SU721709A1 - Device for investigating structure of porous materials - Google Patents

Description

one

The invention relates to the field of studying the structure of porous materials, mainly geological samples, and can also be used in the leather, paper, textile, chemical industries, in the building materials industry.

Devices for studying the structure of porous materials by the medium displacement method are known, comprising a chamber for placing a sample, channels for supplying and discharging the displaced medium, and a unit for measuring the optical density of the medium in time 1.

The closest technical solution to the present invention is a device for studying the structure of porous materials, comprising a sealed case with a chamber for placing a sample, separated from the case by a space filled with pressurized fluid, channels for supplying and discharging the medium being expelled coaxially with the chamber, and located outside the case a measuring unit communicating with a tap 2.

However, this device is not sufficiently accurate measurement after

The fact that the outlet channel has a significant volume, resulting in the displacement of the displaced medium with the existing portions.

The aim of the invention is to increase

accuracy of the research.

The goal is achieved by the fact that in a device for examining the structure of materials, comprising a sealed housing with a chamber for placing a sample separated from the housing by a space filled with pressurized fluid, channels for inlet and outlet of the displaced medium, coaxial with the chamber, located outside the housing, the measuring unit communicates with a tap channel, the tap channel is in the form

capillary ditch

The drawing shows a diagram of a constructive implementation of the proposed device.

The device includes a housing 1, made in the form of a thick-walled cylindrical

castings. The housing axis includes a channel for supplying the displaced medium, made in the form of a nozzle 2, a chamber 3 for accommodating the sample under test, which is fitted with a heat-resistant rubber cuff 4, which serves as a waterproofing of the side surface of the sample, and a channel for removing the displaced medium made the form of a beam of capillaries 5 embedded in nozzle 6. At the bottom of nozzle 6, a measuring unit 7 is mounted, containing an illuminator 8 and a photocell 9. Cornus stands on a tripod 10 on the pedestal, covering the upper ring 11 whisker kryschke 1. At the bottom 12 of the measuring unit 7 is provided with an opening 13 for the medium flow. Between the bundle of capillaries 5 and the chamber 3 for placing the sample, a perforated i4 metal plate is laid on the cut-off of the nozzle b. On the outer side, the nozzle 2 has a threaded cap 15 with a fitting with a valve 16. In the lid 17 of the housing 1 there is also an eccentric nozzle 18 for supplying oil under pressure up to 1000 atm. to simulate rock pressure. To simulate the reservoir temperature, there is an electric heater (not shown).

The device works as follows.

Through the inner part of the cuff 4, clean channel octane is filled with a channel for yut of the evacuated medium in the form of a bundle of capillaries 5 and the cavity of the measuring unit 7. Excess octane is discharged through the opening 13 for the flow of the medium in the lower lid 12 of the measuring unit 7 so that the capillaries 5 there were no air bubbles left, and the octane level in the cuff 4 is slightly higher than the perforated plate 14. Then the hole 13 is closed. After that, the sample impregnated with pure octane is introduced into the cuff 4 so that its lower end is on the perforated plate 14. The excess octane extruded from the cuff 4 onto the upper end of the sample is removed by suction with a pipette. Then the nipple 2 of the cover 17 of the housing 1 is inserted into the upper part of the cuff 4 and the thread is wrapped.

In this case, the lower part of the nozzle fits with a minimum gap to the upper end of the sample.

In this position, the measuring unit is adjusted and the zero of the optical path is set: illuminator 8 - photocell 9. Having connected to the nozzle 18 a high pressure source, they install pressure conditions and, if necessary, temperature settings in the inner part of the housing 1.

High pressure oil in the space between body 1 and cuff 4

tightly presses it to the nozzle 2, isolating the sample from the space between the housing 1 and the chamber 3.

For measurements, the octane dyed by Sudan III in concentration is introduced into the channel for supplying the displaced medium, made in the form of pipe 2, wrap the thread of the cover 15 of pipe 2 and connecting the fitting with valve 16 to the source of overpressure, open the valve and begin to push-paint octane through the sample. As the colored octane is pressed through the sample, the mixture of colored and pure octane begins to exit the bottom end of the sample. The displaced medium moves along all capillaries at the same speed while maintaining a flat interface, entering measurement unit 7 in the same ratio as at the exit from the end of the sample under study (with some constant time delay).

@ A constant time delay is determined when installing a beam of capillaries 5, caliber them in the absence of the test sample, replacing it with a hollow tube. The delay is taken into account in the calculations. The device provides an increase in the accuracy of measuring the optical density of the medium, according to which the structure of the material under study is judged.

Claims (2)

1.Marmorshteyn L. M, Collection and shielding properties of sedimentary rocks under different thermodynamic conditions, L., Nedra, 1975, p. 63. 2. Marmorshtein LM. The collection and shielding properties of sedimentary rocks under different thermodynamic conditions. L., “Nedra, 1975, p. 86 (prototype). IB