102results about How to "Large expansion coefficient" patented technology

The invention discloses a finite element model correction method for a large-span steel bridge based on a uniform temperature response monitoring value, and the method comprises the following steps: 1), carrying out the analysis of yearly monitoring data of the large-span steel bridge, and finding a response law of a structure under the action of a uniform temperature field; 2), building a preliminary finite element model according to design data; 3), preliminarily determining the horizontal rigidness of a steel bridge supporting seat through employing an iteration method; 4), carrying out the sensitivity analysis of the large-span bridge based on the temperature response data of the large-span bridge, and determining a design variable with the higher coefficient of association with actual measurement data; 5), carrying out the optimization analysis of a large-span bridge finite element model through reducing the difference between a finite element model calculation result and the actual measurement data. Compared with a commonly used finite element model correction method based on a power response result (test modal data), the method is simple and accurate, is lower in cost, and is good in safety.

The invention discloses a unit temperature response monitoring value based correction method for a finite element model of a large-span steel bridge. The method comprises the following major steps of 1) analyzing annual monitoring data of the large-span steel bridge and determining static strain and displacement generated by unit uniform temperature change based on a relative probability histogram of a structure response value during unit temperature change; 2) establishing a primary finite element model according to design data; 3) preliminarily determining the horizontal stiffness of a steel bridge support by adopting an iterative method; 4) performing sensitivity analysis on the large-span steel bridge based on actual measurement data of displacement at the large-span steel bridge support and strain in a key position, and determining a design variable with a relatively high coefficient of correlation with the actual measurement data; and 5) performing optimization analysis on the finite element model of the large-span steel bridge by reducing a difference value of a finite element calculation result and the actual measurement data. Compared with a generally adopted finite element model correction method based on dynamic response results of test modal data and the like, the method has the advantages of simplicity, accuracy, relatively low expense and high security.

The invention relates to a heat radiating material and an LED lamp. The heat radiating material comprises an insulation layer, a heat conduction layer, a heat transferring layer, a heat radiating layer and a protection layer. The heat conduction layer comprises the following components in parts by weight: 80 to 95 parts of graphene, 0.1 to 20 parts of a carbon nano-tube and 0.1 to 20 parts of nano carbon fibers; the heat radiating layer comprises the following components in parts by weight: 47 to 50 parts of copper, 49 to 52 parts of aluminum, 0.2 to 0.7 part of magnesium, 0.2 to 0.7 part of iron, 0.2 to 0.5 part of manganese, 0.1 to 0.3 part of titanium, 0.05 to 0.1 part of chromium and 0.1 to 0.3 part of niobium. The heat radiating material is provided with the insulation layer, the heat conduction layer, the heat transferring layer, the heat radiating layer and the protection layer which are sequentially laminated, so that the heat radiating material has advantages of good insulation property, low expansion coefficient, large heat conduction coefficient, good heat radiating effect and light weight.

The invention provides a deep well gas injection supercharging mechanical oil extraction method and device, which belongs to the method or equipment technique field for extracting oil from well, and solves insufficient lifting ability problem of prior mechanical oil extraction method and device, the method uses a deep well gas injection supercharging oil extraction device, and specifically includes the steps of: connecting a sealing base, a supercharging oil extraction pump, a pump fastening rack, a packer, a filter tube valve and a filter tube to the oil conduit, placing the oil conduit into the well bore casing tube, and fastening the pump-fastening rack; injecting liquid into the annular spacing between the oil conduit and casing tube, testing pressure and relieving pressure; injecting gas into the annular spacing between the oil conduit and the air injection tube, discharging liquid from the gas injection tube; installing wellhead equipment, adjusting pressure and air flow of pumped air, sampling humidity and oil content of analysis gas, calculating quantity of production. The method and device provided by the invention use gas as power medium for periodic duty recyclablely, which causes the lifting pressure up to 2-5 times of gas pressure, and the process flow is simple and is suitable for oil extraction of deep well and mechanical oil extraction of thick oil well.

The invention relates to the technical field of oil extraction of oil fields, in particular to a diversified carbon-dioxide flooding oil extraction method. By adjusting parameters including minimum mixed-phase pressure, injection ratio, injection pressure, injection speed and the like of liquid carbon dioxide and water and utilizing alternative injection and flooding of the carbon dioxide and the water to perform crude oil extraction, the oil extraction speed and the recovery efficiency are improved.

The invention provides konjac fermented food and beverage and a preparation method thereof, and relates to the technical field of food and beverage processing. The preparation method comprises the following steps: preparing konjac fluid, preparing primary seed fluid, preparing secondary seed fluid, inoculating and fermenting, and preparing a finished product. The konjac fermented food and beverage have the advantages that konjac glucomannan (KGM) is high molecular polysaccharide, has an effect of promoting growth of bifidobacterium of human intestinal tracts, so that the structure of intestinal flora can be effectively improved. Lactic acid bacteria are normal flora of a human body, and the probiotics represented by the lactic acid bacteria is necessary to the human body, and are beneficial bacteria with critical physiological functions, so that animal growth can be promoted, normal flora of gastrointestinal tracts can be regulated, the micro-ecological balance can be maintained, the gastrointestinal tract functions can be improved, body immunity is improved. Carbon sourced substances are required when lactic acid bacteria ferment, starch is the carbon source for growth and metabolism of microorganisms, and 10 to 30 percent of the konjac is starch, so that the konjac can be effectively used as the carbon sourced substance in lactic acid bacteria fermentation. Therefore, the content of effective components of konjac is taken, and the process of lactic acid bacteria fermentation is introduced, so that the konjac fermented food and beverage can be a perfect combination of the two advantages technologically.

The invention discloses a fire stopping ring core material and a preparation method and use thereof. The fire stopping ring core material consists of a core material solidifying agent, a flame-retarding agent, a carbonizing agent, a carbonization catalyst, a foaming agent, an expansible material, a reinforcing body, glue and other materials. The fire stopping ring core material disclosed by the invention has the advantages of environment protection, convenience and low cost; and at a certain temperature, the fire stopping ring core material can be used for quick plugging, the expansion factor of the fire stopping ring core material is high and the fire resistant time is long.

The invention discloses Ge-As-Se infrared glass with an anti-reflection film and a preparation method thereof. The Ge-As-Se infrared glass with the anti-reflection film comprises a Ge-As-Se infrared glass base layer, the Ge-As-Se infrared glass base layer is composed of 12% of Ge, 28% of As and 60% of Se by weight, and a first ytterbium fluoride layer, a first zinc sulfide layer, a second ytterbium fluoride layer and a second zinc sulfide layer are deposited on the Ge-As-Se infrared glass base layer successively. The Ge-As-Se infrared glass of the invention can effectively prevent the anti-reflection film from falloff, and the reflectivity of the infrared glass is reduced.

The invention discloses a preparation method of jade cracked ice glazed porcelain. The preparation method comprises the steps of preparing a biscuit of the porcelain, applying glaze of 0.8-2mm to the surface of the biscuit to make a green body, and firing the green body to prepare the porcelain. The following raw materials of the glaze are added according to parts by weight: 70-80 parts of anorthite, 15-20 parts of barium carbonate, 0-0.5 part of zinc oxide, 0-0.5 part of zirconium oxide, 5-10 parts of wollastonite, 10-15 parts of boron oxide, 20-30 parts of neodymium oxide, 0-1 part of white mica and 5-10 parts of titanium stones. In the preparation method, the expansion coefficient of a glaze layer is greater than the coefficient of thermal expansion of the biscuit and in the firing process, as the expansion coefficients are different, the tensile stress of the porcelain occurs, the glaze splits and cracks are formed; meanwhile, the glaze layer can generate silicate neodymium crystals, so that small crystal patterns show up in the ice cracks, and therefore, the ornamental value is improved.

The invention provides a preparation method of a silicon dioxide composite material for a negative electrode of a lithium-ion battery. The method comprises three processes, namely preparation of a [carbon nanotube/silicon dioxide] composite material, preparation of a silicon dioxide precursor and preparation of the silicon dioxide composite material. Ethyl alcohol, distilled water, ammonium hydroxide, hexadecyl trimethyl ammonium bromide, acid-treated carbon nanotube, ethyl orthosilicate, deionized water and absolute ethyl alcohol are utilized in the preparation process of the [carbon nanotube/silicon dioxide] composite material. The carbon nanotube in the prepared silicon dioxide composite material has relatively high conductivity, large specific surface area and relatively large expansion coefficient as an inner core; the expansion effect of the silicon dioxide in the charging and discharging process of the lithium-ion battery can be reduced; the structure stability of the silicon dioxide composite material is improved; and the cycle performance of the silicon dioxide composite material is finally improved.

The invention belongs to the field of chemical plating solutions, and in particular relates to a chemical-plated multifunctional nickel-tin-phosphorus alloy plating solution and a plating layer thereof. The plating solution is composed of the following components: 0.08-0.29mol/L of NiSO4.6H2O, 0.3-1.12mol/L of NaH2PO2.H2O, 0.08-0.26mol/L of SnCl4.3H2O, 0.04-3.0mol/L of composite carboxylic acid complexing agent, 0.01-0.04mol/L of amino catalytic complexing agent, 15-100PPm of surfactant and the balance of water. The plating solution is free from Pb and Cd heavy metal ions and more environment-friendly and has high stability and high deposition speed. Due to the increase of the Sn ions, the ductility of the plating layer is greatly improved, the hydrogen sulfide, chloride and carbon dioxide corrosive resistance of the plating layer is improved, the corrosion potential is more negative, the conductivity is better, and the plating layer can be used as a better invisible material.

The invention discloses a method for planting rivier giantarum rhizomes through ditching, film laying and ridging. The method achieves fertilizer conservation, heat preservation, disease resistance, high yield and convenient digging. The method comprises the specific steps that 50-300 g of rivier giantarum rhizomes are selected as seed rivier giantarum rhizomes; ditches with the width of 0.8-1.2 m and the depth of 20-30 cm are dug, and black microhole mulching films are laid on the bottoms of the ditches; farmyard manure is laid on the black microhole mulching films and covered with soil with the thickness of 2-5 cm; the seed rivier giantarum rhizomes are placed on the soil layer according to the certain row spacing and line spacing, and then earthing and ridging are carried out, wherein the height of ridges is 20-40 cm; the ridge faces are covered with grass with the thickness of 2-5 cm; 1000-1500 jin of farmyard manure is applied to each mu of land. A row of corn can be planted on the sides of the ridges. The fertilizer efficiency can be sufficiently utilized, the production cost is reduced, it is ensured that the rivier giantarum rhizomes are dug conveniently and rapidly, and the digging cost can be saved by 400-500 yuan for per mu.

The invention discloses a thermal conductive plastic alloy used for a radiator, a radiator and a preparation method. The thermal conductive plastic alloy comprises polybutene or polyisobutene, polyethylene, graphite powder, carbon fiber, thermal conductive carbon black, a thermal conductive reinforcing agent, a titanate coupling agent and stearic acid. The thermal conductive plastic alloy is subjected to granulation, then pipe drawing and injection molding are carried out, an inner water channel pipe and a connecting piece of an radiator are prepared, the inner water channel pipe is expanded into an inner hole of an aluminum wing pipe of the radiator to obtain a radiator column material or sheet material, the column material or the sheet material and the connecting piece are subjected to sweat soldering to prepare a radiator single sheet, and finally the radiator single sheets are subjected to sweat soldering to compose a radiator. The thermal conductive plastic alloy and the radiator are advantaged by good environmental protection and excellent heat radiation performance, are stable and durable, and have protruding characteristics of no fouling, no rusting, no corrosion, no cracking, no pollution, no deformation, no abnormal sound and no aging.

The invention relates to a method for killing wood moth larvae and repairing a wormhole. According to the method, bentonite, green muscardine fungi and bacillus thuringiensis are blended into unguent, the blended unguent is filled into a defecation hole for the wood moth larvae by the aid of a grease gun until the unguent overflows from a filling position, the bentonite is solidified to fill the whole wormhole, so that the wood moth larvae die due to asphyxia and mechanical injury, the wormhole is repaired, and the wood moth larvae are killed.

The invention relates to a sanitary installation part (1) which, along with a functional unit (7), forms a quantity regulator, it is proposed that a regulating element (13), which can be adjusted along an adjustment path, be coupled to a temperature-sensitive drive unit (15) such that different regulating positions of the regulating element (13) are set in dependence on the temperature of the medium flowing through the installation part (1), wherein the different regulating positions realize in each case different volume-flow dependencies (11, 12, 45, 48) and/or flow resistances (cf. figure 1).

The invention discloses a giant magnetostrictive material-driven intelligent boring rod, which comprises a static pressure boring machine spindle, wherein a fixed seat is fixedly arranged on the static pressure boring machine spindle; an upper excitation coil bracket and a lower excitation coil bracket are fixedly arranged on the fixed seat respectively; an upper giant magnetostrictive rod and a lower giant magnetostrictive rod are fixedly arranged on the upper and lower excitation coil brackets respectively; excitation coils are correspondingly wound outside the upper and lower giant magnetostrictive rods on the upper and lower excitation coil brackets respectively; a boring rod is fixedly connected between the upper and lower giant magnetostrictive rods; a cutting tool is fixedly connected to the front end of the boring rod. The giant magnetostrictive material-driven intelligent boring rod is reasonable and reliable in structure; the giant magnetostrictive rods can extend and contract under the action of a magnetic field to drive the boring rod to be axially deflected to radially feed the cutting tool for the boring machining of an irregularly-shaped pinhole.

The invention relates to a construction method of existing railway tunnel overhaul polyurethane plugging agent high-pressure grouting. Existing railway cracks are plugged and grouted by cleaning the surface, drilling, embedding needle heads, grouting and removing a grouting pipe, and water stopping and plugging effects are performed.

The invention discloses a prescription of a cover plate glass for a light touch screen. Experiments show that the major ingredients of the cover plate glass contain SiO2, Al2O3, Na2O, K2O and CaO, for the glass prepared according to the prescription provided by the invention, the aim of improving the coefficient of thermal expansion is realized by regulating the contents of the ingredients in the prescription, and simultaneously, improving the coefficient of thermal expansion of the glass by using the large proportion of metals containing Ba and Sr is avoided; in the prescription provided by the invention, CaO is selected instead of MgO, the MgO is not added, devitrification tendency of the glass can be lowered, the high-temperature viscosity can be lowered, melting is facilitated, and after being enhanced chemically, the glass can effectively prevent the impact and the scratch damage to the protective screen surface of the touch products, and prolong the service life of the products with touch screens.

The invention mainly relates to the technical field of ceramic glaze processing, and discloses a high-temperature environment-friendly antibacterial glaze. The high-temperature environment-friendly antibacterial glaze is prepared from the following raw materials: silicon dioxide, zinc oxide, iron nitride, aluminum oxide, niobium pentoxide, vanadium boride, tantalum pentoxide, hafnium oxide, table salt and an antibacterial agent. A ceramic product keeps the original color and luster after being subjected to short-time high-temperature burning, the production cost is lowered by 13.1 percent, and the antibacterial rate is up to 67.4 percent; the ceramic product is safe, environment-friendly and healthy, and no lead or cadmium is dissolved out; the antibacterial agent is abundant in raw materials, has a high antibacterial rate, high heat resistance and high stability, and has antibacterial time being up to 9 years when being used normally; the raw materials are subjected to repeated melting, quenching and ball milling after being subjected to ball milling, the table salt is added after primary quenching, and the antibacterial agent is added after secondary melting, so that the fineness and fluidity of the glaze are improved, an expansion coefficient is matched, and the glaze is smooth; the antibacterial agent is added at a low temperature, and short-time high-temperature treatment is performed, so that the influence on the color and luster of the ceramic product can be avoided, and the antibacterial life can be prolonged.