effectively improved, and the after pressure yield of the single well is improved. The process is simple and can be completed without the assistance by special equipment, so the in-site operation is convenient. The invention can be widely used for the oil layer transformation of low-seepage and water-sensitive storage layer oil gas zone blocks.
Owner:新疆石油管理局采油工艺研究院

Plugging agent suitable for large leakage, its preparation method and leaking stopping technology

The invention relates to a plugging agent suitable for large leakage, its preparation method and a leaking stopping technology. The invention is suitable for repeatable large leakage, belonging to the field of petroleum drilling. The plugging agent comprises the following ingredients by the following weight ratio: clear water: HSD (HHH): HD-1: HD-2: LD-102: DF-A: barite = 100: 12-15: 4-5: 7-8: 4-5: 30. According to the invention, by reinforcing the interaction among ingredients, maximizing the structural strength of the plugging agent entering a leak layer, maintaining the trend that the leak layer is gradually enhanced with time after injecting the plugging agent in the leak layer, and further increasing the pressure bearing capacity of the leak layer, the leakage problem of a repeatable return-lost large-scale absorption well can be solved, the problem of leaking stopping existing in the prior art can be overcome, and the one-time leak stopping success rate is increased.
Owner:CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD

Large-scale transformer differential protective system test method

ActiveCN101349724AReduce consumptionThree-phase short-circuit current is smallElectrical testingPhase differenceEngineering
The invention relates to a large transformer, in particular to a test method for large transformers. A large transformer differential protection system test method comprises a different protection relay of a transformer, a phase meter and an ammeter and comprises the steps of: 1, selecting the ranges of the phase meter according to the test current for the check of a phase angle; switching the display picture of the differential synthetic protection relay to a differential current display unit; 2, connecting a power supply, utilizing the ammeter and the differential synthetic protection relay to check the current passing the transformer; 3, utilizing the phase meter at the current input of the differential protection relay to check and record the phase difference of the cophase currents at two sides; 4, simulating the fault state of the transformer, measuring the phase angle and the detection differential current on the relay, confirming the reliable operation of the differential protection relay under the default state; 4, ending the test, turning off the power supply and recovering former wires.
Owner:CHINA MCC20 GRP CORP

Preset nut type steel-reinforced concrete compound pier template fixing device and construction method thereof

ActiveCN101538939ASolve fixed puzzlesEnsure construction safetyForms/shuttering/falseworksCompound pierReinforced concrete
The invention discloses a preset nut type steel-reinforced concrete compound pier template fixing device and a construction method thereof. The fixing device mainly comprises a template, a nut, a screw rod, a PVC protecting pipe, an inner keel and an outer keel. The nut is welded on a steel column, the template surrounds the periphery of the steel column, the outer keel is arranged around the outer side of the template, the inner keel is arranged between the template and the outer keel, one end of the screw rod is connected with the nut by a thread, the PVC protecting pipe is sleeved on the screw rod, and the other end of the screw rod is fixed on the outer keel by a 3-shaped buckle. The invention has simple structure, low cost, and simple and convenient construction, solves the difficulty of fixing the steel-reinforced concrete compound pier template, is convenient for the field construction operation and lightens the workload and the labor intensity. The inner keel, the outer keel, the template and the screw rod can be repeatedly used so as to save the cost, ensure the construction safety of the template and improve the forming quality of the concrete column; meanwhile, the fixing device adopts common materials, thereby lowering the cost and being convenient for popularization and application.
Owner:JIANGSU HUAJIAN CONSTR

Full-tail paste composite material and preparation method thereof

The invention discloses a full-tail paste composite material and a preparation method thereof, which belong to the field of inorganic nonmetallic material. The composite material consists of the following raw materials in percentage by weight: 2.8 to 22.0 percent of gelling agent 1, 57.8 to 75.0 percent of filling aggregate 2, 14.8 to 24.8 percent of water 3 and the balance of coagulant 4 which is 10 to 30 percent of the weight of the gelling agent, wherein the filling aggregate 2 consists of full-tail sand 8, water granulated slags 9 or gravels 10; the gelling agent is continuously and uniformly added into a pasty sizing agent by a metering device 5; one end of the metering device 5 is connected with a coagulant container and a water tank, and the other end of the metering device 5 is connected with a section of small-diameter pipeline 6 on a filling main pipe; a one-way check valve 7 is arranged behind the metering device 5 to ensure the flow direction of the coagulant 4; and a small amount of gelling agent is added into the filling sizing agent, so that the setting time can be kept between 30 minutes and 1,200 minutes. By adopting the method, the setting time of the paste material can be adjusted, the cycle period of a slope is shortened, field operation is convenient, and a reliable effect is achieved. The method is suitable for all kinds of full-tail paste filling materials of metal mines.
Owner:UNIV OF SCI & TECH BEIJING

Fluorescence labeling acrylic acid-sodium acrylic sulphonate co-polymer water treatment agent and preparation method thereof

The present invention discloses a fluorescence labeled acroleic acid-sodium allylsulfonate copolymer and a method for preparing the same. The method comprises the following steps: 4-bromine-1,8-naphthalic anhydride, methylamine, N-methyl diethylenediamine, and the like are used as material and is subject to amidation reaction, amination reaction, and quaternization reaction to be synthesized, and a novel fluorescence monomer 4-(N'-methyl-1-diethylenediamine)-N-methyl-1,8-naphthalimide allyl chloride quaternary ammonium salt is obtained by synthesis; and then the fluorescence monomer is copolymerized with sodium hypophosphite, acroleic acid and sodium allylsulfonate to obtain the FC-AA-SAS product. The raw materials for synthesizing the fluorescence monomer and the polymer are easy to obtain and the reaction conditions are mild. When the product is used in circulating water, the thickness of a medicament in a circulating water system can be accurately, duly and quickly measured through the variation of the fluorescence intensity, and the on-line medicine addition and the quantitative control are realized. Therefore, the on-site operation is largely simplified, and the management level is improved. The functional groups, such as sulfonic group, phosphino group and the like, are introduced into molecules, and thus the polymer has a plurality of functions, such as fluorescent tracing, anti-precipitation, disgregation and the like.
Owner:NANTONG UNIVERSITY

Optimum design method of drawing processing technology locus of servo press

The invention discloses an optimum design method of a drawing processing technology locus of a servo press. The optimum design method comprises the following steps of establishing a general mathematical model used for describing a movement locus of a slider block of the servo press by utilizing a Fourier series theory; establishing a drawing processing technology mode of the servo press by utilizing the acceleration and deceleration characteristic of a servo motor; establishing a crank acceleration and deceleration mathematical model based on a quintic polynomial; selecting an optimum design variable and establishing all kinds of constraint conditions which need to be met during operation of a press, the servo motor and a transmission manipulator; establishing an optimum target function; obtaining the drawing processing technology locus with a minimum stamping period of the servo press. The optimum design method adopts the Fourier series theory to construct the general mathematical model of a transmission mechanism of the servo press at high precision, and is suitable for any transmission mechanism configuration and different mechanism sizes, and is strong in universality. The optimum design method adopts a compound optimization algorithm and a computing method of classifying the constraint conditions, so that the optimal computation efficiency is high to meet the engineering instantaneity requirement.
Owner:DALIAN DESIGN INST CO LTD CHINA FIRST HEAVY IND +1

Grouting material for processing Tibet heritage building fresco detached mural and preparation method thereof

The invention discloses a grouting material used for controlling detached murals of Tibetan antique buildings, and a production method thereof. The material mainly contains PS as major component, coal ash, Aga soil and sodium fluosilicate. The grouting material is innoxious and odorless, doesn't cause environmental pollution or damage murals. Based on mural consolidation by using the grouting material, the invention can efficiently control the spread of detached murals of Tibetan antique buildings and provides a feasible approach to the consolidation of large-area detachment and stripping of murals of Tibetan antique buildings.
Owner:敦煌研究院文物保护技术服务中心

Method for throwing and fishing out underground restrictor from gas well without utilizing steel wires

The invention relates to a method for throwing and fishing out an underground restrictor from a gas well without utilizing steel wires, which is applied to gas production in the gas well. The method comprises the following steps: before throwing, placing an underground restrictor working barrel into a position of projected depth in the gas well; then installing a throwing and fishing catcher and an underground restrictor core, throwing the underground restrictor core, enabling the underground restrictor core to enter into the underground restrictor working barrel and be automatically locked and finishing throwing the underground restrictor core; and in the process of fishing, installing the throwing and fishing catcher and a fisher and fishing out the underground restrictor core. The lifting force of natural gas flow is utilized to lift the fisher and the underground restrictor core to the ground together. The invention has the effects that the on-site operation of the underground restrictor can be more convenient under the premise of not reducing the use effect of the underground restrictor; and compared with the process of throwing and fishing out the underground restrictor by utilizing a well testing truck, the method of the invention has the advantages of simple throwing and fishing process and simple and convenient on-site operation, not only can accurately and reliably throw the underground restrictor but also save throwing and fishing time and reduce throwing and fishing expenses.
Owner:PETROCHINA CO LTD

On-line repair method and special combined machine tool thereof

The present invention provides a kind of special combination machine tool repairing the large-scale unmovable overhead device; it possesses all kinds of function such as boring, milling and cutting and belongs to the machining device field. According to different machining object the present invention can assemble and unassemble different machine tool, many functions can be piled up. The machine tool structure adopts floor milling machine frame, and its circuit adopts one-drive-two frequency conversion control technique, to fit milling, boring and cutting device together. The machine tool can quickly move toward three-dimensional direction and lock any direction to make machining steady going. Moreover it has highly precision and simple machine structure.
Owner:NANJING NANGANG IND DEV CO LTD

Process for treating salt deposition in fractionating tower

ActiveCN102373066AAvoid time-consuming, reduce volumeDisadvantages of Avoiding Plant DowntimeThermal non-catalytic crackingDistillation corrosion inhibitionRefluxAlcohol
The present invention discloses a process for treating salt deposition in a fractionating tower. A purpose of the present invention is to overcome disadvantages of time consuming, device shutdown or amount reducing, hidden danger of corrosion, and the like in the prior art, wherein the amount is the amount of the deposited salt. The method comprises that: a salt deposition inhibitor is consecutively added to the an oil product before the oil product enters a tower top reflux pipeline of the fractionating tower or a tower top circulating pump inlet of the fractionating tower, wherein 30-60 mg of the salt deposition inhibitor is added to per kg of the oil product in the tower top reflux pipeline of the fractionating tower or the tower top circulating pump inlet of the fractionating tower, the adding time is 30-60 hours, the salt deposition inhibitor comprises, by weight, 30-70% of an aliphatic nitrogen compound, 10-30% of alkyl alcohol and 20-40% of an organic solvent.
Owner:CHINA PETROLEUM & CHEM CORP +1

Dust suppressant as well as preparation method and application thereof

The invention discloses a dust suppressant as well as a preparation method and an application thereof. Based on 100 parts by weight, the dust suppressant consists of 8-10 parts of pure acrylic emulsion, 0.2-0.4 part of sodium dodecyl sulfate, 0.2-0.4 part of sodium carboxymethyl cellulose, 1-2 parts of starch, 0.1-0.2 part of anhydrous sodium sulfate and the balance of water. The preparation method for the dust suppressant comprises the following steps: heating water until boiling, adding the pure acrylic emulsion and the sodium dodecyl sulfate, controlling the temperature to 75-95 DEG C to stir for 20-50 minutes, then, adding the starch and the anhydrous sodium sulfate, controlling the temperature to 75-95 DEG C to further stir for 20-60 minutes, then, adding sodium carboxymethyl cellulose to for further stir for 20-60 minutes, and cooling to the room temperature, thereby obtaining the dust suppressant which is environmentally friendly, low in cost and free of secondary pollution. The dust suppressant disclosed by the invention is used for suppressing dust in a powder storage yard, wherein the dust suppressing rate is up to over 85%.
Owner:SHANGHAI INST OF TECH

Double-sided forming welding process of FGB process one-sided submerged arc welding

The invention discloses a double-sided forming welding process of FGB process one-sided submerged arc welding. The process comprises the steps of: S1, butt-jointing ground two to-be welded steel plates to from a groove; S2, adhering a liner; and S3, when the groove is a V-shaped groove, filling alloy powder and then covering the groove with sintered flux and when the groove is an I-shaped groove, covering the groove with sintered flux, and pulling a welding wire for submerged-arc welding for automatic primary formed welding through a submerged arc welding machine for the I-shaped groove or the V-shaped groove covered by the sintered flux, wherein the welding parameters are as follows: the welding current is 400-1200A, the welding voltage is 25-45V and the welding speed is 10-80cm / min. By improving the composition ratio of raw materials of the sintered flux, the alloy powder and the ceramic liner, different welding modes are adopted due to different thicknesses of the welded steel plates; angular deformation is effectively avoided on the basis of improvement of the welding efficiency, and the process has the beneficial effects of simple field operation and wide application range.
Owner:武汉天高熔接股份有限公司

Foam cyclic utilization method used for under balance drilling

The invention relates to a method for cyclically utilizing foam, which is used for oil and gas exploitation, mining and non-excavation ground drilling and for the underbalanced well drilling and can increase the service efficiency of vesicant and reduce the environmental pollution and the cost of drilling fluids. The technical scheme is as follows: a cyclic foam system consists of a foam base fluid-CaCl2-Na2CO3; the foam base fluid comprises crisp foam, or stable foam, or three-phase foam; a water solution with anionic surfactant is used for the crisp foam, a water solution with the anionic surfactant and foam stabilization tackifier is used for the stable foam, and a water solution with the anionic surfactant, the foam stabilization tackifier and swell soil is used for the three-phase foam; the air input and the quantity of the foam base fluid are adjusted firstly to gain the foam, and a valve is opened to inject the foam into a well; after being cyclically led out from the mouth of the well, the foam is added with a CaCl2 water solution for defoaming; after drill chips are removed, a Na2CO3 solution is added to restore the foamability; and then the solution is led into a generator for foaming again. The method can realize multiple times of cyclic utilization of the foam base fluid, and has simple process and convenient operation.
Owner:SOUTHWEST PETROLEUM UNIV

IT device cabinet U bit management method and U bit manager

The present invention discloses an IT cabinet U bit management method and a U bit manager. According to the method, a management terminal, i.e. a U bit manager is used to receive and store a background task, and then the task is compared with U bit state information, and then the U bit state information or preset information is sent to a background server according to a comparison result and the task or not. The U bit manager disclosed by the present invention is a management terminal with a self-determining function, wherein the U bit manager compares detected current U bit state information with stored last-time U bit state information, and returns state information of a U bit of which state information is changed to the background server, so as to update a U bit information list. Therefore, data returned from the management terminal to the background is greatly decreased, the demands for the communication network and the background server are reduced, and the IT device management efficiency is improved.
Owner:华西信息工程江苏有限公司

Method used for detecting low voltage operation capability of reactive power compensator in wind power field

ActiveCN105548741AImprove reliabilityReal reflection of low voltage operation capabilityElectrical testingLow voltageVoltage drop
The invention provides a method used for detecting low voltage operation capability of a reactive power compensator in a wind power field. The method comprises steps that a voltage drop generation device is connected with a power generation line of the reactive power compensator in the wind power field; a voltage tracking control point is set, and parameter setting of the reactive power compensator is adjusted; an operation power of the reactive power compensator is limited, a set value protection mode of the line and the reactive power compensator is adjusted to make the voltage drop generation device and the reactive power compensator be matched in capacity, and tests are carried out on the condition of safety; the low voltage operation capability of the reactive power compensator is analyzed according to the test result. According to the method, characteristic parameters of the reactive power compensator in the wind power field are adjusted, technical support is provided for electric power scheduling departments, wind power field service providers and relevant detection mechanisms, and whether the reactive power compensator has the low voltage operation capability can be effectively verified.
Owner:CHINA ELECTRIC POWER RES INST +4
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