108results about How to "Has a shielding effect" patented technology

The invention belongs to the technical field of surface corrosion prevention and discloses a water-based high-corrosion-resistance coating with excellent stamping performance and a preparing method and application of the water-based high-corrosion-resistance coating. The coating comprises, by mass, 25-60 parts of water-based resin, 2-8 parts of water-based cross-linking agent, 0.1-0.5 part of catalyst, 4-10 parts of cosolvent, 0.1-1 part of flatting agent, 0.1-10 parts of lubricating agent, 2-10 parts of water-based toughening resin, 0.1-0.5 part of defoaming agent, 0.5-3 parts of thickening agent and the balance water, and the total mass parts of the components are 100 parts. According to the water-based high-corrosion-resistance coating, the water-base resin serves as film forming matter, so that good construction performance is achieved, curing is quick, super corrosion resistance can be obtained when the thickness of the coating is 2-5 micrometers, the performance of resisting neutral salt mist is longer than 2,000 hours, resistance to acid salt mist is longer than 500 h, the corrosion grade can reach 9.8 or higher, and the salt mist resisting performance of the coating is maintained unchanged after stamping or bending is carried out.

The invention discloses a configurational tree-shaped heat pipe radiator. The radiator consists of a high-thermal conductivity base plate, liquid-absorption cores, a radiating fin and working media, wherein narrow cavities are formed inside the base plate; the radiating fin is connected with the narrow cavities; communicated cavities are formed inside the radiating fin; the liquid-absorption cores are filled in the narrow cavities; the working media are filled in the narrow cavities and the communicated cavities; the radiating fin has a configurational tree-shaped structure and consists of a main communicated channel and at least two forked connection fins; the forked connection fins are arranged at the periphery of the main communicated channel circularly; and the communicated cavities inside the forked connection fins are communicated with the main communicated channel. The heat pipe radiator can quickly remove the heat which is generated by a plurality of (a single) local high-temperature heat flow heat source points (point) through phase change of the working media, so that local hot points are effectively eliminated, temperature of a heating surface of the heat pipe radiator is reduced, and safe, stable and efficient operation of electronic equipment is further guaranteed.

The invention relates to an anti-aging additive for improving asphalt aging characteristic and a preparation method of an anti-aging asphalt. The anti-aging additive is characterized by being prepared by evenly compounding organic montmorillonite, an antioxidant and a light stabilizer in a mechanical stirring manner, wherein the anti-aging additive comprises the following raw materials by mass percent of 72% to 84% of organic montmorillonite, 8% to 14% of antioxidant and 8% to 14% of light stabilizer. The anti-aging asphalt is prepared by the melt blending of 90% to 99% of asphalt and 1% to 10% of the anti-aging additive. According to the performance characteristics of the different raw materials in the invention, the anti-aging additive which has the good thermal stability and can obviously improve the thermo-aging resistance, the oxidative-aging resistance and the light-aging resistance of the asphalt is compounded; the anti-aging asphalt which has the good compatibility is prepared from the anti-aging additive, so that the synergetic effects on improving the thermo-oxidative aging resistance and the light-oxidative aging resistance of the different asphalts are achieved. The anti-aging asphalt prepared from the anti-aging additive is not only good in thermo-oxidative aging resistance but also excellent in light-oxidative aging resistance.

A shelter wallboard with radar stealth and electromagnetic shielding functions. The shelter wallboard sequentially comprises an outer mask, wave absorbing sandwich layers, a heat preservation material layer and an inner mask from the outside to the inside, and frames are arranged between the outer mask and the inner mask. The shelter wallboard is characterized in that the wave absorbing sandwich layers include three layers, a first layer is a honeycomb bottom layer, a second layer is a middle layer made of mixture preimpregnation materials of short carbon fiber and carbon fiber fabric, and a third layer is a surface layer made of epoxy resin. The shelter wallboard has a good stealth effect on radar detection, can shield electromagnetic wave inside and outside of a shelter and is also in accordance with other relevant standards of the shelter.

The utility model relates to a dry-type composite insulating wall-piercing bushing electrical insulation performance test lifting platform, which belongs to the technical field of high-voltage testing in the electric power industry, and in particular relates to a dry-type composite insulating wall-piercing bushing electrical insulation performance test lifting platform. The invention provides a high-efficiency and accurate dry-type composite insulating wall-piercing bushing electrical insulation performance test lifting platform. The invention includes a pressure equalizing cap at the end of a dry-type composite insulating wall bushing, a flange pressure equalizing ring, an insulating outer cylinder and an insulating inner cylinder. On the metal base support plate, a hydraulic pump is arranged on the metal base support plate in the middle of the insulating outer cylinder. The upper end of the hydraulic pump is connected with a hydraulic cylinder. The outlet of the hydraulic pump is connected with the hydraulic oil inlet of the hydraulic cylinder. The middle parts of the transverse connecting arms are connected.

The invention discloses a pressure sensor which comprises a substrate (1), a metallic resistor strain foil (2) and a lead wire (4). The resistor strain foil (2) is arranged on the substrate (1), and the lead wire (4) is connected with the resistor strain foil (2). The pressure sensor further comprises a shielding protective layer (3) and a shielding wire (5). The shielding protective layer (3) is connected with the substrate (1) and the shielding wire (5) respectively, and the shielding wire (5) is led out of the substrate (1). The shielding protective layer (3) is used for preventing the metallic resistor restrain foil from being damaged and meanwhile avoiding electromagnetic interference. The shielding wire (5) is used for being connected with metallic outer shells of outside equipment, and electromagnetic interference signals are discharged through the shielding wire (5). According to the pressure sensor, anti-interference design is used, and high anti-interference capacity is achieved.

The invention relates to a shielded type printed circuit board, which comprises a printed circuit board, a shielding film and a strengthening component. The printed circuit board comprises a base component and an insulation film, wherein a circuit pattern used for ground connection is formed on the base component, the insulation film is arranged on the base component, the circuit pattern used for ground connection is covered by the insulation film, and an electronic component is connected at the installation place of the lower surface of the base component. The shielding film arranged on the printed circuit board comprises an electric conduction layer and an insulation layer, wherein the electric conduction layer is equipotential with the circuit pattern used for ground connection, and the electric conduction layer is arranged on the printed circuit board and is used for covering a part of a zone or the whole zone opposite to the installation place; and the insulation layer is arranged at the electric conduction layer. The strengthening component has electroconductivity and is arranged on the shielding film at the zone opposite to the installation place. The strengthening component is jointed with the insulation layer by electric conductivity cement containing spherical electric conductivity particles. The thickness of the insulation layer is less than the raising length of the electric conductivity particles from the electric conductivity cement under the joint state of the electric conductivity cement and the insulation layer, and the electric conductivity particles are in contact with the electric conduction layer under the joint state of the electric conductivity cement and the insulation layer.

The invention discloses a manufacturing method for shield type differential via holes. The manufacturing method comprises the steps of arranging an upper reference layer and a lower reference layer that are distributed at intervals on an insulating dielectric layer of a PCB; manufacturing a ground hole in the insulating dielectric layer of the PCB, wherein the ground hole is connected with the two reference layers; filling the ground hole with resin; arranging a first differential transmission line above and below the ground hole separately; arranging a second differential transmission line above and below the ground hole separately; and manufacturing two differential signal via holes that are formed at intervals in the PCB. The invention also discloses an impedance calculation method for the differential via holes. The impendence continuity of the differential via holes is realized by the manufacturing method provided by the invention; and in addition, the impendence value of the differential via holes is worked out, so that the accurate design and control for the impendence of the differential via holes can be facilitated.

A flame-retardant composite fireproof cable is characterized by comprising at least two cable cores, wherein each cable core is composed of twisted copper wire conductors each coated with a mica fireproof layer, an insulating damp-proof layer, an aluminum alloy interlocked armor barrier layer and a flame-retardant layer sequentially from inside to outside; the flame-retardant composite fireproof cable is composed of a cabling wrapping belt, an oxygen isolating layer, a ceramic fireproof layer, an interlocked armoring layer and a flame-retardant outer protective layer all of which are sequentially coated outside each cable core from the inside to the outside, and a flame-retardant filling material filled between the cable cores and the cabling wrapping belt.

The invention relates to modified epoxy-connected paint and a preparing method thereof. An A component of the paint is prepared by adding epoxy resin into a mixed solvent of xylene, n-butanol and cyclohexanone, adding copolymer of vinyl chloride and vinyl isobutyl ether, chlorinated rubber, acrylic resin, wet-method sericite, mica iron oxide, fumed silica, talcum powder, titanium dioxide, a polymethylalkyl siloxane solution and polyamide wax, mixing, stirring, and grinding. A B component of the paint is prepared by mixing a cashew nut shell oil modified phenolic aldehyde amine curing agent and a phenolic aldehyde amine curing agent, and stirring uniformly. During using, the A component and the B component are mixed uniformly. The paint can be used for intermediate paint of anti-corrosive primer, and antifouling paint, or chlorinated rubber finish or decorative finish so as to ensure good adhesive force.

The invention discloses fluorination bisphenol-type glycidyl ether and a preparing method and application thereof. The preparing method of the fluorination bisphenol-type glycidyl ether includes the steps that N-propyl perfluor octyl sulfonyl ammonia potassium glutamate and bisphenol-A diglycidyl ether are taken to be added into ethyl alcohol, an ethanol sulfate solution of 10% and a catalyst are added, the mixture is subjected to water-bath heating to be at 55 DEG C-80 DEG C, sodium bicarbonate is added after the reaction is completed, pressure reducing and distillation are carried out to remove ethyl alcohol, and washing and drying are carried out. The fluorination bisphenol-type glycidyl ether is applied to a graphene coating which comprises 75-85 parts of first ingredients and 15-25 parts of curing agent, the first ingredients comprise 30.0-45.0 parts of bisphenol-A epoxy resin, 0.5-5.0 parts of graphene, 0.5-2.0 parts of epoxy siloxane coupling agent, 2.0-6.0 parts of reactive diluent, 5.0-10.0 parts of fluorination bisphenol-type glycidyl ether, 3.7-7.3 parts of assistant and 31.0-55.0 parts of pigment and filler. The coating is low in production cost and good in heat dispersion performance, brightness, abrasive resistance and chemical resistance.

In a semiconductor device of the present invention, a protection diode for protecting a device is formed on an epitaxial layer formed on a substrate. A Schottky barrier metal layer is formed on a surface of the epitaxial layer and a P-type diffusion layer is formed at a lower portion of an end portion of the Schottky barrier metal layer. Then, a P-type diffusion layer is formed to be connected to a P-type diffusion layer and is extended to a cathode region. A metal layer to which an anode electrode is applied is formed above the P-type diffusion layer, thereby making it possible to obtain a field plate effect. This structure reduces a large change in a curvature of a depletion layer, thereby improving a withstand voltage characteristic of the protection diode.

The invention provides a method of fumigation treatment on a breading house of scatter-fed black pigs, and relates to the field of black pig breeding. The method comprises the steps that 25 parts by dry weight of asiatic wormwood, 3 parts by dry weight of radix gentianae, 5 parts by weight of radix angelicae dahuricae stems, 15 parts by weight of charcoal, 5-8 parts of loess which are dried in the sun are selected to be made into a fuel composition, the fuel composition is put into a fire pan and lighted to be fumigated by being put into a cave, when fumigation is conducted, the opening of the cave is sealed, the fire pan is connected with a rope which leads to the outside of the cave, the fire pan is made to move forwards by 20-30 cm by pulling the rope every five minutes, and the fire pan only needs to move to the cave for one time. The fumigation is conducted on the interior of the cave through hot flue gas produced by the fuel composition in the fire pan, germs on the surface of the cave or 5 cm deep inside the soil can be killed, mice and ants can be expelled, and the mice and the ants are prevented from opening a cavity to make a nest near the cave. For the black pigs in the cave, the functions of clearing heat, eliminating dampness and purging liver and gall fire are achieved, and dampness and chilliness are prevented from entering the bodies of the black pigs.

The radio vehicle network gateway is used in coach bus, railway train and other high speed traffic facility. The mobile terminals in the carriages constitute the radio vehicle network. The gateway consists of WPAN module, antenna inside carriage, microprocessor, PCM coding and decoding device, cellular network module, D / A converter, variable gain RF powr amplifier and quarter wave antenna outside the carriage. The microprocessor and PCM coding and decoding device are connected separately with WPAN module and cellular network module; the D / A converter input is connected to the microprocessor; the D / A converter and the cellular network module output is connected the variable gain RF power amplifier; the output end of variable gain RF power amplifier is connected to the quarter wave antenna and RF input end the quarter wave antenna is connected to the cellular network module.

The invention discloses a polycrystalline silicon production method and device by pyrogenation of silane. The production device comprises an immersion bell and a disc bottom plate, wherein a reaction region is formed by the immersion bell and the disc bottom plate; silicon rods are arranged hexagonally; a plurality of air inlet guide cylinders are arranged on the bottom plate; nozzles are formed on the side walls of the guide cylinders; raw material gas enters the reaction region from the nozzles and is directly sprayed to the surfaces of the carbon rods; reaction tail gas is exhausted from the top of an immersion bell reactor or enters an outlet guide cylinder to be discharged. In production by the device, low-temperature reaction gas is directly sprayed to the surfaces of the carbon rods where deposition reaction happens, so that the periphery of the high-temperature silicon rods is cooled. A severe synergistic effect is obtained for the heat and mass transfer; the guide cylinders among the silicon rods have low-temperature isolating effects; the raw material gas is pre-heated by radiation heat, so that the heat efficiency is improved and the effect of reducing the energy consumption is obtained.

The invention relates to the processing field of building materials-man-made synthetic stone, in particular to a manufacturing method of nano synthetic travertine, solving the problems that the surface of current man-made synthetic stone lacks particle sealing and the inner part lacks a microcellular structure. The manufacturing method comprises the following steps: 1. aggregating and stirring, mixing intensively mineral sand, stone powder and binding agent; 2. feeding and mixing, adding light material-vitrified micro beads into the mixed base stock and mixing intensively; 3. distributing materials comprehensively, simultaneously spraying mixed color pastes onto the mixed base by utilizing an air sprayer; 4. vibrating and moulding, sawing and grinding to obtain a great plate with shiny side; 5. combining surface layer: preparing nano polyester surface layer material, spraying the mixing material onto the plate surface of a burnish great plate by utilizing the air sprayer; and 6. drying and slitting. The invention has reasonable technological process and strong actionability; the processed synthetic travertine products have the advantages of light weight, heat preservation, antibacterium, self-cleaning and representation of the romantic charm of natural travertine, thus being applicable to decorations of wall surface, ground surface and table facet of medium and high grade.

The invention relates to a corrosion-resistant coating material for navigation marks and a preparation method of the material. The raw materials of the coating material comprise the following components in parts by weight: 24-32 parts of epoxy resin, 14-22 parts of polyester, 1-3 parts of titanate coupling agents, 6-15 parts of graphene, 10-20 parts of zinc powder, 35-45 parts of siloxane oligomers and 4-12 parts of antimicrobial agents. The preparation method is simple to operate, and graphene and zinc powder are evenly dispersed in a mixture; the coating material solves the problems that a coating film of the coating material for the navigation marks is not dense enough, the waterproof and permeability resistance is poor, the anticorrosion performance is poor, and the adhesion force is poor in the prior art; and through the synergistic effect of all components, the corrosion resistance, the friction resistance, the water resistance, the weather resistance and the impact resistance ofthe coating are improved in the seawater environment , and meanwhile, the service life of the navigation marks is prolonged.

The invention discloses an anti-static silk fabric. The anti-static silk fabric is a blended product of cotton fiber, silk fiber, bamboo charcoal fiber, carbon conductive fiber and coffee carbon fiber. The anti-static silk fabric has the advantages that according to the fabric prepared through the method, the cost of a silk fiber product can be reduced, light, luster, a skin-friendly property, fabric balling up and sagging can be improved, and the fabric is smooth, neat, anti-static, soft and comfortable in hand feeling, light in texture, solid and durable. The carbon conductive fiber in the silk fabric can effectively prevent the accumulation of electrostatic charges, is washing resistant, has a certain shielding effect on an electromagnetic field, thus the anti-static silk fabric has good and durable anti-static performance, reduces harm of electromagnetic radiation to the human body, and has a health care effect. The fabric effectively prevents adsorption on dust in the wearing process, and keeps the attractiveness of the clothes.

To simply realize fixing of cores and countermeasures against noises in an inductance element.The inductance element is mounted to a wiring board. A pair of cores 3, 4 are fitted into a coil bobbin 2, to which a winding is formed. The cores are clipped with a fixing metal fitting 5 made of metals and incorporated. The fixing metal fitting 5 has a shielding function and functions as a shield, to interrupt leakage magnetic fluxes of the inductance element. Also, since a terminal part for fixing to the wiring board 7 is provided to the fixing metal fitting 5, mounting state is reinforced.

The invention relates to an aluminium-plastic composite tube for a cable. The tube comprises a first plastic layer, a bonding layer, an aluminium alloy layer, and a second plastic layer successively from inside to outside. The elongation rate of the aluminium alloy layer is larger than 10%, the tensile strength is larger than 150MPa, and the rigidity is 40 to 50HV. According to the invention, the aluminium-plastic composite tube can be used as a cable casing tube of an automobile, thereby reducing the weight of the automobile body; a certain shielding effect on the electromagnetic interference can be realized; the corrosion-resistant and anti-rust performances are excellent; and the service life is long. Because no bonding layer is arranged between the aluminium alloy layer and the second plastic layer, the second plastic layer at the surface of the mounting port can be stripped easily, so that installation becomes convenient.

The invention discloses fluorine-containing polyaspartic acid ester resin and a synthesis method thereof and relates to the technical field of synthetic resin. The method is mainly characterized in that a fluorine-containing group is introduced on the basis of an existing polyaspartic acid ester resin system, that is, fluorine is used for modification. Thus, fluorocarbon bonds in the resin can reduce surface tension, improve water contact angle, enhance the hydrophobic property of a material and improve surface pollution resistance and icing resistance. Besides, fluorine atoms and carbon-carbon bonds form a spiral structure having a shielding effect on a main chain, so that in the molecular structure, besides the coronary structure of polyaspartic acid ester, more spiral structures can further improve the protection effect on the main chain, and the risk of damage of the main chain is reduced through dual insurance. The resin is particularly suitable for preparation of high-performanceanticorrosive coatings resistant to wear, aging, gloss loss, color change, high temperature and the like.

The invention discloses a Collapsible volume array type low-frequency transformer substation noise nephogram test device and a test method. The device comprises a movable pedestal, a fixed disk, a floating disk and several array arms; the fixed disk is mounted on the movable pedestal through a mounting rack, a track is arranged on the fixed disk, the floating disk is mounted on the track, and a camera is arranged on the fixed disk; each array arm is connected on the fixed disk through hinge joint, each array arm is connected with the floating disk through one connection rod, and two ends of the connection rod are respectively connected with the array arm and the floating disk through hinge joint; each array arm is provided with several sound sensors; and the camera and a signal output endof each sound sensor both are connected with a data acquisition processing device. The array arms of the device provided by the invention can be collapsed and keep constant size, movement of the wholedevice can be realized through the movable pedestal, a virtual large-size array can be synthesized through phase compensation and special position compensation, and consequently, relatively accuratetest for the low-frequency noise in the transformer substation can be realized.

The invention discloses high-density tungsten alloy heat and humidity resistant anticorrosive paint which is composed of priming paint and finishing coat, wherein the priming paint is composed of isopropanol, softened water, fluoroalkyl silane and acetic acid; the finishing coat is composed of a component A and a component B; the component A is composed of epoxy resins, lemon yellow, titanium dioxide, talcum powder, kaolin, mica powder, a dispersing agent, a flatting agent, a mixed solvent and the like; and the component B is composed of polyisocyanates, a mixed solvent and a catalyst. In the using process, the tungsten alloy is subjected to dip-coating treatment by using the priming paint and then coated by the finishing coat. The high-density tungsten alloy subjected to anticorrosive coating can meet the requirement of long-term heat and humidity resistance, so that the tungsten alloy can be used for a long time in a hot and humid environment.

The invention provides a scallop meat-containing compound seasoning and a preparation method thereof. The preparation method comprises the following steps of firstly, taking fresh scallops as raw materials, and performing cleaning, short-time steaming with boiling water and shelling to obtain scallop meat; secondly, degreasing the scallop meat and preparing meat paste; thirdly, carrying out enzymolysis treatment on the meat paste by neutral protease, bromelain and papain to obtain an enzymatic hydrolysate; and finally, mixing the enzymatic hydrolysate with tricholomagambosum enzymatic hydrolysate and pre-fermented fresh tea leaves, steaming a mixture with boiling water to be cooked, performing cooling, adding isomaltitol, inoculating aspergillus oryzae, saccharomycetes and bifidobacteria for fermentation, and performing post-treatment to obtain the solid compound seasoning. The compound seasoning has extremely good water solubility, effectively removes the fishy smell of the scallop meat, and remains the unique flavor of the scallop meat.

The invention relates to a circuit converting device, in particular to a shield wiring base. The shield wiring base aims to reduce or eliminate the adverse effect on the frequency characteristic of an alternating-current resistor from inductance and capacitance guided by the wiring base to the greatest extent, and improve use power of the alternating-current resistor. The shield wiring base mainly comprises the wiring base upper end, the wiring base lower end and a conducting rod, wherein the wiring base upper end is composed of an upper end metal ring and a polyoxymethylene material, the wiring base lower end is composed of a lower end metal ring and a polysulfone material, and the conducting rod penetrates through the wiring base upper end and the wiring base lower end, so that the upper portion of the conducting rod extends out of the wiring base upper end and the lower portion of the conducting rod extends out of the wiring base lower end. The shield wiring base is applied to alternating-current products, high-value direct-current resistance products and instruments with voltage less than 2kV, is wide in application range, improves the safety performance of electric appliances, and has good economic value and environmental protection value.

The invention relates to woven bags and particularly discloses an aging resisting plastic woven bag. The aging resisting plastic woven bag is prepared from the following raw materials in parts by weight: 50 to 80 parts of polypropylene, 30 to 40 parts of polystyrene, 15 to 22 parts of epoxy resin, 5 to 13 parts of an antiager, 3 to 7 parts of dibutyl phthalate, 3 to 8 parts of nano calcium carbonate, 2 to 4 parts of ferrous sulfate, 0.5 to 2.5 parts of a coupling agent, 0.6 to 1.5 parts of zinc stearate, 1.5 to 4 parts of quartz powder, 3 to 7 parts of an antioxidant, 1 to 5 parts of a dispersing agent and 3 to 7.5 parts of a defoaming agent. The aging resisting plastic woven bag disclosed by the invention has excellent aging resistance.

The invention relates to a current sensor auxiliary device having an SOC (system on chip) computing function. The current sensor auxiliary device comprises a current sensor, a power supply module, an AD collecting circuit, a microprocessor, a CAN (controller area network) controller, a CAN receiver-transmitter and a jack, wherein, a signal end of the current sensor is connected with the AD collecting circuit, a signal output end of the AD collecting circuit is connected with the microprocessor, and the microprocessor is connected with the CAN receiver-transmitter. The current sensor auxiliary device is connected onto a CAN bus of a BMS (battery management system) main board and communicated in a CAN bus manner, so the current sensor auxiliary device has the characteristics of high transmission speed and strong interference resistance; the SOC value is calculated by utilizing the collected current through an ampere-hour integral method, and the SOC computing is realized through a high-speed and high-precision manner; and all parts are integrated, so that the zero-distance collection of a current signal can be realized, and the influence of the electromagnetic interference of a finished automobile on a current collection wire can be prevented and reduced.

The invention relates to anti-electromagnetic radiation dry-mixed mortar using barium slag. The dry-mixed mortar is prepared by mixing the following raw materials in parts by weight: 40 to 55 parts ofsolid solution, 15 to 25 parts of iron tailings, 20 to 38 parts of gypsum, 0.2 to 0.5 part of cellulose ether, 0.1-1.5 parts of silicon carbide fibrous crystal, 0.05 to 0.6 part of foaming agent, 0.2to 1 part of graphite, and 0.04 to 0.06 part of retarder, wherein the total amount of all the components satisfies 98 to 102 parts, and the solid solution is prepared by mixing iron tailings, bariumslag and boric oxide in a mass ratio of (1-1.4):(6-6.6):(0.012-0.02). The anti-electromagnetic radiation dry-mixed mortar using barium slag provided by the invention has good radiation resistance andexcellent mechanical properties, can be widely applied to industrial and medical radiation-resistant engineering, and uses industrial waste to bring benefits to the society.