SU584228A1 - Rotary viscosimeter - Google Patents

Description

one

The invention relates to the field of viscometry of liquids and can be used in measuring the rheological properties of the particles, which form them {}) and the suspensions.

A rotanion viscometer is known, the I1II state consists of a body, two cones (internal and BHeninero), a thermostat, and an injection system 1. This viscometer does not provide a determination of the viscosity of disperse systems.

A rotational viscometer is known for measuring the rheological properties of disler viscous systems of high viscosity, consisting of two cylinders — an internal, and one silo side measuring surface), an external one, made in the form of two coaxially arranged glasses with perforated side surfaces 2.

The disadvantage of this viscometer is that, in order to measure the rheological properties of the sediments, it is necessary to pre-filter the suntheum on the filter with subsequent removal of sediment from the filtering material into the measuring unit of the viscometer. In this case, the structure of the sediment is disturbed and the measured properties do not correspond to reality.

In order to improve the accuracy of the study of the rheological properties of sediments, in the proposed viscometer on the lateral surface

The internal cylinder is fixed to the filter, and the internal volume of this cylinder is provided with an external pipe installed in the last cover.

The drawing depicts the described measuring unit, which consists of an internal hollow cylinder 1, the side wall of which has a uniformly perforated surface 2, on which a filtering material 3, such as a finely meshed copper mesh, is located on the nylon 1 lid of the filtrate , an outer cylinder 5 with a perforated side surface, a thermostatic cup 6, having a flush side} S surface 7. Between the pilN1ND1ram.n 1 and 5 there is a firing gap 8.

Work is carried out in the following sequence. Thermostat cup 6 is removed. The shtuner 4 is connected to the pipeline, leading to the filtrate collector. Cylinders 1 and 5 are immersed in a slurry tank. The necessary vacuum is created in the filtrate collector or the pressure in the suspension tank to start the filtration process. The holes in the side surface of the cylinder 5 freely pass the slurry to the filter material 3 mounted on a uniformly unperforated top 2 cylinders 1. The particles of the suspension are retained on the surface of the filter material 3, forming a precipitate that fills the gap 8 between cylinders 1 and 5 The precipitate obtained on filter material 3 has the same rheological properties as the precipitate obtained by filtering suspension under production conditions. After filling the entire gap 8 between cylinders I and 5 with sediment, filtering is stopped, fitting 4 is disconnected from the filtrate collection pipe, thermostatic cup 6, having a continuous side surface 7, is put on the perforated side surface of the outer cylinder 5 so that during viscometrication the sediment does not flow through a hole in its side perforated surface and is connected to a thermostat. The flow of the thermostatic fluid, which flows inside the thermostatic stack 6, heats the sediment in the gap 8 to the required temperature.

Thereafter, a viscometer of the precipitate obtained by filtering in the gap 8 is carried out.

Formula is invented and

A rotational viscometer containing two coaxially mounted cylinders with a perforated surface, an actuator and a thermostating device, characterized in that, in order to improve the accuracy of studying the rheological properties of sediments, a filter is fixed on the lateral surface of the inner cylinder, and the upper end of the inner cylinder is provided with a spout.

Sources of information taken into account in the examination

1. USSR Author's Certificate Afb 193779 G 01N 11/14, 1966.

2. USSR Author's Certificate No. 241795 G 01N 11/14, 1969.

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