SU1629918A1 - Device for calibrating continuity meters - Google Patents

Abstract

The invention relates to a measurement technique and can be used in the chemical, petroleum, aviation and other industries. The purpose of the invention is to improve the accuracy of calibration. The device contains a main 1 and an additional 2 pipes, a seat 3 for a graduated solid gauge 4, a bubbler 5, a level gauge tube 7 and a perforated gas separation wall 8, due to the installation of which in the place of the level gauge tube insertion in the additional gauge the graduation of the liquid in the level gauge tube when the gas in the volume of the main pipe through the bubbler. 2 hp F-chy, 2 Il.

Description

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The invention relates to a measurement technique and can be used in the chemical, petroleum, aviation and other industries.

The purpose of the invention is to improve the accuracy of calibration.

FIG. 1 shows a diagram of the device; in fig. 2 - the same in the process.

The device comprises a housing made in the form of cylindrical coaxially connected main pipe 1. with a diameter of 1 and an additional pipe 2 with a diameter of d. The main pipe 1 is equipped with a mounting space 3 for fastening the graduated continuous gauge 4. The 5 borester with gas supply means 6 is fixed on the bottom of the main pipe 1. The additional pipe 2 is equipped with a gauge tube 7 of dup diameter installed at the junction of the additional and main pipes

8 of the bottom of the gauge tube

7, a perforated gas separating partition 8 is fixed in the form of a grid with a cell size smaller than the diameter of the gas bubbles emerging. The device is also equipped with

9 delivery of the working fluid 10 and the means 11 for measuring the level of fluid in the pipes 1 and 2.

The device works as follows.

First, using the supply means 9, the device is filled with working fluid 10 up to the level of the main and additional pipes, and the means 11 measure this level H0 above the bubbler 5 (figure 1 Calculate the volume V0 occupied by the fluid in the main pipe)

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Then using a means of gas supply create a certain gas flow through the bubbler (figure 2). The gas rises and forces some of the liquid into the additional pipe 2 and the level gauge tube 7. Since the gas in the main pipe occupies a certain volume of V ° CH, this means that it will displace exactly the same volume of liquid,. in the extra pipe. 55 The displaced volume of fluid is determined by measuring the level h of the fluid in the gauge gauge 7. Complementary

The tube 2 and the level tube 7 are communicating vessels 7, therefore a single-phase liquid column in the level meter tube 7 with height h balances the gas-liquid mixture column in the additional pipe 2. In this way, the liquid occupies a volume in the additional pipe 2 equal to

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-h-, and the volume in the gage tube

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current volume of liquid Oh or. which is the same, the volume occupied by the gas,

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Since solid gauges are devices that measure a discontinuity or, equivalently, gas content (X, (i.e., gas volume Vp in volume V0 volume),

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Since the values of d,, D, and H0 are measured once during the calibration process, this formula can be represented as

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1 / d2 + d2 where K - (p2).

Calculate the gas content according to the formulas and assign this value to the calibrated continuous meter 40 values. Then the gas flow through the bubbler 5 is changed (increased or increased), the total value of h is measured, the new Oi value is calculated and assigned to the corresponding solid meter readings. To obtain the gas content (0%, the gas flow through the bubbler is stopped and the readings of the liquid 4 filled with liquid are recorded. To get the gas content of $ 100% (continuity C | 0%), the liquid is drained from the device and the readings of the empty solid 4 are recorded. an actual characteristic, i.e., the dependence of the readings of the calibrated continuous meter 4 on the gas content, nor Od.

The invention allows to reduce the size and metal consumption of the device, which is especially important when calibrating cryogenic solid gauges, to simplify the calibration process itself, since the measured variable value is only one, to simplify the calculations while simultaneously improving the accuracy of determining the gas content, to reduce the time spent on graduation, thereby increasing way the performance properties of the device

Claims (3)

1. A device for graduation of solid gauges, comprising a body in the form of cylindrical coaxially connected main and additional pipes, a bubbler with gas supply means fixed in the bottom of the main pipe, a seat for a solid meter in the cavity of the main pipe, means for supplying working fluid tube connected to the supplement five 0 Nygol pipe at the junction of the additional and main tr; 5, perforated gas separation wall, placed in the cavity of the additional pipe, and means for measuring the level of working fluid in pipes, characterized in that, in order to improve the accuracy of calibration and improve the operational capabilities of the device, perforated gas separation wall installed at the point of entry of the leveling tube into the additional pipe. 2. The device according to p. Is distinguished by the fact that the diameter of the additional pipe does not exceed the diameter of the main pipe. 3. A device according to claim 2, characterized in that the diameter of the additional pipe is equal to half the diameter of the main pipe.