40 results about "Freezing rain" patented technology

The invention relates to the technical field of railway contact networks, in particular to an electrified railway anti-icing contact network and a control system.The device comprises a contact network wire and a brim flow guide structure arranged on the contact network wire in a sleeving mode; the upper part of the catenary wire is an arc-shaped surface, the middle part of the catenary wire is provided with a dovetail groove, and the lower part of the catenary wire is a conductive surface; the shape of the upper portion of the brim diversion structure is consistent with that of the upper portion of the contact network wire, the middle of the brim diversion structure extends towards the two sides to form brim-shaped diversion plates, and the brim-shaped diversion plates are used for guiding airflow to drive freezing rain water drops to slide towards the two sides so as to avoid a conductive surface; the brim-shaped flow guide plate is positioned below the dovetail groove; and after the cap-brim-shaped guide plate is sleeved on the overhead line system wire, the conductive surface can be in contact with the pantograph. Structural innovation and collaborative prevention and control logic are integrated, and the problems that an existing electrified railway anti-icing scheme is single, limited in function and insufficient in adaptability are solved.

The invention relates to the technical field of cross-linked polyethylene insulated cables, and discloses an overhead insulated cable with an anti-icing coating, which comprises a cable core, an inner shielding layer, an insulating layer, an outer shielding layer, an inner sheath, an armor layer and other conventional structures, and is characterized in that a driving assembly and an anti-icing jacket assembly are arranged outside at equal intervals; the driving assembly is driven by the fixed ring, the rotating ring and the micro motor to drive the spiral twisting wire to be alternately tightened and loosened, so that the flexible twisting sleeve synchronously realizes radial wriggling and circumferential bidirectional torsion, the outer wall of the flexible twisting sleeve is provided with a V-shaped axial twisting groove, and the outer wall of the flexible twisting sleeve is coated with a compound anti-icing coating; according to the scheme, a bonding interface for breaking an ice blank and the surface of the cable at the initial stage can be formed on an ice shell, a thin water film is quickly discharged to block an icing core, and the hydrophobic and ice-hydrophobic characteristics of the coating are matched, so that ice layer growth circulation is cut off from the source, icing thickening is effectively inhibited, and safety accidents caused by large-scale icing are avoided; and the operation reliability of the aerial cable in the freezing rain, high-humidity and low-temperature environment is improved.

The utility model discloses an anti-freezing rain pantograph lower arm gas circuit, which is characterized in that a gas pipe is arranged in an inner cavity of a lower arm rod, penetrates out of the side wall of the lower arm rod through a plate penetrating joint, and is fixed on the side wall of the lower arm rod. The plate-penetrating connector penetrates through a hole in the center of the circular plate, two ends of the plate-penetrating connector are locked by nuts, and the circular plate is fixed on the lower arm rod through screws. The two ends of the plate penetrating connector are respectively provided with a clamping sleeve nut, the opposite ends of the two clamping sleeve nuts are respectively provided with a thin nut, after the two clamping sleeve nuts are oppositely tightened, the two thin nuts are tightened, and the plate penetrating connector is fixed to the circular plate through the two thin nuts. And the air path is arranged in the lower arm, so that the air path can be prevented from being damaged by the falling ice, and the stability of the pantograph running in the freezing rain weather is improved.

The invention relates to the technical field of wind power generation equipment maintenance, in particular to a dynamic deicing system for a fan blade, which comprises an impact device for generating impact waves to an icing area of the fan blade, a monitoring device and a control device. Wherein the control device is used for calculating target impact energy required for deicing according to the ice layer thickness, the ice layer environment temperature and the crack value monitored by the monitoring device, and controlling the impact device to generate impact waves to an icing area for deicing based on the target impact energy; and calculating new impact energy of the impact device when the icing area meets a preset secondary impact condition, and controlling the impact device to perform secondary impact according to the new impact energy. Therefore, the problems that a traditional physical deicing technology is low in energy transmission efficiency, thick ice is difficult to remove, and the icing position positioning precision is insufficient are solved, the ice layer is subjected to chain fracture by accurately controlling the impact position, energy and the time sequence, and the method is suitable for efficient deicing of the large wind generating set under the extreme weather conditions of freezing rain, wet snow and the like.

The invention provides a high-strength, high-temperature-resistant and flame-retardant cable sheath material. The high-strength, high-temperature-resistant and flame-retardant cable sheath material is prepared from the following raw material components in parts by weight: 40-70 parts of matrix resin, 10-30 parts of reinforced fibers, 15-30 parts of a flame retardant, 5-15 parts of an anti-ant agent, 2-8 parts of a compatibilizer, 0.5-5 parts of a processing aid and 2-4 parts of color master batch. The matrix resin comprises at least one of polyamide-imide resin, polyether-ether-ketone or polyurethane resin. The reinforced fibers comprise amino modified carbon fibers and aramid fibers, and the mass ratio of the amino modified carbon fibers to the aramid fibers is 1: (1-3). The flame retardant comprises nano magnesium hydroxide and aluminum hypophosphite, and the mass ratio of the nano magnesium hydroxide to the aluminum hypophosphite is (2: 1)-(3: 1). The invention discloses a cable protection sleeve, and aims to solve the common problems that an existing cable protection sleeve is prone to embrittlement or deformation in extreme weather such as freezing rain and high temperature, novel materials are high in manufacturing cost and difficult to be put into large-scale commercial use, and meanwhile, termites and rodents damage cables.

The invention relates to the technical field of electric power meteorological disaster prediction, and particularly provides a power grid extreme freezing rain quantitative short-term and temporary early warning method and device, and the method comprises the steps: taking the meteorological element data, topographic feature data and freezing rain cumulative prediction amount of a region as the input of a pre-trained physical constraint deep learning model; obtaining a freezing rain accumulated correction output by a pre-trained physical constraint deep learning model; determining a freezing rain cumulative forecast quantity of the region based on the freezing rain cumulative correction quantity; and performing power grid extreme freezing rain quantitative short-term and temporary early warning on the region based on the freezing rain accumulated forecast quantity of the region. According to the technical scheme provided by the invention, the early warning precision and response efficiency of the power grid under the extreme freezing rain condition can be remarkably improved, and a scientific decision basis is provided for power system safety scheduling, emergency ice melting and equipment risk management and control.

The invention relates to an on-line ice preventing / melting method for a railway overhead line system powered by a star-delta transformer. The method comprises the following steps that the star-delta transformer is transformed; calculating corresponding required phase differences under different ice melting current values; the phase difference is used for judging the required transformer ice melting gear K at the moment; selecting a proper number of windings according to the K value in the third step; adjusting the number of turns of the corresponding winding of the transformer according to the winding turn value in the fourth step; and switching on the isolation switch of the partition post to melt ice. The method has the beneficial effects that the phase shifting function of the adjusted transformer is utilized, so that the traction power supply system forms circulating current to melt ice, normal operation of a train in extremely cold weather such as freezing rain is ensured, and large-area train shutdown caused by icing of a contact network is avoided.

The invention relates to the field of weather prediction, in particular to a winter rainfall phase state prediction method based on the thickness of a cold and warm layer, and the method comprises the steps: defining a melting layer and a freezing layer; after a first absolute threshold value and a first relative threshold value are determined, the absolute threshold value and the relative threshold value after dynamic optimization are obtained by taking a threshold value adaptive matching algorithm as a basic framework; and based on the absolute threshold and the relative threshold after dynamic optimization, a multi-rule collaborative discrimination system is constructed in combination with a cold and warm layer boundary and parameter extraction result, and a final rainfall phase prediction result and phase transformation probability distribution are obtained. According to the method, the temperature vertical structure of the ice particles and the freezing rain can be more accurately and quantitatively described through the newly prepared absolute threshold value and the threshold value relative index, the method has clear physical significance, the threshold value intervals are mutually independent and do not coincide, and a good judgment effect can be achieved on the ice particles and the freezing rain.

Electric heating anti-freezing rain high-speed rail contact line is to use electric heating method to make high-speed rail contact line heat, prevent high-speed rail contact line from icing in freezing rain weather, affect the normal operation of high-speed rail, solve the passenger stranded caused by the shutdown of high-speed rail in freezing rain weather and reduce the economic loss of railway company. Through the calculation of air heat dissipation power and electric heating power, the feasibility of the scheme is ensured.

This application belongs to the field of power system disaster prevention technology, and provides a method, device, electronic equipment, and storage medium for predicting icing areas. The method includes: acquiring atmospheric reanalysis datasets, site observation datasets, and terrain elevation datasets; preprocessing and filtering icing elements in the above data to obtain data based on freezing rain and climate fusion datasets, terrain feature tensors, and icing element data; inputting the obtained data into a pre-trained terrain adaptive convolutional network Monte Carlo random deactivation model, outputting the average probability of freezing rain and the standard deviation of uncertainty; inputting the average probability of freezing rain, the standard deviation of uncertainty, 10-meter high wind speed, wet-bulb temperature, supercooled precipitation, preset time step, icing density, and conductor equivalent radius into a Makkonen calibration model, outputting the predicted icing thickness; determining the predicted icing area based on a preset region, the predicted icing thickness, and preset conditions; thus improving the prediction accuracy of icing thickness and icing area.

The present disclosure relates to a freezing rain prediction training dataset construction method, device, equipment and medium. The freezing rain prediction training dataset construction method comprises: performing resolution alignment and data standardization processing on a multi-source fusion data body constructed based on satellite data and reanalysis data; determining freezing rain events in the processed multi-source fusion data body as positive sample data, and extracting non-freezing rain events based on a preset proportion to determine negative sample data, to construct a first training data sample set; incorporating a cloud top phase indicator factor calculated based on satellite data and an inversion layer intensity calculated based on reanalysis data into the first training data sample set in the form of new data channels to obtain a second training data sample set, and adding label information to the second training data sample set to obtain a freezing rain prediction training data sample set. Thus, the problem of imbalance between positive and negative sample categories is solved, and the accuracy of the freezing rain prediction result is improved.

The invention relates to a freezing rain disaster intensity weakening numerical simulation method and device based on warm cloud catalysis, electronic equipment and a storage medium, and the method comprises the steps: obtaining related condition data in a three-dimensional space, initializing a freezing rain particle swarm model based on the related condition data, selecting a manual intervention warm cloud layer region according to a preset condition, and carrying out the manual intervention of the warm cloud layer region; formulating a catalysis scheme by combining a preset target, performing first analog simulation on the catalysis scheme based on the freezing rain particle swarm model, determining an initial condition in a first analog simulation result, performing second analog simulation by combining the initial condition and the freezing rain particle swarm model, and calculating a freezing rain particle size spectrum, a freezing rain disaster intensity index and a freezing rain disaster grade, and determining a weakening value of the catalysis scheme to the freezing rain disaster intensity, and adjusting the catalysis scheme. Full-physical process coupling numerical simulation of warm cloud catalysis-raindrop particle size regulation-freezing rain formation-disaster intensity evaluation is realized, and the actual weakening effect of catalysis measures on freezing rain disasters can be quantitatively and objectively evaluated.

The present application relates to a kind of ice accretion and freezing rain device and test method suitable for low temperature environment, by the low temperature condition of being set by test equipment in environmental test chamber, according to the surface temperature of being tested equipment, the temperature of environmental test chamber is adjusted, so that the acceleration test of being tested equipment under low temperature can be carried out, and the real low temperature environment is simulated for being tested equipment;By setting mobile platform and spraying rack, being tested equipment can be uniformly sprayed and overall evenly iced in the process of experiment;By setting spraying device, water mist can be sprayed to being tested equipment, and the real freezing rain, ice accretion and rain environment are simulated;By setting axial fan, water mist sprayed by spraying device can be hit on the surface of being tested equipment, and the splashing icing and snow blowing environment are simulated;By setting measuring equipment, the environmental conditions of test area, the surface temperature of being tested equipment and ice accretion thickness can be measured, so whether the required environmental conditions of being tested equipment low temperature test are reached is judged.

The invention relates to the field of railway electrified power supply systems, in particular to a railway overhead line system icing form evolution characteristic quasi-steady-state numerical simulation method which comprises the steps of numerical simulation modeling, freezing rain liquid drop impact model setting, freezing rain liquid drop impact simulation, liquid film generation and phase change icing and ice layer appearance updating. According to the method, the whole process of the contact network surface from microscopic droplet impact to macroscopic ice layer formation is fully considered, the whole process comprises droplet impact, breaking, liquid film generation, phase change and ice layer form growth, compared with the prior art, prediction deviation caused by single link simplification is avoided, meanwhile, the grid is dynamically deformed through the RBF interpolation function, and the prediction accuracy is improved. Real-time updating of the ice layer appearance in the simulation process is achieved, and the limitation of a traditional fixed boundary method is overcome; in addition, the method also has the characteristics of real reproduced freezing rain intensity and environmental characteristics and high calculation efficiency.

The invention relates to the technical field of railway catenary deicing tests, in particular to a railway catenary deicing equipment rain, snow and ice multi-environment coupling test system which comprises an ice and snow wind tunnel bin and a ground verification bin, and a snow making module and a power module are arranged in the ice and snow wind tunnel bin; a spraying module, a contact network adjusting module and a deicing equipment driving module are arranged in the ground verification bin; the system further comprises a heat preservation module, a temperature control module, a pressure control module, a sensing module and a visual monitoring module. Accurate simulation of the icing state of the contact network is achieved through flying snow and freezing rain control, stress and airflow changes of the contact network can be truly reproduced, motion driving of multiple types of deicing equipment is compatible, the deicing operation process is simulated, the reliability of the deicing equipment in the extreme environment can be comprehensively verified, and the reliability of the deicing equipment is improved. The blank in the aspects of dynamic simulation, multi-phase coupling and system verification in the prior art is filled, and core support is provided for improving the anti-icing and deicing technology of the overhead line system.

The application provides a bridge component anti-icing performance test method and equipment, and the system realizes multivariate simulation test on the bridge cable icing process through integration of an adjustable angle support, a test piece refrigeration bin, an ice water control module and an automatic spraying module. The method comprises the following steps: recording initial parameters of the test piece, establishing a simulated freezing rain environment, performing a cyclic spraying test, measuring icing state parameters, and calculating and evaluating a comprehensive anti-icing index based on an equivalent icing amount, an anti-icing delay coefficient and an environmental correction factor. The application can solve the technical problems of low test efficiency, high cost and lack of evaluation method in the prior art.

The utility model relates to the technical field of vehicle low-temperature detection, in particular to a low-temperature experiment bin for vehicle detection. The low-temperature experiment bin for vehicle detection comprises an experiment bin body, a rotating plate, fixing blocks, an air cylinder, a refrigeration module, a temperature sensing module, a monitoring module, a water spraying module and an air circulation module, the left side of the experiment bin body is rotationally connected with the rotating plate, and the fixing blocks are symmetrically installed on the left side wall of the experiment bin body; inclined air cylinders are rotationally connected to the fixing blocks, and telescopic rods of the air cylinders are rotationally connected with the rotating plate. The refrigeration module and the water spraying module are integrally arranged in the experiment cabin, so that the experiment cabin can simultaneously simulate low-temperature and high-humidity environments including severe weather conditions such as rain, snow and freezing rain, the comprehensive simulation of multiple environmental factors is closer to an actual use scene, and the performance of a vehicle under extreme weather conditions can be more accurately evaluated; and valuable data support is provided for product development and quality assurance.

The invention relates to an on-line ice preventing / melting method for a railway overhead line system powered by a Vv transformer. The method comprises the following steps that the Vv transformer is transformed; calculating corresponding required phase differences under different ice melting current values; the phase difference is used for judging the required transformer ice melting gear K at the moment; selecting a proper number of windings according to the K value in the third step; adjusting the number of turns of the corresponding winding of the transformer according to the winding turn value in the fourth step; and switching on the isolation switch of the partition post to melt ice. The method has the beneficial effects that the phase shifting function of the adjusted transformer is utilized, so that the traction power supply system forms circulating current to melt ice, normal operation of a train in extremely cold weather such as freezing rain is ensured, and large-area train shutdown caused by icing of a contact network is avoided.

The invention relates to a freezing rain disaster layered catalysis simulation method and device based on dynamic feedback optimization, electronic equipment and a storage medium, and the method comprises the steps: obtaining related data of a catalyst to construct a freezing rain catalysis simulation model, coupling the freezing rain catalysis simulation model to a cloud micro-physical scheme of a meteorological numerical mode, determining a layered collaborative catalysis scheme, and performing a simulation experiment on the layered collaborative catalysis scheme based on the freezing rain catalysis simulation model, generating an optimization strategy according to the simulation experiment, constructing a catalytic efficiency quantitative evaluation method, outputting an optimization strategy meeting a preset condition according to an evaluation result, and generating a dynamic optimization layered sowing scheme. Finally, a multi-index evaluation system with the supercooled water-ice phase particle conversion efficiency as the core is established, the limitation of single-zone catalysis is broken through, and the supercooled water phase change efficiency and the freezing rain prevention and control accuracy are remarkably improved by analyzing a supercooled water-thermal inversion layer linkage mechanism and achieving layered collaborative intervention.

A rain and snow measuring device of nonbreakable silicone and light metal for usage in all types of weather or climate with out breaking and loosing measured amount.

The utility model relates to a hanging anti-ice shading structure device for the surface of a stay cable, which comprises a smooth stay cable, a hanging cable coat is wrapped outside the smooth stay cable, a bonding buffer layer is arranged between the smooth stay cable and the hanging cable coat, and a plurality of bulge units are arranged on the surface of the hanging cable coat at intervals. The smooth stay cable is a steel strand assembly formed by a plurality of twisted steel strands, and the steel strand assembly is wrapped with a cable hoop. The device can replace traditional wind vibration resistance measures such as a damper and an auxiliary cable under the ice-free working condition, ice control and wind vibration suppression are synchronously achieved under the freezing rain weather, the comprehensive operation and maintenance cost of the whole life cycle is reduced, and a zero-energy-consumption double-function innovative scheme is provided for stay cable protection.

The invention discloses an energy-gathered air cannon for eliminating the influence of freezing rain on power grid safety, and belongs to the technical field of power grid deicing equipment. The energy-gathered air cannon comprises a detonation chamber, a launch canister, a gas supply system, an electrical system and a chassis, wherein the detonation chamber is used for realizing gas detonation to generate shock waves; the launching cylinder adopts a horn mouth form, so that the airflow directionality is enhanced; the gas supply system is used for mixing air and propane gas in proportion through double-path gas supply and then conveying the mixture to the detonation chamber; and an electrical system adopts alternating current 380V power supply, supports wireless remote control, and can monitor the state of equipment in real time. Deicing is realized based on shock wave mechanics and a vibration effect, and the device has the advantages of lossless cleaning, high efficiency, rapidness, safety, reliability, environmental protection, energy conservation and high adaptability, can customize launch canisters for different key equipment of a power grid, is stable in operation and flexible in control, effectively solves the problem of icing of the power grid in freezing rain weather, is suitable for various power grid scenes, and has a wide application prospect.

1.The name of the design product: railway icebreaking device (intelligent type) 2.The use of the design product: the design is used for railway icebreaking device, and the product is used for railway power supply section employee training, and the contact network maintenance technology is explained combined with frozen rain disaster cases. 3.The design points of the design product: in shape. 4.The picture or photo that can best show the design points: perspective view.

The invention discloses a power system weak link identification method based on an improved long short-term memory neural network. The method comprises the steps of obtaining an LSTM prediction model based on an MFFA algorithm; future disaster data are obtained through a weather forecast, world meteorological organization and geological professional knowledge service system, wherein the future disaster data comprise an ice disaster initial position, a freezing rain amount, an ice disaster moving speed, duration time, an ice disaster influence radius, an environment wind speed, an instantaneous maximum wind speed, a wind speed offset and a wind speed influence radius; inputting system data and acquired future disaster data into the LSTM prediction model, and predicting the line fault rate in the system; calculating the importance degree of the load flowing through each line, wherein the importance degree is measured by the load quantity flowing through the line; and calculating the vulnerability degree of each line to obtain the weak link of the system. The weak links of the system are identified, corresponding strengthening measures are taken for the weak links, and the safety and stability of the system are improved.

The utility model relates to environmental simulation test technical field, specifically disclose a kind of adjustable icing and freezing rain device based on high-low temperature damp heat test chamber;Including high-low temperature damp heat test chamber, its internal test cavity can accommodate large test samples such as aircraft wing;Rainfall device is located at the top of test cavity by moving assembly, spray unit contains adjustable spray head group, the pitch angle of atomizing nozzle in spray head group is adjustable, inside is equipped with guide vane and aperture adjustment ring;Flow control unit passes through water pump, flowmeter, water valve and air valve;Water temperature control unit utilizes water cooler to adjust water temperature.Moving assembly is composed of first, second moving frame and extension structure, bottom is equipped with moving wheel, can flexibly adjust device layout.The device is coordinated each unit by controller, and in combination with temperature, humidity and icing thickness sensor, accurately simulate icing / freezing rain environment, can accurately test large equipment resistance, functional performance and deicing equipment technical effectiveness, provide reliable technical scheme for large component test.

1. Name of the designed product: Freezing rain sensor (SFR-100). 2. Use of the designed product: The designed product is used for freezing rain weather monitoring instrument. 3. Design points of the designed product: in shape. 4. Picture or photo that best indicates the design points: perspective view.

The invention provides an anti-icing method for spraying a super-hydrophobic material on pantographs of locomotives and motor train units, and belongs to the technical field of rail transit equipment protection. By selecting the high-performance super-hydrophobic coating and combining the surface pretreatment and spraying process, a uniform coating is formed, the adhesive force of an ice layer is remarkably reduced, and the icing problem of the pantograph in a freezing rain environment is solved, so that the accident risks of pantograph catenary arcing, contact failure and the like caused by icing are reduced. The anti-icing device has the characteristics of excellent anti-icing performance, high economy and good safety, and is suitable for the field of rail transit equipment protection.

The application discloses a kind of anti-vibration and anti-freezing cable-stayed cable, including cable body, cable body is equipped with first protective sleeve;First protective sleeve outer surface is wound with helical line, helical line is insulated cable helical line, for current input and further heating cable body surface;Helical line includes conductor and the second protective sleeve of being equipped outside conductor, second protective sleeve is used to heat conduction and insulation outwardly.This cable-stayed cable is wound with the raised helical line outside, and wind and rain vibration phenomenon can be realized to be inhibited, by being equipped with helical line outside cable-stayed cable, current is input to insulated cable helical line, and cable body surface can be heated, avoid frozen rain to adhere on pipe icing expansion, simultaneously avoid the rainwater of thawing to separate from cable-stayed cable, prevent continuous water line, avoid wind and rain vibration to protect anchor and deck;By being equipped with second protective sleeve outside the conductor of helical line, the insulation between helical line and cable body is achieved, avoid electric shock phenomenon, and second protective sleeve is used for heat conduction, and then the heating temperature of conductor is conducted to cable body surface.

In freezing rain or snowy weather, a lead of a railway power supply grid is easy to ice and ice to wrap the lead, so that a pantograph is in poor contact with the lead to generate an electric arc, some pantographs are burnt out by the electric arc, a vehicle loses electric energy and stops running, and the vehicle is forced to move slowly, so that normal operation of traffic is seriously influenced. The radiation wheel type wire ice and snow impacting mechanism is characterized in that a motor on a vehicle drives a transmission mechanism to drive a shaft on a rack to rotate, and meanwhile a plurality of radiation type wheels distributed on the shaft rotate; after the dynamic impact heads at the front ends of the spokes of the radiation type wheel sequentially impact ice and snow on a pantograph wire, the dynamic impact heads automatically adjust the heights of the dynamic impact heads to pass through the lower portion of the wire and rotate in cycles to impact the ice and snow on the wire, and a residual ice scraping component is installed in front of the pantograph.