30results about How to "Anti-pollution flashover" patented technology

The invention relates to a coating method for a wire or an electrical insulator with a teflon coating, which relates to the technical field of transmission lines. The coating method for the electrical insulator (3) comprises the steps of degreasing, sand-blasting treatment, coating, drying and sintering. The coating method for the wire (1) comprises the steps of degreasing, coating adhesives and spraying the coatings. As the teflon has inadhesion property and moisture resistance, the aim of preventing serious icing can be fulfilled by spraying the teflon on the outsides of the wire and the electrical insulator, and the aim of preventing the pollution flashover can be fulfilled by spraying the teflon on the outside of the electrical insulator. As the teflon coating film has excellent heat resistance and low temperature resistance, the wire or electrical insulator sprayed with the teflon can work normally in a high-temperature environment in summer or a low-temperature environment in winter.

The invention provides a 220 KV and below 220 KV electric transmission line insulator electrification water washing method. The method mainly comprises the steps of setting the water resistivity of water and adjusting pressure of a hydraulic giant; judging the wind direction and wind power on a tower and adjusting the length of a water column according to the wind direction and the wind power; placing the hydraulic giant at a given position and washing triphase insulators of 220 KV and below 220 KV electric transmission lines in sequence from bottom to top; washing insulator chains on the downwind side firstly and then washing insulator chains on the weather side during insulator chain washing, and washing piece by piece from bottom to top and washing by starting from the wire side in sequence for suspension insulator chains; and judging whether phenomena of sewage dripping and partial arcing striking appear for washed insulators, and rewashing corresponding insulators if the phenomena appear. The 220 KV and below 220 KV electric transmission line insulator electrification water washing method enables electrification water washing to be achievable for most of the 220 KV and below 220 KV electric transmission lines, line outrage is reduced, pollution flashover is avoided, safety and stability of power grids are ensured, and good economic and social benefits are created.

The invention relates to anti-fouling super-hydrophobic self-cleaning paint and a preparation method thereof. The anti-fouling super-hydrophobic self-cleaning paint is characterized by being composed of silicone glass cement, polyvinylidene fluoride powder particles, photocatalyst, arc-proof agent and organic solvent, wherein the silicone glass cement is 5-20wt% of the organic solvent, the polyvinylidene fluoride powder particles is 10-50wt% of the silicone glass cement, the photocatalyst is 10-50wt% of the silicone glass cement, and the arc-proof agent is 5-20wt% of the silicone glass cement. By adoption of the anti-fouling super-hydrophobic self-cleaning paint, a surface contact angle of a coating is larger than 150 degrees, excellent insulativity is achieved, and breakdown voltage is larger than 15kV/mm.

The invention discloses a ceramic material preventing high voltage line surface corona discharge and pollution flashover. The ceramic material consists of TiO2 and auxiliary material Y2O3, wherein TiO2 includes rutile phase TiO2 and anatase phase TiO2. The invention also discloses a spraying method of the ceramic material. Firstly, a mechanical powder mixer is used to mix the abovementioned weighed components uniformly to obtain ceramic material powder; and then plasma spraying equipment is adopted to spray the ceramic material powder to the surface of an aluminium power transmission line subjected to sand blasting, and cooling is performed. The ceramic material uses TiO2 powder of different crystal forms as raw materials, adopts a mechanical mixing method to prepare ceramic material powder, then plasma spraying is performed on the surface of the aluminium power transmission line to prepare a functional type TiO2 coating, the thickness of the coating is 0.1 to 0.2 mm, and the coating has the advantages of having good surface wetability and high insulating performance, and enabling the power line to have photocatalytic performance and other advantages in a power transmission process, and high voltage line surface corona discharge and pollution flashover discharge can be prevented.

The invention discloses an automatic cleaning device for a contact net insulator. The automatic cleaning device comprises an underframe, a support plate, a linear sliding mechanism, a slewing mechanism, a turnover mechanism and a cleaning mechanism. The underframe is of a rectangular frame structure. The support plate is installed on the inner side of the underframe by means of the linear sliding mechanism. The slewing mechanism is fixedly installed on the upper surface of the support plate. A slewing disc is installed at the action end of the slewing mechanism. The cleaning mechanism is installed on the slewing disc through a support. The turnover mechanism is installed between the support and the slewing disc. The cleaning mechanism is installed on the underframe by means of the slewing mechanism and the linear sliding mechanism, thus automatic cleaning device is in match usage with an existing railway operation vehicle, the surface of the insulator can be cleaned during advancing, an operator does not need to be close to the insulator, the operation safety and operation efficiency are improved, flashover of the insulator is avoided effectively, and normal operation of a contact net is ensured.

The invention provides an anti-icing voltage-sharing plate. The anti-icing voltage-sharing plate is composed of a bowl-shaped cover body (1) and an umbrella cover-shaped disk (2), wherein the umbrella cover-shaped disk is provided with center holes. The cover body is fixedly connected with the center holes of the disk (2) through a cover opening of the cover body in a butt joint mode. The disk (2) is provided with an umbrella cover-shaped disk body (21). The edge of The disk body (21) is a circular body (22). Drain holes (23) are formed in the edge of the disk body (21) inside the circular body (22). Lower edged drain holes (24) are formed in the lower surface of the circular body (22). The anti-icing voltage-sharing plate has the advantages that icing coating time can be delayed to more than 10-15 times to increase the icing flashover voltage by 18%-25% in the area which electric transmission line are polluted heavily; rain flashover caused by rain curtains formed by the pollutants of the top of the tower can be avoided; pollution flashover caused by bird droppings can be avoided; thunderstrike flashover voltage can be enhanced; the sizes of the windows of towers and line corridors can be decreased and investment can be saved.

The invention discloses a power transmission line insulator distributed leakage current monitoring device characterized in that the power transmission line insulator distributed leakage current monitoring device comprises several monitoring rings and a communication station; the monitoring rings carry out communication with the communication station through wireless communication; the monitoring rings sleeve steel caps of the upper surfaces of power transmission line insulators; insulating parts are arranged below the steel caps; the communication station is arranged between power transmission line towers which are provided with the monitoring rings; and the monitoring rings are used for recording amplitudes of leakage currents of the insulators and transmit information about the amplitudes of leakage currents of the insulators to the communication station through wireless communication. The communication station is used for controlling the monitoring rings, and transmits information about the amplitudes of leakage currents of the insulators to a remote terminal after gathering so as to motor the states of the insulators at any time. According to the invention, pollution degrees of the insulators are monitored by means of monitoring the insulator leakage currents to carry out pollution flashover early warning to further avoid occurrence of pollution flashover of the power transmission line insulators and guarantee safe and stable operation of an electric power system.

The invention relates to a high-voltage electric transmission line pollution-flashover-preventing technology, in particular to an insulation cleaning agent electrified cleaning method for a 500 kV electric transmission line tension insulator string. The insulation cleaning agent electrified cleaning method comprises the steps that a 500 kV electric transmission line insulation cleaning agent electrified cleaning device is connected to the ground, and the pumping pressure is set on a high-voltage cleaning machine; a cleaning rod is connected with the high-voltage cleaning machine, and the cleaning rod is reliably connected to the ground; the cleaning rod is adjusted to enable jet nozzles inside an arc-shaped insulation hood to align at insulators needing to be cleaned; cleaning is conductedfor a round trip at a constant speed from the high-voltage side to the low-voltage side of the insulator string, and the cleaning rod is manipulated to enable the arc-shaped insulation hood to slideon the insulator string; the cleaning rod is quickly rotated during cleaning, thus liquid columns sweep back and forth on the left sides and the right sides of the insulators, and if the abnormal electric discharge phenomenon exists in the cleaning process, cleaning needs to be instantly stopped; and the washing time of one single piece of insulator is 4-6 s and is determined according to the pollution degree. According to the insulation cleaning agent electrified cleaning method, insulation cleaning agent electrified cleaning can be conducted on the 500 kV electric transmission line tension-resistant insulator string, pollution flashover is avoided, and safety and stability of a power grid are guaranteed.

The invention relates to the technical field of direct-current power supplies, in particular to a high-voltage direct-current power supply which comprises a cabinet body. A cabinet door is rotationally connected to one side of the outer surface of the front end of the cabinet body, a direct-current power supply is fixedly installed at the upper end of the inner wall of the cabinet body, and a fixed base is fixedly connected to the position, close to the lower end, of the outer surface of one side of the direct-current power supply. A sealing plate is fixedly connected to the position, close to the fixing base, of the outer surface of one side of the direct-current power source, a fixing block is fixedly connected to the position, close to the lower end, of the outer surface of one end of the fixing base, and a plurality of grooves are evenly formed in the outer surface of the upper end of the fixing base. According to the invention, a wiring part is covered by an anti-loosening cover, so that the problem of upward movement of a square nut is avoided, and a wire at the power supply wiring part is stabilized; in addition, the anti-loosening cover can also prevent dust from falling at the wiring part, so that the problem of pollution flashover at the contact part is avoided; and meanwhile, the problem of electric spark of the wire at the wiring part is also avoided, and thus, the problem of fire disasters is avoided.

A composite suspension insulator comprises a flange and an umbrella-type skirt edge. The flange is provided with a line pressing seat. The line pressing seat is provided with a line pressing groove. The line pressing seat is fixed together through a bolt. The flange is arranged on an insulating rod. The insulating rod is provided with the umbrella-type skirt edge. A bottom of the insulating rod is provided with a metal plate. The metal plate is provided with wiring holes. The line pressing seat is formed by an upper clamping plate and a lower clamping plate. The umbrella-type skirt edge is made of rubber. A surface of the insulator is coated with a layer of anti-pollution flashover paint. There are four wiring holes. The insulating rod is provided with the umbrella-type skirt edge and the surface of the insulator is coated with a layer of anti-pollution flashover paint so that hydrophobic migration performance is increased, an insulation level is enhanced and generation of pollution flashover can be effectively prevented. Because of the anti-pollution flashover paint arranged on the surface, a pollution flashover problem caused by atmosphere pollution can be effectively prevented. Corrosion resistance performance and aging resistance performance are possessed. And an insulating property is good.

The invention relates to a combined anti-pollution flashover insulator. The combined anti-pollution flashover insulator includes an umbrella-shaped insulator assembly and metal bases; the umbrella-shaped insulator assembly is divided into an upper part and a lower part, wherein the upper part is set in a manner that two insulators are connected onto a rectangular metal seat, and the lower part is set in a manner that one insulator is connected onto a triangular metal seat; the insulator of the lower part is connected with the rectangular metal seat; the surface layers of the insulators are provided with a layer of anti-pollution flashover paint; electroceramic sealing silicone rubber is adopted as an adhesive; the anti-pollution flashover paint is room temperature vulcanized silicone rubber; the thickness of the anti-pollution flashover paint ranges from 0.1 to 1 mm; the two insulators of the upper part are arranged at two sides of the rectangular metal seat; the top of the insulator of the lower part is connected with the middle of the rectangular metal seat, and therefore, the hydrophobic migration performance of the combined insulator can be improved, insulation level can be increased, and pollution flashover can be effectively prevented; and the surfaces of the insulators are provided with the anti-pollution flashover paint, and therefore, the problem of pollution flashover caused by air pollution can be effectively prevented.