126results about How to "Improve operational safety and reliability" patented technology

The invention relates to an intelligent prediction method for the ultra-high plant safe distance of an overhead transmission line. The method includes the steps that a tree height growth model is selected, the tree height below wires is predicted, and the predicted tree height C is acquired; calculation is conducted according to the formula shown in the specification, and the predicted span interval delta h is acquired; the predicted span interval delta h is compared with the preset electrical safe distance, and then tree processing early warning information is acquired. By the adoption of the method, the operating safety and reliability of the overhead line can be effectively improved.

The invention relates to a method for preparing cellulose nanocrystals by combining biological enzymolysis and mechanical shearing. The method comprises the following steps of: preliminarily hydrolyzing or dismantling fiber or damaging 1,4-beta-D glucoside bonds in a cellulose amorphous region by using endoglucanase firstly, and then carrying out high-speed high-pressure mechanical shearing to obtain the cellulose nanocrystals. According to method disclosed by the invention, the operation safety and reliability are improved without the traditional strong acid hydrolysis; and meanwhile, the diameter and the length-diameter ratio of the cellulose nanocrystals can be adjusted by adjusting the enzymolysis and mechanical shearing degrees. The cellulose nanocrystals obtained by using the method are good in mechanical strength, good in crystallinity, moderate in length-diameter ratio and strong in light transmissivity, and; no acid radical ion is adsorbed onto the surfaces of the cellulose nanocrystals; and the cellulose nanocrystals are expected to be applied to the field of materials, such as polymerization enhancement, filtration, environmental friendliness and biomedical application instead of the traditional cellulose nanocrystals.

The invention discloses a transformer operation state prediction method based on a long short term memory network. The transformer operation state prediction method comprises the steps that (1) historical information related to the transformer operation state is acquired; (2) the historical operation state of the transformer is assessed based on the historical information; (3) a transformer operation state prediction model based on the long short term memory network is constructed; (4) the transformer operation state prediction model is trained based on the historical information and the historical operation state; and (5) the operation state of the transformer in the future is predicted based on the historical information through the transformer operation state prediction model. Besides,the invention also discloses a corresponding system. The operation state of the transformer in the future can be effectively predicted; the potential threat of the transformer can be perceived in timeand the fault development trend of the transformer can be mastered by prediction of the transformer operation state; and the method and the system have important meaning for enhancing the equipment operation safety and reliability.

The invention relates to the technical field of fused salt energy storage, in particular to a thermal power generating unit fused salt step energy storage and discharge peak regulating system and method. The thermal power generating unit fused salt step energy storage and discharge peak regulating system comprises a thermal power generating unit and a fused salt step energy storage and discharge system. The thermal power generating unit comprises a boiler, a main turbine, a condenser, a condensate pump, a water feed pump, a regenerative system, a water feeding pump small turbine, an auxiliarysteam pipeline, a induced draft fan small turbine and an air and flue gas system. The fused salt step energy storage and discharge system comprises a high-temperature steam-fused salt heat exchanger set, a low-temperature steam-fused salt heat exchanger set, a high-temperature fused salt-steam heat exchanger set, a low-temperature fused salt-steam heat exchanger set, a high-temperature hot fused salt tank, a low-temperature hot fused salt tank and a cold fused salt tank. When the thermal power generating unit operates at low loads, the heat of redundant steam is stored to high-temperature andlow-temperature hot fused salt in a step manner, and the steam releasing heat is subjected to step utilization; and when the load need of the unit is high, the heat of the high-temperature and low-temperature hot fused salt is released to unit steam in a step manner is subjected to step utilization, the utilization rate of the equipment is increased, and the power generation efficiency, safe reliability and economical efficiency of the equipment are improved.

The hydraulic empty container piling crane includes walking chassis, operator's cab, gantry and sling. The operator's cab and the gantry are installed on the walking chassis, and the sling is installed onto the gantry. The walking chassis includes chassis frame, engine, hydraulic pump, hydraulic motor, speed reducer, half shaft, wheel mechanism and tyre assembly. The hydraulic pump is connected to the output of the engine and connected via pipeline to at least two hydraulic motors, the hydraulic motor has output connected via the speed reducer to the half shaft, the half shaft is connected via the wheel mechanism to the tyre assembly, and the speed reducer is installed on the chassis frame. The present invention has high work efficiency, convenient operation, low use cost and other advantages.

The invention relates to a temperature monitoring system for a key part in a switchgear based on low-cost infrared thermal imaging technology. The system comprises a monitoring terminal and a temperature collecting and displaying system that are in communication connection. Temperature data, collected by the temperature collection and display system, of a key part area in a switchgear are transmitted to the monitoring terminal; and the monitoring terminal stores and analyzes the data. With the low-cost and low-resolution infrared thermal imaging technology, the direct contact with the high-voltage switchgear part is avoided; and the temperature in the small area can be measured accurately. Therefore, the regional temperature measurement function of the key parts in the switchgear is realized and the cost of infrared temperature measurement is lowered.

The present invention provides a liquefaction-suspension combined combustion boiler comprising a vertical combustion chamber arranged in routine boiler, the combustion chamber has a bubble fluidized-bed combustion section equipped with a feeder, fluidized bed slag discharge opening on bottom; the combustion chamber has a low-temperature reducing property main combustion section on lower portion and a high temperature oxidation combustion section on upper portion. The main combustion section on lower part of the combustion chamber comprises a primary air nozzle and auxiliary air ejector nozzle arranged on walls on opposite sides of the combustion chamber for mixture of primary air-fuel entering into the combustion chamber. The high temperature oxidation combustion section on upper portion of the combustion chamber has at least one layer of secondary air nozzle arranged above the primary air nozzle. The primary air-fuel mixture nozzle and the oppositely arranged auxiliary air ejector nozzle form a strong rotation-circulation flow field at lower part of the combustion chamber, which implements combustion of majority of fuel in main low-temperature and reducing property combustion section, uncombusted particle and fuel gas are combusted on upper portion of the combustion chamber. The invention has advantages of high combustion efficiency, low harmful substance discharge, simple structure, safe and reliable operation.

The invention provides a three-bypass-breaker serial ultra/extra-high voltage subsection series capacitor compensation device. In the invention, the current transfer is realized during series compensation switching by the series combination of a newly added bypass breaker and two conventional bypass breakers, and the requirement on the current transfer capacity of a bypass isolation switch is reduced greatly; moreover, the device has excellent error protection property, and solves the problem that the bypass isolation switch transfer current of the ultra/extra-high voltage subsection series capacitor compensation device exceeds the standard.

The invention relates to an efficient heating device which is characterized in that an induction coil is wound on an outer drum, a plurality of hollow inner heating pipes are arranged in the outer drum, two ends of the outer drum are fixedly connected with supporting frames respectively, the inner heating pipes are fixedly connected with the supporting frames, and the induction coil is electrically connected with a power supply. During use, alternating current is input into the induction coil, temperature of the outer drum and the inner heating pipes rises simultaneously, fluid flowing through the inside of the outer drum and the inside and the outside of the inner heating pipes is heated in contact mode directly, a purpose that a fluid section of large-flow fluid is heated with high power through electromagnetic induction is achieved, and a purpose of separating the heated fluid and an outer circuit is achieved. The efficient heating device has the advantages of being high in operation safety and reliability, small in maintaining workload, high in heat efficiency, high in power, small in fluid pressure loss and the like. The efficient heating device can be widely used for heating air, water, crude oil in oil conveying pipelines and chemical reaction kettles and the like.

The invention relates to an intelligent adjustment system for a metal-enclosed middle-arrangement switchgear of a substation and an adjustment method of the intelligent adjustment system. The intelligent adjustment system comprises a main machine device, an input pipe and an output pipe, the main machine device comprises a box body and a temperature adjustment device and a humidity adjustment device arranged in the box body, the box body is provided with an air input opening and an air output opening, the air input opening is connected with the air output end of the metal-enclosed middle-arrangement switchgear through the input pipe, and the air output opening is connected with the air input end of the metal-enclosed middle-arrangement switchgear through the output pipe. The intelligent adjustment system has the functions of removing moisture, adjusting the temperature and preventing electric equipment from getting dirty, and wet and hot air in the switchgear is sucked through a sealed pipe, so that moisture is removed, the temperature is controlled and dirt in the air in the switchgear is removed, and safety and reliability of operation of the power grid are really improved.

The invention discloses a hydraulic control system of a drill loader. The hydraulic control system comprises a primary pump, a secondary pump, a first multi-way directional valve, a second multi-way directional valve, a pilot oil control valve unit, an anti-jamming valve unit, a pilot oil source valve unit, a track tensioning valve unit, a third multi-way directional valve, a first hydraulic pilot control valve unit, a second hydraulic pilot control valve unit, a first hydraulic pilot control valve device, a second hydraulic pilot control valve device, a third hydraulic pilot control valve device, a hand-operated directional valve, a first balance valve and a boom cylinder. The hydraulic control system of the drill loader disclosed by the invention has the advantages that as a multi-stage propulsion manner and impact pressures are set, the drill loader can adapt to different geological conditions, and initiative jamming prevention is effectively realized; when the jamming is caused, the hydraulic control system disclosed by the invention can control an impactor and a propulsion cylinder to switch into light impact and light propulsion operations, blast holes are repaired, and the jamming preventing effect can be effectively improved; and the hydraulic control system of the drill loader disclosed by the invention adopts a load-sensitive technique, so that the efficiency and accuracy of the hydraulic control system of the drill loader are improved.

The invention discloses a false cable joint, applied to the laying process of a long cable to replace part of real joints to achieve cross interconnection. During the manufacture of the false cable joint provided by the invention, the cable at the position where a joint needs to be arranged is stripped in three modes, wherein the first mode is stripping from an outer insulating layer of the cable to a semiconductive buffer band and then recovering insulation and waterproofness of the cable; the second mode is stripping from an outer insulating layer of the cable to an outer semiconductive layer, wrapping the outer semiconductive layer by an annular stress cone or a semiconductive band and an insulating tape in layers to homogenize field intensity distribution and limit an electric field within a safe range, and then recovering insulation and waterproofness of the cable; the third mode is only stripping part of an outer insulating layer, earthing a shielding sheath and then recovering insulation and waterproofness of the cable. Cross interconnection is achieved by replacing the real joints with the false joints to reduce influence of induced voltage of the metal sheath of the long cable, and thereby required investment for joints in a cable laying project is reduced on basis of not changing a traditional design philosophy of cross interconnection .

The invention relates to an automatic-driving car tire pressure, car speed and road surface condition integrated management device. The device includes a main controlling device, a tire pressure detecting device and a road surface detecting recognition device, the main controlling device is separately connected with the tire pressure detecting device and the road surface detecting recognition device in a wireless mode, and the tire pressure detecting device includes a temperature sensor, an air pressure sensor, a storage battery, a bearing shell and a wireless data collecting circuit; and theroad surface detecting recognition device includes a bearing base, a guiding sliding rail, a sliding block, a distance-measuring device, a wireless data treatment circuit and an auxiliary power supply, and the main controlling device is embedded in a car navigation bridge and includes a protective shell, a main controlling circuit and a satellite navigation device. The automatic-driving car tire pressure, car speed and road surface condition integrated management device can meet the requirement for the whole way detection for the car speed, the tire pressure and the other information during running of the car on the one hand and can detect the road surface condition where the car passes in the running process on the other hand, and the security and the reliability during running of the carare greatly improved.

The invention claims to protect a tire pressure monitoring system for a single-track train, and belongs to the field of tire pressure monitoring devices for a rubber tire type single-track train. According to the monitoring system, one train is used as an independent monitoring unit, and each train comprises a set of the tire pressure monitoring system for the single-track train; according to the monitoring system, wireless pressure sensors are used, and tire pressure information is acquired in a manner of a wireless radio frequency signal; ultrasonic distance measuring sensors are used, and altitude data information is acquired in a manner of a current simulation signal; a data processing communication device is used for firstly screening acquired real-time measuring signal data, the screened real-time measuring signal data is filtered, then logic operation is performed on the filtered real-time measuring signal data, judgment is performed on the real-time measuring signal data after the logic operation, storage treatment is performed on the real-time measuring signal data after the judgment, and then the real-time measuring signal data after the storage treatment is uploaded to a train central controller through a train special communication interface and a control network according to a set time interval, so that the purpose of monitoring the operation safety of the train in a real-time manner is achieved. The tire pressure monitoring system disclosed by the invention has functions of power on self test, tire pressure under-pressure early warning, low-pressure warning, over-pressure warning, tire quick air leakage warning, height monitoring early warning and warning, normalcy data acquisition, normalcy system fault diagnosis, data backup and the like.

The invention relates to an uninterruptible power supply for a high-frequency soft switch of a locomotive air conditioner, which mainly comprises an access port of a contact network and a three-phase inverter. The uninterruptible power supply is characterized in that after passing a multiple filter network, an input voltage introduced by the access port of the contact network is converted into an output voltage by passing a primary rectification filter circuit, a high-frequency inverter, a high-frequency boost transformer, a secondary rectification filter circuit, a PWM (Pulse-Width Modulation) chopper circuit and the three-phase inverter in sequence; and a battery circuit is connected in parallel between the PWM (Pulse-Width Modulation) chopper circuit and the three-phase inverter. The invention also discloses a realization method of the uninterruptible power supply for a high-frequency soft switch of a locomotive air conditioner. The uninterruptible power supply can inhibit the peak pulse voltage of the contact network, and the PWM (Pulse-Width Modulation) chopper circuit adopts a single-phase bridge inverter booster circuit and is controlled by an analog circuit method, and thus, the uninterruptible power supply has the characteristics of good dynamic quality, high anti-jamming capability, and the like.

The invention discloses a desuperheating water system applied to high and low pressure bypass combined heating. The desuperheating water system comprises a boiler, a high pressure cylinder, an intermediate pressure cylinder, a low pressure cylinder, a heat grid heater and a deaerator. A part of live steam of a superheater outlet of the boiler enters the high pressure cylinder for work, and a partof the live steam enters a high pressure bypass pressure and temperature reducing valve set. The steam discharged from the high pressure cylinder and the steam of an outlet of the high pressure bypasstemperature and pressure reducing valve set are converged and then enter a reheater of the boiler to absorb heat again. In a pipeline system of a heating-steam extraction-heating supply header, because the specific volume increases rapidly after decompression by heat and steam, in order to promote the effect of atomization temperature reduction and avoid potential safety hazards caused by water attacks caused by water in steam, a two-stage temperature reduction device is arranged, a first-stage desuperheater enters first after decompression by heat and steam, the desuperheating water is takenfrom an outlet of the last stage high pressure heater, a second-stage desuperheater then enters, the desuperheating water is taken from an outlet of a heat grid drain pump, and the effect of temperature reduction and the safe reliability of pipeline operation are improved.

The invention relates to a maximum transient overvoltage analysis method and system of an offshore wind plant electrical system. Structural data of the offshore wind plant electrical system is obtained, simulation is performed according to the structural data, and a simplified wind plant electrical system with the offshore wind plant electrical system as a research object is established. Transient overvoltage of the simplified wind plant electrical system under the switching-on situation, transient overvoltage under the switching situation and transient overvoltage under the short-circuit fault situation are respectively simulated, further the maximum transient overvoltage of the offshore wind plant electrical system is obtained, and a result is output. By synthesizing the transient overvoltage under the switching-on situation, the transient overvoltage under the switching situation and the transient overvoltage under the short-circuit fault situation of an offshore wind plant, the maximum transient overvoltage of the offshore wind plant electrical system under the three working conditions is obtained, accordingly references are provided for insulation matching, device type selection and the like of the electrical system, and the operating safety reliability of the wind plant is improved.

The invention discloses a constant-temperature constant-humidity control crucible for intelligent substations. The constant-temperature constant-humidity control crucible comprises a body; the body comprises a first sidewall, a second sidewall, a top plate, a bottom plate, a front door and a back panel. The front sidewall, the second sidewall, the top plate, the bottom plate, the front door and the back panel enclose a rectangular space. A device mounting plate is disposed within the body. A voltage electroscope, a merging unit, a line protector, an intelligent terminal and a server are disposed in order on the device mounting plate from top to bottom. A precision air controller is embedded in the middle of the first sidewall. An electrical cabinet condensing dehumidifier is disposed on the lower portion of the second sidewall. The constant-temperature constant-humidity control crucible has the advantages such that preset constant temperature and humidity is kept in the crucible, equipment in the crucible is kept running safely and stably and running safety and reliability of the crucible is improved.

A dual-bearing cable track with adjustable height of tower support comprises bearing cables, a tower support, a twist drive circulated drawing cable, a cart, a driver, a bearing cable tension device, and a ground anchor, wherein two bearing cables are arranged, the cart is supported on the two bearing cables via wheels supported by a sealed frame, to avoid dropping cart caused by bias weight center of the cart, each leg of the tower support is mounted with a height adjuster to adjust the leg length according to the track height and landform, the circulated drawing cable is connected with the driver which is mechanically rotated without power supply, to avoid being limited by power supply, the two bearing cables are made from two steel lines, to be connected and fixed with two support wheels on the tower support and the ground anchor. The invention has high safety, easy operation, low cost, simple production and wide application.

The invention discloses an online precision chemical descaling device and method thereof of an industrial tube nest type water cooler. A descaling agent distribution device and a servo control device are arranged outside a water chamber of the water cooler, an underwater positioning device and a descaling agent injection device are mounted in the water chamber of the water cooler, the underwater positioning device is connected with the servo control device through a waterproof cable, the descaling agent distribution device is connected with the descaling agent injection device through a guide tube, the servo control device transmits commands to the underwater positioning device, descaling agent injection nozzles on a driving support and orifices of cooler heat exchange tubes are docked, and the descaling agent distribution device supplies descaling agent to the descaling agent into the descaling agent injection nozzles. After set washing and soaking time is up, the descaling agent injection nozzles are separated from docking with the orifices of the cooler heat exchange tubes under drive of the servo control device and automatically move to inlets of the next group of cooler heat exchange tubes. On the premise of zero emission, reliability of operating of the equipment is improved, cleaning cost of the cooler is greatly reduced, and cleaning effect is greatly improved.

The invention relates to an anti-corrosion chimney and an installation and construction method thereof. A glass fiber reinforced plastic inner cylinder is arranged on the inner cylinder part, above the elevation of 26.5 m, of the chimney, and imported ceramic vitrified bricks are additionally arranged on the steel inner cylinder, below the elevation of 26.5 m, of the chimney and a horizontal flue,or imported glue coating is carried out. The installation and construction method comprises the steps that the steel inner cylinder and an anti-corrosion lining which losts the anti-corrosion function in an original chimney are removed, and the defects of accessory parts of the chimney are repaired; then, a bearing platform is arranged at an appropriate elevation position in combination with theoriginal chimney and the accessory structure inside the concrete chimney and above an ash deposition platform, the self-supporting glass fiber reinforced plastic inner cylinder is installed, and a certain interval is reserved with the outer wall of the chimney after installation, so that daily inspection is conveniently carried out on the operation condition of the chimney. The anti-corrosion chimney has high anti-corrosion and adaptability to various acid, alkali and climate changes. The construction period is short and the investment cost is low.