SU527630A1 - Instrument for measuring the mechanical properties of bulk materials, such as tobacco - Google Patents

Description

one

The invention relates to testing equipment, in particular to installations for testing materials in compression.

A known device for testing materials in compression, comprising a table for placing a sample, a device for loading by compressive load and measuring axial deformation l.

A disadvantage of the known instrument is that it does not allow measuring the lateral deformation of the sample, because it does not have the means to limit the scattering of the friable mass.

A device for measuring the mechanical properties (creep) of materials is known, comprising a housing and a cylindrical chamber made up of several longitudinal sections, designed to fill the tobacco mass with a breakdown, pressing mechanisms, the number of which is equal to the number of sections and each of which is connected to one of the sections devices for loading an axial compressive load and for measuring the axial deformation of a tobacco mass sample 2.

2

A disadvantage of the known device is the low accuracy of the test, because in the process of deforming the test sample there is a displacement of the sample material relative to the sections and consequently the appearance of friction forces, which adversely affect the accuracy of the load.

The purpose of the invention is to increase the accuracy of the tests.

To do this, in the proposed instrument, each clamping mechanism is made in the form of a parallelogram located in a plane parallel to the radial plane passing through the middle of the section, one base of which is fixed to the body, and the opposite is associated with the section.

The drawing schematically shows the proposed device.

The housing of the device consists of the upper 1 and lower 2 tiles fixed on the uprights 3. On the bottom plate 2 there is a movable bottom 4 with a joint 5, on which a cylindrical chamber composed of several longitudinal sections 6 is installed;

i; o | S mass (not shown). Each A-section; the supply section is a clamping mechanism, made in the form of a hinged parallelogram, one base 7 of which is fixed on the top plate 1, and the opposite fi is connected to section 6 on the other side, the block 9 is fixed on the other. a thread with a thread fixed on it (not shown in the drawing), the end of which is fixed on the case, and the load is attached to another yen (not shown). On one of the sides 10 of the parallelogram is installed a counterweight 11.

The loading device is made in

the type of load 12, connected by a drive with an electric motor 1gatel (not shown). The device for measuring the axial deformation - Ш1И consists of a disk 13 connected by a flexible stretch thread 14, thrown through blocks 15 with a counterweight 16, an arrow 17 is attached to the thread 14, moving along the scale J. 8.

The device works as follows

The cylinder formed by sections 6j is loaded with a breakdown of tobacco tobacco, on top of which a disk 13 is mounted, then with the help of a drive a weight 12 is lowered onto a disk 13,

In the process of loading, the length of the sample decreases and its diameter increases, and the cylinder section 6 moves both in the radial direction and axially in the direction of the compressive load. The size of the clamping of the sections to the sample is regulated by the counterweight 11. The lateral deformation is determined with

using flexibly; HSITT: spanning the blocks 9. CteBaH of the deformation is measured using a flexible thread 14 with an arrow 17 attached to it along the tongue 18. After completing the test, the load 12 rises, and the bottom 4 turns around the hinge 5, and the tested sample is removed.

Fore

the invention

mule

A device for measuring the mechanical properties of bulk materials, for example, tobacco mass, comprising a housing and a cylindrical chamber made up of several longitudinal sections, designed to fill the sample of tobacco weight, pressing mechanisms, the number of which is equal to the number of sections and each of which is connected to one of the sections , devices for loading an axial compressive load and for measuring the axial deformation of a tobacco mass sample, characterized in that, in order to increase the test accuracy, each fur The anism of the clamp is made in the form of a parallelogram located in a plane parallel to the radial plane passing through the middle of the section, one base of which is fixed to the body and the opposite side is connected to the section.

Sources of information taken into account in the examination:

1. The copyright certificate number 145386, class, G 01 N 3/08, 20.03.61,

2, Copyright certificate № 281889, Ш1. G 01 N 3/02, 08/17/68.