344results about How to "Uniform expansion" patented technology

A catheter with at least one centering device attached near a distal end of the catheter. The centering device has at least two struts extending between a proximal end and a distal end. The centering device has a variable diameter and tends to center the distal end of the catheter, steering the catheter away from the vessel wall during insertion through the vasculature and toward the treatment site. The centering catheter may facilitate access to tortuous anatomy by preventing the catheter tip from catching on irregularities in the lumenal surface. The centering catheter may also facilitate uniform stent expansion by stabilizing the catheter during stent deployment.

A structural reinforcement for a hollow member comprising a rigid reinforcing member having a shape that substantially conforms to the cross section of the hollow member to be reinforced with an expandable adhesive material over at least a portion of the surface of the structural reinforcement having one or more extensions on its external surface which control and direct the direction in which the adhesive material expands to bond the reinforcing member to the internal surface of the hollow member, some of the extensions also provide improved reinforcement.

The invention provides a technology for processing tobacco stalk into shreds, and belongs to the technical field of tobacco processing. The technology disclosed by the invention has the following steps of: pretreating tobacco stalk, expanding the tobacco stalk with microwave, washing the tobacco with water, storing the tobacco stalk, straightening out the tobacco stalk, slicing the tobacco stalk, charging and storing stalk slices, shredding the stalk slices, drying and shaping the stalk shreds, and perfuming the stalk shreds and storing the stalk shreds. Equipment used in the technology is purchased from the market, wherein the equipment which is purchased from the market, adopts a low-frequency (915MHz) high-power (more than 10kW) microwave magnetron, and transports the tobacco stalk by a belt is improved into equipment which adopts an ultrahigh-frequency (2450MHz) single-pipe low-power (1.5kW) microwave magnetron, performs group control on the microwave magnetron and transports tobacco stalk by a drum. The technology has the characteristics that the tobacco stalk shreds are good in quality consistency and more similar to tobacco leaf shreds in the physical property, and have high sensory quality and filling value; and uniformity, stability and mixing proportion of the tobacco stalk shreds are improved when the tobacco stalk shreds are mixed with the tobacco leaf shreds, the quality of cigarette is improved, the application range and use ratio of the tobacco stalk shreds in the cigarette are improved, and the aims of tar reducing, harm reducing, cost reducing and efficacy enhancing are achieved.

The invention discloses an up-flow reactor, which comprises an initial distributor positioned at the bottom of the reactor and an intermediate distributor above the initial distributor. The initial distributor consists of a conical traverse baffle and a sieve plate positioned above the conical traverse baffle; and the intermediate distributor consists of an open pore sieve plate and a sieve plate string structure. The up-flow reactor provided by the invention can realize even distribution of gas in the reactor in short distance so as to improve the utilization rate of a catalyst and increase the space of a catalyst bed layer in the reactor. The up-flow reactor of the invention is particularly applied to a hydrogenation process of heavy oil (comprising wax oil, residual oil, coal liquefied oil and the like).

The invention discloses circulating fluidized bed advanced treatment equipment for industrial wastewater. The equipment comprises a tank body for the Fenton oxidation reaction of wastewater, wherein the tank body is divided into a circulating water distribution zone, a FeOOH crystallization zone and a gas-water separation zone from bottom to top in turn; the circulating water distribution zone is provided with a water distributor and a circulating water inlet; the circulating water inlet is connected with the output ends of a FeSO4 dosing pump, a H2O2 dosing pump and a circulating pump simultaneously; the FeOOH crystallization zone is provided with a crystal bed layer, a solid discharge pipe and a circulating water outlet; the circulating water outlet is connected with the input end of the circulating pump; the gas-water separation zone is provided with a gas-water separation barrel, a wastewater input pipe extending to the gas-water separation barrel, a gas discharge pipe, an annular effluent weir and a purified water discharge pipe; and the wastewater input pipe is connected with the output end of an influent pump. The equipment has the characteristics of low operating cost, low sludge yield and good treatment effect, is flexibly and conveniently operated, and is particularly suitable for the industrial wastewater containing non-degradable organic matters.

The invention discloses a tobacco stem pressing and shredding technology and belongs to the technical field of tobacco processing. The technology comprises the steps of conducting high-temperature high-pressure and decompression preprocessing on tobacco stems, conducting microwave expansion on tobacco stems, humidifying and storing tobacco stems, heating and humidifying tobacco stems, pre-pressing tobacco stems, conducting secondary stem pressing, conducting ternary stem pressing, feeding stems, shredding stems, shaping and drying stem shreds, and perfuming and storing stem shreds. The technology has the advantages that the quality consistency of stem shreds is good, the physical property of stem shreds is closer to that of leaf shreds, organoleptic quality and padding value are high, the uniformity, stability and blending ratio of stem shreds blended with leaf shreds are improved, cigarette quality is improved, the application range and utilization rate of stem shreds in cigarettes are increased, and tar reduction, harm reduction, cost reduction and benefit increasing are realized.

A method of friction welding a head part to a skirt part of a piston having a hollow cooling duct in which the internal connection surface of the first part to be welded is reciprocally arranged with an internal connection surface of the second part to be friction welded, so that they form a unsymmetrical contact area, so that the resulting weld of the first and the second parts produces a weld bead that is located predominantly outside of the hollow cooling duct. The unsymmetrical contact area can be formed by chamfered, angled edge surfaces that produce, for example, a wedge-shaped space, or partially matched, inter-fitting surfaces that remain out of contact and produce a gap at sides facing the hollow space.

The invention provides a cuff for a blood pressure monitor which is wound around a measurement site of the living body, and includes an air bag having an inflated / deflated space formed therein by melting and bonding rims of an outer wall portion and an inner wall portion together. The air bag contains a band-shaped connecting portion, which has ends respectively attached to one end and the other end of the air bag in its winding direction around the living body, so as to extend substantially continuously from the one end to the other end of the air bag. The band-shaped connecting portion is arranged inside the inflated / deflated space of the air bag. With this configuration, a cuff for a blood pressure monitor permitting uniform inflation of the air bag over the entire region when the pressurized air is introduced therein is obtained.

A method of friction welding a head part to a skirt part of a piston having a hollow cooling duct in which the internal connection surface of the first part to be welded is reciprocally arranged with an internal connection surface of the second part to be friction welded, so that they form a unsymmetrical contact area, so that the resulting weld of the first and the second parts produces a weld bead that is located predominantly outside of the hollow cooling duct. The unsymmetrical contact area can be formed by chamfered, angled edge surfaces that produce, for example, a wedge-shaped space, or partially matched, inter-fitting surfaces that remain out of contact and produce a gap at sides facing the hollow space.

A fungal growth structure comprising a nutritive vehicle, a porous material, an administrable space. fungal tissue comprising fungal hyphae having a growth pattern, the fungal tissue connecting said nutritive vehicle to said porous material to said administrable space, wherein the fungal tissue within said space defines at least one successive fungal material layer; and a chemically or physically altered separated portion of fungal material, the separated portion separated from said fungal tissue.

The invention discloses a water-swelling rubber composite material. The rubber composite material is formed from the following components in parts by weight: 100 parts of rubber, 30-100 parts of super adsorbent resin, 2-10 parts of metal ion sealing agent, 0.5-2.5 parts of solid softening agent, 0.5-3.5 parts of coloring agent, 1-7 parts of anti-aging agent, 1-7 parts of accelerant, 1-8 parts of zinc oxide, 5-45 parts of reinforcing agent, 5-20 parts of plasticizer, 0.1-2.6 parts of vulcanizing agent, and 5-45 parts of mixture of PEG (polyethylene glycol) and MDI (diphenylmethane diisocyanate) at a molar ratio of 1:1. The invention further provides a preparation of the rubber composite material, in particular provides an application of the rubber composite material as superfine rubber swelling particles in a large pore path or high-permeability belt of a reservoir deep strata for profile control and water shutoff of an oil-water well.