257results about How to "Solve liquidity problems" patented technology

The invention discloses a high-speed photocuring 3D printing device and method. The device comprises a liquid pool filled with liquid photosensitive resin, a printing platform and a radiation source. A transparent plate corresponding to the printing platform and the radiation source is arranged at the bottom of the liquid pool. The side, facing the printing platform, of the transparent plate is covered with a transparent anti-bonding coating. The device further comprises a liquid outlet and a liquid inlet which are formed in the side wall of the liquid pool, a pipeline connecting the liquid outlet and the liquid inlet, and a drive unit which is arranged on the pipeline and used for driving the liquid photosensitive resin to flow among the liquid outlet, the liquid inlet and the pipeline. A curing window is coated with the transparent anti-bonding coating, and therefore the problem that the curing photosensitive resin is bonded and attached to a glass plate due to excessively fast laser radiation is avoided. Pipelines promoting flowing of the liquid photosensitive resin are arranged on the two sides of a printing area, the mobility of the photosensitive resin near the printing area is improved, supplementing of the photosensitive resin is accelerated, and rapid printing of the SLA is achieved.

The invention relates to a manufactured sand underwater dispersion resistant concrete, which comprises the following components in parts by weight: 100 parts of cement, 1-5 parts of underwater dispersion resistant additive, 2-20 parts of silica fume, 1-20 parts of coal ash, 1-10 parts of an enhancer, 140-200 parts of manufactured sand, 140-200 parts of macadam, and 30-50 parts of water. The preparation method comprises the following steps of firstly putting the manufactured sand, the macadam aggregate, the cement, the enhancer, the coal ash and the silica fume into an agitator, blending through dry mixing, then adding the underwater dispersion resistant additive to further blend through dry mixing, adding water into the material blended through dry mixing previously, stirring for 5-8 minutes, then preparing the manufactured sand underwater dispersion resistant concrete. The manufactured sand underwater dispersion resistant concrete has strong construction mobility, so that the problem of contradiction of mobility and dispersion resistance of the underwater dispersion resistant concrete is better solved, and therefore, the manufactured sand underwater dispersion resistant concrete not only has good dispersion resistance, but also has self-leveling and self-compaction construction mobility.

The invention relates to a nanometer molten binary nitrate heat-transfer heat-storage medium and a preparation method thereof and belongs to the field of solar photo-thermal electricity generation. The nanometer molten binary nitrate heat-transfer heat-storage medium is characterized in that nano-particles are dispersed in a KNO3-NaNO3 and KNO3-NaNO2 solid-liquid phase-change molten binary nitrate system at a high temperature so that the nanometer molten binary nitrate heat-transfer heat-storage medium is compounded, and the nano-particles comprise SiO2, ZnO, Al2O3, TiO2, CaO and/or MgO nanoparticles. The nanometer molten binary nitrate heat-transfer heat-storage medium solves the problem that the existing nanometer molten binary nitrate system has a low heat conductivity coefficient, poor heat stability and a narrow use temperature scope and can be widely used in the technical field of solar photo-thermal electricity generation.

The invention discloses a reactor primary loop coolant flow field, temperature field and stress field coupling calculation method. The method comprises the following steps: 1) constructing a high-temperature gas cooled reactor core model and a steam generator model with the same size as actual equipment; 2) establishing a computational domain 1, a computational domain 2 and a computational domain3; 3) setting equipment materials and fluid domains in the computational domain 1, the computational domain 2 and the computational domain 3; 4) setting areas and boundary layers of a flow field, a temperature field and a stress field; 5) meshing the flow field, the temperature field and the stress field; 6) adopting a k-epsilon turbulence model in the computational domain 1 and the computationaldomain 3, and adopting a porous medium model in the computational domain 2; 7) obtaining flow field, temperature field and stress field distribution results of the computational domain 1, the computational domain 2 and the computational domain 3, and 8) obtaining optimal operation parameter configuration of the high-temperature gas cooled reactor at different power levels. The method can realize coupling numerical simulation calculation of the coolant flow field, the temperature field and the stress field of a reactor primary loop.

The invention relates to a tablet composition of antidepressant flupentixol and melitracen and a preparation method of the tablet composition. The composition comprises flupentixol (the particle size distribution D90 is smaller than 150mu m), melitracen, a filling agent, a disintegrating agent, an adhesive and a lubricating agent. The tablet composition is prepared from full-powder in a direct tabletting manner; and the method comprises the following steps: mixing step by step; tabletting; and coating and the like. The manufacturing process is simple; pelletizing and drying are avoided; energy and time are saved; the stability of active components is protected; the disintegration property and the dissolution rate of the tablet are improved; and the prepared tablet composition of antidepressant flupentixol and melitracen is stable in quality, low in impurity content, safe and good in effectiveness.

The invention discloses camellia oil microcapsule powder and a preparation method thereof. The camellia oil microcapsule powder comprises a core material and a capsule material for coating the core material, wherein the core material includes 1 part of camellia oil by weight, and the capsule material includes 0.8-9 parts of modified polysaccharide-SSOS (starch sodium octenyl succinate) by weight.The preparation method is as follows: camellia oil is added into an aqueous solution of SSOS, the solution is stirred to be a uniform emulsion system, the emulsion is subjected to high-pressure homogenizing through a high-pressure homogenizing machine to form a camellia oil emulsion, then camellia oil emulsion is subjected to spray drying or freeze drying, and finally the while camellia oil microcapsule powder with the grain size less than 1000 nm can be obtained and has high stability and good flowability. The camellia oil microcapsule powder keeps the activity of camellia oil, improves the stability and the bioavailability of camellia oil, and can be applied to food and health care products.

A two phase flow ground simulation test method and a device under a flying loading action belongs to the technical field of measuring two phase flow. The method utilizes a flying dynamic loading simulation platform to simulate the dynamic loading state of an airplane and acquires different centripetal accelerations through adjusting the rotary speed of a dial so as to simulate the flying loading state. The device consists of the flying dynamic loading simulation platform and a two phase flow test system; wherein, the two phase flow test system consists of a floating water circulating system, a liquid parameter measuring system and a data collecting and storing system. The method and the device can carry out the two phase flow ground simulation test under the flying loading action on the ground.

The invention discloses a soft PP flame retardant with ultrahigh fluidity. The soft PP flame retardant is prepared from 40-90% by mass of a base resin, 2-40% of a flame retardant, 1-30% of polar cooling master batches, 0.05-1% by mass of an antioxidant, 0.2-5% by mass of a dispersant, 0.1-1% by mass of a UV absorbent and 0.1-1% by mass of a light stabilizer. The soft PP flame retardant has low hardness, a good hand feeling, a low processing temperature, a narrow molecular weight distribution range, spinning easiness, good toughness, no precipitation, aging resistance, excellent mechanical properties, good adhesion to polyester, polyethylene and polypropylene, short consumption time, high production efficiency, production convenience, industrial production feasibility and good application prospect in a PP flame-retardant non-woven fabric.

The invention provides a powder metallurgy injection molding process, belonging to the technical field of powder metallurgy. The powder metallurgy injection molding process comprises the following steps of: 1), mixing metal powder and a bonding agent according to a ratio; 2), feeding: putting a mixture of the metal powder and the bonding agent into a pre-designed and manufactured mould cavity; heating to 120-140 DEG C under the protection of ammonia gas to carry out warm pressing molding; and in a molding process, vibrating the mould cavity; 3), degreasing: after de-molding, heating a molded product to 250-300 DEG C; and 4), sintering: sintering at a vacuum state, wherein the sintering temperature is 850-1000 DEG C and the heat-preservation time is 1-2.5 hours. The invention provides a pulse periodic vibration mixing method aiming to solve the technical problems of defects of the prior art that the agitation is not uniform and the product stability is poor; and the disadvantages of poor mobility and mixing performance of raw materials in an injection molding process are overcome, the product density is high and the distribution is uniform.

The invention discloses a preparation method for a single-layer graphene-enhanced aluminium-based composite material, relates to a preparation method for an aluminium-based composite material, and aims to solve the problems of high cost and great dispersing difficulty in the application of a single-layer graphene-enhanced aluminium-based composite material field at present. The preparation method comprises the following steps: firstly, weighing multi-layer graphene micro-flake aluminium metal powder, and weighing industrial pure aluminium block bodies, wherein the industrial pure aluminium block bodies and the multi-layer graphene micro-flake aluminium metal powder are in the weight ratio of (3-10):1; secondly, dispersing multi-layer graphene micro-flakes and moulding a precast block; thirdly, performing aluminium metal infiltration; fourthly, performing large plastic deformation; fifthly, performing high-temperature fusion treatment; sixthly, performing repeated plastic deformation and high-temperature fusion treatment. According to the preparation method for the single-layer graphene-enhanced aluminium-based composite material, the low-cost multi-layer graphene micro-flakes are taken as a raw material of an enhanced body, so that the cost is low; the content of single-layer graphene in the obtained composite material can reach 4 weight percent at most. The preparation method is applicable to preparing the single-layer graphene-enhanced aluminium-based composite material.

The invention relates to orally disintegrating tablets containing lurasidone and a preparation method thereof. The orally disintegrating tablets comprise lurasidone hydrochloride, filler, disintegrant, flavoring agent and lubricant, wherein the grain diameter D90 of the lurasidone hydrochloride is less than or equal to 75 mu m. The lurasidone orally disintegrating tablets have good dissolution in vitro and excellent taste; the orally disintegrating tables are simple in preparation process, and industrial production can be realized by adopting conventional granulation and tabletting equipment.

The invention relates to machine-made dry-mixed plaster mortar suitable for mechanized spraying. The mortar is composed of the components of, by mass, 0-60% of limestone, 0-60% of limestone tailing, 0-28% of yellow sand, 9-25% of cement, and balance of an additive. The limestone and the limestone tailing are not simultaneously 0. The additive is a mixture of hydroxypropyl methyl cellulose ether, starch ether, re-dispersible latex powder and a thixotropic lubricant. According to the invention, through changing the component ratio of common plaster mortar, and with the additive and thickening agent with special performances, the problems of incapability to adapt to mechanized spraying caused by high angularity, poor fluidity, and high seepage rate of machine-made sand are solved. The mortar is a clean, energy-saving, and highly efficient representative in construction.

The invention discloses a low-temperature automobile expansion adhesive. The low-temperature automobile expansion adhesive is made of the following raw materials in parts by weight: 100 parts of a polymer, 3-5 parts of a peroxide vulcanization agent, 0.5-3 parts of a vulcanization auxiliary agent, 5-15 parts of a foaming agent, 0.5-8 parts of a foaming activator, 1-10 parts of a filler, 2-15 partsof a tackifier, 0.5-3 parts of a lubricant, 0-2 parts of an antioxidant, and 0-10 parts of a flame retardant. According to the low-temperature automobile expansion adhesive, the raw material composition is carefully chosen, the content of each raw material is optimized, and the prepared low-temperature automobile expansion adhesive has high foaming ratio and small product density, and can fill large cavities. The expansion adhesive has high bonding strength with an ABS framework member. The expansion adhesive has good high-temperature baking stability. The expansion adhesive after foaming isnot easy to collapse and shrink. The low-temperature foaming performance and high-temperature foaming ratio are well balanced. The storage stability is good, the product quality is stable, and a storage period is relatively long.

The invention discloses a multi-tube-row integrated header automatic adjusting dispensing condenser, comprising a first header, a second header, and heat exchange tubes. The header which is provided with an inlet pipe is provided with septums. The first header and the second header are internally provided with gas-liquid separators. The outlet tube segments of the heat exchange tubes extend into the cavity of the header, and the ends of the outlet tube segments bend downward. Or the outlet tube segments of the heat exchange tubes extend into the cavity of the header, and the outlet tube segments of the heat exchange tubes beveling downward from the diameter of the outlet tube segment and form bevel connections. Beneficial technical effects of the condenser are that heat transfer flowing performance of the condenser is improved, uniformity of working medium distribution is effectively improved, flow resistance is greatly reduced and high-efficiency heat exchange is maintained, a condensate liquid is prevented from being brought out of the headers, so as to greatly improve dispending effect of the headers on two ends, high-efficiency heat exchange flow state in tubes can be maintained on the tail of the condenser and under condition of lower area flow, and effect of enhancing heat transfer based on a dispensing condensing principle is improved.

The invention discloses a system and a method for simulating water inrush from coal mining floor above artesian water aquifers. The system is composed of a two-dimensional similar simulation experimental device, a loading device, a rising guide device and a data acquisition device, wherein the two-dimensional similar simulation experimental device comprises a test bed; the rising guide device comprises a sac body, a board guard trough, a U-shaped groove and a rising guide pipe positioned on the upper surface of the sac body, the U-shaped groove is disposed on the bottom plate of the test bed, the sac body is fixed in the U-shaped groove, the board guard trough is arranged at two sides of the bottom plate, a plurality of holes are formed on the inner wall of the board guard trough, a plurality of branched pipes are arranged on the rising guide pipe at uniform intervals in a vertical direction, and are disposed at the outer side of a model when the model is laid. The system can monitor the formation process of the water inrush channel of the coal mining floor above artesian water aquifers and the rising guide position of artesian water, thereby having a certain guiding significance on simulation of water inrush from coal mining floor above artesian water aquifers.

The invention relates to a hydraulic brake which is fit for the brake of a high-speed hydraulic motor. The hydraulic brake essentially consists of a casing, a principal axis arranged in the casing, a piston which is sleeved at the principal axis, a driving friction plate, a driven friction plate, a left end cover and a right end cover. An axis center at an end of the principal axis matching with the hydraulic motor is provided with a blind hole. The principal axis is provided with a plurality of pores which are communicated with the blind hole of the axis center. The right sides of the driving friction plate and the driven friction plate are provided with a friction plate baffle, and the left sides are provided with an oil cylinder piston. The outer end of the oil cylinder piston is provided with the left end cover which is sleeved at the principal axis and is fixed with the casing. A deep groove ball bearing is arranged between an axle sleeve of the left end cover and the principal axis. A disc type spring is arranged between the oil cylinder piston and the axle sleeve of the left end cover. The outer end of the friction plate baffle is provided with the right end cover which is sleeved at the principal axis and is fixed with the casing. A tapper rolling bearing is arranged between the right end cover sleeved at the principal axis and the principal axis. The hydraulic brake has compact structure, small size, low cost, wide speed adjusting, strong commonality, good brake effect, convenient installation, simple operation and convenient maintenance and does not require manual operation.

The invention provides a method for protecting a converter with vanadium slag, which comprises the following steps: adding vanadium-iron-containing water into a vanadium extraction converter, and adding quartz sand into the vanadium-iron-containing water to regulate the SiO2 content in the vanadium slag to 16-18%; after the converting starts, adding 10-25 kg/tFe magnesite, and adding 25-35 kg/tFe vanadium extraction cooling agent, wherein the converting time is controlled at 5-7 minutes, and the semisteel temperature is controlled at 1400-1450 DEG C; and after the converting finishes, tapping, blowing nitrogen with an oxygen lance to perform slag splashing on the vanadium slag. The invention can effectively solve the problems of poor flowability and difficulty in adhesion of the vanadium slag, and can improve the slag suspension effect, enhance the erosion resistance of the converter lining and effectively prolong the service life of the vanadium extraction converter lining when being used for slag splashing converter protection.

The invention discloses polycarbonate/glass fiber alloy used for the cold resistant housing of an intelligent water meter and a preparation method thereof. The polycarbonate/glass fiber alloy comprises, by weight, 30 to 50 parts of PC, 30 to 50 parts of an PC recycled material, 0.3 to 0.5 part of a fireproof agent FR2025, 0.5 part to 2 parts of titanium dioxide, 9.5 to 11.5 part of glass fiber, 2 to 5 parts of EMA, 0.1 to 0.5 part of an anti-oxidant1010, 0.1 to 0.5 part of an anti-oxidant 168, 0.3 to 0.5 part of an ultraviolet resistant agent UV-531, 0.03 to 0.08 part of diffusion powder EBS, 0.04 to 0.08 part of ultramarine blue powder, 0.02 to 0.04 part of iron oxide red powder 0.005 to 0.01 part of high temperature resistant florescent yellow powder and 2 to 5 parts of a cold resisting agent 2602. The alloy has the characteristics of high performance, high cold resistance, high fire retardancy, high impact, high stability, resistance to static electricity and the like, and can be used for preparing the housing of intelligent water meters used in chilly regions and for preparing terminal rows.

The invention provides a method for balancing moisture in wood by microwave, which belongs to the field of wood processing. Currently, in order to solve the problem of uneven water ratio, the prior mode is to put wood which is generally dried in a health preserving room, control temperature and humidity in space, and process the product after at least 10 days of temperature and humility control to ensure the evenness of the water ratio inside the wood. Thicker wood requires more time, even requires about a month. With the prior treatment mode, the materials not only occupy mass fields and storage capacity, but also use great capital, and have low efficiency. The method comprises the following steps: a sawed timber or a wood part which is subjected to the prior drying or air drying with water ratio of between 8 and 15 percent is treated by microwave for 3 to 30 seconds with power density of microwave radiation of between 0.5 and 5 watt/centimeter<3>, the gradient and the stress of water ratio of treated wood are obviously reduced. The method has the advantages of simple process, good treatment effect, capability of continuous treatment and the like.

The invention relates to the technical application field of coal mine fire preventing and extinguishing, and provides economic and environment-friendly gel foam for preventing and curing coal spontaneous combustion. The economic and environment-friendly gel foam is prepared from the components in percentage by weight: 4% to 35% of water glass, 0.4% to 3% of a foaming agent, 0.1% to 3% of a foam stabilizing agent, 1% to 5% of a coagulant, and the balance of water; and the foaming agent is formed by compounding two or more anionic-type foaming agents. According to the economic and environment-friendly gel foam for preventing and curing coal spontaneous combustion, the adopted foaming agent is formed by compounding two or more anionic-type foaming agents, an adopted gelatinizing system is composed of the water glass and the coagulant, the cost is low, economy and environmental protection are realized, and the gel foam is non-poisonous and harmless during using and has good economic benefits. The obtained gel foam maintains the advantages of high fluidity and good aggregation of water-based foam before gelatinizing, and after gelatinizing, the advantages of the outstanding cooling effect and the good leak sealing effect of water glass gel are maintained; and the gel foam is good in inhibition and fire extinguishing effect, the fire source temperature, thermal radiation and CO output can be significantly reduced, fire extinguishing is stable, and the reignition phenomenon does not occur.

The invention relates to a preparation method for liquid polyborosilazane and belongs to the field of inorganic nonmetallic materials. The preparation method comprises the following steps: liquid polyborosilazane and 9-borabicyclo [3,3,1]-nonane are added in a solvent in inert atmosphere to obtain mixed solution, then the obtained mixed solution is hydroborated under the stirring condition, and then the solvent is removed after completion of hydroboration to obtain the liquid polyborosilazane. The preparation method solves the problems in the traditional polymer route that excessive cross-linking is easily caused in the hydroboration addition reaction, and solid polyborosilazane has poorer fluidity. The prepared liquid polyborosilazane has good fluidity and high ceramic yield and can be directly used for the high polymer infiltration and pyrolysis method for preparing SiBCN ceramic matrix composites.

The invention discloses a pre-foaming high-expansion polyurethane caulking compound which is mainly composed of the following raw materials by weight: 18 to 35 parts of polyether polyol, 2 to 15 parts of polyester polyol, 30 to 45 parts of polymethylisocyanate, 8 to 10 parts of dimethyl dimethanamide and 10 to 15 parts of a solvent. Polyether polyol, polyester polyol, polymethylisocyanate, dimethyl dimethanamide and the solvent are mixed together and stirred at room temperature, then an obtained mixture is filled into a pressure vessel, and finally an additive is filled into the pressure vessel. The caulking compound provided by the invention is a pre-foaming product, foaming of the caulking compound reaches 80 to 90% in seconds after the caulking compound is extruded, the extent of later foaming is small, so a worker can well control hand power when using a foaming gun, easiness and convenience are realized, glue is not wasted, cost is substantially saved, and deformation of a product is avoided. The caulking compound has high expansion performance and has a foaming volume reaching 70 to 80 times, one time greater that of a traditional caulking compound, and production cost is reduced.

A preparing method of a viscosity modifying material specially used for self-compacting concrete for CRTSIII type plates is disclosed. The viscosity modifying material is prepared by fully mixing fumed silica, calcium carbonate, low-viscosity hydroxyethyl cellulose, high-viscosity hydroxyethyl cellulose, a thixotropy modifier and water-soluble polymer rubber powder. The viscosity modifying material comprises 45-55% by mass of the fumed silica, 43-55% by mass of nanometer calcium carbonate, 0-0.5% by mass of the low-viscosity hydroxyethyl cellulose, 0-0.5% by mass of the high-viscosity hydroxyethyl cellulose, 0-2% by mass of the thixotropy modifier and 2-4% by mass of the water-soluble polymer rubber powder.

The invention discloses a method for achieving staggered reverse spinning of pairs of wheels. According to the method, 2-4 pairs of spinning wheels are adopted, and the parameters including angles ofattack, working circular angles and receding angles of each pair of spinning wheels are equal; in each pair of spinning wheels, the distance between each workblank axis and a central point of a connection line between the center of the inward spinning wheel and the center of the outward spinning wheel is equal. By means of the method, the stress center of each workblank in the radial direction ispositioned at the circumference with the same radius, distortion of the workblanks due to deviated loading of a spinning force is avoided, the deformation rates of materials are unified, the materialscan flow stably, the surfaces of cylinders on which the wheels spin are smooth, and a stacking defect is avoided. Compared with traditional die spinning, spinning of the pairs of wheels has the advantages that the workblanks are processed by the inward spinning wheels and the outward spinning wheels at the same time separately, and the machining efficiency is improved. The machining efficiency ofspinning of the pairs of wheels is improved, the problems that flowing of the materials processed in staggered reverse spinning of the pairs of wheels is unstable and the spinning force is unbalancedcan be effectively solved, and the machining efficiency of spinning of the pairs of wheels can be further improved.