SU1645030A1 - Device for separating grain mixtures - Google Patents

Description

(51) 4600098/03

X22) 09/07/88

(46) 04.30.91. Bul sixteen

(71) Chelba Institute of Agricultural Electrification Mechanization

(72) V.P.Nilov, N.I. Kosilov, N.V. Kovalenko, V.V.Zykov,

V.V. Liven and V.V. Korovin

(53) 621.928 (088.8)

(56) USSR author's certificate

No. 965532, cl. B 07 B 1/12, 1980.

Pavlovsky G.T. and others. Cleaning, drying and active ventilation of grain. M .: Higher School, 1972, pp.91,69, 31, 24.

(54) DEVICE FOR SEPARATION OF GRAIN MIXTURES

(57) The invention relates to agricultural machinery and is intended for the separation of grain mixtures. The goal is to increase the separation efficiency. Each other and parallel to each other are inclined sieves (p). The upper P 4 is made from the boot side with a solid section 8 located under the feeder 2. The diameter of the holes of the upper P 4 is larger than the diameter of the holes of the lower P 6. Middle P 5 is made with elongated holes wider than the diameter of the holes of P 6. Between

18

P 6 and 5 are transversely last, at one distance, from each other, guides (N) 11 are placed. H 11 is installed with an inclination in the direction opposite to the inclination of P 4-6, at an angle not less than the inclination angle P 4- 6, and with a gap relative to P 6. The number of guides is n L / (ht ctg6 & where L is the length of P 6, h is the distance between P 5 and 6, the angle between H 11 and lower P 6. Sections 12 under the lower edge each H 11 is made solid. The gap between the lower edge of each H 11 and section 12 is not less than

The invention relates to agricultural machinery, in particular, post-harvest grain processing machines, and can also be used in other engineering fields, in particular mining and others.

The aim of the invention is to increase the separation efficiency.

Figure 1 shows a diagram of a device for separating grain mixtures with a longitudinal section; Figure 2 shows the distribution pattern of the grain mixture.

The separating device contains a hopper 1, a feeder 2, a sieve mill 3, which consists of inclined sieves arranged one above the other parallel to each other, an upper sieve 4 with round holes s of an average 5 with oblong holes, a lower sieve 6 with round holes and pitched boards

7

The sieve 4 is made of a continuous section 8 on the loading side, located under the feeder 2, and a continuous section 9 on the discharge side as an extension of the sieve, which is installed offset from the lower sieves towards the loading side, the chute board 10 connects the beginning of the sieves 4 and 5 Between the middle sieve 5 and the bottom 6, guides 11 of the grain mixture are placed transversely to the sieves at the same distance from each other with the inclination in the direction opposite to the inclination of the sieves at an angle not less than the inclination angle of the sieves with a gap (i.e., not less than the angle of the tracks) with respect to the lower, minimum holes of P 4-5. The upper P 4 is shifted relative to P 5 and 6 towards the boot end and is made with a continuous section 9 on the discharge side. Perpendicular to the lattice 3 at the center of gravity point P 4-6, a vibrator 19 is installed, which vibrates P 4 and 6 perpendicular to its plane. On P 4, the grain is divided in length, on P 5 - in width, and on P 6 - the fraction going through the passage from P 5 is oriented -H 11 in sections 12 P 6 separating the mixture along the length of the major axis parallel to P 6. 2 silt

it is sieve 6, the number of guides is equal to

-L

Q - ".... j

h-ctgo6

where n is the number of guides; L is the length of the second sieve, which divides the grain mixture along the length of the grains; (B) the distance between the middle sieve and the second sieve, dividing the grain mixture along the length of the grains; fld is the angle between the guides and the second sieve dividing the grain mixture along the length of the grains.

All block repeats are made with the possibility of making oscillations perpendicular to the surface of sieves.

The bottom sieve 6 is made with solid sections 12 under the bottom edge of each guide 11, and the gap between the bottom edge is the direction south-. soup 11 and. the continuous section 12 of the sieve is made not less than the minimum size of the openings of the sieves to ensure the passage of the mixture layer with a thickness of one grain.

The diameter of the holes of the lower sieve b is made smaller than the diameter of the hole of the upper sieve 4, the width of the hole of the average sieve 5 is less than the diameter of the hole of the lower sieve 6.

The sieves 4 - 6 and skatna-board 7 are provided with trays, respectively 13 - 16. The sieve mill 3 is mounted on springs 17, which are fixed to the frame 18. The vibrator 19 is installed perpendicular to the sieve mill at the center point of the sieves body, which are oscillated perpendicular rno its plane. In the example

516

For a particular design, the slope of the sieves to the horizon is suggested in the range of 15. The diameter of the sieve holes 4. and 6 is 4.5 mm and 3.2 mm, respectively, and the size of the rectangular sieve holes is 5-2.2 mm. The oscillation frequency is suggested to be at least 50 Hz.

The device works as follows.

The vibrator 19 communicates a high-frequency, low-amplitude oscillation to the lattice mill. The high frequency of oscillations contributes to the redistribution of the mixture on the separated surfaces on the basis of the specific weight of the grains, and also contributes to the good passage of the short fraction of the mixture and the self-cleaning of the sieves. The small oscillation amplitude does not give the mixture grain a vertical position for a certain moment, which prevents long impurities from passing into the sieve holes and also ensures the grain mixture moves down the sieves. Oscillations directed perpendicular to the surface of the sieves provide the same vibration amplitude at any point of the sieves, which is a prerequisite for good separation of the mixture.

A grain mixture consisting, for example, of wheat and oat grain, from the hopper 1 is fed by feeder 2 to section 8 of sieve 4, where the grain of the mixture is oriented parallel to the sieve with its larger axis. In the upper sieve, the grain is divided in length, the long oat is overhanged, and the short oat is the main crop by passage, on sieve 5 the grain is separated in thickness. From the sieve 5, wheat of the first grade goes, and a short oats and wheat of the second grade go through. The fraction t going through the passage from the sieve 5 is guided by the guides 11 in sections 12 of the solution 6, which separates the mixture along the length of the major axis parallel to the sieve, with a descent going short, and the second grade wheat.

Selection of sieves is carried out taking into account the largest size

This fraction of impurity and the largest grain size of the second grade of the main crop.

Claims (1)

Invention Formula A device for separating grain mixtures, including a feeder, inclined sieves arranged one below the other parallel to each other, the upper one of which is made on the loading side with a continuous section located under the feeder and with a hole diameter greater than the diameter of the lower sieve holes, and the middle one made with oblong openings with a width less than the diameter of the openings of the lower sieve; a sieve oscillating drive, characterized in that, in order to increase the efficiency of grain separation, the sieve mill has guides located between the lower and middle sieves transversely to the latter at the same distance from each other, with a slope in the direction opposite to the slope of the sieves at an angle not less than the angle of the sieve, with a gap relative to the lower sieve, with the number of guides equal L h-ctg 06 n j 0 5 0 c where L is the length of the bottom sieve; h is the distance between the average and bottom sieves; 66 — angle between guides and lower sieve moreover, the lower sieve sections under the lower edge of each guideway are solid, and the gap between the lower edge of each guideline and the solid section is smaller than the minimum size of the sieve holes, while the upper sieve is offset from the bottom towards the loading end and is made with a solid section on the discharge side, and the sieves are installed with the possibility of oscillations. perpendicular to their plane. Landmark ff "a impurity Original arrogance Sieve b F  f Sieve g -z is & I Esvrt Sieve B D / ffffffftf / e bring 1s & rt is Bring FIG. 2