42results about How to "Facilitate flow velocity" patented technology

An expandable venous valve having a support structure that configured to enlarge the area adjacent to the valve structure such that the flow patterns of retrograde flow are modified in a way that facilitates the flushing of the pockets at the base of the valve area to prevent stagnation of bodily fluid, which in the venous system, can lead to thrombus formation. The enlarged pocket areas can be created by forming an artificial sinus adjacent the valve structure in an unsupported section of vessel wall between two support frame section or the support frame can comprise an expanded-diameter intermediate or proximal section that forms an artificial sinus adjacent the valve structure. In another group of embodiments, the attachment pathway between opposing leaflets and the support frame and/or vessel wall comprises a proximal portion that places the leaflets in extended contact with one another and a distal portion forms a large angle with respect to the adjacent walls such that a large pocket is created at the base of the leaflets. In one embodiment, the attachment pathway extends distally along a pair of substantially parallel longitudinal attachment struts to create an extended leaflet contact area, then angles circumferentially and distally from the former along distal attachment struts to define the bottom edge of the leaflets.

A vapor-phase process apparatus and a vapor-phase process method capable of satisfactorily maintaining quality of processes even when different types of processes are performed are obtained. A vapor-phase process apparatus includes a process chamber, gas supply ports serving as a plurality of gas introduction portions, and a gas supply portion (a gas supply member, a pipe, a flow rate control device, a pipe, and a buffer chamber). The process chamber allows flow of a reaction gas therein. The plurality of gas supply ports are formed in a wall surface (upper wall) of the process chamber along a direction of flow of the reaction gas. The gas supply portion can supply a gas into the process chamber at a different flow rate from each of one gas supply port and another gas supply port different from that one gas supply port among the plurality of gas supply ports.

A gas meter with a simple structure for detecting a range from a minute flow rate, such as a gas leak, to the large flow rate of the normal state of use of the gas, while protecting the flow rate sensor from dust and without producing the problem of pressure loss. First, second, and third flow paths for carrying partial flows of a gas to be measured, in accordance with the flow rate, are provided by partitioning, in parallel, the cross-sectional surface of a main flow path. A flow rate sensor for flow rate measurement is provided in the first flow path with a small flow path cross-sectional area, and a flow rate sensor for detecting a gas leak is provided in the second flow path with a small flow path cross-sectional area, where a flow baffling filter is provided on one end side or both ends of the first and second flow paths, and a contaminant (dust) removing filter is provided on one end side or both ends of the first flow path.

An fire-fighting system for arresting a fire in a flammable or combustible liquid storage vessel comprising a portable discharging apparatus and a portable installation apparatus. The portable discharging apparatus receives a fire-fighting agent from a supply hose and applies the fire-fighting agent to arrest a fire in a storage vessel. The portable discharging apparatus can be attached to a distal end of the portable installation apparatus so that the portable discharging apparatus can be mounted on a storage vessel. Furthermore, a plurality of portable discharging apparatuses can be mounted on a single storage vessel, using the same portable installation apparatus, to provide a large amount or a variety of fire-fighting agents or to provide fire-fighting agents at a specific location on the storage vessel. The portable installation apparatus can be extended to a variety of lengths so that it can mount a portable discharging apparatus on a variety differently sized storage vessels.

An assay device includes: a liquid sample zone; a reagent zone downstream and in fluid communication with the sample zone. The reagent zone includes at least two reagent cells containing a reagent material and arranged in the reagent zone such that each reagent cell experiences substantially the same flow conditions of sample from the sample zone. The reagent cells divide the sample flow from the sample zone into multiple flow streams. Also includes are: one or more flow control elements disposed downstream from the reagent zone which combine the multiple flow streams into fewer flow streams; a detection zone in fluid communication with the reagent zone; and a wicking zone in fluid communication with the detection zone having a capacity to receive liquid sample flowing from the detection zone. The sample addition zone, the detection zone and the wicking zone define a fluid flow path.

The invention relates to a method for preventing sand in oil natural gas well, and the formula of relative processing agent, wherein the invention uses fiber to form three-dimension mesh structure, to control the process of discharging sand from storage layer and the formula of processing agent. The invention is characterized in that: first using crack machine and ground tube to extrude pretreatment liquid into storage layer; then using salt water clean liquid to crack; then using fiber composite to process main crack; extruding and completing sand prevention. The invention can eliminate the damage on former oil well storage layer, to improve the leakage condition; and the well eye is filled with fiber composite ring around; the invention can improve yield, realize non-screen sand prevention, and save cost.

When a fuel-cell electric vehicle is running at idle, and a predetermined period of time has elapsed since the vehicle comes into the idle state, forthcoming stopping of an operation of the vehicle is predicted, and the operation mode of a fuel cell is shifted to a residual water reduction mode in which residual water remaining inside the fuel cell is reduced. In the residual water reduction mode, for example, the amount of humidification for air to be supplied to the fuel cell is reduced, so that the air with reduced humidity passes through the fuel cell, to thereby increase the amount of residual water removed by the air. Accordingly, the residual water inside the fuel cell can be reduced before the actual stopping of the operation of the vehicle.

A supercharging system for an internal combustion engine includes an exhaust introduction passage for introducing exhaust gas from an internal combustion engine; an exhaust discharge passage for introducing the exhaust gas from the exhaust introduction passage and exhausting the exhaust gas to an exterior; a mixture part arranged between the exhaust introduction passage and the exhaust discharge passage, for changing internal pressure into negative pressure upon accelerating flowing velocity of the exhaust gas with a narrowed flowing passage set to have a smaller diameter than the exhaust introduction pipe; an absorption passage for mixing outside air and the exhaust gas inside the mixture part upon introducing the outside air with use of negative pressure into an inside of the mixture part; and an intake passage for taking out and returning a part of mixed gas mixed inside the mixture part to a side of the internal combustion engine.

An earth boring apparatus may include an earth-boring cutter head, and a casing secured to the cutter head and extending rearwardly therefrom so that the casing and cutter head are rotatable together as a unit. A casing cuttings passage may extend from adjacent the casing front end to adjacent the casing back end. An entrance opening of the casing cuttings passage, which is adjacent the cutter head, is adapted to allow cuttings to move through the entrance opening into the casing cuttings passage. In some implementations there may be a stationary auger positioned within the casing cuttings passage rearwardly from the entrance opening, such that the stationary auger does not rotate when the casing and cutter head are rotated together as a unit.

A produce washer and method of washing produce or other items in a continuous motion washing machine is provided. The produce washer includes a basket, or other collector, that is positioned within a portion of the fluid flow path and sized and shaped to intercept items from a the fluid flow path while at the same time allowing the fluid to continue to flow through the collector generally in the same circulatory flow path created by the washing machine.

The disclosed apparatus comprises a phase fraction meter and a compliant mandrel deployable within a production pipe, and may further comprise a flow velocity meter. The mandrel allows the determination of the phase fraction for a fluid comprising three phases by providing an additional cross sectional compliance within the conduit, thereby allowing the density of the fluid to be determined. The mandrel also provides a specified blockage through the flow velocity meter, thereby increasing flow velocity through the meter. This allows flow rate measurements in conditions under which flow velocity in the under-restricted cross-sectional area of the pipe would normally be very low. Further, the mandrel can provide a specified restriction in the pipe, i.e., a venturi. By measuring the differential pressure across the venturi and utilizing the measured fluid velocity from the flow velocity meter, the density of the fluid mixture can be calculated. This calculated density can be used in conjunction with other measurements to determine phase fractions or to double check or to calibrate the phase fraction meter. The mandrel can be deployed without removing the meter from the conduit, allowing for easy adaptation to changing flow parameters and fluid compositions.

A lateral duct 15 for interconnecting a riser 1 and a cyclone separator 2 has an introduction portion 16 at the connection with the riser 1 which has a cross-sectional area equal to that of the riser 1, and a throttled portion 17 between the introduction portion 16 and the cyclone separator 2 which has cross-sectional areas gradually reduced from the introduction portion 16 to the cyclone separator 2 so as to increase a flow velocity of combustion gas.

A wet processing apparatus holds on a stage a substrate to be processed and carries out a wet treatment by rotating the stage. The substrate is held by the stage, with the center of the substrate being offset from the rotation center of the stage, using a Bernoulli chuck which causes an inert gas to flow to a back surface of the substrate, so that the substrate is eccentrically rotated along with the rotation of the stage. A first gas supply passage which is used for the Bernoulli chuck is provided at a rotation shaft portion in the stage and the stage is also provided with second gas supply passages which communicate with the first gas supply passage to thereby introduce the inert gas to the back surface of the substrate. The second gas supply passages are axisymmetric with respect to a central axis of the substrate.

Provided is an air blowing device capable of keeping an air outlet invisible to the extent possible without impairing a function as the air blowing device. An air blowing device (10) includes: a tubular body (21) defining an airflow passage (21a) and an air outlet (21b); a guide wall (31) for guiding an airflow having passed through the air outlet in an intended direction; and a flow velocity adjusting mechanism (valve body) (22) capable of adjusting a flow velocity of the airflow passing through the air outlet. The guide wall has a convex surface shape protruding in a direction intersecting with a forward direction of the air outlet, and is arranged so that a projection image, which is obtained by projecting the guide wall onto an imaginary plane including the air outlet, covers the entire air outlet. The flow velocity adjusting mechanism is configured to adjust the flow velocity in accordance with the intended direction.

A system and method for draining remaining water in a gas passage of a fuel cell, which has a simple structure and the remaining can be efficiently and reliably drained outside. Water which remains in a gas passage of the fuel cell is first drained by increasing the flow rate of the reaction gas while the operation of the fuel cell is stopped. The remaining water which has not been drained is then drained by increasing the pressure of the reaction gas and then decreasing the increased pressure. The increase and decrease operation of the pressure of the reaction gas is started after the increase of the flow rate of the reaction gas is started. Typically, the increase of the pressure of the reaction gas is started when a predetermined time has elapsed after the increase of the flow rate of the reaction gas is started.

The invention discloses a heavy-duty sliding bearing, which comprises a bearing seat and a bearing body, wherein the bearing body is a ring consisting of a plurality of arc-shaped pads and is assembled in the bearing seat; the front of each arc-shaped pad is matched with a supported shaft, the back of each arc-shaped pad is matched with the bearing seat, and two lateral surfaces of each arc-shaped pad are matched surfaces of the adjacent pads; and the bearing is provided with a forced circulating lubrication oil passage, and the oil passage passes through the fronts and the backs of the pads. The heavy-duty sliding bearing is characterized in that: a plurality of radial heat dissipation grooves are respectively formed on the crossing angle parts of the back and the two lateral surfaces of each arc-shaped pad, and the heat dissipation grooves are connected in series to the forced circulating lubrication oil passage of the bearing. The structure is particularly suitable for a tilting pad bearing, swinging of the tilting pads is not affected, and the rigidity of the tilting pads is not reduced; and the friction heat of the bearing is taken away by using the lubricating medium of the bearing, so that the aim of reducing the temperature of the pads is fulfilled.

Methods and systems are provided for a particulate matter (PM) sensor assembly positioned downstream of a diesel particulate filter in an exhaust system. In one example, a PM sensor assembly may include a bent tube having a first, upstream end coupled to an exhaust passage, and a second outwardly flared end at a downstream end of the assembly. In this way, the second end of the bent tube may form a venturi that serves to block larger particulates from entering the assembly, and additionally serves to increase exhaust flow into the sensor assembly.

A manufacture method of briquette for use as metal stock is provided which increases the efficiency of drying porous masses so as to shorten a drying time, and which provides a simplified constitution for reducing an installation area of a system and for reducing the running cost and initial cost of the system. The porous masses are formed by compression molding a recyclable material containing metallic powder. The compression molded porous masses are fed into a tubular member, into which hot air is blown for drying the porous masses.

An apparatus for cleaning and cooling a liquor nozzle, the nozzle including at least a liquor tube for feeding liquor and chemicals into a furnace of a recovery boiler. The apparatus includes an outer casing tube, which defines a space whereto conduits are provided for introducing water and steam to generate an emulsion or a conduit for introducing emulsion generated by the water and steam and the surface of which is provided with openings, such as pores or holes, for discharging the emulsion formed by water and steam through the outer casing.

A turbocharger structure for a vehicle includes a turbine turned by exhaust gas; a first scroll communicating with an exhaust port of an engine block so as to allow the exhaust gas to flow therein, the first scroll surrounding the turbine by extending along a circumferential direction of the turbine and being provided with an opening at an end thereof for discharging exhaust gas to the turbine; and a second scroll communicating with an exhaust port of the engine block so as to allow exhaust gas to flow therein, the second scroll surrounding the turbine, along with the first scroll by extending along the circumferential direction of the turbine, and being provided with an opening at an end thereof for discharging exhaust gas to the turbine, wherein the ends of the first scroll and the second scroll having the respective openings are disposed at different locations on a circumference of the turbine.

The invention discloses a dust removing device of a protective self-propelled straw granulator. The dust removing device comprises a straw channel, and the head end of the straw channel communicates with a cutting device of the protective self-propelled straw granulator. The tail end of the straw channel is inclined upwards and communicates with the inner wall of the top of a diffusion area. The bottom inner wall of the diffusion area communicates with one end of a gravity slope, and the other end of the gravity slope communicates with a straw granulator feeding port of the protective self-propelled straw granulator. The bottom of the diffusion area communicates with the top end of a deceleration area through a dust removing filtering screen, and the bottom end of the deceleration area communicates with a dust discharging channel. According to the dust removing device, based on the gravity sedimentation theory, the incoming speed of straw is reduced through the diffusion area, and thestraw passes through a gravity channel and slides into the feeding port through mass differences and the gravity action; and raising dust low in mass and small in particle passes through the dust removing filtering screen, enters the deceleration area, and is discharged to the ground.

The invention discloses a tundish flow control system capable of filtering inclusions in steel, which comprises a tundish. The space in the tundish is divided into an impact area located in the middleand two pouring areas located beside the impact area through two retaining walls, wherein the molten steel is introduced into the impact area through the pouring long nozzle, a turbulence suppressoris arranged under the pouring long nozzle, a plurality of flow guide grooves are formed in each retaining wall to communicate the impact area with the pouring areas, a water outlet is formed in the bottom of the pouring area, the multiple flow guide grooves are sequentially distributed in the height direction of the retaining wall, and each flow guide groove extends in the width direction of the retaining wall. According to the tundish flow control system capable of filtering inclusions in steel disclosed in the invention, inclusions in steel can be filtered out, the inclusions in molten steelare promoted to fully float upwards to be discharged, blockage is not prone to occurring, the flowing state and speed distribution of the molten steel in the tundish can be improved, the temperaturedifference of a water outlet area is reduced, finally, molten steel in the tundish is purified, and the casting blank quality is improved.

The invention discloses oxygen-controlled 300-400 DEG C stainless-steel-compatible liquid metal in the photothermal field and a process thereof. The alloy compositions include, by weight percent, 1.0-3.0% of In, 10.0-15.0% of Bi, 2.0-3.0% of Mn, 20.0-30.0% of Zn, 10.0-12.0% of Cd, 2.0-5.0% of Pb, 2.0-4.0% of Ga and the balance being Sn, wherein oxygen activity controlled oxide compositions include, by weight, 10.0-20.0% of PbO, 5.0-8.0% of AgO, 2.0-5.0% of Mn, 10.0-20.0% of MgO, 3.0-5.0% of CoO and the balance being Fe2O3. The liquid metal is used in a heat colleting module and a heat transfermodule of a solar photothermal system, an oxygen control module is adopted for controlling the oxygen activity effectively, and a compact layer of oxide film can be formed on the surface of a stainless steel pipeline so as to inhibit erosion of the liquid metal to the pipeline material; and the process is simple, and besides, the effects for improving heat transfer and prolonging the service lifeare quite obvious.

The purpose of the present invention is to provide: silica particles of which the maximum particle diameter can be minimized and which can achieve proper fluidability that cannot be achieved by the conventional techniques; and silica spherical particles which, when used as a filler for a heat-dissipating sheet, can achieve excellent heat conductivity and flexibility. Silica spherical particles characterized in that, when particles each having a size of 5 μm or more and imaged by an optical measurement are observed, the particle diameter of each of the particles, which is determined from the image, satisfies the following requirements. Requirements: D99≤29 μm, and 10 μm≤Dmode<D99, and D99/Dmode≤1.5, and Dmode≤20 μm.

The invention provides an automobile hydraulic cylinder with a self-locking function, belongs to the technical field of hydraulic transmission equipment, and solves the problems that self-locking of an existing hydraulic cylinder is mainly realized by means of blocking pressure oil, however, hydraulic oil is easy to leak in the locking mode, and a negative pressure effect and a soft leg phenomenon occur after the hydraulic oil leaks. According to the technical scheme, the hydraulic cylinder comprises a hydraulic cylinder barrel, the hydraulic cylinder barrel is provided with a cylinder cover and a rear cylinder cover, the rear cylinder cover is provided with a first self-locking structure, the first self-locking structure is provided with a piston, the piston is provided with a cylinder rod, the cylinder rod and the rear cylinder cover are provided with a connecting base, and the hydraulic cylinder barrel is provided with an upper oil pipe and a lower oil pipe. The self-locking hydraulic cylinder has the beneficial effects that self-locking of the cylinder rod is achieved, hydraulic oil leakage can be avoided, and the negative pressure effect and the soft leg phenomenon are avoided.