SU490001A1 - Submersible conductometric concentration meter - Google Patents

Description

one

The invention relates to devices for automatically controlling the content of the useful component in solutions or suspensions by their electrical conductivity.

A conductivity end metratometer with a metal body without an insulating coating is known.

IRI using such a sensor as a submersible occurs the phenomenon of polarization of the hull. The resistance of the polarization layer is comparable to the resistance of a liquid coil formed from a controlled medium (solution, suspension), which significantly reduces the measurement accuracy.

These drawbacks are eliminated by creating a concentrator with a metal body without a coating, the insulating tube of the measuring channel of which contains free ends protruding beyond the limits of the body. Conical insulating nozzles are installed at the free ends of the pipe. Nozzles form an annular gap with the housing. The tube has a calibrated bore and length.

FIG. 1 shows a plot of a concentration meter; in fig. 2 - distribution of resistances of sections of the liquid coil from the controlled medium and the polarization layer of the body.

The concentrator is arranged as follows.

In the metal case 1 there are toroidal transformers 2, 3, one -

power, the other - measuring. The measuring channel 4 is formed by an insulating tube that contains free ends 5, 6 protruding beyond the limits of the housing. Conical nozzles 7, 8 are installed at the pipe ends, which form annular gaps 9, 10 with housing 1.

The concentrator is immersed in a controlled conductive medium. Surrounding it and filling the measuring pot, the medium forms a liquid coil, the current in which is proportional to the monitored component. The liquid current loop connects the power and instrument transformers. The output of the latter generates a signal proportional to the current of the coil, and, therefore, depending on the electrical resistivity of the medium.

Improving the accuracy of measuring the content of a component in a controlled environment

The proposed concentrometer is provided with an increase in the accuracy of measurement of the resistivity of the medium. Improving the accuracy of measuring the resistance of the medium is achieved by reducing the fractional share of the resistance of the polarization of the metal body in general coripoTurijieniiii 11; The resistance Ui; iKocTiioro of the coil eK / i comes out of the resistances of a number of sections (see Fig. 2): / 1 - resistance cpe; U) i inside the isolate of the medium; A Кз is the resistance of the medium sections from the pipe ends to the open metallic coriaea, R :, sleep ;;;; the induction of the metallicization of the metallic coruea, / 5 - the resistance of the parts: a c1), r aralleic root. Summarios Soirot and-, le; n; e R is expressed by the formula:

/../, + /, + /, + -1-

Coherence R, during the measurement is not stable and is a source of preiolitial power.

In the proposed concentration meter, the total error is reduced to tenths of a percent due to a significant reduction in the fractional share in the overall resistance R. The reduction in the fractional fraction of the resistance of the hull polarization is due to the fact that, firstly, the Yunpa pipe isolator limits of coryuea. As a result, the resistance R has increased significantly, resistances have formed,. Secondly, the conical nozzles increased the path of the controlled environment and with it

co-motivate R: Third-1 :,.; S1. the gaps between the nozzles and metaclusters::: KopnyccjM increased (1p; T1 | uk) liOi epMiocvi, Cornus, reducing the nlottope: current and inconsistency /.4- case polarization.

The tip nozzles give the coicitratometer a streamlined shape, improving its hydrodiamine properties.

Repair of a co-nitratomer) st, since it boils down to replacing the insulating pipe, which is the most coherent element of the device. The pipe has calibrated orifices and, which frees the Koitsitrato.mer from the bypass of the 1–5 bridge of liquid-liquid 1 radiography.

PREDIME AND 3 ABOUT

Immersion conductivity meter with metallic core Gus, inside)

which has been removed; toroidal enlow measuring transformers and measuring channel in the conductor; 1e of an insulating tube, characterized in that, with the effect of reducing the measurement error network, in;

polarization of the coruyea, the free ends of the isolators of the measuring tube of the measuring channel are wavelengths that protrude beyond the limits of the cornus, and on them are installed conical i-arms from the insulated GLaterial. forming annular gaps with corus