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Instantaneous overcurrent detecting circuit of optical fiber communication cascade type high-voltage inverter
InactiveCN103076489AFast over-current shutdownOvercurrent shutdown is accurateCurrent/voltage measurementAnti jammingInput impedance
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.
Owner:ANHUI EHE NEW ENERGY TECH
Circular shielding insulating bus and machining method thereof
ActiveCN103366872AReduce skin effectReduce power lossSingle tube conductorsInsulated cablesElectrical conductorEngineering
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.
Owner:JIANGSU SHILIN ELECTRIC EQUIP
Novel tubular bus system
ActiveCN105023644AIncrease surface areaUniform density distributionPower cables with screens/conductive layersInsulated cablesStructural engineeringElectrical performance
The invention relates to a novel tubular bus system comprising tubular buses and a connecting structure. Adjacent tubular buses are fixedly connected through the connecting structure. Each tubular bus comprises a wire core which is successively wrapped in an insulated layer, a shielding layer, a heat-shrinkable sheath, and an insulated sheath. The wire core is in a regular octagonal shape and is provided with a plurality of heat-dissipating channels. A polytetrafluoroethylene layer wraps the wire core and is used as the insulated layer. The insulated layer is in a cylindrical shape and wrapped in the shielding layer in a regular decagonal shape. The shielding layer is an organosilicon flame-retardant heat-conducting silicone rubber insulating coating and is wrapped in the heat-shrinkable sheath in a cylindrical shape. The heat-shrinkable sheath is wrapped in the insulated sheath in a regular dodecagonal shape. The novel tubular bus system is good in toughness, insulating performance, and electrical performance.
Owner:JIANGSU SHILIN ELECTRIC EQUIP
Wear-resistant domestic ceramic product and preparation method thereof
InactiveCN110117184AHigh strengthHigh hardnessCeramic materials productionClaywaresWear resistantMullite
The invention provides a wear-resistant domestic ceramic product and belongs to the technical field of ceramics. The ceramic product comprises a matrix and glaze. The matrix is prepared from, by weight, 35-40 parts of kaolin, 4-8 parts of quartz, 23-28 parts of potash feldspar, 18-22 parts of clay, 2-5 parts of zircon sand, 10-15 parts of waste ceramic powder and 15-20 parts of alumina. The glazeis prepared from, by weight, 10-15 parts of kaolin, 10-15 parts of orthoclase, 10-15 parts of mullite, 18-25 parts of alumina, 12-18 parts of zinc oxide, 1-3 parts of talc, 6-10 parts of zircon sand,5-10 parts of dolomite, 3-6 parts of ferric oxide and 3-6 parts of copper oxide. A preparation method of the wear-resistant domestic ceramic product includes the following steps that matrix slurry isprepared, glaze slip is prepared, and green bodies are immersed in the glaze slip, then subjected to bisque firing and finally sintered at 1280-1380 DEG C. The domestic ceramic product obtained by theprovided raw materials and the process through sintering has the advantages of good wear resistance and high shock resistance.
Owner:福建省德化县合和陶瓷技术开发有限公司
Polyphenylene sulfide purifying method
ActiveCN102731785AReduce the content of organic impuritiesStrong electrical insulationPolymer scienceSteam condensation
The invention discloses a polyphenylene sulfide purifying method. The method comprises the steps that: (1) acid-base neutralization is carried out, wherein a polymerization reaction product polyphenylene sulfide is cooled, an acid is added to polyphenylene sulfide, the pH of the mixture is controlled at 3-4, and a reaction is carried out while stirring; (2) solid-liquid separation is carried out, wherein a reaction product obtained in the step (1) is cooled and is subjected to solid-liquid separation, such that polyphenylene sulfide solid is obtained; (3) solvent washing is carried out, wherein an organic solvent is added to the obtained polyphenylene sulfide solid, and washing is carried out while stirring; (4) steam distillation and washing are carried out, wherein the polyphenylene sulfide obtained by washing in the step (3) is subjected to steam distillation under a negative-pressure condition, the residual organic solvent in the polyphenylene sulfide solid particles is recovered during the steam distillation process, and the polyphenylene sulfide is washed by using steam condensation water with a temperature of 75-85 DEG C when the content of the organic solvent is lower than 1%; and (5) drying and packaging are carried out, wherein qualified polyphenylene sulfide obtained in the step (4) is separated, dried, and packaged. Polyphenylene sulfide obtained with the method is advantaged in high electrical insulating property and high mechanical strength.
Owner:江苏新任环保科技有限公司
10-35kv insulating tubular bus and manufacturing method thereof
ActiveCN104900334AAvoid enteringAvoid partial dischargePower cables with screens/conductive layersInsulated cablesElectrical conductorBiochemical engineering
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.
Owner:大连联合高分子材料有限公司 +2
Suspended overhead transmission line online monitoring system and method
ActiveCN110132350AAvoid influenceImprove reliabilityMeasurement devicesTransmission systemsElectricityMaster station
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.
Owner:CHINA THREE GORGES UNIV
Manufacturing method of electric wire with high-performance and high life
ActiveCN106782893AHigh purityImprove overload capacityPlastic/resin/waxes insulatorsClimate change adaptationPolyolefinSilanes
The invention discloses a manufacturing method of electric wire with high-performance and high life. The manufacturing method of electric wire with high-performance and high life comprises the steps of draw benching, twisting, co-extruding, detecting, looping, warehousing and the like, high purity copper mongline or copper stranded wire is core material, after draw benching, twisting and forming, through three extruder shared with one machine head, core materials, endothecium natural color insulations and exothecium colors insulations are formed by co-extruding. Endothecium uses organosilane crosslinked polyethylene insulation, exothecium uses silane crosslinked halogen-free low smoke antiflaming polyolefin insulation, which has the advantages of halogen-free, low smoke, environmental protection and non-toxic. Formed core materials of electric wire have the advantages of high purity, strong surge capability, double insulation and co-extruding. Overall performance of steam cross-linked insulation is good in whole, an operating temperature is high, service life is prolonged, environmental pollution is rarely in whole link of producing, using and recycling.
Owner:重庆鸽牌电线电缆有限公司
Sealed connection of power lithium battery top cover electrode column and its manufacturing and assembling method
InactiveCN102299292AHighly corrosiveStrong electrical insulationCell component detailsAging resistanceEngineering
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.
Owner:黎永康 +1
Composite nylon cable bracket
PendingCN107314157AEasy constructionShorten the construction period of the projectPipe supportsCable fittingsEngineeringUltimate tensile strength
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.
Owner:镇江市神迪电力设备有限公司
Manufacturing method of high-temperature-resistant cables
InactiveCN103762028AImprove heat resistanceImprove the safety of useInsulated cablesCable/conductor manufactureGlass fiberElectrical conductor
The invention relates to the technical field of manufacturing of high temperature cables, in particular to novel high-temperature-resistant cables. The novel high-temperature-resistant cables comprise single-body single-core type cables and single-body multi-core cables. The structure of the cross section of each cable body comprises a cable body outer sheath, a filling-in body, insulating layer outer jacket shell layers, conductor insulating layers and conductors, wherein the cable body is provided with one to five conductors, the outer layer of each conductor is wrapped by one equal-thickness conductor insulating layer of a uniform structure, each insulating layer outer jacket shell layer is manufactured on the outer side of the corresponding insulating layer in a wrapped and sealed mode, and the cable body outer sheath is uniformly manufactured on the outer sides of the insulating layer outer jacket shell layers in a wrapped mode; the filling-in body of an asymmetrical and non-uniform structure is filled into the space between the insulating layer outer jacket shell layers and the cable body outer sheath, and both the filling-in body and the cable body outer sheath are made of PTFE rubber or the filling-in body is made of high-temperature-resistant cloth materials such as asbestos and glass fibers. The novel high-temperature-resistant cables are low in manufacturing cost, high in heat resistance, safe, reliable, good in anti-aging effect and wide in application range.
Owner:于洪洲
Novel anti-corrosion and anti-termite composite blockboard
InactiveCN106142235AImprove stabilityCuring shrinkage is smallCovering/liningsSynthetic resin layered productsEpoxyResin adhesive
The invention provides a novel anti-corrosion and anti-termite composite blockboard. According to the technical scheme, the novel anti-corrosion and anti-termite composite blockboard comprises a timber body and is characterized in that the timber body is wrapped with a hot melt adhesive plastic board which is formed through hot pressing of hot melt adhesive and a wood-plastic board, and an anti-termite packing layer is arranged between the hot melt adhesive plastic board and the timber body; the anti-termite packing layer, the timber body 1 and the hot melt adhesive plastic board are glued and combined through an epoxy resin adhesive film, and the timber body is wrapped with the anti-termite packing layer; and the surface of the timber body is provided with conical protrusions, and the timber body and the hot melt adhesive plastic board are matched.
Owner:金乡县元顺农贸有限公司
Spherical dynamic seal structure of wobble nozzle of small solid rocket engine
InactiveCN103867823AImprove reliabilityHigh heat fluxAdjustable jointsHigh pressurePolytetrafluoroethylene
The invention provides a spherical dynamic seal structure of a wobble nozzle of a small solid rocket engine. The spherical dynamic seal structure of the wobble nozzle of the small solid rocket engine comprises a movable positive sphere, an upstream sealing spherical surface, a downstream sealing spherical surface, an upstream negative sphere arranged outside the upstream sealing spherical surface and a downstream negative sphere arranged on the downstream sealing spherical surface, wherein the upstream sealing spherical surface and the downstream sealing spherical surface cover the movable positive sphere from both sides; the upstream negative sphere and the downstream negative sphere are connected through a connecting bolt; a static sealing ring is mounted on the abutting surfaces of the upstream negative sphere and the downstream negative sphere; the portion of the abutting surfaces of the upstream negative sphere and the downstream negative sphere, which is close to the upstream sealing spherical surface and the downstream sealing spherical surface, is provided with a rectangular gap; a teflon jacket is mounted in the gap; an elastic supporting member is mounted in the teflon jacket; the teflon jacket fits with the edge of the rectangular gap under the action of the elastic supporting member. The spherical dynamic seal structure of the wobble nozzle of the small solid rocket engine has the advantages of good abrasion resistance, acid and alkali resistance, corrosion resistance and the like at high temperature, high pressure and high rotation speed.
Owner:SHANGHAI XINLI POWER EQUIP RES INST
Preparation method of inorganic heat preservation paste
InactiveCN108546077APrevent collapseMaintain physical and chemical propertiesMaterials sciencePolypropylene fiber
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.
Owner:长兴贝斯德邦建材科技有限公司
High-temperature resistance anti-skid sole material and preparation material thereof
InactiveCN109337221AImprove high temperature resistanceImprove wear resistanceSolesChemistryCarbon nanotube
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.
Owner:长沙浩然医疗科技有限公司
Tubular type wind power bus-bar support clamp
InactiveCN105932618AImprove insulation performanceLarge air gapBus-bar installationElectricityChinese characters
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.
Owner:JIANGSU PENGZHENG MECHANICAL & ELECTRICAL EQUIP
Single 24-pulse dry traction rectifier transformer with double-bridge windings arranged in mirroring manner
ActiveCN110571021AExtended service lifeImprove securityTransformers/inductances coils/windings/connectionsTransformers/inductances noise dampingCirculating currentEngineering
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.
Owner:HUNAN UNIV
Aluminum core polyvinyl chloride insulating and flame-retardant power cable
PendingCN108389653AImprove reinforcementStrong electrical insulationPlastic/resin/waxes insulatorsInsulated cablesElectrical conductorPolyolefin
The invention discloses an aluminum core polyvinyl chloride insulating and flame-retardant power cable. The power cable comprises an aluminum conductor. A steel belt shielding layer is extruded outside the aluminum conductor, then a polyvinyl chloride insulating layer wraps the steel belt shielding layer, a high-electrical-property calcinated clay flame-retardant layer is extruded outside the polyvinyl chloride insulating layer, a nanometer environment-friendly fireproof mineral insulating layer is extruded outside the high-electrical-property calcinated clay flame-retardant layer, a high-strength halogen-free low-smoke polyolefin ribbon is extruded outside the nanometer environment-friendly fireproof mineral insulating layer, a dual-layer improved type glass fiber belt cooling layer wrapsthe outer side of the high-strength halogen-free low-smoke polyolefin ribbon, a flame-retardant corrugated composite paperboard is arranged outside the dual-layer improved type glass fiber belt cooling layer, a ceramic polyolefin outer protection layer is extruded outside the flame-retardant corrugated composite paperboard, and the ceramic polyolefin outer protection layer is coated with a nanometer radiation heat loss and cooling coating layer. The power cable has the advantages of being good in shielding property, high in interference resistance, insulativity, flame retardance and fire resistance and the like.
Owner:WUXI SHUGUANG CABLE
Insulation oxygen-isolation high-flame-retardancy power cable
PendingCN108461209AGood internal flame retardant effectImprove anti-interference abilityPower cables with screens/conductive layersInsulated cablesGlass fiberPower cable
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.
Owner:JIANGSU LONG E CABLE
Thermoplastic nylon composite insulating material and preparation method thereof
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.
Owner:TIANJIN PINGGAO INTELLIGENT ELECTRIC +2
Anti-breakage tensile cable
InactiveCN104779007ABreak-resistantReasonable structural designInsulated cablesInsulated conductorsElectrical conductorCoating
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.
Owner:ANHUI HUATAI CABLE TECH
Method for preparing novel paint
InactiveCN101096480AHas acid and alkali resistanceHigh temperature resistantCoatingsCellulose PowdersDefoamer
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.
Owner:TIANJIN ZHENDONG PAINTS CO LTD
Cross-linked multilayer composition for tubular busbar intermediate connection and prepared shielding tube thereby
ActiveCN108624036AAvoid enteringNo thermal expansion and contractionRubber insulatorsPlastic/resin/waxes insulatorsCross-linkElectrical conductor
The invention provides a cross-linked multilayer composition for tubular busbar intermediate connection. The multilayer composition comprises three layers, namely an inner shielding layer, an intermediate cross-linked insulating layer and an outer multilayer double-wall co-extruded heat shrinkable bush insulating / shielding layer in sequence from inside out, wherein the outer multilayer double-wallco-extruded heat shrinkable bush insulating / shielding layer is prepared by superposing double-layer structure type co-extruded heat shrinkable bushes; the double-layer structure type co-extruded heatshrinkable bushes are composed of an inner insulating layer and an outer shielding layer. According to the cross-linked multilayer composition for tubular busbar intermediate connection and the prepared shielding tube thereby provided by the invention, uniform electric field distribution on the intermediate connection surface of tubular busbars is ensured by an inner conductor layer and an outershielding layer, the electrical insulating property is high, partial discharge generated on the surface is avoided, and the composition is not interfered by electric fields and magnetic fields of other phase tube type busbars. Moreover, a main insulating material is excellent in electrical property and chemical stability, the low-temperature operation is reliable, the service life is greatly prolonged, and subsequent frequent repair and maintenance costs can be avoided.
Owner:大连联合高分子材料有限公司
Cross-linked multilayer composition for intermediate connection of tubular busbar and shielding cylinder prepared therefrom
ActiveCN108624036BAvoid enteringNo thermal expansion and contractionRubber insulatorsPlastic/resin/waxes insulatorsHeat-shrinkable sleeveElectrical conductor
Owner:大连联合高分子材料有限公司
Composite insulated lightning protection wall bushing for power system
InactiveCN108110702AImprove self-insulation levelGood lightning protection effectInsulating bodiesVoltageOxide
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.
Owner:山东耐高电力器材有限公司 +1
A connection device for the grooved busbar in the cabinet and the switch circuit breaker
ActiveCN106785945BHigh mechanical strengthEasy to assembleBus-bar/wiring layoutsBusbarElectrical connection
The invention discloses a connecting device, in particular a connecting device for a busbar channel and switch circuit breaker in switchgear and belongs to the technical field of distribution switchgear. The device comprises multiple insulation modules provided with mounting grooves and conductive plug strips, wherein the insulation modules press the conductive plug strips in the mounting grooves to form busbar plug channels, the device further comprises outer protective cases which sleeve the insulation modules and are used for protection and reinforcement, the insulation modules sleeve the conductive plug strips through the outer protective cases, and insulation partitions for isolation are arranged among plug channels. With the adoption of the connecting device, the problem that circuits for electrical connection in the switchgear are complex is solved, so that inner connecting units are modular, the connecting device is easy to assemble and free from maintenance due to adoption of the plug manner, the structure in the switchgear is effectively optimized, and the cost is reduced.
Owner:四川瀚舟铜铝复合材料有限公司
Instantaneous overcurrent detection circuit of optical fiber communication cascaded high voltage inverter
InactiveCN103076489BFast over-current shutdownOvercurrent shutdown is accurateCurrent/voltage measurementAnti jammingInput impedance
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.
Owner:ANHUI EHE NEW ENERGY TECH
Inorganic Light Aggregate Vitrified Bead Thermal Insulation Slurry
The invention discloses an inorganic light aggregate and glass microbead heat insulating slurry. The inorganic light aggregate and glass microbead heat insulating slurry is prepared from, by weight, 200-700 parts of silicate white cement, 100-300 parts of mineral fiber cotton, 10-20 parts of fruit plant protein wood fibers, 10-25 parts of redispersible latex powder, 5-15 parts of hydroxypropyl methyl cellulose, 50-150 parts of heavy calcium powder, 50-150 parts of sepiolite amianthus, 50-200 parts of quartz sand, 1-5 parts of starch ether, 50-210 parts of quicklime, 50-200 parts of expanded vermiculite, 400-500 parts of glass microbeads and 500-600 parts of purely natural colored sand. The inorganic light aggregate and glass microbead heat insulating slurry has the advantages of heat preservation and insulation, fire prevention, light weight, sound insulation, water resistance, cracking resistance, hollowing prevention, disengagement prevention and the like.
Owner:河南泰鑫节能科技有限公司
A kind of perovskite mica photovoltaic material and preparation method thereof
ActiveCN105489764BImprove photoelectric conversion efficiencyGood crystal formSolid-state devicesSemiconductor/solid-state device manufacturingEngineeringHigh electron
The invention relates to a perovskite-mica photovoltaic material and a preparation method thereof. The invention adopts the nano-mica material as the inert support of the perovskite light-absorbing material, prevents the support material from interfering with electron activities, forces electrons to quickly pass through the perovskite absorber layer, and significantly increases the electron transmission speed. By using the perovskite-mica photovoltaic material provided by the present invention to assemble solar cells, the photoelectric conversion efficiency of the solar cells can reach up to 13.8%.
Owner:毛志岳
A method for manufacturing high-performance and long-life electric wires
ActiveCN106782893BHigh purityImprove overload capacityPlastic/resin/waxes insulatorsClimate change adaptationPolyolefinSilanes
The invention discloses a manufacturing method of electric wire with high-performance and high life. The manufacturing method of electric wire with high-performance and high life comprises the steps of draw benching, twisting, co-extruding, detecting, looping, warehousing and the like, high purity copper mongline or copper stranded wire is core material, after draw benching, twisting and forming, through three extruder shared with one machine head, core materials, endothecium natural color insulations and exothecium colors insulations are formed by co-extruding. Endothecium uses organosilane crosslinked polyethylene insulation, exothecium uses silane crosslinked halogen-free low smoke antiflaming polyolefin insulation, which has the advantages of halogen-free, low smoke, environmental protection and non-toxic. Formed core materials of electric wire have the advantages of high purity, strong surge capability, double insulation and co-extruding. Overall performance of steam cross-linked insulation is good in whole, an operating temperature is high, service life is prolonged, environmental pollution is rarely in whole link of producing, using and recycling.
Owner:重庆鸽牌电线电缆有限公司
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