RU81910U1 - SITO FADEEVA - Google Patents

Abstract

A sieve containing hexagonal calibrating holes, characterized in that it contains a perforated plate with hexagonal holes, in which the centers of three adjacent hexagonal holes are located at the vertices of an equilateral triangle.

Description

The device relates to the field of devices for sifting, calibration, dividing into fractions of seeds of plants, grain. It can be used in agriculture or farming, seed production, oil and fat, confectionery, grain processing industry.

Known sieve (see descriptions of the invention to patents No. 2000853 or No. 2236310 of the Russian Federation) containing hexagonal holes.

Known sieve consists of an elastic mesh with hexagonal cells of a slit-like shape.

A disadvantage of the known sieve is the complexity of manufacturing the sieve, the instability of the transverse size of the holes (cells) during sieve operation, which leads to a decrease in calibration accuracy, low reliability of the sieve due to the large value of its pre-tension.

The purpose of the improvement is to simplify the design, increase the accuracy of seed calibration, increase the reliability of the sieve.

This goal is achieved in that a sieve containing hexagonal gage holes, according to an improvement, characterized in that it contains a perforated plate with hexagonal holes, in which the centers of three adjacent hexagonal holes are located at the vertices of an equilateral triangle.

The perimeter of a hexagon is always greater than the length of the circle inscribed in it. In addition, in a sieve with hexagonal holes, jumpers with parallel sides, which improves the permeability and compactness of the sieve, since the width of the jumpers can be brought to 1 - 1.5 thickness of the plate sheet. When sifting grain seeds through hexagonal holes, the seeds touch its sides at a maximum of six points, or even less. That is, the grain is less prone to jamming in the sieve

when it vibrates, it passes through hexagonal holes more easily than through round ones.

Hexagonal holes of the correct form. A sieve with identical jumpers between hexagonal holes. Hexagonal holes are made in the form of perforations in the plate. The location of the centers of three adjacent hexagonal holes along the vertices of an equilateral triangle allows us to obtain a simple and reliable system of rigid identical jumpers between the holes, able to reliably hold a given caliber of a sieve hole obtained during its manufacture by stamping from a metal or plastic sheet.

Effect: simplified design, improved accuracy and reliability of calibration.

Figure 1. Sieve. Fragment. View from above.

Figure 2. Sieve. Fragment. Side view.

The list of symbols in the drawings

a - the width of the hexagonal hole or the diameter of the inscribed circle in the hexagon;

t is the width of the bridge between adjacent sides of the hexagons of the holes;

b is the thickness of the plate sheet.

The sieve contains a perforated plate with hexagonal holes, the centers of which are located at the vertices of the hexagon, or whose centers of three adjacent holes are located at the vertices of an equilateral triangle.

The width "t" of the jumper between the holes is from 1 to 1.5 times the thickness "b" of the plate sheet.

The perforated sieve plate is made of a metal (steel or non-ferrous metal) sheet or a plastic sheet of constant thickness.

The thickness "b" of the plate sheet is from 0.6 mm to 1.5 mm.

The width "a" of the holes is from 0.5 mm to 15 mm.

For hexagonal holes with a width of "a" from 0.5 mm to 3 mm, the thickness "b" of the plate is 0.6 mm, the permeability of the sieve increases from 97% to 144% relative to the sieve with round holes.

For hexagonal holes with a width of "a" from 3 mm to 6 mm, the thickness "b" of the plate is 1 mm, the permeability of the sieve increases from 60% to 113% relative to the sieve with round holes.

For hexagonal holes with a width of "a" from 6 mm to 15 mm, the thickness "b" of the plate is 1.5 mm, the permeability of the sieve increases from 53% to 92% relative to the sieve with round holes.

The smallest size of the width of the jumper between the holes is equal to the thickness of the plate sheet. The width of the rectangular sweep of the sheet of the perforated plate is 790 mm The length of the rectangular sweep of the sheet of the perforated plate is 990 mm.

The device operates as follows.

When sifted through a sieve of poppy seeds, the width "a" of the hexagonal holes can be 0.5 mm, and for corn seeds the width "a" of the hexagonal holes can be 15 mm.

The perimeter of a hexagon is always greater than the length of the circle inscribed in it. In addition, in a sieve with hexagonal holes, jumpers with parallel sides, which improves the permeability and compactness of the sieve, since the width of the jumpers can be brought up to 1-1.5 the thickness of the plate sheet. When sifting grain seeds through hexagonal holes, the seeds touch its sides at a maximum of six points, or even less. That is, the grain is less prone to jamming in the sieve when it vibrates.

Hexagonal holes are made in the form of perforations in the plate. The location of the centers of three adjacent hexagonal holes along the vertices of an equilateral triangle allows us to obtain a simple

and a reliable system of rigid identical jumpers between the holes, capable of reliably holding a given gauge of a sieve hole obtained during its manufacture by stamping from a metal or plastic sheet.

Claims (1)

A sieve containing hexagonal calibrating holes, characterized in that it contains a perforated plate with hexagonal holes, in which the centers of three adjacent hexagonal holes are located at the vertices of an equilateral triangle.