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

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 provides a capacitor intelligent device and a monitoring method thereof. The device comprises a voltage sensor, a current sensor, a temperature sensor, a multi-channel analog-to-digital (AD) conversion device, a transmission module and a user background analysis and diagnosis system. The monitoring method comprises the following steps of: sampling a voltage signal, a current signal and a temperature signal of a single capacitor by using the voltage sensor, the current sensor and the temperature sensor respectively; transmitting the signals to a multi-channel AD converter; and transmitting the signals to a host computer by using the wired or wireless transmission module. Thus, on-line monitoring of voltage, current, capacitance and temperature of the single capacitor can be realized, namely when a fault takes place in the single capacitor, the voltage and the current at the two ends of the capacitor vary and can be discovered by working personnel in the host computer for early warning.

The invention is concerned with the high-voltage transformer equipment, especially the compound insulator and the manufacture technics, the technics processes are: 1) disposes the surface of the preparing rubber-setting part; 2) sets rubber; 3) disposes the surface of the preparing vulcanization part; 4) vulcanize the formed umbrella cover; the processes can cycle timely. The compound insulator includes the main body (-) of the insulator, the porcelain mandrel (-) on the main body (-)of the insulator, and the silicon rubber umbrella-skirt (-), the characteristic is: the porcelain mandrel (-) on the main body (-)of the insulator covers the integrative silicon rubber umbrella-skirt (-) outside. The invention is simple technics, easy clean, high efficiency.

The invention provides a rectangular-ambulatory-plane oil sealing structure of a steam turbine generator. The rectangular-ambulatory-plane oil sealing structure comprises a transition ring, an end cover and a sealing seat, wherein the transition ring forms sealing structures respectively with the end cover and the sealing seat by a sealing plate, a first branch oil passage and a second branch oil passage are formed in the transition ring and communicate with each other, the first branch oil passage and the second branch oil passage respectively penetrates through the sealing plate, an installation groove is formed in the end cover, a second sealing strip is embedded into the installation groove, an installation groove is formed in the sealing seat, a first sealing strip is embedded into the installation groove, the first branch oil passage and the second branch oil passage are filled with sealing oil, and the first branch oil passage, the second branch oil passage, the sealing plate, the second sealing strip and the first sealing strip jointly form the rectangular-ambulatory-plane oil sealing structure. By the rectangular-ambulatory-plane oil sealing structure, the hydrogen supplement quantity during running of the steam turbine generator can be greatly reduced, the application cost of the steam turbine generator is reduced, and the running safety and reliability of the steam turbine generator can be effectively improved.

The invention belongs to the technical field of gas turbine equipment and particularly relates to a high-pressure turbine moving blade set with damping vibration attenuation blocks. According to the high-pressure turbine moving blade set with the damping vibration attenuation blocks, the damping vibration attenuation blocks are arranged in cavities between adjacent high-pressure turbine moving blade extending roots, when an engine works, the damping vibration attenuation blocks rotate along with high-pressure turbine moving blades, the centrifugal force generated by the damping vibration attenuation blocks provides normal stress for friction contact between the damping vibration attenuation blocks and the high-pressure turbine moving blades, and when the blades vibrate, the vibration quantity is consumed through contact friction between the blades and the damping vibration attenuation blocks, so that the vibration stress is reduced. The high-pressure turbine moving blade set is simple and reliable in structure, good in vibration attenuation effect, easy and convenient to regulate and control, high in environmental adaptability and free of influences of an engine temperature field and a flow field, structural parameters of the high-pressure turbine blades do not need to be greatly changed, blade damping can be effectively increased, the safety margin of working of the high-pressure turbine moving blades is increased, the service life of the turbine blades is prolonged, and the gas turbine safe operation reliability is improved.

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 discloses a 220kV transformer station secondary equipment prefabricated cabin comprising a rectangular parallelepiped prefabricated cabin shell in which three transverse bearing plates and a plurality of vertical support plates in cooperation with three transverse bearing plates are disposed. The three transverse bearing plates divide, from top to bottom, the inner cavity of the prefabricated cabin shell into a 220kV secondary equipment zone, a main transformer secondary equipment zone, an 110kV secondary equipment zone and a cable storage zone. Each of the vertical support plates is provided with four first cable holes passing through the vertical support plate from left to right. The four first cable holes are located in the 220kV secondary equipment zone, the main transformer secondary equipment zone, the 110kV secondary equipment zone and the cable storage area respectively. The number of the vertical support plates is 2 to 10. The 220kV transformer station secondaryequipment prefabricated cabin is small in occupied area, flexible in layout, high in space utilization rate, reliable in operation of secondary equipment, and reasonable in cable / optical cable laying.

The invention discloses a hydropower station operation equipment fault information reporting method and system. The reporting method comprises the steps of: (1) receiving the fault information, collected by target in-situ management equipment, of operation equipment, and enabling the fault information to comprise identification information; (2) classifying and processing the fault information according to fault levels to generate fault level alarm information; and (3) sending the fault level alarm information to a target equipment maintenance user according to a corresponding relationship between the identification information of each piece of in-situ management equipment and the equipment maintenance user of the in-situ management equipment. According to the invention, the equipment faultinformation is classified and summarized, and the fault information is sent to a designated maintainer by using specific equipment, so that the equipment operation reliability is improved.

This invention relates to a supercritical pressure steam injection boiler including the burner, the hearth, the flue and the water supply pipe. The first and second radiant tube bundles are positioned inside the hearth, the first and second convection tube bundles are positioned inside the flue, the water supply pipe is connected to the shell side input of the heat exchanger, the shell side output of the heat exchanger is connected to the input of the first convection tube bundle via the first pipeline, the output of the first convection tube bundle is connected to the input of the first radiant tube bundle via the second pipeline, the third pipeline connects the output of the first radiant tube bundle and the tube side input of the heat exchanger, the forth pipeline connects the tube side output and the input of the second radiant tube bundle, the fifth pipeline connects the output of the second convection tube bundle, and the output of the second convection is connected to the steam discharge pipe. This invention moves the steam terminal heating tube bundle from the radiant section to the convection section, which avoids heat transfer deterioration, increases the steam pressure to 26MPa and solves the exploitation problem in high pressure deep block and super heavy oil block.

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 relates to a safety anti-falling device of a street lamp pole communication micro base station. The safety anti-falling device comprises a base station connecting plate, a base station fixing support, a gyroscope sensor and a rod reader, wherein the base station connecting plate is detachably sleeved with a street lamp pole, the base station fixing support is detachably installed onthe base station connecting plate, the communication micro base station is detachably installed on the base station fixing support, and the gyroscope sensor and the rod reader are installed at the same time. According to the device, the design is scientific and reasonable and the structure is simple; the detachable base station connecting plate and the base station fixing support structure are innovatively designed, so that the flexible installation of the micro base station is realized, and the micro base station is suitable for street lamp poles and micro base stations with various specifications and models; and the gyroscope sensor, the rod reader and an anti-falling chain are additionally arranged, the effectiveness of fault processing is improved, the reliability of fixing the micro base station on the street lamp pole is further guaranteed, so that personnel and vehicle damage accidents caused by falling of the micro base station are effectively avoided, and the safety of personnel and properties around the lamp pole is guaranteed.

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 supercritical pressure steam injection boiler has a burner, a furnace, a flue, and a water supply pipe. First and second radiant tube bundles are arranged in the furnace, first and second convective tube bundles are arranged in the flue, and the water supply pipe and heat exchange The shell-side inlet of the heat exchanger is connected, the shell-side outlet of the heat exchanger is connected with the inlet of the first convection tube bank through the No. 1 pipe, the outlet of the first convection tube bank is connected with the inlet of the first radiant tube bank through the No. The outlet of the heat exchanger communicates with the tube-side inlet of the heat exchanger through No. 3 pipe, the tube-side outlet of the heat exchanger communicates with the inlet of the second radiant tube bundle through No. The inlet of the tube bundle is connected, and the outlet of the second convection tube bundle is connected with the steam discharge pipe; the invention moves the tube bundle heated by the final stage of steam from the radiation section to the convection section, avoiding the deterioration of heat transfer, and the steam pressure can reach 26MPa, solving the problem of high-pressure deep well The problem of difficulty in mining block and super-heavy oil block.

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.

The invention relates to an infrared induction solar acousto-optic bird repellent, comprising a fixed bracket for fixing the bird repellent, a solar power generation panel for providing electric energy, a spare lithium battery, an infrared sensor, a mode conversion switch, an LED flash lamp, an ultrasonic Horn. In terms of bird repelling methods, the bird repellent uses the infrared sensor to send out instructions when the bird is close to the equipment within 7-8 meters. The bird repellent has more advantages in terms of safe operation, continuity, practicability, and environmental protection: 1. Easy installation and low cost, about 30% lower than similar products; 2. Good reliability in safe operation: long-term operation5 ‑7 years without failure, the safe operation reliability is about 30% higher than that of similar products.

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.

The invention provides a gear ring defect detection device and method, and relates to the technical field of gear ring defect detection. The device comprises a control module, a detection module and a display module; the control module is in communication connection with the detection module and the display module. The detection module is in communication connection with the display module; the control module is used for generating a control instruction and sending the control instruction to the detection module; the detection module is used for detecting defects of the gear ring according to the control instruction to obtain detection data and sending the detection data to the display module; and the display module is used for generating display data according to the detection data, displaying the display data and sending the display data to the control module. The internal defects of the gear ring can be detected, and the problem that the internal defects of the gear ring are difficult to detect due to the structural shape is solved; and whether the gear ring has crack propagation or not can be monitored in the operation process, the crack can be found when the crack is in a small state, and the safe operation reliability of equipment is improved.

The invention provides a double-C-shaped elastic wiring device, and belongs to the field of electricity. The double-C-shaped elastic wiring device is formed by a double-C-shaped double-opening elastic wire clamp, a cup head square neck bolt and a hexagon flange nut. The double-C-shaped double-opening elastic wire clamp comprises a first C-shaped curved surface component and a second C-shaped curved surface component. The open end of the first C-shaped curved surface component is provided with a first extended straight edge and a second extended bevel edge, the other end of the second extended bevel edge is connected with one end of the open end of the second C-shaped curved surface component, and a third extended straight edge is arranged at the other end of the open end of the second C-shaped curved surface component. A regular polygonal hole is formed in a support. The cup head square neck bolt is arranged in the regular polygonal hole. The cup head square neck bolt penetrates a first bolt hole, a long hole and a second bolt hole to be connected with the hexagon flange nut in a rotating and fastening mode. Rapid fastening of a wire can be achieved by the utilization of only one socket wrench, equipment hot-line wiring operation can be performed on an electric pole conveniently, and the double-C-shaped elastic wiring device is suitable for wiring of two wires of different diameters at the same time and can guarantee the personal safety of operators in the operation process.