SU1704853A1 - Device for separation of grain mixtures - Google Patents

Abstract

The invention relates to the separation of grain mixtures on the basis of length and can be used in agriculture and the milling industry. The purpose of the invention is to improve the quality of separation of grain mixtures. The device comprises a vertical sieve drum, provided with corrugations, on the protrusions of which there are holes, and an internal device for distributing the grain mixture. The latter has feed channels mounted on a common base, on the back (along the sieve) walls of which the segments with elastic plates are mounted. Making the sieve drum corrugated makes it possible to significantly improve the orientation of the particles of the mixture during separation and to increase the rigidity of the sieve drum, which helps to improve the stability of the working gap. 3 silt

Description

The invention relates to mechanical engineering, in particular, to devices for separating grain mixtures according to the length attribute, and can be used in agriculture, the milling industry and other sectors of national economy.

A known machine for separating grain mixtures by length, containing a rotating cylindrical sieve, inside of which a drum rotating at a different speed from a sieve is located coaxially, an annular brush, as well as a feeding and collecting-outputting device, at the same time to the sieve surface ;; There is a rigid spiral screw attached to it, the height of which does not exceed the thickness of one elementary layer of grain.

The disadvantage of this machine is the low completeness of the selection of the long component of the mixture due to the disorienting effect of the ring brush.

The closest to the proposed invention in technical essence and the achieved effect is a device for separating grain mixtures, which contains a screening surface in the form of a vertically mounted cylindrical sieve and an internal device for distributing grain mixture consisting of segments with elastic plates and vertical feed channels.

The disadvantage of this device is that some particles of the short fraction, the large axis of which is oriented across the direction of movement of the sieve holes, are captured last and, unable to slip relative to the sieve holes,

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extirpated out of the segment, mixing with the particles of the long fraction. There is no difference between the thickness and width of the grains and the elasticity of the sep plates. they are rolling. A part of the mixture passes under the sieve lintels and falls into an escapade;: .- 1 /:. In addition, the cylindrical sieve has a low rigidity, which negatively affects the stability of the working gap between the nimgos :: segment. And also reduces the quality of the sglsn.nn.

The purpose of the invention is to improve the quality of separation of grain mixtures.

According to the proposed device, for the hp decking zerko zys mixtures, including a lattice leopard 5 with a vertical axis of rotation, inside which is placed the device for distributing the grain smelter in the form of segments with elastic plates and located between the vertical feed channels, the grate drum is corrugated and has holes located on the ledges of the corrugations.

In Fig.1 schematically shows the proposed device, top view; figure 2 - section aa in figure 1; FIG. 3 is a flow chart of the separation process.

The device comprises a corrugated sieve drum 1 with a vertical axis of rotation mounted on a cut-out disk 2 rotated by a hollow shaft 3, an internal fixture for the distribution of the grain mixture, including segments 4 with elastic lining 5 fixed on the rear (along the sieve) vertical walls feed channels 6. having a common base 7. mounted on an axis 8, a casing 9 and a collecting device 10 for the separated components of the mixture.

The device works as follows.

The grain mixture enters from the hopper (not shown) into the feed channels 6 and its particles are pre-oriented, in contact with the rotating sieve JBHOM 1. equipped with corrugations on the working surface (zone A). Eligible for

the expense of friction forces between the sieve drum 1 and the elastic lining 5 segment a 4, the particles of the mixture settle into the grooves formed by the corrugations and orient the RDOL of the rows of holes located behind them (zone B).

Due to the braking effect of the elastic pads 5, the particles are slipping relative to the openings of the sieve drum 1. In this case, short

the particles rotate relative to the edge of the hole and pass about it. Reflected from the casing 9, they fall into the outer funnel of the collecting-output device 10. Long particles without

the ability to turn an angle sufficient to pass into the sieve 5 orifice 5: work 1. go off, outside the segment 4 fall down (zone C) and, the passage through the apertures of the cut-out disk 2. get into the internal funnel of the collecting and removing device 10.

The geometrical black dimensions of the corrugations and the gap between the sieve drum 1 and the elastic lining 5 of the segment A depend on

the particle size of the mixture and the elasticity of the linings are chosen as follows. to provide a single layer distribution of the particles of the mixture in the separation zone.

Claims (1)

Invention Formula A device for separating grain mixtures, including a sieve drum with a vertical splicing axis and a fixed device located therein for distributing the grain mixture to the form of segments with elastic overlays and vertical feed channels located between them, which is different with. topics that, in order to improve the quality of separation of grain mixtures, the sieve drum is made corrugated, and the holes are made on the ridges of the corrugations. / Phi2.1 2 r4 .// five 9 ///BUT eight 6d -Yu FIG. 2 3 : fl V4feiV to “i z &