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39results about How to "Avoid large fluctuations" patented technology
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An air-conditioner
ActiveCN101532747AMeet comfort requirementsAvoid large fluctuationsCompression machines with several condensersCompression machines with several evaporatorsEvaporatorEngineering
The present invention discloses an air-conditioner which can be used for continuous heating and constant temperature dehumidification and has features of improving the indoor amenity in the defrost dehumidification process. The air-conditioner includes compressors, electromagnetic four-way valves, evaporators, throttling devices and condensers connected in sequence to form recycle loops, at least two compressors, electromagnetic four-way valves, evaporators, throttling devices and condensers are respectively provided to form at least two independent recycle loops. By setting at least two independent recycle loops, part of recycle loop adopts heat-production operation in the defrost and dehumidification process, while part of recycle loop adopts refrigeration operation so that it can continuously provide heat in the defrost and dehumidification process, to satisfy the amenity requirement of defrost and dehumidification, and can effectively prevent greater fluctuation of the indoor temperature, especially suitable for promoting in the use of heat pump air conditioning system.
Owner:四川长虹空调有限公司
Method, device and equipment for estimating residual driving mileage and purely electric vehicle
InactiveCN107933317AAccurate estimateAvoid large fluctuationsElectric devicesOperating modesElectric vehicleKalman filter
The invention discloses a method, a device, equipment and a computer readable storage medium for estimating residual driving mileage. The method comprises the following steps: calculating a measured value of average power consumption of a purely electric vehicle within the first preset distance; judging the current working condition of the purely electric vehicle; if the current working conditionof the purely electric vehicle is driving running, optimizing the measured value of the average power consumption by utilizing Kalman filtering so as to obtain the optimal estimated value of the average power consumption within the first preset distance; and estimating the residual driving mileage of the purely electric vehicle by utilizing the optimal estimated value of the average power consumption and the residual electric quantity of the purely electric vehicle. The method, the device, the equipment and the computer storage medium provided by the invention can inhibit great fluctuation ofthe estimated value of the residual driving mileage. The invention also provides the purely electric vehicle which comprises the equipment used for estimating the residual driving mileage and capableof relatively quickly and accurately estimating the residual driving mileage.
Owner:BORGWARD AUTOMOTIVE CHINA CO LTD
Multicarrier communication apparatus, multicarrier communication system, and transmission power control method
ActiveUS8014454B2Fast convergenceReduce the amount of informationEnergy efficient ICTPower managementSubcarrier pairingCommunications system
A multicarrier communication apparatus capable of reducing an amount of information required for feedback, making a range of transmission power fluctuation small, and achieving rapid convergence on a target transmission power is disclosed. With this apparatus, subcarrier pair determination section (1142) puts a plurality of subcarriers contained in a multicarrier signal into pairs, notifies combining section (106) of information pertaining to the pairs of subcarriers, combines received power of each pair of subcarriers, and outputs combined received power obtained in this manner to command producing section (1146). Target power storage section (1144) stores target power for received power in such a manner that SIR at the subject apparatus becomes a desired SIR. Command producing section (1146) compares combined received power for the pairs of subcarriers and target received power, produces a command indicating a difference in power between these two received powers, and generates a control signal containing the produced command.
Owner:INTERDIGITAL PATENT HLDG INC
Coal bed methane drainage and production control method and device
InactiveCN105756624AAvoid large fluctuationsDefects affecting service lifeFluid removalCoalControl period
The invention discloses a coal bed methane drainage and production control method and device and belongs to the field of coal bed methane drainage and production. The method comprises the following steps: a production type of a coal bed methane well is acquired; if the production type of the coal bed methane well is a water-lowering well type, the frequency of an acquisition frequency converter is controlled according to a first time period as a control period; if the production type of the coal bed methane well is a pressure stabilizing well type, the frequency of the acquisition frequency converter is controlled according to a second time period as the control period. Corresponding time period is selected as the control period according to the production type of the coal bed methane well for control of the frequency of the acquisition frequency converter; the frequency adjustment range of the acquisition frequency converter is determined according to the bottomhole flowing pressure of the current control period and the ideal bottomhole flowing pressure of the current control period. Great fluctuation of the bottomhole flowing pressure due to frequent adjustment of the frequency of the acquisition frequency converter is avoided, and the defect that the service life of drainage and production equipment is affected by frequent adjustment of the drainage and production equipment is overcome; the production efficiency for drainage and production of coal bed methane is increased.
Owner:PETROCHINA CO LTD
End-group functionalized comb structure polycarboxylic acid and method for preparing the same
ActiveUS20200216619A1Good application prospectImprove market competitivenessPolymer scienceHalohydrocarbon
A method for preparing comb structure temperature / pH-responsive polycarboxylic acid by end-group functionalization adopts temperature / pH-responsive monomer, unsaturated halogenated hydrocarbon, small monomer of carboxylic acid and other raw materials to prepare polycarboxylic acid material via self-polymerization, substitution and copolymerization. Temperature / pH-responsive monomers are first self-polymerized to obtain temperature / pH-responsive polymer chain with end-group functionalization, and then substitution with unsaturated halogenated hydrocarbons is conducted to obtain temperature / pH-responsive macromonomers with end-group functionalization, finally the obtained product is copolymerized with small carboxylic acid monomers to prepare comb structure polymer with polycarboxylic acid main chain and temperature / pH-responsive side chain.
Owner:BEIJING UNIV OF TECH
Microphone system and amplifying circuit
InactiveCN106658287AAvoid large fluctuationsImprove signal-to-noise ratioSignal processingTransducer circuitsSignal-to-noise ratio (imaging)Low-pass filter
The invention discloses a microphone system and an amplifying circuit. The microphone system comprises a sensitive structure, the amplifying circuit comprises a buffer circuit used for performing buffer according to a first voltage signal output by the sensitive structure to obtain a second voltage signal; and a conditioning circuit used for receiving the second voltage signal, wherein a part of elements in the amplifying circuit form a passive low-pass filter structure, and the frequency characteristics of the passive low-pass filter structure provide correction for the frequency characteristic of the microphone system in a target band. Compared with the prior art, the embodiment of the invention further improves the signal-to-noise ratio of the microphone system while avoiding increasing the processing difficulty, improves the smoothness of the sensitivity of the system in the band, and meanwhile has the advantages of convenience and low cost.
Owner:SHANDONG GETTOP ACOUSTIC
Device and method for restraining laser-induced plasma in high power laser deep penetration welding
ActiveCN103341689AInhibition of Diffusion ExpansionReduce volatilityLaser beam welding apparatusHigh power lasersCopper
The invention discloses a device for restraining a laser-induced plasma in high power laser deep penetration welding. The device comprises a cooling copper block, a floating gas curtain and a positioning part. The cooling copper block comprises two axisymmetric parts, an arc-shaped surface is arranged towards a weld joint side, and the cooling copper block is cooled relying on circulating water; the floating gas curtain is arranged on the bottom of the cooling copper block and uniformly sprays inert gas with a certain flow; the positioning part is used for fixing a restraining structure on a laser welding operating head and keeping the relative positions of the restraining structure and the laser welding operating head fixed. Meanwhile, the invention discloses a method for restraining the laser-induced plasma in the high power laser deep penetration welding. According to the device and the method, expansion of the laser-induced plasma in the three-dimensional direction is restrained in a high power laser welding process, the amplitude of fluctuation of the laser-induced plasma is reduced, thus a stable welding process and good formation of weld joints are obtained, and the device can be widely applied to the high power laser deep penetration welding field.
Owner:SHANGHAI JIAO TONG UNIV
Vehicle brake apparatus
ActiveUS20150203083A1Decreased pressureQuickly releaseBraking action transmissionRotary clutchesFuel tankVehicle brake
A holding valve (61) is provided on an individual flow passage (51) connecting a main flow passage (52) and a wheel cylinder (42) to each other. The holding valve (61) permits communication between an upstream side and a downstream side in an open state to transmit the hydraulic pressure from an accumulator (32) to the wheel cylinder (42), and shuts off the communication between the upstream side and the downstream side in a closed state. Moreover, a pressure reducing valve (62) for realizing communication or shutoff between a reservoir (22) and a main flow passage (52) and between the reservoir (22) and the wheel cylinder (42) is provided on a pressure reducing individual flow passage (56) for connecting a reservoir flow passage (57) and the individual flow passage (51) to each other. Then, when a driver carries out a return operation on a brake pedal (10) during antiskid control, a brake ECU (100) inhibits the holding valve (61) in the closed state from shifting to the open state, maintains the holding valve (61) in the open state, and controls the pressure reducing valve (62) corresponding to this holding valve (61) to shift to the open state. As a result, a hydraulic pressure in the main flow passage (52) is decreased via the holding valve (61) and the pressure reducing valve (62) in the open state.
Owner:TOYOTA JIDOSHA KK
Power control method of fuel cell system
ActiveCN111258365AAvoid large fluctuationsDoes not accelerate life decayFuel cellsElectric variable regulationThermodynamicsFuel cells
The invention provides a power control method of a fuel cell system. The power control method comprises the following steps: starting the fuel cell system; judging whether the fuel cell system is in arunning state or not, and if yes, acquiring riding demand power Preq; solving target current Ireq according to a power-current relation obtained in advance, and enabling output current Iout of a fuelcell to be equal to the target current Ireq; acquiring actual output power Po of the fuel cell and judging whether the actual output power is in a steady state or not; if yes, calculating power deviation and judging whether the rate deviation delta P = Preq-Po is greater than or equal to a preset threshold Pt or not, and if yes, calculating current deviation delta I according to the output current Iout, the required power Preq and the power deviation delta P; and allowing the output current of the fuel cell to be equal to Iout + delta I. The method has the advantages that the maximum net output power of a fuel cell stack is estimated without depending on the identification process of a polarization curve, and the method is suitable for more application scenes; output current fluctuation of a galvanic pile cannot be caused; and the service life attenuation of the galvanic pile cannot be accelerated.
Owner:BEIJING SINOHYTEC
Raw garbage treatment apparatus and a cutter thereof
InactiveUS7011260B2Many of characteristicAvoid large fluctuationsGrain huskingGrain polishingEngineeringMechanical engineering
A raw garbage treatment apparatus including a treatment tank 10, a rotating shaft 32 which rises in an upright attitude from the center of the bottom of the treatment tank, a motor 36 which rotates the rotating shaft from beneath the treatment tank, a plurality of rotating blades 58 which have cutting vanes 58A that extend outward with the rotating shaft as the center and which are provided on the rotating shaft at intervals from each other, a plurality of fixed blades 60 through which the rotating shaft rotatably passes and which form a main cutter A together with the rotating blades, and a supporting frame 38 which has vertical plates 40 that hold the outer end portions of the fixed blades and whose upper end is fastened to the upper portion of the inside of the treatment tank.
Owner:IZUMI PROD CO
Edoxaban sustained-release tablet pharmaceutical composition and preparation method thereof
InactiveCN107773547AEfficient releaseEffectively control the release speedOrganic active ingredientsPharmaceutical non-active ingredientsSustained Release TabletWater soluble
The invention discloses a pharmaceutical composition for edoxaban sustained-release tablets. The sustained-release tablet contains edoxaban, high-viscosity hypromellose, medium-viscosity hypromellose and a water-soluble filler, and also contains Other pharmaceutical excipients. The invention also discloses a preparation method of the edoxaban sustained-release tablet pharmaceutical composition.
Owner:TIANJIN HANKANG PHARMA BIOTECH
Building method of aluminum electrolysis cell
The invention relates to a building method of an aluminum electrolysis cell, which comprises a conventional building method and comprises the following building steps: (1) when cathode blocks of the electrolysis cell are manufactured, symmetrically chamfering the upper end part of each cathode block along the longitudinal direction, and forming a transverse groove at the top of each cathode block; (2) when the cathode blocks are built, reserving a gap of 20-40mm between every two adjacent cathode blocks, and tamping the gap by cathode tamping paste, wherein the opposite chamfers of the adjacent cathode blocks and the cathode tamping paste filled into the gap form a trapezoidal groove, and the depth of the trapezoidal groove is the same as the depth of the transverse groove at the top of each cathode block; and (3) forming one or two longitudinal grooves at the bottom of each cathode block, laying steel bars of corresponding sizes in each longitudinal groove, and tamping the gap between each cathode block and each steel bar by cathode steel bar paste. The aluminum electrolysis cell built by the method can greatly reduce the horizontal current in aluminum liquid to enable the current density of the cathode blocks and the cathode steel bars to be more uniform, thereby greatly prolonging the service life of the electrolysis cell.
Owner:SNTO TECH GRP
Scroll compressor
InactiveUS6939116B2Avoid large fluctuationsPrevent rotationRotary/oscillating piston combinations for elastic fluidsYielding couplingCouplingControl theory
In a scroll compressor, a sliding direction of a Oldham coupling is defined such that an acting direction of an inertia force of the Oldham coupling is substantially opposite to an acting direction of a reaction force by gas compression, and thereby a range of fluctuation of a total torque of a first rotational torque acting on an orbiting scroll by the reaction force of gas compression and a second rotational torque of sliding movement of the Oldham coupling becomes smaller than that of the first rotational torque to suppress a noise and vibration caused by fluctuation of a rotational torque of the orbiting scroll without any limited designing of an involute shape thereof.
Owner:DAIKIN IND LTD
Upright upflow reactor
InactiveCN104162384AAvoid large fluctuationsReduce imbalanceTreatment with hydrotreatment processesChemical/physical processesHydrogenation processEngineering
The invention relates to an upright upflow reactor which is particularly suitable for pre-hydrogenation process of medium / low-temperature coal tar. In the whole material flow flowing direction in the reactor, one or two or more catalyst bed layers can be arranged in the reactor, the catalyst bed layers can be fixed beds and / or expanded beds and / or online replacement beds and / or suspended beds and / or fluidized beds, at least one separator arranged in the vertical direction is arranged in a reaction space inside the reactor, the space on two sides of the separator is relatively separated, the independence is enhanced, long-distance movement in the horizontal direction of air bubbles and / or droplets and / or catalyst particles on two sides of the separator is weakened, the air bubbles in the reaction space are prevented from merging and enlarging, fluctuation amplitude of clear liquid phase height of the bed layers in the vertical direction is weakened, namely imbalance of pressure difference of the bed layers in the vertical direction is weakened. The reactor is simple in structure, feeding distribution imbalance can be effectively weakened, and hot spots on the horizontal section are avoided.
Owner:何巨堂 +1
Automatic ignition control system and method for stove burning of hot blast stove
ActiveCN105648130AAvoid large fluctuationsAvoid wastingBlast furnace detailsHeating stovesProportional controlCombustion
The invention discloses an automatic ignition control system and method for stove burning of a hot blast stove. The system at least comprises an air slope setter, an air flow signal selector, an air flow adjuster, a coal gas slope setter, a coal gas flow signal selector and a coal gas flow adjuster. According to the method, after a combustion signal is received, an air flow set value output to the air flow adjuster by the air slope setter is gradually increased, and a combustion-supporting air adjusting valve is controlled to gradually increase an air flow; the coal gas flow set value on an input port of the coal gas slope setter follows the air flow actual-measurement value to be gradually increased, and is output to the coal gas flow adjuster, and a coal gas adjuster is controlled to increase the coal gas amount, so that ignition is achieved; an ignition task is completed until the air flow actual-measurement value is equal to the set value of the air slope setter, and the coal gas flow actual-measurement value is equal to the set value of the coal gas slope setter; and finally, the normal stove burning process is executed through the air flow adjuster and the coal gas flow adjuster. According to the system and method, flow stable control can be effectively achieved, the coal gas flow follows the air flow actual-measurement value to achieve proportional control, and automatic and safe ignition is achieved.
Owner:WISDRI ENG & RES INC LTD
Scale and corrosion inhibitor performance test dynamic simulation device and control method thereof
ActiveCN107817209ALiquid level stabilityAvoid large fluctuationsWeather/light/corrosion resistanceDynamic simulationDynamic simulation model
The invention relates to a scale and corrosion inhibitor performance test dynamic simulation device and a control method thereof. The scale and corrosion inhibitor performance test dynamic simulationdevice comprises a controller, a pressure kettle, a discharging unit, a feeding unit and a pressure regulating unit, wherein the controller is connected with the pressure kettle, the discharging unit,the feeding unit and the pressure regulating unit; the feeding unit is connected with the pressure kettle and feeds materials into the pressure kettle, and the feeding unit comprises a feeding material metering device used for metering the feeding amount; the discharging unit is connected with the pressure kettle and used for receiving discharged materials of the pressure kettle, and comprises adischarging material metering device used for metering the discharging amount; and the pressure regulating unit is used for monitoring and regulating the pressure in the pressure kettle. According tothe device, the discharging speed and test pressure can be set, the heating power of the pressure kettle can be regulated automatically according to the discharging speed, and as the feeding materialand discharging material are metered and controlled simultaneously, the feeding speed and discharging speed are kept balance, intensive fluctuation of pressure or temperature in the test process can be avoided, and the total amount of concentrated materials in the pressure kettle can be maintained stable.
Owner:深圳市质量安全检验检测研究院
Microphone system and amplifying circuit
InactiveCN106658303AImprove signal-to-noise ratioFlexible designSignal processingFrequency response correctionSignal-to-noise ratio (imaging)Frequency band
The invention discloses a microphone system and an amplifying circuit. The amplifying circuit comprises a buffer circuit, a conditioning circuit and a driving circuit, wherein the buffer circuit is used for buffering a first voltage signal so as to acquire a second voltage signal; the conditioning circuit is used for receiving the second voltage signal and outputting a third voltage signal; the driving circuit is used for driving the third voltage signal so as to acquire an output voltage signal. The conditioning circuit and the driving circuit form an active filtering structure, or the conditioning circuit independently forms an active filtering structure. Frequency characteristics of the active filtering structure provide supplementation and correction for frequency characteristics of the second voltage signal in a target frequency band, so that the microphone system is enabled to realize noise optimization and frequency response planarization in the target frequency band. Compared with the prior art, the embodiment of the invention further improves the signal to noise ratio of the microphone system while avoiding increase in processing difficulty, and increases the flatness of the system sensitivity in the frequency band. Meanwhile, the microphone system has the advantages of high flexibility and low cost.
Owner:SHANDONG GETTOP ACOUSTIC
Eight-input balance function block structure and method for thermal power generating unit
PendingCN111624932AAdjust the total balanceAvoid large fluctuationsProgramme controlComputer controlControl engineeringProcess engineering
The invention discloses an eight-input balance function block structure and method for a thermal power generating unit. The eight-input balance function block structure comprises an engineer station,an operator station, a switch, a controller, a first analog quantity input terminal board, a first analog quantity input card component, a second analog quantity input terminal board, a second analogquantity input card component, a switching value input terminal board, a switching value input card component, an analog quantity output card component, an analog quantity output terminal board, a switching value output card component and a switching value output terminal board. The structure is clear and simple and can support eight paths of parallel equipment to carry out balance operation, wherein a transmission mode and a non-transmission mode are flexibly switched, a normal working mode and a balance working mode are supported in the non-transmission mode, and three value taking modes ofa maximum value, a minimum value and a mean value are supported.
Owner:XIAN THERMAL POWER RES INST CO LTD
Signal remote transmission gas relay
PendingCN112435888AExternal structure improvementThe external structure ensuresHigh-tension/heavy-dress switchesAir-break switchesOil canControl theory
The invention provides a signal remote transmission gas relay. According to the technical scheme, the external structure of the gas relay is improved, and meanwhile, the image acquisition module is introduced. Specifically, the bottom face of the containing cavity is designed to be the inclined face so that one-way movement of oil can be guaranteed, and meanwhile the middle partition plate is additionally arranged so that large fluctuation can be avoided in the oil flowing process. On the basis, the camera is additionally arranged at the top of the device, a liquid level image can be transmitted to a background in real time and remotely monitored by a worker, and frequent on-site checking actions are omitted. In addition, the sleeve is used for protecting the binding post, and a circuit can enter and exit from the side end; and during maintenance, the flange cover at the upper end can be opened, so that the installation and maintenance of the equipment are not influenced. According tothe invention, the oil level monitoring efficiency of the gas relay is improved, and a more perfect protection structure is provided.
Owner:XIAN YA NENG ELECTRIC CO LTD
A Calculation Method of Supply-production Balance Speed of Electric Submersible Direct Drive Screw Pump Production Well
ActiveCN111119794BRealize adaptive intelligent adjustmentReal-time adjustment of running speedSurveyFluid removalElectric machineScrew pump
Owner:PETROCHINA CO LTD
Method for calculating supply and production balance rotating speed of electric submersible direct drive screw pump oil production well
ActiveCN111119794AAvoid dry grindingAvoid problems such as burning the motorSurveyFluid removalElectric machineOil production
Disclosed is a method for calculating the supply and production balance rotating speed of an electric submersible direct drive screw pump oil production well. The method comprises the steps that S1, an initial supply and production balance rotating speed is calculated, particularly, under the condition that the stratum liquid supply quantity is stable, an initial oil well supply and production balance rotating speed matched with the current stratum liquid supply quantity is calculated; S2, a supply and production balance rotating speed in the operation process is calculated, particularly, whenthe stratum liquid supply quantity changes, the fluctuation value of the dynamic liquid level of an oil well in the operation process of the electric submersible direct drive screw pump at the initial oil well supply and production balance rotating speed, and the initial oil well supply and production balance rotating speed is adjusted to obtain the supply and production balance rotating speed inthe operation process. The operation rotating speed of the electric submersible direct drive screw pump unit is automatically adjusted in real time according to the stratum liquid supply capacities of different oil wells, so that the oil wells reach supply and production balance, it is ensured that the oil wells operate in a reasonable flow pressure range, the problems of screw pump empty pumpingdry grinding, motor burning and the like caused by insufficient liquid supply of the oil wells due to overhigh rotating speed of screw pumps are avoided, and the influence of overlow rotating speed of the screw pumps on liquid supply of oil well stratums is also avoided.
Owner:PETROCHINA CO LTD
Low-power-consumption SAR ADC based on common-mode level switch switching and working method thereof
PendingCN114884508AReduce power consumptionAvoid large fluctuationsPower saving provisionsElectric signal transmission systemsCapacitanceComparator
The invention relates to a low-power-consumption SAR ADC based on common-mode level switch switching, which comprises a bootstrap switch module, a sectional capacitor array module based on a common-mode level switch switching mode, a comparator module, an asynchronous time sequence module and a latch module which are connected in sequence, a switch switching module is arranged among the sectional capacitor array module based on the common-mode level switch switching mode, the asynchronous time sequence module and the latch module; the bootstrap switch module samples a VIN input signal and a VIP input signal to complete signal transmission; compared with the prior art, the low-power-consumption SAR ADC based on switching of the common-mode level switch is provided, the capacitor array module is of a sectional structure, the capacitor array switching mode based on the common-mode level can well avoid large-amplitude fluctuation of an input common-mode range, and the requirement for a comparator module is lowered.
Owner:SHANDONG UNIV
Method, device, equipment and pure electric vehicle for estimating remaining mileage
InactiveCN107933317BAccurate estimateAvoid large fluctuationsElectric devicesOperating modesEngineeringPure electric vehicle
The invention discloses a method, a device, equipment and a computer readable storage medium for estimating residual driving mileage. The method comprises the following steps: calculating a measured value of average power consumption of a purely electric vehicle within the first preset distance; judging the current working condition of the purely electric vehicle; if the current working conditionof the purely electric vehicle is driving running, optimizing the measured value of the average power consumption by utilizing Kalman filtering so as to obtain the optimal estimated value of the average power consumption within the first preset distance; and estimating the residual driving mileage of the purely electric vehicle by utilizing the optimal estimated value of the average power consumption and the residual electric quantity of the purely electric vehicle. The method, the device, the equipment and the computer storage medium provided by the invention can inhibit great fluctuation ofthe estimated value of the residual driving mileage. The invention also provides the purely electric vehicle which comprises the equipment used for estimating the residual driving mileage and capableof relatively quickly and accurately estimating the residual driving mileage.
Owner:BORGWARD AUTOMOTIVE CHINA CO LTD
A Complete Set of Optimal Control Method for Ethylene Cracking Furnace
ActiveCN103294015BHigh yieldAchieve energy-saving optimizationThermal non-catalytic crackingTotal factory controlCombustion chamberOptimal control
The invention discloses a set of optimization control methods of an ethylene cracking furnace. The set of optimization control methods of the ethylene cracking furnace comprises the following steps of establishing a cracking depth model, implementing COT advanced control, optimizing key technology parameters, realizing integrated application, establishing a combustion chamber flame diagnostic system, and establishing a cracking furnace energy management system. By the adoption of the set of optimization control methods of the ethylene cracking furnace, efficiency of ethylene and propylene (or diene) is improved, and energy consumption of the ethylene cracking furnace is reduced. Optimization control over the realizing process reduces severer interference, caused by frequent manual operation, to the COT, the fluctuation amplitude of operation conducted when events, such as reduction of the fuel gas pressure and dryer switching occur is reduced, and therefore the level of the stableness rate of the COT of the whole device remains high. The cracking depth model of the cracking furnace is established, and operation conditions of different cracking working conditions are optimized, so that the yield of the diene is in a high level, and energy conservation and optimization of the cracking furnace are realized.
Owner:PETROCHINA CO LTD
Automatic ignition control system and method for hot blast stove
ActiveCN105648130BAvoid large fluctuationsAvoid wastingBlast furnace detailsHeating stovesCombustionProportional control
The invention discloses an automatic ignition control system and method for stove burning of a hot blast stove. The system at least comprises an air slope setter, an air flow signal selector, an air flow adjuster, a coal gas slope setter, a coal gas flow signal selector and a coal gas flow adjuster. According to the method, after a combustion signal is received, an air flow set value output to the air flow adjuster by the air slope setter is gradually increased, and a combustion-supporting air adjusting valve is controlled to gradually increase an air flow; the coal gas flow set value on an input port of the coal gas slope setter follows the air flow actual-measurement value to be gradually increased, and is output to the coal gas flow adjuster, and a coal gas adjuster is controlled to increase the coal gas amount, so that ignition is achieved; an ignition task is completed until the air flow actual-measurement value is equal to the set value of the air slope setter, and the coal gas flow actual-measurement value is equal to the set value of the coal gas slope setter; and finally, the normal stove burning process is executed through the air flow adjuster and the coal gas flow adjuster. According to the system and method, flow stable control can be effectively achieved, the coal gas flow follows the air flow actual-measurement value to achieve proportional control, and automatic and safe ignition is achieved.
Owner:WISDRI ENG & RES INC LTD
System and method for regulating and controlling pH value of dephenolization device
InactiveCN114115374AIncreased operating lifeAvoid large fluctuationsControlling ratio of multiple fluid flowsTransportation and packagingControl engineeringPh regulation
The invention discloses a system and method for regulating and controlling the pH value of a dephenolization device, and relates to the technical field of pH value regulation and control. Firstly, the real-time pH value of mixed feed liquid in a pipeline is measured, and a pH regulation and control target value is generated by taking a pH value controller AIC as a controller playing a real-time management and control role on the whole; the pH regulation and control target value and the flow of the acid solution are jointly used as input of a ratio controller, flow regulation and control of the alkaline solution are guided on the basis of the ratio of acid and alkali variables, and therefore the pH value is controlled in real time. The defect of non-linear change of the flow of an acid-base solution caused by a traditional mode of manually regulating feed liquid addition and decrement only by taking a measured value of a pH value online measuring meter as a reference is overcome, the phenomenon of large fluctuation of the pH value is avoided, the pH value is stably controlled in real time through cooperation of real-time feedback, the pH value is further controlled to be weak acid-base property, equipment corrosion is delayed, and the service life of equipment is prolonged. The service life of the dephenolization device is effectively prolonged.
Owner:宝钢化工湛江有限公司
An active flow field reconstruction air cooling tower
ActiveCN112611250BAvoid large fluctuationsAvoid volatilityHeat exchanger casingsCooling towerEngineering
Owner:JINAN UNIVERSITY
A method for coordinating current distribution for multiple charging modules
ActiveCN112319298BSolve Oscillation ProblemsAvoid large fluctuationsCharging stationsElectric powerOvervoltageCharge current
The present invention relates to a method for coordinating current distribution with multiple charging modules. According to charging power, the number of charging modules to be put into is N; The module uses constant voltage output as the voltage source, and its charging voltage is VH. As the charging progresses, when the rated current of the Nth charging module is lower than 20%, the Nth charging module is disconnected, and the N-1th charging module is disconnected. One charging module is used as the voltage source as the charging voltage, and the charging current of the remaining N‑2 charging modules is adjusted at the same time. On the premise of ensuring the charging current, this scheme adjusts the charging current based on the principle of safety orientation. At the same time, different charging modules are used as The current source and the voltage source separate the current source and the voltage source, so that the oscillation of the charging voltage will not be caused by the fluctuation of the charging current, and at the same time, the charging current of the voltage source can be used as the output adjustment of the entire charging current.
Owner:四川光慧新能源科技有限公司
Pallet truck and auxiliary wheel mechanism thereof
PendingCN108408652AExtended service lifeShorter maintenance and replacement cyclesLifting devicesEngineeringTruck
The invention discloses an auxiliary wheel mechanism of a pallet truck. The auxiliary wheel mechanism comprises a left supporting seat, a right supporting seat, an auxiliary support, a left auxiliarywheel assembly, a right auxiliary wheel assembly, a left shock absorbing assembly and a right shock absorbing assembly. Two ends of the auxiliary support are separately hinged between the left supporting seat and the right supporting seat. The left auxiliary wheel assembly and the right auxiliary wheel assembly are separately hinged to the bottom portions of two ends of the auxiliary support. Theleft shock absorbing assembly is fixedly connected between the top of the auxiliary support and the left supporting seat, and the right shock absorbing assembly is fixedly connected between the top ofthe auxiliary support and the right supporting seat. Since the left auxiliary wheel assembly and the right auxiliary wheel assembly are capable of achieving synchronous movement relative to a vehiclebody through the auxiliary support, and the left shock absorbing assembly and the right shock absorbing assembly are separately capable of absorbing vibration shock between the auxiliary support andthe left supporting seat and between the auxiliary support and the right supporting seat to further achieve the synchronous movement, and working alone is avoided, so that the service life is prolonged. The invention further discloses the pallet truck. The pallet truck is high in operational reliability.
Owner:HANGCHA GRP
LED lead frame and method for manufacturing LED using the lead frame
ActiveCN101207170BImprove consistencyAvoid large fluctuationsSemiconductor/solid-state device detailsSolid-state devicesEngineeringColloid
Owner:FOSHAN NATIONSTAR OPTOELECTRONICS CO LTD
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