77results about How to "Improve ice melting efficiency" patented technology

The invention discloses an ice melting system for a circuit of a power distribution network and an ice melting method of an ice melting system. The system comprises a main line fixed AC ice melting unit, a long branch mobile DC ice melting unit and a short branch portable DC ice melting unit, wherein the main line fixed AC ice melting unit comprises an ice melting switch, an ice melting protection device and a fixed ice melting voltage output device, the long branch mobile DC ice melting unit comprises a mobile ice melting power generation device and a first ice melting rectification device which are connected with each other, and the short branch portable DC ice melting unit comprises a portable ice melting power generation device and a second ice melting rectification device which are connected with each other. The method comprises the step of performing AC ice melting or DC ice melting by selecting different ice melting units according to ice coating conditions and circuit types. Designs are performed according to a main line, a long branch and a short branch, ice melting of all circuits of the power distribution network is covered, the ice melting efficiency of the circuit of the power distribution network can be improved, the ice melting range is expanded, and the capability of resisting rain and snow disaster in a large range by the circuit of the power distribution network is improved.

The invention relates to a high voltage high powder double-tuned method for electric deicing of an overhead power transmission line, comprising the following steps: a second inductor (L2) and a second capacitor (C2) are connected in parallel to form a resonant circuit; then a first resonance capacitor (C1) and the resonant circuit are connected in series between a line deicing power source (E) and an overhead power transmission line (1) to form a double-tuned line electric deicing heating loop; the line deicing power source (E) outputs high frequency voltage with two different frequencies to cause the double-tuned electric deicing heating loop to generate high frequency resonance current with two different frequencies to form two purely resistive resonance electric deicing heating loops; and the electric heating line realizes fast deicing and maximizes the capacity of the line deicing power source (E).The method of the invention has the advantages of high deicing efficiency, fast deicing and capacity of maximizing capacity of a high voltage high powder power electronic frequency conversion resonance device, thus being suitable for deicing the single phase and triphase transmission line and enjoying strong enablement.

The invention provides a railway tunnel vault deicing device, and relates to the technical field of railway transportation. The railway tunnel vault deicing device comprises connecting parts, slidingdevices, deicing mechanisms, ice melting mechanisms and rolling wheels; the ice melting mechanisms are arranged at the top ends and the bottom ends of the connecting parts, cleaned broken ice is melted through the ice melting mechanisms, and the ice melting mechanisms are fixedly connected with the top ends and the bottom ends of the connecting parts; the deicing mechanisms are arranged between the connecting parts, and the deicing mechanisms are used for removing ice columns on a vault and ice on the surface of the vault; the left end and the right end of each deicing mechanism are fixedly connected with the corresponding connecting part; sliding devices are arranged at the bottom ends of the deicing mechanism so that the deicing mechanisms can be conveniently attached to the vault to remove ice; and the top ends of the sliding devices are in sliding connection with the top ends of the deicing mechanisms, the rolling wheels are arranged at the bottom ends of the sliding devices, and the rolling wheels penetrate through the bottom ends of the sliding devices to be rotationally connected with the bottom ends of the sliding devices. The problem that ice on the surface of the vault cannot be removed when the vault is deiced so as to cause secondary icing easily is solved.

The invention discloses a phytotron de-icing test platform for extra-high voltage divided conductors. The phytotron de-icing test platform comprises a master control device, a super-current generation device, a super-current measurement device, a first super-current soft connection body, a second super-current soft connection body, a first divided conductor conversion device, a second divided conductor conversion device, a first distributive stress regulation and detection device, a second distributive stress regulation and detection device, a full-insulated test pedestal, a distributive environment parameter control system, an icing and de-icing observation device and a high-span closed chamber. The phytotron de-icing test platform has the advantages of being capable of simulating actual de-icing features of the extra-high voltage divided conductors under various environment conditions, researching de-icing current-time curves of the extra-high voltage divided conductors under various environment conditions, simulating icing features of the extra-high voltage divided conductors under various environment conditions and researching icing mechanisms of circuits and simulating stress conditions of the extra-high voltage divided conductors in the icing process and the de-icing process to obtain stress change curves of the conductors.

The invention provides an icing monitoring and ice melting integrated system based on an optical fiber grating and graphene thin film, and relates to an icing monitoring and ice melting integrated system. The icing monitoring and ice melting integrated system aims at solving the problems in an existing ice testing and ice melting technology that the icing process and the ice melting process cannotbe monitored synchronously, an existing ice testing and ice melting device is limited by the environment, and the detection result is low in accuracy. The system is constituted by ice testing and icemelting composite film, an optical fiber grating sensing demodulator, a composite film input power source and a computer; the ice testing and ice melting composite film is constituted by an optical fiber Bragg grating sensing belt, the graphene thin film, upper layer polyethylene terephthalate film, lower layer polyethylene terephthalate film and a plastic casing pipe; the optical fiber Bragg grating sensing belt cascaded by multiple optical fiber Bragg sensors. The system can achieve the process of monitoring icing and ice melting synchronously and is flexible in arrangement, high in accuracy and high in efficiency.

The invention discloses a method for melting ice and snow of a transmission line. Piezoresistors, a direct current ice and snow melting device and a plurality of short circuit wires are included, the piezoresistors are installed between a ground wire and a tower in a transmission line section that needs ice and snow melting and between the ground wire of the transmission line section that needs ice melting and a ground wire of another section, the short circuit wires are used for connecting the transmission line after a power cut and a ground wire of a line selection section, and two poles of the direct current ice and snow melting device are connected two phases of the transmission line. After ice melting work is completed, semi-insulating transformation facilities do not need to be dismantled, thereby facilitating ice melting operation of the next time, and thus the method for melting ice and snow of the transmission line is extremely low in cost, the workload of ice melting is greatly reduced, and the ice melting efficiency is improved.

The invention discloses a power transmission line ice-melting decision method based on a shortest path algorithm and 0/1 decision. The method comprises the following steps: 1) dividing an icing line area; 2) calculating ice-melting time of each team for a single icing line; 3) calculating required time from each team to each substation of the icing area; 4) calculating required time from one substation to another substation in the same icing area of each team; 5) calculating the shortest ice-melting time of each team in all icing lines of the icing area; 6) establishing a power transmission line shortest ice-melting time decision-making model; and 7) calculating the shortest ice-melting time and outputting an ice-melting decision scheme. The power transmission line ice-melting decision method can quickly and effectively make a full-network icing line decision-making method, so that ice-melting time is reduced, and operability is high; and the problems that a power transmission line ice-melting decision is mainly made by human experience, and the decision-making time is long and risk of decision making is large under the conditions of multi-lines and complex working condition are solved.

The invention discloses a direct current ice-melting short-circuit control structure. The direct current ice-melting short-circuit control structure comprises an iron tower and three power transmission lines. The three transmission lines are suspended on the iron tower through insulator strings, and cable down leads are connected to the lower parts of the power transmission lines. Horizontal protective insulators are fixedly connected between the cable down leads and the iron tower, and a plurality of porcelain column insulators are fixed to the side edge of the iron tower. Detachable and foldable control levers are movably connected between the iron tower and the bottom ends of the cable down leads, a short-circuit wire fixed to the porcelain column insulators is connected between the three control levers, and a safety distance exists between the short-circuit wire and the iron tower. By arranging the three detachable, foldable and retractable control levers on the iron tower, the control levers are connected by the short-circuit wire, the purpose of being connected or disconnected with the power transmission lines in a short-circuit mode is achieved by the contraction or extension of the control levers, and a good use effect is obtained.

The invention provides a catenary ice-melting system with self-cycling energy. The system comprises N groups of transformation mechanisms, each group of transformation mechanisms comprises a rectifying unit and an energy feed device, and N is an arbitrary integer greater than or equal to 1; the two sides of each rectifying unit are connected to a medium-voltage ring network and a direct-current catenary respectively, and the two sides of each energy feed device are connected to the medium-voltage ring network and the direct-current catenary respectively; in the first state, the rectifying unit of one transformation mechanism, an ice section to be melt of the direct-current catenary, the energy feed device of another transformation mechanism and a corresponding section of the medium-voltage ring network form an energy cycle, and the current value of the ice section to be melt is not lower than a critical ice-melting current value.

The invention relates to an external melting ice storage device capable of automatically adjusting the air blowing amount. The device comprises an ice storage tank, the ice storage tank comprises an air blowing assembly and a liquid level sensor, the air blowing assembly comprises an air transmission main pipe and air transmission branch pipes, the air transmission main pipe is connected with an air compressor, the air compressor comprises an air return pipe, the air return pipe is provided with a pressure sensor, and the air compressor is connected with a frequency converter. The device has the advantages that the liquid level information in the ice storage tank is collected in real time through the liquid level sensor, the pressure change in the air return pipe is collected in real time through the pressure sensor arranged on the air return pipe, the frequency converter receives the information of the liquid level sensor and the pressure sensor at the same time, the rotating speed of the air compressor is comprehensively controlled according to the liquid level height of ice water and the pressure change of the air return pipe, and therefore the air blowing amount of the air blowing assembly is automatically adjusted so as to guarantee that air with enough air amount and certain pressure is blown into the ice water under different ice storage amounts, certain disturbance is formed to the ice water, the ice melting efficiency is improved, and the ice melting time is shortened.

The invention provides an insulator surface online monitoring device, and relates to the technical field of power transmission line cleaning equipment. The insulator surface online monitoring device comprises a movable carrier, a storage bin arranged on the movable carrier, a suspension mechanism arranged on the storage bin, a spraying mechanism arranged on the movable carrier, a monitoring mechanism arranged on the movable carrier and used for monitoring insulators, and a control mechanism arranged on the movable carrier and used for controlling the movable carrier, the suspension mechanism,the monitoring mechanism and the spraying mechanism. The surfaces of the insulators can be monitored one by one in a power transmission line inspection mode in cold weather, and the surfaces of the insulators can be cleaned and monitored while ice melting is carried out on a line; and in addition, an ice melting agent suitable for an ice melting device is provided, has low freezing point, and is high in ice melting speed within a short time, remarkable in ice melting effect and small in damage to carbon steel and plants.

The embodiment of the invention discloses a high-power fiber laser ice melting system, which is applied to ice melting on an overhead line, and is characterized by comprising a laser emitting module,a monitoring module, a distance measurement module, an optical zooming module, a tracking and aiming module and a turntable, wherein the laser emitting module is used for melting the ice coating the overhead line; the monitoring module is used for obtaining monitoring data related to the overhead line at a far end in real time; the distance measurement module is used for generating a distance parameter according to the monitoring data; the optical zooming module is used for adjusting the focal length of the laser emitted by the laser emitting module; the tracking and aiming module is used foradjusting the direction of the laser emitted by the laser emitting module in real time; and the turntable is used for changing the irradiation direction and position of the laser. Through the ice melting system provided by the invention, the ice melting efficiency can be greatly improved, the ice melting cost is reduced, and meanwhile, the working risk of an electric worker is greatly reduced.

The invention discloses a thermal insulation de-icing barrel for a vehicular water dispenser. The thermal insulation de-icing barrel comprises a water storage barrel, a water pipe, an air pipe, an electric heating wire and a circuit mainboard. The water pipe reaches the bottom of the water storage barrel, the air pipe is positioned at the top of the water storage barrel, and the outer end of the air pipe is communicated with the outside. The electric heating wire penetrates through the water pipe to directly reach the bottom of the pipe, is then bent from the bottom of the pipe to return to the top of the water storage barrel and finally penetrates outwards from the side wall of the water pipe to enter the air pipe. The circuit mainboard is arranged in a barrel cover and provided with two power interfaces and two transmission interfaces, and power lines and transmission lines are connected to the power interfaces and the transmission interfaces respectively. A high water level probe, a low water level probe, a water quality monitor, a water level common terminal and a barrel internal temperature sensor are arranged in the water storage barrel, a barrel external temperature sensor is arranged outside the water storage barrel, and the high water level probe, the low water level probe, the water quality monitor, the water level common terminal, the barrel internal temperature sensor and the barrel external temperature sensor are connected with the circuit mainboard through corresponding interfaces of the circuit mainboard. The water storage barrel is high in de-icing efficiency and great in thermal insulation effect, ice cubes can be added into the barrel in summer to realize supplying of icy water, and the electric heating wire can be electrified in summer to quickly deice so as to realize supplying of hot water through heating with the water dispenser.

The invention discloses a heat-collecting de-icing device and method for an ice-coating power transformation device. The heat-collecting de-icing device comprises a plurality of light-gathering units; each light-gathering unit comprises a parabolic reflector and an infrared lamp; the infrared lamp is arranged on the focus of the parabolic reflector; light of the infrared lamp is reflected by the parabolic reflector to form a collimated light beam; several light-gathering units are configured in a way that several light-gathering units are installed on the internal surface of an internal fixed paraboloid dispersedly, the light beam emitted by each light-gathering unit is perpendicular to the tangent plane of the internal fixed paraboloid on the corresponding mounting point; the focal length b of the internal fixed paraboloid is larger than the safe distance when ice is melt; the ice-coating power transformation device is arranged on the focus of the internal fixed paraboloid; and therefore light of the light-gathering units are gathered to the focus of the internal fixed paraboloid, and safe ice melting can be carried out to the ice-coating power transformation device arranged on the focus. According to the invention, energy loss can be greatly reduced, and the ice-melting efficiency is improved.

The invention discloses a wind power blade deicing system and method based on an unmanned aerial vehicle. The unmanned aerial vehicle can be flexibly operated, and the wind power blade is comprehensively shot through the infrared camera, so that the freezing point is found. An RTK positioning system accurately positions and records coordinate information of a freezing point of the wind power blade, the omnidirectional radar system can control the unmanned aerial vehicle to hover near the freezing point, the safe distance between the unmanned aerial vehicle and the wind power blade is 2.5 m, and damage to the wind power blade due to shaking of the unmanned aerial vehicle is avoided; the steering engine can adjust the directions of the sprayer and the nozzle to ensure the spraying accuracy; An FPV camera shoots the ice melting and removing process in the whole process and transmits the image to the operating handle screen in real time, so that the ice removing and cleaning process is timely and efficient; A ground system can provide power guarantee and signal guarantee for the mooring unmanned aerial vehicle, and the unmanned aerial vehicle can execute a deicing task in a high-altitude long-endurance and high-response mode.

The invention discloses an environment-friendly ice melting agent prepared by using waste acetic acid produced in dimethyl phthalate production and a preparation method thereof. The environment-friendly ice melting agent is a liquid product, wherein the total mass percent of acetate is 10-40%, the total mass percent of sodium dihydrogen phosphate is 0.05-1%, the total mass percent of sodium silicate is 0.05-1%, the total mass percent of sodium tartrate is 0.01-0.05%, and the 0.001-0.5wt% pigment can be added in the product. The production process is simple and mainly comprises strong alkali saponification and activated carbon adsorption treatment, the corrosion inhibition component is compounded to realize the comprehensive utilization of waste acetic acid which is hard to treat. The environment-friendly ice melting agent prepared by the invention is free from extraneous odor and low in ice point, the ice melting capacity is more than 150% of that of sodium chloride, the corrosivity to the steel is less than 10% of sodium chloride, and the ice melting agent basically cannot corrode the concrete, the plurality of indexes are superior than those of the common acetate type environment-friendly ice melting product CMA at present.