8results about How to "Improve impregnation efficiency" patented technology

This invention relates to an insulating oil and an oil-paper insulation system containing superhydrophobic nanoparticles, as well as their preparation method and application, belonging to the field of electrical equipment insulation technology. This invention provides an insulating oil containing superhydrophobic nanoparticles, wherein the superhydrophobic nanoparticles are silane-modified nanoparticles, and the nanoparticles include at least one of SiO2, TiO2, and h-BN; the insulating oil includes at least one of mineral insulating oil, synthetic insulating oil, and natural ester insulating oil. This invention achieves the superhydrophobicity of the nanoparticles and good compatibility with the oil phase through silane modification. Adding silane-modified nanoparticles to the insulating oil effectively reduces the water content of the insulating oil and optimizes the interfacial performance of the oil-paper. Combined with the low-temperature, high-efficiency, and uniform rapid impregnation process of this invention, the overall electrical performance and service life of the oil-paper insulation system are significantly improved.

The utility model relates to a graphite plate cleaning and dipping tool, and belongs to the technical field of bipolar plate dipping processing, the graphite plate cleaning and dipping tool comprises a dipping cage, the dipping cage is of a box type structure, and the dipping cage comprises a baffle horizontally arranged at the top, two sets of first surrounding plates and two sets of second surrounding plates vertically arranged, and a supporting plate horizontally arranged at the bottom; a plurality of partition nets for separating the graphite bipolar plates are arranged in the dipping cage, the distribution uniformity and dipping efficiency of the graphite bipolar plates during dipping in the dipping process are guaranteed through the partition nets uniformly distributed in the dipping cage, overlapping or stacking in the dipping process is avoided, meanwhile, a plurality of graphite bipolar plates can be placed through the dipping cage, and the dipping efficiency of the graphite bipolar plates is improved. And the impregnation efficiency of batch treatment of graphite bipolar plates can be improved.

The utility model belongs to the technical field of heavy metal extraction, and particularly relates to a dipping device for fast food packaging box heavy metal detection, which comprises a device body, a collection kettle is arranged in the device body, a dipping kettle is arranged at the top of the collection kettle, and the collection kettle is connected with the dipping kettle through a dipping liquid steam conveying pipe. A steeping liquid steam conveying pipe is arranged at one end of the steeping kettle, a steam conveying valve is arranged on the steeping liquid steam conveying pipe, a steam return pipe is arranged on the steeping kettle, the other end of the steam return pipe is communicated with the collecting kettle, a steam return valve is arranged on the steam return pipe, and the top of the steeping kettle is communicated with the condenser. A steam conveying pipe is arranged, heated impregnation liquid is conveyed to an impregnation kettle, a sample to be detected is placed in the impregnation kettle, the impregnation liquid makes contact with the sample to be detected, and heavy metal is impregnated into the impregnation liquid; by arranging the vibration motor, the screening barrel can be vibrated, the impregnation efficiency is improved, the steam return pipe is arranged at the bottom of the impregnation kettle, and impregnation liquid flows back into the collection kettle under the action of gravity.

The application relates to a preparation method of a graphene composite phase change thermal interface material. An oxidized graphene dispersion liquid is provided, a centrifugal roller coating and a layer-by-layer drying process are adopted to form a multilayer oxidized graphene unit layer on a substrate, and an oxidized graphene film is obtained; the oxidized graphene film is placed in a limited space, gradient heat reduction treatment is carried out, the film is controllably expanded in the out-of-plane direction, and a reduced graphene oxide film with a micro-nano cavity structure is formed; the reduced graphene oxide film is subjected to graphitization treatment, and a graphene micro-nano cavity film is obtained; through a vacuum impregnation method, a molten phase change material is filled into the micro-nano cavity structure of the graphene micro-nano cavity film. The thermal interface material has high phase change enthalpy (196.2 J / g), excellent thermal performance (in-plane thermal conductivity 65.5 W.m ‑1 ·K ‑1 , out-of-plane 21.9 W.m ‑1 ·K ‑1 , and low interface thermal resistance (0.575 K.cm 2 ·W ‑1 ).

The utility model relates to the technical field of impregnation, disclose a kind of vacuum impregnation tank, including impregnation tank and the sealing cover of cover being equipped with the sealing cover on the upper end of the impregnation tank, the vacuum pump is equipped in the outer wall one side of the impregnation tank, the discharge valve is connected and arranged in the lower end of the impregnation tank, and the placing assembly is arranged in the inner chamber of the impregnation tank. First motor and second motor start, first motor driving pin shaft slides along the adjusting groove of the adjusting plate during starting process, and adjusting plate drives connecting rod to move periodically along the outer wall of the impregnation tank front and back, so that connecting rod drives ring sleeve, disc to move periodically front and back, so that the material on the upper end of the placing frame can be moved front and back, and second motor can drive disc to rotate along the annular slide rail of the middle end of ring sleeve, so that the material placed in the placing frame rotates while moving back and forth in the inner chamber of the impregnation tank during the starting process of first motor and second motor, thereby improving the impregnation efficiency.

The application provides a gradient wave-transparent heat shield forming method, comprising the following steps: S1, preparing a preform of a heat shield; S2, configuring ceramic slurry; S3, fusing the ceramic slurry into the preform of the heat shield to form a green body of the heat shield; S4, placing the green body of the heat shield into the ceramic slurry to densify the green body of the heat shield; and S5, sealing a large port of the green body of the heat shield and performing solution infiltration on the green body of the heat shield by using polytetrafluoroethylene to form the heat shield. The heat shield prepared by the method not only has the functions of bearing and transmitting waves, but also has excellent heat insulation and heat protection functions.

The invention provides impregnating resin with low viscosity and long pot life and a preparation method thereof. Belongs to the field of impregnating resin. According to the technical key points, the adhesive comprises the following components in percentage by mass: 90-100 parts of vinyl acetate; 90 to 100 parts of a modified monomer; 1 to 1.5 parts of polyvinyl alcohol; 1.2 to 1.5 parts of dodecylphenol polyoxyethylene ether; 1.5 to 1.8 parts of sodium chloride; 0.3 to 0.4 part of ammonium persulfate; 1.3 to 1.4 parts of sodium bicarbonate; 90 to 100 parts of distilled water; 3 to 4.3 parts of styrene; silicone oil; 2 to 6 parts; and 1.1 to 1.3 parts of sodium hydroxide. The method comprises the following steps: S1, adding a mixed solution of a sodium hydroxide solution and a sodium chloride solution into a modified monomer, washing for 3-5 times, filtering and separating the monomer, and washing for 3-5 times by using distilled water; the invention aims to provide impregnating resin with low viscosity and long pot life and a preparation method thereof. The impregnating resin is used for enabling the impregnating efficiency to be higher when the whole impregnating resin is used, and meanwhile, the impregnating requirement of a high-density base material can be met.

The invention provides an impregnation preparation method and impregnation liquid for an ultrahigh-temperature ceramic phase modified C / SiC composite material, and aims to solve the problem that the existing method for treating a reinforcement body through a silane coupling agent or improving interface bonding and improving the infiltration effect by using an impregnant with a specific formula cannot be used for treating a complex component or pursuing higher compactness. The impregnation is not uniform; more internal residual pores exist; and the improvement of the impregnation efficiency is limited. According to the impregnation preparation method of the ultra-high-temperature ceramic phase modified C / SiC composite material, a composite wetting agent composed of a penetration promoting type surfactant and an interface modification type coupling agent is introduced into an impregnation resin system, so that the surface tension of the resin is remarkably reduced, and meanwhile, the interface compatibility of the resin and carbon fibers is improved; and under the synergistic effect of the subsequent vacuum-pressure impregnation process, various pores in the C / SiC composite material preform can be more quickly and deeply filled, so that the deep, quick and uniform penetration of the resin into the C / SiC composite material preform is realized.