47results about How to "Increase pollution flashover voltage" patented technology

The invention discloses an anti-icing coating for an insulator. The anti-icing coating consists of a high-resistivity coating and a low-resistivity coating. The high-resistivity coating consists of silicon rubber and carbon black, wherein the weight percentage content of the carbon black is lower than 1 percent; and the high-resistivity coating is coated at the outermost edge of the skirt of the insulator. The low-resistivity coating consists of silicon rubber and carbon black, wherein the weight percentage content of the carbon black is between 10 percent and 30 percent; and the low-resistivity coating is coated on the surface of the insulator except the outermost edge. Two coatings with high resistivity and low resistivity are prepared respectively by adding carbon black into the silicon rubber according to different proportions; the upper surface and the lower surface of the skirt of the insulator are coated with the low-resistivity coating; and the outermost edge of the skirt of the insulator is coated with the high-resistivity coating. By adopting the high-resistivity coating, ice is prevented from growing at the skirt edge by adopting the high-resistivity coating, the flashover voltage is prevented from being lowered by ice bridging, the working stability of the insulator is enhanced, and safe and reliable power transmission is ensured.

The invention relates to an anti-pollution-flashover superhydrophobic paint, and a preparation method and application thereof, belonging to the field of paints. The preparation method comprises the following steps: (1) adding nano silicon dioxide particles into a polydimethylsiloxane-containing organic solvent until the nano silicon dioxide particles are uniformly dispersed, and volatilizing the organic solvent to obtain low-surface-energy nano silicon dioxide particles; and (2) adding the low-surface-energy nano silicon dioxide particles prepared in the step (1) and an adhesive into an organic solvent, and stirring to obtain the anti-pollution-flashover superhydrophobic paint. The method has the advantages of simple technical process, low facility requests, wide raw material sources and low cost. The prepared anti-pollution-flashover superhydrophobic paint has the advantages of excellent hydrophobicity, high aging resistance, favorable self-repair effect, high pollution flashover voltage and the like, and is used for external insulation protection of transmission equipment and transformer equipment in heavy-smog regions.

The invention discloses a 1,200kV extra-high voltage suspension type composite rod insulator, which consists of two insulators, wherein the two insulators are connected in series through connecting fittings, and the highest voltage of each insulator is 1,200kV; each insulator comprises a mandrel, and a sheath and umbrella skirts which are arranged on the mandrel in a sleeving manner; voltage sharing rings are arranged at the two ends of the mandrels; a voltage sharing ring on the wire side is a double-layer voltage sharing ring. According to the 1,200kV extra-high voltage suspension type composite rod insulator, the double-layer voltage sharing ring is arranged on the wire side, and a special umbrella skirt design method is adopted, so that the 1,200kV extra-high voltage suspension type composite rod insulator has the advantages of light weight, strong strength, high hydrophobicity and hydrophobic mobility of a silicon rubber surface, high flashover voltage and the like, and the running requirements of an extra-high voltage power transmission line under extreme climate conditions of high humidity, high temperature and the like can be met.

The invention discloses a glazing process of a semiconductive glaze and the semiconductive glaze used by the glazing process. The process comprises the following steps of: preparing the following components in parts by mass: 20 parts to 30 parts of feldspar powder, 20 parts to 30 parts of quartz powder, 2 parts to 6 parts of calcite, 8 parts to 15 parts of KuanCheng soil, 3 parts to 6 parts of TiO2, 15 parts to 20 parts of Fe2O3 and 1.5 parts to 4.5 parts of Cr2O3 to prepare the semiconductive glaze; cementing a flange plate of a semiconductive glaze blank to the lower edge of the closest umbrella to be covered by a rubber belt, and then spraying a layer of common glaze on the blank by a glaze spraying machine; then taking off the rubber belt and spraying a layer of semiconductive glaze slip on the covered position of the rubber belt; and spraying sand on the cemented position of the flange plate. By utilizing the semiconductive glaze prepared by the process, the original problems of uneven electric field distribution near the flange plate, too large insulation resistance value of porcelain sleeve surface and high local electric discharge index can be overcome.

The invention relates to an outdoor dry-type voltage transformer used for an electric locomotive, which comprises a main body which is composed of an iron core, a primary winding which is sheathed on the iron core, and a secondary winding, a primary terminal connector, a secondary terminal connector, a primary high-voltage insulation column which is sheathed outside of the primary terminal connector, and a base, wherein the main body, the primary terminal connector, the secondary terminal connector and the primary high-voltage insulation column are fixedly installed on the base after integrally adopting epoxide resin and silicon rubber to compositely insulate the secondary terminal connector and the primary high-voltage insulation column into a whole structure, wherein the primary high-voltage insulation column and the main body are in cylindrical shape or ellipsoidal shape, and the connection between the primary high-voltage insulation column and the main body is a spherical surface whose both sides are cut obliquely. The outdoor dry-type voltage transformer can prevent the leakage of oil and the generation of a pollution flashover fault, and the invention has the advantages of stable insulation, fuse protection, long service life, small volume, convenient fixing, high mechanical strength, and wide application.

The invention discloses a cementing type bell-shaped disk-shaped suspension type composite polymer string insulator unit. The polymer string insulator unit comprises a steel cap metal element, a steel foot metal element, an insulating core element and a polymer skirt. A cavity with a U-shaped section is formed in the steel cap metal element, the steel foot metal element is provided with a cone head portion matched with the cavity, the cone head portion of the steel foot metal element is arranged in the cavity of the steel cap metal element, the insulating core element is arranged between the cone head portion and the cavity, the center of the insulating core element is provided with a cementing portion which is a cavity of an inverted cone shape, the bell-shaped polymer skirt wraps the outer surface of the insulating core element, the inner wall of a bell-type body is provided with a plurality of prismatic protrusions coaxial with the insulating core element, the cone head portion of the steel foot metal element is integrated with the cementing portion in a cementing mode through an adhesive, and the cavity of the steel cap metal element is integrated with the cementing portion in a cementing mode through an adhesive. The polymer string insulator unit has the advantages of preventing bird damages, and being resistant to wind and sand, resistant to damages caused by external force and capable of assisting climbing.

The invention discloses a compression connected type double-umbrella-shaped or three-umbrella-shaped disk-shaped suspension-type composite string insulator unit which comprises a core rod, hardware fittings arranged at the two ends of the core rod, and a protective sleeve arranged on the outside of the core rod in a covering mode. A double-umbrella-shaped or three-umbrella-shaped umbrella skirt extending along the circumference direction of the protective sleeve is arranged on the protective sleeve. The hardware fittings are connected to the core rod in a compression mode. Sealing structures are formed on outer surfaces of the hardware fittings after high-temperature solidification. The compression connected type double-umbrella-shaped or three-umbrella-shaped type disk-shaped suspension-type composite string insulator unit has the advantages of preventing bird troubles, resisting to sand blown by wind, resisting to damage by external force and being capable of assisting climbing.

The invention discloses a cementing type composite insulator chain element with a double-umbrella-shaped and three-umbrella-shaped disk suspension type polymer. The element comprises a steel cap fitting, a steel leg fitting, an insulation core part, a polymer protecting sleeve and a polymer umbrella skirt. A cavity with the U-shaped section is formed in the steel cap fitting. The steel leg fitting is provided with a conical head portion matched with the cavity. The conical head portion of the steel leg fitting is arranged in the cavity of the steel cap fitting. The insulation core part is arranged between the conical head portion and the cavity. A cementing part is arranged in the center portion of the insulation core part and is an inverted-cone-shaped cavity. The outer surface of the insulation core part is covered with the polymer protecting sleeve. The outer surface of the polymer protecting sleeve is provided with the polymer umbrella skirt of a double-umbrella-shaped or three-umbrella-shaped structure. The conical head portion of the steel leg fitting and the cementing part are cemented into a whole through adhesive. The cavity of the steel cap fitting and the cementing part are cemented into a whole through the adhesive. The element can prevent bird damage, resist sand wind, prevent external force damage and assist in climbing and treading.

The invention discloses an integrated-molding-type double-umbrella-shaped or three-umbrella-shaped disk-shaped suspension-type polymer insulator string element. The integrated-molding-type double-umbrella-shaped or three-umbrella-shaped disk-shaped suspension-type polymer insulator string element comprises a steel cap fitting, a steel leg fitting and a polymer insulating part, wherein the inner portion of the steep cap fitting is provided with a cavity with a U-shaped cross section, and the steel leg fitting is provided with a conical head portion matched with the cavity; the conical head portion of the steel leg fitting is arranged in the cavity of the steel cap fitting; the disk-shaped polymer insulating part is arranged between the steel cap fitting and the steel leg fitting, the disk-shaped polymer insulating part is formed in one step through an integrated injection or pouring technology, meanwhile, the disk-shaped polymer insulating part, the steel cap fitting and the steel leg fitting are solidified into a whole at high temperature, and the polymer insulating part comprises a shed of a double-umbrella-shaped structure or a three-umbrella-shaped structure. The integrated-molding-type double-umbrella-shaped or three-umbrella-shaped disk-shaped suspension-type polymer insulator string element has the advantages of preventing bird trouble and being resistant to sand, wind and external force destroy and capable of assisting climb and tread.

The invention discloses a high-voltage insulation gas circuit distributor for a high-speed motor train unit. The high-voltage insulation gas circuit distributor comprises a distributor body, an upper-end connecting part, a lower-end connecting part, a gas channel core body and outer insulation umbrella groups, wherein the upper-end connecting part and the lower-end connecting part are arranged at the two ends of the distributor body; the outer insulation umbrella groups are distributed on the periphery end of the distributor and are integrally injection molded with the distributor body; the gas channel core body is arranged at the inner end of the distributor body; each of the port of the upper-end connecting part and the port of the lower-end connecting part is provided with a plurality of gas channels with trapezoidal sealing grooves which enable the gas channel core body to be in close fit with the gas channels of the upper-end and lower-end connecting parts, and enable the gas channels to communicate with the gas channel core body. The high-voltage insulation gas circuit distributor has the following characteristics that the sealing property is good; the distributor is capable of bearing the severe outdoor conditions, such as acute radiation of ultraviolet rays, salt mist, fine sand flying up in the air, high and low temperature change in the south and north areas and haze weather and has good anti-creepage trace, flame retardance and hydrophobicity; and the reliability and economy of the product can be ensured.

The invention provides pollution-flashover-preventing coating with high self-cleaning and ultra-strong hydrophobic performance and belongs to the technical field of coating. The pollution-flashover-preventing coating is prepared by the invention is prepared from the following components in parts by mass: 10 to 15 parts of magnesium oxide, 8 to 12 parts of aluminum hydroxide, 3 to 5 parts of ferroferric oxide, 2 to 8 parts of 2-(isopropylamino)ethyl methacrylate, 30 to 50 parts of fluorine-containing p-hydroxybenzoate, 20 to 25 parts of organic silicon, 10 to 15 parts of poly-dimethyl hydroxylsiloxane containing blocked methylene, 5 to 8 parts of boron-containing polydimethylsiloxane, 3 to 5 parts of expanded graphite, 8 to 10 parts of decabromodiphenyl ethane, 5 to 10 parts of polyurethanePPA, 10 to 15 parts of diacetone acrylamide, 2 to 8 parts of oxalyl dihydrazide, 1 to 3 parts of stannous octoate, 80 to 200 parts of petroleum ether and 2 to 8 parts of ethylene glycol. According tothe high-self-cleaning pollution-flashover-preventing coating provided by the invention, the hydrophobic performance and the self-cleaning performance indexes are greatly improved; the self-cleaningperformance can be used for effectively reducing the pollution accumulation amount on the surface of a coating layer during an operation period and a better pollution-flashover-preventing effect is obtained; the hydrophobic performance is greatly improved and the service life is greatly improved.

The invention discloses an antipollution flashover disk-shaped insulator comprising an umbrella tray of a gossan, the lower surface of the parachute tray is provided with annular umbrella ridges and a water dripping edge, the water dripping edge is integrated with the umbrella tray, and a distance h1 between the lowermost end of the water dripping edge and an axis L of a disk-shaped insulator is smaller than a distance h2 between the uppermost end of the water dripping edge and the axis L of the disk-shaped insulator, i.e. the diameter of the lowermost end of the annular water dripping edge is smaller than that of the uppermost end of the water dripping edge. Because the distance h1 between the lowermost end of the water dripping edge and the axis L of the disk-shaped insulator is smaller than the distance h2 between the uppermost end of the water dripping edge and the axis L of the disk-shaped insulator, accumulated dirt on the umbrella tray naturally falls under the action of wind force and rain water, and dust particles in the atmosphere can be blocked from entering the lower surface of the umbrella tray so as to prevent the dust particles from being accumulated on the umbrella ridges on the lower surface of the umbrella tray; and moreover, an insulation ring and a cleaning brush are arranged on the umbrella tray, the accumulated dirt on the umbrella tray can be constantly swept off under the pushing of the wind force, thus the cleanness of the upper surface of the insulator is ensured and the purpose of antipollution flashover is achieved.