45results about How to "Strong electrical insulation" patented technology

The invention discloses an instantaneous overcurrent detecting circuit of an optical fiber communication cascade type high-voltage inverter. The instantaneous overcurrent detecting circuit of the optical fiber communication cascade type high-voltage inverter comprises an emitter follower, a voltage comparer and an optical couple isolation circuit. According to the instantaneous overcurrent detecting circuit of the optical fiber communication cascade type high-voltage inverter provided by the invention, three-phase current is detected by using a Hall sensor, and is converted into a voltage signal; the voltage signal is sent to a main control instantaneous overcurrent detecting circuit; whether an overcurrent condition exists or not can be judged by comparing the voltage signal with a configured voltage comparison value; and the voltage signal is output to a main control DSP (Digital Signal Processor) chip and a CPLD (Complex Programmable Logic Device) chip of an optical fiber board for judgment. Once the overcurrent condition occurs, two paths simultaneously act, so that quicker, more accurate and more reliable overcurrent halt can be realized. Furthermore, the instantaneous overcurrent detecting circuit of the optical fiber communication cascade type high-voltage inverter provided by the invention has the advantages of high input impedance, strong electric insulation capability and strong anti-jamming capability.

The invention relates to a circular shielding insulating bus, which has the advantages of high carrying capacity, good heat dissipation, low temperature rise, strong electric insulation performance, no environmental disturbance and high reliability. The circular shielding insulating bus comprises a circular conductor and an outer layer sheath, wherein a plurality of insulating shielding layers are arranged between the circular conductor and the outer layer sheath and consist of insulating layers and shielding layers; each insulating layer comprises two polytetrafluoroethylene layers and a thermal shrinkage sheath from inside to outside; and silicone oil is uniformly brushed between the polytetrafluoroethylene and the thermal shrinkage sheath.

The invention discloses a three-layer coextruded preformed 10-35KV insulating tubular bus and a manufacturing method thereof. The section structure of the tubular bus has four layers, namely a metal tube conductor layer, a three-layer coextruded heat-shrinkage bush layer, a metal grounding shielding layer and an outer protective jacket layer in sequence from inside to outside. The present application provides a preformed product of the 10-35KV insulating tubular bus, which breaks through the traditional technology of processing the tubular bus by adopting polytetrafluoroethylene lapping or a heat-shrinkage multilayer bush. The 10-35KV insulating tubular bus has the characteristics that the three-layer coextruded heat-shrinkage bush formed by single coextrusion can be well jointed with a metal conductor tube without a clearance, so that a phenomenon of expansion with heat and contraction with cold due to the influence of cold and hot environments is eliminated, and interference of electric fields and magnetic fields of other tubular buses is avoided; meanwhile, the production process of the present application is simple and feasible, the manpower and the labor intensity are reduced, the product quality is not influenced by human factors, the production efficiency and the yield are greatly improved, the cost is lowered, and comprehensive competitiveness are increased for enterprises.

The invention discloses a suspended overhead transmission line online monitoring system and method. The system comprises a suspended monitoring device and a master station system, wherein the suspended monitoring device comprises a mainboard module, a sensor module, a data storage unit, a suspension module, an electricity taking device, a communication module, a camera-shooting module and an innerdiameter adjustment mechanism; the mainboard module is connected with the sensor module, the suspension module, the camera-shooting module, the communication module and the data storage unit; and thesuspension module and the inner diameter adjustment mechanism are connected into a whole. The suspended monitoring device is used for collecting various meteorological conditions and conductor displacement of transmission conductors and transmitting data to the master station system through the communication module; whether a corresponding early-warning threshold is reached or not is judged through a model established according to a neural network in the master station system; and online monitoring is performed on galloping or icing of the transmission conductors under the various meteorological conditions. According to the suspended overhead transmission line online monitoring system and method, self-adaptive adjustment of the monitoring device during detection of transmission lines withdifferent outer diameters can be realized by adjusting the inner diameter change mechanism, the defect that traditional conductor fixing and monitoring equipment is unadjustable is overcome, and theuniversality of the device is enhanced.

The invention discloses the sealing connection of the top cover electrode column of a power lithium battery and its manufacturing and assembling method, comprising a top cover stamping part 1, a lock nut 2, a plastic gasket 3, a Teflon sealing gasket 4 with a tapered surface, and a tapered Teflon sealing gasket 4. Teflon sealing ring 5, electrode column 6 with tapered surface, injection molding part 7. The present invention designs the electrode column 6 with a tapered surface, the Teflon sealing gasket 4 with a tapered surface, and the Teflon sealing ring 5 with a tapered surface. , when the lock nut 2 is locked, the purpose of reliable sealing of the plane and the hole is achieved. The beneficial effects obtained by adopting the above technical scheme are: excellent sealing performance, strong corrosion resistance, aging resistance, wide range of high and low temperature impact resistance, simple manufacturing and assembly process and the like.

The invention relates to a composite nylon cable bracket. The composite nylon cable bracket comprises a support seat and a support frame, wherein the support seat is of a channel steel structure, and a fixed bolt hole and a plurality of square holes which are uniformly distributed at intervals and are used for fixedly clamping the support frame are formed in the support seat; the support frame is made of nylon composite materials and is integrally formed, the cross section of the support frame is in a T shape, and the support frame comprises an upper pedestal which is used for bearing a cable and a lower base which is used for supporting the pedestal; and clamping grooves which are clamped with the square holes in the support seat are formed in one end of the support frame. According to the composite nylon cable bracket, the support frame is made of nylon, so that the composite nylon cable bracket has the advantages of high electrical insulation, low comprehensive cost, high corrosion resistance, no aging, long service life, no pollution in installation and use, no harm to bodies, high installation and connection strength, convenience in construction and low construction cost.

The invention discloses a preparation method of inorganic heat preservation paste, comprising the following steps: S1, putting polypropylene cellosilk into a water vat, scattering, adding into a pullvat, adding a proper amount of water into the pull vat, putting the pull vat under a stirrer, stirring, controlling a head of a stirring paddle to approach the bottom of the pull vat, adding an aid, aperformance additive and mica powder in sequence during stirring, supplementing a proper amount of water, and continuously stirring; S2, adding glass beads into the pull vat, stirring, and increasingthe height of the paddle; putting floating beads, paste beads and horn meal into the pull vat in sequence, supplementing a proper amount of water, and stirring until a dry mass disappears; S3, lowering the head of the stirring paddle to approach the bottom of the pull vat, shoveling off materials remaining inside the pull vat, continuously stirring, supplementing a proper amount of water, stirring, supplementing a proper amount of water, and continuously cleaning an edge; S4, pulling the pull vat to be below a lifter, lifting, pouring into a packing bag, weighing, sealing, sewing a pack, andwarehousing after inspection.

The invention discloses a high-temperature resistance anti-skid sole material and a preparation material thereof. The high-temperature resistance anti-skid sole material comprises the following raw materials: natural rubber, nitrile rubber, ethylene propylene diene monomer rubber, phenolic resin, nano-montmorillonite, boron carbide, a vulcanizing agent, dihydroxy polyester polyol, zinc oxide, carbon black, a halogen-free flame retardant, stearic acid, modified glass fibers, polyester fibers, single-walled carbon nanotubes, polyphenylene sulfide fibers, silicon carbide and a silane coupling agent KH-560; the high-temperature resistance anti-skid sole material is prepared in the following steps: preparing a base stock and preparing a modified material; then after mixing the base stock and the modified material, extruding a carcass by a screw extruder; extruding by a roller; and the like. The sole material disclosed by the invention has excellent high-temperature resistance and anti-skidperformance.

The invention discloses a tubular type wind power bus-bar support clamp. The tubular type wind power bus-bar support clamp comprises a tubular type wind power bus-bar upper support and a tubular type wind power bus-bar lower support, which are connected with each other through a plurality of high strength outer hexagon bolts; the cross section of the tubular type wind power bus-bar upper support and the tubular type wind power bus-bar lower support is of a structure in the shape of Chinese character pin; and one tubular type wind power bus-bar is connected in each square of the structure in the shape of Chinese character pin. The tubular type wind power bus-bar support clamp provided by the invention is novel in appearance, small in space occupation, and quick and convenient in installation; and besides, the insulating performance of the tubular type wind power bus-bar is improved, the mechanical strength of the tubular type wind power bus-bar is enhanced, the weathering performance of a tubular type wind power bus-bar system is enhanced, and the performance of adapting to a marine environment of the tubular type wind power bus-bar system is enhanced.

The invention discloses a single 24-pulse dry traction rectifier transformer with double-bridge windings arranged in a mirroring manner. The double-bridge winding adopts an axial double-split double-bridge four-winding structure, and each phase winding is nested on three conjugate iron cores which are sequentially arranged at intervals; the windings comprise three sets of primary side upper bridgewindings, three sets of primary side lower bridge windings, three sets of secondary side upper bridge triangular windings, three sets of secondary side lower bridge star-shaped windings, three sets of secondary side upper bridge extension windings, three sets of secondary side lower bridge extension windings, three sets of secondary side upper bridge common side windings and three sets of secondary side lower bridge common side windings. The size of the transformer is remarkably reduced, the manufacturing cost of the transformer is reduced, the transformer manufacturing process is simplified,and the electric energy quality of a rectifier system is improved. The short circuit impedance of the primary side single-phase winding to each set of secondary side single-phase winding can be completely consistent, and the short circuit impedance of the primary side three-phase winding to each set of secondary side three-phase winding can be completely consistent, so that the circulating current between the secondary side windings of the transformer is effectively reduced, and the local winding overheating phenomenon of the secondary side windings is prevented.

The invention discloses an insulation oxygen-isolation high-flame-retardancy power cable which comprises a cable core, the cable core is formed by twisting four insulating wire cores; the gap of the cable core is filled with a flame-retardant glass fiber band, a metal shielding tape is extruded outside the cable core, a first high electrical calcined clay flame-retardant layer is extruded outsidethe metal shielding tape, a flame-retardant corrugated composite paperboard is arranged outside the first high electrical calcined clay flame-retardant layer, an oxygen-isolation layer is arranged outside the flame-retardant corrugated composite paperboard, and a second high electrical calcined clay flame-retardant layer is extruded outside the oxygen-isolation layer, a metal armoring layer is arranged outside the second high electrical calcined clay flame-retardant layer, and a halogen-free low-smoke flame-retardant inner sheath is extruded outside a metal armor layer. The cable has the advantages of being good in shielding performance, good in anti-interference performance, good in insulativity, good in flame retardancy and fire resistance.

The invention discloses a thermoplastic nylon composite insulating material and a preparation method thereof, wherein the composite insulating material comprises nanometer montmorillonite and the following components by weight: 30-60 parts of a nylon 66 resin, 30-60 parts of glass fiber, 0.2-2.0 parts of an antioxidant, and 3-7 parts of a toughening agent, wherein the nanometer montmorillonite accounts for 2-7% of the mass of the composite material, and the toughening agent is any one or a combination selected from a styrene-butadiene-styrene block copolymer, a styrene-ethylene-hydrogenated butadiene-styrene block copolymer, an ethylene-vinyl acetate copolymer and an ethylene-acrylic acid copolymer. According to the present invention, the thermoplastic nylon composite insulating material has low density, such that the insulating member prepared from the thermoplastic nylon composite insulating material is small and light; and the thermoplastic nylon composite insulating material has advantages of excellent mechanical properties, excellent heat resistance and excellent electrical insulation property, is suitable for the manufacturing of medium-voltage electric apparatus insulating members, is a thermoplastic plastic, can be recycled, and further has good economic and environmental benefits.

The invention discloses an anti-breakage tensile cable. The anti-breakage tensile cable comprises a cable body, wherein the cable body comprises conductors, an insulation layer, a shielding layer and an outer sheath, wherein a plurality of conductors are arranged in the cable body; the cross sections of the conductors adopt circular structures; an optical unit is arranged at the center of the cable body; the insulation layer tightly wraps the outside of the conductors; an insulation tape layer is arranged in a gap part between the insulation layer and the conductors; the shielding layer tightly wraps the outside of the insulation layer; a ripple stainless steel layer tightly wraps the outside of the shielding layer; the ripple stainless steel layer is wrapped with a fireproof mica tape and the outer sheath in sequence from inside to outside; a glue coating layer is arranged between the outer sheath and the fireproof mica tape. The cable has the advantages of reasonable structural design, breakage resistance and long service life.

The invention discloses a method for preparing a new paint, which comprises the following steps: mixing 60kg 800-1200 mesh light calcium carbonate powder, 30kg 800 mesh talcum powder, 25kg 800 mesh alta-mud powder, 400kg 500 mesh sierozem, 477kg 500 mesh double air powder; adding 4kg cellulose powder; mixing continuously; packaging; mixing 4.5kg film adjuvant, 0.5kg tributyl defoamer, 2kg dibutylphthalate, 1kg ethandiol and 25kg drinking water homogeneously and packaging; adding 50kg paint powder in 30kg water, mixing homogeneously, adding 3kg paint adjuvant, mixing homogeneously and using in two hours when using. The invention is provided with the acid-base resistance, the high temperature resistance, the friction resistance, the good gliding property and the strong adhesive force.

The invention relates to the technical field of power system equipment manufacturing, and particularly relates to a composite insulated lightning protection wall bushing for a power system. The composite insulated lightning protection wall bushing comprises an insulating pipe body, wherein a conductive body is arranged inside the insulating pipe body, a fixed flange is arranged in the middle of the insulating pipe body, a metal oxide valve plate group sleeves outside the part of the insulating pipe body located at the outdoor end, one end part of the metal oxide valve plate group is connectedwith an outdoor connecting bolt and an outdoor conducting rod, the other end part of the metal oxide valve plate group is connected with the fixed flange, and a silicone rubber sheathed umbrella skirtis arranged on the outermost side of the insulating pipe body. According to the scheme of the invention, the insulation performance of a conventional wall bushing and the lightning protection performance of a metal oxide arrester are integrated, the own insulation level of insulating bushings can be improved, a good lightning protection effect can also be realized, the problem that indoor equipment is damaged as the lightning over-voltage invades to a power substation or a power distribution room along overhead lines during lightning strikes can be avoided, and the power supply reliability can be beneficially improved.