58results about How to "Excellent anti-pollution flashover performance" patented technology

The invention provides a fluorinated silicone rubber anti-pollution flashover coating for extra-high voltage and a preparation method thereof; the fluorinated silicone rubber anti-pollution flashover coating (short for FRTV) has the following compositions by mass percent: 5-30 percent of fluorinated silicone rubber, 10-30 percent of silicon rubber, 4-8 percent of nanometer grade gas-phase white carbon black, 0.5-8 percent of compound fire retardants, 0.2-0.5 percent of firming agent, 0.01-0.05 percent of catalyst, 0.02-0.08 percent of antioxidant, 2-8 percent of flatting agents, 0.2-0.4 percent of de-foaming agent, 0.1-0.5 percent of paint and 30-60 percent of solvent. The compound fire retardant is composed of inorganic aluminium hydroxide and organic decabromodiphenyl oxide, wherein comprising 1-6 percent of the inorganic aluminium hydroxide and 0.5-3 percent of the organic decabromodiphenyl oxide. The preparing process of the coating is simple, and the coating has good weather ability, oil resistance and longer service life.

The invention belongs to the technical field of electrical insulation materials, and specifically relates to a hydrophobic electrical insulation epoxy resin composition. By adding a fluorine-containing modifier and a silicon-containing modifier into raw materials to realize fluorine-silicon union modification on epoxy resin, the epoxy resin is endowed with excellent hydrophobicity and toughness, wherein low molecular weight silicon oil having the molecular weight not more than 998 is adopted as the silicon-containing modifier, so that a demixing phenomenon can be better inhibited while the toughness is improved; and a low molecular weight fluoride having the molecular weight not more than 850 is adopted as the fluorine-containing modifier, so that the hydrophobicity of the composition is greatly improved. Meanwhile, the hardness and the electric mark resistance of the composition are improved by filling a proper amount of inorganic filler, so that the epoxy resin composition has good hydrophobicity, electrical insulation property and mechanical properties at the same time, and can be used as an umbrella skirt material of insulators.

The present invention is production process of silicon rubber mutual inductor with the advantages of both epoxy resin and silicon rubber. The production process includes two steps, one vacuum epoxy resin casting step to form epoxy resin layer on the windings of mutual inductor and one silicon rubber casting step to form silicon rubber layer in all the non-winding parts of the mutual inductor. The silicon rubber casting includes pre-treatment of the mutual inductor and casting inside a vacuum casting apparatus.

The invention discloses a silicone rubber umbrella skirt for an extra-high voltage composite insulator and a preparation method thereof, and relates to the technical field of silicone rubber materials. According to the silicone rubber umbrella skirt for the extra-high voltage composite insulator, the silicone rubber umbrella skirt is prepared from the following raw materials in parts by weight: 100 parts of methyl vinyl phenyl silicone rubber raw rubber, 40-80 parts of an Mg-SiC compound, 50-70 parts of modified diatomite, 1.5-4 parts of a silane coupling agent, 3-5 parts of hydroxyl silicone oil, 4-7 parts of cyclic trisilazane, 5-8 parts of nano ZnO, 2-5 parts of titanium dioxide, 1.5-3 parts of a dispersing agent and 1-3 parts of a vulcanizing agent. The invention also discloses the preparation method of the silicone rubber umbrella skirt for the extra-high voltage composite insulator. The silicone rubber umbrella skirt has excellent electrical insulativity, flame retardance, hydrophobicity, high and low temperature resistance and mechanical strength, the pollution flashover resistance and aging resistance of the silicone rubber umbrella skirt are improved, the silicone rubber umbrella skirt is not easy to damage, and the service life of the composite insulator is prolonged.

The very-high voltage composite post insulator used for outdoor open-type power distribution unit comprises: an insulator included a hollow fiberglass-made core body and a silastic-made shed sheath, and a shielding ring fixed on top end of the insulator. This invention divides mechanical strength and outer insulation performance, integrates material advantages, such as resistance to atmospheric pollution, well aging performance and good tension, and fit to running performance index of 1000kV very-high voltage power network.

The invention discloses an AC hanging-type composite insulator, comprising a mandrel, hardware arranged at both ends of the mandrel, a sheath covered outside the mandrel, wherein, the outside of the mandrel is provided with large umbrellas which are coaxial with the mandrel and whose diameter is identical to that of the mandrel and small umbrellas or the combination of a medium umbrella and the small umbrella. Through adjusting the arranging sequence of the umbrellas with different diameters, the umbrella extension and the umbrella clearance of the umbrellas with different diameters are optimized, and umbrella-skirt structural parameter of AC composite insulator with the optimal pollution flashover characteristic is obtained. The umbrella-skirt structural parameter after optimization design leads the composite insulator to have excellent resistance to pollution flashover under the conditions of the same structural heights, meanwhile, the design of the structure is reasonable, accordingly, the umbrella-skirt material of the composite insulator is greatly saved, and the waste of the material is avoided.

The invention provides a wind electric field collector line leading wire spraying de-icing method. The method comprises steps that (1), in-situ molded anti-pollution flashover PRTV paint is prepared;(2), on-site investigation before construction is carried out in advance; (3), insulators are cleaned; (4), adjacent parts of suspended string spraying parts are protected; (5), a lead part is sprayed; (6), one or two times of high-altitude spraying are carried out through utilizing scaffolds, ladders or work vehicles, high-altitude spraying from top to bottom without trampling, stepping or colliding with the sprayed insulators is carried out, damage to the spraying surface is avoided, and influence on the spraying quality is avoided; and (7), quality inspection is carried out to guarantee thespraying effect. The invention discloses a corresponding wind electric field collector line leading wire spraying de-icing system. Collapse of towers and line break caused by severe icing are solved,leading wire icing is effectively reduced, bird damage is prevented, lower leading wire insulation is enhanced, the anti-pollution flashoverover effect after equipment operation is guaranteed, and endless cleaning, lifting and other maintenance works are omitted.

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 preparation method of a composite insulator of a hard material layer reinforced core rod. A hard material of a hard material layer comprises the following components in parts by weight: 100 parts of alicyclic epoxy resin, 30-50 parts of plastic, 20-40 parts of a methylhexahydrophthalic anhydride curing agent, 10-15 parts of an aluminum trihydrate micro-powder flame retardant, 1-2 parts of a silanization coupling agent and 2-10 parts of a fluoride auxiliary agent. The preparation method comprises the following steps: inserting an insulating core rod into a center hole of a hardware fitting, and then forming an integral body through crimping or gluing; putting the insulating core rod-hardware fitting composite body into a mold, and forming a hard material layer on the outer surface of the core rod; and forming a silicon rubber sheath and a silicon rubber umbrella skirt on the outer side of the insulating core rod-hardware fitting composite body with the hard material layer to obtain the hard material layer reinforced core rod. The reinforced core rod is wrapped by the hard material layer, and the silicon rubber sheath and the umbrella skirts are adopted, so that the composite insulator has the characteristics of high hardness, corrosion resistance, bird pecking resistance and the like, and the performance of the composite insulator is further improved.

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 relates to a photothermal and electrothermal hybrid DC anti-icing composite insulator which comprises a hardware end, a voltage equalizing device, a core rod, a sheath and an umbrella skirt. The umbrella skirt comprises combination of two or more of a silicone rubber layer, a photothermal layer and a semiconductor layer. The umbrella skirt is composed of the silicone rubber layer, the photothermal layer and the semiconductor layer. The photothermal layer is arranged on the upper surface, the silicone rubber layer is arranged in the middle and the semiconductor layer is arranged on the lower surface; or the umbrella skirt is composed of the photothermal layer and the silicone rubber layer, and the photothermal layer is arranged on the upper surface and the silicone rubber layer is arranged on the lower layer. The photothermal layer is prepared by mixing inorganic metal oxide with silicone rubber or RTV coating. The semiconductor layer is prepared by mixing conductive graphite micropowder with silicone rubber or RTV coating. The unique hydrophobic mobility of the silicone rubber layer can be migrated to the surface of the photothermal layer so that the insulator has excellent anti-pollution flashover capability, reduces the field strength at the high voltage end of the insulator and delays the aging of the insulator. In the ice and snow weather in winter, the photothermal layer and the semiconductor layer can effectively melt ice and prevent ice flash accidents through the breaking effect during icing.

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 zinc oxide lightning arrester with a controllable part adopting a small-diameter valve plate. The lightning arrester comprises a fixed part and the controllable part, and is characterized in that one end of the controllable part is connected with a gas gap unit, the other end of the controllable part is connected with one end of the fixed part, the fixed part and the controllable part respectively comprise at least one layer of lightning arrester valve plate, the multiple layers of lightning arrester valve plates are connected in series, and the diameter of the lightning arrester valve plate of the fixed part is larger than that of the lightning arrester valve plate of the controllable part. The lightning arrester is simple in structure, the charge rate can be reduced, the service life of the lightning arrester is prolonged, and the aim of enhancing the lightning overvoltage limiting capacity is achieved when lightning voltage comes.