173 results about "Insulation Problem" patented technology

The invention discloses a two-sided metal based circuit board which comprises a metal base plate, a heat conducting insulating plate covering two sides of the metal base plate and a circuit layer covering the outer side of the heat conducting insulating layer, wherein a through hole is arranged on the circuit board and filled with an insulating body, a conducting hole is arranged in the insulating body, and a conductive layer communicated with the circuit board layer covers the inner wall of the conducting hole. The invention also provides a production method used for the circuit board, which comprises the following steps of: drilling the base plate, filling the through hole with insulating resin, covering the heat conducting insulating layer and the circuit board layer on the metal base plate sequentially, drilling the middle of the resin filled in the through hole, and plating copper on the inner wall of the hole to form the conducting layer. The two-sided metal based circuit board provided by the invention can effectively solve the insulation problem of the metal base plate and the circuit board layer during circuit board drilling and wire jumping, realizes wire jumping in the hole, and reduces the circuit board structure problem needing considering when the circuit is designed.

The invention relates to a double-layer waterproof and double-layer water exhaust structure of a heat insulation house surface and a construction method thereof. The structure respectively consists of a reinforced concrete house surface layer, a bottom cement mortar leveling layer, a bottom waterproof layer, a heat insulation layer, a surface cement mortar leveling layer and a surface waterproof layer from bottom to top. Two sets of waterproof and water exhaust structures are arranged at the upper part and lower part of the heat insulation layer. A plurality of transversal and longitudinal gas exhaust channels are arranged on the bottom cement mortar leveling layer. House surface gas exhaust outlets are arranged in the cross parts of the transversal and longitudinal gas exhaust channels. House surface gas exhaust pipes are arranged on the house surface gas exhaust outlets. The constructing method has the following steps of: paving the house surface plate; respectively arranging the bottom cement mortar leveling surface to falls, the bottom waterproof layer, the heat insulation layer and the surface cement motor leveling layer to falls, and the surface waterproof layer on the housesurface plate; arranging the gas exhaust pipes of the house surface and the water exhaust pipes of the heat insulation layer, wherein the two water exhaust pipes are communicated with the water collecting part on the house surface, and the other ends are arranged in a water falling hopper; and communicating the water falling hoppers with the total water exhaust pipes. The invention solves the waterproof and heat insulation problems of the house surface, and has obvious waterproof and water exhaust effects.

The invention discloses a wireless sensing network system for monitoring temperature of power transforming and transmitting system and implementing method thereof. The system includes a power transforming and transmitting facilities internal temperature testing system, and a power transmission line connection part temperature testing system; a wireless temperature monitoring system is composed by combining a ZigBee net and a 433MHz star net, the ZigBee coordinator is provided with a 433MHz radio frequency transmit-receive module, simultaneously as the sub-node of the433MHz star net of the power transforming and transmitting facilities internal temperature testing system, which consists a 433MHz star net with the star net master node of the 433MHz power transforming and transmitting facilities internal temperature testing system. The invention has beneficial effects of high measurement precision; convenient mounting without limitation of some specific structures like switch cabinet body; and no electric association between network appliances, due to the radio wave signal transmission, thereby radically resolving the high-voltage insulation problem. So that the method is an ideal resolving scheme for monitoring temperature of power transforming and transmitting system.

The invention relates to a liquefied natural gas carrier independent cargo space insulation layer system and a construction method thereof. The liquefied natural gas carrier independent cargo space insulation layer system comprises a prefabricated insulation plate module, wherein the prefabricated insulation plate module comprises anti-splashing screen plates and a polyurethane foam insulation plate; the anti-splashing screen plates which are installed continuously and elastic sub-screen wall film seal connectors which are arranged between above a gap between two adjacent anti-splashing screen plates in a bonding manner and used for sealing the gap form a sub-screen wall layer; and the liquefied natural gas carrier independent cargo space insulation layer system comprises a protection layer, a filling insulation material, a fixed bolt, a nut and a seal washer. By adopting the technical scheme, the insulation problem of an IMO B-type cargo space can be solved.

The invention discloses a silicon-based composite anode material for a lithium ion battery and a preparation method thereof. The anode material comprises a graphite skeleton and an amorphous carbon layer which coats the graphite skeleton. The graphite skeleton is filled with a silicon material coated with a carbon-containing structure. The silicon material and the graphite skeleton are combined through a loose carbon material. The preparation method at least comprises the following steps: (1) preparing the silicon material coated with the carbon-containing structure; (2) preparing spherical particles with graphite as the main body; (3) coating the spherical particles with the amorphous carbon layer; and (4) granulating. According to the invention, the electric insulation problem of silicon anode due to its volume change can be solved, and it can be guaranteed that silicon active component can always be electrically contacted with a current collector during the charge-discharge cycle process. Meanwhile, huge stress effect caused by volume expansion/shrinkage of the active material silicon is further buffered. Then, the composite material has characteristics of high electrochemical cycle stability and regulable specific capacity.

The electrode for high-voltage in-situ impedance spectroscopy measurement of the present invention and its preparation method and application belong to the technical field of in-situ measurement of electrical quantities under high-voltage conditions. The electrode consists of an aluminum oxide protective layer (3) deposited on the surface of the diamond anvil (2) and a metal film electrode (1); the metal film electrode (1) is circular in the center of the anvil surface of the diamond anvil (2), Copper wire (5) is bonded to the metal film electrode (1) on the side of the diamond anvil (2); the metal spacer (4) is used as another electrode, forming an axisymmetric electrode together with the metal film electrode (1) system. Electrodes are prepared by magnetron sputtering, molybdenum coating, aluminum oxide deposition, photolithography and chemical corrosion. The invention solves the problems of electrode fixing and sample cavity insulation, and can ignore the influence of the parasitic capacitance and inductance of the system on the measurement results, making it possible to measure the material impedance spectrum in situ with the diamond anvil under high pressure.

The invention discloses a visualization experiment device for a deep cryogenic two-phase countercurrent process. The visualization experiment device comprises a liquid collecting section, a testing section, a flange plate and a liquid inlet taper pipe, wherein the liquid collecting section is welded with an air inlet pipe and a liquid outlet pipe; inner and outer pipes in the testing section are two concentric transparent organic glass round pipes with different diameters, the inner pipe is a cryogenic fluid passageway, the upper end of the inner pipe is provided with a liquid inlet, and the lower end of the inner pipe is provided with a gas inlet; and an interlayer between the inner pipe and the outer pipe is vacuumized for heat insulation. The two ends of the outer pipe are connected with metal flanges, the upper end of the inner pipe is connected with a flange, and the lower end of the inner pipe is sequentially connected with a horn-shaped metal connection component and a corrugated pipe. The corrugated pipe is welded with a flange of the liquid collecting section through a transition member. The flange surfaces of the upper ends of the two pipes are level, and the flange surfaces of the lower ends of the two pipes and the flange surface of the liquid collecting section are sealed through polytetrafluoroethylene gaskets and bolts. A cylindrical metal liquid reservoir is welded onto the other side of the lower flange of the inner pipe, and is coaxial to and communicated with the inner pipe. According to the visualization experiment device for the deep cryogenic two-phase countercurrent process, the visualization of the deep cryogenic two-phase countercurrent process can be realized, and deep cryogenic vacuum insulation problem can be solved.

The invention provides an air-cooling structure, comprising a cover body and at least a built-in heat dissipation channel; wherein, an air inlet port of the heat dissipation channel is arranged on theside wall of the cover body, an air outlet port of the heat dissipation channel is arranged on the bottom wall of the cover body, and the position of the air outlet port corresponds to the position of the battery module in the battery box. According to the air-cooled structure, the heat dissipation channel is arranged in the housing, such that a sandwich structure is formed between the battery module and the heat dissipation channel, so as to improve the heat dissipation effect of the battery module, In addition, when the external cold air enters the heat dissipation channel from the air inlet port, it meets the hot air (heat) generated by the battery module. If condensed water is generated, the condensed water can be discharged through the cover body, thus avoiding insulation problems caused by the battery module, thereby improving the safety and reliability of the battery module, and further prolonging the service life of the battery module.

The invention relates to an environment friendly outdoor AC high voltage full-sealed combined electric apparatus which uses environmental friendly gases to replace the gas of SF6 for solving the problem of a poisonous low fluorin compound generated by the gas of SF6 used for arc extinguishing. A double-fracture type vacuum arc extinguishing chamber is adopted for arc extinguishing; a compound insulating bushing is arranged at the two sides of the arc extinguishing chamber; a three-power position isolating switch is arranged in the lower surface; the lower part of the bushing is sheathed with an electromagnetic mutual inductor or a photoelectric mutual inductor; high pure nitrogen is filled in the bushing and a tank body for internal isolation; the high pure nitrogen is adopted between the vacuum arc extinguishing chamber and the tank body for internal isolation; the fracture of each double-fracture type vacuum arc extinguishing chamber is provided with an equalizing capacitor; the three-power position isolating switch adopts the high pure nitrogen as the internal isolation, thus shortening the mounting time and improving the reliability and safety of the device. The environment pollution is avoided in particular as the gas of SF6 is not used.

The invention discloses a device and a method for verifying insulation monitoring accuracy and leakage protection of a battery pack management system, which are used for verifying insulation monitoring accuracy of a detected battery pack (1) of the battery pack management system. The device comprises a first single-throw switch (K1), a second single-throw switch (K2), a double-throw switch (K3), a variable resistance box (2), an ammeter (3) and a fuse (4), wherein one end of the variable resistance box (2) is connected with the ammeter (3) in series, and the other end is connected with a movable end (c) of the double-throw switch (K3); a first fixed end (a) of the double-throw switch (K3) is connected with a positive electrode of the battery pack (1) through the first single-throw switch (K1) and the first wire harness (5) in sequence; a second fixed end (b) of the double-throw switch (K3) is connected with a negative electrode of the battery pack (1) through the second single-throw switch (K2) and a second wire harness (6) in sequence; and one end of the fuse (4) is connected with the ammeter (3) in series, and the other end is connected a shell body of the battery pack (1) through a third wire harness (7). The device and the method can be used for verifying accuracy of the battery pack management system, and the battery pack management system alarms when an insulation problem of the battery pack occurs, thereby protecting the battery pack, and standardizing the insulation testing method of the battery pack management system.

The invention relates to a resistance-type liquid level sensing device for measuring the liquid level height of conducting liquid in a liquid storage container, comprising a cross beam. The cross beamis provided with more than one horizontally placed short shaft (at a working position), the short shaft is provided with an electrode with one end provided with a circular installing hole, and the electrode is electrically insulated from the cross beam and can rotate around the short shaft to the length direction of the cross beam so that the liquid level sensor can be installed through an installing hole of an overflow vent pipe of the liquid storage container. The liquid level sensor does not need to change the liquid storage container in installation, is convenient to install and use, hasno sealing and insulation problem in liquid by only immersing the metal electrode into the liquid, long service life and high reliability and solves the problems of the inconvenient installation and the short service life of the prior liquid level sensor.

The manufacturing method for an insulation section bar for steel door and window mainly solves the problem of loose bonding of the steel and the plastics due to the rebound of the steel of the cold bending roll method and also the bad heat insulation problem resulted from the using of conductive welding post to connect two steel section bars. Assembling the two steel section bars with a plastic part within and softened the plastic with heat, and pressed the softened plastics to the grooves and holes preserved in the steel section bars, and after cooling down, a new section bar is formed with the steel bars closely connected with the insulation plastics and therefore solves the above mentioned issues. The steel section bars for door and window made in this method is effective in heat insulation, hard in structure and it has high endurance.

The invention provides a preparation method of a heat-conducting gasket, which comprises the following steps: A) immersing a template, spraying and pouring a graphene dispersion liquid, drying to obtain a graphene compounded template structure; B) removing the template from the template structure to obtain a three-dimensional membrane graphene network structure: C) filling the three-dimensional membrane-shaped graphene network structure with slica gel containing a insulation heat condutiong filler to obtain heat-conducting gasket sample; D) compounding a packaging layer on the heat-conductinggasket sample to obtain the heat-conducting gasket. According to the preparation method, by adopting the graphene network structure containing the specific three-dimensional membrane, graphene sheetsin the network structure is closely arranged in sequence, so that the problem that the graphene is difficult in dispersion and the incomplete lapping joint of the graphene sheets is solved by forminga good heat-conducting loop. According to the preparation method, the ordered arrangement problem of graphene sheets is solved, so that the high heat-conducting efficiency requirement is met, the insulation problem is solved at the same time so as to meet the testing requirement of breakdown voltage.

The invention discloses a side contact type double-boot current collector which uses insulating arms and operates by using a parallelogram operating mechanism. The current collector comprises an equipment base, an upper insulating arm, a lower insulating arm, a carbon contact strip support, a torsion spring, a carbon contact strip and auxiliary parts. The upper arm and the lower arm of the current collector are made of an insulating material, so that the insulation problem of the current collector is solved, and the base can be made of cast steel and is directly connected with a bogie; and the parallelogram operating mechanism enables the carbon contact strip to be vertical to a conductor rail surface all the time in the working process, so that good surface contact between the carbon contact strip and the conductor rail surface is guaranteed all the time, and the electrical conduction efficiency is improved.

The invention provides a permanent-magnet DC fan cluster system topological structure, which comprises a plurality of permanent-magnet DC fan parallel branches, wherein each permanent-magnet DC fan parallel branch comprises a plurality of permanent magnet DC fan assemblies connected in parallel. The plurality of permanent-magnet DC fan parallel branches are connected in parallel to form a close-loop structure. Each permanent magnet DC fan assembly outputs a high-voltage direct current. The close-loop structure is provided with a high-voltage DC convergence point. For the defects of complex DC fan series-parallel control and difficult fault processing, magnetic-integration high-frequency transformers and high-frequency high-voltage rectifiers are utilized to solve the problems of high-voltage direct current generated by each DC fan, the multi-fan cluster system topological structure and fault tolerance, thereby preventing the problem of extra electrical insulation due to series connection of the DC fans, and overcoming the problem of fan power distribution and complex voltage stability control due to different wind speeds or fault.

The invention discloses a fault indicator which collects the temperature signal of a cable, a grounding fault signal and a short-circuit fault signal and transmits the signals to a host computer through an optical fiber for signal analysis. When the host computer judges that the temperature signal exceeds a preset value or a grounding phenomenon or short circuit phenomenon appears, a local alarm connect with the host computer is turned on to carry out alarm prompt. According to the invention, the fault indicator can determine whether a cable fails in time; the staff can use the local alarm situation to quickly determine a line fault section and find a fault point; in addition, the collected signals are transmitted through the optical fiber, which realizes photoelectricity isolation and effectively solves the insulation problem; the signals in a transmission process have small energy loss and are not susceptible to external interference; the host computer is powered by a dual power supply module; the redundancy is improved; and power supply is more reliable.

The invention belongs to the sound insulation technological field and relates to a low-frequency broadband ventilation, heat-dissipating and sound-insulating structure. The low-frequency broadband ventilation, heat-dissipating and sound-insulating structure includes a plurality of periodically-arranged Helmholtz resonators and sound absorbing plate structures disposed in the Helmholtz resonators;the upper end and lower end of the Helmholtz resonator are respectively provided with at least one extension path extending toward the inside of the cavity of the Helmholtz resonator, and wherein theextension path is communicated with the outside; and at least one ventilation vent hole is formed in the middle of the sound absorbing plate structure. According to the low-frequency broadband ventilation, heat-dissipating and sound-insulating structure of the invention, the sound absorbing plate structures are arranged in the Helmholtz resonators, so that a sound insulation problem in the Helmholtz resonators caused by high-frequency modes can be solved, and the low-frequency broadband sound insulation of the whole structure can be realized; and the functions of ventilation and heat dissipation are realized by the ventilation and heat-dissipating holes formed in the sound absorbing plate structures and the extension paths in the Helmholtz resonators.

Disclosed is an insulation central spindle electric conduction slip ring. Brush rings and insulation spacers are alternately arranged on a central spindle to form a rotor portion, the main portion of a stator is formed by facts that brushes and brush spacers are alternately arranged on brush fixing rods of a slip ring base and tension springs are disposed among brushes, and the central spindle is made of polyetheretherketone of thermoplastic plastics. According to the insulation central spindle electric conduction slip ring, the problem of insulation between the brush rings and a slip ring spindle, which frequently occurs in existing electric conduction slip rings, is radically solved so that reliability of the electric conduction slip ring is greatly improved, reliability of equipment which is provided with the slip ring is improved, and especially the slip ring has an important significance in precision equipment.

The utility model relates to a skin-effect heating component, comprising a carbon steel tube, a plurality of alloy heating wires, a plurality of magnesia powder, a leading bar, metal plug and an anti-corrosive stainless steel bushing, Which is applied for various large electric heating equipments in petrol, chemical, electric power and similar industries. The utility model has the advantages of simple structure, high reliability, long life and that no current passes through the whole surface of the carbon steel tube, thus the insulation problem of cluster large-power electric heating component is solved, enabling wide market prospect.

The invention relates to a circuit for detecting an insulation fault of a solar battery. The detecting circuit comprises at least one operational amplifier, a plurality of resistors and a testing end which is connected with the anode (cathode) of a solar panel. The circuit has the obvious advantage of detecting the insulation problem caused by a field wiring problem by diagnosing whether an insulation problem exists after the solar panel is connected, and effectively detecting the insulation problem caused by the ageing problem of devices because of the long-term use of solar products.

The invention provides a forced air cooling method and device for an isolated-phase enclosed busbar. The forced air cooling method is used for cooling an air cooling busbar with a shell and a tubular conductor and includes the following steps that cold air flows in the same direction as an interlayer between the shell and the conductor along the interior of the conductor of the air cooling busbar. The forced air cooling device comprises a circulation fan, an air cooler and the air cooling busbar used for cooling the shell and the tubular conductor and further comprises an input channel and the interlayer, wherein the input channel is used for being connected between an air outlet of the circulation fan and the first end of the air cooling busbar, and the interlayer is used for conveying the cold air output by the circulation fan into the conductor of the air cooling busbar and into the portion between the shell and the conductor. According to the air cooling method and device, the inner surface and the outer surface of the busbar conductor can make direct contact with air flow, equipment layout is simple, the cooling effect is more excellent, the heat exchange efficiency is high, the problem of insulation of an air inlet and the air outlet is solved, and the problem of isolation of the interlayer and an inner tube of the conductor in a double-air system does not need to be considered too much.

The invention provides a power transmission line sectioned insulating overhead ground wire multi-point power accessing system based on electromagnetic induction. The system comprises an impact protection unit, a processing circuit and a monitoring unit, wherein the input end of the impact protection unit is respectively connected with an iron tower and a sectioned insulating overhead ground wire, the output end of the impact protection unit is connected with the input end of the processing circuit, and the monitoring unit is connected with the processing circuit to adjust the output voltage scope according to setting. The system allows directly accessing power from an earthed overhead ground wire, solves the insulation problem, and is suitable for monitor equipment on ground potential. The system has high engineering application value, and can be widely promoted. The system limits adverse influence on load supply voltage by fluctuation of ground wire voltage or current, and ensures safe use. A super capacitor is employed to power loads, which ensures sufficient service power and power time for loads during a power-off time. The system is also maintenance-free and is width in operational temperature range and long in service lifetime.

A structure for a housing of a power electronic part of a vehicle, particularly the battery, having varying thermal conductivity, the housing having insulation properties for solving heat dissipation and heat insulation problems. and controlling thermal conductivity depending on a surrounding environment is disclosed. The housing is manufactured with a hollow portion, configured to be filled with ellipsoidal magnetic particles coated with electrical insulation-type thermal conductive particles on their surfaces, and a containing a liquid fill in a state of being mixed with each other. Thermal conductivity is controlled by changing orientation of magnetic particles according to direction of a magnetic field applied by a magnetic field generating member.

The invention provides an agricultural ecological system energy circulatory system, which comprises a crop planting system and a livestock breeding system. The livestock breeding system comprises a livestock breeding farm, a biogas preparation device and a biogas collector, a generator is connected with the biogas collector by a pipeline, a solid and liquid separation device is connected with thebiogas preparation device, biogas slurry separated by the solid and liquid separation device can be used as a water flush fertilizer for vegetables, seedlings and fruit trees, biogas residues can be used as organic fertilizers for seedlings and fruit trees, the biogas preparation device comprises a biogas fermentation pool, a gas outlet, a material inlet and a waste discharge outlet are formed inthe biogas fermentation pool, an automatic door is arranged on the waste discharge outlet, a heat-insulation wall is arranged on the periphery of the biogas fermentation pool, and a biogas slurry outlet and a biogas residue outlet are formed in the heat-insulation wall. The agricultural ecological system energy circulatory system has the advantages that plant planting, livestock breeding and the biogas fermentation pool are implemented with one another and are matched with one another, accordingly, resources can be reasonably configured and utilized, and the methane tank is heated by waste heat of biogas waste material in winter to solve the insulation problem of the methane tank with teh lowest energy consumption.