SU393613A1 - DEVICE FOR DETERMINING DISPERSION SOUZHI - Google Patents

Description

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The invention relates to the production of carbon black and can be used in the chemical industry.

A known instrument for determining the dispersion of carbon black has an illuminator, an optical trap, a photodetector, a comparison circuit, and a brightness regulator for the luminous flux.

Sample preparation in it is carried out in a separate device from the dispersion meter, resulting in additional measurement errors due to inaccuracy of the sample installation in the measuring instrument and non-identity preparation of the sample surface.

The purpose of the invention is to eliminate this drawback.

This is achieved by the fact that the forming surface is made in the form of a light filter rigidly fixed in the optical block of the device, which allows the preparation of the sample directly in the measuring device.

The pressure required for the carbon black sample is kept constant during the measurement process by the removable carbon black seal assembly.

The preparation of the sample: this is carried out in a removable cuvette with two external conical surfaces: the bottom one for cerate the cell in the device, and the top one for centering the cell with the soot seal.

After measuring the cuvette together with the sample, the soot in the form of a tablet is easily and quickly removed from the device. In order to eliminate friction caused by piston sticking during the compaction of soot, the node forming a surface has a device for monitoring soot compression wall, which is in direct contact with the forming surface.

FIG. 1 shows schematically a sample preparation unit; in fig. Figure 2 shows the opto-electrical circuit of the device.

A forming surface 2, made in the form of a light filter, is fixed on the housing / optical unit. The removable cuvette 3 is mounted with the lower cone into the counter cone of the upper panel of the optical unit. The soot 4 is poured into the removable cuvette. The soot is compressed due to the removable seal assembly 5, at the root of which is placed a piston 6 with a device 7 that moves it and creates pressure on the soot. As device 7 it may be

for example, use screw or hydraulic press. The pressure required to form the surface of the sample is fixed by means of a device controlling the degree of compression of soot 8 installed below the forming surface. The seal assembly is fastened with clasps 9 to the body of the optical unit. The device consists of two electronic and optical blocks. The optical unit consists of the optical camera 10, the optical trap / ;, the illuminator unit 12, 13, the photodetector unit 14, 15. The electronic unit consists of the comparison unit 16, ul-organ 17, actuator 18, luminance regulator 19, reading device 20. The device operates as follows. Removable cuvette 3 set lower conical surface on: body / optical unit. A light portion of dusty soot 4 is poured into a removable cuvette by a light filter 2. Then a removable soot sealing unit is installed on the upper xsnus surface of the removable cuvette, and the body is attached to the optical block case 1 by means of a device 7. Upon reaching the required pressure (1 kgf / cm), the congrol unit of the degree of compression of soot is triggered, after which the electronic circuit is turned on, and the reading device 20 outputs the measurement result, then the electronic circuit is output in one position. Thereafter, the gap 6 is brought to the initial position by means of the device; 7, remove the soot seal assembly, remove the removable cuvette 3 and remove the soot 4 from it, and clean the light filter with a brush. This completes the analysis and the device is ready for a new measurement. Subject of the invention. A device for determining the dispersion of carbon black containing an illuminator, an optical trap, a photodetector, a comparison circuit, a luminous flux regis tor, a reading device, characterized in in the form of a light filter, above which a removable soot sealing unit and a removable cuvette with two external conical surfaces are installed, while a control device is installed under the forming surface the degree of compression of carbon black that is in direct contact with the forming surface.

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