114results about How to "High insulation level" patented technology

A method of constructing a building including erecting a plurality of truss elements to form a framework including one or more walls, a roof structure and a floor structure. Each truss element includes at least two joists and a plurality of braces that maintain the joists in a parallel arrangement, the truss elements being arranged in the framework to provide an inner joist and an outer joist. An inner covering layer and an outer covering layer are attached to the framework, thereby forming an enclosed void between the inner and outer covering layers that extends substantially continuously around the framework. An insulating material is injected into the void to form a substantially continuous insulating layer between the inner and outer layers.

The present invention relates to a cascade power bus bar for maglev train maglev choppers. An insulating top plate, a conductive positive plate, an insulating partition plate, a conductive negative plate and an insulating bottom plate are orderly stacked and bonded to form a motherboard. A power end connecting hole group adaptive to a power end of a power module is arranged on the motherboard, wherein, the power end connecting hole group comprises a power end positive polarity hole, a power end negative polarity hole and a power end output hole; a positive hole and a negative hole are also arranged on the motherboard and form a connecting hole pair; conducting rings are respectively inlayed in all connecting holes on the motherboard; the power end positive polarity hole, the positive hole and the negative plate of the motherboard are separated by insulating rings; the power end negative polarity hole, the negative hole and the positive plate are separated by insulating rings; the power end output hole, the positive plate and the negative plate are also separated by insulating rings. The cascade power bus bar has the advantages of ensuring few connecting lines in maglev choppers, occupying small space, having low installation and maintenance cost as well as good heat dissipation of power devices, effectively inhibiting mutual interference among devices and improving the reliability of maglev train maglev choppers.

The invention relates to a high tension transmission line comprehensive tester which is structurally characterized in that a data testing calculation unit is connected with a power supply module, a pulse width modulation (PWM) control unit, a direct current constant voltage constant current source, an impedance matching unit, a standard resistor, a measured line resistor, a relay control unit, a storage and printing unit, a display unit and a keyboard. The PWM control unit, the direct current constant voltage constant current source, a power supply filtering unit, the impedance matching unit, the measured line resistor and a standard resistor are sequentially connected. The relay control unit is connected with an interference voltage detection unit and the impedance matching unit. The resistance-capacitance voltage dividing principle is utilized to measure the static induction voltage under 20kV, a disperse Fourier development technology is adopted to test line loop resistance, digital filtering is utilized to remove alternating current components, only direct current components are measured, and direct current voltage of the line can be still measured accurately after alternating current is overlapped. The tester provides accurate data for fixed value setting of a line automatic device and ensures that a power system runs safely and reliably.

The invention provides a coated insulating material for overall insulation of a railway switch installation device. The coated insulating material for overall insulation of railway switch installation device refers to an environment-friendly high polymer resin insulating material. The insulating material is prepared by the following steps: preparing a component A from a mixture of a hydroxyl-terminated polymer or an amino-terminated polymer containing activated hydrogen, low-molecular-weight polyhydric alcohols, polyamine, poly-hydroxy acids or other chain extenders and other weather-resistant protective materials; taking diisocyanate and polyisocyanates monomers, polymers, derivatives, or a prepolymer or a semi-prepolymer prepared by the reaction between a hydroxyl-terminated compound or an amino-terminated compound with isocyanate as a component B, and adding various protective materials according to the construction environment to prepare the double-component special insulating material for the railway switch with the solid content of 100 percent, thereby obtaining the insulating material disclosed by the invention.

The invention discloses a sealing structure for a sealing box. The sealing structure comprises an annular accommodating groove (1) positioned on an upper edge of a box body, an annular elastic sealing piece (2) accommodated in the accommodating groove (1), and a pressing plate (3) which is arranged on a box cover and is used for pressing against the elastic sealing piece (2), wherein a contact surface between the pressing plate (3) and the elastic sealing piece (2) is a plane; the elastic sealing piece (2) and the pressing plate (3) are pressed against each other through a pressing device arranged on the box body and the box cover; the elastic sealing piece (2) has the hardness of 45-50 degrees and the compression of 1-1.5mm; and the pressing plate (3) has the surface flatness of not more than 0.4. The sealing structure for the sealing box is good in sealing effect and high in insulating level, and has a protection level of IP67.

The invention discloses an insulating varnish and a preparation method thereof, belonging to the technical field of paints. The invention mainly overcomes the technical problem that a conventional insulating varnish does not have ideal insulating properties under the condition of high temperature. The insulating varnish comprises, by weight, 3 to 5.1% of dichloromethyl phenylsilane, 4 to 6.9% of monophenyltrichlorosilane, 2 to 3.5% of diphenyltrichlorosilane, 0.01 to 0.02% of zinc octoate and 20 to 30% of xylene, with the balance being tap water. The preparation method for the insulating varnish comprises the following steps: hydrolysis; washing; concentration; condensation; etc. The insulating varnish provided by the invention has a high insulation grade, strong high temperature resistance and a wide application scope.

The invention relates to the field of glass fiber cloth manufacturing, and discloses a preparation technology of glass fiber cloth. The preparation technology comprises the steps of manufacturing grey cloth, rebeaming, and performing first thermal cleaning, second thermal cleaning, air airing and surface treatment. The glass fiber cloth has outstanding high temperature resistance, and good ablation performance, and an insulation grade of an electrotechnical product is raised.

A production method for a low-smoke halogen-free mica mineral reinforced fire-resistant cable material is disclosed. The cable material is composed of mica mineral, silica gel, an antioxygen adhesion rheological agent, polyethylene master batch, low-density polyethylene and high-density polyethylene, and is prepared by performing mixing, hot melting, extrusion, wind cooling and pelletizing. The cable material is easy for production, stable in performances and reliable in quality. After being added with the cable material, a cable has strong fire resistance, high insulation grade, strong shielding property, and strong resistance to strong acids and alkalis, and also is improved in ultraviolet resistance. After being added with a little amount of the cable material, a cable has the mechanical strength improved by two times or more, and does not easily generate layering phenomenon.

The invention provides a high voltage component and an air purifier. The high voltage component provided by the invention includes a tungsten filament, a tungsten filament mounting rack and a cover plate, wherein the tungsten filament mounting rack is provided with a tungsten filament fixing end; a tungsten filament is fixed at the tungsten filament fixing end and is covered by a cover plate; the high voltage component includes a first insulation pad; the first insulation pad is covered on the side, facing to the tungsten filament mounting rack, of the cover plate. According to the invention, as the first insulation pad is covered on the side, facing to the tungsten filament mounting rack, of the cover plate, compared with the prior art, the insulation of tungsten filament and the outside is changed from the insulation of one single cover plate into insulation of the cover plate and the first insulation pad, as a result, the insulation degree of the high voltage component and the outside is increased, electrion is effectively avoided or weakened, and the purification performance is rather stable.

The invention provides a connection device applied to insulation tube type busbar ends. The device comprises a ferrule (1) which is arranged between the insulation tube type busbar ends and is used for satisfying the electrical property of the joint of the insulation tube type busbar ends, a pressing plate device which is arranged between the insulation tube type busbar ends and hoops two insulation tube type busbar ends in a plane-to-plane contact manner, or a tube-expansion device which elastically hoops two insulation tube type busbar ends. Through the ferrule (1), insulation and electric shielding of the joint of the insulation tube type busbar ends are realized. Through the pressing plate device, plane-to-plane connection of the insulation tube type busbar ends is realized, and the contact area is increased. Through the tube-expansion device, interference connection of the insulation tube type busbar ends is realized, and the relative contact pressure is increased. Crushing, built-in connection and external connection are avoided. The connection performance requirement of the insulation tube type busbar ends is met.

The invention relates to a miniature metal totally closed vacuum switch cabinet which comprises a handcart room, a main busbar room, a cable room and an instrument room; the instrument room is positioned at the front half part of the upper part of the cabinet body and is provided with a microcomputer protecting device; the handcart room is positioned at the middle part of the cabinet body, a handcart type vacuum circuit breaker is arranged in the handcart room, the main busbar room is positioned at the rear half part of the upper part of the cabinet body, and an insulating sleeve pipe and an upper contact box are arranged in the main busbar room; an external lead-out rectangular busbar is connected with the upper contact box via a central busbar hole arranged outside the cabinet body to penetrate through the insulating sleeve pipe and rationally connected with a circular busbar, the upper contact box is connected with an upper outgoing line contact arm corresponding to the handcart type vacuum circuit breaker in an inserted way, and the lower outgoing line contact arms are respectively and correspondingly connected with a lower contact box at the upper part of the cable room; a lower contact is connected with the primary side incoming end of an A, B and C three-phase mutual inductor, and the primary side outgoing end of the mutual inductor is connected with a grounding switch when being connected with electric equipment outside. The invention has scientific, reasonable, compact and rigorous design, is economic and practical and is suitable for the distribution rooms such as institutions, schools, hospitals, guesthouses and the like.

Belonging to power system area, the disclosed digital current synthesizer includes current transformation module (CTM), data acquisition module (DAM), data processing module (DPM), power amplification module (PAM), and guidance wire way out module (GWWM). Connected relation of these modules is as following: CTM converts signal of three-phase current from current transformer to signal of voltage outputted to DAM; processing the collected signal to digital signal in real time rapidly, DAM transfers the process data to the DPM; after obtaining corresponding synthesized current value in single phase, the DPM sends the value to D/A conversion module to convert it to analog signal sent to PAM; amplifying the signal, PAM through GWWM inputs the amplified signal to metal guidance wire. The invention applies microcomputer differential protective system (DPS) to guidance wire channel, and makes compatibility between disclosed and traditional DPS at area to be protected possible.

The invention discloses a novel fully-automatic scissor type winder for a capacitor, which comprises a stepper motor, a synchronous belt of a motor fixing seat, a synchronous belt wheel, a high-density urethane paper feed roller, a paper feed roller seat, a paper feed tensioning steel wheel, a tensioning steel wheel seat, a pressing foil block, a foil feed station, a winding needle, a paper drawing clip and a paper padding device, wherein the paper padding device comprises an electrolytic paper double-rail fixing block, an electrolytic paper double rail, a pair of paper padding scissors and a paper padding support sheet. When the paper padding device is used, the insulation grade between a positive aluminum foil and a negative aluminum foil during working can be improved, and the capability of resisting pressure, temperature and ripples of a capacitor is improved, thus the qualified product yield can be directly improved in production and further the quality and the service life of the product are improved.

The invention relates to a three-layer co-extrusion ethylene-propylene high-voltage insulating tube bus comprising a tube bus made of T2 red copper. The tube bus comprises a tube bus main body and a tube bus connection part. The tube bus main body is of a hollow cylindrical structure. The tube bus connection part is of an elliptical structure formed by stitching the tube bus main body. The inner walls of the tube bus connection part are in mutual contact with each other and attached with each other in a linear mode. The tube bus main body is connected to the tube bus connection part through a connection component which is of a conical structure. The tube bus main body, the tube bus connection part and the connection component are manufactured through three-layer co-extrusion technology. The design is advanced. The installation is convenient and fast. The three-layer co-extrusion ethylene-propylene high-voltage insulating tube bus is low-carbon, environment friendly, energy saving and high in cost performance. The three-layer co-extrusion ethylene-propylene high-voltage insulating tube bus fills gaps in China. In operation, joints of the bus will not easily loosen or heat. The repairing and maintenance frequency are low. The usage cost is reduced to a great extent.

The invention provides a transformer with a built-in cabin used for wind power generation, comprising an oil tank, an iron core, a three phase winding, an externally-introduced joint and an insulating system. The transformer with a built-in cabin used for wind power generation is characterized in that the transformer body is of a horizontal type; the iron core is a three-phase five-column iron core structure which is arranged in a horizontal type; the inner layer of the three phase winding is a low-voltage cylindrical winding which is used for paving oil passage stays after winding is completed, and then the high-voltage winding is wound simultaneously; the case of the oil tank is a frame which is formed by bent thick steel plates; the case of the oil tank is externally welded with rippleplates, is sealed by adhesive tapes together with the case cover; the externally-introduced joint is an elbow-type cable terminal plug-in connector; and the insulating system is a solid-liquid mixinginsulating system. The invention changes the structure of the current wind power generation transformer to meet the use requirement of the built-in cabin for wind power generation; and the invention is characterized by full insulation, full sealing, stable electric property, good mechanical performance, good weather resistance, convenient and reliable connection, dampproof and dustproof properties.

The present invention discloses a voltage detection circuit and a voltage detection device. The voltage detection circuit comprises a high-voltage detection module and a low-voltage receiving module.The high-voltage detection module is in communication connection with the low-voltage receiving module; the high-voltage detection module is used for a multi-level converter; the high-voltage detection module is configured to perform sampling detection of bus voltage signals at a direct current side of the multi-level converter, perform encoding of the obtained sampling voltages and send the encoded sampling voltage to the low-voltage receiving module, the low-voltage receiving module is configured to emit signals to a measurement instrument after decoding. The communication connection betweenthe high-voltage detection module and the low-voltage receiving module achieves high-voltage isolation so as to achieve high insulation grade. The voltage detection circuit and device achieve sampling of a direct current capacitive voltage of the multi-level converter unit to facilitate detection of real-time data of the direct current capacitive voltage of a cascade unit in development, debugging and operation processes.