41results about How to "Improve safe operation reliability" patented technology

This invention relates to a vehicle partition positioning taking device with vehicle door protective mechanism, which contains transversal moving mechanism, guiding wheel, rail, rolling way, base frame, driving mechanism, positioning lever, and door protective bar, wherein transversal moving mechanism moving along rail by driving mechanism and guiding wheel which fixed on bas frame, rolling way supporting vehicle and being the rail for taking or parking vehicle, a group of four positioning levers and a group of a number of vehicle door protective bars set in transversal moving mechanism, said positioning levers and protective bars lifting or lowering for stopping and protecting vehicle. Said invention has simple structure and high reliability and adapts for various kinds of rolling rail mechanical parking equipment.

The invention provides a device for automatically controlling humidity in a cabinet. The device comprises a bottom plate, wherein a terminal strip conditioning tank, an automatic dehumidification controller and an alternating current contactor are arranged on the bottom plate respectively; a terminal block is arranged on the terminal strip conditioning tank; and a humidity probe is arranged on the automatic dehumidification controller. By the device, the conventional control mode of switching on / off dehumidification equipment is changed; due to the adoption of an automatic control technology, the dehumidification equipment can be automatically switched according to the humidity in a switch cabinet; and the device has the advantages that: the working efficiency of the dehumidification equipment is comprehensively improved, the labor intensity of personnel is reduced, the safe operation reliability of electrical equipment is improved, and the like.

The invention provides an online monitoring method for the wall temperature of a vertical water wall of an ultra-supercritical boiler. The wall temperature of the vertical water wall is calculated through a sectional calculating and data fitting method according to structural parameters of the vertical water wall and operation parameter information of a unit. The invention further provides an online monitoring system for the wall temperature of the vertical water wall of the ultra-supercritical boiler. The online monitoring system is composed of a calculating server, a database server, a web site server, a client side browser and a plant level monitoring device. The web site server is connected with the client side browser; the database server is connected with the calculating server; and the database server has access to the plant level monitoring device, and therefore the system can be connected with a boiler DCS. By means of the online monitoring method and the online monitoring system, the phenomenon that parts of pipe sections of the vertical water wall run at an excess temperature for a long time can be effectively avoided, the service life of the vertical water wall is prolonged, and the reliability of safety operation of the boiler is improved.

A multi-micro-grid fault management method with consideration of island operation time uncertainty comprises the following steps of S1, performing discretization processing on continuous 24 hours in one day; S2, establishing a current prediction model; S3, according to RES output, load prediction and uncertain island time, generating a random scene according to an MC method; S4, according to the supply-and-demand relation of each micro-grid, determining the current electricity price in real time; S5, minimizing the cost of a single micro power grid in the system, establishing a micro-power-grid operation total cost model; S6, based on a limited time domain rolling optimization framework, optimizing each micro power grid, thereby realizing an optimal operation state; and S7, establishing agaming operation model of a micro power grid of the micro power grid group, obtaining a strategy set according to the steps S6-S7, searching an optimal decision by each micro grid, and calculating whether Nash equilibrium is reached. The multi-micro-grid fault management method has advantages of effectively improving economic performance and safety of the micro power grid, effectively minimizing load reduction and reducing operation risk.

A vehicle separation, positioning, and delivery device with a door protection mechanism in the field of traffic engineering, including: a traverse mechanism, guide wheels, guide rails, raceways, an underframe, a drive transmission mechanism, a positioning rod, and a door protection rod; the traverse mechanism Drive the transmission mechanism and the guide wheel to move along the guide rail, the guide rail and the drive transmission mechanism are fixed on the chassis, and a set of continuous raceways are set on both sides of the traversing mechanism on the chassis to support the stored vehicles, which are also used for vehicle retrieval. Transversely move the conveying raceway during delivery. A set of four positioning rods and a group of several door protection rods are set on the traverse mechanism corresponding to each parking space. Or fold in, lower, and the positioning bar that opens stops at the inboard wheel rim of vehicle and doubles as the actuating bar of picking up and delivering the vehicle, and the car door protection bar that lifts protects vehicle. The invention has simple and reasonable structure, high safety and reliability in use, and is suitable for various types of raceway storage type mechanical parking equipment.

The efficient energy saving conductive composite grease consists of conducting agent 15-70 wt%, organic dispersant 23-80 wt%, thickener 1-6 wt%, and coupler 0.2-1.0 wt%. The conducting agent is one orseveral selected from graphite powder, conducting fiber and conducting metal powder;and the organic dispersant includes polybutylene and synthetic hydrocarbon oil. The efficient energy saving conductive composite grease may be used widely for the protection of various kinds of junctions in electric power transmission system, and has the advantages of saving in energy, safety, long term stability, simple usage, etc.

The invention discloses an adjusting method for preventing flying of a high speed pantograph type current collector. The pantograph type current collector comprises insulators (1), a pantograph type current collector mounting seat (2), a lower arm (3), a lower guide rod (4), an upper arm (5) and a pantograph head (6); the lower end of the lower arm (3) and the lower end of the lower guide rod (4)are mounted to the pantograph type current collector mounting seat (2) in a hinged manner; the upper end of the lower arm (3) and the upper end of the lower guide rod (4) are hinged to each other through a connecting rod; the lower end of the upper arm (5) is hinged to the upper end of the lower arm (3); the pantograph head (6) is mounted at the upper end of the upper arm (5); the pantograph typecurrent collector mounting seat (2) is mounted on the three insulators (1) and is obliquely arranged; one end of the lower arm (3) is higher than one end with the lower guide rod (4); and the lower arm (3) is parallel to a reference plane of a roof, or an included angle between the lower arm (3) and the reference plane of the roof is a negative angle so that the lower arm (3) is inclined to the bottom of the reference plane of the roof. On the premise of keeping an existing four-connecting-rod structure and the size of the pantograph type current collector invariable, the aerodynamic characteristic of the pantograph type current collector under a high speed operation condition is optimized, the air lifting force borne on the pantograph type current collector during operating as a spare folding pantograph is reduced to prevent the spare folding pantograph from flying; and therefore, the safety operation reliability of the pantograph type current collector of a multiple unit train is enhanced.

The application relates to the technical field of distribution network line fault recognition and in particular to a method for recognizing an arc ground fault of a distribution network. The fault recognition method includes: determining the fault occurrence time of the distribution network line; extracting a plurality of cycle waveforms before and after the distribution network line fault; calculating the sampling phase angle difference sequence [phi](k) of the phase voltage of the distribution network line fault; calculating the first-order differential value sequence [delta]I(k) of the zero-sequence current after the distribution network line fault; obtaining a characteristic sequence M(k) according to the sampling phase angle difference sequence [phi](k) and the first-order differential value sequence [delta]I(k) of the zero-sequence current; and determining whether the distribution network line fault is an arc ground fault according to the number of abrupt change times of the characteristic sequence M(k) within a preset time. The fault recognition method can perform line maintenance and operation in areas with high incidence of arc faults of the distribution network, and can provide richer information on the safety maintenance and operation of the distribution network, and is very important for improving the reliability of the safe operation of the power grid.

The invention discloses a self-circulating automatic wheel hub pressure maintaining oil system for a large bulb tubular unit, which consists of a bulb tubular unit, an oil receiver, an oil collecting device, an oil return tank, a high-pressure oil tank, a governor, a hub high-level oil tank, It is composed of oil filling valve, oil leakage pipe of oil receiver, high pressure oil pipe, oil overflow pipe, manual oil discharge valve of high-level oil tank of wheel hub, pressure maintaining oil pipe of wheel hub and oil leakage pump. The whole bulb tubular unit is arranged in the flow channel, the oil receiver and the oil leakage pipe of the oil receiver are located in the bulb head of the bulb tubular unit, and the oil collecting device is located in the corridor at the lower part of the runner chamber of the bulb tubular unit, and the oil is replenished. The valve, high-pressure oil tank, governor and oil return tank are located at the elevation of 58m in the main building. The high-level oil tank of the hub and the manual oil drain valve of the high-level oil tank of the hub are located at the elevation of 65.15m in the main building. factory. The invention can realize the full-automatic circulation of the wheel hub pressure-holding oil, can effectively reduce the operation and maintenance workload, improve the safe operation reliability of the unit, and reduce the power utilization rate of the plant.