RU2006124625A

RU2006124625A - METHOD OF GRADING RESERVOIRS

Info

Publication number: RU2006124625A
Application number: RU2006124625/28A
Authority: RU
Inventors: Владимир Иванович Кабанов (RU); Владимир Иванович Кабанов; Олег Владиславович Молчанов (RU); Олег Владиславович Молчанов; Виктор Константинович Науменко (RU); Виктор Константинович Науменко; Максим Славкович Бобак (RU); Максим Славкович Бобак; Сергей Васильевич Сорока (RU); Сергей Васильевич Сорока; Сергей Викторович Старый (RU); Сергей Викторович Старый
Priority date: 2006-07-11
Filing date: 2006-07-11
Publication date: 2008-01-20
Also published as: RU2327118C2

Claims

A method of calibrating reservoirs, including continuous filling of a reservoir with liquid through a liquid quantity counter, the error of which is determined before graduation begins for a given filling rate, measuring the level, volume, temperature of the liquid being poured at several filling levels, the angle of inclination of the reservoir before graduation and after each dose filling cycle liquid, hydrostatic pressure and density of the liquid to be poured after each cycle of the gulf of the liquid dose and the subsequent formation of graduated hydrochloric table with the meter error corrections for the deviation, the deformation of the hydrostatic pressure and the linear expansion of the tank of filled liquid temperature depending on the material

H _j ± ΔH ₁ ± ΔH ₂ = f (V _j ± Δσ),

where H _j is the liquid level in the tank after performing the j-th cycle of the gulf of the dose of liquid, m;

ΔH ₁ - correction to the level associated with a change in the angle of inclination of the tank, m;

where K is the coefficient of the type of reservoir, depending on its geometric characteristics, m (passport data);

α _j - the angle of inclination of the tank after performing the j-th cycle of the gulf of the dose of liquid, deg (sensor readings);

d - diameter of the tank, m (passport data);

ΔH ₂ - correction to the level associated with the deformation of the tank from the hydrostatic pressure of the column of liquid poured into the tank, m,

where P _rj is the hydrostatic pressure of the liquid column, measured after the jth cycle of the fluid dose, Pa (sensor readings);

- fluid density at the measured temperature, kg / m ³ (sensor readings);

g - gravity acceleration, m / s ² (reference data);

V _j is the volume of liquid after performing the j-th cycle of the gulf of the dose of liquid, m ³ (liquid meter readings);

Δσ is the absolute error of the liquid meter, measured before graduation, m ³ ,

the correction ΔH _{1 is} taken into account when the condition

α ₀ -α _j> 0,5 ± Δα, _etc.,

where α ₀ is the angle of inclination of the tank before the start of the graduation process, deg;

α _j - the angle of inclination of the tank after completing the j-th cycle of the gulf of the dose of liquid, deg;

Δα _etc. - absolute accuracy of the sensor measuring the tilt angle, deg (passport)

and the correction ΔH ₂ - when the condition

H _{j + 1} - liquid level in the tank after performing the next cycle of the gulf of the dose of liquid, m;

Δσ _H - absolute error of level measurement, m;

V _j - the volume of liquid after the j-th cycle of the gulf of a dose of liquid, m ³ ;

V _{j + 1} - the volume of liquid after performing the next cycle of the gulf of a dose of liquid, m ³ ;

K is the coefficient of the type of tank depending on its geometric dimensions (for example, the coefficient K for the tank R-20 = 2.2);

31.25 and 2.24 - constant coefficients obtained experimentally,

characterized in that before starting the calibration, the reference liquid level in the tank is measured, and a bucket of a given mass and area is used as a level meter, which is connected to the buoy weight transducer into an electrical signal, the average value of the five electrical signals of the transducer without the buoy is recorded, the average value of of five electrical signals of the transducer with a buoy, and after each cycle of the gulf of a liquid dose, the current value of the electric signal of the transducer is additionally measured with liquid buoy, and the liquid level in the tank after the j-th cycle of the gulf of the dose dose V _j ± Δσ of the liquid is determined by the following relationship

Н ₀ - reference level of liquid in the tank (distance from the bottom of the tank to the bottom edge of the buoy);

m is the mass of the buoy;

ρ is the fluid density;

S is the cross-sectional area of the buoy;

U is the average value of the sensor when measuring the level with the buoy lowered into the liquid;

U _A is the average value of the weight sensor with a displacer (without liquid);

U ₀ - the average value of the readings of the weight sensor without buoy;

H _j - liquid level in the tank after completing the j-th cycle of the gulf of a dose of liquid.