13results about How to "Effective diffusion" patented technology

The application discloses a leak stopping method for directional drilling of ground pre-grouting engineering in complex strata, which comprises the following steps: lowering a grouting drill rod to a leaking layer, continuously injecting clay cement slurry, waiting for the slurry to solidify, lowering the drill rod to sweep the hole and pass through the leaking layer; when the clay cement slurry cannot successfully stop the leak in the drilling of a serious leaking layer, a leak stopping casing with an outer diameter smaller than the inner diameter of a previous drilling structure casing and an inner diameter larger than the outer diameter of a next drilling structure casing is lowered to the depth of the leaking layer before lowering the next drilling structure casing, a grouting pipe is connected to the leak stopping casing, single liquid cement slurry is injected, and the grouting is stopped after the pressure is increased to a set pressure, and the leak is successfully stopped after the cement slurry is solidified, and the drilling construction passes through the leaking layer. The application ensures the effective diffusion of the slurry in the leaking layer, avoids the waste of the leak stopping material, improves the pertinence of the leak stopping, and improves the plugging success rate of the complex strata to more than 95%.

This utility model relates to the field of dust control technology, and in particular to a dust control facility for construction sites, including a handcart. The handcart is equipped with a dust control mechanism for dust control. The dust control mechanism includes: a spray assembly, including a frame fixed on the handcart, a circular plate fixed to the front end of the frame, an arc-shaped tube fixed to the front end of the circular plate via a fixing bracket, a plurality of circumferentially distributed atomizing nozzles installed at the front end of the arc-shaped tube, a cylinder seat fixed to the front end of the circular plate, and a fan blade installed inside the front end of the cylinder seat; a water supply assembly, mounted on the frame and used for water supply; and a drive device, mounted on the frame and used for power supply. Through the circumferential layout of the arc-shaped tube and the circumferential distribution of the atomizing nozzles, the water mist spray range expands in a ring shape. Combined with the airflow propulsion effect of the fan blades, the dust control facility significantly improves the capture efficiency and settling speed of airborne dust.

The invention discloses a residual oil hydrotreating catalyst and a preparation method thereof, and belongs to the technical field of catalytic materials. The preparation method comprises the following steps: S1, mixing dolomite, cerous carbonate, a zirconium oxide precursor and a silicon dioxide precursor, drying and calcining to obtain a composite carrier, and performing in-situ pore forming by utilizing gas generated by decomposition of the dolomite and the cerous carbonate to form a mesoporous structure; s2, dipping the composite carrier in a modification liquid containing chitosan and mannuronic acid, and constructing a cross-linked network coating on the surface of the composite carrier through a Schiff base reaction to obtain a modified carrier; s3, dipping the modified carrier in a precursor solution containing a nickel source, a molybdenum source and a sulfur source, and performing adsorption, drying and roasting to obtain the catalyst. Through the synergistic effect of pore structure regulation and surface modification, the carrier with high porosity and suitable pore distribution is obtained, and meanwhile, high dispersion and stable loading of active metal components are realized. The catalyst shows excellent hydrodesulfurization, denitrification and demetallization performance in residual oil hydrotreatment.

The invention provides a preparation method of an ethylene epoxidation Ag / SiC catalyst, which comprises the following steps: step 1, treating SiC powder with acid, and then treating the SiC powder with alkali to obtain a SiC precursor; step 2, mixing the SiC precursor, a pore-forming agent and an auxiliary agent, molding, and carrying out heat treatment to obtain a SiC molded carrier; step 3, loading a silver precursor on the SiC molding carrier to obtain an ethylene epoxidation Ag / SiC catalyst; wherein the acid comprises fluorine-containing acid and at least one inorganic acid except the fluorine-containing acid, and the alkali is an amine compound. The silicon carbide is subjected to acid erosion treatment, so that the surface roughness of the silicon carbide can be improved, the loaded metal particles are fixed on the surface of the SiC carrier, migration and agglomeration of active component Ag ions in the reaction process are reduced, and the stability of the Ag / SiC catalyst is improved.

The utility model discloses an air cooling device for molding powder production, and relates to the technical field of molding powder production. The fan assembly seat is mounted and connected to the peripheral side of the fan body; the telescopic adjusting mechanisms are mounted and connected to the two ends of the fan assembling seat; the technical effects are that airflow generated by a fan body can be conveyed into an air cooling pipe body of the air cooling collecting and positioning pipe, and when the blown air passes through a secondary cooling mechanism in the air cooling pipe body, the air cooling collecting and positioning pipe can be conveyed into the air cooling pipe body of the air cooling collecting and positioning pipe, so that the air cooling collecting and positioning pipe is not prone to falling off when the blown air passes through the secondary cooling mechanism in the air cooling pipe body. Air flow can be effectively cooled through the secondary cooling mechanism, then cooling air is conveyed into the air flow dispersing mechanism, in this way, the cooling air can be effectively diffused and blown through the air flow dispersing mechanism, dust in an external tank body can be cooled, and cooling is more efficient through wind power air cooled through the secondary cooling mechanism.

The invention discloses a micro-alloying rapid extrusion flame-retardant magnesium alloy and a preparation method thereof, and belongs to the technical field of metal materials. The microalloying fast extrusion flame-retardant magnesium alloy is prepared from the following components in percentage by mass: 1.0 to 1.8 percent of aluminum, 0.3 to 0.4 percent of calcium, 0.4 to 0.6 percent of manganese, 0 to 0.08 percent of nano particles, less than or equal to 0.02 percent of inevitable impurities and the balance of magnesium. Calcium is preferentially oxidized at high temperature to form a compact CaO layer to block oxygen, so that the ignition point of the alloy is obviously improved; a high-density nanophase is dynamically separated out from aluminum and manganese in the rapid extrusion process, the grain boundary is effectively pinned, grain coarsening is inhibited, and the stability of a microstructure below an oxidation film is enhanced; nanoparticles are combined with ultrasonic melt treatment to refine the structure, surface oxidation film microdefects are filled at the same time, and the self-repairing capacity and compactness are improved. According to the design, through microalloying design (the total element content is smaller than or equal to 2.8%), nanoparticle reinforcement and a rapid extrusion process are cooperated, collaborative optimization of low production cost, good flame retardant property and efficient extrusion capacity of the alloy is achieved, and the industrial prospect is wide.

This utility model discloses an intelligent storage, conveying, and suction structure, relating to the field of storage and suction technology. It includes a first outer shell; a material box is integrally formed on the top of one end of the first outer shell; a centrifugal suction machine is fixedly installed on the material box; a auger roller is fitted inside the first outer shell; one end of the auger roller is fixedly installed to a first motor; the first motor is fixedly installed at the end of the first outer shell; a second outer shell is movably installed at the end of the first outer shell away from the first motor via a bearing; a spiral tooth is integrally formed on the surface of the second outer shell; a discharge port is opened at the end of the second outer shell away from the first outer shell; the end of the second outer shell with the discharge port is placed inside a storage device, and the centrifugal suction machine is fixedly installed on the material box, enabling the material to be stored to be drawn into the material box. The material entering the material box is driven by the first motor to rotate the auger roller, thus being conveyed forward to the second outer shell and discharged from the discharge port at the end of the second outer shell.

The utility model discloses an alloy material producing and processing device for an electric furnace, and relates to the technical field of alloy material preparation. A feeding hole and a motor are respectively arranged at the upper part of a cylinder body, and a rotating shaft which movably penetrates into the cylinder body and is coaxial with the cylinder body is arranged at the output end of the motor; a first grinding mechanism used for grinding and mixing raw materials is arranged on the upper portion of a rotating shaft body in the barrel, a material dispersing cover of the first grinding mechanism, a grinding disc and a material collecting hopper are arranged on the upper portion of the rotating shaft body in the barrel, and a second grinding mechanism which is the same as the first grinding mechanism in structure and used for conducting secondary grinding and mixing on the raw materials processed by the first grinding mechanism is arranged on the lower portion of the first grinding mechanism; the lower part of the cylinder body is provided with a discharge port for discharging the ground raw materials; according to the utility model, high-efficiency and high-quality step-by-step grinding treatment can be carried out on alloy raw materials, and the alloy raw materials can be synchronously mixed, so that the processing efficiency of the alloy raw materials is effectively improved.

The invention relates to a three-dimensional display device and an imaging control method thereof, relates to the technical field of space imaging display, and aims to provide a three-dimensional display device capable of expanding a visual angle and reducing visual fatigue. The stereoscopic display device comprises a plurality of pixel units and a light-emitting unit. The pixel unit comprises a pixel cavity, a liquid storage tank, a first electrode and a second electrode. Base liquid is arranged in the pixel cavity and the liquid storage tank, the liquid storage tank is communicated with the pixel cavity, electrowetting liquid and diffusion particles are arranged in the base liquid, the electrowetting liquid and the base liquid are immiscible, and the diffusion particles are affine with the electrowetting liquid and repel the base liquid. A first electrode is arranged in the liquid storage tank, a second electrode is arranged on at least one side of the pixel cavity, and the first electrode and the second electrode are configured to be used for controlling the electrowetting liquid to drive the diffusion particles to switch and move between the pixel cavity and the liquid storage tank. The light-emitting units are configured to irradiate light towards the corresponding pixel cavities, so that the diffusion particles in the pixel cavities scatter the light.

This invention relates to the field of dressing technology, specifically to a medical aesthetic skin wound dressing and its preparation process. The preparation process of a medical aesthetic skin wound dressing includes: preparation of an antibacterial repair agent, preparation of a modified graphene oxide solution, preparation of modified carboxymethyl chitosan, and preparation of a wound hydrogel dressing. The dressing of this invention incorporates an antibacterial repair agent with a conjugated microporous network structure, providing dual potent antibacterial effects through physical confinement and chemical action, creating a sterile microenvironment for wound repair; it uses sericin-hydroxypropyl cellulose modified graphene oxide to solve problems of poor dispersibility and insufficient compatibility, enhancing moisturizing and cell repair activity; and it uses tetramethylolphosphonium sulfate as a crosslinking agent to construct a hydrogel framework, locking in components such as ε-polylysine hydrochloride, resulting in multi-component synergistic antibacterial action and promotion of epidermal regeneration, precisely meeting the needs of delicate, rapid, and scarless healing of medical aesthetic wounds.

This invention relates to the field of photoelectrochemical water splitting materials technology, and particularly to a surface-confined sulfur-doped metal oxide photoanode and its preparation method. The method includes growing a metal oxide nanostructure on an FTO substrate using a hydrothermal method to obtain a metal oxide photoanode; repeatedly performing drop-coating and ignition treatments on the surface of the metal oxide photoanode to obtain an ignition-treated metal oxide photoanode; the drop-coating and ignition treatments include drop-coating sulfur-containing organic matter to form a liquid wet film, and igniting the liquid wet film in an air environment; cleaning and drying the ignition-treated metal oxide photoanode to obtain a surface-confined sulfur-doped metal oxide photoanode. This method utilizes the localized thermal field generated by liquid film combustion to drive sulfur atoms to diffuse to the surface and near-surface layer of the metal oxide, achieving precise surface-confined gradient doping.

The utility model relates to chip packaging technical field discloses a big chip bottom heat dissipation and anti warping device. This big chip bottom heat dissipation and anti warping device includes chip and the PCB encapsulated in the lower chip, and the silicon carbide substrate is encapsulated between chip and PCB, and a plurality of array type distribution's through -hole is seted up on the silicon carbide substrate, is equipped with metal layer on the inner wall of through -hole, and chip and PCB respectively through the tin ball with metal layer carry out electric connection. This structure effectively solved when the chip operating temperature violent change (power cycle), and the risk that the solder joint fatigue cracking, chip warping even breakage because of the large difference of thermal expansion coefficient between PCB and semiconductor chip.

An aerosol-generating device is disclosed. The aerosol-generating device includes: a main body in which an elongated insertion space is formed; and a heater including a conductive track formed by connecting a plurality of tracks in parallel with each other, the heater configured to heat the insertion space. The plurality of rails includes an inner rail and at least one outer rail, both ends of the at least one outer rail are respectively connected to both ends of the inner rail, the at least one outer rail surrounds the outer side or the inner side of the inner rail, and the width of the at least one inner rail is in the range of 0.40 mm to 0.44 mm.