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30results about How to "Fix running stability issues" patented technology
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Apparatus for automatically detecting insulating properties of electric power transmission line
ActiveCN105759182AGuaranteed timelinessAvoid unnecessary trouble caused by manual inspectionTesting dielectric strengthFault location by conductor typesElectric power transmissionElectric field sensor
The invention relates to an apparatus for automatically detecting insulating properties of an electric power transmission line. The apparatus is characterized by including an apparatus main body, a walking module, a measuring module, an outer expansion module, a secondary opening module, a power supply module, a control module and a wireless communication module. The control module, the power supply module, and the wireless communication module are mounted inside the apparatus main body. The power supply module and the other modules are connected so as to supply power to the other modules. The control module is connected to the walking module, the measuring module, the outer expansion module, the secondary opening module, and the wireless communication module so as to realize detection control function. According to the invention, the apparatus main body is moving on the electric power transmission line, and a temperature sensor and an electric field sensor are used individually for collecting temperature values and electric field intensity values at different positions of the electric power transmission line, and malfunction points are determined by the temperature values and the electric field intensity values in combination with a counter on a drive wheel. The apparatus of the invention guarantees timeliness of detection of the insulating properties of the electric power transmission line, effectively prevents unnecessary trouble brought by current method of artificial detection, and substantially increases detection efficiency.
Owner:HEBEI UNIV OF TECH
New energy power station dynamic reactive power compensation equipment application method and device
InactiveCN104868485AImprove running stabilityReduce single-phase ground capacitive currentSingle network parallel feeding arrangementsReactive power adjustment/elimination/compensationLow voltageNew energy
The invention discloses a new energy power station dynamic reactive power compensation equipment application method. The improved content is as follows: (1) the dynamic reactive power compensation equipment is connected onto a low voltage-side bus of a three-winding boost transformer, the middle voltage side of the three-winding boost transformer is connected with gathered new energy electric power, and the two are isolated via the transformer; (2) voltage at the high voltage side of the new energy power station serves as reactive power needed by a calculation system for calculating reference voltage and control target voltage; and (3) a novel electronic current voltage combined transformer is applied to a measurement control system for the dynamic reactive power compensation equipment. In view of problems of poor operation stability of the new energy power station and disqualified electric power quality, a dynamic reactive power compensation configuration technology which can be applied to grid-connected power generation of the new energy power station and meet grid requirements is brought forward, a dynamic reactive power compensation equipment mounting site is changed, the new energy collecting system and the reactive power compensation equipment can be effectively isolated, the problems of operation stability of the new energy power station compensation equipment and electric power quality can be solved, and operation stability of the reactive power compensation equipment is improved.
Owner:GANSU ELECTRIC POWER DESIGN INST
A new energy photovoltaic power generation distribution box with a good heat dissipation effect
InactiveCN109244892AFix running stability issuesSolve the service lifeSubstation/switching arrangement cooling/ventilationCold airNew energy
The invention discloses a new energy photovoltaic power generation distribution box with a good heat dissipation effect, which includes that box, A fan is fixedly installed on the top of the cabinet inner cavity, the air outlet ends of both sides of the fan are communicated with a condenser, one end of the condenser far away from the fan is communicated with a long pipe, one end of the long pipe far away from the condenser is communicated with a spray head, two sides of the cabinet inner cavity are fixedly connected with a frame, and the inner cavity of the frame is provided with a condensingpipe. The air blow is provided with a fan, condensers, long tubes and nozzles, as that cool air is blown toward the electrical components, so as to achieve the effect of cooling; the cooling water tank, the suction pump, the condensing pipe and the fan are arranged, so that the cooled liquid releases the cold air through the condensing pipe and blows to the electric components through the fan, thereby reducing the temperature of the electric components, and solving the problem that the temperature inside the distribution cabinet is too high for a long time, which will seriously affect the operation stability and the service life of the distribution equipment.
Owner:郑州杏坛电子科技有限公司
Multi-drive structure of primary air fan for thermal power station
PendingCN110145475AIncrease flexibilityIncrease usagePump componentsToothed gearingsPower stationCoupling
The invention relates to a multi-drive structure of a primary air fan for a thermal power station, belongs to the field of industrial steam supply energy conservation of the thermal power station, andaims to solve the problems that since cold reheat steam discharged by a turbine unit is subjected to temperature-reduction and pressure-reduction in order to meet the user demand parameters, the larger energy conservation loss is generated, and the waste of high-quality energy is caused. The multi-drive structure of the primary air fan for the thermal power station comprises a back pressure machine, a multi-axis variable-speed clutch, an electromotor, the primary air fan, a back pressure machine output end, a multi-axis variable-speed clutch input end A, a multi-axis variable-speed clutch input end B, a multi-axis variable-speed clutch output end, a primary air fan input end, an electromotor output end and three couplers, wherein the back pressure machine output end and the multi-axis variable-speed clutch input end A are connected through one coupler; the electromotor output end and the multi-axis variable-speed clutch input end B are connected through one coupler; and the multi-axisvariable-speed clutch output end and the primary air fan input end are connected through one coupler. The multi-drive structure of the primary air fan for the thermal power station provided by the invention is mainly applied to energy conservation of the thermal power station.
Owner:HARBIN GUANGHAN POWER TRANSMISSION +1
Two-step preparation method of 6-aminocapronitrile
ActiveCN113307746AFix running stability issuesSolve cokingOrganic compound preparationCarboxylic acid amides preparationPtru catalystProcess engineering
The invention relates to a two-step preparation method of 6-aminocapronitrile. The two-step preparation method comprises the following steps: carrying out ammonolysis reaction on caprolactam in an inert solvent or in a molten state and hot ammonia gas to obtain 6-aminohexanamide, and dehydrating the 6-aminohexanamide in the presence of a dehydrating agent to obtain 6-aminocapronitrile. According to the invention, ring-opening ammonolysis is carried out under an anhydrous condition, so that polymerization of ammonolysis products is effectively controlled, and generation of by-products is reduced; and under the condition of no catalyst, the dehydrating agent is directly used for dehydration reaction, so that the problems of catalyst coking, short catalyst service life and the like in a catalytic dehydration process are effectively avoided.
Owner:BEIJING RISUN TECH CO LTD
Shockproof transformer
PendingCN114156050AReduce swingReduce vibrationTransformers/reacts mounting/support/suspensionClassical mechanicsTransformer
The invention discloses a shockproof transformer which comprises square channel steel, a supporting frame and an upper top beam. The square channel steel is a square frame, and a connecting strip is welded in the frame; a base of the transformer body is welded on a connecting strip of the square channel steel; the bottom of the support frame is welded on a frame of the square channel steel; the upper top beam is fixed on the support frame; the upper top beam is fixedly connected with the transformer body; the support frame comprises at least four diagonal steel channels; the bottom ends of the cable-stayed channel steels are respectively fixed at four corners of the frame of the square channel steel; an acute included angle is formed between each cable-stayed steel channel and the plane where the square steel channel is located. According to the dry-type transformer, vibration borne by the transformer body can be effectively reduced, the transformer body can still be effectively supported under the severe earthquake condition, external impact borne by the transformer body is effectively reduced, and the problem of operation stability of an existing dry-type transformer in an earthquake-prone area can be solved.
Owner:XJ TRANSFORMER
Chain dynamic anti-falling matched rigid dynamic anti-falling device
The invention discloses a device with dynamic chain falling prevention matched with rigid dynamic falling prevention. The device comprises two rear stand columns, a front cross beam, two longitudinal beams, two mounting plates, two bearing seats, a traction driving shaft and a vehicle carrying plate. The two chain dynamic anti-falling units are used for preventing falling at the front end, and the rigid dynamic anti-falling unit is used for preventing falling at the rear end; the left longitudinal beam, the front cross beam, the right longitudinal beam, the traction driving shaft, the left bearing seat and the right bearing seat form an upper-layer rigid frame, so that a rear cross beam is saved; the chain dynamic anti-falling unit comprises a chain wheel, a chain wheel shaft, a traction rope wheel, a traction steel rope, a falling block, a chain and an anti-falling part, the simple mode that the chain directly penetrates through the rear stand column and the chain is matched with the steel rope for traction is adopted, performance is more stable, and manufacturing cost is saved; the rigid dynamic anti-falling unit comprises a left connecting piece, a right connecting piece, a rear connecting piece, a left rigid anti-falling part and a right rigid anti-falling part, and further comprises limiting rollers, the dynamic anti-falling function is achieved, and the lifting operation stability of the car carrying plate is improved.
Owner:佛山市诺行科技有限公司
Expansion machine refrigeration subcooling and nano particle jet flow minimal quantity lubrication supply system
ActiveCN106584279AFix the leakInto the uniformLiquid spraying apparatusGrinding/polishing safety devicesCold airThermal insulation
The invention discloses an expansion machine refrigeration subcooling and nano particle jet flow minimal quantity lubrication supply system. The system comprise an expansion machine, a nano fluid minimal quantity lubrication supply system and an outer mixing nozzle, wherein the expansion machine is used for conducting isentropic expansion cooling on compressed air introduced into the expansion machine so as to form low-temperature cold air; the nano fluid minimal quantity lubrication supply system comprises a pump, a camshaft and a piston, and the camshaft is connected with an electromagnetic speed-adjustable motor; the electromagnetic speed-adjustable motor is used for driving the camshaft to rotate so as to drive the pump and the piston to move periodically and oppositely, and accordingly nano fluid is conveyed into an oil conveying pipe; the outer mixing nozzle comprises a nozzle gas inlet tube and a nozzle spraying needle, the oil conveying tube stretches into the nozzle gas inlet tube, a thermal insulation tube is arranged between the oil conveying tube and the nozzle gas inlet tube, and the low-temperature cold air is introduced into the thermal insulation tube and the nozzle gas inlet tube; one end of the nozzle spraying needle communicates with the oil conveying tube, and the other end of the nozzle spraying needle outwards extends out of the outer mixing nozzle; and the nano fluid in the oil conveying tube is sprayed out of the nozzle spraying needle and atomized after being blended with the low-temperature cold air sprayed out of the outer mixing nozzle.
Owner:QINGDAO TECHNOLOGICAL UNIVERSITY
Low-power-consumption electric equipment, electricity utilization system and power supply method and device of electric equipment
PendingCN110190666AReduce electricity consumption costsAchieve recyclingBatteries circuit arrangementsElectric powerThermal energyElectricity
The invention relates to low-power-consumption electric equipment, an electricity utilization system and a power supply method and device of the electric equipment. The electric equipment comprises anelectricity utilization unit which is used for working after being powered and generating heat energy during working; a thermoelectric conversion unit which is used for converting the heat generatedby the electricity utilization unit into electric energy and storing the electric energy; a control unit which is used for controlling the thermoelectric conversion unit to supply power to the electric equipment when the electric energy stored in the thermoelectric conversion unit is greater than a first threshold value and controlling a power supply input end to be accessed to a power supply to supply power to the electric equipment when the electric energy stored in the thermoelectric conversion unit is less than a second threshold. According to the invention, the thermoelectric conversion unit converts heat energy dissipated by the electricity utilization unit into electric energy for reuse by electric equipment; the problem that the operation stability is influenced due to the temperature rise of the electric equipment caused by long-term operation of the electric equipment is solved, and reduction of the power consumption cost of the electric equipment is facilitated; the power consumption is reduced; and the economic pressure of a user is reduced.
Owner:GREE ELECTRIC APPLIANCES INC
Dual-way air-intake vascular refrigeator with corrugated pipe direct-current blocking-up structure
InactiveCN1304799CReduce lossesEliminate negative effectsCompression machinesGas cycle refrigeration machinesPulse tube refrigeratorEngineering
Owner:ZHEJIANG UNIV
Immersion oil processing apparatus for power transmission of single-point mooring system
InactiveCN105576536AMeet pressure requirementsSolve wear resistance requirementsFiltration circuitsSwitchgearOil processingGranularity
The invention provides an immersion oil processing apparatus for power transmission of a single-point mooring system. The apparatus comprises an oil inlet valve for controlling oil to flow out of an oil chamber; an online monitoring device for the monitoring micro-water, chromatogram and granularity of the oil in a pipeline; a water removal filter for filtering seawater in the oil; a self-cooling radiator for performing heat dissipation and cooling on the oil in the pipeline; a particle removal high-efficiency filter for filtering metal grindings carried by oil blocks aggregated in the pipeline and oil circulation; a motor for controlling an oil pump to realize cyclic flow of the oil in a whole work system; and oil outlet valve for controlling the oil to flow into the oil chamber from the circulating pipeline. The apparatus provided by the invention ensures high voltage withstanding and breakdown resisting performance, high corrosion resisting performance and high safety performance of the single-point mooring system.
Owner:CHINA SHIPBUILDING IND HAIBOWEI JIANGSU TECH DEV
Modular medium-voltage waveform generator loss equalization control method and system
ActiveCN112510966AUniform lossLoss loss levelingAc-dc conversionElectric power transfer ac networkCapacitanceCapacitor voltage
The invention discloses a modular medium-voltage waveform generator loss equalization control method and system. The method comprises the steps: taking each bridge arm of a modular medium-voltage waveform generator as a control target, building a model prediction control evaluation function comprising input, output and internal control variables, taking the optimal tracking performance as a control target, and selecting the optimal level number of each bridge arm; and for each full-bridge sub-module in one bridge arm, when a switching signal is configured, configuring the switching state of apower switching device in a balanced manner by taking equal action times of a left bridge arm and a right bridge arm of the sub-module as a target, so that on the premise of ensuring accurate trackingof input current, output current and internal circulation and sub-module capacitor voltage balance control, the effect of balanced distribution of internal losses of the modular medium-voltage waveform generator is achieved, and the operation reliability of the modular medium-voltage waveform generator is improved.
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Data extraction method and device, electronic equipment and storage medium
PendingCN114490715ATo achieve the extraction effectFix running stability issuesDigital data information retrievalInterprogram communicationEngineeringData query
The invention discloses a data extraction method and device, electronic equipment and a storage medium, and the method comprises the steps: receiving at least one data query instruction, and sending the at least one data query instruction to a message queue corresponding to a target database; when it is detected that a data query condition is met, sending each data query instruction in the message queue to the target database so as to call target data corresponding to the data query instruction from the target database; and receiving target data corresponding to each data query instruction. The problems that the operation stability of the service system is affected and data leakage exists during data extraction are solved, and the effect of extracting the data on the premise that the operation state of the target service system is not affected and the data is protected from being leaked is achieved.
Owner:AGRICULTURAL BANK OF CHINA
Technical water supply system of large unit
PendingCN111411660AReduce capacityReduce shockService pipe systemsWater mainsTransformerElectrical and Electronics engineering
The invention relates to a technical water supply system of a large unit, and is applicable to the field of water conservancy and hydropower engineering. The purpose of is to provide the technical water supply system of the large unit to ensure the reliability and safety and the operational flexibility of the large unit and generating equipment of the large units. According to the technical scheme, the technical water supply system of the large unit is characterized in that corresponding units and main transformers are separately provided with unit water supply systems and main transformer water supply systems; the unit water supply systems of the adjacent units communicate by unit contact water supply main pipes, and the unit contact water supply main pipes communicate with unit electricvalves; and the main transformer water supply system of the adjacent main transformers communicate by main transformer contact water supply main pipes, and the main transformer contact water supply main pipes communicate with main transformer electric valves.
Owner:POWERCHINA HUADONG ENG COPORATION LTD
Disc-type motor
ActiveCN111224474AFix running stability issuesSolve the running accuracyAssociation with control/drive circuitsWindingsElectric machineClassical mechanics
The invention discloses a disc-type motor, and the motor comprises a stator, a rotor, a position sensor and a control circuit. The stator comprises winding units, and the winding units are arranged between the stator and the rotor, wherein the number of the winding units is 3N, every three adjacent winding units form a three-phase winding, and N is a natural number greater than or equal to 1; theposition sensor is opposite to the rotor, and the position sensor is used for detecting the rotating speed and the suspension height of the rotor; the control circuit is electrically connected with the winding units and the position sensor, and the control circuit is used for receiving a detection result of the position sensor and controlling the rotating speed and the suspension height of the rotor through the winding units. According to the scheme, the operating state of the rotor is monitored in real time through the position sensor, so the operating state of the rotor is adjusted in time by the control circuit, and the problems of low operating stability and low accuracy of the conventional disc type motor are solved.
Owner:SHENZHEN CORE MEDICAL TECH CO LTD
Inner axle box bogie adopting novel flexible framework and permanent magnet direct drive motor
The invention discloses an inner axle box bogie adopting a novel flexible framework and a permanent magnet direct drive motor, the framework is generally H-shaped and consists of two T-shaped beams and two sets of slewing bearings for connecting the two T-shaped beams, only the degree of freedom of transverse rotation is released, and meanwhile, the two T-shaped beams are in approximately rigid connection in other directions; by means of the characteristic, the axle box suspension device can adopt a splayed rubber pad which can meet reasonable horizontal positioning and large vertical suspension rigidity between the wheel pair and the framework and is compact in structure and economical in cost, and bearings are arranged on the inner sides of the two side beams, so that the bogie is simple in structure and low in cost. And the purpose of light weight is achieved. The driving device is directly driven by a permanent magnet synchronous motor and is mounted on the left and right inner axle box bodies, a motor shaft suspension and direct drive mode is adopted, a gearbox structure can be avoided, the structure is simple, the axle distance of the bogie can be obviously reduced, and the self weight of the bogie can be reduced.
Owner:SOUTHWEST JIAOTONG UNIV
Lighting fixture and lighting fixture control method
ActiveCN108337794BAvoid mistakesStable working conditionElectrical apparatusSemiconductor lamp usageControl engineeringHome appliance
Owner:PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
Rope supporting wheel for endless rope continuous traction winch and using method
ActiveCN113511603AImprove stabilityFix running stability issuesWinding mechanismsVibration suppression adjustmentsControl theoryWinch
The invention discloses a rope supporting wheel for an endless rope continuous traction winch. The rope supporting wheel comprises a rope supporting wheel body, and a support used in cooperation with the rope supporting wheel body. A bottom plate is arranged at the bottom of the support, vertical plates are fixedly connected to the front side and the rear side of the top of the bottom plate, and winding wheels are movably connected to the inner sides of the vertical plates. In the moving process, a supporting rod is extruded so that the supporting rod can rotate with a pin shaft in the connecting block as the axis, and the supporting rod is pulled by an elastic pulling rope and pushes the rope supporting wheel body to ascend when the rope supporting wheel body is separated from extrusion; the vibration borne by the rope supporting wheel body is counteracted through deformation force generated when the rope supporting wheel body is extruded and vibrated, so that the effect of improving the overall stability of the rope supporting wheel body is achieved, and the problems that an existing rope supporting wheel which is buffered through a tension spring is poor in vibration reduction performance and generally needs to be in sliding connection with a mounting frame, and the operation stability of the rope supporting wheel is seriously influenced are solved.
Owner:宿州捷特矿业机械设备制造有限公司
An oil immersion treatment device for single point mooring system power transmission
InactiveCN105576536BMeet pressure requirementsSolve wear resistance requirementsFiltration circuitsSwitchgearOil processingGranularity
Owner:CHINA SHIPBUILDING IND HAIBOWEI JIANGSU TECH DEV
Construction engineering digital twinning system based on distributed technology
PendingCN112700229ASolve invisibleResolve interferenceGeometric CADDatabase distribution/replicationInternet communicationData acquisition
The invention relates to a construction progress management system, in particular to a construction engineering digital twinning system based on a distributed technology, and belongs to the field of construction control and progress management. The system comprises a digital twin platform and a data acquisition system, which are in communication connection through the Internet. The data collection system comprises a plurality of distributed data collectors, a transmission repeater cluster and a data collection server cluster which are in communication connection in sequence. The digital twinning platform comprises a platform server cluster and a display screen used for displaying data. The data acquisition server cluster is in communication connection with the Internet, and the platform server cluster is in communication connection with the Internet. According to the invention, fine management of construction projects is realized, overall control of projects and summarization and collection of data are further realized, and finally, establishment and release of digital twinborn bodies of buildings in the construction process are realized.
Owner:河北建设集团天辰建筑工程有限公司
Pumping chamber of centrifugal pump
ActiveCN110107538AImprove running stabilityImprove wear resistancePump componentsPumpsPump chamberSolid particle
The invention relates to a pumping chamber of a centrifugal pump, and aims to improve the operation stability and wear resistance of the centrifugal pump. The pumping chamber comprises a pumping chamber shell (1), a pumping chamber outlet (2) and a pumping chamber partition tongue (3), wherein a groove (4) is formed in the pumping chamber along the longitudinal direction and extends along the direction from the partition tongue (3) to the pumping chamber outlet (2). The inner wall of the pumping chamber is of unequal thickness, rectangular section grooves are longitudinally formed in the innerwall of the pumping chamber, and therefore, the structure can improve flow stability of a flow field, influence the movement state of solid particles in the centrifugal pump, improve the operation stability of the pump, inhibit the abrasion of the inner wall of the pumping chamber, and prolong the service life of the centrifugal pump. The pumping chamber is suitable for the fields such as electric power pumping irrigation engineering, petrochemical industry and mine metallurgy.
Owner:LANZHOU UNIVERSITY OF TECHNOLOGY
Electric telescopic step for platform
PendingCN114013373AIncrease resistanceHigh strengthSteps arrangementDistance detectionStructural engineering
The invention discloses an electric telescopic step for a platform. A guide rail is fixedly connected to a support, a telescopic pedal is slidably connected to the guide rail, one end of a connecting rod is hinged to the support, the other end of the connecting rod is hinged to the free end of a driving unit, and the driving unit drives the telescopic pedal to slide on the support. The sensor and the safety contact belt are both installed at the front end of the telescopic pedal, and the sensor is arranged on the rear side of the safety contact belt. Distance detection and anti-pinch functions are adopted, and the telescopic resistance and strength of the pedal are optimized, so that the electric telescopic step is stable in operation and high in bearing capacity. The distance detection sensor and the safety contact belt are adopted, and the problems of clearance elimination and clamping prevention when the step extends out and collides with a vehicle body are solved.
Owner:IVY MACHINERY NANJING
Electric drive fan shafting reforming system
PendingCN110107517ASave economic wealthThrottling loss recoveryPump componentsPump installationsElectricityPower station
The invention relates to an electric drive fan shafting reforming system, and relates to the field of industrial steam supplying and energy conservation in thermal power plants. The electric drive fanshafting reforming system aims to solve the problem of high-quality energy waste caused by large throttling loss produced in the process of temperature reduction and pressure reduction of steam. According to the electric drive fan shafting reforming system, on the basis of an original electromotor and a primary fan, a variable speed clutch and a rear back press are additionally arranged, an original drive mode which can only be driven by the electromotor is changed, and thus gas generated by the steam in the process of temperature reduction and pressure reduction can be used as a power sourceof the primary fan, the electric drive fan shafting reforming system is mainly used for driving fans in industry, and meanwhile, the high-quality energy lost by the large throttling loss in the process of temperature reduction and pressure reduction of the steam is recovered and utilized.
Owner:HARBIN GUANGHAN POWER TRANSMISSION +1
Expander Refrigeration Low Temperature Cooling Nano Particle Jet MQL Supply System
ActiveCN106584279BImprove surface integrityImprove machining accuracyLiquid spraying apparatusGrinding/polishing safety devicesCold airJet flow
Owner:QINGDAO TECHNOLOGICAL UNIVERSITY
Centrifugal pump pressure water chamber
ActiveCN110107538BImprove running stabilityImprove wear resistancePump componentsPumpsThermodynamicsPump chamber
The invention relates to a pumping chamber of a centrifugal pump, and aims to improve the operation stability and wear resistance of the centrifugal pump. The pumping chamber comprises a pumping chamber shell (1), a pumping chamber outlet (2) and a pumping chamber partition tongue (3), wherein a groove (4) is formed in the pumping chamber along the longitudinal direction and extends along the direction from the partition tongue (3) to the pumping chamber outlet (2). The inner wall of the pumping chamber is of unequal thickness, rectangular section grooves are longitudinally formed in the innerwall of the pumping chamber, and therefore, the structure can improve flow stability of a flow field, influence the movement state of solid particles in the centrifugal pump, improve the operation stability of the pump, inhibit the abrasion of the inner wall of the pumping chamber, and prolong the service life of the centrifugal pump. The pumping chamber is suitable for the fields such as electric power pumping irrigation engineering, petrochemical industry and mine metallurgy.
Owner:LANZHOU UNIVERSITY OF TECHNOLOGY
Automatic testing device for insulation performance of power transmission line
ActiveCN105759182BGuaranteed timelinessAvoid unnecessary trouble caused by manual inspectionTesting dielectric strengthFault location by conductor typesElectric power transmissionElectric field sensor
The invention relates to an apparatus for automatically detecting insulating properties of an electric power transmission line. The apparatus is characterized by including an apparatus main body, a walking module, a measuring module, an outer expansion module, a secondary opening module, a power supply module, a control module and a wireless communication module. The control module, the power supply module, and the wireless communication module are mounted inside the apparatus main body. The power supply module and the other modules are connected so as to supply power to the other modules. The control module is connected to the walking module, the measuring module, the outer expansion module, the secondary opening module, and the wireless communication module so as to realize detection control function. According to the invention, the apparatus main body is moving on the electric power transmission line, and a temperature sensor and an electric field sensor are used individually for collecting temperature values and electric field intensity values at different positions of the electric power transmission line, and malfunction points are determined by the temperature values and the electric field intensity values in combination with a counter on a drive wheel. The apparatus of the invention guarantees timeliness of detection of the insulating properties of the electric power transmission line, effectively prevents unnecessary trouble brought by current method of artificial detection, and substantially increases detection efficiency.
Owner:HEBEI UNIV OF TECH
Air energy injection enthalpy-increasing ultra-low temperature cascade dryer
PendingCN110849135AImprove efficiency ratioImprove economyMechanical apparatusDrying gas arrangementsIntermediate heat exchangerEngineering
The invention relates to an air energy injection enthalpy-increasing ultra-low temperature cascade dryer comprising a first circulating system and a second circulating system. The first circulating system is a refrigeration system, and the second circulating system is a heating system; refrigerant gas evaporating in the first circulating system exchanges heat with liquid refrigerants condensing in the second circulating system, so that the refrigerant gas provides heat to the second circulating system through an intermediate heat exchanger via a compressor after heat in air is absorbed through evaporation in the first circulating system; the first circulating system and the second circulating system are connected through the intermediate heat exchanger, and the refrigerant gas evaporatingin the first circulating system exchanges heat with the liquid refrigerants condensing in the second circulating system, so that the refrigerant gas evaporating in the circulating system provides heat to the second circulating system; and the first circulating system is provided with an auxiliary enthalpy-increasing system which comprises an enthalpy-increasing valve and an enthalpy-increasing electronic expansion valve, and the enthalpy-increasing valve and the enthalpy-increasing electronic expansion valve are installed on the first circulating system through auxiliary pipelines. Accordingto the air energy injection enthalpy-increasing ultra-low temperature cascade dryer, the problem of the operation stability of an air source heat pump at a severe cold area is solved effectively; andthe dryer has the advantages of high efficiency, energy saving, emission reduction, safety and reliability, long service life, simple operation and the like.
Owner:东莞市天元节能科技有限公司
Expander Driven Refrigeration Low Temperature Cooling Nanoparticle Jet MQL Supply System
ActiveCN106514495BImprove surface qualityImprove cooling effectLiquid spraying apparatusGrinding/polishing safety devicesReduction driveLubrication
Owner:QINGDAO TECHNOLOGICAL UNIVERSITY
Modular Medium Voltage Waveform Generator Loss Leveling Control Method and System
ActiveCN112510966BUniform lossLoss loss levelingAc-dc conversionElectric power transfer ac networkCapacitanceCapacitor voltage
The invention discloses a loss equalization control method and system of a modularized medium-voltage waveform generator. Each bridge arm of the modularized medium-voltage waveform generator is used as a control target, and a model prediction including input, output and internal control variables is established. Control the evaluation function, with the optimal tracking performance as the control target, select the optimal level number of each bridge arm; for each full-bridge sub-module in a bridge arm, when configuring the switch signal, use the left bridge of the sub-module The goal is to equalize the number of actions of the right bridge arm and the right bridge arm, and balance the switching states of the power switching devices to achieve a modularized medium voltage under the premise of ensuring accurate tracking of the input current, output current, internal circulation current and sub-module capacitor voltage balance control. The effect of balanced distribution of losses inside the waveform generator improves the operational reliability of the modular medium voltage waveform generator.
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Method and device for determining time sequence parameter of input/output bus
InactiveCN101520765BAvoid time-wasting problemsFix running stability issuesElectric digital data processingSingle plateComputer science
Owner:HUAWEI TECH CO LTD
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