SU1298614A1 - Device for determining accessible porosity volume of solids - Google Patents

Abstract

The invention relates to the field of mining and improves the accuracy of measurements and reduces their labor intensity. For this, sample 3 is placed in a measuring vessel. 1 with the immersion liquid 2. With the vessel 1, through the taps 13, 16 and 17, an additional vessel 12 for the working fluid, the pressure unit 15 and the vacuum pump 18 are connected by pipes. Through the valve 14 of FIG. one

Description

the court 12 is connected to the nodes 15. On the vessel 1 with the possibility of moving along it is installed the electromagnet 9 of the liquid volume control unit. The block also includes flat pollakov 8 of magnetic material with specular planes 9. Symmetrically with respect to the float, there are two pairs of illuminators 10 and photodetectors 11, included in the adjacent shoulders of the pavement recording circuit. A pressure gauge is connected to line 5 of vessel 1

one

The invention relates to mining, namely, devices for determining the amount of available porosity of rock samples, shaped granular materials and powders.

The purpose of the invention is to improve the accuracy and reduce the complexity of measurements.

FIG. 1 shows a diagram of an apparatus for determining the amount of available porosity; in fig. 2 - diagram of the course of light rays when moving the float with the level of the measuring fluid.

A device for determining the volume of available porosity contains a measuring vessel 1 with immersion sheath, with a volume of 2 dp of sample placement 3. The measuring vessel 1 is blocked by a vacuum seal

4 through which the highway is suitable

5. The device also contains a U-shaped manometer 6 with a block 7 controlling the level differences on this U-shaped manometer and a block controlling the volume of a liquid containing a flat float 8 of magnetic material with specular planes 9, designed to be placed on the immersion surface. liquids 2. In the indicated block there are at least two pairs of illuminators 10 and photodetectors 11.

The device has at least one additional pump unit 12 for the working fluid (there may be other vessels for different working bodies) connected by taps 13 and 14, respectively, to the measuring vessel 1 and the pressure unit 15, which can be used as a pressure line from

6, gradually opening the valve 17, all air or other working fluid is pumped out of the pores of sample 3. When the pressure above the liquid 2 is atmospheric, the first reading is removed. The second count is made after the valve 17 is fully opened. From the difference of these readings and taking into account the known diameter of the vessel 1, the density of the liquid 2 and the height of its column, the volume of available porosity is calculated. 2 Il.

a compressor, a pump, a gas cylinder connected through a throttle, or a vertical cylinder with a piston. The pressure node 15 through the valve 16 is connected to 5 line 5, to which is also connected through the valve 17 is connected a vacuum pump 18.

Photodetectors 11 are included in the adjacent shoulders of a bridge circuit, in which O also includes resistors 19 (for; temperature compensation, the same type of darkened photoreceivers can be used as these resistors

5 with the main photodetectors 11). The bridge circuit from photo-detectors: 11 and resistors 19 is powered from source 20, and a scribe 21 is connected to its output. To drain the immersion

0, of a fluid or working fluid, a nozzle 22 is provided with a valve 23, through which the nozzle 22 is connected to a drain vessel (not shown), sealed or pumped out. Input beam 24

 from the illuminator is reflected from the plane 25 in the initial position, hit the point 26 on the photodetector 11, and from the plane 27 after evacuating, for example, air or another working body, hit the point 28, which leads to a change in the signal from the photodetector. On the vessel 1 is placed an electromagnet 29.

A device for determining the volume of available porosity works as follows.

Sample 3 is placed in a dry (without liquid 2) vessel 1, the working fluid is supplied from the pressure unit 15 by opening the valve 16, and then it is opened first. 31298614

Tap 13, and then 14, after which the measuring vessel is filled with immersion liquid 2 or working fluid (in this case, the immersion liquid is in another additional vessel 12). After equalizing the pressures, the taps 13, 14, and 16 shut off, turn on the vacuum pump 18, and turn off the power of the electromagnet 29, which releases the float 8 made of magnetic material to the attracting JQ. The latter pops up on its surface on the immersion liquid. Then, jf valve 17 is gradually started to open, and when the pressure above the liquid reaches atmospheric (to automate the fixing process of THAT moment, a sensor is installed on the pressure gauge 6, for example, an electrocontact - 20 stroke - not shown, - giving a signal to the recorder 21), remove the first countdown on the recorder 21 and continue to open the valve 17 to complete

a vessel and an obrazhchts, only due to opening and closing of the corresponding cranes that is especially essential during the work with low-strength samples. In addition, the proposed level measurement scheme has an advantage over the known optical level gauges, since it implements the differential measurement principle, but with the difference that the lower photo sensor receives a beam focused by the vessel with immersion liquid, which significantly increases the sensitivity and reduces the temperature error measurements (due to small deformations of the lower mirror from heating by the illuminator beam, as it is immersed in the immersion liquid).

Claims (1)

Invention Formula A device for determining the volume of available porosity of solids, containing a measuring vessel with an immersion and opening and evacuating all the air with 25 liquid to place, formed another working medium from the sample pores, after which the second reading was taken, based on the difference of the previous calibration, for example using an inductive or other sensor for small movements and taking into account the known diameter of the measuring vessel 1, the density of the immersion liquid and the height of its column, the required volume of available porosity is calculated. Similarly, the determination is made in the case of using other working fluids. The increase in accuracy and reduction in labor intensity is measured due to the presence in the device of an additional hermetic vessel for the working fluid, which eliminates the possibility of unrecorded air volumes from the atmosphere, and all measurements are carried out at a constant measuring position. vessel and obrazhchtsa, only by opening and closing the corresponding cranes, which is especially important when working with low-strength samples. In addition, the proposed level measurement scheme has an advantage over the known optical level gauges, since it implements the differential measurement principle, but with the difference that the lower photo sensor receives a beam focused by the vessel with immersion liquid, which significantly increases the sensitivity. And reduces the temperature measurement error (due to small deformations of the lower mirror from heating by the illuminator beam, since it is immersed in an immersion liquid). Invention Formula A device for determining the volume of available porosity of solids, containing an immersion measuring vessel, a unit for controlling the volume of a liquid, a pressure gauge and a pressure unit, through valves connected to the measuring vessel, is equipped with an additional a vessel for the working fluid and a vacuum pump connected by highways through taps to the measuring vessel, while the control unit for the volume of liquid is made in the form of a flat float of magnetic material from the mirror by the electric planes of an electromagnet mounted on a measuring vessel with the ability to move along it, two pairs of illuminators and photodetectors placed symmetrically relative to the float, and a pavement recording circuit, with the photodetectors included in the adjacent shoulders of the pavement recording circuit. 2 25 Editor I.Gorn Compiled by S. Potapov Tehred M. Morgental Order 880/44 Circulation 777 Subscription VNIIPI USSR State Committee for Inventions and Discoveries. 113035, Moscow, Zh-35, Raushsk nab., D. S Production and printing company, Uzhgorod, st. Design, And 2 Proofreader M.Semborska