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41results about How to "Prevent overhaul" patented technology
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System for remotely monitoring energy consumption of central air-conditioning
InactiveCN102063078APrevent overhaulSafe and stable operationSpace heating and ventilation safety systemsLighting and heating apparatusReal-time dataData acquisition
The invention discloses a system for remotely monitoring energy consumption of a central air-conditioning, which comprises a data acquisition terminal, an on-site work station and a data processing center. The data acquisition terminal is used for acquiring on-site data according to a preset sampling period, wherein the on-site data comprises central air-conditioning energy consumption parameters, environmental parameters and equipment operating parameters; the on-site work station is used for receiving the on-site data transmitted by the data acquisition terminal, and identifying, encrypting, packaging and transmitting the on-site data; and the data processing center is used for receiving the identified, encrypted and packaged on-site data which is transmitted by the on-site work station, and storing, managing and analyzing the on-site data. The on-site data is analyzed and processed by the data processing center, the central air-conditioning operating state can be monitored on line, real-time fault alarm is provided, and long-term safe operation of the system is guaranteed. The central air-conditioning energy consumption data is stored and managed for a long time, and the energy consumption rule is analyzed for a user by means of real-time data monitoring and other technical means; therefore, the energy-saving benefit is kept for a long time and even continuously increased.
Owner:SHENZHEN DAS INTELLITECH CO LTD
Device for reinforcement, energy dissipation and seismic mitigation of tenon and mortise joint of timber structure
ActiveCN103422576AGood carrying capacityEasy to repair and replaceShock proofingFastenerLarge earthquakes
The invention discloses a device for reinforcement, energy dissipation and seismic mitigation of a tenon and mortise joint of a timber structure. The device for reinforcement, energy dissipation and seismic mitigation of the tenon and mortise joint of the timber structure comprises a wood beam, a wood pole, the tenon and mortise joint, embedded steel bars, joint connecting pieces and joint fastening pieces, wherein the wood beam is connected with the wood pole through the tenon and mortise joint, conduits are formed in the upper end surface and the lower end surface of the wood beam or in the two lateral surfaces of the wood beam respectively, the embedded steel bars are embedded in the conduits in advance, the conduits are sealed through small battens and special structural adhesive, one end of each joint connecting piece is connected with a corresponding embedded steel bar, the other end of each joint connecting piece is connected with a corresponding joint fastening piece, and the joint fastening pieces penetrate through the pole body of the wood pole and are fixed on the side, back on to the wood beam, of the wood pole through anchor plates and cushion blocks. The device for reinforcement, energy dissipation and seismic mitigation of the tenon and mortise joint of the timber structure is high in bending resistance, energy-dissipation capacity and ductility, and capable of guaranteeing stability of the structure under the small earthquake condition, achieving serious deformation under the large earthquake condition to control structural damage, and achieving automatic restoration of the structure after an earthquake.
Owner:NANJING UNIV OF TECH
Valve remote fault diagnosis system based on IOT (Internet of Things) technology
ActiveCN105759786ATimely analysisGuaranteed operational safetyElectric testing/monitoringThe InternetEngineering
The invention discloses a valve remote fault diagnosis system based on the IOT (Internet of Things) technology. An intelligent valve terminal communicates with main control equipment through a zigbee network, and the main control equipment communicates with a remote monitoring platform through the Internet. The intelligent valve terminal comprises a sensor module, a data collection module for collecting a sensor signal, and a zigbee module for sending the signal. The main control equipment comprises a zigbee module for receiving a zigbee network signal, and a GPRS module for transmitting the signal. The remote monitoring platform comprises a database module, a real-time display module for the real-time display of the data, and an alarm module. The sensor module comprises a pressure transmitter, a valve rod position sensor, a temperature transmitter, a VOCs sensor, and a valve rod torque sensor. The system is low in cost, is high in practicality, and is high in efficiency.
Owner:JIANGSU SHENTONG VALVE
Wind power plant equipment state evaluation and maintenance decision support detection method and system
InactiveCN108491990AMonitor running statusOptimizing maintenance test itemsResourcesDecision systemCharge detection
The invention provides a wind power plant equipment state evaluation and maintenance decision support detection method. The method comprises the steps of (1) collecting and analyzing information whichcomprises technical data related to equipment patrol records, fault statistics and equipment running conditions; (2) performing charged detection: effectively monitoring a running state of wind powerplant equipment through the data collected by an instrument, and performing fault detection and prevention; (3) implementing state maintenance of a decision making system: by collecting and analyzingrunning data of the equipment, carrying out state evaluation work on the equipment to determine whether the equipment needs to be maintained or not and maintenance items; and (4) establishing an equipment pre-test maintenance optimization scheme: by implementing the state maintenance of the wind power plant equipment and the charged detection of the equipment, performing state evaluation on the equipment according to wind power plant equipment state evaluation rules, and customizing a maintenance policy. The invention furthermore discloses a corresponding detection system. The maintenance test cycle is prolonged, and maintenance test items are optimized, so that the maintenance test expense is reduced, excessive maintenance and lacking maintenance of the equipment are prevented, and the equipment stability is further improved.
Owner:BEIJING TIANRUN NEW ENERGY INVESTMENT CO LTD
State test method and system of wind power plant equipment live detection
InactiveCN108414898AMonitor running statusOptimizing maintenance test itemsOptically investigating flaws/contaminationTesting using acoustic measurementsDecision systemUltraviolet
The invention provides the state test method of wind power plant equipment live detection. The method comprises the following steps of (1) carrying out live detection: using an apparatus to collect data, implementing the live detection combining ultrasonic partial discharge detection and ultraviolet imaging detection, monitoring the operation state of wind power plant equipment, and carrying out fault detection and prevention; (2) constructing decision system state overhauling: collecting and analyzing the operation data of the equipment, and carrying out state evaluation work on the equipmentso as to determine whether the equipment needs overhauling and determine overhauling items; (3) establishing an equipment pre-test overhauling optimization scheme: through wind power plant equipmentstate overhauling, combining the implementation of equipment live detection, according to a power plant equipment state evaluation rule, carrying out state evaluation on the equipment, and making a customized overhauling strategy. The invention also discloses a corresponding detection system. A live detection method combining the ultrasonic partial discharge detection and the ultraviolet imaging detection is adopted, a test project is optimized and pre-test overhauling cost is saved.
Owner:BEIJING TIANRUN NEW ENERGY INVESTMENT CO LTD
Self-rearranging mortise and tenon joint
InactiveCN103422682AWon't breakStable structureBuilding repairsBuilding reinforcementsMortise and tenonEngineering
The invention discloses a self-rearranging mortise and tenon joint which comprises a wooden beam, a wooden column, a mortise and tenon joint body between the beam and the column and a prestress rib. The wooden beam and the wooden column are connected through the mortise and tenon joint body. The prestress rib penetrates through the wooden beam and the wooden column in the longitudinal direction of the wooden beam. The end portion of the prestress rib is fixed on one side, with the back toward the wooden beam, of the wooden column through an anchor plate, an anchor pad plate and an anchor. The self-rearranging mortise and tenon joint has the ideal advantages that strong bending-resistant capacity and energy-consuming-resistant capacity are achieved, the joint can guarantee structure stability under low quake, structure deforms greatly and structure damage is controlled under high quake, and structure self-rearranging effect is achieved after quake.
Owner:NANJING UNIV OF TECH
Sand protection matching pipe string for high-throughput sand filter pipe
ActiveCN103470229AIncrease the effective oil passing areaOvercoming the drawbacks of clogging and reducing oil production efficiencyDrilling rodsFluid removalHigh fluxCoupling
The invention relates to a sand protection matching pipe string for a high-throughput sand filter pipe. The sand protection matching pie string comprises a packer, a conversion coupling, a high-throughput sand filter pipe and a time delay self-locking valve or plug, wherein the conversion coupling is connected with the packer and is arranged at the back end of the high-throughput sand filter pipe, and the time delay self-locking valve or plug is arranged at the front end of the high-throughput sand filter pipe; high-throughput sand filter units are sequentially connected by a double-male left-hand coupling end to end to form the high-throughput sand filter pipe, and a high-temperature resistant broken centralizer is arranged on the outer surface of the middle of the double-male left-hand coupling; and a broken bracket is arranged between the high-temperature resistant broken centralizer arranged on the outer surface of the double-male left-hand coupling and the high-throughput sand filter unit. The high-temperature resistant broken centralizer can ensure that the high-throughput sand filter pipe is positioned at the center of a shaft, so that formation fluid evenly supplies fluid to a sand filter from the shaft, and meanwhile, the wear of the shaft to the sand filter in the logging process is reduced, the success rate of logging is ensured, the breaking is easy, and the replacement operation is not affected.
Owner:SHANDONG UNIV +1
Self-resetting three-way limiting rubber support
InactiveCN109577178ALimit horizontal relative displacementLimit relative displacementBridge structural detailsShape-memory alloyAlloy
The invention relates to a self-resetting three-way limiting rubber support which comprises an upper support plate (3), a lower support plate (14), rubber laminated layers and shape memory alloy stranded wires (8), wherein the rubber laminated layers are placed between the upper support plate (3) and the lower support plate (14), the shape memory alloy stranded wires (8) are arranged around the rubber laminated layers, and the two ends of the shape memory alloy stranded wires (8) are connected with the upper support plate (3) and the lower support plate (14). Compared with the prior art, the self-resetting three-way limiting rubber support has great shock absorption and limiting capacity under the effect of horizontal and vertical earthquakes, falling-off damage of bridges is prevented, meanwhile, self-resetting of the bridges during earthquakes can be accelerated, in addition, the energy-dissipating capacity is achieved, damage of piers is reduced to the greatest extent, and the restorability of the bridges is improved.
Owner:TONGJI UNIV
Enterprise energy efficiency management system and management and control method therefor
InactiveCN106125702AAchieve normal operationImprove operating conditionsEnergy industryTechnology managementInformation processingCommand system
The invention discloses an enterprise energy efficiency management system and a management and control method therefor, and belongs to the field of energy management. The system comprises an information collection unit, an information processing unit, a control unit, and an operation unit. The information collection unit, the information processing unit, the control unit and the operation unit are sequentially connected. The information collection unit comprises an information automatic collection module and a communication module, wherein the information automatic collection module is connected with a computer DCS system of the operation unit through the communication unit. The information processing unit comprises a data calculation module, a data comparison module and a data analysis module. The control unit comprises a factory-level scheduling command system module, a production plan cost check module, an equipment energy consumption economical efficiency diagnosis module and an equipment state diagnosis module. The system can find hidden or exposed various problems, which affect the high-efficiency utilization of energy sources, at the links of enterprise resource production, conveying, transfer, distribution and consumption in a thermodynamic system, can carry out the diagnosis and analysis of the problems and provides processing suggestions.
Owner:BENGANG STEEL PLATES
Time sequence optimization method based on dummy
ActiveCN113177380AThe principle is simpleLow costInternal combustion piston enginesComputer aided designStatic timing analysisRepair time
The invention discloses a time sequence optimization method based on dummy. The time sequence optimization method comprises the following steps: S1, constructing a dummy library; S2, analyzing a physical design time sequence, and preparing data for formulating a proper repair strategy; S3, processing the data in the step S2, classifying time sequence violations, and dividing the time sequence violations into data paths and clock paths according to different repair paths; wherein the data path can be used for repairing hold time violation, and the clock path can be used for repairing setup time and hold time violation; S4, repairing the data path by inserting the dummy; S5, repairing the clock path by inserting the dummy; and S6, performing static time sequence STA analysis again, and completing time sequence violation repairing. The method has the advantages of being simple in principle, low in implementation cost, capable of rapidly and accurately repairing time sequence violation and the like.
Owner:PHYTIUM TECH CO LTD
Power equipment maintenance system and method based on artificial intelligence
ActiveCN114781657ATimely investigationAvoid OverhaulForecastingResourcesControl engineeringElectric power equipment
The invention discloses a power equipment maintenance system and method based on artificial intelligence, and belongs to the field of deep learning. The method comprises the steps of collecting the material of the power equipment, calculating the fault rate of the power equipment, carrying out initial scoring on the power equipment according to the fault rate of the power equipment, outputting a power equipment evaluation value, evaluating the operation state of the power equipment, and evaluating the operation state of the power equipment according to the power equipment evaluation value and the operation environment of the power equipment. Adjusting the maintenance cycle of the power equipment according to the operation state of the power equipment; according to the method, the operation state of the power equipment is evaluated from two aspects of the probability of possible faults of the power equipment and the influence of the operation environment of the power equipment on the power equipment, the maintenance period of the power equipment is adjusted according to the operation state of the power equipment, and the maintenance period is reasonably configured; the method can timely check the power equipment which is liable to have fault hidden troubles, nip in the bud, avoid overhauls and blind maintenance, and reasonably distribute maintenance resources.
Owner:江苏贺鸿电子有限公司
Using method for sand aeration type safety joint under petroleum well
ActiveCN107642341ASolve the problem of sand burialPrevent overhaulDrilling rodsVibration devicesUpper jointType safety
The invention relates to a using method for a sand aeration type safety joint under a petroleum well. According to the technical scheme, the safety joint comprises an upper joint and a lower joint, the lower joint is connected to the lower portion of the upper joint, the outer side of the upper joint is sleeved with a sealing steel bush, a shear ring is arranged between the sealed steel bush and the upper portion of the upper joint, a safety shear pin is arranged on the upper portion of the shear ring, a sealing piston is arranged between the sealing steel bush and the lower portion of the upper joint, and connected with the lower portion of the upper joint through a left-hand thread, an impact cavity is formed between the shear ring and the sealing piston, and a sand aeration hole is formed in the lower portion of the sealing steel bush. The using method has the advantages that the problem of sand blocking can be solved, a tubular pile can be safely lifted out, heavy repair can be avoided for the petroleum well, a sand-prevention tube can be directly pulled out under variable conditions, the problem that under most conditions, the sand-prevention tube is taken out in a segmented mode is solved, operation is easy, and time and labor are saved.
Owner:西安嘉和瑞诚实业有限公司
Sand-loosening type petroleum downhole safety connector
ActiveCN107558933ASolve the problem of sand burialPrevent overhaulDrilling rodsVibration devicesPetroleumOil well
The invention relates to a sand-loosening type petroleum downhole safety connector. According to the technical scheme, the sand-loosening type petroleum downhole safety connector comprises an upper connector and a lower connector, the lower connector is connected on the lower portion of the upper connector, and the outer side of the upper connector is sleeved with a sealing steel sleeve; a shearing ring is arranged between the upper portions of the sealing steel sleeve and the upper connector, a safety shearing nail is arranged on the upper portion of the shearing ring, and a sealing piston isarranged between the lower portions of the sealing steel sleeve and the upper connector; and the lower portions of the sealing piston and the upper connector are connected through a reversed buckle,an impact cavity is formed between the shearing ring and the sealing piston, and a sand-loosening hole is formed in the lower portion of the sealing steel sleeve. The sand-loosening type petroleum downhole safety connector has the beneficial effects that sand jam is solved, a pipe column can be safely pulled out, oil well overhauling is prevented, a sand control pipe can be directly pulled out invarious situations, the problem that most sand control pipes are taken out in sections at present is solved, operation is simple, and time saving and labor saving are achieved.
Owner:东营市科创石油装备有限公司
Maintenance decision-making method based on power generation equipment operation state comprehensive evaluation model
InactiveCN110826733AImprove accuracyRespond accuratelyData processing applicationsMachine learningSignal characteristicCharacteristic space
The invention discloses a maintenance decision-making method based on a power generation equipment operation state comprehensive evaluation model. Power generation equipment status is included, wherein the power generation equipment status comprises n mutually independent characteristic quantity values x1(t), x2(t),..., xn(t)representing the power generation equipment status respectively; x1(t), x2(t),..., xn(t) come from the same object, so that the x1(t), x2(t),..., xn(t) are considered as a whole to form an m-dimensional vector which is called as a status feature vector of the equipment, and an n-dimensional space formed by all possible values of the state feature vector x at the moment t is called as a state feature space. The invention discloses a maintenance decision-making method based on a power generation equipment operation state comprehensive evaluation model. The deterioration degree of comprehensive characteristic parameters representing the equipment status is used for representing the health condition of the equipment, the comprehensive characteristic parameters comprise vibration time threshold signal characteristics, vibration frequency spectrum characteristics andvibration change trend characteristics, and the accuracy of describing the health condition of the equipment can be effectively improved through the method.
Owner:HUADIAN ZOUXIAN POWER GENERATION CO LTD
DP-MPSO algorithm based weekly repair plan compiling and optimizing method for power dispatching
InactiveCN105913158ACentralized lean decision-makingPrevent overhaulForecastingInformation technology support systemWork periodProgram planning
The invention provides a DP-MPSO algorithm based weekly repair plan compiling and optimizing method for power dispatching, which is characterized by and comprises the following steps: simplifying a power grid equipment repair model into a power charging and loading two-end model; performing a constraint processing to the power grid equipment repair model; breaking down and transforming the problem of repair plan compiling into the problem of an optimized combining of single day superposed load and the installed capacity balance across the power grid; formulating a peak value optimizing and sequencing strategy; converting into a 0 / 1 knapsack problem and through the DP-MPSO algorithm, obtaining the most optimized solution to the peak value; dating back all optimized results of the peak value; inspecting a cross-work period repair ticket optimized set and determining if the acceptance or rejection results of one single cross-work period repair ticket are consistent or not in different work periods. With the method provided by the invention, the goals of repair compiling are concentrated and refined. Being intelligent and high efficient, the plan compiling is added by a DP-MPSO algorithm in the optimization process with the consequence of an improved calculating efficiency.
Owner:STATE GRID CORP OF CHINA +3
Sand-loosing-type oil downhole safety joint
InactiveCN109854186ASolve the problem of sand burialPrevent overhaulDrilling rodsDrilling casingsUpper jointPetroleum
Owner:于志浩
Sealing device of casing pipe suspension device
InactiveCN106089142ATo achieve the purpose of space sealingTo achieve the purpose of sealingSealing/packingEngineeringUltimate tensile strength
The invention discloses a sealing device of a casing pipe suspension device. The sealing device is arranged between a casing pipe head and a casing pipe body and located above the casing pipe suspension device. The sealing device comprises an annular fixing piece (1). An outer sealing ring (2) is arranged on the outer wall of the annular fixing piece in a sleeving mode, and the outer wall of the annular fixing piece makes contact with the outer wall of the casing pipe head through the outer sealing ring (2). An inner sealing ring (3) is arranged on the inner wall of the annular fixing piece, and the inner wall of the annular fixing piece makes contact with the inner wall of the casing pipe body through the inner sealing ring (3). Sealing of the casing pipe body and the casing pipe head is achieved through the inner sealing ring and the outer sealing ring of the annular fixing piece. By means of the sealing device of the casing pipe suspension device, the purpose that the upper space of the suspension device is sealed can be achieved, and the effect that a flange primary seal passes the pressure test during later operation is ensured; and the well-killing operation and wellhead flame operation links are reduced, the labor intensity is relieved, the labor cost is reduced, the production limitation period is prolonged, and the safety coefficient is increased.
Owner:CHINA PETROLEUM & CHEM CORP
Large-span steel structure roof transformation method
PendingCN112267706AReduce loadAvoid it happening againBuilding repairsSafety netArchitectural engineering
The invention provides a large-span steel structure roof transformation method. The method is used for transforming an original roof of a large-span steel structure, and comprises the following stepsthat (1) a first roof plate located in the middle of the original roof is dismounted, a second roof plate located on the edge portion of the original roof and a third roof plate located between the first roof plate and the second roof plate are reserved, and the lower portion of the first roof plate is paved with a safety net and fireproof tarpaulin, so that construction safety is guaranteed; (2)an ETFE air pillow film is arranged on a first steel structure corresponding to the original position of the first roof plate; and (3) an aluminum-magnesium-manganese metal roof plate covering the third roof plate is additionally arranged in an area between the ETFE air pillow film and the second roof plate. The problem of roof leakage can be thoroughly solved; and the roof structure load can be reduced, large disassembly and large construction can be avoided, reconstruction funds can be saved, and an existing building can meet the requirements of comfort, energy conservation, environmental protection and attractiveness.
Owner:东莞市莞城建筑工程有限公司 +1
Water injection packer
InactiveCN105840132AAvoid positive suppressionPrevent overhaulFlushingSealing/packingUpper jointPositive pressure
The invention discloses a water injection packer, which belongs to the field of oil field water injection. The water injection packer includes: a central pipe, an upper joint, a piston, a connecting head, a lower joint, a shear nail seat and an anti-seating shear nail, etc. The present invention forms a backwash channel through the first water inlet hole, the second water inlet hole, the first annular space, the upper second annular space and the first water outlet hole. The sealing process and the backwashing process share one piston, and the structure is simple and the backwashing process is simple. After washing, the piston moves upwards to close the backwash channel under the action of the elastic force of the elastic member, avoiding positive pressure on the oil pipe. The operation is simple, and the connection head and the lower joint are connected by pins. When sand stuck, sand buried or sleeve deformation occurs When the water injection pipe string cannot be removed, the pin can be pulled out by lifting the upper joint, thereby pulling out the upper part of the joint head of the present invention and the upper pipe string, and only repairing part of the water injection pipe string, avoiding overhaul of the water injection pipe string .
Owner:PETROCHINA CO LTD
Using method of safety joint in loosen sand type oil well
ActiveCN109505528ASolve the problem of sand burialPrevent overhaulDrilling rodsVibration devicesUpper jointEngineering
Owner:山东华冠能源技术有限公司
Blast furnace bell-less furnace top failure diagnosis forecasting system
InactiveCN101792836BImplement fault pre-processingPrevent overhaulBell-and-hopper arrangementEngineeringBusiness forecasting
The invention relates to a blast furnace bell-less furnace top failure diagnosis forecasting system for detecting and monitoring the operation state of a furnace top distributor on line. A great amount of history data are stored in a computer database, the heated and pressed conditions in all positions of the distributor, the weighting condition of a furnace top discharging tank during distribution and the operation vibration condition of the distribution are programmed and analyzed, and the operation state of the distributor is diagnosed and analyzed for a long term so as to preprocess failures, or sum up the detection period of a gearbox, prevent over-repair or disrepair phenomena and greatly decrease the production operation cost. Moreover, the invention solves the problem that a displacement value between a large gear disc and a relatively stationary gearbox shell in a traditional sealed furnace can not be detected and output. The invention also provides a practical concrete implementation mode.
Owner:济南领航机械设备有限公司
Pipeline thermal insulation performance evaluation method
PendingCN111861271AReasonable screeningEfficient use ofResourcesManufacturing computing systemsGrey correlation analysisThermal insulation
The invention discloses a method for evaluating the heat preservation performance of a pipeline. According to the method, ten evaluation indexes are adopted, a subjective and objective comprehensive evaluation method combining an analytic hierarchy process and a grey correlation analysis method and a comprehensive multi-index evaluation method for evaluating the heat preservation performance of the pipeline are combined, the two subjective and objective evaluation methods are combined, and the method considers the importance degree of indexes, and is not divorced from objective data, and is anevaluation method combining qualitative analysis and quantitative analysis. According to the method, the pipelines urgently needing heat preservation transformation can be screened out more reasonably, an accurate basis is provided for heat preservation upgrading transformation of the pipelines, the transformation funds are efficiently utilized, and under-repair and over-repair are avoided.
Owner:CHINA PETROLEUM & CHEM CORP +1
Accessible roof transformed on basis of slope-finding roof, and construction method thereof
The invention discloses an accessible roof transformed on the basis of a slope-finding roof, and a construction method thereof. The accessible roof comprises an existing wall, an existing roof, new-built parapet walls, waterproof layers, a plurality of light steel pipes, a spring layer, a light steel plate and an accessible roof layer. One of the waterproof layers is arranged on the upper portionof the existing roof, and the spring layer is arranged on the upper portion of the waterproof layer; the multiple light steel pipes are arranged in the middle of the spring layer, regularly penetratethrough the spring layer and are distributed in the middle of the spring layer; the upper portions of the light steel pipes are connected with the light steel plate, and the lower portion of the lightsteel plate is closely attached to the spring layer; and the accessible roof layer is arranged on the upper portion of the light steel plate, and the other waterproof layer is arranged on the upper portion of the accessible roof layer. The existing slope-finding roof is transformed, thus mass-demolishing and mass-construction for transformation of an existing building are avoided, the structure is simple, construction is rapid, and normal life needs of people is not affected.
Owner:SHENYANG JIANZHU UNIVERSITY
Rotating shaft seal repairing method
PendingCN113579638ANot easy to damageAvoid Buying Wait CyclesMetal working apparatusRotational axisRepair time
The invention relates to a rotating shaft seal repairing method. The method comprises the steps of repairing material selection, pre-machining before repairing, a repairing implementation procedure and repairing post-treatment. The repairing method is simple and easy to master, a shaft neck is not prone to being damaged, and if abrasion is serious and frequent, a bearing inner ring can be replaced many times for repeated use; and the working efficiency of maintenance can be effectively improved, the maintenance time is shortened, and the maintenance cost is saved.
Owner:KUNMING YUNNEI POWER
Auxiliary overhauling method, overhauling device and overhauling system for railway vehicle
ActiveCN111907558ASave exercise timePrevent overhaulRailway signalling and safetyRailway auxillary equipmentControl engineeringReliability engineering
The invention provides an auxiliary overhauling method, an auxiliary overhauling device and an auxiliary overhauling system for a railway vehicle, and relates to the technical field of vehicle overhauling. The rail vehicle is provided with a detection system, and the detection system is used for detecting a plurality of components and outputting state parameters of all the components. The maintenance method comprises the steps: acquiring the state parameters of at least one component; searching an overhaul model corresponding to the state parameter from a preset database according to the stateparameter; obtaining maintenance parameters according to the state parameters and the maintenance model; when the maintenance parameter reaches a threshold value, sending a maintenance prompt signaland maintenance condition information; detecting the maintenance stations meeting the maintenance condition information, and sending a maintenance prompt signal and relative position information of the maintenance stations and the vehicle to the detection system. According to the auxiliary overhauling method, the auxiliary overhauling device and the auxiliary overhauling system of the railway vehicle, the overhauling resources can be saved, and the overhauling process is accelerated.
Owner:DATONG ELECTRIC LOCOMOTIVE OF NCR
Valve Remote Fault Diagnosis System Based on Internet of Things Technology
ActiveCN105759786BTimely analysisGuaranteed operational safetyElectric testing/monitoringThe InternetEngineering
Owner:JIANGSU SHENTONG VALVE
Small unsealing force packer
The invention relates to a small unsealing force packer. The small unsealing force packer comprises an upper joint, a central pipe, an upper outer pipe, a lower outer pipe, a well flushing piston seat, an upper piston, a well flushing piston sleeve, a rubber cylinder assembly, and a short joint, and the small unsealing force packer is characterized in that a one-way exhaust valve is assembled between an exhaust hole of a pressure bearing joint and the lower outer pipe, a setting piston is installed on the lower outer pipe, fixed by a setting shear pin, and unsealed to sleeve a circlip hook andlocked to a circlip hook body, an unsealed shear pin is screwed on the circlip hook for fixation, and a circlip is installed on the circlip hook. The lower part of a lower joint is connected with theshort joint by a forced unsealed shear pin, and the outer side of the lower part of the lower joint is provided with a sheath which is fixed by a sheath pin. According to the small unsealing force packer, a forced unsealing structure is arranged at the lower short joint portion; and the unsealed shear pin does not bear the rebound force of the rubber cylinder, the size of the unsealed shear pin is reduced, the strength of the unsealed shear pin is reduced, and the packer can be unsealed with very low unsealing force. After being set, the packer can be locked in one way to ensure that the packer is set tightly and reliably.
Owner:LIAONING XINHUA INSTR CO LTD
Reinforcement and energy-dissipating vibration-absorbing device for mortise and tenon joints of wooden structures
ActiveCN103422576BImprove carrying capacityImprove energy consumptionShock proofingMortise and tenonAdhesive
Owner:NANJING TECH UNIV
A Method for Evaluating Construction Effect of Measure Operation in Downhole Workover Operation
ActiveCN109083641BExtension of Advanced Standing PeriodImproving the Quality of Workover OperationsDesign optimisation/simulationResourcesEvaluation resultWater well
The invention discloses a method for evaluating construction effects of measure operations in downhole workover operations: (a) determining the evaluation index set U of measure operations; determining the evaluation set V of operation effects; determining the weight W of each evaluation index; giving the evaluation Matrix R=(R 1 , R 2 , R 3 , R 4 , R 5 , R 6 T ), R i =(r i1 ,r i2 ,r i3 ,r i4 ,r i5 ); establish a fuzzy evaluation model; calculate the evaluation index value B and normalize it; obtain the comprehensive evaluation result according to the principle of maximum membership. The purpose of the present invention is to provide a method for evaluating the construction effect of measure operations in downhole workover operations, so as to solve the above-mentioned defects in the evaluation methods for measure downhole operations in the prior art, improve the quality of workover operations, and prolong the maintenance-free period of oil and water wells. In order to keep abreast of the effects of workover operations and their influencing factors in a timely manner, the purpose of improving the quality of workover operations is to avoid unnecessary overhaul and complex operations as much as possible.
Owner:SOUTHWEST PETROLEUM UNIV
Undercarriage remaining use frequency model training method and device and computer equipment
PendingCN112149746AEasy maintenance planningPrevent overhaulCharacter and pattern recognitionFeature vectorAlgorithm
The invention discloses an undercarriage remaining use frequency model training method and device, computer equipment and a storage medium, relates to the technical field of undercarriage folding andunfolding, and is used for predicting the remaining use frequency of an aircraft undercarriage. According to the main technical scheme, the method comprises the following steps: acquiring time serieshistorical sample data of folding or unfolding time of an aircraft landing gear; extracting a sample length feature, a sample degradation rate feature, a sample differential degradation rate feature and a sample relative degradation rate feature of the undercarriage from the historical sample, and the number of remaining use times of the sample of the undercarriage; forming a feature vector by thesample length feature, the sample degradation rate feature, the sample differential degradation rate feature and the sample relative degradation rate feature of the undercarriage, and determining theremaining use frequency of the undercarriage as a label; and training a model according to the feature vector and the label to obtain an undercarriage remaining use frequency model.
Owner:BEIJING AERONAUTIC SCI & TECH RES INST OF COMAC +1
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