SU890143A1 - Piezometric density meter - Google Patents

Description

I

The invention relates to analytical instrumentation and can be used in the mining, chemical and other industries.

A density meter is known that contains the immersion body, a vessel with a reference liquid, connecting tubes and a recording device. The disadvantage of it is the low reliability of measurements when the level of the controlled liquid fluctuates.

A hydrostatic densimeter is known, containing two measuring tubes filled with the liquid under study and lowered into it at different depths and reporting using adjustable chokes with additional tanks 2.

A disadvantage of the known densitometer is the low reliability of measurements of heterogeneous mixtures.

The aim of the invention is to increase the reliability and accuracy of the instrument readings.

This goal is achieved by the fact that, in a densitometer containing two measuring tubes filled with a live bone, the lower limbs are installed. with the control cavity through the elastic walls, and the cavities of the upper ends of the tubes are connected to the atmosphere, the lateral branches of each tube are made at equal distances from the lower ends of the tubes and connected to the differential pressure gauge.

15

The drawing shows the proposed densitometer.

The density meter consists of two identical tubes 1 with one pinned into them at the same level, counting from

20 of the end, side 1 and outlets 2, the upper part of the tubes is connected to the atmosphere on the lower part of the elastic partitions separating the cavity of the tubes from the measuring cavity 3; with a recording device 7.

Densitometer works as follows.

The measuring tubes 1 are immersed at varying depths in a controlled environment. Through plastic partitions 3 and side branches 2, the pressure of the controlled medium is measured by a differential pressure gauge 6. The differential pressure on the differential pressure gauge depends on the height of the liquid column in the measuring tubes, as well as on the difference in depth

immersion measuring tubes and

is calculated:

dr. MiTiii

Ti- tii

 . s-in

Where

... UOGT

-

y, is the volume of liquid sucked in

plastic rebrod; a is the acceleration of free fall; o- - density controlled red 1

 immersion depth of the measuring tube; C - model of elasticity of elastic ne

partitions;

5 is the cross-sectional area of the measuring tubes. Thus, the pressure difference applied to the measuring meter,

90143. four

directly proportional to the density / 1 of the measured medium and does not depend on the level fluctuations, but depends on the difference in the immersion depths of the piezometric tubes, and by changing the constant values included in the proportionality coefficient K, one can easily achieve the required sensitivity and accuracy of the instrument readings, And the pressure oscillations arising due to the inconsistency of the level of the medium are smoothed built into the lateral ones. bends diffraction throttle mi 4 ..

Claims (2)

1. The author's certificate of the USSR (518689, class G 01 N 9/00, 1975. 2. USSR author's certificate No. G 01 N 9/26, 1978 Intotype.