SU409255A1 - - Google Patents

Description

I

The invention relates to devices for the mechanical selection of seeds of agricultural crops during sampling for analysis or other work related to the reading of a given number of seeds of predominantly spherical and ellipsoidal shape.

Seed collection devices are known that are hollow in the form of a cassette with a cut and cells with cylindrical and tapered portions.

However, in these devices, two or three seeds that are removed manually are not sucked to the individual holes. This reduces accuracy and performance when counting seeds.

In addition, the pneumatic counters suck to the holes, first of all, seeds with a large mid-section section, the wire thus partly separating them along this priziak. Such an account does not allow us to give an objective characteristic of the studied aggregate of seeds.

The proposed device is characterized in that, in order to increase the accuracy of counting, the diameters of the cylindrical and tapered portions of the cells are referred to as 1.6: 1.9, and the diameter of the cylindrical portion of the cell to its height is 0.9: 1.2.

The drawing shows a view of the middle of the proposed device with a longitudinal section at the location of the cells, its top view and a section of the cell along AA.

The device contains a rectangular tapered front cassette /, the continuation of which is the handle 2. On the surface of the cassette are located the single-grain filling cells 3 for collecting seeds from a grain mass, the number of which is a multiple of the specified counting level.

Each of the cells is a through hole, where the top (inlet) part is cylindrical, and the bottom is made in the form of a reverse truncated cone. The presence of single-grain filling cells ensures that only one seed is consolidated in each of them, as well as a free exit of seeds when the blade is unloaded.

The height of the cell is 2/3 of the average length ce. n The diameter of the cylindrical part of the cells is greater than the mean seed pyrin by four standard deviations of this sign and refers to the diameter of the conical part of the cell as 1.6: 1.9. The distance between their centers is equal to the diameter indicated above plus 2 mm. The slope of the generatrix of the lower cone part of the cell is greater than the friction angle of the seed of the blade material, and the diameter of the outlet orifice is less than the average seed thickness by four standard deviations of this thickness.

For the purpose of quick visual control over the accuracy of filling the cells, the paddle is made of transparent organic glass.

For selection, the spatula for filling the cells is immersed in seeds. Then it is taken out of the seeds, a quick visual check is made of the accuracy of the filling of the cells and, with gentle shaking, the locks are removed with the excess seeds that have sunk between the filled cells. After that, by rotating the blade by 180 °, the crumbled group of seeds is poured into the tray for further analysis. The number of samples depends on the set level

accounts. For sampling of seeds for analysis, blades per 100 cells are usually used, and for determination of the absolute weight - at 125.

The subject matter of the invention is a device for sampling, containing cassettes with a cut and cells with cylindrical and tapered portions, characterized in that, in order to improve the selection accuracy, the diameters of the cylindrical and tapered portions of the cells are 1.6: 1.9, and the diameter of the cylindrical part of the cell to its height is 0.9: 1.2.