SU989354A1 - Device for preparing sample for nuclear physical analysis - Google Patents

Description

The invention relates to the preparation of samples of bulk materials, to devices for nuclear physical analysis of a substance, and to be used in the analysis of bulk materials of heterogeneous composition, for example crushed: geological samples.

A device for preparing samples for analysis is known, containing a cuvette movably mounted in guides and equipped with a device for metered loading and compacted with a device tl.

The disadvantage of this device is the small volume of the cuvette, as a result of which, when analyzing material, significant masses are needed to increase the accuracy of the research. It is necessary to use a large number of weights.

Closest to the present invention, there is a device for preparing a sample for a nuclear physical analysis of a beam of material comprising a cuvette, a sampling device and a sensor. h

The material to be analyzed is poured into the cuvette in an even layer, and to eliminate the effect of material heterogeneity, the measurement is performed on twelve points evenly spaced across the area: the cuvette. For this purpose, the analyzing sensor is sequentially installed under each point and a readout is taken. The results of measurements at the points are averaged further by C 2.

However, this device is characterized by low measurement performance due to the need for time consuming to install the sensor on the measurement points in series, as well as insufficient accuracy due to the limited number of measurements.

The purpose of the invention is to show the performance and accuracy of the nucleus of the physical analysis of heterogeneous, according to the composition of materials.

Goal set

20 by the fact that in the device for preparing a sample for a nuclear physical analysis containing a cuvette, a sampling device and a sensor, a cuvette. straightened in the form of an annular gutter,.

25 mounted rotatably around a vertical axis. The projection fixture is made in the form of a bunker mounted in a cell, the device is equipped with a lever, one end of which is connected to

sensor, and the other is provided with a counterweight, ..

In addition, the chute is equipped with a horizontal bar, a sleeve mounted on it, an engine and a belt drive.

The counterweight is provided with a fixed screw.

The use of such a device | makes it possible to sample samples of bulk materials with the same accuracy during the entire process. The drawing shows the device, a general view.

The device includes an engine 1, a belt drive 2, a sleeve 3, a horizontal bar 4, with a cuvette 5 fixed on it, a hopper 6 placed above the cuvette, a lever 7 fixed on the axis, a counterweight 8 and a sensor

9, fixed at opposite ends of the lever 7, and the locking screw

10. In bunker 6 and cuvette 5 is placed. Analyzing the material 11.

The device works as follows.

. The material being analyzed falls asleep into the hopper 6 and a counterweight 8 is placed on the material surface, which bounces the sensor 9 due to its own weight and the weight of the lever arm 7. Then the counterweight 8 is fixed to the lever 7 using screw 1C; so that the sensor is at a certain height from the bottom of the cuvee you are 5. When the engine 1 is turned, rotation through the belt drive 2, plug 3 and bar 4 is transferred to the cuvette 5 The material then enters the cuvette from the bunker 6. The rotational speed of the cuvette is selected in such a way that the material is loaded from the bunker into the cuvette during one revolution of the cuvette by a layer whose thickness is equal to the depth of the method of nuclear physical analysis. Due to this, all material is examined and high reliability of the analysis results is achieved. As the material level decreases in the bunker, the counterweight S lowers.

the sensor 9 is raised, with the result that the gap between the sensor and the surface of the analyzed material remains unchanged. This eliminates analysis errors due to the inconvenience of the distance from the sensor to the sample. The number of revolutions of the cell made over the entire measurement cycle depends on the volume of the sample material being analyzed.

When using the proposed device, the measurement accuracy is increased by 1.5-2 times with an increase in productivity by 2-3 times compared with the prototype.

Claims (3)

1. Device, for preparation. Samples for sod-physical analysis, containing a cuvette, sample attachment and sensor, characterized in that, in order to improve the performance and accuracy of the sod-physical analysis of heterogeneous materials, the cell is made in the form of an annular groove mounted for rotation around a vertical axis, The device is made in the form of a bunker mounted above the cuvette, the device is equipped with a lever, one end of which is connected to the sensor, and the other is equipped with a counterweight. 2. The device according to claim 1, about tl and which is that the chute is sacked by a horizontal bar, a sleeve mounted on it, an engine 1 belt drive. 3. The device according to paragraphs. 1 and 2, characterized in that the counterweight is provided with a fixing screw. Sources of information taken into account in the examination 1. USSR author's certificate according to the application 3008281, cl G01 N 1/00, 1980. 2.Gamma methods in ore, geology. Ed. A.P. Ochkura. L., Nedra, 1976, p. 333