177 results about "Granular media" patented technology

A method of fabricating a magnetic storage medium comprises: forming an underlayer on a heat sink layer; co-sputtering a magnetic material and a thermally insulating nonmagnetic material to form a recording layer on the underlayer, wherein the recording layer includes grains of the magnetic material in a matrix of the thermally insulating nonmagnetic material; and heating the recording layer to align an easy axis of magnetization of the magnetic material in a direction perpendicular to the underlayer. A magnetic storage medium fabricated using the method is also provided.

A process and a reactor vessel for production of hydrogen via the water gas shift reaction at CO/CO₂ ratios above 1.9, and steam to gas rations below 0.5, are disclosed. The process includes first reacting a feed gas mixture of carbon monoxide and steam in the presence of a precious metal catalyst on a structural support, yielding a resultant gas, and then reacting the resultant gas in the presence of a non-precious metal catalyst on a support medium. The reactor vessel includes a chamber having an inlet duct and an outlet. A structural support having the precious metal catalyst is positioned upstream of the non-precious metal catalyst positioned within the chamber. The structural support may be positioned within the inlet duct or within the chamber. The support medium may be a granular medium or a structural support.

The invention discloses a visualization testing method and device for a granular material mechanics experiment. The method comprises the following steps: putting luminous millimeter-sized granules into a visualization loading device capable of applying a compression/shear load; starting a light source to propagate light emitted by the light source along a polarizer, a quarter-wave plate, the visualization loading device, a quarter-wave plate, an analyzer and a camera in sequence; and applying the compression load, the shear load or the combination of the compression load and the shear load to the granules according to corresponding experimental requirements. In a loading process, fringes which are alternately dark and bright are formed in an image acquired by the camera; according to a stress-optical law, the size change of the stresses at different positions in the millimeter-sized granules can be directly observed through the density of the fringes or the light intensity; and after the image acquired by the camera is processed, the stress distribution in granular media can be identified and metered, and the contact stress between the granules, the thickness and angle of shear bands in the granular media and the distribution and trend of mechanical chains can be visualized.

The invention provides an alga-calcium-mineral air purification medium. The air purification medium is mainly prepared from, by weight, 42-48.44 parts of alga mineral powder, 4.2-9.8 parts of calcium powder, 0.8-1.2 parts of catalysis powder, 2.4-3.0 parts of mineral modifiers, 36-48 parts of liquid-phase media and 1.5-1.8 parts of photocatalyst. The raw materials are subjected to pre-stirring, hole forming and granulating, polishing and oxidation, primary drying, photocatalyst surface treatment and secondary drying to form particle medium carriers. The air purification medium has the advantages that the absorption-catalysis-purification performance is outstanding, the preparation process is mild and free of rigorous requirements, product application is flexible, and an air purification device with de-odoring, deodorization, taste removal or bacteria resistance and mildew-proof functions by applying appropriate matched application components.

A continuum style manipulator is actuated by jammable media within an envelope of a module, which is also actuated by a tensile element, such as a cable and spooler motor. Multiple modules may be reversibly added. Two or more tensile elements may also be used. Three or more actuated tensile elements can actuate three DOFs of each module, and the terminal module, as well as the entire manipulator. Jammable media may be granular, actuated by a pressure change. Coarsely ground coffee works well. Rather than a jammable media, tensile elements may alternatively be used with other phase change media, such as magnetorheological and electrorheological media. A high friction angle of the granular media is desirable, and has been achieved with a particle size dispersion including both small and relatively larger particles. Applications include endoscopes, proctoscopes, laparoscopic instruments, manufacturing and medical manipulators. Methods of actuating include unjamming all modules, positioning the manipulator with tensile elements or otherwise, jamming the base-most module, and then repositioning remaining, not-jammed modules, followed by jamming the base-most not-jammed module, and so on, until all modules are positioned and jammed.

Methods and apparatus for forming smoking products include a triple hopper for forming filter components of multiple sizes. The filter components are partially wrapped, and at a downstream location granular media is dispended onto the partially wrapped components. A cover cap is placed over the partially wrapped components to thereby form a complete wrap. Subsequently, the fully wrapped filter components may be joined to tobacco rods with tipping paper.

Embodiments of the invention provide a granular medium structure and a significant increase of the K_u value of a magnetic material at the same time using a non-metal material, thereby obtaining a magnetic recording medium capable of high density recording. In one embodiment, a magnetic metal grain in a granular magnetic film made of magnetic metal grains and a non-magnetic material is obtained by laminating a ferromagnetic exchange metallic element that contains mainly Co or Fe and a Pt element alternately and the lamination period is set between about 0.35 nm and 0.9 nm, preferably between about 0.4 nm and 0.55 nm.

Disclosed is a die for deep drawing of a metal plate. The lower end of a concave die of the die is fixed onto a worktable of a press, a back-pressure head is disposed on the lower portion of a cavity of the concave die, the shape of the back-pressure head corresponds to that of a formed part, a blank holder is disposed on the concave die, the upper portion of the blank holder is a feeding barrel for containing solid granular media, and a punch is disposed on the granular media in the feeding barrel. During deep drawing, the metal plate is placed on the upper surface of the concave die, the lower surface of the plate simultaneously contacts with the back-pressure head, bland pressing force is applied to the blank holder, the solid granular media are added into the barrel, the punch moves downwards so that the solid granular media generate forming pressure, back pressure is simultaneously applied to the back-pressure head below the metal plate, the back pressure is lower than the pressure of the punch, and the process is carried out until the plate deforms to have a required forming height; and then the punch and the blank holder return, the back-pressure head is jacked up, and a workpiece is unloaded. The die is simple in structure, the wall thickness difference of the formed part is obviously reduced, the plate part can be deeply drawn at one step, sealing is omitted, pollution is prevented, and the granular media can be recycled.

The invention provides a high-temperature metal hard seal ball valve for granular media. The high-temperature metal hard seal ball valve comprises a valve body, a ball body, a valve rod, a valve seat and a bottom cover, wherein the ball body is arranged in a cavity in the valve body, the valve rod connected with the ball body extends out of the valve body through a center through hole at the upper part of the valve body, the bottom cover is positioned at the bottom of the valve body and comprises a bottom cover baseplate and a bottom cover shaft, the bottom cover baseplate is movably connected with the valve body, the bottom cover shaft penetrates through a through hole at the lower part of the valve body and is connected with the ball body in the cavity of the valve body, the ball body and the valve seat are made of metal materials, the valve seat is mounted in the valve body and on the inner wall which is in contact with the ball body, a spring seat is arranged on the outer side of the valve seat, a disc spring is mounted in a groove between the spring seat and the valve seat, a pressure ring is arranged on the outer side of the spring seat, the pressure ring is fixedly mounted on the spring seat through a screw, a pendant collet for playing a sealing role is arranged in the contact position of the spring seat, the pressure ring and the valve body, an O ring is arranged in the groove between the valve seat and the valve body, and the O ring is made of fluorine rubber.

A novel water flow facilitator for granular filter devices that operate under gravity and contain granular particles, further consisting of plastic pellets that are 2 to 100 times, preferably 5 to 20 times larger than the granular particles; the plastic pellets having an aspect ratio of 0.5 to 10, preferably 1 to 4; that comprise about 1 to 50%, preferably 5 to 15% of the weight of the filter media; that have a specific gravity of 0.5 to 2, preferably 0.9 to 1.5. The plastic pellets should contain antimicrobial agents that protect the granular media from microbiological growth. The plastic pellets are made from any of the following plastics: polyolefins, various kinds of polyacrylates, polyvinyl polymers, nylon, polycarbonates etc. The plastic pellets may contain fillers such as calcium carbonate, titania, silica, or alumina. The invented flow facilitator is utilized in a gravity fed granular filter device to remove contaminants such as chlorine, taste and odor-causing compounds, solvents, pesticides, dissolved organic impurities, dissolved heavy metals and non-metallic impurities such as perchlorates. The invented flow facilitator is utilized in a gravity fed granular filter device in which the media consists of activated carbon, synthetic ion exchange resins, silica, alumina, titania, green sands, iron oxides or mixtures thereof.

The present invention discloses a granular container protector for protecting impulse comprising a plurality of granular media each having a certain elastic property and a certain mass; wherein the plurality of granular media is arranged one-dimensionally into a plurality of sections, each section including one or more granular medium having same elastic property and same mass; wherein the plurality of sections is arranged in a manner that a ratio of mass to elastic property of the granular media in each section decreases toward a central section from both side sections; wherein the plurality of sections is arranged to be a mirror image about the central section; and wherein the side sections and the central section form walls of the granular container protector.

A method for manufacturing a single-element matrix cobalt-based granular media alloy composition formulated as Co_{f<sub2>1</sub2>}-(M_uO_v)_{f<sub2>2</sub2>}, M representing a base metal selected from the group consisting of magnesium (Mg), titanium (Ti), vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), nickel (Ni), copper (Cu), zinc (Zn), aluminum (Al), silicon (Si), yttrium (Y), zirconium (Zr), niobium (Nb), molybdenum (Mo), ruthenium (Ru), indium (In), lanthanum (La), hafnium (Hf), tantalum (Ta), and tungsten (W), u and v representing the number of atoms of base metal M and oxygen (O) per oxide formula, respectively, and f₁ and f₂ being mole fractions represented by the equation f₁+(u+v)f₂=1. The method includes the steps of blending a Co-M master alloy powder and a Co_u′O_v′ powder into a corresponding (Co_aM_1−a)_{f<sub2>1</sub2>′}-(Co_u′O_v′)_{f<sub2>2</sub2>′} formula, and densifying the blended powders.

The invention relates to a high-temperature and high-pressure metal sealing ball valve. The high-temperature and high-pressure metal sealing ball valve comprises a valve body, a valve base, a sphere and a valve rod. Mainly, the potions, on the two sides of a center line of a sphere through hole, of the sphere are each provided with a plane; the planes on the two sides of the sphere are each internally provided with a ball clack; the ball clacks are in movable fit connection with round concave holes in the sphere through round convex columns; annular spring cavities and springs in the cavities are manufactured between the ball clack planes on the radial outer sides of the round convex columns and the sphere planes; annular anti-blocking grooves are manufactured in the portions, on the outer sides of the annular spring cavities, of the sphere planes; medium dredging grooves which lead to the outer surface of the sphere and are communicated with the annular anti-blocking grooves are manufactured in the portions, close to the spring cavities in the outer round faces of the round convex column, of the sphere planes; the valve base is fixedly installed in a valve body channel through a positioning ring; and a concave spherical face, matched with the sphere and the spherical faces of the ball clacks, of a positioning ball clack is manufactured on the positioning ring valve cavity side. The ball clacks of the high-temperature and high-pressure metal sealing ball valve are reliable in floatation, good in temperature resistance and suitable for the high-temperature and high-abrasion working condition of particle media.

A method and an apparatus for treating a liquid containing impurities may include a filtering chamber configured to permit granular media to interact with liquid containing impurities, thereby removing impurities from the liquid to produce filtrate; a filtrate section for receiving the filtrate; a gas supplying system for delivering gas to the granular media in the filtering chamber for transport of a portion of the granular media to a granular media washer; a reject section in fluid communication with the granular media washer for receiving a reject mixture comprising liquid and impurities from the granular media washer; and a control unit that is configured to determine whether the portion of the granular media is being transported properly based on an amount of reject mixture in the reject section.

The invention provides a Ti-Al intermetallic compound laminated composite material tube and a preparation method thereof. The preparation method comprises the steps of with titanium alloy tubular products as an inner tube blank and an outer tube blank, filling a middle interlayer between the inner tube blank and the outer tube blank, welding two end parts of the inner tube blank and the outer tube blank together to seal an annular cavity between the inner tube blank and the outer tube blank, vacuumizing the annular cavity between the inner tube blank and the outer tube blank, placing the inner tube blank, the outer tube blank and the middle interlayer into a mold, fully filling granular mediums into the inner tube blank, and heating the inner tube blank, the outer tube blank, the middle metal interlayer, the mold and the granular mediums to reach a setting temperature to ensure that the middle metal interlayer is at a solid state; and moving a pressing head downwards to extrude the granular mediums to enable the outer tube blank to be attached to the inner wall of the mold, and maintaining the pressure for a certain time period S to enable the contact interfaces between the inner tube blank and the middle metal interlayer and between the outer tube blank and the middle metal interlayer to be subjected to Ti and Al diffusion and reaction, thus generating a Ti-Al intermetallic compound.

The invention discloses a thermal molding method of a high-strength aluminum alloy sheet. The thermal molding method is mainly characterized by comprising the steps of placing a thermal-insulated granular medium into a charging barrel; heating an aluminum alloy sheet to a temperature which is 10-20 DEG C higher than the melting point of an eutecticum; heating an upper blank holder and a lower blank holder of a mold, keeping the temperatures of the upper blank holder and the lower blank holder of the mold consistent with the heating temperature of the aluminum alloy sheet, then, rapidly moving the heated high-temperature sheet into the heated upper blank holder and lower blank holder of the mold, rapidly closing the mold to keep the temperature, and applying a blank holder force by a blank holder slide; loading the thermal-insulated granular medium through a backpressure head; and pressing a cooling male mold to take a combined action with the thermal-insulated granular medium of a soft female mold, and after finishing molding, rapidly transferring a workpiece by clamping to 20-60 DEG C water for quenching treatment. According to the thermal molding method, thermal treatment of the aluminum alloy sheet and a flexible molding technology realized by using the soft female mold are combined by virtue of the characteristic of the thermal-insulated granular medium, and the differential temperature molding process of the sheet is realized through the synergic effect of the cooling male mold, the thermal-insulated granular medium and the high-temperature blank holders, so that the molding property of the sheet can be effectively improved; and the thermal molding method has the characteristics of high molding quality, convenience in realization, low equipment requirement and the like.

The present invention provides a shaft sealing device for high-temperature pressure-proof star-type feeder, which applies mechanical sealing to combine with gas sealing phase, including a rotation shaft 4, high abrasion-proof shaft sleeve 3, a first lip seal 1, a second lip sealing 2 and a body case 5, in pneumatic conveying device of dry granular medium, the invention provided technical scheme can assure to prolong service life of the shaft end sealing device and improve its performance at a certain pressure (0.6 MPa) and temperature (maximum 300DEG).

A method for fabricating vacuum tooling is disclosed using porous granular media. A sheet of steel webbing is affixed to a frame. A plurality of layers of fiberglass is affixed to the webbing. A vacuum port is installed through the webbing and plurality of layers of fiberglass. A granular media is mixed with epoxy to form a granular mixture. The granular mixture is layered over the plurality of layers of fiberglass to form a flat surface and machined for uniformity before sealing.

The invention discloses a reverse drawing method for a soft die with peripheral auxiliary thrust. Reverse drawing equipment for implementing the reverse drawing method mainly comprises a punch, granular media, a blank holder, a plate, a thrust ring, a female die, an ejector rod, a base and the like. When the plate is formed, a preliminarily formed cylindrical part of the plate is fastened on the female die, the blank holder exerts blank holding force, the punch descends to compress the granular media, pressure is applied to the preliminarily formed cylindrical part of the plate, a soft male die can be formed, force is applied to the thrust ring by the ejector rod, and accordingly the peripheral auxiliary thrust can be applied to the cylindrical part; after drawing is completed, a workpiece clings to the inner wall of the female die, and can be finally shaped. Compared with the traditional forming method, the reverse drawing method has the advantages of simple structure, energy conservation, environmental protection and capability of obviously upgrading forming limit on plate parts.