5results about How to "Shielding" patented technology

The utility model provides a GIS device and an electric power system, the GIS device comprises a conductor and a voltage-sharing cover, one end of the conductor is connected with a bushing of a transformer; the voltage-sharing cover is detachably connected with one end of the conductor, the voltage-sharing cover is arranged on the outer side of the conductor in a covering mode in the circumferential direction of the conductor, and the voltage-sharing cover is used for shielding discharge of the conductor. The voltage-sharing cover is additionally arranged at one end, connected with the bushing of the transformer, of the conductor of the GIS equipment, the voltage-sharing cover is detachably connected with the conductor, and the voltage-sharing cover has insulation and voltage-sharing shielding effects, so that when the conductor discharges to the outer wall of the gas chamber of the GIS equipment, the voltage-sharing cover is arranged on the outer wall of the gas chamber of the GIS equipment; the voltage-sharing cover can play a voltage-sharing and shielding role on high-voltage field intensity, so that the problem that the conductor discharges to the outer wall of the gas chamber when the GIS equipment and the transformer operate and the high-voltage side GIS gas chamber is subjected to transient high-voltage impact is solved, and normal operation of the GIS equipment and the transformer is ensured.

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.

The utility model discloses a sealed shielding door integrating electromagnetic shielding and ray protection, which comprises a guide rail bracket, and the guide rail bracket is arranged in a door opening on a wall body; the sealing shielding door comprises a door frame, the door frame is in sliding sealing connection with the inner wall of the guide rail frame, a sliding door body is fixedly installed on the inner wall of the door frame, a ray protection layer and an electromagnetic shielding layer are fixedly connected to the outer wall of the sliding door body, and a sinking groove is formed in the periphery of the outer side of the door frame; a metal shielding strip and a sealing strip are fixedly installed in the sinking groove, the sealing shielding door relates to the technical field of sealing shielding doors, the guide rail frame is arranged to be used in cooperation with the sealing shielding door, and therefore the sealing effect between the door frame and the guide rail frame can be conveniently kept when a door opening is closed; the metal shielding strip and the sealing strip are arranged on the outer side of the sealing shielding door to be used in cooperation, and after the door frame is connected with the clamping groove in the guide rail frame in an inserted mode, electromagnetic signal shielding and gas shielding can be achieved.

The utility model relates to a modularized film-coated cover plate with electromagnetic shielding and a display module, the film-coated cover plate comprises a first film-coated layer, a glass cover plate, a thermochromic ink layer, a second film-coated layer, a first plastic block and a second plastic block which are arranged in sequence, the first plastic block and the second plastic block are arranged on the same side of the second coating layer in parallel; the first plastic block is arranged at one end of the second coating layer; the second plastic block is arranged at the other end of the second coating layer, a plastic groove is formed in the second plastic block, the size of the plastic groove is matched with that of the first plastic block, and the plastic groove is used for placing the first plastic block adjacent to the coating cover plate; according to the utility model, different material layers are plated on the glass cover plate, so that not only can the wear resistance of the glass cover plate be obviously enhanced, but also the front surface of the glass cover plate has heat dissipation and electromagnetic shielding properties, and the modularized assembly of the film-plated cover plate can be realized, thereby solving the defects in the prior art.

The application discloses a kind of ZIF-8 nanoparticle loaded cellulose barrier membrane and preparation method thereof, comprising the following steps: (1) TOCNF suspension gel is diluted into TOCNF suspension by deionized water, to obtain nanocellulose suspension solution A;(2) zinc nitrate hexahydrate is added in solution A to obtain solution B;(3) polyvinylpyrrolidone is added in solution B to obtain solution C;(4) 2-methylimidazole is added in solution C to obtain solution D;(5) solution D is placed in mold by vacuum filtration device to form a wet film, the wet film is removed, and the wet film is clamped between two pieces of acrylic plate, dried in vacuum drying oven, to obtain ZIF-8 nanoparticle loaded cellulose barrier membrane.The application selects TOCNF as the template for ZIF-8 growth, TOCNF as the template for ZIF-8 in-situ growth, which can effectively prevent them from forming aggregates, and load ZIF-8 nanoparticles through in-situ + non-in-situ method to improve the hydrophobicity, thermal stability and ultraviolet shielding property of TOCNF membrane.