SU1441262A1 - Apparatus for measuring concentration of liquid-dissolved gas - Google Patents

Abstract

The invention relates to the field of physico-technical measurements, in particular, to devices for determining the concentration of a gas dissolved in a liquid. The chain of invention is more accurate. The device contains a measuring cuvette with a spherical recess on which a pallet is applied, a lens, a piston with cavitation elements mounted tangentially to the walls of the cuvette, shut-off valves and an electroline actuator. By moving the piston, the introduced gas is collected a predetermined number of times from the liquid in a spherical recess and the size of the gas puff is determined using a lens. 1 il.

Description

This invention relates to physicotechnical measurements.

The aim of the invention is to improve the measurement accuracy.

Figure 1 and 2 presents the scheme of the device.

The device contains a measuring cuvette 1 with a spherical recess, a piston 2, in which cavitation elements 3 are installed tangentially to the walls of the cuvette, shut-off valves 4 and 5, an electromagnetic actuator 6, -touch 7 on the outer surface of the cuvette, collecting lens 8 and communications 9.

The device works as follows.

Spill a certain amount of liquid through the cuvette 1 (from the bottom up) until the gas bubbles from the upper part of the cuvette 1 are completely removed, - which is controlled along the measuring grid (pallet) 7 through the lens 8. The shut-off valves 4 and 5 are closed and the electromagnetic drive 6 is turned on multiple movements of the piston 2 inside the cuvette 1 from the top dead center to the bottom and back are performed, and the number of movements of the piston 2 must be specified and the same for all measurements. When the piston moves from the upper dead center to the lower liquid, it flows from the lower cavity of the cuvette 1 to the upper one through the cavitation elements 3, which are installed in the piston 2, where the gas dissolved in it is released from the liquid. Since the longitudinal axes of the cavitation elements 3 (hydraulic throttles) are tangentially directed to the walls of the cuvette 1, the gas-liquid flow inside the cell 1 is twisted, which causes the separation of the gas and liquid phases. When driving a piston

n 2 from the bottom dead center to the top, the process of targeting gas from the gas-liquid stream continues.

.After the operation of the electromagnetic actuator 6, the piston 2 is stopped at the bottom dead center for a predetermined number of times. At the same time, the gas-liquid flow continues to rotate inside the cuvette 1, which causes the formation of a gas bubble in the central part of the spherical recess of the cuvette. Then, after the liquid has stopped, the dimensions of the gas bubble are measured using a pallet 7 and a lens 8, and the size of the gas bubble determines the concentration of the gas dissolved in the liquid. After that, the stop valves 4 and 5 are opened and the liquid is removed from the cuvette 1. To improve the measurement accuracy, several measurements are taken and the average result is calculated.

Claims (1)

Invention Formula  A device for determining the concentration of gas dissolved in a liquid, containing a measuring cuvette, in the upper part of which a spherical recess for fixing gas bubbles is made on its inner surface, characterized in that, in order to measure the accuracy of measurements, a piston is made inside the cuvette. - tional elements located cosrymmetrically with respect to the axis of movement of the piston, the longitudinal axes of the cavitation elements are directed tangentially to the walls of the cuvette, and on the outer surface and the cell over a spherical recess formed in a mosaic shka.gga above which converging lens is set. eight FIG. 2 - / I & -ff