61 results about "Liquid velocity" patented technology

A planar velocity measurement system (100) is operative to measure all three velocity components of a flowing fluid (106) across an illuminated plane (108) using only a single line of sight. The fluid flow is seeded with small particles which accurately follow the flow field fluctuations. The seeded flow field is illuminated with pulsed laser light source (102) and the positions of the particles in the flow are recorded on CCD cameras (122,124). The in-plane velocities are measured by determining the in-plane particle displacements. The out-of-plane velocity component is determined by measuring the Doppler shift of the light scattered by the particles. Both gas and liquid velocities can be measured, as well as two-phase flows.

The invention provides a manufacturing method of a diamond wire for efficiently cutting a silicon slice. The manufacturing method comprises the following steps: (1) discharging the wire and removing impurities; (2) cleaning; (3) performing surface pretreatment; (4) preplating; (5) polishing; (6) plating for the second time; (7) cleaning, drying and collecting the wire. By using the manufacturing method, the facts that the density of diamond particles on the diamond wire is 200 to 350 particles / mm and the protrusion height is 5 to 6 [mu]m can be guaranteed through adjustment on the current distribution of electroplating liquid, pH value, viscosity and liquid velocity, control on the operating speed of a bus and a unique additive adding mode; furthermore, the diamond particles are dispersed on the bus uniformly, the adhesive force is stable and the agglomeration phenomenon is avoided. The diamond wire manufactured by the method can efficiently cut crystal silicon rods of 8.0 inch, 8.2 inch and 8.4 inch and with the length being 650 to 700 mm within 2 hours, the conventional cutting time is shortened by half, bad surfaces and edges of the silicon slice are reduced, and the production efficiency is effectively improved.

A transient liquid pressure power generation system and associated devices and methods are disclosed. The system can include a liquid source and a transient pressure drive device fluidly coupled to the liquid source to receive liquid from the liquid source. The transient pressure drive device can include a drive component, and a valve to cause a high pressure transient wave in the liquid traveling toward the liquid source to operate the drive component. The system can also include a liquid velocity continuation component downstream of the transient pressure drive device and a bypass conduit fluidly coupled to the liquid source and the liquid velocity continuation component. Additionally, the system can include a heat source fluidly coupled to the transient pressure drive device and the liquid source to receive liquid from the transient pressure drive device and heat liquid returning to the liquid source. The liquid velocity continuation component can operate to maintain continuous liquid flow from the liquid source to the heat source from the transient pressure drive device or the bypass conduit to cause substantially immediate maximum liquid flow velocity from the transient pressure drive device upon opening the valve.

In one embodiment, a method for drilling a wellbore includes injecting drilling fluid through a drill string disposed in the wellbore and rotating a drill bit disposed on a bottom of the drill string. The drilling fluid includes a liquid and a gas. The drilling fluid is injected at the surface. The drilling fluid exits the drill bit and carries cuttings from the drill bit. The drilling fluid and cuttings (returns) flow to the surface via an annulus formed between the drill string and the wellbore. The liquid is injected at a rate so that a liquid velocity of the returns in the annulus is sufficient to transport the cuttings. The method further includes drilling through at least a portion of a non-productive formation.

A dispensing container fillable with a liquid includes a squeezable reservoir for holding the liquid prior to dispensing, a dispensing outlet for expending the liquid, and a flow control system for regulating the velocity of the liquid exiting the outlet when a squeezing pressure is applied to the liquid-holding reservoir.

The invention relates to a method for enhancement of ozone oxidation degradation of pentachlorophenol in a micro channel, and belongs to the water treatment technology field and the novel high-efficiency chemical equipment field. The method is mainly characterized in that an inlet is T-shaped or Y-shaped, an internal cross section of a main channel is rectangular in shape, and oxidative degradation of a POPs typical pollutant PCP is carried out by utilizing O3 in a square or circular micro channel reactor. When the initial concentration range of the substrate is 5-150 mg.L<-1>, under experimental conditions that the ranges of the superficial gas velocity, the superficial liquid velocity, the reaction temperature, the reaction pressure, and the ozone adding amount (according to the molar concentration ratio of ozone to the substrate) are respectively 0.10-12.00 m / s, 0.050-2.00 m / s, 0.1-1.0 MPa, 15-30 DEG C and 1.2-4.0, the reaction system enables the removal rate of the substrate PCP to reach as high as 90%-100%.

The invention relates to an airlift-jet multi-stage loop reactor, which is characterized in that the reactor comprises a tower body, the bottom of the tower body is provided with a tower-bottom gas distributor, the inside of the tower body is provided with a guide cylinder divided into a plurality of segments, and a jet distributor is arranged in a clearance between each two adjacent segments of the guide cylinder; and the outside of the tower body is provided with a liquid pump and a gas compressor, one end of the liquid pump is connected with a liquid source by a pipe, and the other end of the liquid pump is connected with the jet distributor by a pipe, one end of the gas compressor is connected with a gas source by a gas input pipe, and the other end of the gas compressor is respectively correspondingly connected with the jet distributor and the tower-bottom gas distributor by two gas output pipes. By using the airlift-jet multi-stage loop reactor disclosed by the invention, the fluid is driven to carry out circulatory flow along the guide cylinder under the action of airlift and jet, therefore, the loop driving force and the local disturbance are increased, so that the mass transfer coefficient and the mass transfer specific surface area are significantly increased, and to the high-viscosity fluid, a high loop liquid velocity and a good mass transfer effect still can be obtained, therefore, the airlift-jet multi-stage loop reactor disclosed by the invention has a broad application prospect in gas-liquid two-phase or gas-liquid-solid three-phase chemical and biological reaction fields.

The invention provides a gas-liquid mixed self-suction type centrifugal pump. A pump body with axial liquid returning is adopted. After the pump is started, a impeller rotates, the liquid stored in asuction chamber and the air in a suction pipeline are added together and are completely mixed in the impeller, under the action of centrifugal force, the pressure of a front end is reduced, a flap valve is opened by the impact force of water, the liquid enters, and meanwhile, the liquid in the impeller is entrained with gas to flow towards the outer edge of a volute chamber, a white foam belt witha certain thickness and an adjustable rotating liquid ring are formed on the outer edge of the impeller, the gas-liquid mixed body enters a gas-liquid separating chamber through the pump body, and atthe moment, due to the fact that the liquid velocity is suddenly reduced, lighter gas is separated from the mixed solution, the gas is continuously discharged upwards through a discharging outlet ofthe pump body, and the degassed liquid returns to a liquid storing chamber, and enters the impeller again through a liquid returning hole, and then is mixed with the gas sucked in the suction pipelinefrom the inside of the impeller again, and flows to the outer edge of the impeller under the action of the impeller rotating at a high speed. The process runs in cycle, the self-suction process is completed until the gas is completely sucked up.

The invention discloses a super-gravity ammonia removal device, comprising a box body, an explosion-proof motor, a liquid circulation loop and a gas circulation loop. The super-gravity ammonia removaldevice provided by the invention utilizes a strong centrifugal force generated by high-speed rotation to enlarge a contact area by means of a liquid film formed by a plastic net, so that gas-liquid relative movement speed is increased, an interphase contact boundary area is greatly increased and is rapidly updated, the mass transfer efficiency of the device is 1 to 3 orders of magnitude greater than that of spray tower equipment, and ammonia gas can be more fully dissolved in water accordingly. The water is recycled, so that the energy consumption of the water is reduced, and the recycling rate of ammonia is increased; furthermore, the super-gravity ammonia removal device has the characteristics of small volume, simple structure, short retention time, uniform micromixing, high mass transfer efficiency and low investment and operating costs. The invention also discloses an ammonia removal method of the super-gravity ammonia removal device.

A liquid micro-flow detection method comprises the following steps: S1, obtaining a function relation V(P) between pressure P and velocity V of liquid at liquid outlet of a storage container; S1.1, sampling the pressures of the liquid at the liquid outlet at different liquid levels, measuring the accumulated flow M1 of the liquid in a time period T when sampling is carried out under all pressure values, so as to calculate the liquid velocity V, M1 / T, under the corresponding sampling pressure value and build a data set of pressure-velocity of sampling liquid of each time; S1.2, based on the pressure-flow velocity data set obtained in the S1, assuming the order of an approximating function, and calculating the coefficient of the approximating function corresponding to the order through a least squares method, so as to obtain the function relation V (P) between the pressure and velocity of the liquid; and S2, integrating the function relation V(P) to calculate the flow M in a certain period. According to the invention, with the function relation between the pressure and velocity of the liquid at the liquid outlet, the overall flow in a certain time can be monitored as long as the pressure of the liquid outlet is monitored, and the method can be used for the measurement of the liquid with the velocity below 800 L / h.

The invention relates to a device and method for measuring the thickness of the inner ring film in the wellbore of a vortex drainage and gas extraction tool. The measuring device for measuring the thickness of the inner ring film in the wellbore of a vortex drainage and gas extraction tool comprises a multi-phase flow device, an ultrasonic doppler velocimeter and a vortex tool, the multi-phase flow device includes a gas distribution line, a liquid distribution line, a guide rail, a crane mechanism, a manual winch, a plexiglass pipe measuring mechanism, an electronic control device, a computerand an air compressor connected to a mixer through gas distribution line, and a water tank is connected to the mixer through a pump and the liquid distribution line, and the mixer is connected with the corresponding plexiglass pipe through a pipeline, the pipeline is provided with an electric valve, one of the plexiglass pipe is provided with the vortex tool, the plexiglass pipe is mounted on themobile support; the ultrasonic doppler velocimeter is used to measure the thickness and liquid velocity of the ring film. The device can measure the thickness of the inner ring film and the velocity of liquid phase in the wellbore after vortex tool under different well angles and different gas-liquid ratio conditions.

The invention discloses a buffer type supporting device for large-scale equipment, which comprises a main hollow shell, the main hollow shell is provided with a main limiting space inside, and the main hollow shell is provided with a main hollow structure at the top of the main limiting space. The side of the hollow casing is provided with a main liquid inlet pipe which is integrated with it, and a main liquid inlet hole is arranged inside the main liquid inlet pipe. The invention utilizes the buffering capacity of the coil spring and the liquid to act together, and at the same time utilizes the buffering capacity formed by the air flow to control the ability of the parts to reset. The speed of reset under the action of liquid and coil spring reduces the negative impact caused by too fast reset speed. In addition, the device has a threaded coil spring elastic control mechanism, which can effectively control the buffer capacity that the coil spring and liquid can withstand, so that Adjust its own cushioning performance according to the gravity of the placed object.

The invention discloses an isometric spiral multipoint ultraviolet spectrum cryopreserved serum analyzer. The analyzer is composed of a machine body and internal components arranged in the machine body, wherein the internal components mainly include a Raspberry Pi, an ultraviolet raman laser, an ultraviolet raman probe, a spectrograph, a sample chamber, a direct-current stabilized power supply, atouch screen, a liquid nitrogen pump, a liquid nitrogen bottle, an electric controlling and moving assembly and an auxiliary component. The isometric spiral multipoint ultraviolet spectrum cryopreserved serum analyzer disclosed by the invention has the advantages that a mode that the flow is controlled by an electric valve and the liquid velocity is controlled by the liquid nitrogen pump is utilized, and low-temperature and constant-temperature control in an inner cavity is achieved; thus, test environment uniformity is ensured, and test repeatability is ensured; for a cryopreserved serum sample test, constant-low-temperature isometric spiral multipoint ultraviolet raman fluorescence spectra collection is performed, principal component analysis is performed on spectrum mean vectors and spectrum variance vectors, contingency and deviation of a single-point test are eliminated, and recognition rates of different species of serums can be effectively improved.

The invention provides a fuel charge monitoring device and a control method thereof. The monitoring device comprises a fuel storage cavity, a first fuel inlet pipe, a pressure sensor, a liquid speed sensor and a control unit. The first fuel inlet pipe is connected with the bottom of the fuel storage cavity, the section area of the first fuel inlet pipe is smaller than that of a gas station oil gun, and the bottom of the first fuel inlet pipe is connected with the top of a fuel tank. The pressure sensor and the liquid speed sensor are both fixed on the lateral wall of the first fuel inlet pipe and connected with the control unit. The control unit calculates fuel charge. According to the fuel pressure detected by the pressure sensor and fuel flow speed detected by the liquid speed sensor, starting moment and stopping moment of the fuel charge are determined and calculated, and the fuel charge is calculated. The fuel charge can be monitored when a vehicle is refueled, drivers can check the actual fuel charge and compare the actual fuel charge with required fuel charge, fuel charge shortage in a refueling process is effectively prevented, and vital interests of customers are guaranteed.

The invention discloses a plasma storage bag special for plasma exchange, absorption, and filtration treatment. The plasma storage bag comprises a plasma storage bag body and auxiliary connecting pipelines. The plasma storage bag body comprises an outer bag and an inner bag, and inner and outer cavities are connected with each other through a one-way valve composed of a double-layered membrane. A separated-plasma inlet communicated with the outer cavity and a purified-plasma inlet communicated with the inner cavity are reserved at the top of the plasma storage bag. A backflow-plasma outlet served as an outflow outlet for the inner cavity and a purified-plasma outlet served as an outflow outlet for the outer cavity are reserved at the bottom of the plasma storage bag. By the arrangement, the problem that extracorporeal circulation capacity jointed by complex treatment is larger is solved, and treatment is safer and more convenient; and by design of the inner and outer cavities and a structure of liquid velocity difference in operation, plasma of a patient with liver failure goes through multiple times of extracorporeal absorption and filtration purifying circulations, efficient circulation passages can be formed, inefficient circulations can be avoided, and better treatment effect can be exerted.

The invention relates to a tower diameter reducing structure and a bubble tower with the same. According to the measuring result of liquid velocity distribution and stopping time distribution, the bubble tower provided with 4 diameter reducing parts with internal diameter of 12 cm can lower the back mixing degree by 60 percent, while the bubble tower provided with 4 diameter reducing parts with internal diameter of 23 cm can only lower the back mixing degree by 20-30 percent. The invention effectively overcomes the phenomenon of the liquid back mixing in the bubble tower without installing an internal part for interfering the flow of the liquid in the tower, ensures sufficient air-liquid mixing while lowering the back mixing of the whole tower, has the characteristic of reliable operation and is suitable for various reaction systems such as an air-liquid reaction system and an air-liquid-solid reaction system.

A flowing electrolyte fuel cell system design (DHCFC-Flow) is provided. The use of a flowing oxygen-saturated electrolyte in a fuel cell offers a significant enhancement in the cell performance characteristics. The mass transfer and reaction kinetics of the superoxide / peroxide / oxide ion (mobile oxygen ion species) in the fuel cell are enhanced by recirculating an oxidizing gas-saturated electrolyte. Recirculating oxygen-saturated electrolyte through a liquid channel enhances the maximal current observed in a fuel cell. The use of a oxygen saturated electrolyte ensures that the reaction kinetics of the oxygen reduction reaction are fast and the use of convection ameliorates concentration gradients and the diffusion-limited maximum current density. The superoxide ion is generated in situ by the reduction of the oxygen dissolved in the gaseous electrolyte. Also, a dual porosity membrane allows the uniform flow of fuel (e.g., methane) on the fuel side, without allowing phase mixing. The capillary pressure for liquid intrusion into the gas phase and vice versa is quite large, estimated to be 1-10 psi. This makes it easier to control the fluctuations in gas / liquid velocity which might otherwise lead to phase mixing and the loss of fuel cell performance. In one variation, a dual-porosity membrane structure is incorporated in the system to allow uniform flow of fuel and prevent mixing of fuel with a liquid electrolyte.

The invention relates to a vision-based online measurement method for liquid viscosity. The method mainly comprises the steps that an optical flow method is used to calculate a velocity field and liquid viscosity is calculated according to the velocity field. Firstly, a camera is used to collect a fluid image sequence or video at a fixed time interval, and then an optical flow field is calculatedthrough an optical flow technique. A liquid velocity field is calculated according to an object and image proportional relationship. Finally, liquid viscosity is calculated according to the Newtonianfluid formula or a look-up table method. The method provided by the invention can measure liquid viscosity in real time in a non-contact online manner, and monitors the liquid viscosity information ina device without affecting the normal operation of the device in real time.

The invention discloses a method for analyzing cryopreserved whole blood by using constant-low-temperature supercontinuum integrated spectroscopy. The method is implemented on an analyzing instrumentfor cryopreserved whole blood. The method comprises the following four steps: realization of constant low temperature of an integrating sphere; initial calibration; constant-low-temperature supercontinuum integrated spectrum acquisition; and test result analysis. The method can be used in customs for detection, identification, database building, tracing and protection of cryopreserved whole blood.The invention has the beneficial effects that constant low temperature control of an inner cavity is realized by controlling flow via an electrically-operated valve and controlling liquid velocity via a liquid nitrogen pump, so the uniformity of a testing environment is guaranteed; thus, the repeatability and consistency of supercontinuum transmittance spectra testing of cryopreserved whole bloodsamples are improved, and deviation caused by heating of samples in conventional processes can be eliminated, so the recognition rate of whole blood of different species can be effectively improved.

The invention discloses a liquid velocity controllable valve for a liquid hydrogen storage tank. The liquid velocity controllable valve for the liquid hydrogen storage tank comprises a valve body; a first liquid inlet is formed in the left side face of the valve body; a first liquid outlet is formed in the right side face of the valve body; a flange is fixedly connected to the top of the valve body; a valve element is fixedly installed in the flange in an embedded mode; a first valve rod is installed in the valve element in an embedded mode; the lower end of the first valve rod is inserted inthe valve body; a liquid barrier ball is fixedly installed on the lower surface of the first valve rod and provided with a spherical through hole; a sealing ring is fixedly installed at the position,at the upper end of the liquid barrier ball, of the first valve rod; and a first velocity control hand shank is fixedly installed on the top of the first valve rod. According to the liquid velocity controllable valve for the liquid hydrogen storage tank, the speed of liquid hydrogen flowing through the valve can be controlled through a second velocity control hand shank, a second valve rod and a velocity control baffle, workers can use the valve conveniently, the liquid hydrogen can be effectively prevented from flowing back by means of a backflow prevention pipe during adjustment of the liquid hydrogen velocity, and thus the valve has higher practicability.

Embodiments of the present disclosure provide processes and systems for the epoxidation of an olefin using a fixed bed reactor. The fixed bed reactor is maintained at a temperature from 0 to 40 degrees Celsius. The processes and systems regulate a superficial liquid velocity of a non-homogeneous reaction mixture and recycled portion of effluent of the fixed bed reactor.

The invention discloses a method for detecting a gas-liquid dispersion state in a jet flow bubbling reactor based on liquid velocity fluctuation. The method comprises the following steps: measuring liquid velocity on the wall surface of the reactor; and determining the gas-liquid dispersion state in the reactor as well as critical Reynolds numbers Rejf in gas flooding and carrier gas states, and critical Reynolds numbers Rejcd in carrier gas and complete dispersion states according to change rules of time-average Vave or standard deviation STDv of a liquid velocity signal along with liquid Reynolds numbers.

The invention discloses a vein transfusion device regulating valve with a nonlinear compensation. The vein transfusion device regulating valve with the nonlinear compensation comprises a lead screw, a nut, a rolling wheel and a shell. The two side faces of the shell are each provided with two grooved rails symmetrically, one grooved rail is a straight-line grooved rail, the other grooved rail is a curved-line grooved rail, and the straight-line grooved rail is located above the curved-line grooved rail; the lead screw is installed in the shell and can rotate around the axis of the lead screw, the nut is installed on the lead screw in a sleeving mode, the displacement of the nut is driven by the rotation of the lead screw, the two sides of the lower end of the nut are each provided with a protruding block, and the two protruding blocks can be embedded in the straight-line grooved rails on the two sides of the shell; the rolling wheel is connected with the nut, the middle of the rolling wheel presses a transfusion tube which passes through the shell, the two ends of the rolling wheel are embedded in the curved-line grooved rails on the two sides of the shell, the rolling wheel moves along with the nut and along tracks of the curved-line grooved rails, and the effect for controlling the opening degree of the transfusion tube is achieved. The vein transfusion device regulating valve with the nonlinear compensation can make a variation relationship between the displacement of the rolling wheel and liquid velocities be a linear variation relationship, an automatic transfusion control device can control the liquid velocities conveniently, and therefore the accurate control over the transfusion velocities can be achieved.

The invention provides a liquid clarity detection method, a liquid clarity detection system and a liquid clarity detection device. The method comprises the following steps: determining actual flow velocity of liquid, and determining measured flow velocity of the liquid by using an optical flow sensor; and determining liquid clarity according to the difference between the actual flow velocity and the measured flow velocity. A principle is as follows: the optical flow sensor acquires instantaneous displacement of a target according to the position change of an imaged bright point; when the liquid is in a dirty state, the imaged bright point is clear to facilitate the calculation of the liquid velocity, and the dirtier the liquid is, the more accurate the calculation of the liquid flow velocity is; and when the liquid is in a clear state, the imaged bright point is not obvious to be bad for calculation of the liquid speed, so the clearer the liquid is, the more the liquid flow velocity determined by the optical flow sensor tends to be zero. Therefore, the clarity of the liquid can be determined through a difference value between the liquid flow velocity determined by the optical flow sensor and the actual flow velocity of the liquid.

The invention relates to a method and system for determining the relationship between refined throat size and gas-liquid velocity difference. The method for determining the relationship between refined throat size and gas-liquid velocity difference includes step 1 determining the gas flow model inside a crude oil refining nozzle; step 2 acquiring the maximum value of the nozzle outlet throat diameter at the supersonic flow; step 3 acquiring the measurement parameters, including the nozzle liquid film thickness, the nozzle outlet throat diameter, and the steam input, in the process of crude oil catalytic cracking; and step 4 calculating the relationship between nozzle throat size and liquid film thickness according to the measurement parameter fitting formula. The relationship between the nozzle throat size of a crude oil refined nozzle and the liquid film thickness is analyzed and simulated, so that the optimal relationship range between the nozzle throat size and the liquid film thickness during the atomization process of crude oil is obtained and the guidance for improving the crude oil refining performance and reducing the energy consumption is provided.

The invention discloses a double-cylinder type high-precision liquid velocity-flow meter comprising a differential-pressure type velocity-flow signal generator, a differential-pressure high liquid-gas conversion cylinder, a differential-pressure low liquid-gas conversion cylinder, a differential pressure sensor and a micro-computer. Both the cylinders are provided with air exhaust nozzles. The differential pressure sensor detects differential pressure of compressed air in the differential-pressure high liquid-gas conversion cylinder and compressed air in the differential-pressure low liquid-gas conversion cylinder. The micro-computer converts the differential pressure signals, detected by the differential pressure sensor, into velocity and flow. The double-cylinder type high-precision liquid velocity-flow meter integrates functions of a flow meter and a velocity meter, and preferably, functions in zeroing and freely selecting velocity or flow value for digital output. The invention further discloses a method for outputting the velocity-flow values converted from voltage analog signals in the same machine. According to the method, the double-cylinder type high-precision liquid velocity-flow meter is adopted, and the function and effect that the velocity / flow value digital display is freely selected in the same machine.