Bench to test cellular surfaces

FIELD: process engineering.

SUBSTANCE: invention relates to test equipment, particularly, to devices for testing cellular surfaces for quality of grain mix separation. Proposed test bench comprises drive, frame, cellular surface, discharge bin, feed bin with flap and outlet. Test bench is equipped with belt conveyor and hollow box divided into equal parts by baffles with walls converging to the bottom to feed admixtures into outlet filler.

EFFECT: higher accuracy of measurement.

4 dwg

 

The invention relates to test equipment, namely, devices for testing cellular surfaces on the quality of the separation of grain mixtures.

A device (laboratory Trier), including the frame, the actuator, the hopper, the outlet, the cellular surface, Hatcher tray (A.S. USSR №566636, WV 13/02, 23.03.1976 year).

The proposed device does not provide a constant ratio of the shared components of the mixture due to its separation in the loading hopper as the expiration of him. It is not possible to preserve the conditions of the experiments in time and to obtain reliable measurements of the quality of separation of the mixture.

A device (indent complex) for testing cellular surfaces when creating a new indent machines, including the drive, feed hopper with valve, exhaust, mesh surface, bringing augers, brush, receivers fractions (RF patent No. 2275242 WV 1/02, 12.07.2004 g) is selected as a prototype.

The proposed device does not provide an accurate measure of the allocation of particles in conjunction with the initial infestation of the grain mixture, as the grain mixture at the end of the feed hopper stratified (light particles "float" up), and its composition on the mass ratio between the main crop and impurities varies with time. In the test conditions become change is passed, they differ significantly from the actual operating conditions are machines in continuous process lines. Therefore, the test results obtained using the proposed indent complex, cannot serve as an objective basis for the creation of new indent machines.

The purpose of the invention is the improved accuracy of the measurements.

This objective is achieved in that the stand for testing porous surfaces, including the drive, frame, wire mesh surface that outputs the screw feeding hopper with valve, drain, according to the invention, the stand is equipped with a conveyor and a hollow box, divided into equal parts by walls converging toward the bottom wall.

Device for testing cellular surfaces is illustrated by drawings, where figure 1 shows a General view (original position after the previous experience), figure 2 - cross section A-a in figure 1 (on), figure 3 - a view B in figure 1, figure 4 - cross section b-b In figure 3.

Test stand for porous surfaces contains a supply hopper 1 with the flap 2, the outlet 3 with the receiving orifice 4, the cellular surface 5, the drive and. support rollers 6, 7, output screw 8, the conveyor belt 9, the hollow box 10, the partition 11 with descending walls 12, the tray 13, a frame 14, prefabricated tanks 15 and 16.

Test stand for porous surfaces works as education is. In the supply hopper 1 with the flap 2 load the grain of the main culture, and in the hollow frame 10 placed on the conveyor belt 9, evenly along the height of the load impurities. Then the hollow box 10 raise with belt conveyor 9, open the valve 2 inlet hopper 1 to a predetermined (by the results of the calibration of the intensity of the expiration of the grain of the basic culture of the feed hopper 1) the amount and at the same time turn to the work of the belt conveyor 9. After that, the grain is the main crop in a given mass ratio with impurities poured into the receiving orifice 4 and the free stream at the outlet 3 into the internal cavity of the rotating mesh surface 5 based on drive 6 and the support 7 videos. Particles share of the grain mixture are captured in the mesh surface 5 and a rise in the tray 13, which displays the screw 8 is moved in a team capacity 16. The remainder of the grain mixture by gathering comes from the internal cavity of the porous surface 5 team in the capacity of 15.

The speed of the belt conveyor (Vl) is determined by the formula:

Vl=Lto/top,

where Lto- the length of the duct, m;

top- time experience;

The value of the mass of the impurity (mp), which is placed in the hollow box 10, calculated by the formula:

mp=QoLto/[(1-C)Vl],

where C is the set in which the conditions of the experiments infestation of grain, in fraction;

Qo- consumption of the main culture of the feed hopper 1 kg/S.

The presence of the second feed channel component of the grain mixture (impurities) using a belt conveyor 9 allows you to save time and mass ratio of the partial components. Save time test conditions ensures the objectivity of measuring effective performance. The separation of the trunking 10 partitions 11 allows you to Orient the location of the long impurities across the belt conveyor 9, which reduces the coherence of the particles of impurities and the probability of their random (irregular) descent into the receiving orifice 4. Converging towards the bottom wall 12 of the partitions 11 reduce the likelihood of freezing between particles of impurities when lifting boxes 10 before the beginning of the experience that promotes uniform distribution of impurities on the conveyor belt. The dimensions of the feed hopper 1 is selected to be sufficient for the flow rate (Qomain culture during the experiment (top) did not change significantly. After each experience in the supply hopper 1 add corn main crop in the number of Qotop.

Thus, the distribution of the particles of impurities on the ribbon with the help of hollow boxes divided into equal parts by partitions and feed their belt conveyor provide improved accuracy measured the th.

Test stand for porous surfaces, including the drive, frame, wire mesh surface that outputs the screw feeding hopper with valve outlet, wherein the stand is provided with a conveyor and a hollow box, divided into equal parts by walls converging toward the bottom wall.



 

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