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Density correcting method for interface floating ball type liquid level meter

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

Active Publication Date: 2015-11-18
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 correcting method for interface floating ball type liquid level meter
  • Density correcting method for interface floating ball type liquid level meter
  • Density correcting method for interface floating ball type liquid level meter

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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] The first step: verify or calibrate the measuring 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 valid;

[0032] The second step: weigh the mass m (kilogram) of the floating ball through an electronic balance;

[0033] Step 3: Use a vernier caliper to measure the diameter D (meter) of the cylindrical part of the floating ball, and calculate the radius R;

[0034] Step 4: Measure the volume V (cubic meters) of the float with a graduated cylinder;

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

[0036] Step 6: List t...

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Abstract

A density correcting method for an interface floating ball type liquid level meter comprises the following verifying steps that firstly, a measurement standard device is verified or calibrated; secondly, the mass of a floating ball is weighed; thirdly, the diameter of the cylindrical part of the floating ball is measured; fourthly, the size of the floating ball is measured; fifthly, the density of verification medium water is measured; sixthly, the weight of the floating ball and a buoyancy formula in two media are listed; seventhly, a cubature formula of a regular cylinder is given; eighthly, the height of the part, immersing into the lower layer medium, of the floating ball is derived; ninthly, the theoretical height of the part, immersing into the verification medium water, of the floating ball is derived; tenthly, the height difference generated when water is used as the medium for verifying the interface floating ball type liquid level meter is calculated, and the height difference is the density correcting value delta h. According to the density correcting method, the density correcting value can be worked out by measuring 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 through the density correcting value formula, and the purposes of density correction and verification of the interface floating ball type liquid level meter are achieved.

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 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 on offshore oil platforms use float type liquid level gauges. The procedure for verifying the float type liquid level gauge is "JJG971-2002" liquid level gauge verification regulation. This regulation has been implemented for more than 10 years since 2002. The content includes the verification of almost all liquid level gauges, including: buoyancy Type liquid level gauge, float type liquid level gauge, pressure type liquid level gauge, ultrasonic microwave liquid level gauge, gamma ray type liquid level gauge, capacitive liquid level gauge, conductivity type liquid level gauge, etc. Among th...

Claims

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Application Information

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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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