1061results about How to "Reliable workmanship" patented technology

The invention discloses a pre-buried construction method for high-precision foundation bolts. The method includes the following steps that (a), construction preparation is performed; (b), a control net is established; (c), a positioning clamp and a positioning control plate are manufactured; (d), foundation steel bars are buried in advance; (e), the positioning clamp is installed; (f), the foundation bolts are installed; (g), the foundation bolts are reinforced and protected; (h), concrete pouring is performed; (i), the clamp is dismantled; (j) acceptance inspection and handover are performed to finish the pre-buried construction. The manufactured high-precision positioning clamp is adopted for performing clustering control over the pre-buried foundation bolts of each set of equipment foundations, elastic clamping tools are arranged on the outer sides of the foundation bolts, supporting legs of the elastic clamping tools are embedded into clamping holes in the positioning clamp, and the elastic clamping tools are clamped on the positioning clamp of the foundation bolts, so that the foundation bolts are further reinforced and prevented from loosening. The pre-buried construction method has the effects of being reliable in technology, high in construction precision, easy to understand and master and convenient to operate, and meanwhile is short in construction period and low in cost.

The bottom layer of invention uses aluminium baseboard; the intermediate layer is a heat conduction insulation layer; the surface layer is an electric conduction layer. It features the following: the heat insulation layer is a ceramic-like thin film layer with 10-400 micron thick and >=100Momega insulation resistance, which chemical composition is aluminium oxide. The preparation method comprises: making pretreatment, de-oiling and washing for the surface of the aluminium baseboard using mechanical method or chemical method to form a clean workpiece plane; using the microarc oxide treatment and the microplasma surface ceramic method to make a heat conduction insulation layer on the workpiece surface; finally, overlapping an electric conduction layer on the heat conduction insulation layer; etching circuit pattern.

The invention discloses a high-speed continuous photocuring type 3D printing device and a working method thereof. The 3D printing device comprises a machine case body which is divided into an upper cavity and a lower cavity by a middle partition board, wherein an image forming module is arranged in the lower cavity, a window box and an oxygen supply cooling module are arranged in the upper cavity and are combined to be fixedly mounted on the middle partition board, the oxygen supply cooling module is arranged right below the window box, and the image forming module I is arranged right below the window box; a printing platform is arranged right above the window box and is mounted on a Z-direction worktable; and the window box is connected with a raw material feeding unit. The 3D printing device is integrated with the advantages of a compound oxygen-rich film, oxygen supply cooling and liquid surface auxiliary pressurization of the window box, so that the low-cost and efficient continuous printing of large-sized products with arbitrary shapes is realized, the range of applicable materials is wide, the printed products are high in precision and quality and good in uniformity, and the process is stable and reliable. An industrial-grade solution is provided for the high-speed continuous photocuring type 3D printing.

The invention provides a method for preparing a ceramic particle reinforced steel-based mesh material, which comprises: forming a mixture of hard ceramic particles and alloy powder into strip blocks by powder sintering or by using and adhesive; joining the strip blocks into a corresponding mesh structure or joining and overlapping the strip blocks into mesh three-dimensional framework structure; and performing normal sand casting or lost foam casting, namely melting a substrate metal material, pouring the molten substrate metal material in a molding cavity, allowing the molten substrate metal material to cool and condense at room temperature, removing sand and obtaining the ceramic particle reinforced steel-based mesh material. The obtained ceramic particle reinforced steel-based mesh material gives full play to the high wear resistance of the ceramic particle hard phase and the toughness of the steel base; and the method with convenience for regulation and reliable process solves the problem of incomplete reaction of the composite material, nonuniform reinforcing phase particle distribution, pollution weakening on a reinforcing phase interface and the like and is used in wear resistance fields of mines, power, metallurgy, coal, building materials and the like.

The invention discloses an aged effluent oil treatment technology used for oil fields and oil refineries, which comprises the following steps of: tempering the effluent oil: adding hot water, an emulsion breaker and a cleaning agent in a modulating pot, stirring and heating, standing in the pot, and lifting and pumping from the bottom part to a solid-liquid separation sledge material filter; performing solid-liquid separation: heating the filtered oil water mixture and small particle solid impurities by using a material heater, entering the inlet of a horizontal spiral centrifuge, meanwhile, successively adding a flocculent according to flow, discharging aged oil solid impurity wastes from the solid outlet of the horizontal spiral centrifuge, collecting the separated out solid oil water mixture by a buffer pot, and lifting and pumping to an oil-water separation sledge material inlet by an oil water lifting pump; and performing oil-water separation: finally heating the oil water mixture in an oil water separating pot, standing, settling, entering the separated out crude oil in an oil chamber, and automatically pumping to a crude oil external transportation process by a purified oil lifting pump. By adoption of the treatment technology, the technical problem of difficulty in treating various aged effluent oils which are generated in production process of oil fields and are difficult to treat is likely to be solved.

The invention relates to the technical field of synthetic leather materials, in particular to an aqueous polyurethane emulsion for synthetic leather and a preparation method thereof. Environment-friendly aqueous polyurethane resins with different adaptabilities are manufactured by selecting materials with different functions, such as isocyanate, polyester polyol, a modified nano-silicon dioxide and the like by a high-molecular alloy technology. The aqueous polyurethane resin has the advantages of adequate raw material sources, reliable process and high solid content up to 30-40%, no organic solvent in a product, environmental protection and wide application range. The synthetic leather prepared by the aqueous polyurethane emulsion has the advantages of excellent abrasive resistance, high tear strength, high extensibility up to 400-700% and high tensile strength up to 20-45MPa and can replace PVC artificial leather, PU leather and natural leather; the synthetic material has the advantages of good hand feeling, comfort and good recoverability, as well as good water resistance, good abrasive resistance, good acid resistance, good alkali resistance, high temperature resistance and the like; and compared with the traditional synthetic leather, various technical performances of the synthetic material are obviously improved.

The invention discloses soybean polypeptide without hydrolysis and bitter tastes as well as a preparation method and application thereof. The preparation method provided by the invention comprises the following steps of: firstly producing a great deal of proteases by utilizing a solid microbial fermentation method, and removing the bitter taste and the hydrolysis taste in the polypeptide by utilizing the proteases produced by the microbial fermentation so that the favorable flavor of the soybean polypeptide is ensured, and decomposing a part of soybean protein into small-molecular polypeptide; and then preparing the soybean protein into a solution, converting a solid fermentation system into a liquid enzymolysis system, inhibiting the growth of microbes by improving the temperature of the enzymolysis system, adding high-efficiency protease, and hydrolyzing the polypeptide into the soybean polypeptide with less molecular weight by utilizing high efficiency, stability and specificity of an enzymolysis method. According to the invention, the hydrolysis degree of the soybean protein is 20-40 percent, and the prepared soybean polypeptide has the average length of 2.5-4.0 amino acid, the average molecular weight below 1,000Da and not bitter and hydrolysis tastes. The soybean polypeptide can be directly added into foods and also applied to cosmetics.

The invention discloses a coal mine underground coal seam long drill hole staged fracturing permeability increase and gas extraction method. The coal mine underground coal seam long drill hole stagedfracturing permeability increase and gas extraction method comprises the steps that a long drill hole with the length more than 100m are drilled into a coal seam using a underground tunnel drilling machine for a coal mine or a kilometer drilling machine; a rigid casing with an one-way valve is lowered into to protect the hole directly using the underground tunnel drilling machine or the kilometerdrilling machine, and casing centralizers are installed at regular intervals; after the casing is lowered, preset volumetric cement paste is injected into an annular space between the outer wall of the casing and a drill hole wall to carry out blocking and sealing; a rigid fracturing pipe with two or multiple packers is lowered into the casing to carry out coal seam staged fracturing step by stepor multistage staged fracturing; and the fracturing pipe and the packers are removed after staged fracturing permeability increase, the casing of coal seam long drill hole opening is accessed with a gas extraction pipeline after drainage finishes to carry out efficient extraction of gas. The engineering amount of a tunnel and hole-drilling can be greatly reduced, the coal seam gas extraction efficiency is improved, and the coal mine underground gas treatment cost is reduced.

The invention discloses a method for extracting silver from silver separated residue, which relates to a method for recycling silver from the solid residue of copper anode sludge after the metal such as Se, Cu, Te, Au, and Ag is separated and extracted. The invention is characterized in that the invention comprises the steps that firstly, the silver separated residue is pulped, industrial H2SO4 is adopted to adjust the acidity of the solution, the oxidizing agent NaClO3 is added to control oxidation reduction potential of the solution to perform oxidizing pretreatment, Ag2O, Ag2SO4, Ag2S, and simple substance Ag in the silver separated residue which can be hardly leached are changed into AgCl which can be easily leached by Na2SO3, and the AgCl is reduced into coarse Ag powder through CH2O under the alkalinity condition. The method of the invention has the advantages that the equipment is simple, the process flow is simple, the silver recovery ratio is high, the loss of the noble metal such as Pt and Pd, etc. in the silver separated residue can not be caused, and the invention is suitable for large-scale industrial production.

The invention discloses a preparation method of a particle-reinforced metal matrix composite material, and belongs to the technical field of a novel material. The method comprises the following steps: firstly, putting reinforced particles and matrix powder into a ball grinder, so as to evenly mix; then putting the mixed powder into a graphite jig, putting into spark plasma sintering (SPS) equipment; setting a proper sintering parameter, and putting the sintered sample into a vacuum tube furnace to set heating temperature, so as to change a bonding interface between the reinforced particles and the matrix in the composite material, or prompt interface reaction. The reinforced particles in the composite material prepared by the method can be well evenly distributed inside a composite layer, so that the comprehensive properties of the materials are greatly improved, the composite material is even and single in texture, the mechanical property can be changed to a certain extent, and reference is provided for high-temperature wear-resisting fields, such as steel, metallurgy, coal and the like, parts under chilled and heated conditions or other researchers for researching the composite material performances.

The invention belongs to the technical field of seawater desalting and water treatment and relates to a washing method for preventing a reverse osmosis membrane or a nano-filtration membrane from being polluted. The washing method comprises the following steps of: firstly carrying out gas-water two-phase flow washing or simultaneous chemical washing; then extracting reverse osmosis concentrated water to wash the surface of the reverse osmosis membrane; discharging the reverse osmosis concentrated water through a concentrated water discharging valve; then, conveying pretreated water to a reverse osmosis module and displacing and discharging washing concentrated water on a reverse osmosis concentrated water side until the conductivity is recovered to 98% of the conductivity of the pretreated water; finally, closing a washing water discharging valve and opening the concentrated water discharging valve to recover normal operation of the reverse osmosis module; and sequentially washing other sets of reverse osmosis modules. The washing method disclosed by the invention is reliable in process, simple and convenient to operate, lower in energy consumption, good in economic benefits and social benefits, and environment-friendly.

The invention discloses a dust coal grading clean multigang utilizing technique with decomposition as the first grade, which comprises the following steps: processing and sorting raw coal through raw coal processing machine; getting the raw coal with a finite grain size; entering into fluidized-bed drying pyrogenic installation; proceeding dry pyrogenic reaction; getting high carbon half pulverized coke; entering into multiple circulating fluidized bed gasifying installation; proceeding multiple circulating gasifying reaction; getting synthesis gas; leading into chemical industry production; entering solid phase ash coke with low carbon content into circulating fluidized bed boiler; flaming completely. This invention possesses stable craft and low cost, which can utilize all of heat energy in craft course.

A process for preparing amino phenylmether from nitro phenylmether mixture by catalytic hydrogenating includes such steps as catalytic hydroreducing reaction between methanol, nitro phenylmether mixture and catalyst, recovering catalyst, decoloring, removing impurities, filtering to obtain liquid phase (the solution of amino phenylmether, methanol and water), separation and refining.

The invention relates to the field of metal materials, in particular to a high-strength high-plasticity magnesium alloy and a preparation method thereof. The magnesium alloy comprises the chemical components by mass percent: 6.1-9.5% of aluminum, 1.0-5.0% of tin, and the balance of magnesium and additional element/elements. The additional element/elements is/are one or more types of silicon, yttrium, strontium and stibium. The magnesium alloy comprises the following additional elements by mass percent: 0-3.0% of silicon, 0-3.0% of yttrium, 0-0.2% of strontium and 0-2.0% of stibium. The preparation method comprises the following steps: under the protection of gas, melting the preheated pure magnesium at a preset temperature, adding the preheated aluminum and the tin in a certain proportioninto the melt, keeping static at a constant temperature, heating to a higher preset temperature, adding the additional element/elements, keeping static at a constant temperature, evenly stirring, refining, removing the slag, and finally casting into ingots. The magnesium alloy has the advantages of high strength and high plasticity; and the preparation method has the advantages of simple technique, high reliability, easy popularization and application, and the like.