60results about How to "Improve shielding effect" patented technology

The utility model relates to a mounting structure of PCB board large current conductor, this mounting structure includes metal base, PCB board, large current conductor and upper shell, the recessed groove for the large current conductor inlay is integrally arranged on the metal base, the PCB board sets up on the upper surface of metal base, the utility model discloses through embedding the large current conductor on the PCB board into the recessed groove inside the metal base, realizes the all -round metal surrounding and shielding of large current conductor, effectively avoids the electric field, magnetic field signal radiation to outside of the current on the large current conductor, realizes better EMC shielding effect.

This utility model discloses a wire-pair shielded data transmission cable with high transmission performance, comprising: a cross-shaped frame, the four isolation walls of the cross-shaped frame having different wall thicknesses, a buffer groove provided at the top of the isolation wall, and a folded groove aligned with the bottom of the buffer groove on the outer wall of the isolation wall, a filling rope and a set of twisted core wires arranged in the cavity between two adjacent isolation walls, aluminum-plastic composite tape wrapped around the twisted core wires, and tinned copper wire braided tape woven on the cross-shaped frame, the tinned copper wire braided tape being in direct contact with the aluminum surface of the aluminum-plastic composite tape, the tinned copper wire braided tape abutting against the twisted core wires and compressing the buffer groove, the groove wall of the buffer groove bending along the folded groove and abutting against the tinned copper wire braided tape after being compressed by the tinned copper wire braided tape, a wrapping tape wrapped around the tinned copper wire braided tape, and a sheath extruded onto the wrapping tape. This utility model has a simple structure and excellent signal shielding performance both internally and externally.

The application relates to a translational tolerance connector and a connector seat, the connector seat comprising a base with a fixed outer conductor, a floating seat composed of a floating insulator and a floating outer conductor arranged inside and outside, and an inner conductor, the floating seat as a whole is placed in the fixed outer conductor through the elastic bending part of the inner conductor, the base is provided with clamping parts for restricting the floating seat as a whole to horizontally slide along the X and Y directions from the upper and lower sides, and the floating outer conductor is provided with sliding parts in elastic abutment with the clamping parts, so that the floating outer conductor and the fixed outer conductor are in elastic abutment during the horizontal sliding of the floating seat along the X and Y directions. The application aims to provide a translational tolerance connector and a connector seat with excellent shielding effect and tolerance performance.

The application discloses a kind of magnetic field shielding method and device of mechanical pump electron beam welding, based on the simulation analysis of the magnetic field distribution at the weld of mechanical pump, according to the shape of mechanical pump, iterative design magnetic field shielding device, adopt high permeability permalloy to make " two half splicing " type double shielding structure, the splicing seam of inside and outside two shielding layers is 90 ° angle, installed in the periphery of mechanical pump, in the premise of not changing the performance of mechanical pump itself, not transforming electron beam welding equipment realizes beam current no deflection in the process of mechanical pump electron beam welding, realizes the precision welding of mechanical pump.

The utility model relates to a kind of three-phase voltage transformers of compartment, including shell and first, second single-phase mutual inductor, the top of shell is arranged three-phase, each phase includes a root of fusing tube, shell also includes three internal fusing tubes, the inner wall of the tube bottom of each internal fusing tube is arranged with spring contact finger, fuse is placed in tube, second nut is installed in tube mouth, the primary winding of first, second single-phase mutual inductor is electrically connected with first to fourth electrically conductive pole respectively, define three fusing tubes as first to third fusing tube, the other end of first electrically conductive pole is electrically connected with the spring contact finger of first fusing tube, the other end of second electrically conductive pole, third electrically conductive pole is electrically connected with the spring contact finger of second fusing tube, the other end of fourth electrically conductive pole is electrically connected with the spring contact finger of third fusing tube. Utilize a kind of three-phase voltage transformers of compartment designed by the utility model, can solve the problem of traditional three-phase voltage transformer common fusing tube, compact structure, increased operation and maintenance difficulty, reduced replacement efficiency.

This utility model discloses a metal-faced sandwich composite integrated panel for shielded rooms, relating to the fields of electromagnetic shielding and building envelope technology. This utility model includes a new integrated panel one for external building shielding and enclosure and a new integrated panel two for internal building shielding, decoration, and sound absorption. New integrated panel one consists of an enclosure layer, a sandwich layer, and a shielding layer; new integrated panel two consists of a shielding layer, a sandwich layer, and an enclosure layer. Through the unique design of new integrated panels one and two, this utility model is suitable for a wide frequency band of 10kHz-50GHz, exhibiting excellent shielding effectiveness, meeting and exceeding the national military standard GJB5792A-2021C level standard, fully meeting the design requirements of anechoic chambers and other types of shielded rooms. New integrated panels one and two are produced and constructed using innovative models and processes, achieving true integrated shielding, resulting in higher construction efficiency, better quality, stronger safety, shorter cycle time, and higher cost-effectiveness.

This utility model discloses a combined signal shielding cable, comprising a shielding paper layer, a PTFE tape layer covering the outer periphery of the shielding paper layer, a water-blocking layer covering the outer periphery of the PTFE tape layer, a tinned copper wire braided layer covering the outer periphery of the water-blocking layer, an outer insulation layer covering the outer periphery of the tinned copper wire braided layer, and a plurality of first conductor assemblies and a plurality of second conductor assemblies disposed within the shielding paper layer. The spaces between the plurality of first conductor assemblies, the plurality of second conductor assemblies, and the shielding paper layer are filled with a plurality of dispersed bulletproof wires and a plurality of fiberglass yarns. This utility model can adapt to complex and changing usage environments. By providing a multi-layered protective structure around the first and second conductor assemblies, it improves the cable's resistance to swaying, bending, corrosion, and aging, thereby extending the cable's service life.

The utility model provides a kind of multifunctional flip type mobile phone shielding box, including box and soundproofing module, box includes outer storehouse body and the flip of rotation connection in outer storehouse body, soundproofing module is composed of outer soundproofing layer and inner soundproofing layer, and inner soundproofing layer is equipped with the mobile phone accommodating cavity of accommodating, mobile phone accommodating cavity bottom is equipped with the sound interference collection recording interference module of interference sound and wireless charging module;Outer storehouse body inside is equipped with storage chamber, and soundproofing module is arranged in storage chamber, the inner wall of the chamber box is equipped with shielding component, when the flip is covered on outer storehouse body, the shielding component and soundproofing module hinder mobile phone accommodating cavity and the sound and signal transmission of outside. The utility model reduces the sound pickup effect of mobile phone to outside sound by recording interference, electromagnetic shielding and independent soundproofing module cooperation, improves the recording interference and electromagnetic shielding effect of shielding box.

This invention discloses a high-power microwave shielding composite material and its preparation method. The composite material includes a CNT composite layer and an MXene composite layer, which are stacked together. The CNT composite layer is composed of a mixture of modified MVQ and modified CNTs, with the modification of MVQ and CNTs used to achieve uniform dispersion of CNTs in MVQ. The MXene composite layer is composed of a mixture of modified MVQ and modified MXene, with the modification of MVQ and MXene used to achieve uniform dispersion of MXene in MVQ. The preparation method modifies CNTs, MVQ, and MXene to ensure good dispersion of both CNTs and MXene in MVQ, thereby preparing the stacked CNT and MXene composite layers. This results in superior HPM shielding performance, reduced overall filler loading, and decreased surface DC conductivity.

This invention relates to a metal ion crosslinking stabilizer. It primarily addresses the problems of existing gel profile control agents, such as short gelation time, easy damage to medium and low permeability layers during injection, and inability to achieve deep reservoir sealing. Its components and proportions by mass percentage are as follows: 1%-2% retarder, 3%-5% reinforcing agent, 1%-3% regulator, 4%-5% ion stabilizer, 1%-2% water purifier, and the balance being water. Preparation method: 1) Add the ion stabilizer and reinforcing agent to water according to the proportions and mix evenly in a 45°C water bath; 2) Add the regulator to the mixture and mix evenly; 3) Add the retarder and maintain the water bath for 2-3 hours; 4) Add the water purifier to obtain the target product. This metal ion crosslinking stabilizer can be used as an auxiliary additive component in the formulation of polyacrylamide ion crosslinking profile control agent systems. It can prolong the gelation time of the profile control agent, ensure the gel viscosity of the profile control agent, improve the stability of the profile control agent, and achieve effective sealing of the system.

The utility model discloses a kind of mining cables, its key points are: including power line core, control line core, center filling, wrapping layer, inner sheath, armoring layer, shielding layer and outer sheath.Power line core has 3, control line core has 3, 3 power line core and 3 control line core are stranded into cable, center filling is formed when center is placed filler strip during stranding, wrapping isolation band forms wrapping layer after stranding into cable, and wrapping cover rate is 25% to 30%.Inner sheath is extruded on wrapping layer outer by ethylene-propylene rubber.The armoring layer is inclined to be wrapped outside the inner sheath by galvanized steel wire.The shielding layer is inclined to be wrapped outside the armoring layer by tinned copper wire, and the cross section of the inclined wrapping is not less than 35mm square.The outer sheath is extruded on the shielding layer outer by chloroprene rubber material.

The application discloses a kind of flame-retardant bacteriostatic wave-absorbing PET fibers and preparation method thereof, the fiber includes fiber body and is arranged on the bacteriostatic wave-absorbing layer of fiber body surface, fiber body is skin-core composite structure, from inside to outside includes core layer and flame-retardant wave-absorbing barrier layer in sequence;Flame-retardant wave-absorbing barrier layer is the raw material of flame-retardant wave-absorbing mixture, includes the following components by weight parts:PET polyester chip 100, flame retardant 9-15, flame-retardant wave-absorbing particle 22-40, compatible agent 1.5-4.The bacteriostatic wave-absorbing layer in the application can provide excellent electromagnetic wave absorption capacity through the bacteriostatic wave-absorbing particle therein, can realize effective protection to electromagnetic pollution, and also can provide excellent antibacterial performance through active oxygen generated under light and / or electromagnetic wave irradiation.Flame-retardant wave-absorbing barrier layer can provide good reflection and absorption electromagnetic wave capacity in addition to being able to improve flame-retardant performance through the flame-retardant wave-absorbing particle therein.

The present application belongs to the technical field of radioactive source transport equipment, and discloses a radioactive source transport container, which comprises a shielding container body, a fireproof cover assembly, a carrying base and a drawer assembly. A lead shielding layer is cast in the shielding container body, and two drawer channels are arranged for the drawer assembly to slide through. The shielding container body is connected with an end cover assembly for sealing the drawer channel ports and axially locking the drawer assembly. The fireproof cover assembly is arranged outside the shielding container body and comprises a fireproof cover outer cylinder and a fireproof cover inner cylinder. Heat insulation material is arranged between the inner and outer cylinders, and a damping structure is arranged at the top. The present application doubles the loading capacity of radioactive sources through the double-drawer channels, improves the transport efficiency, and enhances the ability of the container to resist drop and fire-burning composite accidents through double-layer heat insulation and integrated damping structure. The horizontal pull-out type loading and unloading method is safe and convenient to operate. The container of the present application is suitable for B(U) type package transport of special form radioactive sources such as cobalt-60 and cesium-137.

The application relates to a semiconductor device structure and a preparation method thereof, which comprises the following steps: a substrate structure; an epitaxial structure of a first conductive type on the front surface of the substrate structure; a groove structure comprising a first groove and a second groove; a first ion implantation region of a second conductive type in the epitaxial structure and below the bottom of the first groove; a second ion implantation region of the second conductive type in the epitaxial structure and below the bottom of the second groove; an ohmic contact layer on the bottom of the first groove; and a first electrode in the first groove, in the second groove and on the exposed surface of the epitaxial structure away from the substrate structure. The semiconductor device structure of the application adopts a groove type structure, solves the problem of shallow ion implantation depth of the second conductive type in the epitaxial structure, increases the junction depth of a PN junction, improves the shielding capacity of the PN junction to the electric field of a Schottky contact surface during reverse blocking, and improves the reverse recovery speed.

The application discloses a kind of electromagnetic shielding adhesive tape based on composite electromagnetic nanoparticle layer and preparation method thereof, belong to electromagnetic shielding material this technical field, its design key points are in, from top to bottom in turn: protective layer, FeNi metal layer, composite electromagnetic nanoparticle layer, adhesive layer and release layer;The composite magnetic nanoparticle layer is the particle layer with the thickness of 10-30 μm formed by conductive polymer matrix and magnetic nano composite;The conductive polymer matrix is PPy or PANI, and the magnetic nanoparticle is Fe3O4 nanoparticle or CoFe nanoparticle.The technical scheme of the present application combines the magnetic permeability of FeNi metal layer and the characteristics of the electric loss and magnetic loss of the composite magnetic material layer (high magnetic permeability soft magnetic and conductive polymer combination), can simultaneously reflect and absorb electromagnetic waves, and the magnetic permeability guiding mechanism has excellent electromagnetic shielding efficiency in a wide frequency range, especially in low frequency and static magnetic field.

This application discloses a chassis for an on-board charger and the on-board charger itself. The chassis includes a first outer shell and a second outer shell, which together form a receiving space. The first outer shell has a top wall and an annular rim, which extends from the outer edge of the top wall toward the second outer shell to enclose at least a portion of the side wall of the second outer shell. At least one fastener is provided in a first area of ​​the side wall of the second outer shell enclosed by the annular rim. According to the embodiment of this application, the chassis of the on-board charger can provide better shielding against electromagnetic radiation, improving the electromagnetic compatibility of the chassis.

The first connector body includes a recess having a generally rectangular shape in plan view, filled with a plurality of first connection units arranged in close contact in the length direction of the first connector body, wherein each first connection unit includes a first terminal and a first shield member which surrounds the periphery of the first terminal and extends in the fitting direction, has a generally rectangular cross section.

The utility model discloses a shielding structure and a high frequency high speed signal connector, a shielding structure includes ground wire board and with ground wire terminal of ground wire board connection, the ground wire board on corresponding ground wire terminal place is provided with metal convex structure, the ground wire terminal is provided with the first recess that adapts with metal convex structure, metal convex structure is in the first recess with ground wire board and ground wire terminal connection is connected. In the utility model, through the cooperation of metal convex structure and first recess, the connection of ground wire terminal and ground wire board is realized, the contact resistance is reduced, the stability of connection is improved, the shielding effect is enhanced, and the growing high speed data transmission demand can be better satisfied.

The application relates to the field of semiconductors and discloses a cell structure of a silicon carbide MPS diode and the silicon carbide MPS diode, which comprises a silicon carbide substrate, a silicon carbide epitaxial layer located on the silicon carbide substrate, and a plurality of cells located on the silicon carbide epitaxial layer. The outer contour of the projection area of each cell on the silicon carbide epitaxial layer is a regular hexagon. The plurality of cells comprise at least two of a first cell, a second cell and a third cell. The boundary line between the Schottky junction region of the first cell and the first PN junction region is circular, and the boundary line between the Schottky junction region and the second PN junction region is a regular hexagonal deformation. The boundary line between the Schottky junction region of the second cell and the first PN junction region is a regular hexagonal deformation, and the boundary line between the Schottky junction region and the second PN junction region is circular. The boundary line between the Schottky junction region of the third cell and the first PN junction region and the second PN junction region is circular. The anti-surge capacity is improved, and the problem that the anode metal is easily melted and fails when a surge occurs is solved.

The utility model relates to a kind of medium voltage ring main unit static contact shielding cover, including two symmetrically arranged in the static contact two sides cover body and a for connecting static contact and two cover body's fixed plate, cover body includes trapezoidal flat plate part, annular side plate part, annular transition part, waist-shaped protrusion and reinforcing rib, annular transition part surrounds in trapezoidal flat plate part four around, annular side plate part is located annular transition part inboard, the two sides of annular transition part respectively through rounded corner connection trapezoidal flat plate part and annular side plate part, waist-shaped protrusion and reinforcing rib are arranged in annular side plate part inboard, fixed plate is U-shaped structure, fixed plate is set between two cover body, the two sides of fixed plate respectively through screw and the waist-shaped protrusion of two cover body's detachable connection, the middle part of fixed plate is opened for connecting static contact's mounting hole;The utility model is simple in structure, easy to install, can effectively improve the electric field in disconnecting switch, improve the overall performance and reliability of medium voltage ring main unit disconnecting switch.

The utility model discloses a kind of multi-layer metal foil shielding layer anti-electromagnetic interference touch screen, including touch screen body, metal shell is arranged outside touch screen body, the upper and lower ends between the metal shell and first shielding layer are all left gap, the inner wall of the metal shell is fixedly connected with support seat, the support seat is located first shielding layer side, first shielding layer is fixedly connected with support seat by screw, support seat about the bisecting line of metal shell is symmetrically distributed upside and downside, the outer wall of touch screen body is wrapped with third shielding layer, second shielding layer is provided on the outer wall of third shielding layer, first shielding layer is provided on the outer wall of second shielding layer, the upper and lower ends of first shielding layer, second shielding layer and third shielding layer are all in right angle hook shape, gap between metal shell and touch screen body and first shielding layer is all daubed with sealant. The device can be wrapped to touch screen body Shielding, thereby improve shielding effect, guarantee the service life of touch screen body.

The utility model discloses a kind of metal grid shielding cases of anti-static interference's LCD display screen, it is related to LCD display screen technical field, and it includes: metal cover and the metal grid being set in the inside of metal cover, the rear surface of the metal cover is provided with shielding case, and the rear surface of the metal cover is provided with electromagnetic shielding film in the front of shielding case, the outside of the metal cover is also installed with ground plate, the front surface of the metal cover and the rear surface of shielding case are coated with antistatic coating. By installing shielding case on the rear surface of metal cover to increase its thickness, which can effectively improve the shielding ability of electromagnetic interference, and using ground plate can transmit static electricity to the ground through the conductor, avoid static electricity affecting the work of LCD display screen, by setting electromagnetic shielding film between metal cover and shielding case, which effectively suppresses electromagnetic interference and static interference, thereby improving display effect and the stability of equipment.

This utility model relates to the field of connector technology, specifically to a sensor connector with a shielded structure, including a male terminal and a female terminal, which mate with each other. The male terminal has an internal reinforcing connection mechanism, which includes an extension post fixedly connected to the end of the male terminal away from the female terminal. The male terminal has a first insertion groove inside, and a reinforcing block is inserted into the extension post. A sealing gasket is fixedly connected to the outer wall of the reinforcing block and is also fixedly connected to the inside of the extension post. This utility model enhances the mechanical connection strength between the male and female terminals through the cooperation of the male terminal and the reinforcing connection mechanism, ensuring stable contact even under vibration, preventing loosening or disconnection. The sealing gasket design provides an adaptive seal, and the linkage mechanism of the compression block, connecting rod, contact head, and lifting block automatically clamps the terminal wires during insertion.

The invention relates to the technical field of wind power cables, in particular to an offshore wind power cable with a grid reinforcing layer and rated voltage of 155kv, which sequentially comprises a conductor, a semi-conductive nylon tape I, a conductor shield, an EPR insulator, an insulation shield, a semi-conductive nylon tape II, a tinned copper wire shield, a semi-conductive nylon tape III, an inner sheath and an outer sheath from inside to outside, and a grid reinforcing layer is arranged between the inner sheath and the outer sheath. According to the offshore wind power cable with the grid reinforcing layer and the rated voltage of 155kv, the grid reinforcing layer is of a customized terylene woven grid belt structure, after dipping treatment is conducted through special temperature-resistant glue, the performance is stable at the high temperature of 160-200 DEG C, the tensile strength is larger than or equal to 800N / 5cm, compared with an existing common terylene reinforcing belt, the high-temperature tensile strength is improved by 50% or above, and the rated voltage of 155kv is greatly improved. The problem that an existing reinforcing layer is poor in temperature resistance is effectively solved. Through plasma surface cleaning, gradient drying and shaping and precise glue material adaptation, the bonding strength of the grid reinforcing layer and the inner and outer sheaths is remarkably improved, and an integrated structure is formed between the layers.

This utility model relates to the field of electromagnetic shielding cable technology, and more particularly to an electromagnetic shielding cable that solves the problems of poor electromagnetic shielding effect and inconvenience in fixing cables together in the prior art. An electromagnetic shielding cable includes several conductors, each conductor covered with a plastic sleeve. A shielding layer is fitted between the conductors, and a metal mesh layer is fitted on the surface of the shielding layer. A protective layer is fitted on the surface of the metal mesh layer, and a grounding wire is provided between the shielding layer and the metal mesh layer. A limiting mechanism is provided on the surface of the protective layer. This utility model enhances the shielding effect, resulting in better electromagnetic shielding of the cable. It provides a strong and secure fixing effect on the cable, effectively clamping the cable and preventing slippage, facilitating the fixing of cables together for use.

This utility model discloses a portable electromagnetic shielding system, including a shielding body, a floor assembly, and a shielding curtain, which are detachably connected to form a shielding chamber with a curved inner surface. The shielding body and the shielding curtain are inflatable modules with identical structures. Each inflatable module consists of adjacent composite shielding layers sandwiched by an inflatable interlayer and encased in an inflatable protective sleeve. The floor assembly includes a base plate, a composite shielding layer, and a floor protective sleeve. The composite shielding layers are electrically connected to form at least two closed electromagnetic shielding cages. Adjacent electromagnetic shielding cages are grounded through capacitors. Beneficial effects: This utility model, through the design of the shielding body structure and the conductive splicing with the floor assembly to form at least two closed Faraday cages with an outer layer encasing an inner layer, and with equally spaced insulating interlayers between adjacent Faraday cages, achieves portability, anti-resonance, and enhanced shielding effects through a capacitor connecting the inner Faraday cage to the outer Faraday cage, which is grounded.

This utility model discloses a high-shield coaxial quick-pull self-locking connector, including a socket assembly and a plug assembly. The socket assembly includes a socket housing and a first coaxial assembly. One end of the socket housing has a first cylindrical portion, and the first coaxial assembly is disposed within the first cylindrical portion. A snap-fit ​​groove is circumferentially provided on the outer wall surface of the first cylindrical portion. The plug assembly includes a plug housing and a second coaxial assembly. One end of the plug housing has a second cylindrical portion corresponding to the first cylindrical portion, and the second coaxial assembly is disposed within the second cylindrical portion. A snap-fit ​​tube is also provided around the second cylindrical portion, and a snap-fit ​​strip is provided at the end of the snap-fit ​​tube. The first cylindrical portion can be inserted into the gap between the snap-fit ​​tube and the second cylindrical portion to connect the first coaxial assembly and the second coaxial assembly, and the snap-fit ​​strip abuts and is limited within the snap-fit ​​groove. The technical solution of this utility model aims to eliminate the micro-explosion noise generated when connecting and disconnecting the connector, while maintaining a safe and tight locking fit.

This utility model relates to the field of building construction materials technology and discloses a high-durability reinforced pipe pile, including a reinforced pipe pile body. The outer surface of the reinforced pipe pile body is coated with an epoxy zinc-rich primer, the outer surface of the epoxy zinc-rich primer is coated with a glass flake anti-corrosion paint, and the outer surface of the glass flake anti-corrosion paint is coated with a polyurethane topcoat. This high-durability reinforced pipe pile, by setting the epoxy zinc-rich primer, glass flake anti-corrosion paint, and polyurethane topcoat, can form a comprehensive, multi-layered protection for the reinforced pipe pile body. The zinc powder in the epoxy zinc-rich primer can provide cathodic protection for the pipe pile surface. The glass flake anti-corrosion paint, with its excellent shielding performance, effectively blocks the penetration of moisture, oxygen, and corrosive ions. The polyurethane topcoat, with its excellent weather resistance, wear resistance, and chemical corrosion resistance, protects the inner anti-corrosion coating, significantly improving the corrosion resistance of the reinforced pipe pile body and significantly extending its service life.