SU1645038A1 - Sieve - Google Patents

Abstract

The invention relates to the separation of seeds of round-seed crops from impurities. The purpose of the invention is to improve the quality of separation of impurities by using their natural orientation on the 1 sieve web. -J / - The screening holes (SW) on lotne 1 are arranged in rows of herringbone and have an oblong shape. Over each software is made U-shaped overlap 3. The upper wall 4 of the overlap 3 is parallel to the canvas of the channels (KK) 5 along the long sides of the software. The side walls 6 of the ceiling 3 are fixed to the short sides of the software. The width of the software is greater than the height of QC 5 and should ensure the free passage of the selected impurities. When meeting with KK 5, broken grain and impurities are separated. When meeting with the longitudinal edge of the overlap, the seeds 3 move along it and, due to its location at an angle to the direction of flow, the seeds do not fall into CC 5, but are extracted into the tailing fraction. 7 il.

Description

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BUT

The invention relates to agricultural machinery, in particular, to devices for separating round seed seeds from impurities.

The chain of the invention is to improve the quality of separation of impurities from seeds of round-seed crops by using their natural orientation on the screen of the sieve.

Figure 1 shows a sieve, side view; figure 2 is the same, top view; figure 3 - section aa in figure 1; 4–7 are variants of separation of impurities.

The sieve consists of a blade 1 with elongated sifting holes 2 arranged in rows of a herringbone at an angle to the direction of movement of the grain flow. A U-shaped overlap 3 is made above each hole, the upper wall 4 of which is arranged to form vertical calibration gauges with the plane of the grain. The catches 5 are located along the long sides of the openings 2 in a plane perpendicular to the plane of the web 1, and the side walls of which are attached to the short sides of the sieving bore s, while the width more than the height of the calibration channel, and the width of the U-shaped overlap 3 can be made less than the width of the apertures 2, and the distance between the longitudinal edge of the U-shaped overlap 3 and the longitudinal edge of the aperture 2 is less than the thickness of the seed; passage of isolated impurities.

The sieve works as follows.

The mixture (the material to be separated) enters the beginning of the working surface of the web 1, forming a layer one particle thick on its surface. Moving relative to the web 1, the impurity (broken grain) under the force of gravity obtains a natural orientation (FIG. 6-7), in which the smallest size of the broken grain is, like calibration channel 5, in a vertical plane, so when meeting with the calibration the broken grain is separated by a channel, fine, frost is also separated. live grains and other impurities that are + + smaller than the height of the calibration channel 5. Seeds, when they encounter a longitudinal edge of the U-shaped overlap, 3 move along it, as it is angled to the direction of movement of the seed flow and prevents seed from entering n in the calibration channel. Thus, the impurities are separated through the calibration channels 5 and the openings 2 in the web 1 and enter the passage fraction, and the seeds, moving along the edges of the U-shaped overlaps 3, move along the web and fall into the gather fraction.

The use of a sieve is possible in a separator with tilting sieve mills for cleaning soy from impurities. In a separator, the separation can be carried out in several stages on smooth gratings with triangular and oblong holes. In this case, the sieve serves to extract the seeds into the tailing fraction.

During operation, the initial mixture enters a sieve with round holes, where the heap of soy is distributed into two streams. The mixture is then fed to the sieves with vertical calibration channels, where impurities (broken, frost grain) are separated, the grain mixture, consisting of broken and fine grains, is cleared of small impurities, and the seeds are sorted.

Claims (1)

Invention Formula A sieve that includes a web with rows of sifter holes of oblong shape, arranged in a herringbone, characterized in that, in order to improve the quality of separation of impurities from seeds of round-seed crops by using their natural orientation on the sieve cloth, a U-shaped the overlap, the upper wall of which is parallel to the screen of the sieve with the formation of vertical calibration channels with the working surface of the web along the long sides of the screening hole, the side walls of which They are attached to the short sides of the screening hole, and the width of the screening hole is larger than the height of the calibration channel. Fy J vf At //// L FIG. I Fig.Z / 7 / U /. YY V // SA FIG. 5 7 - ъ / л.