402 results about "Liquid density" patented technology

A sensor for measuring density of a liquid that comprises a float unit having a sealed hollow casing that contains a first magnet and a strain-gauge unit having a sealed hollow casing that contains a strain gauge and a second magnet arranged coaxially to the first magnet. Coaxiality of the magnets is provided by means of a guide rod installed on the casing of the strain-gauge unit and used to guide the float unit by inserting the guide rod into the central opening of the float unit casing. A characteristic feature of the sensor is that changes in the density of the liquid that cause displacement of the float cause detectable deformations of the strain gauge via forces of magnetic interaction between the first and second magnets without physical contact between the magnets. Since the elements of the sensor are located in sealed casings, they are not subject to damage and do not require maintenance.

A sensor arrangement for ascertaining the density and the viscosity of a liquid is proposed, having an arrangement comprising at least two basic sensor elements, at least one of which can be wetted with the liquid, and having electro-acoustical transducers (6) in the basic sensor elements for generating and detecting surface acoustic waves with predetermined wave modes, from whose propagation behavior along a measurement path a measure for the density and the viscosity of the liquid can be ascertained. Liquid traps (17) for the liquid, which extend in the applicable measurement path, are disposed in the region of at least one of the basic sensor elements, parallel to the direction of propagation of the surface acoustic wave.

A method for carrying out CT safety detection on liquid by radioactive source includes setting detected liquid article on rotary platform, emitting ray on liquid article by radioactive source and passing ray through said article to be received by detector and data collector just facing ray beam and to be formed as projective data, transmitting projective data to computer data processor for obtaining liquid density of detected liquid article, comparing obtained density to density of dangerous article stored in databank and displaying detection result of detected liquid article in direct ¿C viewing way.

A CT method and an apparatus for liquid safety-detection with a radiation source relate to a radiation imaging detecting technology field. The invention comprises using a radiation source, a detector and data collector, a computer data processor; and the main steps are: 1) a liquid article to be detected being placed onto a rotary platform which is rotatable; 2) the ray emitted from the radiation source passing through the liquid article, and being received and formed into projection data by the detector and data collector; and 3) the projection data being transmitted to the computer data processor, which processes it to obtain the liquid density of the detected article, compares the result with the densities of dangerous articles in a current database, and then visually displays the detected information of the detected liquid article. Comparing to the prior art, the invention has a small volume, a strong anti-interference, a high accuracy of detection, an easy shielding, and a high use safety and reliability.

Water-resistant preformed resilient bags are applied to a porous material specimen having a coarse external surface to provide for more consistent measurement results in water displacement tests. The preformed bag is configured to collapse and substantially conform to the material specimen's external surface and to provide planar collapsed portions extending away from the specimen. The preformed bags are precision manufactured and each applied to a respective specimen in a manner in which the bag consistently displaces the same volume of water when used in water displacement tests over many specimens. The volume of the bag can be accounted for when obtaining the volume of the specimen. The method of sealing the specimen includes inserting the specimen into a preformed bag and collapsing and sealing the bag such that is conformal to the external surface of the specimen. The method can provide a preferred operating vacuum pressure corresponding to the specimen type (such as porosity or coarseness) which can automatically direct the operational parameters of the bag sealing operation. The system includes a preformed bag configured to receive a material specimen therein, a vacuum apparatus for removing the air from the bag, and a sealing means for sealing the bag. In one embodiment the vacuum apparatus includes an integrated scale for measuring various weights associated with the specimen for liquid density determinations.

The invention discloses a dynamic compensation method for an ultrasonic flow meter. The dynamic compensation method comprises the step of measuring time dynamic period compensation and further comprises the step of conducting fluid density compensation, the step of conducting time difference temperature compensation of ultrasonic countercurrent spreading time and ultrasonic fair current spreading time, the step of looking up a calibration coefficient dynamically according to a calibration coefficient lookup table established in advance and the step of calculating the flow of multistage dynamic compensation, and therefore measuring time dynamic period compensation is conducted on the problem that ultrasonic spreading time measurement has deviation due to the water attack effect brought by instant opening and closing of a valve or residual bubbles in a pipeline; furthermore, compensation is conducted on the liquid density change caused by the temperature; temperature compensation is conducted on the time difference benchmark treating the influences of the temperature change of an element in a circuit box, the lookup table is established on the calibration coefficient without a constant value, and dynamic looking-up is conducted during flow calculation.

The invention discloses a recycling process of polyaluminium chloride filter residue; the process is as follows: adding water and hydrochloric acid into a first reaction kettle to prepare a 22-28% hydrochloric acid solution, adding the filter residue, stirring until the filter residue is dissolved; heating to 55 to 85 DEG C, adding aluminium-containing waste slag, after the addition, controlling the material liquid system temperature to be 92 to 118 DEG C for reacting for 2.5-5h; controlling the basicity of the material liquid after the reaction to be 27% + /-11% by adjustment of weight parts of the hydrochloric acid and the filter residue; separating the residue from the material liquid after the reaction, taking mother liquor, adding calcium aluminate powder; adjusting the material liquid density to be greater than or equal to 1.20g / ml, adding a synergist solution, reacting at 85-125 DEG C for 2.5-5h to obtain liquid polyaluminium chloride; and collecting and recycling the produced filter residue for reusing in production system to continue participating into the reaction. The recycling process achieves reuse of the filter residue in the polyaluminium chloride production system without addition of process equipment and other materials, greatly reduces the polyaluminium chloride production cost, reduces filter residue emissions, and conforms to environmental protection concepts of circular economy, energy saving and emission reduction.

The invention relates to a double-energy X-ray spiral CT system for detecting liquid safety, which comprises a detecting device consisting of an X-ray source, a rotary table, a detector or an interlayer detector and a data acquisition unit, and a control part consisting of a microprocessor and a controller, wherein the front end of the detecting device is provided with the X-ray source; the X-raysource is the switchable high-voltage X-ray source or the fixed high-voltage X-ray source; the middle part of the detecting device is provided with the spiral lifting rotary table used for placing a detected liquid; the rear side of the spiral lifting rotary table is provided with the detector or the interlayer detector; the data acquisition unit is connected with the detector or the interlayer detector; the control part comprises the microprocessor and the controller connected with the microprocessor; the controller is connected with the X-ray source and the spiral lifting rotary table; and the microprocessor is connected with the data acquisition unit. The method comprises irradiation, detection, acquisition, comparison, and obtaining a detection result. The system can detect liquid density and equivalent atomic number and ensures to accurately judge liquid property.

The invention discloses T-type oil-water separation equipment integrating two special wettable materials, and belongs to the technical field of wastewater treatment. The T-type oil-water separation equipment is of a three-channel structure and is arranged into a lateral T shape or an inverted T shape according to an oil-water separation system. In the three-channel structure, a vertically-upward channel serves as an oil-water mixing system inlet channel, and the other two channels serve as separation channels. A super-hydrophobic and super-oleophilic separation membrane AW and a super-hydrophilic and underwater super-oleophobic separation membrane AO are arranged in the two separation channels respectively. Compared with an existing oil-water separation mode adopting a single membrane, the problem that a liquid barrier layer is formed due to the large liquid density difference is solved, and continuous oil-water separation is achieved; meanwhile, hydrostatic pressure borne by the separation membranes is reduced in the double-channel separation mode, and the requirement for the mechanical strength of the separation membranes is reduced; continuous oil-water separation without the consideration of the oil-water density difference can be achieved.

A method and an apparatus for liquid safety-detection by backscatter with a radiation source relate to a radiation detecting technology field. The invention comprises using a radiation source, a collimator, a detector, a data collector and a computer data processor, and has the main steps of: 1) a liquid article to be detected being placed onto a rotatable platform; 2) the ray emitted from the radiation source causing Compton scattering at the surface of the liquid after passing through the package layer of the liquid article; 3) the scattering photons being received by the detector after passing the collimator; 4) the detector transmitting the received data to the data collector; and 5) the data collector transmitting the amplified and shaped data to the computer data processor, which processes the data to obtain the liquid density of the detected article, then compares the result with the densities of dangerous articles in a current database, and gives warning if finding that the density of the detected article is consistent with that of a dangerous article. Comparing to the prior art, the invention has a convenient use, a rapid and accurate detection, a strong anti-interference, a high use safety and reliability, and an easy protection.

A separation device for separating a wanted end product from a liquid sample comprises a container (2) having a first end (5) and a second end (7), the first end having a central orifice (6), a plunger (3) slideably disposed in the container (2) to define a variable liquid receiving chamber between the plunger (3) and the orifice (6), and a permeable partition member (9) mounted to the plunger (3) in a spaced relationship thereto to define a compartment (12) between the partition member (9) and the plunger (3) for receiving liquid density gradient medium (13), wherein liquid may be drawn into the container (2) and expelled therefrom, respectively, through the orifice (6) by movement of the plunger (3) relative to the container (2). A method for separating a wanted end product from a liquid sample is also disclosed.

The invention provides a method and a device for determining a leakage rate of an oil casing annulus of a gas well. The method comprises the steps of: acquiring basic data and annulus pressure relief data of the gas well, wherein the basic data of the gas well comprise an annulus wellhead pressure and an annulus protection liquid density; determining a gas temperature of a leakage point in an oil pipe and a gas pressure of the leakage point in the oil pipe based on the annulus wellhead pressure and the basic data of the gas well; determining a wellhead leakage rate based on the annulus pressure relief data and a surface pipeline hole leakage model; determining a gas well annulus leakage rate equation based on the wellhead leakage rate and the gas pressure of the leakage point in the oil pipe so as to determine the leakage rate of the oil casing annulus of the gas well. According to the method and the device for determining the leakage rate of the oil casing annulus of the gas well, the leakage rate of the oil casing annulus can be calculated by utilizing the daily production data of the gas well and the pressure relief parameters of the oil casing annulus, and the shortage that the leakage rate of the oil casing annulus of the gas well cannot be calculated currently is covered.

The invention provides a method for measuring vertical displacement by utilizing hydraulic pressure and temperature and a device thereof. The invention is characterized in that pressure sensors and temperature sensors are respectively arranged at the bottom parts inside n same liquid containing tubes; the pressure sensors and the temperature sensors are connected with a computer system through a circuit; the lower parts or the bottoms of the n liquid containing tubes are communicated with each other through hoses, wherein, a liquid containing tube is vertically arranged at the datum point, and the rest liquid containing tubes are arranged vertically at a plurality of points to be measured; and the change in vertical displacement of the points to be measured can be obtained through comparison between all the points to be measured and the datum point liquid surface elevation difference Delta Ln and the analysis by the computer. The method provided by the invention takes into account the effects of environmental temperature on the measurement accuracy; the change in the hydraulic column is measured by the pressure sensors; the liquid density is subjected to conversion at different temperatures; and the invention has the characteristic of high measuring accuracy. Meanwhile, the method is not affected by disturbance by beams. The invention has the characteristics of simple structure, convenient installation and debugging, good reliability, and low cost.

A liquid suspension for planarizing an outer surface of a material comprises a liquid suspension medium of a specific liquid density; and a plurality of solid, contact-sensitive abrasive particles of a constant solid density and suspended in the liquid suspension medium. The liquid and solid densities are approximately the same so that the abrasive particles freely and stably suspend in the liquid suspension medium, without gravitational separation by settling down or floating up. In this way, damaging contacts of the solid abrasive particles with one another are minimized.

A baffle (1) for reducing hydraulic ram pressure in a liquid in a tank (5,9) in which it is located resulting from impact of a projectile on an external surface (6,10) of the tank, includes at least two outer walls (2) spaced apart to define therebetween at least one cavity (3) and a compressible gas or gaseous mixture at reduced, atmospheric or enhanced pressure contained in the cavity (3). The baffle outer walls (2) are sufficiently strong to withstand the pressure of the gas or gaseous material contained in the cavity (3) are sufficiently strong to resist the hydrostatic pressure of liquid in a tank (5,9), when the baffle (1) is located in the liquid in the tank (5,9), and are spaced apart by an amount sufficient to provide the cavity with a volume sufficient to allow a shock wave or waves in the liquid resulting from compression of the liquid by impact of a projectile on the tank external surface (6) to be reduced by expansion of the compressed liquid into the cavity volume. The gas or gaseous mixture has a density sufficiently different from the density of the liquid to provide substantially total reflection within the baffle (1) of the shock wave or waves impinging on the baffle.

The invention discloses a buoyancy scanning multiphase liquid location surface detection method, and it is: vertical reciprocating the uniform speed pulling floater, and when it touching liquid location or surface, it produces pulling force mutation, and scanning to detect the mutation moment, and multiplying the floater running speed and time, then amending with the initiation location, so as to come up with the accurate liquid location or surface height value. The detecting device to implement the said detecting method includes the signal processing host, the floater, the driven motor and the pulling sensor, and the floater, whose overall average density greater than the density of measured liquid, has the flat bottom, the pulling sensor connecting on the floater traction line in series, the pulling sensor signals sending into the signal processing host through data transmission channel, the switch signals of the driven motor electrical controller connecting to the signal processing host. The technology scheme can detect the liquid location or surface under the changing conditions of the measured liquid density, and also detect the multi-media crossing surface or liquid location of different densities, each un-mixed multiple liquids and liquid-solid-coexistence, and it has the technical features of simple technical compose, accurate detection, broad application.

The invention discloses a resonant tuning fork liquid density sensor with piezoelectric actuation and piezoelectric detection, comprising a tuning fork body, a clamped body, a piezoelectric actuator, a piezoelectric vibration pickup, and a temperature sensor, wherein, the piezoelectric actuator and the piezoelectric vibration pickup are arranged on the clamped body, the generated alternating force is transmitted to the tuning fork body by the piezoelectric actuator to let the tuning fork body produce simple harmonic vibration with intrinsic frequency itself; when immersing the tuning fork body in a liquid under test, the additional mass of the tuning fork body changes so as to let the vibration frequency of the tuning fork body change; by picking up the vibration signal with the piezoelectric vibration pickup, the detection of the vibration frequency of the tuning fork body is realized; because the vibration frequency of the tuning fork body is a monotone function of the liquid density, thus the real-time on-line detection of the liquid density is realized; and the temperature sensor is arranged on the clamped body for real-time detection of the temperature of the liquid under test, and is used for compensating the variation of the elastic modulus of the tuning fork body. According to the invention, the high precision on-line detection of densities of various liquids at different temperature can be realized.

The invention relates to the determination of the liquid level height difference of a well casing of a gas well in the field of gas field development, provides a method for determining the liquid level height difference of the well casing of a liquid accumulation gas well by utilizing the communicating vessel principle, and particularly relates to a method for determining whether liquid accumulation exists in a gas well or not and determining the liquid accumulation degree. According to the method, firstly, the oil pressure, the casing pressure, the gas density and the liquid density of the gas well during well closing are obtained; secondly, the accumulation liquid height difference of the well casing of the gas well is obtained through the calculation of the oil pressure, the casing pressure, the gas density and the liquid density, and the liquid accumulation and the liquid accumulation degree are judged through the accumulation liquid height difference. The accumulation liquid height difference of the well casing of the gas well can be determined through inputting and obtaining oil pressure and casing pressure data of the gas well after the well closing, only well closing oil pressure and casing pressure data needs to be specified, and a well testing instrument does not need to be placed into the well bottom. Compared with the prior art, the method has the advantages that the method is simple and convenient, and the cost is lower.

The invention relates to a prediction method for aerial spray drift of a helicopter based on a model, belonging to the technical field of agricultural aerial sprays. According to the method, atomization surfaces of an agricultural helicopter and a nozzle are simulated, a to-be-predicted domain and boundary conditions of the to-be-predicteddomain are determined, the Fluent is run so as to obtain a wind field formed on the atomization surfaces after the air flow generated by the movement and a rotor wing of a spraying helicopter is blocked by the main body of the helicopter, and variations of pesticide liquid concentration and pesticide liquid density in each of grids of the to-be-predicted domain in the boundary conditions can be simulated through iterative operation so as to obtain the deposition distribution of the pesticide liquid droplet and predict the aerial spray drift of the helicopter. According to the invention, the CFD (computational fluid dynamics) thoughts are applied to the technical field of the agricultural aerial sprays, and the deposition distribution, the drift range and the like of the pesticide liquid to be aerially sprayed can be quickly and effectively simulated, thereby creating conditions for accurately, safely, conveniently and quickly evaluating the agricultural aerial spray operation.

The invention provides a liquid density on-line monitoring system based on ultrasonic diffraction grating, which comprises a laser, a beam expander, a collimator, a piezoelectric ceramic plane ultra radiation wave generator, a direct digital synthesizer (DDS) ultrasonic signal source, an ultrasonic pool, a peristaltic pump sample introduction system and a charge coupled device (CCD) monitoring system. A high-quality monochromatic line light source can be obtained after laser beams output by the laser pass through the beam expander and the collimator, and high frequency sine and cosine signalsgenerated by the DDS ultrasonic signal source stimulate the piezoelectric ceramic plane ultra radiation wave generator to form 'the ultrasonic grating' in the ultrasonic pool. Emergent laser beams ofthe line light source become a row of extremely fine monochromatic diffraction stripes through the diffraction of 'the ultrasonic grating', a converging lens converges emergent rays of same-directiondiffraction angles on the photosensitive surface of the CCD monitoring system. Diffraction strips are collected by the CCD monitoring system into computers, and the space between strips and the density of liquid samples are calculated. The liquid density on-line monitoring system has the advantages of being high in precision, easy to measure in real time, simple and compact in structure, high in operability, free of complicated optical systems, low in cost and the like.

This invention relates to resonant-type measuring liquor density sensor. It includes chaff, chaff base seat, r, piezo-electric vibration pick-up, chaff circuit box, chaff box flange structure and end shield. Chaff processing must ensure planeness and parallelism of the two surfaces in sensor structure. The chaff and the base seat is welded as a integer by vacuum digital bundle welding, the flange structure is connected to the base seat through screw thread, the piezo-electric vibration pick-up and piezo-electric vibrator are separately pasted to same side of the chaff. Then chaff circuit is connected to the seat though screw thread. There is no need of insulation in this system; measuring precision is high, stable and reliable.

Methods of forming a nano-structure for electron extraction are disclosed. One method of forming a nano-structure comprises irradiating an area on a first surface of a thermal conductive film to melt the area across the film. The film is insulated on a second surface to provide two-dimensional heat transfer across the film. The liquid density of the film is greater than the solid density thereof. The method further comprises cooling the area inwardly from the periphery thereof to form a nano-structure having an apical nano-tip for electron extraction.

The invention discloses a salt cavern type gas storage cavity construction process oil-water interface detection method which includes the steps: mounting a high-precision pressure meter and a density meter on a wellhead; respectively measuring the wellhead pressure and the liquid density of a brine mining pipe and an oil filling pipe; substituting measured data into a calculation formula derived according to equivalent 'U'-shaped pipe model construction, and performing oil-water interface calculation to obtain the real depth of an oil-water interface. By the detection method, a downhole tripped detection instrument is omitted, construction risks caused by cable damage or instrument damage in the tripping process are avoided, measure process is simplified, and the complicated technological process of tripping a string again in change of the design depth of the oil-water interface is avoided.

The invention discloses a passive liquid-level measuring device. The device comprises at least one inductive sensor and a decoding circuit module, wherein the inductive sensor is a pressure sensor or a gravity sensor and is disposed at a liquid container and used for acquiring gravity or pressure change parameters in the liquid container in real time. The pressure or gravity change parameters are transferred to the decoding circuit module, and the decoding circuit module acquires liquid-level change parameters in the liquid container according to the prestored cross section and liquid density of the liquid container, and is connected with an external host computer through a data interface. The passive liquid-level measuring device can be installed in a household electrical appliance, and acquire the liquid-level change parameters in a container dynamically in real time.

The invention discloses a device and a method used for measuring the density of a trace amount of volatile liquid. The device comprises a gas phase sample introduction bottle, a drier, an analytical balance, a trace amount sample introduction device, and a master control device; the gas phase sample introduction bottle is used for storing the volatile liquid to be measured; the drier is used for drying the gas phase sample introduction bottle; the analytical balance is used for weighing the gas phase sample introduction bottle before and after storing of the volatile liquid to be measured; the trace amount sample introduction device is used for injecting the volatile liquid to be measured into the gas phase sample introduction bottle; the master control device is used for calculating the density of the volatile liquid to be measured. The device and the method can be used for measuring the density of the trace amount of the volatile liquid accurately.