Density metre-flow metre of fluid media

FIELD: measurement equipment.

SUBSTANCE: invention is intended for measuring liquid parametres immediately in flow. Density metre - flow metre includes measurement column, sensors of absolute pressure 2 and temperature 14 of measured liquid, sleeve 6. On vertical branch 3 of measurement column there installed at H distance are pressure samplers 4, 5, and on sleeve 6 - pressure sampler 8 and temperature sensor 7 of "reference" fluid put to sleeve. Horizontal branch 15 of measurement column is made with variable diametre and has section 16 of calibrated pipeline with smaller diametre D1 and section 17 of calibrated pipeline with increased diametre D2, on which there located are pressure samplers 18, 19. Pulse tubes 9, 11, 12, 20, 21 with "reference" fluid (for example, organic-silicon) connect pressure samplers to appropriate pressure difference transmitters 13, 22. Internal coating of vertical branch reduces resistance to fluid flow. Data processing unit 23 calculates density and mass flow of measured fluid as per the given formulae.

EFFECT: improving measurement accuracy.

2 cl, 1 dwg

 

The proposal relates to the field of measurement technology and is designed to measure the parameters of the liquid in the flow and can be applied in oil and gas, refining, petrochemical and other industries.

Known devices for measuring fluid density when calculating the mass flow belonging to the class of hydrodynamic density meters (Kremlin P.P. Flow meters and counters: a Handbook. - 4th ed., overtime and extra - L.: engineering. Leningrad. separa-tion, 1989.)

A device of the hydrodynamic density measurement, in which the velocity of the medium is measured by the method of zero pressure drop and method a variable pressure drop is measured dynamic pressure through orifice in the working conditions of a possible continuous changes (U.S. Pat. Of the Russian Federation No. 2273016, publ. 27.03.2006 year).

The disadvantage of this device is that it is intended to measure parameters of a homogeneous liquid, which easily passes through a narrowing channel, but when measuring parameters of the mixture, in which the density of the different components, for example oil, is the deposition of fine solid (asphalt) inclusions in the aperture in the narrow spot and hammered it (Joule-Thomson). Further measurement is not possible or is happening with error the awn.

Also known flowmeters expanding type, using as pressure sensors, channel set in a particular sequence elements diffusore-confused type.

A device for measuring the flow rate of fluid (U.S. Pat. RU # 2157973, publ. 20.10.2000,). In the known device the sensor in the form of a tubular body has an inlet fitting plot-diffuser section with a maximum cross-section area-confuser and outlet. Based on the measured differential pressure gauges differential pressure in the three sections is determined by the consumption by the well-known formulas using a calculator.

A disadvantage of the known device is the lack of automatic density correction reference fluid temperature and pressure in relation to the working conditions of the medium, which affects the accuracy of measurement of the parameters of the liquid.

The known density of the liquid or gaseous media containing the loop pipe of equal cross-section, consisting of upward, horizontal and downward branches, three otbornye pressure mounted respectively on these branches, two pressure difference sensor, absolute pressure sensor, temperature sensor working environment, a pulse tube with reference fluid, perceiving the pressure of working medium directly contact method, the recording unit, while the densitometer equipped with a temperature sensor reference fluid and more odbornikom pressure placed on the body of thermometer temperature sensor reference fluid, and Oborniki pressure mounted on the ascending, descending branches of the loop pipe and obornik pressure placed on the body of the sensor are on the same level in the lower part of the loop. (A positive decision on granting a patent for a utility model application No. 2007119410/22 (021158).

The work of known construction is based on the method of comparing the density of the reference liquid of the statics, with the density of the working medium in the dynamics, which increases the measurement accuracy. The fluid flow is determined from the measured density values of the working environment, the friction losses on the length of the loop pipe and its diameter.

The disadvantages of the utility model can be attributed to the occurrence of errors in measurement of the flow of production oil wells due to the changing diameter of the pipeline due to circular deposits in it asfaltobetonnyh inclusions. And since the flow measurement depends on the friction loss, and pipe diameter, then the change entails errors in measurement.

The task of the invention is to improve the accuracy of flow measurement and raft the spine of the working fluid.

This task is solved in that the density meter the flow of liquid media containing inlet pipe, the measuring column having a vertical and a horizontal branch, outlet, gauges, absolute pressure and temperature of the measured fluid, Oborniki pressure, two of which - the top and bottom, mounted on vertical branches, two pressure difference sensor, drenched reference fluid pulse tube for connecting odbornikov pressure with appropriate sensors pressure difference and the registering unit, equipped with a set-drenched "reference" liquid pipe temperature sensor reference fluid and more odbornikom pressure located on the same level with the bottom odbornikom pressure vertical branches with diameter D, is made with internal coating, which reduces the resistance to movement of the fluid flow, the upper obornik pressure on the vertical branch is located from the bottom of otbornye pressure at a distance of H=(1÷1,5)D and connected with the said sleeve and pulse tubes with reference fluid, the lower and more Oborniki pressure pulse tubes with reference fluid is connected with the first pressure difference sensor, the horizontal branch of the measuring column contains a plot of the calibrated pipe length L1smaller di is m D 1and the plot of the calibrated pipe length L2with a sharp expansion of its diameter D2in the outlet port, and, L1=(2÷3)D1and L2=(3÷4)D2with the first odbornikom pressure and the second odbornikom pressure, located on the first otbornye pressure at a distance L=(2÷3)D2on a plot of diameter D2while the first and second Oborniki pressure connected to the pulse tubes with reference fluid from the second pressure difference sensor, sensors, absolute pressure and temperature of the measured and reference fluid and sensors pressure difference is connected with the registering unit, configured to determine the density and flow rate of the fluid being measured respectively by the formulas:

,

,

where ρW- the density of liquid, kg/m;

ρt FL- the density of the reference fluid, refer to working conditions, kg/m3;

Δ - the pressure difference between the column reference fluid and the hydrostatic pressure of the liquid on the section height H of the vertical branch, PA;

g - free fall acceleration, m/s;

H is the distance between the upper and lower points of the selection pressure, m;

M - mass flow rate of liquid, kg/s;

D1and D2- according to the diameters respectively plots of calibrated pipelines, m;

ΔP1- pressure drop measured over a length L2plot the calibrated pipeline D2, PA.

Internal floor vertical branch can be performed by vitrification or by using the epoxy layer, or other material, which reduces the resistance to movement of the fluid stream.

Figure 1 shows the device in statics.

Density meter contains inlet pipe 1, the absolute pressure sensor 2, the vertical branch 3 with a diameter D, which is provided with a bottom (first) pressure sensor 4, the upper (second) pressure sensor 5 with a spacing of H=(1÷1,5)D selected from the source: Adelton, Lusiwasi, Lupiano "Hydraulics and aerodynamics), stroiizdat, 1985, sleeve 6 with reference fluid, which includes a thermometer "reference" liquid 7 and the additional pressure sensor 8, the pressure sensor 5 is connected pulse tube with reference fluid 9 with the said sleeve 6, and the lower the pressure sensor 4 and an additional pressure sensor 8 are on the same level and connected to the pulse tubes with reference fluid 11 and 12 respectively with the first pressure difference sensor 13. On the vertical branch 3 is thermometer of the liquid 14. As a reference liquid is employed in direct contact with the measured liquid is awn, but not miscible, for example kremniiorganicheskie with known coefficients of volume expansion and contraction.

Horizontal branch 15 of the measuring column is made with a variable diameter and has an area of 16 calibrated (one diameter) pipe length L1with a smaller diameter D1and section 17 of the calibrated pipe with a sharp increase in the diameter of D2and length L2where L1=(2÷3)D1and L2=(3÷4)D2,taken from source: Adelton, Lusiwasi, Lupiano. Hydraulics and aerodynamics, M., stroiizdat, 1985 At site 17 is located a first pressure sensor 18 and located him at a distance L=(2÷3)D2on one level, the second pressure sensor 19. The pressure sensors 18 and 19 are connected to the pulse tubes with reference fluid 20 and 21 respectively with the second pressure difference sensor 22. Section 17 of the outlet pipe ends.

The absolute pressure sensor 2, thermometer "reference" liquid 7, thermometer measured fluid 14 and two pressure difference sensor 13 and 22 are connected to a recording unit 23 (the BATTLE processing unit), which program calculates the density of the measured fluid, its flow rate and generates a visualization tool, such as a computer (not shown). In place to the beat of the reference liquid measured by liquid made "mini" camera for transmitting pressure (not shown).

The density meter the flow of liquid media works as follows.

Liquid Q is supplied from the input pipe (where the absolute pressure sensor 2 measures the pressure of the fluid being measured and transmitted to the block 23), to the inlet of the ascending branches 3 and rises on it, the bottom obornik (gauge) pressure 4 transmits the pressure in the negative chamber of the pressure difference sensor 13 according to the pulse tube with a "reference" liquid 11 and the upper obornik (gauge) pressure 5 transmits the pressure through the sleeve with reference fluid 6 and the pulse tube 9 and 12 in the positive chamber pressure difference sensor 13, the readings are transmitted at block 23. Thermometer 8 measures the temperature of the reference fluid. The output from the vertical branch of the temperature of the liquid measured by the temperature sensor 14, the readings of which are received at block 23.

With the passage of the fluid being measured on the horizontal branch of the first pressure sensor 18 transmits readings in the freezing chamber of the second pressure difference sensor 22, the second pressure sensor 19 transmits readings in the positive chamber pressure difference sensor 22, which is connected with the registering unit 23.

In the measurement process used method of comparing static indicators reference fluid with changing parameters of the measured fluid.

The essence of the measure is disclosed in the example below, calculate the density of the fluid being measured.

The measured fluid flow "Q" from the input pipe, where the measurement of the absolute pressure P, is fed to the input of the vertical pipe section and passes through it, thus by measurement of differential pressure of a column of the fluid being measured at two points: the first (lower) pressure sensor and the second (upper) pressure sensor, and temperature of the liquid tWand temperature reference liquid ttin the sleeve. The differential pressure on the ascending branch is determined by the following formula:

,

where Δ - the pressure difference between the column reference fluid and the sum of the hydrostatic pressure of the liquid column and the pressure losses by friction in the ascending line at distance N.

The pressure generated by the reference liquid is determined by the formula:

,

where ρt FL- the density of the reference liquid, kg/m3,

g - free fall acceleration, m/s2,

N - the distance between the points of pressure, m

ΔW- the hydrostatic pressure of the liquid column, is equal to the distance H, is determined by the formula:

,

where ρW- the density of liquid, kg/m3

As the distance H between the points of the selection pressure is selected as N=(1÷1,5)D, where D is the diameter of the of Truboprovod ascending branch 3, the friction losses can be neglected, as they are not significant, and on the basis of the calculation formulae for the friction losses:

,

where λ is the coefficient of hydraulic resistance;

V is the velocity of fluid flow in a pipe of diameter D, is limited by the Reynolds number: Re=4·104selected calculation and by experiment.

The hydraulic resistance coefficient λ can be reduced by choosing the smallest roughness of the vertical part of the pipe due to internal coating made of epoxy layer or by using steklovanija etc.

Then the formula (1) can be written in the following form:

,

where,

when ρt FL20 et[1-βt(tFL-20)+KpP], kg/m3.

where R20 et- the density of the reference liquid under normal conditions (t=20°C; P=0,103MPa).

βt- coefficient of volume expansion of the "standard" fluid when the temperature changes by 1°C;

tFL- the measured temperature of the reference fluid, °C;

Kp- coefficient of volume compression "reference" liquid, 1/MPa;

P is the absolute pressure, MPa.

The coefficients βtand Kptaken from the state system standard data.

The flow measurement W is drasti takes into account the measured fluid density ρ Wand the measured pressure drop in the horizontal section 17 of the pipeline with a diameter of D2to match the diameter of D1.

Differential dividing ΔP1on the horizontal section of the pipeline D2is carried out according to the formula (Adelton, Lusiwasi, Lupiano. Hydraulics and aerodynamics, M., stroiizdat, 1985:

where ΔP1- pressure drop measured over a length L2,plot the calibrated pipeline D2, PA;

V is the flow velocity in the calibrated pipeline with a diameter of D1,m/s;

D1- diameter plot of calibrated pipe m;

D2- diameter plot of calibrated pipe m;

ρW- the density of liquid, kg/m3;

From the formula (6) find the flow velocity V in a calibrated pipeline with diameter D1.

, m/s.

Knowing the velocity V, density ρWand the diameter D1determine the mass flow of fluid through the calibrated pipeline D1according to the formula:

or

.

In the proposed product measurement accuracy is achieved through the application of the method of comparison of static indicators reference fluid with changing parameters of the measured fluid, and through the use of the site ka is brownnose pipeline with a sharp widening of the diameter as a sensor of hydrodynamic type, as well as minimizing pressure losses by friction by applying the surface with the lowest surface roughness on the horizontal measuring section.

On the proposed product laboratory tests on water, positive results, confirming the correctness of the choice of a constructive solution to the measurement of density and flow.

1. The density meter the flow of liquid media containing inlet pipe, the measuring column having a vertical and a horizontal branch, outlet, gauges, absolute pressure and temperature of the measured fluid, Oborniki pressure, two of which - the top and bottom, mounted on vertical branches, two pressure difference sensor, drenched reference fluid pulse tube for connecting odbornikov pressure with appropriate sensors pressure difference, and the registering unit, characterized in that it has installed on-drenched "reference" liquid pipe temperature sensor reference fluid and more odbornikom pressure located on the same level with the bottom odbornikom pressure vertical branches with diameter D, is made with internal coating, which reduces the resistance to movement of the fluid flow, the upper obornik pressure on the vertical branch is located from the bottom of otbornye pressure the Oia at a distance of H=(1÷1,5)D and connected with the said sleeve and pulse tubes with reference fluid, the lower and more Oborniki pressure pulse tubes with reference fluid" is connected with the first pressure difference sensor, the horizontal branch of the measuring column contains a plot of the calibrated pipe length L1smaller diameter D1and the plot of the calibrated pipe length L2with a sharp expansion of its diameter D2in the outlet port, and,
L1=(2÷3)D1and L2=(3÷4)D2with the first odbornikom pressure and the second odbornikom pressure, located on the first otbornye pressure at a distance L=(2÷3)D2on a plot of diameter D2while the first and second Oborniki pressure connected to the pulse tubes with reference fluid from the second pressure difference sensor, sensors, absolute pressure and temperature of the measured and reference fluid and sensors pressure difference is connected with the registering unit, configured to determine the density and flow rate of the liquid, respectively, by formulas
,
,
where ρW- the density of liquid, kg/m3;
ρt FL- the density of the reference fluid, refer to working conditions, kg/m3;
Δ - the pressure difference between the column "reference" liquid and guide staticheskim the pressure of the fluid being measured on the section height H of the vertical branch, PA;
g - free fall acceleration, m/s;
H is the distance between the upper and lower points of the selection pressure, m;
M - mass flow rate of liquid, kg/s;
D1and D2accordingly, the diameters of the sections calibrated pipeline, m;
ΔP1- pressure drop measured over a length L2plot the calibrated pipeline D2, PA.

2. The density meter the flow of liquid media according to claim 1, characterized in that the inner coating vertical branch made ostekleneniem or using epoxy layer.



 

Same patents:

FIELD: instrument engineering; oil and gas industry.

SUBSTANCE: invention can be used in oil and gas extraction, oil processing, petrochemical and other industries. Density metre-flow metre includes loop-shaped pipe of equal section consisting of rising, horizontal and falling lines, 4 pressure samples installed correspondingly at the rising line (1st pressure sampler), horizontal line (2nd pressure sampler) and falling line (3rd pressure sampler) of loop-shaped pipe and at thermometre casing of calibration liquid temperature sensor (4th pressure sampler). The device also includes the 1st and 2nd pressure-difference transducers, absolute pressure sensor, working fluid temperature sensor, calibration liquid temperature sensor, pulse tubes with calibration liquid sensing pressure of working fluid and recording unit. The 1st, 3rd, 4th pressure samplers and additional pressure sampler (5th) installed at falling line of loop-shaped pipe are arranged at one level in loop lower end. The 2nd pressure-difference transducer is connected to the 5th and 1st pressure sampler by means of pulse tubes. The 1st pressure-difference transducer is connected to the 3rd and 4th pressure sampler. Thermometre is connected to the 2nd pressure sampler. Liquid or gas density and flow rate is calculated from the specified expressions.

EFFECT: accuracy increase, extension of functional capabilities.

2 cl, 1 dwg

FIELD: physics, measurement.

SUBSTANCE: invention is related to the field of materials analysis by determination of their density and may be used in thermal power plants and other industrial enterprises as instrument for monitoring of quality characteristics of fuel gas. According to invention density meter is available in two versions accordingly with two and one measuring vessels. In the last case reference gas used is atmosphere air. Every of vessels from the side of its upper end has throttle that communicates to atmosphere, density meter sensitive element is arranged in the form of elastic membrane, and device of measuring signal generation is arranged in the form of chamber that is separated by partition into two compartments, at that at least part of partition is specified membrane, and vessels from the side of their lower ends are connected each to one of specified compartments. Membrane may represent round frame with polymer film stretched on it, which is fixed in central part with displacement marker arranged in the form of plate, having shape of central symmetrical flat figure, and radial elastic threads that are evenly stretched between edges of plate and frame.

EFFECT: increase of measurements accuracy and simplification of density meter design, which works according to principle of investigated and reference gases densities comparison.

4 cl, 3 dwg

FIELD: physics, measuring.

SUBSTANCE: use: for measuring of density of liquid or gaseous mediums. Density gauge for liquid or gaseous mediums, contains the loop-type pipe of equal section consisting of ascending, horizontal and descending branches, three pressure selectors mounted accordingly on ascending, horizontal and descending branches of the loop-type pipe, two data units of a difference of pressures, the data unit of terrain clearance pressure of a working environment, a working environment temperature sensing device, pulsing tubes with the "reference" fluid, perceiving pressure of a working environment immediately contact method, and the registering block, thus it is supplied by a temperature sensing device of a "reference" fluid, and additional pressure selector on the case of the thermometer of a temperature sensing device of a "reference" fluid, thus the pressure selectors mounted on ascending, descending branches of the loop-type pipe and the pressure selector, disposed on the case of the thermometer of a temperature sensing device of a "reference" fluid, are located at one level in the inferior part of a loop, And the pressure selector, mounted on an ascending branch, pressure transmits to the data unit of a difference of pressures in its minus cabinet, the pressure selector, located on a horizontal branch, transmits pressure in positive cabinets of data units of a difference of pressures, the pressure selector, mounted on a descending branch, transmits pressure in the minus cabinet of other data unit of a difference of pressures, thus data units of a difference of pressures, the thermometer of a temperature sensing device of a "reference" fluid, the data unit of terrain clearance pressure of a working environment and a working environment temperature sensing device are related to the registering block.

EFFECT: increase of measurement accuracy of density of liquid or gaseous mediums.

1 dwg

FIELD: physics.

SUBSTANCE: flow rate of two-phase vapour-liquid-gas mixture is evaluated on the basis of mixture density and dynamic pressure. Density is evaluated by measuring static pressure difference in two mutually antithetical points of horizontally focused section of channel. Dynamic pressure is evaluated by measuring pressure difference of end and stern of integrating tube mounted normally to channel axis.

EFFECT: higher measurement accuracy of annular dispersed flow and stratified flow; ease and efficiency of implementation.

5 dwg

FIELD: assessment of technological processes conduction quality.

SUBSTANCE: substance of invention lies in the following: method for determination of liquid surface tension and density includes supply of gas to the inlet of gas supply tube, which is immersed at preset depth in monitored liquid, and measurement of maximum pressure in tube. Additionally quantity of gas bubbles that were supplied into liquid is measured, and by values of maximum pressure in tube and quantity of gas bubbles conclusion is made about surface tension and density of monitored liquid.

EFFECT: increase of accuracy and expansion of method functional resources.

1 dwg

FIELD: invention refers to extraction of useful components out of ores at separation of useful fossils.

SUBSTANCE: mode includes process of size reduction of ores in laboratory mill in dry, wet modes and with additives. At that in process of physical impacting they define by calculating-empirical way specific energy wasted on size reduction, measure specific surface of particles after size reduction and calculate specific surface energy of ores according to definite relation.

EFFECT: increases efficiency of process of extraction of useful components out of ores and optimizes working regimes of present apparatus used at stage of preparation of minerals.

2 dwg

FIELD: measuring technique.

SUBSTANCE: method comprises measuring kinetic energy of flow of fluid to be studied, directing the fluid to the magnetically liquid sensor, measuring deformation of magnetically liquid sensor, and determining density using the data obtained from the deformation sensor. The device comprises capillary branch pipe that is oriented perpendicularly to the flow and receives the magnetically liquid sensor made of flexible spherical shell made of a flexible material and completely filled with a magnetic liquid. The sensor is set in the measuring coils interconnected in series. The outputs of the coils are connected with the first inlet of the secondary instrument. The second input of the secondary instrument is connected with the output of the pressure gage mounted at the entrance to the capillary branch pipe.

EFFECT: enhanced precision.

2 cl, 1 dwg

FIELD: technology for controlling technological parameters of tobacco, possible use for determining filling capability of tobacco.

SUBSTANCE: method includes taking a sample of source tobacco raw stock before its factory processing and performing morphometry with measuring of maximal thickness of leaf and maximal height of intercellular spaces; on basis of results filling capability is calculated from formula M=1421,87·0,9965dmax·0,99933hmax, where: M - filling capability of tobacco, generator; dmax - maximal thickness of leaf, mcm; hmax - maximal height of intercellular spaces, mcm, while coefficients of given equation result from computer-realized iteration method with correlation coefficient R=0,832.

EFFECT: better possibilities for determining filling capabilities of tobacco before beginning of its factory processing.

1 dwg

FIELD: the invention refers to measuring technique particularly to flowing hydrodynamic density meters and may be used for measuring density of various mediums including commercial accounting with suppliers of fuel.

SUBSTANCE: the essence of the arrangement is in that the velocity of medium is measured with the method of zero-point difference of pressure and with the method of variable difference pressure velocity thrust is measured with the aid of a narrowing arrangement in working conditions of possible continuous changing. At measuring the velocity the medium passing through the first measuring site is not subjugated to compression and expansion.

EFFECT: essential expansion of the range of measurements, absence of leakage allows to measure velocity with maximum and identical accuracy on the whole range of measurements.

1 dwg

FIELD: measurement technology.

SUBSTANCE: method can be also used in chemical and food industry for measuring variable level of liquid with unknown density in containers working as under condition of vacuum rarefaction and under high pressure. Two hydrostatic pressure transducers are used for realization. The transducers are disposed one above the other at known distance. According to the method, only readings of lower transducer are used at the moment of transition of gas-liquid boundary through upper transducer but not the difference in readings of both transducers. Moment of transition is defined as moment of equality to zero of difference in corresponding integral conversions from signals of lower and upper transducers. After moment of transition is defined, density and level of liquid is estimated on the base of equations of σ=Dk/gH0 and H=H0D1/Dk, where σ is density of liquid, H is current value of level, H0 is known distance between transducers, D1 is current readings of lower pressure transducer, Dk is readings f lower pressure transducer at the moment of transition of boundary level through upper transducer, g is free fall acceleration.

EFFECT: improved precision of measurement; reduced cost of equipment; reduced service cost.

2 dwg

FIELD: measuring technology.

SUBSTANCE: weight of oil product (OP) released from a tank is calculated by means of a computer on base of volume determined in correspondence with a measured height of OP in the tank and also on base of temperature and density of OP in the tank. To check change of OP weight in the tank the weight of released OP is calculated with a computer on base of values obtained from sensors of temperature and volume installed on fuel and oil release pumps (FRP) and from sensor of density installed in pipeline supplying fuel from tanks to FRP; further, obtained values of consumption of OP in the tank and at FRP are compared and the comparing error of OP consumption in the tank is obtained in the result of comparison.

EFFECT: upgraded accuracy of measurement of volume of oil product at storage and at different modes of release and filling.

FIELD: physics, measurements.

SUBSTANCE: in process of calibration working gas supplied from calibrated flow metre 5 is used to displace liquid without direct contact from reservoir in the form of volumetric flask 6 with calibrated volumes 10, 11 and photoelectric detectors of liquid level 7, 8, 9 of calibrated volume. Using given formula, which includes difference between masses of working gas in the moments of liquid level passage through initial and final sections of calibrated volume and time gap between these moments, mass consumption of working gas is identified. Device for method realisation comprises separating tank 1 with drainage electromagnetic valve 2 and separating gas impermeable membrane 3. Lower part of volumetric flask is connected to expansion reservoir 12, in upper part of which barometre 13 and additional reservoir 14 are installed, and at the outlet to atmosphere - drainage electromagnet valve 15 is installed.

EFFECT: provides for possibility to perform calibration of gas flow metres in the field, without their dismantling off the test bench and other systems of working gas supply, and to identify mass flow of working gas with higher accuracy.

2 cl, 1 dwg

FIELD: physics.

SUBSTANCE: counter for water accounting comprises impeller with two magnets and temperature detector installed inside body with inlet and outlet nozzles, detector of magnetic field, unit of signal generation from temperature detector, timer, unit of control and calculation on the base of microcontroller, memory register for storage of measured total amount of hot water, memory register for storage of measured summary amount of water with temperature below 40 degrees Celsius accounted as cold water, liquid-crystal indicator for display of hot and cold water flow in mass units, switch of liquid-crystal indicator for possibility to separately read the readings.

EFFECT: higher accuracy of measurement due to accounting of dependence on temperature of magnetic field detector actuation frequency recount into liquid flow, increased validity of settlement between consumer and producing organisation.

5 cl, 1 dwg

FIELD: physics; measurement.

SUBSTANCE: before putting a new batch of oil products into a storage container, the level and density of the remaining oil product in the container is measured, and from the graduated characteristic of the container, the volume and mass of the oil product is calculated. This mass value is stored into a computer memory, and compared with documented mass of oil product, which is currently in the container from accounting records of remains, and the balance weight between them is calculated with determination of the sign of the balance weight. A new batch of oil product is put into the container. If a mass flow meter is used, then depending on the value and sign of the balance weight, the mass of oil product is corrected by increasing or decreasing the value of actual measurements of volume and density such that, the balancing weight lies within permissible limits. If a new batch is supplied only in accordance with the consignment note, the total mass of the oil product which is currently in the container based on the note is determined. This mass value is stored into a computer memory and compared with documented mass of oil product in the container from accounting records of remains. The balance weight between them is then calculated and the sign of the weight balance is determined, and the batch of the oil product is corrected such that, the weight balance value tends to coincidence. The invention increases the accuracy of accounting for mass of oil products due to elimination of cumulative errors, which enables detection of unsanctioned siphoning.

EFFECT: increased accuracy of accounting for mass of oil products due to elimination of cumulative errors, which enables detection of unsanctioned siphoning.

FIELD: measuring techniques.

SUBSTANCE: measuring unit of the proposed device comprises a pipe, on which there is a first and second measuring section. The longitudinal axes of the measuring sections are oriented vertically, and their lower ends, through pipes with locking devices, are joined to inlet and outlet pipes respectively. The device also has two radioisotope apparatus for determining mass of gassy fluids, each of which comprises a USE unit for emission source and a unit for detecting UDE radiation, opposite each other, one at the upper and the other at the lower end of the corresponding measuring section. The device also comprises two radioisotope apparatus for detecting presence of gassy fluids in the cross section of the measuring sections, each of which comprises USE and UDE, in the upper parts of the corresponding measuring section on its both diametrically opposite sides. Mass flow rate of the stream during cyclic flow of fluid in the measuring unit is determined from the rate of change of mass the fluid in the filled measuring section during its discharge.

EFFECT: provision for continuous measuring process.

1 dwg

FIELD: physics.

SUBSTANCE: measuring consists of a section of a conduit with two dielectric slit-type windows, microwave generator, connected to a series of two sensors of power incident on the stream and a sensor of power reflected from the stream, sensor of power passing through the stream, mixer, device for input and device for output of microwave energy into/out of the conduit, in the form of a directional coupler circuit with tight coupling, two amplitude detectors, microprocessor and display. The slit-type dielectric windows are coupling apertures in the energy input/output devices and are located up along the conduit section. The primary line of sensors of power through the stream and secondary line of sensors of power incident on the stream and the sensor of power reflected from the stream are connected to ballast loads.

EFFECT: increased sensitivity of the measuring device and simplification of the structure of the device.

1 dwg

FIELD: measurement equipment.

SUBSTANCE: system includes two high-frequency resonators in the form of short-circuited conductors with two mutually square inputs-outputs, mounted on dielectric tube, two limiting coils and limiting separation coil, coriolis flow metre with electronic flow rate and density converters, pressure sensor, computation and control unit, controlled high-frequency generator and switch, flow mode controller, first and second coriolis flow metre gauging controllers, two input amplifiers, four transmission paths and eight separation condensers. By the method of high-frequency radio wave flow probing, relative volume component content is measured in two orthogonal directions; flow velocity is measured by autocorrelation velocity measurement method; and mass flow rate and density of examined medium are measured by coriolis flow metre and gauging controllers. Gauging controllers select coriolis flow metre gauge relevant to the flow mode with account of data obtained from flow mode controller.

EFFECT: enhanced measurement accuracy even for greatly instable flow.

5 dwg

FIELD: measurement equipment.

SUBSTANCE: system includes two high-frequency resonators in the form of short-circuited conductors with two mutually square inputs-outputs, mounted on dielectric tube, two limiting coils and limiting separation coil, Coriolis flow metre with electronic flow rate and density converters, pressure sensor, computation and control unit, controlled high-frequency generator and switch, flow mode controllers, first and second coriolis flow metre gauging controllers, two input amplifiers, four transmission paths and eight separation condensers. By the method of high-frequency radio wave probing, relative volume component content is measured in two orthogonal directions; flow velocity is measured by autocorrelation measurement method; and mass flow rate and density of examined medium are measured with the help of coriolis flow metre and gauging controllers. Gauging controllers select coriolis flow metre gauge relevant to the flow mode.

EFFECT: enhanced measurement accuracy even for greatly instable flow.

5 dwg

FIELD: physics, measurement.

SUBSTANCE: invention may be used for control of oil wells debit. System contains two high frequency resonators installed on dielectric pipe, every of which represents short-circuited conductor in the form of meander with two mutually orthogonal inlets-outlets, short-circuited limiting and limiting-separating coils, Coriolis acceleration flow meter with electronic transducers of flow and density, pressure sensor and temperature detector, computer control unit, controlled high-frequency generator and switching device, controller of flow modes, the first and the second controllers of Coriolis acceleration flow meter, two input amplifiers, four transmitting tracks and eight dividing condensers. Relative volume content of flow components is measured on the basis of method of high-frequency probing of flow in two mutually orthogonal directions, method of autocorrelated measurement is used to measure flow rate, and Coriolis acceleration flow meter and calibration controllers are used for measurement of mass flow rate and density of controlled medium. Selection of valid calibration makes it possible to perform precise measurements of mass flow rate and medium density in unstable condition of non-uniform gas-liquid flow.

EFFECT: provision of accurate measurements of mass flow rate and density of medium.

5 dwg

FIELD: physics.

SUBSTANCE: invention may be used for monitoring of oil wells debit. System contains two high-frequency resonators that are coaxially installed on dielectric tube and each of them represents short-circuited zigzag conductor with two mutually-orthogonal inputs-outputs and limiting and limiting-dividing coils, Coriolis acceleration flow meter with transducers of flow and density, pressure sensor and temperature sensor, computer-control unit, controlled high-frequency generator and switchboard, controller of stream flow modes, the first and the second controllers of Coriolis flow meter calibrations, two input amplifiers, four transmitting routes and eight dividing condensers. On the basis of method of radio wave high-frequency sensing of flow in two mutually orthogonal directions relative volumetrical content of its components is measured, by means of method of autocorrelated velocity change flow velocity is determined and with the help of Coriolis flow meter and calibration controllers mass flow and density of controlled medium is measured.

EFFECT: increase of flow rate measurement accuracy.

5 dwg

FIELD: physics, measurements.

SUBSTANCE: method and device are suggested for diagnostics of operation of pulse pipeline in technological metering device (flow metre) in technological process. Source (144) of vibration signal configured for transfer of acoustic signal along pulse pipeline (112), and receiver (146) of acoustic vibration signal from pulse pipeline are connected to technological connection element (110), through which line (112) passes. Diagnostic circuit (140) contained in technological detector (102) of metering device, on the basis of accepted acoustic vibration signal diagnoses pulse pipeline (clogging or leakage of filling liquid). Technological detector (102) comprises flow pressure detector or flow level detector and for provision of power supply it is connected to double-wire control circuit of technological process. Diagnostic circuit may be configured for self-diagnostics based on accepted acoustic signal.

EFFECT: improved reliability of technological process control due to possibility of anticipatory diagnostics of flow metre failures.

26 cl, 5 dwg

Up!