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21results about How to "High electromagnetic shielding" patented technology
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Flexible flame-retardant indoor photoelectric composite cable with multi-layer composite compression-resistant structure
ActiveCN224177137UStable internal support structureimprove protectionInsulated cablesInsulated conductorsSilicone GelsElectrical conductor
The utility model relates to a flexible flame-retardant indoor photoelectric composite cable with a multilayer composite compression-resistant structure, which comprises a central supporting unit, a cable core assembly, a composite reinforcing layer, a flame-retardant layer and an outer sheath which are sequentially arranged from inside to outside, the adjacent elastic rods are bonded through hot melting to form a 90-degree orthogonal supporting structure, the cable core assembly comprises optical fiber units and power conductors which are symmetrically distributed in four quadrants of a central supporting unit, one optical fiber unit and one power conductor are arranged in each quadrant, and the four macromolecule elastic rods arranged in a cross shape form a supporting framework. A stable internal supporting structure is provided for the whole optical cable, it is ensured that the optical cable structure is not prone to deformation in a complex environment, the section of the macromolecule elastic rod is fan-shaped, the containing groove is filled with thixotropic silica gel, the buffering and damping effect is further enhanced, internal assemblies can be better protected, and the optical cable is suitable for different installation and use environments.
Owner:JIANGSU YOUMI INTELLIGENT TECH CO LTD
Electromagnetic shielding composite film with gradient structure and preparation method thereof
ActiveCN117841501BHigh electromagnetic shieldingImprove barrier propertiesSynthetic resin layered productsDomestic articlesFiberPolymer science
This invention relates to the application of electromagnetic shielding composite materials, specifically to an electromagnetic shielding composite film with a gradient structure and its preparation method. Using a polymer film as the core layer, electromagnetic functional layers are sequentially deposited on both sides of the polymer core layer, and a carbon fiber felt is composited on at least one side, resulting in an electromagnetic shielding composite film with excellent electromagnetic shielding performance. The gradient multilayer structure design of this invention utilizes the principles of impedance mismatch at different interfaces and the skin effect to effectively improve the multiple reflections of electromagnetic waves between different functional layers. Furthermore, the type of polymer core layer can be changed according to different needs; using a polymer-based high-barrier film as the core layer can yield a high-barrier electromagnetic shielding packaging film that combines high barrier properties with high electromagnetic shielding.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI +1
Electromagnetic shielding material with macroscopic conical hole structure and preparation method and application thereof
PendingCN122278162AHigh electromagnetic shieldingavoid easy cloggingPolymer scienceComputer printing
This invention belongs to the field of electromagnetic shielding, and relates to an electromagnetic shielding material with a macroscopic conical hole structure, its preparation method, and its application. The preparation method includes: S1. Adding graphene nanosheets and polylactic acid particles to dichloromethane to obtain a graphene composite dispersion; S2. Drying the graphene composite dispersion at room temperature in a fume hood to obtain a graphene / polylactic acid composite material; S3. Chopping the obtained graphene / polylactic acid composite material and feeding it into a benchtop extruder, extruding composite filaments for 3D printing via melt spinning; S4. Creating a 3D printing model on a computer, feeding the composite filaments into a 3D printer, and processing the material with a macroscopic conical hole array structure using computer-controlled 3D printing. This electromagnetic shielding material exhibits excellent electromagnetic shielding performance, has a simple processing technology, low equipment parameter requirements, and is suitable for industrial production.
Owner:NANTONG UNIV
Integrated miniaturized air-cooled heat dissipation electronic cabinet
This utility model relates to an integrated miniaturized air-cooled electronic chassis, including a chassis with a cubic structure open at both the front and rear ends. A front cover assembly and a rear cover assembly are respectively installed on the front and rear open surfaces, and electromagnetic shielding strips are provided in the installation gaps between the chassis and the front and rear cover assemblies. A circuit module is installed inside the chassis, and curved heat dissipation fins are installed on the top and bottom. An air inlet is provided at the rear corresponding to the heat dissipation fins. Air outlets are provided on the top and bottom of the front cover assembly. A fan assembly is installed on the rear cover assembly. This application utilizes the fan assembly, rear cover assembly, chassis, heat dissipation fins, and front cover assembly to form an effective air-cooled heat dissipation channel, which can quickly dissipate the heat generated by the circuit modules inside the chassis, greatly improving the chassis's heat dissipation efficiency. Simultaneously, the electromagnetic shielding strips effectively reduce electromagnetic interference, improve the stability of the electronic equipment inside the chassis, and ensure that the chassis can operate normally in complex electromagnetic environments.
Owner:CENT CHINA OPTOELECTRONICS TECH RES INST (CHINA STATE SHIPBUILDING CORP 717TH RES INST)
Low-voltage wire harness isolation device
ActiveCN224204700USolid isolation protectionResist magnetic field interferenceElectrical apparatusStructural engineeringHigh tension line
The utility model relates to the field of wire harnesses, and discloses a low-voltage wire harness isolation device, which comprises a cover plate, the cover plate is detachably arranged on the top surface of a U-shaped seat, a plurality of pressing plates are movably arranged below the cover plate, elastic arc-shaped plates are movably arranged below the pressing plates respectively, and the elastic arc-shaped plates are arranged on the top surface of the U-shaped seat. Springs are fixed between the multiple elastic arc-shaped plates and the multiple pressing plates correspondingly, a first conductive foam liner is fixed to the inner wall of the U-shaped base, and second conductive foam liners are fixed to the inner walls of the multiple elastic arc-shaped plates correspondingly. According to the utility model, through the cooperation of the cover plate, the U-shaped seat, the pressing plate, the elastic arc-shaped plate, the spring, the first conductive foam liner and the second conductive foam liner, the low-voltage wiring harnesses with different sizes can be stably isolated and protected, and the magnetic field interference generated by the high-voltage wiring harnesses can be effectively resisted, thereby improving the flexibility and practicability of the device.
Owner:HEFEI JISHUN NEW ENERGY TECH CO LTD
Anti-interference photoelectric PCB board with electromagnetic shielding cover
Owner:NO 15 INST OF CHINA ELECTRONICS TECH GRP +1
Lightweight shielded cable and preparation method thereof
PendingCN121964248AFacilitate the realization of lightweight designAchieve lightweight designMagnetic/electric field screeningInsulated cablesMetallic foilAdhesive cement
A lightweight shielding cable disclosed by the present invention comprises a core wire, an insulating layer, a metal foil layer, a modified shielding layer and a surface layer which are sequentially arranged from inside to outside, the modified shielding layer is glass fiber cloth impregnated with a conductive adhesive, and the conductive adhesive comprises an adhesive and conductive particles dispersed in the adhesive. The conductive particles are mutually communicated to form a conductive channel, each conductive particle comprises a composite microsphere with a core-shell structure, the core of the composite microsphere is a polymer microsphere, the shell of the composite microsphere is made of an inorganic material, and the shell is composed of nano ferroferric oxide particles and nano silver particles. The modified shielding layer made of the composite material is small in density, and lightweight design of the cable is facilitated. And the composite microspheres of which the shells consist of the nano ferroferric oxide particles and the nano silver particles are selected as the conductive particles of the modified shielding layer, so that the electromagnetic shielding performance of the cable is improved. The invention also discloses a preparation method of the lightweight shielding cable.
Owner:JIANGYIN YUANDA ELECTRICAL MATERIALS CO LTD
Polystyrene-based composite material as well as preparation method and application thereof
The invention relates to the technical field of polymer composite materials, in particular to a polystyrene-based composite material as well as a preparation method and application thereof. Mixing polystyrene, thermoplastic expanded microspheres and an inorganic salt aqueous solution to obtain a mixture; the mixed material and the Ti3C2TX MXene dispersion liquid are mixed, and flocculate is obtained; soaking the flocculate in a polyethyleneimine solution to obtain a modified material; mixing the modified material with the single-walled carbon nanotube dispersion liquid containing the anionic surfactant to obtain a premix; and carrying out foaming treatment on the premix, and cooling to obtain the polystyrene-based composite material. According to the preparation method, the defect of randomness of a pore structure caused by traditional foaming is overcome, meanwhile, the obtained polystyrene-based composite material has a porous isolation structure and a three-dimensional conductive network, the tendency of overall collapse of pores under mechanical extrusion is effectively inhibited, and the technical bottleneck of insufficient buffer performance is remarkably improved.
Owner:CHIZHOU UNIV
High speed communication cable applications for pet double sided copper foil
This invention relates to the use of a PET double-sided copper foil composite material in the fabrication of 224Gbps or 448Gbps high-speed communication cables. The PET double-sided copper foil composite material comprises a PET base film and a first copper foil layer and a second copper foil layer respectively disposed on both sides of the PET base film. This type of composite material was originally used as a conductive current collector in batteries; this invention adapts it for the field of high-speed communication cables, allowing it to serve as a covering layer, shielding layer, conductive connection layer, or grounding connection layer in 224G or 448G high-speed communication cables. A continuous shielding and grounding path is formed through overlaps, exposed copper foil connection areas, drain lines, grounding conductors, connection terminals, or shielding shells to improve electromagnetic shielding continuity, reduce crosstalk and external electromagnetic interference, and improve impedance stability, insertion loss stability, and shielding reliability after bending. This application differs from its use as a carrier of active materials for battery electrodes and as a current collector for battery charging and discharging; it addresses the issues of shielding, covering, conductive connection, and signal integrity in high-speed signal transmission environments.
Owner:HANGZHOU JULI INSULATION
Electromagnetic shielding coating spraying equipment
ActiveCN224253249UReduce labor intensityReduce the difficulty of operationHollow article cleaningSpray boothsGlass fiberMagnetic shield
The utility model discloses electromagnetic shielding coating spraying equipment, which relates to the technical field of nuclear magnetic resonance instrument manufacturing, and comprises a support, four supporting wheels are arranged on the support, a glass fiber reinforced plastic cylinder is arranged on the four supporting wheels, a supporting and positioning mechanism is arranged in the glass fiber reinforced plastic cylinder, one end of the supporting and positioning mechanism is connected with a coating supply component through a pipeline, and the other end of the supporting and positioning mechanism is connected with a coating supply component. An arrangement component for winding the pipeline is arranged on the support, and a rotary spraying module is arranged at the end, away from the pipeline, of the supporting and positioning mechanism; the rotary spraying module is supported in the middle of the glass fiber reinforced plastic cylinder through the supporting and positioning mechanism, the moving unit achieves automatic walking and moving of the rotary spraying module, the spraying efficiency is improved, operation is easy and convenient, time and labor are saved, manual cleaning and spraying are not needed, and the labor intensity of workers and the operation difficulty can be greatly reduced; and cleaning can be conducted before spraying through the arranged telescopic rod and the arranged cleaning brush, the adhesion effect of the coating is improved, and then the electromagnetic shielding performance is improved.
Owner:SHANGHAI TANGSHENG ENVIRONMENTAL PROTECTION TECH CO LTD
Connector with electromagnetic shielding
ActiveCN224204432Uachieve fixationNot prone to breakageCoupling device detailsStructural engineeringElectromagnetic shielding
The utility model provides a connector with electromagnetic shielding, which belongs to the technical field of connectors, mainly aims at solving the problems that the shell of the existing connector cannot shield electromagnetic interference and the shell is easy to damage due to buckle connection, and adopts the following technical scheme that the connector comprises a front shell, a connector body and a rear shell, one end of the front shell is provided with a rear shell, the periphery of the connector body is provided with a connecting shell, the bottom of the connecting shell is provided with a circuit board, one end of the rear shell is provided with an integrated circuit and a shielding ring, one end of the shielding ring is connected with multiple groups of connecting wires, and the front shell, the rear shell and the connecting shell are all connected with a ground wire through the circuit board. The front shell, the rear shell and the connecting shell are all made of conductive materials, the electromagnetic shielding effect of the connector is improved, the front shell and the rear shell are limited through the first boss and the second boss, abrasion to the shells is reduced, and the service life of the connector is prolonged.
Owner:SHENZHEN WEIXIANKE ELECTRONICS
Electric connector, electric connecting device and electronic equipment
PendingCN121965223AHigh electromagnetic shieldingLarge shielding area
The invention discloses an electric connector, an electric connection device and electronic equipment. The electric connector comprises an electromagnetic shielding shell and a connecting assembly. The electromagnetic shielding shell comprises a shielding frame defining an electromagnetic shielding cavity and a shielding cover fixedly connected with the shielding frame. The two shielding covers are arranged on the two opposite sides of the shielding frame in a spaced mode so as to form an avoiding notch communicated with the electromagnetic shielding cavity. The connecting assembly comprises an insulating part and a conductive terminal fixedly arranged on the insulating part, and the insulating part penetrates through the avoiding notch and is fixedly connected with the shielding cover, so that at least part of the conductive terminal is arranged in the electromagnetic shielding cavity. And the conductive terminal and the electromagnetic shielding shell are insulated. The shielding area of the electric connector is large, and the electromagnetic shielding performance of the electric connector can be effectively improved. And the reliability of the electronic equipment applying the electric connection device can be improved.
Owner:BEIJING XIAOMI MOBILE SOFTWARE CO LTD
A folding stretcher with electromagnetic shielding function
This utility model relates to the field of stretcher technology and discloses a folding stretcher with electromagnetic shielding function, including a supporting shielding mechanism and two lifting rod mechanisms. The supporting shielding mechanism includes an uppermost contact layer, and an insulating layer is fixedly connected to the lower end of the contact layer. In this utility model, the outer shielding layer of the supporting shielding mechanism is a composite of a copper-nickel alloy mesh and an inner shielding layer of ferrite absorbing material, which can reflect high-frequency electromagnetic waves and absorb low-frequency magnetic fields. Grounding and current conduction are achieved through braided copper strip wires, silver nano-conductive sleeves, grounding terminals, and magnetic blocks, effectively preventing electromagnetic interference. The contact layer, insulating layer, and supporting layer are respectively made of flame-retardant aramid fiber cloth, epoxy resin coating, and carbon fiber substrate to ensure safety and strength. The lifting rod mechanism is foldable, the supporting legs and moving wheels facilitate movement, and the fixed crossbar enhances stability, meeting the needs of transporting the wounded and sick in complex electromagnetic environments.
Owner:THE 926TH HOSPITAL OF THE CHINESE PEOPLES LIBERATION ARMY JOINT LOGISTICS SUPPORT FORCE
Electromagnetic shielding concrete and method for producing the same
ActiveCN116789402BHigh electromagnetic shieldingImprove stress resistanceSolid waste managementFiberMilitary installation
The application discloses electromagnetic shielding concrete, which is composed of the following raw materials in important parts: 55-65 parts of cement, 100 parts of gravel, 50-55 parts of sand, 12-15 parts of fly ash, 16-20 parts of water, 0.5-2.5 parts of fluorine-silicon modified straw fiber and 1.5-5.5 parts of functional additives. The concrete has excellent mechanical properties, good electromagnetic shielding and high water permeability, and can meet the long-term use requirements of special places such as computer rooms and military facilities which need electromagnetic shielding treatment.
Owner:SHAOXING SHANGJIAN SHUNXING CONCRETE CO LTD
A polyvinyl chloride electromagnetic shielding foam material and a method for preparing the same
ActiveCN121718063BWidely used valueImprove flame retardant performanceMagnetic/electric field screeningPolymer sciencePolyvinyl chloride
The present application relates to the technical field of polyvinyl chloride foam material preparation, and particularly relates to a polyvinyl chloride electromagnetic shielding foam material and a preparation method thereof, wherein polyvinyl chloride resin, diisooctyl phthalate, magnesium hydroxide, copper-plated Mxene, light calcium carbonate, a heat stabilizer, a light-proof agent and a lubricant are uniformly mixed according to a certain weight ratio, and then are mixed by using a high-temperature mixing machine, and then are subjected to mold pressing to obtain a PVC composite material forming sample; the PVC composite material forming sample is added into a barrel of a conical twin-screw extruder, is subjected to extrusion forming, is subjected to pre-stretching, and then is subjected to foaming treatment to obtain the polyvinyl chloride electromagnetic shielding foam material. After the pre-stretching process, the polyvinyl chloride electromagnetic shielding foam material is obtained, the cell morphology in the polyvinyl chloride electromagnetic shielding foam material has a certain orientation along the stretching direction, the cell size is large, the specific surface area of the cells is increased, and the electromagnetic shielding performance of the material is improved.
Owner:LUOYANG INST OF SCI & TECH +1
An environmentally friendly electromagnetic shielding fiber material and its preparation method
PendingCN122082154AHigh electromagnetic shieldingReduce TVOC content
This invention belongs to the field of fiber composite material technology, specifically relating to an environmentally friendly electromagnetic shielding fiber material and its preparation method. This invention enhances the electromagnetic shielding performance of a fiber composite material composed of PET (core layer) and COPET (sheath layer) by adding a nano-metal shielding material to the sheath layer, thereby reducing the TVOC content. The electromagnetic shielding effectiveness of the fiber composite material with the added nano-metal shielding material increases from 12dB to 58dB, and the TVOC content decreases from 5125μg / m³. 3 Reduced to 293 μg / m 3 .
Owner:SICHUAN YINITE NEW MATERIAL CO LTD
A low-power high-life radio frequency neutralizer
PendingCN122269548ASuppress bridge failuresreduce driftElectric discharge tubesPlasma techniqueIsolatorHeat management
The present application relates to the technical field of neutralizing device, and particularly relates to a low-power-consumption and long-life radio frequency neutralizer, which comprises a shell, one end of the shell is connected with a ceramic base and is provided with a discharge needle, a ceramic discharge chamber is arranged in the shell, a collector assembly is arranged in the ceramic discharge chamber, and a discharge needle isolator is arranged around the discharge needle; the collector assembly comprises an inner layer collector, a radial clearance is formed between the inner layer collector and the inner wall of the ceramic discharge chamber; the shell is provided with a double-layer staggered slit. The radial clearance is arranged, so that the ceramic wall deposition state and the collector electrical parameter change are decoupled, the bridging failure of the collector area is effectively inhibited, the metal sputtering particles are difficult to continuously deposit to the key insulation part along the straight path through the discharge needle isolator, the surface creepage path is prolonged, the risk is effectively reduced, the shell eddy current loss is reduced and the heat management capability is improved through the adoption of the slit type shielding shell and the double-layer staggered slit.
Owner:ZHONGKESING POWER TECH (WUXI) CO LTD
High-performance electromagnetic shielding printed and dyed fabric and preparation method thereof
PendingCN121976404ASolve environmental problemsImprove washing fastnessShielding materialsInksScreen printingPolymer science
The invention provides a high-performance electromagnetic shielding printed and dyed fabric and a preparation method thereof. The preparation method comprises the following steps: printing and curing MXene-based electroactive ink on a fabric substrate by adopting a screen printing process, and forming an electromagnetic shielding functional layer on the surface of the fabric substrate; wherein the MXene-based electroactive ink is prepared from an MXene nanosheet, an adhesive, a thickening agent and water. The high conductivity of the MXene nanosheets is utilized to construct a shielding network, the MXene nanosheets are fixed on the surface of the fabric substrate through the aqueous binder and the thickening agent in a silk-screen printing mode, efficient shielding is achieved, meanwhile, the inherent comfort and durability of the fabric are achieved, the shielding effect of the prepared printed and dyed fabric reaches 30 dB or above, oxidation is not likely to happen, the washing fastness is high, and the service life of the fabric is prolonged. The air permeability, the moisture permeability and the softness are excellent.
Owner:ZHEJIANG FURUN DYEING & PRINTING +1
An electromagnetic shielding protection structure for an optical module
ActiveCN120928509Bavoid safety hazardssolve the inconvenienceScreening gaskets/sealsCoupling light guidesOptical ModuleOptical communication
The application discloses an electromagnetic shielding protection structure of an optical module, and relates to the technical field of optical communication.The electromagnetic shielding protection structure comprises a supporting mechanism, an external connecting mechanism is fixedly connected to the top surface of the supporting mechanism, and a network cable interface is formed in the left side of the external connecting mechanism.The electromagnetic shielding protection structure solves the problem that the existing protection structure lacks a split protection structure for key components, and when a single module in a PCB needs to be maintained, the whole shell needs to be disassembled, which may cause damage to other components of the circuit board due to accidental touch, and the safety hazard problem is solved.Through the cooperation of the linkage structure of the limiting plug and the top rod assembly, the split protection and targeted maintenance of the single module in the PCB are realized, the whole shell does not need to be disassembled, the safety hazard problem of accidental touch and damage to other components during maintenance is effectively avoided, and the problem of inconvenient maintenance caused by the lack of a split protection structure in the prior art is solved.
Owner:武汉迅捷芯科技有限公司
Housing, cover assembly, battery and electric device
PendingCN122418162Areduce adverse effectsHigh electromagnetic shieldingElectrical batteryStructural engineering
This invention discloses a casing, a cover assembly, a battery, and an electrical device. The casing may include a casing wall and a first electromagnetic shielding layer. The casing wall encloses a cavity for accommodating the battery's electrode core. The first electromagnetic shielding layer is encapsulated within the casing wall. The first electromagnetic shielding layer improves electromagnetic shielding performance, thereby reducing the adverse effects of the interfering magnetic field generated by the electrode core on the electrical device using the battery. Similarly, the cover assembly may include a cover unit and a second electromagnetic shielding layer. The cover unit closes the opening of the battery casing, and the second electromagnetic shielding layer is encapsulated within the cover unit. The second electromagnetic shielding layer improves electromagnetic shielding performance, thereby reducing the adverse effects of the interfering magnetic field generated by the electrode core on the electrical device using the battery.
Owner:SHENZHEN HIGHPOWER TECH CO LTD
Nickel-coated graphite composite powder and preparation method thereof
The invention discloses nickel-coated graphite composite powder and a preparation method thereof, and relates to the technical field of composite materials. The preparation method comprises the following steps: taking a carbon raw material as a starting point, mixing a nitrogen source, a phosphorus source and a sulfur source, performing high-temperature treatment to obtain modified artificial graphite powder, adding the modified artificial graphite powder into a plating solution mixed with nickel salt, a reducing agent, a complexing agent and a stabilizing agent, and optimizing process parameters. The nickel-coated graphite composite powder which is complete in coating, excellent in anti-aging performance and electromagnetic shielding performance and simple and efficient in preparation process is prepared. The nickel-coated graphite composite powder can be widely applied to multiple fields of electromagnetic shielding materials, conductive fillers and the like.
Owner:WUHAN BEICHEN STAR IMPORT & EXPORT CO LTD