131 results about "Freezing rain" patented technology

The invention relates to a slope water-soil loss experiment device and method under combined extreme meteorological conditions. The experiment device comprises an experiment table, a combined extreme environment simulation unit and a control system unit, wherein the experiment table comprises a bottom base, a slope base plate, a downstream baffle plate, soil block standard elements and an experiment table regulating device; the combined extreme environment simulation unit comprises a rainfall simulation device, an air field simulation device, a freezing rain simulation device, a snowfall simulation device, a sunlight simulation device, an air temperature simulation device and an overland flow simulation device; the control system unit comprises a power supply system, a water supply system and a signal acquisition and processing system. According to the invention, the slope water-soil loss experiment device and method under combined extreme meteorological conditions perform indoor simulation and measurement of a slope water body loss situation under a single or combined extreme meteorological conditions of rain storm, rain and snow, freezing rain, flood, drought, high temperature and the like, can achieve accurate and reliable results, and can be widely applied to water-soil loss monitoring, principle analysis and governance under complex variable meteorological conditions.

An apparatus to be used by motor vehicle drivers under conditions such as freezing rain, sleet or snow to allow improved forward vision. Comprised of a conventional windshield wiper assembly having an electrically conductive arm and a first elongated conductor, such as an insulated wire having a first end opposite a second end is provided, wherein the first end terminated by a first terminal connection at the base end of the wiper arm, and the second end is terminated at the electrical ground plane of the motor vehicle. A second elongated conductor is terminated at one end by a second terminal connection at the distal end of the wiper arm, and at the opposing end is electrically connected to an imbedded heating element in the wiper blade. A third elongated conductor is electrically connected at one end to the electrically opposing terminal on the imbedded heating element in the wiper blade and is routed down the wiper arm and is held close the wiper arm by a harnessing means such as a plurality of spaced clip connectors. The opposing end of the third elongated conductor communicates directly with a voltage control regulator for controlling or stopping electrical current. The system is electrically connected to the motor vehicle's existing fuse box to serve as the electrical power source.

The invention provides a power-frequency online anti-icing de-icing method for an electrified railway contact network. The method comprises the steps as follows: A, the head end and the tail end of any power-supply arm of an electrified railway traction substation are respectively connected with a head-end dynamic reactive compensation device and a tail-end dynamic reactive compensation device; and a temperature sensor is arranged on a contact network and connected with a controller of the head-end dynamic reactive compensation device and the tail-end dynamic reactive compensation device; and B, the temperature sensor monitors the temperature of the contact network, and when the detected temperature is lower than 0 DEG C, the controller controls the head-end and the tail-end dynamic reactive compensation devices to enter into an anti-icing de-icing working state and specific current is generated on a contact net for anti-icing and de-icing. The method is used to carry out automatic online anti-icing and de-icing under the condition that the railway is in a continuous running state and the power supply is not influenced, so that the contact network is not frozen in freezing rain, ice and snow and extreme weathers, thereby ensuring the safety of train operation.

The invention provides a preparation method of high-hardness wear-resistant super-hydrophobic concrete, and belongs to the technical field of building material preparation. The preparation method comprises: stirring and mixing cement, fine sand, water and a water-soluble low surface energy material to form a cement slurry; pouring the cement slurry into a mold, and flatly adhering a metal mesh to the lower surface of a pressure plate; making the lower surface of the pressure plate cover the mold; and carrying out natural air drying or cure drying to obtain the super-hydrophobic concrete. According to the present invention, the obtained super-hydrophobic concrete has advantages of high hardness, high wear resistance, freezing rain resistance, icing resistance, freeze thawing resistance, self-cleaning property, corrosion resistance and the like, and can significantly improve the durability of highway concrete, freezing rain zone pavement concrete, and coastal zone bridge concrete in extremely cold climates.

The invention discloses a high-conductivity anti-icing lead and a production method thereof, aiming at improving the conductivity and anti-icing ability of cables. The high-conductivity anti-icing lead is provided with a steel strand core; the periphery of the steel strand is concentrically coated with annealed aluminum wires; the cross section of the annealed aluminum wire is in a roofing shape; and short edges are tightly arranged into a coating layer inward. The method comprises the steps of controlling a roofing duralumin mongline, annealing and concentrically stranding. Compared with the prior art, the invention has a conductivity of 63 percent IACS, can greatly reduce power consumption of lines compared with ordinary steel core aluminum wires and improves the conductivity by over 3.3 percent; the roofing annealed aluminum wire has compact structure and little clearance between the aluminum wire strands, is unlikely to be condensed on the surface of the lead during snowing and freezing rain, has an operational temperature 30 DEG C higher than the ordinary steel core aluminum wires and has enough de-icing ability; besides, the steel wires in the central layer are less likely to be polluted by rain or corrosion environment and the lead has longer service life.

The invention discloses a fault probability online evaluation method of power transmission line faults caused by freezing rain, and belongs to the technical field of electric power systems and automation. The method includes the steps that according to space-time evolution of freezing rain disasters, loads borne by lines and towers and flashover voltages borne by insulators are evaluated dynamically, the fault probability of the power transmission lines coated with ice is calculated, and expected risk equipment sets are provided for blackout defense systems. In the method, consideration is given to various fault ways when the power transmission lines are damaged by coated ice, and the method conforms to the mechanism that the coated ice triggers the line faults and is good in practicability and adaptability.

The invention discloses a freezing rain resistant insulator, which relates to a facility that is used for transmitting high-voltage electricity and can resist freezing rain. The insulator is characterized in that a positive temperature coefficient thermistor material with heat sensitive protecting temperature of 5 DEG C- 15 DEG C is chosen as a PTC coating (7) according to the surface heat situation of the PTC coating or the size of the leakage current of the insulator in freezing rain, the thermistor material is PTC ceramic material commercially available, the PTC coating (7) is covered on the upper and the lower surfaces of the insulating part (4) of the insulator, and the thickness of the PTC coating decrease gradually from the interior to the exterior along the radius of the insulating part (4) with a variation range of 0.25-0.05mm; an insulating ceramic coating (9) is covered outside the PTC coating (7) equally so as to control the surface heat or leakage current of the insulator in freezing rain and become the insulator that can resist freezing rain. The insulator has the advantages of simple process and low cost and no freezing happening on the surface of the insulator, thereby the loss of electric power system caused by freezing rain is prevented.

The invention discloses a power frequency online anti-icing and de-icing method for a power transmission line, which comprises the steps which are as follows: three sets of dynamic reactive power compensation devices are connected with a power transmission line between a left side electric power substation and a right electric power substation which are adjacent; a temperature sensor is arranged on the power transmission line; when the temperature detected by the temperature sensor is lower than 0 DEG C, a controller controls the three sets of dynamic reactive power compensation devices into an anti-icing and de-icing working state; the reactive power compensation device at the left side generates a capacitive reactive current; the dynamic reactive power compensation device at the right side generates a capacitive reactive current; and the dynamic reactive power compensation device in the middle generates an inductive reactive current. The power frequency online anti-icing and de-icing method for the power transmission line can automatically implement anti-icing and de-icing under the conditions that the line is not stopped and the power supply is not influenced, guarantees the line from icing, guarantees the stability and safety of a power supply system under extreme disaster weather conditions such as freezing rain, ice and snow, and improves the running economical efficiency of the power system.

The invention discloses a thin slurry mixture paved on a thin-layer cover on an ice and snow melting micro-surface and a paving method. The thin slurry mixture comprises the following components in parts by mass: 100 parts of aggregates, 14-16 parts of ice and snow melting modified emulsified asphalt, 1-3 parts of cement, 0.5-0.8 part of auxiliaries and 7-13 parts of water. The thin slurry mixture paved on the thin-layer cover on the ice and snow melting micro-surface and the paving method have the advantages that a road can have an active snow melting function; the thin slurry mixture can be paved on the surface of a road, a pavement and a bridge deck pavement and can not cause any affect to the traditional construction equipment of a paving machine on the micro-surface and a construction process; the popularization and application of a maintenance process or thin-layer cover process can be accelerated; and the thin slurry mixture is suitable for both northern areas where ice and snow frequently take place and southern areas where freezing rain and freezing ice frequently take place.

A method of removing accumulated frozen rain/ice/snow from a metal roof. The method comprising the steps of inducing vibration into the metal roof, via at least one vibration imparting member attached to the metal roof, to break up the frozen rain/ice/snow accumulated on the metal roof and separate the frozen rain/ice/snow from the metal roof; and allowing the frozen rain/ice/snow to slide off the metal roof under an effect of gravity.

The invention discloses an intelligent site selection system for a highway meteorological observation station under complex terrain. An analysis platform comprises a user interaction unit, a data acquisition unit, a road meteorological disaster risk assessment model unit, a space analysis unit and a big data calculation and site selection model unit. An artificial intelligence analysis technologyis used as a tool; natural attributes such as long downhill, curvature, tunnel, bridge and the like of the road are comprehensively considered. Meanwhile, meteorological disaster risks of heavy rainfall, low visibility, strong wind, freezing rain and snow and the like and actual road disasters and hidden danger factors such as road traffic accidents, agglomerate fog-prone sections and accumulatedsnow-prone sections are also considered; under the combined action of related software, scientific site selection of the meteorological observation station can be carried out through a spatial data platform and an artificial intelligence algorithm provided based on a GIS, the obtained construction site selection of the road meteorological observation station is more standard and effective, and therefore powerful scientific and technical support is provided for highway meteorological observation station network construction in China in future. Based on the method, the method has a good prospect.

The invention provides an online icing-prevention and snow-coverage-prevention method for an electric transmission line by utilizing separate-excitation resonance. The method is implemented by jointly utilizing an icing-prevention and snow-coverage-prevention terminal device and a monitoring center which are arranged on the line. According to the working principle, the icing-prevention and snow-coverage-prevention terminal device arranged on the electric transmission line monitors environmental parameters online, when freezing rain or snowing is judged to happen, the icing-prevention and snow-coverage-prevention terminal device automatically runs, mechanical vibration the same as the fixed frequency value of the electric transmission line is generated to be used as an externally-added excitation source, the externally-added excitation source and the electric transmission line generate resonance, the electric transmission line is prevented from being frozen or covered by snow, and the online ice and snow prevention function of the electric transmission line is achieved. The icing-prevention and snow-coverage-prevention terminal device and the monitoring center can in real-time remote communication and perform real-time feedback, and early warning is performed on the nearby area with no icing-prevention and snow-coverage-prevention terminal device. According to the method, various power grid accidents caused by icing of the electric transmission line can be effectively avoided, and the new idea that passive deicing is changed into active ice prevention is provided for a power system.

A novel auxiliary heating lead which is made from a conducting polyester fiber which can generate low-temperature infrared heat and an ordinary ground wire are combined, and a high-heat conducting insulating material serves as a protecting sleeve of the auxiliary heating lead and is interwoven in the center of a stranded steel wire to form a whole. In the weather of low-temperature freezing rain, ice is probably coated on the ground wire, or when the coated ice is required to be automatically removed, an auxiliary power supply is loaded to the auxiliary heating lead, voltage difference is generated between the auxiliary heating lead and the stranded steel wire, and after a switch K is turned off, the auxiliary heating lead generates the low-temperature infrared heat, the temperature of the stranded steel wire is increased, and the aim of preventing or automatically removing ice is fulfilled.

The invention discloses an ice accretion and freezing rain vibration comprehensive test system. The system comprises a first comprehensive environment test box for supplying the test spraying water at a test requirement temperature to a test piece, and a second comprehensive environment test box for supplying an environment temperature required by the test to the test piece. A water storage container is arranged in the first comprehensive environment test box. A temperature sensor is arranged in the water storage container. A rain spraying nozzle is arranged in the second comprehensive environment test box. The second comprehensive environment test box is installed on a vibration table for applying a vibration stress to the test piece. The rain spraying nozzle is connected with the water storage container through a water pipeline. From the outlet of a high-pressure water pump, a first pressure gauge, a water flow adjusting valve, a flow meter, a one-way valve and a second pressure gauge are sequentially arranged on the water pipeline. The pipeline section of the water pipeline, between the one-way valve and the second pressure gauge, is connected with a water-gas mixing valve for introducing the compressed air. The ice accretion and freezing rain vibration comprehensive test system is convenient in operation, simple in structure and good in test effect.

The Aircraft & motor vehicle protection system invention eliminates the safety and environmental hazards associated with the safety and environmental elements such as (1) sun, (2) heat, (3) thunderstorms, (4) hail, (5) rain & fuel contamination, (6) bird and animal nesting and droppings, (7) freezing rain, (8) frost, (9) ice, (10) snow, and (11) extreme cold that are possibly introduced to aircraft and ground vehicles parked or tied down and exposed to the elements and animals. The invention, which utilizes inflatable/deflatable modules to form the complete system, with multiple layers of protection, with each layer eliminating one or more of the eleven hazards, ensures the elimination of the hazardous concerns associated with parked aircraft increases the percentages for safe flight, reduces the opportunity for damage to the aircraft and assists in maintaining the value of the aircraft. This invention also provides the protection for ground vehicles.

The invention relates to a photo-thermal low-temperature anti-icing pasting pad. The pasting pad comprises a functional film layer and a viscose layer, wherein the functional film layer comprises a base film, a photo-thermal layer, a self-repairing super-hydrophobic layer and a silver nanowire layer; the photo-thermal layer is arranged on the base film, the self-repairing super-hydrophobic layer is arranged on the photo-thermal layer, and the silver nanowire layer is arranged on the self-repairing super-hydrophobic layer. According to the photo-thermal low-temperature anti-icing pasting pad, the anti-freezing protection of outdoor running equipment and instruments can be realized, and the rapid deicing of the surface after the attacking of ice, snow and freezing rain can be realized.

The present invention provides an electric power transmission line which can prevent the ice rain and the freezing of the dissolved snow. An electric heating line is arranged when the electric power transmission line (mainly the aluminum stranded wire and the aluminum cable steel reinforced and the like for overhead electric power transmission) is produced. The electric heating line coats the organic composite material which has excellent electric insulating property and high thermal conduction coefficient for replacing one or a plurality of steel wires in the aluminum cable steel reinforced and using as a bearing wire. In the normal meteorological condition, the electric heating wire has the advantages of non-conducting, no working, no effect to the operating efficiency of the electric network, no increasing the loss of the system and functioning for bearing the steel wire in the aluminum cable steel reinforced. When the heavy weathers of ice rain, snowstorm and the like occur and the electric network line is generated with ice rain, dissolve-snow freezing, the power transmission line has the advantages of supplying power for the electric heating line, providing heat to the electric transmission line through the electric heating wire, sustaining the surface temperature of the electric power transmission line above zero, melting the ice bear by the electric power transmission line, preventing the refreezing of the ice rain and the dissolved snow on the electric power transmission line and preventing the generation of the overloading accident of the circuit bearing ice. In this way, though the electric power loss of the electric network in the heavy weathers of ice rain, snowstorm and the like is increased, the safety of the electric facility is guaranteed. The normal operation of the electric facility in heavy meteorological condition is guaranteed.

The invention discloses a power photovoltaic power generation maintenance device. The power photovoltaic power generation maintenance device comprises a plurality of first support plates and also comprises two second support plates, wherein the plurality of first support plates are sequentially arranged, first installation plates are arranged at upper end surfaces of the first support plates, second installation plates are arranged on the second support plates, the power photovoltaic power generation maintenance device also comprises a power mechanism, the power mechanism is arranged below thefirst installation plates, a water control box and an electric control box are arranged on bottom end surfaces of the second installation plates, and the power photovoltaic power generation maintenance device also comprises a cleaning assembly and a water supply source. By the power photovoltaic power generation maintenance device, the site condition can be comprehensively understood, an ice layer on a surface of a photovoltaic panel caused by freezing rain and heavy snowfall can be rapidly cleared in an all-weather way according to the site condition, foreign matters such as dust, impurity and guano on the surface of the photovoltaic panel also can be rapidly cleared, and the power photovoltaic power generation maintenance device is high in washing efficiency and is capable of automatically controlling.

The invention relates to a cable robot driving carrier. A present cable robot driving carrier needs to be installed at a high altitude by workers, if meeting meteorological disasters of ice rain and the like, high altitude installation is more dangerous, and a plurality of driving carriers can not be used universally and are not suitable for single field operation. The cable robot driving carrier comprises a rack (1) which is installed with a walking auxiliary wheel (2) and is connected with an installation rope (3). A dismounting compound rod (4) is connected to the rack through a hinge. A torsion spring (5) is connected between the dismounting compound rod and the rack. The dismounting compound rod connects with a dismounting rope (6). A lower part of the rack connects with a driving motor (7). A power output shaft of the driving motor connects with a worm (8). The worm connects with a worm gear (9). The worm gear is installed on a driving shaft (10) which is connected with a rod chain combination. The cable robot driving carrier is used for a cable driving carrier.

The invention discloses protective equipment having a function of preventing outdoor equipment from being frozen. A netlike structure with toughness and appropriate rigidity at a low temperature is fixedly arranged on the top of outdoor electric equipment which requires freezing protection, and is called anti-freezing net. The working principle of the protective equipment is that: in case of ice rain and snow, the anti-freezing net is frozen firstly to form an ice cap, so that the open electric equipment below is shielded and is prevented from being affected by a freezing disaster. The netlike structure is designed to reduce wind resistance and prevent heavy wind disasters. Specific to mountain areas with small wind power and rainy regions, the netlike structure is designed into a layer-after-layer structure which is similar to multiple eaves, so that certain rainstorm resistance is enhanced. Due to the adoption of the protective equipment, the electric performance of the electric equipment can be protected on disastrous weathers, power accidents caused by equipment insulation are reduced, and the safety of an outdoor electric system can be enhanced remarkably.

The invention discloses an anti-freeze rain gauge based on infrared distance measurement and a control method. A shell is internally provided with a water container and a measuring cylinder. An intakepipe leading to the measuring cylinder is arranged at the bottom of the water container, and the intake pipe is equipped with a first solenoid valve. A drainage pipe is arranged at the bottom of themeasuring cylinder, and the drainage pipe is equipped with a second solenoid valve. Heating devices are arranged at the bottoms of the water container and the measuring cylinder and on the water intake pipe and the drainage pipe respectively. Temperature sensors are arranged at the water container and at the measuring cylinder respectively. A foam floating plate is arranged in the measuring cylinder, and an infrared distance sensor is arranged on the top. The rain gauge further includes a control unit. The temperature sensors and the infrared distance sensor transmit the collected data to thecontrol unit. The control unit controls the on-off of the heating devices and the two solenoid valves, and obtains rainfall information according to the data collected by the infrared distance sensorand sends the rainfall information to a monitoring center. The problem of rain gauge failure caused by rainwater freezing at temperature below 0 DEG C is solved. Remote monitoring of rainfall is realized. Data support is provided for geological disaster preventing or warning.

The invention provides a gas flow regulating device for an icing-freezing rain test system; the device comprises a one-to-more gas supply communicator, a more-in-one gas supply communicator, a plurality of gas supply branch pipes and a plurality of gas supply branch switches; the one-to-more gas supply communicator is connected to a gas inlet of a gas supply pipe of the icing-freezing rain test system; the more-in-one gas supply communicator is connected to a gas outlet of the gas supply pipe of the icing-freezing rain test system; the gas supply branch pipes are parallelly connected between the one-to-more gas supply communicator and the more-in-one gas supply communicator; each gas supply branch switch is arranged on each gas supply branch pipe and is respectively used for controlling the on/off of each gas supply branch pipe, wherein the gas which is led in from the gas inlet of the gas supply pipe is shunted into the gas supply branch pipes through the one-to-more gas supply communicator; the gas in the gas supply branch pipes is collected into the more-in-one gas supply communicator and then is led to a plurality of spray nozzles of the icing-freezing rain test system through the gas outlet of the gas supply pipe; the gas is mixed with the sprayed water which is supplied to the spray nozzles, so that the water sprayed by the spray nozzles is atomized, and a tested sample is sprayed.