SU1057810A1 - Liquid density meter - Google Patents

Abstract

A LIQUID TENSION, containing the capacity of an explorable liquid, fixed weight, sucker for a reference liquid with a float immersed in it, characterized in that, in order to accelerate the measurement process, the vessel of the reference liquid is made up of vice concentric cylinders between which a float of an annular shape, rigidly connected with a pointer indicator, is placed to the cohort, a weight with a fixed weight with a label applied to it, and the capacity of the studied liquid has on the side surface rhnosti two horizontal tag S and is provided with means for its displacements (A audio adjustment.

Description

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S The invention relates to a measurement instrumentation technique, namely, devices for measuring and controlling the density of various liquids used in the practice of mecii and biochemical measurements, but can also be used in other fields of science and technology where measurement is necessary. Density of fluid in small volumes with high accuracy. A constant-mass areometer is known, the most stable symmetric ornositel of the longitudinal axis is the fixed telo, which consists of a hollow body of a cylindrical or vortex-shaped form and rigidly attached to it in the upper part of the rod. The lower part of the hydrometer is filled with ballast, preassigned for lowering the center of gravity, so that when the hydrometer is immersed in the liquid, the hydrometer floats in a strictly vertical position and is in steady equilibrium. The disadvantage of this hydrometer is the impossibility of measuring the density of the fluid with it. small volumes and ease of use, due to the fact that the float system nachocytes is not transient in the test liquid, which can be both a.gres (Noah, and unpleasant thermal contact). with the laboratories of the laboratory technician, about the meteorological measurements. The closest technical solution to the proposed is a density meter, a liquid containing the capacity of the studied fluid, a load with fy: a weight, a vessel of reference liquid with a float immersed in it, However such a density meter characterizes with the sosku design of the southerl of the allegiance, the complexity of the work, due to the need for additional operations. The purpose of the invention is to fix the measurement process. This goal is achieved by the fact that in a densitometer of a liquid containing the 5th bone of the test liquid, a load with a fixed weight, a vessel for the reference liquid with a bench loaded into it, a vessel with the reference liquid is spotted in the form of two concentrically arranged cylindrical surfaces with PVC between them is a float of ko; it.tsev.oh form, rigidly connected with a pointer indicator, to which the weight is fixed with a fixed weight with a label applied to it, and has a mixture with the liquid to be investigated, has on the lateral heat exchange These are two horizontal marks and are equipped with a means for moving it in high places. FIG. . shows a general diagram of the flat gauge, side view; in fig. 2 "- Se- cheeky A-A in FIG. 1. A pinchable densitometer consists of Koprtyca 1, a vessel 2 mounted on the rotor, filled with a reference liquid, such as distilled water, Sosuts 2 is objaculated in two concentric, arranged cylinders: an external 3 internal 4. Inside the vessel of trays, a float 5 having a ring shape. On the fit. Paragraph 2 of the pcc designates another possible variant of the constructive execution of the float in the vice of three or more bodies, a cylindrical form. In the lower part, the float 5 is equipped with a ballast weight 6, which requires the necessary flotation of the float SYSTEM. The rods 7 of the float 5 have a small diameter and & The amphibious part is attached to a common bracket 8, made in a vice cross, to the central part of which on a flexible thread 9 is hung a tared load 1O, fitted in its middle part with a label 11 in the vice horizontal lily. The load 10 is completely immersed in the IS: the liquid that is poured into the pro5) capacitance 12, on which two separate horizontal markings 13 are also placed in its decisive part 13. The capacitance 12 is installed on the movable table 14, which can be moved upwards with the micrometer screw 15 and downward on the parapets 16. The set screws 17 on the base 18 serve to set the meter in a strictly upright position, and the scales 19 and movable IO-2O mounted on the bracket 8. Service: read-out category. From above, the densitometer is closed with a cap 21 kz. The density meter works the following way. Capacity 12, with the inspected zhitskoe poured into it, is mounted on the base table 14 and the rotation of the screw 15 color the bottom of the calibrated load 10 to fully immerse it in the test liquid. At the same time, if the liquid under investigation is more desirable than the reference one, -s-P t effect on. As a matter of additional pressing force (-p) ":, V gr

310

Due to the high density of the examined fluid compared to the stage, the float (floats) 5, which is in its original position in the lower part of the vessel 2 (as shown in Fig. 1), will begin to float. Move the table 14 upwards to the position where the aforementioned force pushes the force due to the difference in density of the test and reference fluids (p; j) of the ERA equilibrated with the additional force of gravity and XhS caused by the part of the rods 7 that leave the reference liquid when you put me on the float 5. If the fluid is easier to reference, i.e. -. After the increase in excess gravity (P), the float 5, which in this case should be in the upper initial position, will begin to be immersed in the test liquid. Lower table 14, achieve a position in which excess gravity, due to the lower density of the liquid under test, is balanced by the pushing force

5e: In this case, the mark 11 on the load 10 should be between the marks 13, applied to the container 12 with the liquid under test.

In both cases, the difference is p. - Rsisg) is defined by the formula

,

g p 1rzh „-r with, 1 vrp

gay pjj. - density of standard Zhitskostn Rzhp density of the investigated Vrp- volume of tarryvane cargo; h is the height of raising or lowering the float 5;

ten,

Sf-- total cross-section surface area of the rods 7 of the float 5

I

The density of the test liquid is judged by the indication of index 20 on one of 19 (Fig. 1) —the right one, if the test liquid is heavier, or the left one, if the liquid is studied is lighter than the reference one. If necessary, control or calibrate the scale of the proposed densitometer. Capacity 12 is filled with the same standard liquid that is poured into intermediate vessel 2 and the calibrated weight 10 is immersed in it. At that, the movable index 20 installed on the bracket 8 of the float 5 must be installed with at the zero mark of one of the scales 19 (the right one, if the population meter is calibrated for heavier liquids, the meme is standard, and the left meter, if the meter is calibrated for liquids lighter than the standard one). Then replacing successively the replaceable load 1O with a smaller (larger) weight, calibrates the scale of the densitometer in the entire measurement range.

The effect of temperature fluctuations around the environment on the measurement accuracy is almost impossible, since sas measurements are relative.

The use of the proposed device provides a measurement of the density in small volumes of a specialized fluid (up to 3--5 cm) and high accuracy (not lr +0,0001 g / cm). In addition, the densitometer is characterized by versatility, since it allows the density of liquids to be determined both heavier and easier to use and easy to use (the direct contact of the test liquid with the hands of the laboratory worker is excluded).

Claims (1)

Densitometer liquid containing container tslya sample liquid, the weight of fixed weight vessel tslya reference liquid immersed therein a float, characterized in that ^- in order to speed the measurement process vessel tslya reference liquid is in the vice two konient_ ary disposed cylinders, between by which a ring-shaped float is placed, rigidly connected to a dial indicator, to which a load with a fixed weight with a mark applied on it is suspended, and the tank for the studied liquid has on the side surface and two horizontal marks and is provided with means tslya its displacement in height. > 10578.10