SU917035A1 - Device for sampling liquid - Google Patents

Description

(54) DEVICE FOR SELECTING SAMPLES OF LIQUIDS

one

The invention relates to the sampling of materials, in particular to devices for sampling the liquid phase of suspensions.

A liquid sampling device is known, comprising a scoop-and-spoke wheel mounted vertically on a hollow shaft, BbinojTHeHHbfMH with channels connecting the scoops and a wheel with a hollow shaft 1.

The drawback of the device is that it does not allow sampling of the liquid phase of suspensions and pulps due to clogging of solid particles from the sampling ports and the sampling channels.

Closest to the present invention is a device for sampling pulp and slimes, comprising a hollow shaft with hollow sampling nozzles attached to it and a sample collection 2.

The disadvantages of this device are that a portion of the sample is drained back into the sampling tank. In addition, when sampling contaminated liquids in automatic control systems, particles of the solid phase enter the sample collection, resulting in unreliable measurement results and in violation of production technology.

The purpose of the invention is to increase the representativeness of the sample and the continuity of the process of its selection.

This goal is achieved by the fact that a device for sampling a liquid, including a hollow shaft with hollow sampling nozzles attached to it and a sample collector, is provided with a collector with a filter element and a tray.

10 nozzles are provided with plugs installed on their ends, and are made with perforations, and the internal cavity of the shaft is made with a longitudinal partition.

It is advisable to install the sampling nozzles 15 in one plane perpendicular to the shaft axis.

The drawing shows a device for sampling a liquid, a general view.

Claims (2)

The device contains a horizontal shaft 1 - the existing shaft of one of the 20 pasted agitators of the washing apparatus, inside which the partition 2 is installed. For convenience of installation, the partition 2 can be made not for the entire length of the shaft and is limited, for example, with an insert 3. Hollow sample-mounted nozzles 4, on the ends of which plugs 5 are installed. Each sampling nozzle 4 is made with perforation b, facing the direction of rotation of the nozzle. Under the end face of the shaft 1 there is a funnel of the collector 7, equipped with a filtering element 8, under which there is a tray 9 connected through an air gap to the sample collection 10. The device works as follows. As the shaft 1 rotates, the sampled portion of the nozzle 4 periodically sinks into the pulp. At the same time, due to the presence of perforation, 6, only the liquid phase of the pulp with solid particles or fibers smaller than the size of the perforation holes gets inside the sampling nozzle 4, and the particles of larger size either get lost or remain on the surface of the intake. The volume of fluid that has passed into the nozzle 4 must exceed the volume of the nozzle from the plugged end to the beginning of perforation, which determines the required sample volume. During the exit of the nozzle from the pulp, excess liquid is drained back into the washer. Upon further rotation of the shaft 1, the selected fluid flows into one of the shaft sections formed by the partition wall 2 and the insert 3, and from there into the collector funnel 7. Leaking through the collector, part of the liquid passes through the filter element 8 into the pan 9, and then drains through the funnel in the sample collection 10. The excess liquid, which is entraining solid particles and fibers from the surface of the filter element 8, flows into the washing apparatus. The collection of samples, in which fluid analyzers are installed, has an overflow port (analyzers and a port are not shown) from which the test fluid flows back into the washing apparatus. The use of the present invention as one of the elements of the automatic control, regulation and program-logic control systems will ensure uninterrupted operation of the fluid sample analyzers, obtain continuous, reliable information about the process flow and carry it out automatically. The economic effect from the introduction of the device will be 70 thousand rubles. in year. Claim 1. A liquid sampling device comprising a hollow shaft with hollow sampling nozzles fixed on it and a sample collector, characterized in that, in order to increase the representativeness of the sample and the continuity of the sampling process, it is equipped with a collector with a filter element and a tray , the sampling nozzles are provided with stoppers installed on their ends, and are made with perforations, and the internal cavity of the shaft is made with a longitudinal partition. 2. A device according to claim 1, characterized in that the sampling nozzles are located in one plane perpendicular to the axis of the shaft. Sources of information taken into account in the examination 1. The author's certificate GCCP № 630550, cl. G 01 N 1/10, 1976. 2. USSR author's certificate number 564567, cl. G 01 N 1/10, 1976.