Density Correction Method of Interface Type Float Type Liquid Level Gauge

A float type and liquid level gauge technology, which is applied to the correction of the density of the interface float type liquid level gauge and the field of liquid level gauge calibration, and can solve the problem that the interface float type liquid level gauge does not give a calculation formula, etc. , to achieve the effect of solving the density correction problem and the calibration problem

Active Publication Date: 2018-03-16
CHINA NAT OFFSHORE OIL CORP +1
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AI Technical Summary

Problems solved by technology

Moreover, the verification of the interface float type liquid level gauge does not give a specific calculation formula
Therefore, the currently implemented liquid level gauge verification regulations do not fully meet the current work needs.

Method used

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  • Density Correction Method of Interface Type Float Type Liquid Level Gauge
  • Density Correction Method of Interface Type Float Type Liquid Level Gauge
  • Density Correction Method of Interface Type Float Type Liquid Level Gauge

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Experimental program
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Embodiment Construction

[0029] like figure 1 As shown, the present invention adopts the following verification steps:

[0030] Step 1: Verify or calibrate the measurement standard instrument:

[0031] The main measurement standards include: electronic balances, density meters, vernier calipers, measuring cylinders, etc. for verification or calibration to ensure that the measurement standards meet the relevant requirements of the measurement range and accuracy level, and ensure that they are qualified and effective;

[0032] Step 2: Weigh out the mass m (kg) of the floating ball with an electronic balance;

[0033] The third step: measure the diameter D (m) of the cylindrical part of the floating ball with a vernier caliper, and the radius R can be obtained after calculation;

[0034] The fourth step: measure the volume V (cubic meter) of the floating ball with a measuring cylinder;

[0035] Step 5: Use a density meter to measure the density ρ of the calibration medium water w (kg per cubic meter)...

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Abstract

A method for correcting the density of an interface float type liquid level gauge adopts the following verification steps: 1: verify or calibrate the measuring standard instrument; 2: measure the mass of the float; 3: measure the float cylinder The diameter of the part; four: measure the volume of the floating ball; five: measure the density of the calibration medium water; six: list the weight of the floating ball and the buoyancy formula in the two media; seven: give the regular cylinder Volume formula; 8: Deduce the height of the floating ball immersed in the lower medium; 9: Deduce the theoretical height of the floating ball immersed in the calibration medium water: 10: Calculate the height difference of the float type liquid level meter with water as the medium calibration interface, namely Density correction value Δh. The invention only needs to measure the mass of the floating ball, the diameter of the cylindrical part of the floating ball, the volume of the floating ball and the density of water, and then use the density correction value formula to calculate the density correction value, and solve the problem of the interface type floating ball liquid level gauge. Density correction and calibration issues.

Description

technical field [0001] The invention relates to a calibration method for a liquid level gauge, in particular to a method for correcting the density of an interface type float type liquid level gauge when water is used as a medium for calibration. It belongs to the field of liquid level meter measurement. Background technique [0002] At present, more than 90% of the liquid level gauges used in the offshore oil platform use the float type level gauge. The regulations on which the floating ball level gauge is calibrated are the "JJG971-2002" level gauge calibration regulations. This regulation has been implemented for more than 10 years since 2002, and the content covers almost all the calibration of the level gauge, including: buoyancy Type level gauge, float type level gauge, pressure type level gauge, ultrasonic microwave type level gauge, gamma ray type level gauge, capacitive level gauge, conductivity type level gauge, etc. Among them, only the error correction formula ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F25/00
Inventor 张翼飞杨炳发张传涛孙小东宋来刚宋桂彬任春杰
Owner CHINA NAT OFFSHORE OIL CORP
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