64results about How to "Increase the flashover voltage" patented technology

The invention relates to the field of hydrophobic paint, in particular to a semiconductor superhydrophobic paint and a preparation method thereof. The method comprises the steps of: a. firstly shearing and stirring hydrophobic nanoparticles and a semiconductive filler evenly, then adding 70%-80% of an organic solvent and conducting mixing; b. mixing thermoplastic film-forming resin with the remaining organic solvent, and performing shearing and stirring evenly; c. mixing the solution obtained in step a with the solution obtained in step b, then adding a low surface energy substance, a curing agent and an additive; and d. subjecting the solution obtained in step c to ultrasonic treatment for 2-20min, and then conducting stirring for 5min-2h till uniform stirring, thus obtaining the product. The semiconductor superhydrophobic paint adopting the scheme provided by the invention can realize self-repair, has no power consumption, and does not decompose surface organic substances.

The invention relates to an electric strength inspection device for oil paper compound insulation oil during flowing, belongs to the technical field of high voltage and insulation, and aims at solving the problems of difficulty in mounting and frequent flashover caused by processing errors of the existing electric strength inspection devices. The electric strength inspection device comprises a high-voltage bushing, a lower connecting piece of the high-voltage bushing, an upper electrode connecting piece, an upper electrode, an upper electrode insulating member, a lower electrode insulating member, an insulating screw rod, an insulating nut, a lower electrode, an insulating paper board, an oil duct, an earthing bolt, an oil inlet, an oil outlet, an oil inlet connecting piece and an oil outlet connecting piece, wherein the low connecting piece of the high-voltage bushing, the upper electrode connecting piece, the upper electrode, the upper electrode insulating member, the lower electrode insulating member, the insulating screw rod, the insulating nut, the lower electrode, the insulating paper board, the oil duct and the earthing bolt are arranged in a high-voltage test box, the upper electrode is arranged right above the lower electrode and is embedded in the upper electrode insulating member, the lower electrode is embedded in the lower electrode insulating member, and the upper electrode insulating member is arranged above the lower electrode insulating member.

The invention discloses a multi-layer high gradient insulator for a high-voltage pulse power supply and a manufacturing method thereof. The multi-layer high gradient insulator is characterized in that thin conductive layers are regularly embedded in an insulator body made of an insulated material, the side surface of the insulator, which is in a certain depth, is formed by an insulated material layer and a conductive material layer, and the interior of the insulator is formed by a single insulated material. According to the invention, a conductive array is embedded in the side surface of the insulator body, the secondary electron emitting characteristic of the surface of the insulator and the surface load charge accumulation are restrained, the vacuum surface flashover characteristic of the insulator body is improved, the surface impact voltage of the insulator body is improved, the problem that the insulated material layer is not matched with the mechanical and thermal performance of the conductive material layer is solved, and the process difficulty and cost for manufacturing the multi-layer high gradient insulator are remarkably lowered.

The invention discloses room-temperature type power insulator anti-fouling flashover paint, a preparation method thereof and a power insulator. The paint comprises a hard paint and a room-temperature curing agent, wherein the hard paint comprises the following components: resin with hydrophobic migrating performance, silicone acrylic resin, a solvent and a leveling agent; and the room-temperature curing agent comprises the following components: a catalyst and ethyl orthosilicate. Compared with the prior art, the paint has excellent hardness, a self-cleaning property, hydrophobicity and curing performance.

The invention discloses a method for improving the vacuum surface flashover performance of a solid insulating dielectric. With an epoxy resin and aluminum oxide micron composite material adopted as asubstrate, an insulating material to be treated is arranged in a closed cavity; a low-pressure glow discharge plasma treatment instrument is adopted to perform air plasma treatment on the insulating material to be treated, so that surface modification treatment can be performed on the epoxy resin and aluminum oxide micron composite material, and therefore, the surface conductivity and trap distribution of the insulating material can be changed. With the method of the invention adopted, the direct-current vacuum surface flashover voltage of the insulating medium material can be significantly improved. The method has the advantages of simple process, safe process and environmental friendliness, and can be widely used in the high-voltage insulating material field.

The invention relates to an insulator, in particular to a composite insulator used for overhead power transmission line with rated voltage higher than 10kV and a preparation method thereof. The composite insulator comprises a core rod, a full skirt and an end fitting, wherein the full skirt is internally embedded with a capacitor, the capacitor comprises a first metal sheet and a second metal sheet which are in an annular umbrella shape, the periphery of the first metal sheet is wrapped by a first insulating layer made of an insulating material, and the periphery of the second metal sheet is wrapped by a second insulating layer made of the insulating material. The invention also relates to the preparation method of the composite insulator. The invention has the advantages of increasing the capacitance of the composite insulator, improving the uniformity of voltage distribution, lowering voltage drop at a lead end, reducing the occurrence of corona, avoiding hazards on the composite insulator from the corona, and improving surface flashover voltage due to mutual composition of the first insulating layer and the second insulating layer.

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 provides a high-voltage double-pulse superposed power supply for an electrostatic dust collector. The high-voltage double-pulse superposed power supply for the electrostatic dust collector adopts three-phase input, and adopts a series resonant mode through a resonant circuit to realize zero current shutdowns; and the highest output pulse frequency is designed to be 40KHZ. The high-voltage double-pulse superposed power supply for the electrostatic dust collector effectively solves the problem of insufficient power of the high-frequency pulse power supply in the prior art, and hasthe advantages of the high-frequency pulse power supply of three-phase balance, small ripple factor, high flashover voltage and constant current characteristics; the generation of anti-corona can be avoided for high specific resistance dust; and meanwhile, the double pulse is superposed, therefore, the ultra-fine dust collection is improved, and the dust removal efficiency and power application range are improved.

The invention discloses a roof insulator suitable for a high-speed electric locomotive. The roof insulator comprises an upper hardware fitting, a lower hardware fitting, an outer sleeve and a core rod, wherein the outer sleeve comprises a plurality of umbrella skirts which are arranged in the axial direction of the core rod and arranged at the side wall of the core rod around the core rod, the upper end of the core rod is connected with the upper hardware fitting, the lower end of the core rod is connected with the lower hardware fitting, and the core rod has a skeleton structure; the skeletonstructure is formed by a plurality of support teeth which surround the outer wall of the core rod and are perpendicular to the axial direction of the core rod, and the number of the support teeth isin one-to-one correspondence with that of the umbrella skirts; the support teeth extend outwards in the radial direction of the core rod and protrude out of the side wall of the core rod; each supporttooth extends outwards from the upper end and the lower end of the connection of the support tooth and the core rod in the radial direction of the core rod and gradually shrinks towards the horizontal direction to form a tooth tip part. The core rod with the skeleton structure can effectively prevent the insulator from tearing the root of the shed, overlapping the shed and the like under the condition of high wind speed, and ensures the insulating property of the insulator.

The invention belongs to a method for improving the insulation performance of a ceramic insulator and particularly relates to a method for improving the vacuum flashover voltage of a ceramic insulator. The invention aims to solve the problem that the vacuum insulation flashover voltage withstanding performance in the existing technology of improving insulator flashover voltage has low improvementand poor reliability or a coating cannot be used for a complicated structure. The scheme for improving the flashover voltage of the ceramic insulator comprises the steps of (1) preparing a mixed solution of a silane coupling agent, an organic solvent and deionized water for hydrolysis to obtain a self-assembly reaction liquid, (2) immersing an insulator with a dry surface in the self-assembly reaction liquid for molecular self-assembly reaction, (3) taking the insulator out, cleaning the surface of the insulator and drying to obtain a pre-formed sample, and (4) performing high-temperature etherification reaction on the pre-formed sample to obtain an insulator sample. The method for improving the vacuum surface flashover performance of the ceramic insulator has the advantages of wide application range, high reliability, low process difficulty and low cost.

A piezoelectric component comprises a parallelepipedal basic body made of piezoelectric material which has an input region and an output region at opposite longitudinal ends of the basic body. Furthermore, the piezoelectric component comprises first and second primary electrodes which are arranged inside the input region and first and second secondary electrodes which are arranged inside the output region. The primary electrodes are at a greater interval from longitudinal lateral faces of the basic body in a subregion which faces the output region than in the subregion which is remote from the output region. Likewise, the secondary electrodes are at a greater interval from the longitudinal lateral faces of the basic body in a subregion which faces the input region than in a subregion which is remote from the input region.

The invention relates to an extra high voltage electric porcelain external insulation wire outlet sleeve tube which can be used for an extra high voltage GIS, a pipe mother, a circuit breaker and other equipment. The extra high voltage electric porcelain external insulation wire outlet sleeve tube comprises a porcelain sleeve, a grounding flange, and a conductive rod arranged in the center of the porcelain sleeve. A cylindrical grounding electrode is arranged between the conductive rod and the grounding flange. The porcelain sleeve at least has two adjacent sub sleeve tubes which are fixed to be a whole body through a transition member. A cylindrical middle electrode which goes through a below sub sleeve tube is arranged between the grounding electrode and the conductive rod. The middle electrode and the grounding electrode and the coductive rod are in an insulation state. According to the structure of the extra high voltage electric porcelain external insulation wire outlet sleeve tube, the electrical performance of the sleeve tube can be obviously improved, especially the wet flashover voltage and bending strength of the sleeve tube can be improved obviously, and the manufacture difficulty and manufacture cost of the extra high voltage porcelain sleeve are reduced at the same time.

The invention relates to an ultra high voltage SF6 gas-insulated wall feed-through sleeve. The ultra high voltage SF6 gas-insulated wall feed-through sleeve comprises an external insulation structure and an electrode structure arranged inside the external insulation structure, wherein the external insulation structure comprises an outdoor insulation sleeve and an indoor insulation sleeve which are connected by virtue of a flange, the electrode structure comprises a conducting rod, an intermediate electrode and a grounding electrode, the outdoor insulation sleeve and the indoor insulation sleeve are at least provided with two adjacent sub sleeves, the sub sleeves are fixed into a whole by virtue of transition pieces, and the two ends of the intermediate electrode are respectively fixed on an outdoor transition piece and an indoor transition piece. The ultra high voltage SF6 gas-insulated wall feed-through sleeve has the advantages that by virtue of innovation of external insulation and an interior electrode structure, electrical properties and bending strength of the sleeve can be obviously improved; compared with the traditional ultra high voltage wall feed-through sleeve, weight of a product self is greatly reduced, mounting is more convenient, operation is more reliable, and manufacturing difficulty and manufacturing cost of external insulation and the whole sleeve are also reduced.

The invention relates to an aviation insulating material modification method capable of improving flashover voltage and a test system thereof. The method comprises the following steps: step 1, pretreating an aviation insulating material sample; and 2, carrying out fluorination reaction on the aviation insulating material sample pretreated in the step 1 in a reaction cavity to obtain the aviation insulating material capable of improving the flashover voltage. According to the invention, the flashover voltage can be improved under the condition of low air pressure.

The invention brings forward a high-voltage-resistance electrode apparatus for space charge measurement. The apparatus comprises a grounding metal plate, a high-voltage metal electrode, a semiconducting layer, an insulation support block, an insulation sleeve, a conducting rod, insulation resin packaging parts, a grounding metal shield, an upper barrier disc, and a lower barrier disc, the insulation support block and the high-voltage metal electrode are positioned in the grounding metal shield filled with the insulation resin packaging parts, the high-voltage metal electrode is positioned under the insulation support block and connected with the insulation support block, the semiconducting layer is arranged under the high-voltage metal electrode and connected with the high-voltage metal electrode, the grounding metal plate is arranged below the grounding metal shield, the upper barrier disc and the lower barrier disc are arranged in the grounding metal shield, the lower barrier disc is arranged below the upper barrier disc, the lower barrier disc is arranged on the upper surface of the grounding metal plate, the insulation sleeve penetrates through the grounding metal shield from a side surface and is connected with a side surface of the upper end part of the high-voltage metal electrode, and the conducting rod connected with the side surface of the upper end part of the high-voltage metal electrode penetrates in the insulation sleeve. According to the apparatus, the flashover voltage along surface of the high-voltage electrode can be increased.

The invention relates to a method for increasing the surface flashover voltage of an epoxy resin insulating material, and the method specifically comprises the following steps: S1, preparing fluorine-containing molecular fragments: adding boron trifluoride ether into water-free perfluorobutanol, adding sodium hydroxide in multiple times, dropwise adding epoxy chloropropane, and carrying out an etherification reaction; adding a solvent benzene for extraction; heating and distilling filtered liquid to obtain perfluorobutanol glycidyl ether 7F-BGE; S2, preparing an epoxy resin composite material: mixing epoxy resin, a curing agent and perfluorobutanol glycidyl ether 7F-BGE according to a ratio, and stirring to obtain a uniformly dispersed castable; carrying out vacuum degassing; curing and demolding to obtain a standard test sample; and S3, testing the surface flashover voltage. The charge transport behavior of the epoxy polymer is regulated and controlled by introducing fluorine-containing molecular fragments, the material surface charge migration rate is increased, and space charge distortion caused by local space charge accumulation is reduced, so that the surface flashover voltage of an epoxy polymer matrix is improved.

The invention relates to a semiconductor anti-thunder ice combined porcelain insulator which is formed by combining an anti-thunder ice cover and a ceramic column type insulator. The anti-thunder ice cover is coated with metal oxide semiconductor glaze, and the metal oxide semiconductor glaze is formed by adding a certain amount (about 30%-35%) of conductive metal oxide tin, nickel and chromium into common electric porcelain glaze, so that the anti-thunder ice cover has special electric energy heat conduction performance, the surface resistivity is 100-110 ohms, and the surface resistivity is between an insulator and a conductor. According to the present invention, heat is generated at a normal temperature of 25-30 DEG C through the current of an overhead line, the surface voltage heat is uniformly distributed, snow and rain cannot stay, and the surface of a needle cover is always kept dry, so that the special structure of the insulator has the advantages of high insulation, high stain resistance, high strength, high durability and extremely high effect of improving an effective value of wet flashover withstand voltage of ice, snow and rainstorm, and the reliability of power transmission safety of a power grid line is ensured.