SU626419A1 - Liquid flow-rate measuring device - Google Patents

Description

vessels that have upper drainage. depends on the height of the liquid layer above the drain thresholds. This dependence is determined by the equation

R

, -2s / g, g

where V is the velocity of the ascending fluid flow, m;

R - ne, ri.Meter of the slip threshold, m;

F is the transverse cross-sectional area of the upstream fluid flow, square. m;

g 9.81 m / s — the acceleration of the earth’s ground speed;

/ g - height of the layer over the drain threshold, m.

From this formula, it can be seen that the determined speed of the upward flow of the fluid reduces to measuring the height of the fluid layer by means of a drain. The electrodes are immersed in the same depth in the top layer of the pulp leaving for drainage. As is well known from the theory; AI electrolytic dissociation, metal electrodes, immersed in a liquid, form an electrical capacitance between them. The capacity of such an electrolytic capacitor depends on the contact of the electrodes with the liquid and the electrical properties of the liquid itself. In the sensor, the electrodes / and 5 form, respectively, electrical capacitances GI and Ca with grounded electrode 2.

To realize the dependence of the electrical capacitance of measuring cells formed by pairs of electrodes 1, 2, 2, 3, on the speed of the upward fluid flow, the configuration of the plate electrodes / and 3 is nonlinear but the depth of the bottom in the liquid tray.

The speed sensor works next time) azo-m.

As the drain level increases, an inductive-capacitive bridge containing constant inductances 5, 6} 1 em. Capacitance between electrodes 2, 3, and 2} changes the impedance due to a change in capacitance. The occurrence of the error signal through the transformer 7 and the winding} / 10 and the tuner on the divider / 7, and then - the instrument .14, which proves the speed of the ascending fluid flow.

From the measurement of the speed of the upward flow and in the thickening devices, and for example, magnetic deslamators, the proposed device allows us to create a system for automatic unrapping of the thickener. As a result, it is possible to stabilize the nozzles of sgundenNYa and demineralized and iron ore concentrate, thereby improving the quality of the concentrate and reducing its loss in the tailing product.

Formulala 3 about b) e te

Claims (2)

1. A device for measuring "" and a flow rate of a container comprising a housing, a sensor made in the form of parallel arranged power electrodes, a bridge measuring circuit, a sensitivity regulator and a recorder, characterized in that, in order to increase the ACCURACY of the measurement The speeds of the upward flow of fluid, the plates of the extreme electrodes are made in the form of parabolas and are set with their vertices down, while in the case with the drain the threshold the area of the middle electrode is larger than the edge, and the radius of the latter is 3: 1. 2. The device according to claim 1, characterized by the fact that the sensor is oriented with a smaller electrode to the drain threshold of the housing.