120results about How to "With electrical insulation" patented technology

The invention discloses a high-temperature proof insulating paint and making method, which comprises the following parts: 400-500g organic silica resin, 50-100g thermostable dye, 100-200g fill, 80-150 hollow ceramic microball, 30-60g bergmeal, 20-50g potassium titanate whisker, 100-150g solvent and 5-15g adjuvant.

The invention provides a hyperspectrum-based composite insulator aging operating state detection method. The method comprises the following steps of: firstly, obtaining a hyperspectral image of the composite insulator; then, preprocessing the obtained hyperspectral image, selecting a training sample, and establishing a composite insulator aging model; resolving the aging model parameter through the least squares method to obtain a composite insulator aging quantitative model; and finally, judging the degree of aging of the composite insulator through the aging model. The method can quantitatively describe the degree of aging of the composite insulator, and also can judge whether the composite insulator still has the electrical insulating performance according to the quantification on the degree of aging of the composite insulator, so as to change the degraded composite insulator in time.

The invention provides a safe and energy-saving lithium battery pack dual-mode thermal management system and method. The system comprises a battery pack, a battery pack shell, a liquid-cooling tube heat exchanger, and an external air-cooling fin with a fan. A micro heat pipe array is attached to the surface of a battery or a battery module, and a protruding portion of the micro heat pipe array isattached to the battery pack shell. The liquid-cooling tube heat exchanger is attached to the outer surface of the battery pack shell and is connected to an electric vehicle refrigeration system, anda substrate of the external air-cooling fin is attached to the outside of the liquid-cooling tube heat exchanger. According to the invention, the micro heat pipe array with high heat transfer and aircooling and liquid cooling modes are effectively combined, on one hand, the heat inside the battery can be effectively transmitted to the outside, the temperature is prevented from being too high, theuniform temperature of the battery is ensured, the heat dissipation efficiency is high, on the other hand, different systems are started in different states and temperatures, and the avoidance of thermal runaway and substantial energy savings are achieved.

The invention relates to an optical fiber bending loss principle-based wire strand breakage and damage detection method. The method comprises the following steps of: (1) fixing a sensing optical fiber for detection on a high-voltage power transmission wire at a certain angle; (2) transmitting detection laser to an incident end of the sensing optical fiber for detection by an optical time domain reflectometer; (3) returning a back Rayleigh scattering light signal to the optical time domain reflectometer by the sensing optical fiber for detection; (4) after receiving the back Rayleigh scattering light signal by the optical time domain reflectometer, performing sampling acquisition and analytic processing on the signal to obtain back Rayleigh scattering light power at each different position of the optical fiber transmission line and displaying a detection result curve on a panel of an oscilloscope of the optical time domain reflectometer; and (5) acquiring state information of the sensing optical fiber for detection, and further detecting and positioning strand breakage and damage existing on the high-voltage power transmission wire. Compared with the prior art, the method has the advantages of accuracy in positioning, capabilities of improving the polling efficiency of the power transmission line and the reliability of the power system and the like.

The invention discloses a local anodic oxidation method for the surface of a workpiece. The method comprises the following steps of: putting the workpiece into a pretreatment solution, and treating the workpiece for 20 to 30 seconds; washing and drying the pretreated workpiece; firmly sticking a polyimide adhesive tape to the oxidation-free surface of the workpiece, and removing bubbles on the adhesive tape and the surface of the workpiece; performing anodic oxidation treatment according to the conventional oxidation flow; and tearing down the adhesive tape on the surface of the oxidized workpiece, and wiping the residual adhesive on the surface of the workpiece by using an organic solvent. The local anodic oxidation method has the advantages of reducing the machining frequency, reducing the machining cost of the workpiece and avoiding the defects of poor repeated positioning precision and low product qualification rate; and the oxidation-free surface of the workpiece is effectively shielded by the polyimide adhesive tape.

The invention discloses a polyurethane microporous elastomer with characteristics of rubber and a preparation method thereof. The preparation method comprises the following steps: heating and mixing polyester polyol A1, polyester polyol A2, polyester polyol A3, a chain extender, tertiary amine or organic metal catalyst, an organosilicon foam stabilizer and a foaming agent in a reaction kettle to obtain a component A; mixing diisocyanate, polyester polyol B1, polyester polyol B2, polyester polyol B3 and a side reaction inhibitor in a reaction kettle to react, thereby obtaining a component B; and thoroughly mixing the components A and B, and reacting to obtain the polyurethane microporous elastomer. The polyurethane microporous elastomer with characteristics of rubber is suitable to be used as a sole material, and has the advantages of excellent processability, mechanical properties, hydrolysis resistance and low-temperature resistance. The prepared sole is light and comfortable; and meanwhile, a double-component system and a cast molding technique which are used are simple and easy to control, thereby enhancing the competitive power of the traditional sole materials, such as polyurethane microporous elastomer materials, rubber and the like.

The invention relates to a rotary pump, particularly in a wet running design, the electric motor rotor (7) of which drives the pump impeller (5) via the shaft (21) thereof and is surrounded by the motor stator (17). The motor stator and the pump impeller are surrounded by the pump and motor housing (1, 3), forming an intermediate space (22, 25), wherein at least one vibration-damping element (10, 12, 28) is disposed in the intermediate space and supports the motor stator (17) in the pump and motor housing.

The invention discloses a distributed temperature measurement system based on optical fiber radiation attenuation temperature dependency. The system comprises a light source, a coupler, a sensitive optical fiber, a photoelectric detector, a drive circuit, a detection circuit and a computer, the drive circuit drives the light source, the light source emits pulsed light, the pulsed light enters into the coupler, an output optical fiber of the coupler is connected with the sensitive optical fiber, backscattering and reflected light signals of optical fibers are output to the photoelectric detector through the coupler, the photoelectric detector measures the light signals to output the light signals to the detection circuit, the detection circuit converts the detected light signals to electrical signals and subjects the electrical signals to amplification processing to transmit the processed electrical signals to the computer, and the computer performs real-time data processing and display. The sensitive optical fiber is an optical fiber subjected to irradiation and annealing process and has the advantages of being small in size, light, flexible in structure, resistant to electromagnetic interference and electric insulating, the attenuation of the sensitive optical fiber has stable relation of dependency on temperature, and the system can be used for temperature measurement of an electrical power system with high voltage, large current, strong electromagnetic interference, narrow space and the like and is applicable to the fields of tunnel fire early warning, oil exploitation downhole temperature monitoring and the like.

The invention provides hard PVC structural foam which is mainly prepared from, by weight, 80-150 parts of PVC resin, 30-60 parts of isocyanate, 0.5-10 parts of a supercritical fluid foamer, and 0.5-5parts of water vapor. The invention also provides a method and a shaping mold for preparing the hard PVC structural foam. The method includes the steps of preparing a foaming green body, performing primary foaming and secondary foaming and producing finish product. The shaping mold includes a cylindrical mold side board and an upper mold plate and a lower mold plate which are respectively arrangedon the upper and lower ends of the cylindrical mold side board in a sealing manner. Pressure applying devices are respectively connected to the upper mold plate and the lower mold plate. A side wallof the cylindrical mold side board is provided with an air inlet hole and an air exhaust hole. The hard PVC structural foam has high strength, is light in weight, is high in rigidity, and is anti-corrosion, electric-insulation and microwave-permeable. The preparation method is short in time and high in work efficiency, and can shorten the whole process to within 2 days.

The invention discloses a method for manufacturing fiber reinforced resin based composite reinforcements, which comprises the following steps of: putting fibers in an impregnation device to carry out impregnation treatment; winding the fibers treated by the impregnation device by using a spiral winding device; putting the fibers subjected to winding by the spiral winding device into a sand adding device so as to add sand on the fibers; putting the fibers treated by the sand adding device into a gelling device for gelling; putting the fibers subjected to gelling into a curing device for curing; and putting the fibers subjected to curing into a post-curing device for post-curing, thereby obtaining a fiber reinforced resin based composite reinforcement. The fiber reinforced resin based composite reinforcement manufactured by using the method disclosed by the invention has the characteristics of electrical insulation, non-magnetism, good bonding property with cement concrete, acid resistance, alkali resistance, corrosion resistance, light specific gravity, high strength, weld-free continuous reinforcement, and the like.

The invention relates to the technical field of macromolecule adjuvants, in particular to an anti-dripping agent containing PTFE (polytetrafluoroethylene) and organic silicon and a preparation methodof the anti-dripping agent. The preparation method comprises the following steps: synthesis of organopolysiloxane core emulsion and preparation of the anti-dripping agent containing the PTFE and the organic silicon. By adding coated monomers into the organopolysiloxane core emulsion and PTFE emulsion to perform polymerization, the anti-dripping agent prepared by the preparation method not only hasrelatively good flame resistance but also has excellent anti-dripping performance, and is simple in process and low in cost.

The invention relates to a grid switching method of a control system for inner-city rapid rail vehicles and the control system. An AC (alternating current) or DC (direct current) high voltage signal input by a catenary is directly sent to an AC-DC dual-purpose electronic type voltage transformer after obtained by a pantograph, processed by the AC-DC dual-purpose electronic type voltage transformer and sent to locomotive related equipment in a DC or AC analog manner, and meanwhile, an AC or DC switching value signal is sent to the locomotive related equipment to be used as the unique signal for detecting the voltage system of a power supply grid and the grid voltage value. The control system comprises a high voltage head part and a control case part, wherein the high voltage head part switches 25 kV AC or 1.5 kV DC high voltage from the power supply grid into a proper voltage signal capable of being processed by a weakening device after resistive subdivision; then the control case transmits an input sampling signal to an AC analog output circuit or a DC analog output circuit to be output in an analog manner; the output signal is sent to the locomotive related equipment after amplified and intensified.

The invention discloses a thermal expansion pressure simulation test system and method for simulating warhead projectile explosive charge. The system comprises a charge simulation chamber, an expansion pressure sensor assembly, a sealing compaction nut, an explosive member, a constant temperature system, a temperature compensating fiber grating, a fiber demodulation system and a measurement control system. Projectile body explosive charge and semisolid state explosive thermal expansion pressure can be directly measured. An explosive test piece is arranged in a simulation chamber cylinder, theexplosive test piece is compacted by the expansion pressure sensor assembly, sealing compaction is exerted onto the expansion pressure sensor assembly, the simulation chamber cylinder is further sealed to form a simulation test projectile, the simulation test projectile is disposed in the constant temperature system, and projectile explosive charge thermal expansion pressure change is measured. The system is advantaged in that operation is simple, the measurement scope is large, measurement accuracy is high, good safety is realized, and a technical problem of direct measurement of projectile body explosive charge and semisolid state explosive thermal expansion pressure is solved.

The invention relates to a preparation method of a steam pipeline thermal insulation material, and belongs to the technical field of thermal insulation materials. A basalt fiber honeycomb fabric prepared from sepiolite and expanded perlite as heat preservation fillers by a respiration pattern method is adopted as a reinforcing material to prepare polyurethane foam prepared by compounding with polyurethane resin by a medium-temperature foaming method, the prepared steam pipeline thermal insulation material has good thermal insulation performance, and the basalt fiber honeycomb fabric is added,so that the tensile strength of the steam pipeline thermal insulation material is improved; the sepiolite and the expanded perlite have the advantages of low heat conductivity coefficient, high temperature resistance, acid resistance, alkali resistance, salt resistance, oil resistance, and the like; the prepared steam pipeline thermal insulation material has the advantages of small density, high heat resistance, small heat conductivity coefficient, high compressive strength and small shrinkage rate, and the steam pipeline thermal insulation material has the advantages of excellent thermal insulation performance, ultralow density, flame retardancy, good light transmittance and the like.

The invention relates to a high-elasticity epoxy resin which mainly comprises an epoxy resin and an elastic curing agent. The high-elasticity epoxy resin is characterized by comprising the following components in parts by weight: 420-480 parts of epoxy resin, 20-80 parts of flame retardant agent, 25-40 parts of quadrol, 8-47 parts of accelerant, 3-26parts of binding agent, 11-32 parts of diluent and 0-17 parts of temperature resistant toughening agent. Because the high-elasticity epoxy resin adopted as an electronic potting material has the characteristics of elasticity, vibration prevention, moisture prevention, temperature resistance, heat conduction, flame retardance, electric insulation, and the like, the high-elasticity epoxy resin can ensure the long-term reliability of electronic products. The high-elasticity epoxy resin has the advantages of silicon rubber, can maintain the characteristics of the epoxy resin, has reduced cost and widely expanded application range and adds a novel potting material for the electronic industry.

The invention relates to a method for real-time monitoring of a crack on a composite-repaired structure based on a FBG sensor. The method comprises the following steps: step 1, selecting a test piece;step 2, carrying out structural mechanics analysis on the test piece and analyzing stress on two ends of the test piece; step 3, sticking the FBG sensor on an aluminum alloy thin plate (a 2A12 thin plate) according to finite element simulation results; step 4, mounting the aluminum alloy thin plate repaired by a composite and adhered by the FBG sensor on a fatigue testing machine for fatigue crack propagation tests; step 5, analyzing the wavelength changes of the crack after installation of the FBG sensor on the tip of the crack; and step 6, repeating steps 1-5. The method provided by the invention carries out real-time monitoring on the process of crack propagation and is more visual and effective than other methods. The FBG sensor used in the method has the advantages of small size, high sensitivity, electromagnetic interference resistance, corrosion resistance, high reliability, good compatibility with the composite, etc.

The invention discloses a basalt fiber anti-cracking coating and a preparation method thereof. The basalt fiber anti-cracking coating is prepared from the following raw materials in percentage by mass: 1 percent of basalt fiber, 20 percent of waterborne fluorocarbon emulsion, 10 percent of silica sol, 60 percent of sand, 1 percent of thickening agent, 1 percent of mildew preventive, 2 percent of silane waterproofing agent and the balance of water. The preparation method of the basalt fiber anti-cracking coating comprises the following specific steps: I, raw material preparation; II, stirring;III, blending. The basalt fiber anti-cracking coating has the advantages of wide raw material source, simple preparation process and low investment cost on production equipment; the basalt fiber is added in the coating, so that the strength is enhanced effectively; the basalt fiber anti-cracking coating also has the excellent performance of electric insulation, corrosion resistance and high temperature resistance; the waterborne fluorocarbon emulsion is taken as a main film forming material of a waterborne fluorocarbon coating, so that the basalt fiber anti-cracking coating has excellent weather resistance, water resistance, pollution resistance and chemical resistance; the basalt fiber anti-cracking coating has the advantages of dirt resistance, dust resistance, aging resistance, fire retardancy, permeability, waterproof layer and excellent cracking resistance.

The invention discloses a heat conduction film and a manufacturing method thereof. The heat conduction film successively comprises, from bottom to top, a bottom layer of a flexible base material, a structural layer and a surface layer of the flexible base material. The structural layer is formed by geometric blocks which are distributed on a bottom layer surface in a protruded mode. Connected grooves are formed between the adjacent geometric blocks. A thickness of the structural layer is 30-50 microns. A width of each groove is the 0.5-3 microns. A pressure working medium is filled in each groove and each groove is full of the pressure working medium. Groove ports around the heat conduction film are plugged. Pressure of the pressure working medium in each groove is 0.5-2MPa. The heat conduction film of the invention has a series of advantages that heat conductivity and an insulating property are possessed; a suitable field is wide, manufacturing cost is low and so on.

Provided is a heat-conductive elastomer composition that is useful for a heat-dissipating member of an electric or electronic part and the like. Elastomer heat conductivity is improved by mixing an elastomer composition, which is primarily a styrene elastomer, with a heat-conductive filler formed from an aluminum hydroxide, the surface of which is coated with an organic coupling agent, and / or a heat-conductive filler formed from a magnesium oxide obtained by coating the surface of deactivated magnesium oxide in the form of magnesia clinker with an inorganic substance and / or an organic substance.

The invention relates to a high-temperature-resistant heat-insulation fireproof sleeve and a preparation method thereof. The high-temperature-resistant heat-insulation fireproof sleeve comprises a framework layer, the outer surface of the framework layer is wrapped with a heat-insulation layer, the outer surface of the heat-insulation layer is provided with a braided layer, and the outer surface of the braided layer is provided with a coating layer. The preparation method of the high-temperature-resistant heat-insulation fireproof sleeve comprises the following steps of (1) preparing a flexible hose from a heat-resistant material through a pipe extruder to serve as the framework layer; (2) coating aerogel on the outer surface of the framework layer to serve as the heat-insulation layer; (3) weaving heat-resistant fibers on the outer layer of the heat-insulation layer by using a three-dimensional weaving process to serve as the braided layer 3; and (4) laminating flame-retardant thermoplastic resin on the outer layer of the braided layer to serve as the coating layer 4. The high-temperature-resistant fireproof sleeve prepared through the method has the advantages of high temperatureresistance, good heat insulation property, good flexibility, non-flammability, aging resistance, electrical insulation, water resistance, oil resistance and the like, can be exposed in an environmentof -50 DEG C to 260 DEG C for a long time, can be continuously used for 15-20 minutes in an environment of 1030 DEG C, and can be used for 15-30 seconds at the high temperature of 1600 DEG C; and thehigh-temperature-resistant fireproof sleeve is used for conveying inflammable fluid hazardous chemicals such as an oil conveying pipeline and a chemical conveying pipeline, potential safety hazards can be greatly reduced, and accident losses are reduced to the minimum.

The invention discloses a water-lubricated bearing material and a preparation method thereof, and belongs to the technical field of composite materials. The problem that an existing bearing has poor adaptability, large wear and the like under severe working conditions is solved. The water-lubricated bearing material is prepared from the following components in parts by weight: 20-30 parts of phenolic resin, 40-50 parts of nitrile rubber, 1-10 parts of graphene powder, 20-30 parts of basalt fiber, 0.1-1 part of a vulcanizing agent, 5-10 parts of a softener and 10-20 parts of a lubricating agent. The water-lubricated bearing material has the advantages of self-lubrication, high load-bearing, anti-fouling adhesion, green and pollution-free and the like through the synergistic action of the components, is suitable for working in internal navigation vessels with poor water quality and containing sediment, can work without water in short time, is low in noise, good in shock absorption effect, easy in formation of a water film and low in friction coefficient of water lubrication, and can directly and completely replace imported products.

The invention discloses a prefabricated plastic runway coiled material and a preparation method thereof, and belongs to the field of plastic runways. The prefabricated plastic runway coiled material is prepared from SEBS, SBS, white oil, calcium carbonate, ethylene propylene diene monomer, grafted PP, silicone master batch, TPU, PP, an antioxidant and a pigment, wherein the model of SEBS is specifically CH1320; the model of SBS is specifically CH1303; the mesh number of calcium carbonate is 400 to 1250 meshes; the model of ethylene propylene diene monomer is 3080P; the model of PP is specifically K80; and the antioxidant is an antioxidant 1010. The prepared plastic runway coiled material is good in elasticity and impact capacity, the safety of athletes can be guaranteed, the sports effectof the athletes can be enhanced, and the plastic runway coiled material is safer and healthier.

The invention discloses a dry-wet separated vertical lithium battery pack hot liquid cooling type management system and method. The system comprises one or more groups of vertical batteries and / or battery modules in the battery pack, a battery pack shell and a liquid cooling plate-tube heat exchanger, a micro heat pipe array is transversely attached to the front surface of the battery and / or the battery module; the length of the micro heat pipe array is larger than the width of the battery and / or the battery module, the two ends of the micro heat pipe array are bent, the micro heat pipe arrayattached to the front face of the battery and / or the battery module serves as a heat transfer section, and the bent vertical part is attached to the two side faces to serve as an evaporation section and a condensation section respectively and is also attached to the corresponding battery pack shell. The battery pack shell surrounds the battery pack and is of a closed structure, and a heat conduction partition plate is at least arranged at the position corresponding to the condensation section; the liquid cooling plate-tube heat exchanger is at least correspondingly attached to the outer surface of the heat conduction partition plate and connected with the refrigerating system, and a base plate of the liquid cooling plate-tube heat exchanger is sealed. The system has the advantages of highheat dissipation efficiency, dry-wet separation and liquid leakage prevention.

The invention relates to a coupling agent, a porous carburizing coating fiber and a preparation method thereof, and belongs to the technical field of carbon fiber material preparation. The inherent low-strength problem of an existing activated carbon fiber is solved. The preparation method of the porous carburizing coating fiber comprises the following steps that 1, a basalt fiber is subjected tosurface acid and alkali etching treatment; 2, the surface modified basalt fiber is coated with a tetrahydrofuran solution of bis(2-furylmethoxy)dimethylsilane and a tetrahydrofuran solution of furaldehyde and furan methanol condensation resin, and the coating layer is further polymerized and solidified; and 3, the basalt fiber after coating is carbonized and activated to obtain the basalt fiber with a porous carburizing coating. According to the preparation method, the basalt fiber is adopted as a matrix fiber, a porous carbon layer is formed by surface carburizing treatment, thus the porous carburizing coating fiber has the pore characteristics of the activated carbon fiber, and meanwhile has good mechanical strength of the basalt fiber.

The invention provides a dual-layer three-dimensional noise reduction protection screen which comprises a plurality of flattop sound absorption wedges and a resonance noise elimination structure. The resonance noise elimination structure is composed of a three-dimensional support and a metal sheet. The three-dimensional support is of a box-type structure, the metal sheet is installed on one side of the three-dimensional support, the flattop sound absorption wedges are installed on the other side of the three-dimensional support, the metal sheet is provided with a plurality of micropores, a middle cavity of the three-dimensional support is filled with in-situ resonance materials, the flattop sound absorption wedges are of a pointless tetrahedral cone structure, and an inward-concave connecting groove is formed in the bottom of the protection screen. The dual-layer three-dimensional noise reduction protection screen is capable of effectively lowering low-frequency noise, easy to maintain, convenient to renew and longer in service life.