338results about How to "Guaranteed shielding effect" patented technology

The invention relates to a shield plate component and a contact module, and a high-speed electric connector. The contact module comprises an insulator, a grounding contact, a signal contact, and the shield plate component; the shield plate component comprises a contacting shield plate, an auxiliary shield plate; the auxiliary shield plate is in electric contact with the contacting shield plate; the contacting shield plate comprises a shield and a shield plate hole arranged on the shield; a contact sheet protruded to one side of the auxiliary shield plate is arranged at a hole edge of the shield plate hole, the contact sheet and the shield are integrally bent and molded; an avoidance channel for enabling the contact sheet to pass through is formed on the insulator, the contact sheet is in conductive contact with the grounding contact, and a contact sheet via hole for penetrating the contact to penetrate through is formed on the auxiliary shield plate, and an seal cap part for capping the shield plate hole is arranged on the auxiliary shield plate. The seal cap of the auxiliary shield plate contacts the shield plate hole on the shield plate, the capacity of resisting the signal crosstalking by the grounding contact is improved, and the problem that the existing contact module is bad in signal crosstalking resistance is solved.

The invention discloses a shielded, sealed and anti-rotation circular connector which comprises a plug and a socket. The plug comprises a plug shell assembly and a tail assembly, and the socket comprises a socket shell assembly and a tail assembly; the plug shell assembly comprises components including a shell, a connecting ring, jacks, a shielding ring, a locking backstop mechanism, toothed sleeves, insulator assemblies and the like; the socket shell assembly comprises components including a socket shell, pins, a U-shaped sealing ring, a boundary sealing pad, insulator assemblies, toothed sleeves and the like; each tail assembly comprises a connecting nut, a sleeve, a cone-point set screw, elastic parts, a shielding bushing and the like. The shielded, sealed and anti-rotation circular connector has the advantages that after the plug is connected with the socket, a cable shielding layer without skin is directly clamped by the shielding bushings of the tail assemblies of the plug and the socket, so that the connector and a cable can be circularly shielded and can be prevented from being pulled by external force; the connecting nuts are fixedly connected with the sleeves by the elastic parts, and the sleeves are driven to axially move when internal threads on the connecting nuts are matched with external threads on the plug shell / the socket shell, so that the sleeves and the shells can be sealed.

The invention discloses a method for repairing the damage of an external shield of a medium and high voltage cable, belongs to the technical field of wires and cables, and is used for cleanly processing the damaged external shield and the surface of an insulator. The method comprises the following steps of: completely wrapping a damage part by using a pressing sheet of an external semi-conductive material; tightly winding the exterior of the damage part by using a polyester belt or a polytetrafluoroethylene belt; putting the repaired damage part into a heating device which is pre-heated to a constant temperature of 118 to 122 DEG C; heating for 4 to 6 minutes under the pressure of 1.1 MPa to 1.3 MPa; and cooling, and then cutting a thicker part to make the appearance smooth. The method has the advantages that: the appearance of the repaired part is almost the same as that of the unrepaired part; the thickness of the external shield can be guaranteed; any influence of the external shield is avoided; the shielding effect of the external shield and the quality of finished cable products are guaranteed; and economical cost is low.

The invention discloses a process for a large high-alloy steel resin bonded sand mould composite coating. The large high-alloy steel resin bonded sand mould composite coating comprises three layers of coatings, wherein the primer is an alcohol based coating, the second layer is a composite aggregate waterborne coating, and the outermost layer is a waterborne coating. When in use, the three layers of coatings are coated under the control of a certain Baume degree. In the composite coating, the primer has strong adhesion to a sand mould and ensures shielding performance of the coating; the second layer is the composite aggregate waterborne coating, which not only increases the sintering property of the coating, but also reduces the production cost; the top coating is a zircon powder waterborne coating, which ensures sufficient refractoriness in contract with molten steel, achieves better levelling property and higher surface fineness than an alcohol based coating, effectively improves the surface quality of a casting and achieves high comprehensive property than a single coating. By the process of the composite coating, excellent comprehensive property is achieved, the thickness of the coating is reduced by 20%, and the size accuracy of the casting is improved greatly.

The invention discloses an electric connector, which comprises a body, an insulated piece, multiple signal terminals and multiple grounding terminals, wherein the body is provided with multiple grounding accommodating holes and multiple signal accommodating holes which pass through the body vertically, and the inner side walls of the grounding accommodating holes and the signal accommodating holes are conductive; the insulated piece and the body are formed in a separated mode, and the insulated piece is provided with multiple convex parts accommodated in the signal accommodating holes only corresponding to the signal accommodating holes; each signal terminal is provided with at least one positioning part correspondingly positioned on the convex part, and thus, the signal terminal and the signal accommodating hole are not contacted; the grounding terminals and the signal terminals have the same structure, the grounding terminals are accommodated in the grounding accommodating holes correspondingly, the inner side wall of each grounding accommodating hole is provided with a contact area contacted with the positioning part of the grounding terminal, and the height of the contact area is between the highest point and the lowest point of the convex part. Thus, the processing difficulty and the assembling difficulty of the grounding terminal and the signal terminal can be reduced, the shielding effects of the electric connector are ensured, and the anti-interference ability in the case of signal transmission is enhanced.

The invention provides an aqueous inorganic zinc rich paint, which is prepared by mixing a component A with a component B according to a weight ratio of 4:1, wherein the component A comprises 30-32% of 500-mesh spherical / flaky zinc powder, 30-32% of 800-mesh spherical / flaky zinc powder, 30-32% of 1250-mesh spherical / flaky zinc powder, 6-8% of nanometer cerium dioxide and 2-4% of 800-mesh talcum powder; and the component B comprises 38-50% of potassium silicate, 10-20% of lithium silicate, 8-10% of potassium titanate whiskers, 5-12% of aqueous self-drying organic silicon modified acrylic resin, 0.2-0.5% of defoaming agent, 0.5-1% of wetting agent and 12-20% of water. The aqueous inorganic zinc rich paint provided by the invention has the characteristics of excellent corrosion resistance, physical and mechanical properties, wet resistance, high temperature resistance and strong construction adaptability.

The invention discloses a copper wire and a method for preparing a shielding copper wire mesh. The copper wire comprises the following ingredients: no larger than 0.0025 wt% of Si, no larger than 0.0025 wt% of Mn, no larger than 0.0025 wt% of Ni, no larger than 0.01 wt% of O, no larger than 0.005 wt% of Bi, no larger than 0.008 wt% of P, no larger than 0.008 wt% of S, no larger than 0.0025 wt% of Fe, no larger than 0.003 wt% of As, and the balance consisting of Cu and other inevitable impurities. The method comprises the following steps: a) weighing the ingredients according to the weight percentage; b) conducting vacuum induction melting; c) forging a copper blank; d) processing round bars; e) conducting solid solution treatment; f) annealing; g) drawing into wires; h) conducting bending molding; i) arranging inverted V-shaped skeletons; j) welding by precise resistance spot welding; k) shaping a copper wire mesh; l) conducting surface treatment of the copper wire mesh; and m) conducting heat setting. According to the invention, high purity cathode copper with the purity of no less than 99.99% is used as a raw material of the shielding copper wire mesh, and the impurities in the copper wire material are strictly controlled to guarantee the shielding effect of the shielding copper wire mesh.

The invention relates to a fiber composite material with a microwave absorbing function and a preparation method thereof. The invention is characterized in that: continuous silica fibers (SiO2f) are introduced to serve as a mechanical property reinforcement and electromagnetic wave absorbing medium, and a matrix material is a SiO2 material or a wave absorbing agent SiO2 material. The content of the continuous SiO2f is 10 to 40 weight percent and the diameter of the continuous SiO2f is 4-15mu m. In the preparation process, polytetrafluoroethylene or organic silicon resin is used as a fiber coupling agent, and polyvinyl acetate (PVA) or polyvinyl butyral (PVB) is used as an adhesive. A composite blank is prepared by the traditional impregnation twisting method, and a hot pressed sintering method is adopted for forming and sintering. The prepared SiO2f / SiO2 composite material has the characteristic of structure and function integration; and the prepared fiber composite material has the microwave shielding attenuation loss reduced from -4dB to -35dB in a frequency band of 8-12GHz compared with a pure molten SiO2 block, keeps invariable return loss and reflection but better shielding effect and is suitable to be used as a wave absorbing material matrix.

The invention discloses a preparation method of a high-filling composite shielding material for radiation mixing fields. The preparation method comprises the following steps of: quantitatively weighing and uniformly mixing by taking hydrogen-rich thermoplastic resin as a base material, a boron-containing compound as a neutron absorber and metal lead as a gamma-ray absorber, and supplementing functional auxiliaries in a certain proportion; and performing processes such as sectional mould-pressing and sizing, sectional mould-pressing and molding, and the like under certain pressure and temperature field conditions. The preparation method is simple in preparation process and convenient to operate. The prepared high-filling composite shielding material for radiation mixing fields has a good outline state, no cracks, no shrinkage cavity and seam inside, uniform density, good material mechanical performances, and good shielding performances on neutrons and gamma-rays, is widely applied to neutron and gamma-ray ionization radiation protection and research field of places such as nuclear reactors, nuclear power plants, isotope radiation source devices, petroleum exploration well equipment, accelerators and isotope neutron sources.

The invention discloses a high-elasticity anti-twist wind energy cable with the nominal voltage of six to thirty-five kilowatts. Three power insulated wire cores and three grounding insulation wire cores form a cable core in a twisted mode, the outer side of the cable core is sequentially provided with a two-layer alkali-free glass fiber band in an overlapped wrapping mode and a thermoplastic elastic outer jacket in an extruded wrapping mode, the outermost layer of the cable is a stainless steel wire, polyamide or polyester synthetic fiber yarn woven layer; each power insulated wire core forms a conductor by twisting tin-plated non-oxygen copper wires and stainless steel wires, each conductor is wrapped with a single-layer semi-conductive cotton tape wrapping layer in an overlapped wrapping mode, and a conduct shielding layer, an ethylene-propylene-diene monomer insulated layer and an insulated shielding layer form one power insulated wire core in an extruded wrapping mode; a semi-conductive rubber shielding layer is arranged on the outer side of each grounding insulation wire core conductor in an extruded wrapping mode. The high-elasticity anti-twist wind energy cable has the advantages of being high in extension strength, high in flexibility and abrasion resistance, resistant to oil, aging and outer environment weather and the like, and is suitable for connection portions of a turbine and a tower in a high-power wind power generation device and similar occasions.

The invention provides a three-dimensional integration method for a tile TR component subarray element and aims at providing a three-dimensional integration method for a subarray element which is thinin body and light in weight and is capable of effectively improving the assembly efficiency and quality. The three-dimensional integration method is implemented through the following technical schemeof producing a tool base consistent with a radio-frequency T / R printed board in shape and a tool pressing plate, producing opposite and symmetric electroplated metallization steps on the upper and lower surfaces of the radio-frequency T / R printed board and a radiation surface printed board, making the radio-frequency T / R printed board vertically aligned at the radiation surface printed board andshielding and sealing the peripheries of work cavities of T-type MMIC chips; and burying fuzz buttons into circular holes in the radiation surface printed board and then fastening the radio-frequencyT / R printed board and the radiation surface printed board between the steps of the tool pressing plate and a TR low-frequency and wave-controlled circuit board and vertically interconnecting and fastening the radiation surface printed board and the radio-frequency T / R printed board together to achieve interconnection of radio-frequency inner and outer conductors and inner and outer conductors of an antenna board. Radio-frequency assembly of the subarray element of a chip phased-array antenna is achieved through integral integration.

The invention provides an array digital analogy integrated signal cable for an offshore oil platform underwater pre-warning system, and relates to the technical field of offshore oil platforms or underwater security and protection facility array signal cables. The array digital analogy integrated signal cable is an integrated cable with strong current analog and digital signals and weak current analog and digital signals in a mixed mode. The array digital analogy integrated signal cable comprises a center reinforcing unit, a seven-core cable unit, a five-core cable unit, a main woven shielding layer, a coaxial-cable unit, an inner protection layer, an armor layer and an outer protection layer. The center reinforcing unit or the coaxial-cable unit is internally provided with optical fibers for transmitting optical signals. The seven-core cable unit is arranged outside the center reinforcing unit, the five-core cable unit and the coaxial-cable unit are arranged outside the seven-core cable unit, the main woven shielding layer is arranged outside the five-core cable unit and the coaxial-cable unit, the inner protection layer is arranged outside the main woven shielding layer, the armor layer is arranged outside the inner protection layer, and the outer protection layer is arranged outside the armor layer.

The invention provides a shielding device and a manufacturing method thereof. The shielding device comprises a cover and a frame, wherein the cover is provided with a top which is provided with at least one projected joint part projecting towards the frame; the frame is provided with a top and a side edge which downwards extends from the top, the top is provided with at least one joint interface corresponding to the projected joint parts of the cover, and the peripheral outline of each joint interface is the same as the peripheral outline of the corresponding projected joint part; and the projected joint part of the cover is jointed with the corresponding joint interface of the frame in an interference extrusion way to form an assembling structure of the cover and the frame. With the shielding device and the manufacturing method thereof, no side edge of the cover needs to be manufactured, thus the side edge space of the shielding device is prevented from being occupied, the cost of materials for manufacturing the side edge of the cover is saved, and zero fit-up gap is realized between the cover and the frame so that the grounding property and the shielding property of the shielding device are ensured.

The invention provides a digital symmetrical cable and a manufacturing technology thereof. The digital symmetrical cable comprises pair-twisted groups, pair twisting shielding layers, an inner shielding layer, an insulating layer, an outer shielding layer and an outer protecting layer which are sequentially arranged from the center to the outside, wherein each pair-twisted group comprises insulating layers and two copper cores, each insulating layer is wrapped outside each copper core, and the two copper cores are pair-twisted to form the pair-twisted group; the pair twisting shielding layers are aluminium foil shielding layers; the inner shielding layer is an aluminium foil shielding layer; the insulating layer is made from extruded crosslinked polyethylene; and the outer shielding layer is a copper wire braided shielding layer. As the pair-twisted groups are respectively shielded, radio-frequency interference is lowered, and accordingly, expensive electronic equipment is not needed for reducing crosstalk. The wire pair shielding and total shielding are adopted to ensure that the cable supports high transmission rate, the integral bandwidth higher than 600MHz is provided, and the highest bandwidth can reach 1.2GHz. The digital symmetrical cable can support various applications including data, multimedia, wideband videos and CATV (Community Antenna Television) on one channel and has extremely high security.

The invention provides a packaging structure of a radio frequency filtration module. The packaging structure is simple and excellent in packaging shielding effect and heat dissipating effect. The packaging structure comprises a substrate and chips arranged on the front face of the substrate, and further comprises a metal shielding cover. The four edges of the metal shielding cover vertically extend downwards respectively so that side walls and a packaging cavity can be formed. The substrate is covered with the metal shielding cover, the chips can be packaged in the packaging cavity, the chips are coated with heat-conducting glue, and the chips are connected with the metal shielding cover through the heat-conducting glue. The periphery of the substrate is provided with grounding through holes corresponding to the side walls of the metal shielding cover, the grounding through holes are filled with metal, the upper ends and the lower ends of the grounding through holes are printed with bonding pads respectively, the side walls of the metal shielding cover are welded to the bonding pads at the upper ends of the grounding through holes through tin cream, and the bonding pads at the lower ends of the grounding through holes are grounded. The invention further provides a packaging technology of the packaging structure.

The invention discloses an electric connector. The electric connector comprises an insulation main body, a plurality of grounding terminals and signal terminals which are identical in structures and correspondingly received in the insulation main body and a shielding member; each of the grounding terminals and the signal terminals has a base part, an elastic arm which is formed by bending upwardly and extended from the base part and at least one material connection part which is extended upwardly from the base part; the elastic arm is used for conductively connecting to a chip module; the material connection part is used for connecting to the material belt; the shielding member is arranged on the insulation main body; the shielding member has a plurality of holes, through which the grounding terminals and the signal terminals pass; at least one abutting part is arranged on the shielding member which corresponds to the material connection part of the grounding terminal and is projected from the hole in order to contact the material connection part of the grounding terminal. Because the abutting part is arranged on the shielding member in a protruding manner but not on the grounding terminal, structures of the grounding terminals and the signal terminals are guaranteed to be identical; the processing difficulty and assembling difficulty of the grounding terminals and the signal terminals are reduced, a shielding effect of an electric connector can be guaranteed and an interference resistance capability during signal transmission is enhanced.

The invention discloses a connector plug and a manufacturing and assembling method of the connector plug. The connector plug comprises a shielding shell, an insulated base, a terminal module and two baffles. The insulated base comprises a base body and a tongue plate connected to the front end of the base body. An insertion groove is formed in the front end face of the tongue plate in a backwards-concave mode and is throughout the rear end of the base body. The terminal module comprises an upper terminal module, a lower terminal module and a hook plate clamped between the upper terminal module and the lower terminal module. Positioning holes are formed correspondingly in an upper terminal port, a lower terminal port and a partitioning plate and communicated with one another. The upper terminal module, the lower terminal module and the hook plate form the integrated terminal module structure through the positioning holes in a secondary embedding mode, the terminal module is embedded into the insertion groove in the insulated base, the two baffles are arranged on the upper surface and the lower surface of the tongue plate respectively, the tongue plate and the two baffles are wrapped in the shielding shell, and the two baffles are connected with the shielding shell. In this way, the connector plug is easy to form and manufacture, fast, convenient and stable to assemble and good in shielding effect, improves the contact performance of a terminal and ensures stable signal transmission.

The invention discloses a conductive membrane used for electromagnetic shielding layer. The conductive membrane includes upper and lower surface layers and an intermediate layer. Both the upper and lower surface layers are made of surface decorative paper, and the intermediate layer is made of adhesive and dispersed in the adhesive Composed of shielding materials, the middle layer bonds the upper and lower surface layers together while curing and shaping, thus forming a sheet-like flexible whole. The invention also discloses a method for manufacturing the above-mentioned conductive diaphragm, which includes the following steps: 1) setting a release layer on the substrate; 2) laying the paper on the release layer; 3) coating the mixed resin on the paper ; 4) spreading shielding material on the paper; 5) covering the shielding material again with paper coated with resin; 6) hot pressing and setting; 7) finally, releasing the film after cooling. Because the conductive diaphragm is a flexible structure, it can be rolled into a roll when not in use. Therefore, it has the advantage of being convenient to use under the premise of ensuring the shielding effect.

The invention discloses a magnetic shielding structural part of a magnetic modulation voltage transducer. The magnetic shielding structural part comprises a base, a cover housing, an upper shielding plate, a shielding sleeve and a lower shielding plate. The base comprises a base plate, wherein a cylinder with an open upper end is fixed on the base plate, the lower shielding plate is fixed at the bottom in the cylinder, the upper shielding plate is fixed at the upper portion in the cylinder, and the lower shielding plate, the cylinder and the upper shielding plate define an internal cavity. The shielding sleeve is fixed outside the cylinder in a sleeved. The upper shielding plate, the lower shielding plate and the shielding sleeve are made from silicon steel. The cover housing is fixed with the base, the cover housing covers the cylinder and the shielding sleeve, and the top face of the cover housing is provided with a wire penetrating hole communicated with the internal cavity. The magnetic shielding structural part is provided with a shielding space defined by the upper shielding plate, the lower shielding plate and the shielding sleeve, prevents an external magnetic field from interfering magnetic circuit parts in the shielding space and is good in shielding effect, compact in shielding structure and low in manufacturing cost.

Disclosed is an angular high-voltage plug (1) for use in the electrical system of motor vehicles, comprising an outer conductor (3.1, 3.2) and an inner conductor (5.1, 5.2) which are disposed in an electrically insulating, monolithic housing. The outer conductor (3.1, 3.2) consists of a first outer conductor part (3.1) at the cable end and a second outer conductor part (3.2) at the plug-in end. The first outer conductor part (3.1) and the second outer conductor part (3.2) are interconnected using an interference fit.

The invention provides an electronic circuit module and a manufacturing method thereof. The electronic circuit module comprises an element built-in substrate, surface-mounted elements, a packaging part and a shielding part. The element built-in substrate includes a metal base layer, an insulating outer installation part which is made of synthetic resin, and first projections. The base layer has corners and side surfaces, and is also used as a grounding line. The outer installation part covers the corners and the side surfaces, and has a first surface. The first projection has a first end face exposed by the external installation part, and a second surface adjacent to the first surface, and is projected outwardly at a position of the corner far away from the side surface. The surface-mounted elements are mounted on the element built-in substrate. The packaging part covers the surface-mounted elements. The shielding part is made of conductive synthetic resin, and covers the packaging part, and has a third surface attached to the first surface and the second surface.

The invention relates to a sensor for measuring water content of oil water. The sensor comprises a double-layer nested housing and a pair of wide-band antenna; wherein the double-layer nested housing comprises an external layer shielding housing and an internal layer isolation housing which is coaxially nested in the external layer shielding housing, an interval is arranged between the external layer shielding housing and the internal layer isolation housing and is filled with a water-absorption substance, the wide-band antenna can be symmetrically arranged between the external layer shielding housing and the internal layer isolation housing, and the radiation direction of the wide-band antenna is perpendicular to the antenna. The pollution on the sensor by crude oil is little, compared with a ray method for measuring the water content of a medium, the sensor has the advantages of high security, economical and practical performances, and low cost, compared with a ultrasonic method, the pressure influence on signal transmission is little.

The invention relates to an electromagnetic shielding package body which includes: a substrate; at least two chips which are disposed on the substrate; a shielding body which is made of a shielding gel and covers the chips and separate the chips from one another so as to provide electromagnetic shielding between the chips and the environment and among the chips, wherein the shielding body is grounded through a conductor; and an insulating layer which is made of an insulating gel, wherein the insulating layer is coated to a conductive structure of the chips, in supposedly electrical insulation from the shielding body, and / or is coated to a conductive structure of the substrate, in supposedly electrical insulation from the shielding body, such that the conductive structure and the shielding body are electrically insulated. The invention also relates to a method for manufacturing such electromagnetic shielding package body.

The invention discloses a shielding cabinet which comprises a cabinet body and a shielding door, the shielding door is rotatably connected with the cabinet body through a door shaft, three vertical faces of the cabinet body are cabinet body metal plates formed by bending a complete steel plate, the top of each cabinet body metal plate is fixedly connected with a top plate metal plate, and the bottom of each cabinet body metal plate is fixedly connected with a bottom plate metal plate. Welding a stainless steel shielding edge metal plate on an opening edge formed by the cabinet body metal plate, the top plate metal plate and the bottom plate metal plate; the shielding door comprises a shielding door outer door plate and a stainless steel inner door plate which are sequentially installed from outside to inside, and the stainless steel inner door plate is matched with the stainless steel shielding edge metal plate in shape. Shielding can be achieved through combination of the stainless steel inner door plate and the stainless steel shielding edge metal plate between the cabinet body and the shielding door, a stainless steel plate does not need to be adopted for manufacturing the cabinet body, and a large amount of raw material cost is saved; the shielding door is divided into the shielding door outer door plate and the stainless steel inner door plate, the shielding door outer door plate is independently processed and sprayed with anti-rust paint, and the welding difficulty and sealing requirements of the shielding door outer door plate are reduced.

The invention relates to a pipe busbar supporting two-way fitting and a shielding ring and a shielding spherical crown thereof, and aims to solve the problem of high probability of electric leakage in a connecting place between a grading ring and a supporting frame in prior art. The upper and lower shielding fittings of the pipe busbar supporting two-way fitting comprise connecting plate connecting structures which are used for connecting corresponding connecting plates, and also comprise sealing covers which are electrically connected with corresponding shielding fitting bodies, and can shield the connecting plates connected on the connecting plate connecting structures in the up-down direction. The connecting place between the shielding fittings and the supporting frame is fully shielded without causing accumulation of a large amount of electric energy; namely, the pipe busbar supporting two-way fitting provided by the invention is not subjected to an electric discharge phenomenon easily; and by virtue of the way of drilling holes in the lower sealing cover and fully plugging the upper sealing cover, the installation difficulty of the shielding fittings is lowered to the greatest extent while the shielding effect of the shielding fittings is ensured.

The invention discloses a phased array radar TR component power supply. The invention aims to provide the TR component power supply which is high in reliability, high in integration level, convenientto install, maintain as well as upgrade and expand; according to the technical scheme, power supply modules (8) with arch-shaped handles at the front ends are arranged in module channels of a power supply machine box bottom plate (4) side by side in a ranks mode through rectangular windows arranged in a linear array configuration mode through a power supply machine box front panel (1), the tail ends with connectors are inserted into module blind-plug connectors (13), the module blind-plug connectors (13) are connected to power input and output connectors (12) fixed on power supply machine boxrear panels (5) through connecting back plates (7), and are used for outputting a direct-current power supply; one end of a main control panel (9) is connected with a man-machine interaction panel (10) through a high-speed arranging cable, and the other end of the main control panel (9) is connected with the power supply modules (8) inserted in the module blind-plug connectors (13) through the connecting back plates (7), and reliable and stable conversion from one path of high-voltage alternating-current power supply to multi-path low-voltage direct-current power supply is completed.

The invention discloses a rated-voltage 6-35kV high-elasticity distortion-resistant wind power cable. The rated-voltage 6-35kV high-elasticity distortion-resistant wind power cable is characterized in that a cable core is formed by stranding three power insulation cores and three grounding insulation cores, a dual-layer alkali-free glass-fiber strip and a thermoplastic elastomer are sequentially arranged outside the cable core respectively in a wrapping manner and in an extruding manner, and an outermost layer of the cable is a braid layer consisting of stainless steel wires and polyester synthetic fiber yarns; each power insulation core adopts a tinned oxygen-free copper wire and a stainless steel wire to form a conductor in a stranding manner, a single layer of semiconductor cotton-cloth strip is wrapped outside the conductor, and a conductor shielding layer, an EPDM rubber insulation layer and an insulation shielding layer are co-extruded to form the power insulation core; a conductor of each grounding insulation core is provided with a semiconductor rubber shielding layer in an extruding manner. The cable has characteristic of high tensile strength, high flexibility, high wearability, oil resistance, aging resistance, external environmental weather resistance and the like and is applicable to the junction between a turbine motor and a tower barrel in a high-power wind power generating device or other similar fields.

The invention discloses a grounding structure of a shielding support of a mobile terminal and the mobile terminal. The mobile terminal comprises a PCB, the PCB comprises conducting layers arranged in a laminated manner, the conducting layers include at least one grounding layer, the surface of the PCB is provided with a support pad which is connected with the shielding support, the grounding structure comprises through holes and conductive pieces, the through holes penetrate a part between the support pad and any grounding layer at least, the conductive pieces are arranged in the through holes and used to connect the support pad with the grounding layer, and the conductive pieces are disconnected with the conductive layers, except the grounding layer, of the PCB. According to the grounding structure of the shielding support of the mobile terminal, it can be ensured that the shielding support is grounded effectively, the shielding effect of a product is improved, an adhesive force between the support pad and the PCB can be strengthened, and the support pad is prevented from being peeled effectively.

The invention belongs to the field of space strong electromagnetic field protection, and particularly relates to a broadband high-power microwave adaptive protection device. In order to solve the problems that an existing protection device is low in working frequency band and narrow in bandwidth, the device comprises a switch type metasurface, two layers of band-pass frequency selection surfaces and three layers of dielectric plates. The switch type metasurface is printed on the upper surface of the upper-layer dielectric plate; the two layers of band-pass frequency selection surfaces are printed on the upper surfaces of the middle-layer dielectric plate and the lower-layer dielectric plate, and the two layers of band-pass frequency selection surfaces are the same in structure. An air layer is arranged among the three layers of dielectric plates; each unit of the switch type metasurface is composed of two square metal rings, and the metal ring on the outer side is connected with the adjacent unit to form a grid structure. Four gaps are etched at the midpoints of four edges of the inner-layer square ring, and PIN diodes are bridged on the four gaps; each unit structure of the band-pass frequency selection surface is formed by etching four rhombic gaps on a metal sheet.