193results about How to "Achieve maintenance-free" patented technology

The invention discloses a zoned and layered load transferring method based on urban power transmission network fault recovery. The method comprises the steps of: based on integrated power grid model and operation mode information of an EMS (energy management system), receiving power grid fault information in real time; and based on spare power automatic switching action condition, automatically analyzing off-limit equipment and power failure range information of a power grid after a fault, and providing an operation mode adjusting strategy for eliminating limit exceeding of the equipment. A local rapid topological method is utilized, the zoned and layered recovery strategy is adopted, and a power supply recovery scheme is automatically generated, so that the system operation personnel are assisted in processing emergent accidents, the power failure time is effectively shortened, the problems of long fault recovery period and large pressure in the prior art are solved, and the power supply reliability of a regional power grid is further improved.

The invention aims to provide a fuel filter integrating an automatic water drain valve, so as to solve the problem of inconvenient water drainage of an existing fuel filter. The fuel filter integrating the automatic water drain value aiming to achieve the purpose comprises a filter element and a water collection container which is arranged below the filter element, and is characterized by consisting of an electromagnetic valve, a controller and a water sensing unit; the electromagnetic valve is arranged in an outfall at the bottom of the water collection container; the water sensing unit detects a water signal; the water signal is transmitted to the controller; and the controller controls a current signal to the electromagnetic valve according to the water signal, so as to start the electromagnetic valve.

The invention consists of a data intelligence collection unit, an enterprise monitoring unit, a data service unit, an enterprise diagnosis unit, a diagnosis center unit, an analysis method unit, an expert consultation service unit and a resource login and authentication unit. The invention can implement remote monitoring and diagnosing for mechanical failure, each subfunction of the monitoring and diagnosing system is distributed independently in network, constitutes flexible resource. The each resource unit can be maintained, renewed, updated by technical development institute, through recombining and dispatching relevant resource unit to implement resolution for complex problem. Each technical resource and expert resource can be shared, integrated and utilized in the network layer.

The method includes analyzing customer's historical data, building model for scoring customer's credit, scoring customer's credit based on model. The system includes server, interface of banking business system and foreground terminals. Based on browser, foreground terminals can launch request of credit calculation to server locally or remotely as well as display result. The server stores scoring model, and based on request from foreground terminal, the server calculates customer's score of credit. Based on given customer's code, the interface of banking business system communicates with the banking business system, reading out customer's information for server to calculate. Comparing with prior art, the invented system is scientific, objective as well as fair and square. The system provides features of simple operation, use in local and remote, no need of maintaining foreground terminals, shared data among banking business systems.

The invention relates to a capacitor-battery bipolar inline combined nickel-hydrogen power capacitor battery which comprises a positive plate and a negative plate. The battery is characterized in that the negative plate is manufactured by coating negative mixed size on a foamed nickel frame, drying, grinding and cutting; and the positive plate is manufactured by coating positive mixed size on a foamed nickel substrate, drying, grinding and cutting. The battery adopts a bipolar plate structure with the electrochemical characteristics of a capacitor and a nickel-hydrogen power battery, has efficient charge-discharge and electrochemical reversible reaction characteristics, and combines the technological superiorities of high specific energy and large energy density of the nickel-hydrogen battery and high specific power, long cycle life, wide temperature and rapid charge-discharge and the like of the capacitor, thus realizing complete sealing and maintenance-free performance, improving the specific capacity, specific power and cycle life of the product, realizing the rapid charge-discharge and ensuring the high and low temperature working range of the battery and the security of the battery.

The invention discloses a sampling device for equal proportions of mixed water samples used in determination of an on-line water quality analyzer. The sampling device includes a first pipe, a second pipe, a quantitative small water pump, a mixing bucket and a sampling line. The second pipe is provided with a first electric ball valve, a Y-shaped filter, a manual sampling port and a tee joint overflow mouth, and the tee joint overflow mouth is communicated with the quantitative small water pump, the quantitative small water pump is connected with a tee joint electric ball valve, the tee joint electric ball valve is connected with the mixing barrel, the mixing barrel and a drainage electric ball valve are communicated through a sample supply pipe, the sampling line is connected with the sample supply pipe, and the sampling line includes a first sampling line and a second sampling line. The sampling device adopts multistage overflow filtering for pretreatment, and quantitatively adopts the brushless microflow quantitative small water pump for sampling, so that the stability and the accuracy of the device are improved, and the sample collection time consumption of the on-line analyzercan be reduced while sampling of the equal proportions of mixed water samples.

The invention relates to a safety and stability control device fault offline control strategy model generation method. The method comprises the following steps of: organizing a constant value monofile according to a set format, carrying out unified maintenance at a safety and stability control device side and sending upward to a scheduling control terminal; analyzing the constant value monofile, generating a constant value name according to a constant value table name and constant value unit name information of the constant value monofile, analyzing corresponding numerical value of the constant value name, and writing the constant value name and the corresponding numerical value thereof into a constant value table in a fault offline control strategy model; obtaining the constant value name from the constant value table, and reversely analyzing a constant value function subclass, constant value function property and constant value related equipment name from a constant value name based on a naming rule of the constant value name; and according to different device types, generating a strategy model according to set control logic of the safety and stability control device, and writing into a corresponding table of a database. The method provided by the invention has the advantages that no maintenance of a strategy model scheduling terminal is realized, and automation level of operation management of a large power system is effectively improved.

The invention discloses an underwater environmental monitoring wireless data acquisition and transmission device, which comprises an outer casing, a hydrologic information detection unit arranged on the outer casing and a circuit board installed inside the outer casing. A control unit connected with the hydrologic information detection unit, as well as a power supply unit and a radio frequency unit connected with the control unit, is arranged on the circuit board; the control unit is connected with the radio frequency unit through a data exchange and storage unit; and the radio frequency unit is in two-way communication with a ground base station. The hydrologic information detection unit comprises a plurality of sensors which are all connected with the control unit. The device has the advantages of low cost, timely and accurate data detection, safe use, reliable working performance, long service life and high intelligence level, is convenient for laying and maintenance, and can effectively solves the practical problems that the traditional manual underwater operation has high potential safety hazard, slow and inaccurate data acquisition, high time and labor consumptions, and so on.

The invention provides a gas density relay with an online self-checking function and a checking method thereof, which are used for high-voltage and medium-voltage electrical equipment. The gas densityrelay comprises a gas density relay body, a gas density detection sensor, a gas path partition pressure adjusting mechanism, an online checking contact signal sampling unit and an intelligent controlunit, wherein the intelligent control unit controls a partition piece of the gas path partition pressure adjusting mechanism to move, so as to partition the gas circuit connection of a first interface and a second interface; meanwhile, the volume of a sealed cavity is changed, and the gas pressure of the gas density relay body is slowly reduced so as to generate a contact action; the contact action is transmitted to the intelligent control unit by means of the on-line checking contact signal sampling unit, the intelligent control unit detects an alarm and/or locking contact signal action value and/or a return value according to a density value of the contact action, the checking can be completed without the need for a maintainer to go to the site, the reliability and efficiency of a powergrid are greatly improved, and the cost is reduced. Particularly, an electric control valve is not needed, so that the sealing performance is better, and the size is smaller.

The invention discloses a multifunctional remote communication device and a smart electric energy meter therewith. The multifunctional remote communication device comprises a housing, an antenna disposed on the housing, a terminal, a battery cover, and an acquisition and communication circuit module disposed in the housing. The terminal comprises two remote communication terminals and one RS485 communication terminal. The multifunctional remote communication device and the smart electric energy meter therewith are mounted in a base meter of a three-phase smart electric energy meter, which canrealize the multi-master communication, the remote meter reading, the status monitoring, and the automatic acquisition of other smart devices, thereby improving the reliability of the remote meter reading system, and has the advantages of stable operation and convenient use.

The invention relates to a method for improving meter reading stability of a power utilization information acquisition system. The method comprises automatic identification process and automatic maintaining process, wherein in the automatic identification process, electric energy meters produced by different manufacturers can be fast and successfully identified with fewer steps and simple flow, and communication successful rate is improved, so that meter reading stability is effectively improved; in the automatic maintaining process, electric energy meter files can be effectively and automatically maintained, free maintenance of the electric energy meter files is achieved, meter reading stability is further improved, robustness of the power utilization information acquisition system is improved, and operation cost is reduced.

The invention relates to an oil-cooled screw air compressor coaxial with a motor, which comprises an air compressor host and a circulating oil system. The tail part of the air compressor host is provided with a machine body bracket; a motor shell is arranged on the machine body bracket in a centering mode; the motor shell is provided with a cooling interlayer; the inner wall of the motor shell is provided with a motor stator; a motor rotor is arranged in the motor shell; the motor rotor is fastened with a driving shaft of the air compressor host so as to form one whole body; the cooling interlayer on the motor shell is communicated with the circulating oil system by an oil pipe. According to the invention, the rotor of the motor is arranged on the driving shaft of the air compressor host, so that the transmission efficiency of the motor achieves 100 percent; the oil-cooled screw air compressor fulfills the aim of integrating the motor with the air compressor host into one whole body, so that the motor is not provided with a bearing, fault points of the motor are eliminated and no maintenance of the motor is implemented.

The invention provides a communication network line topology-building and updating method and a communication network line topology-building and updating system based on a GIS. The method comprises the following steps: modeling the topology of a communication network line according to the data of a variety of communication objects; and when the data of the communication objects changes, updating the communication network line under modeling according to the change. The system comprises a modeling module and an updating module. Through the method, the consistency between drawing marking and field locations is ensured, and the randomness of and version error caused by artificial maintenance of drawing data are reduced. By establishing data interfaces matching power pole equipment, a shared tower is free of maintenance, and communication quality loss and customer complaint caused by power equipment maintenance and replacement and poor communication between departments are avoided. By allocating an ID to each piece of communication line equipment, a fault can be located quickly, and managers and personnel not familiar with the line position can locate and check the communication line equipment easily. Finally, unified management of communication line data is achieved.

The invention provides a full physics model simulation method for an electric power system. The method comprises steps that, an electric power model file is analyzed and is written into an electric network hierarchy database to acquire an electric network model; a trend data file and a simulation control program required for PSS/E calculation are established, and continuous trend calculation is carried out to acquire a PSS/E full physics model; an operation instruction of an external application program for equipment is processed; the PSS/E full model after topology change is analyzed; an equipment state in a PSS/E calculation database is corrected; trend calculation for the PSS/E full model is carried out. Through the method, precise simulation calculation for the full physics model including a knife switch is realized by PSS/E, maintenance free of the model is realized, the system is further enabled to have better expansibility, accuracy of PSS/E topology analysis and trend calculation is guaranteed, simulation accuracy and validity of the electric power system are improved, and reliable and accurate bases are provided for reliable operation and construction of the electric power system.

The invention provides a gas density relay with an online self-calibration function and a calibration method thereof, which are applied to high-voltage and medium-voltage electrical equipment. The gasdensity relay with the online self-calibration function comprises a gas density relay body, a gas density detection sensor, a normally-open valve, a normally-closed valve, an air chamber, an online calibration contact signal sampling unit and an intelligent control unit. Rise and fall of gas pressure are realized through the normally-open valve, the normally-closed valve and the air chamber, andthe gas density relay body is allowed to perform contact signal action; the contact signal action is transmitted to the intelligent control unit through the online calibration contact signal samplingunit; and the intelligent control unit detects an alarm and/or latching contact signal action value and/or a return value of the gas density relay body according to the density value obtained during the contact signal action, and calibration of the gas density relay can be completed without maintenance personnel going on site, thereby realizing maintenance-free, greatly improving reliability of apower grid, improving efficiency and reducing cost. Meanwhile, in the whole calibration process, zero emissions of gas, environmental protection, safety and economy are achieved.

The invention discloses a remote transmission gas density relay system and a verification method thereof, and the system comprises a background monitoring terminal which achieves the remote communication with at least one gas density monitoring device through communication equipment, and completes the online monitoring and verification of a gas density relay; the gas density monitoring device which comprises a gas density relay, a gas density detection sensor, a pressure regulating mechanism, a valve, an online check contact signal sampling unit and a circuit control part; a background monitoring terminal which controls the intelligent processor to close the valve. The pressure adjusting mechanism is used for adjusting the pressure to rise and fall through; the gas density relay is subjected to contact action; the signals are transmitted to the intelligent processor through the online check contact signal sampling unit, and the intelligent processor detects a contact signal action value and/or a return value according to the gas density value when the contact acts, so the remote verification of the gas density relay can be completed without the need for maintainers to go to the site; meanwhile, the maintenance-free can be achieved, and the benefits and reliable and safe operation of a power grid are greatly improved.

The invention relates to a method for designing a self-discharging truck for off-highway working conditions, which is characterized in that a power system (1) is connected to a main vehicle frame (8); a steering system (2) is connected to the left front outside of the main vehicle frame (8); a suspension system (3) is connected below the main vehicle frame (8); a braking system (4) is connected to the inside and the outside of the main vehicle frame (8); a hydraulic cylinder of a lifting system (5) is connected to the front end upside of an auxiliary vehicle frame (9) and a front plate of a cargo tank (6) through a cylinder connecting seat; the cargo tank (6) is connected to the upside of the auxiliary vehicle frame (9); the auxiliary vehicle frame (9) is connected to the upside of the main vehicle frame (8) through a bracket and a connecting plate; and a single edge of a cab (7) is arranged at the left front part of the main vehicle frame (8). The method defines a market for off-highway vehicles, determines technical index of the off-highway vehicles according to the determined market demand, simultaneously achieves the design of general layout according to the technical index, and mainly solves a vehicle ground system under an off-highway state.