SU1659127A1 - Apparatus for screening loose materials - Google Patents

Abstract

The invention relates to the cleaning and sorting of seeds of various agricultural crops. The purpose of the invention is to increase the efficiency of screening and the productivity of the device. Parallel to each other, flat sieves (P) 1 and 2 are installed one after the other with the possibility of reciprocating movement. The lower one is connected to the upper P 1 by means of vertical elastic plates 10 and is installed with the possibility of adjusting the amplitude of its oscillations relative to P 1. transverse partitions (П) 3, perpendicular to the longitudinal axis P 2. Under the acute angle to П 3 on the lower Р 2 fixed longitudinal П, forming П 3 cells. In the cells are located cleaning balls 5, made with an offset center of gravity. The transverse side of the cell is made longer than its longitudinal side, which increases the reflectivity of P. The upper P 1 is brought into reciprocating motion from the vibrating actuator 13. From P 1, P 2 is transmitted through the plates 10, the impact on P 1 is transmitted, balls 5 clear it from grains stuck in it throughout the entire area of P1. 1 z.p. f-ly, 5 ill. m yo

Description

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The invention relates to agricultural machinery, in particular to grain cleaning machines for cleaning and sorting seeds of various agricultural crops.

The purpose of the invention is to increase the efficiency of screening and the performance of the device.

FIG. 1 shows a device, a longitudinal section; FIG. 2 is a top view of the upper sieve removed; FIG. 3 is a view A of FIG. 1; FIG. 4 is a schematic representation of the position of the cell formed by partitions, the time of oscillation of the lower lattice; FIG. 5 shows the node I in FIG. four.

The device contains two flat parallel sieves 1 (screening, main) and 2 (supporting cleaning balls), located one below the other with the possibility of reciprocating movement. On the lower sieve 2, transverse 3, perpendicular to the longitudinal axis of the sieve, and 4 longitudinal partitions are fixed. The transverse 3 and longitudinal 4 partitions form between themselves the cells in which the cleaning balls are placed. The longitudinal partitions 4 with transverse partitions 3 form an acute angle "(Fig. 4), which is determined by the formula

and arctg (2A / d),

where a is the angle between the longitudinal and transverse partitions;

A is the amplitude of oscillations of the lower sieve;

d is the diameter of the cleaning ball.

Transverse 3 and longitudinal 4 partitions are installed as follows. that the frames formed by them in the cells have a greater length of the transverse side (Fig. 4) than the length of its longitudinal side. This makes it possible to increase the reflectivity of the installed partitions with an optimal area of the framework.

The cleaning balls 5 are made with an offset center of gravity, which leads to more efficient cleaning of the sieve 1 due to the additional sliding of the balls 5 at the moment of their impact on the sieve 1. On the sieve 2 transverse plates 6 are installed, which increase the activity of the cleaning balls 5. Lower sieve 2 by means of two rigid plates 7, in which elongated cuts are made (Fig. 3), fastened through bolted joints 8 and washers 9 to

vertical elastic plates 10, in which elongated notches are also made (FIG. 3), and thus secured to the upper sieve 1 by means of plates 10.

The implementation of rigid plates 7 and elastic plates with elongated notches and their connection by means of washers 9 makes it possible to regulate the amplitude of oscillations of the lower sieve 2 relative to the upper one by

moving the height of the bolted joint 8. The elastic plates 10 are connected by means of the bolted joint 11 with the sides 12 of the sieve 1. The sieve 1 and 2 with the cleaning balls 5 are brought into reciprocating motion from the vibrodrive 13.

A device for screening bulk material works as follows.

The initial grain mixture enters the sieve 1, where a part of the grain mixture is sifted through the sieve 1, and the remaining part goes off. The sieve 1 is driven back and forth from the vibrodrive 13. From the sieve 1 through the elastic plates 10, oscillations are transmitted to the sieve.

2. A blow to the upper sieve 1, cleansing balls 5 clean it from stuck grains in it over the entire area of the sieve 1.

Claims (2)

1. A device for sifting bulk material, including flat sieves, parallel to each other, one below the other with the possibility of reciprocating movement, on the lower of which there are fixed transverse partitions, perpendicular to the longitudinal axis of the sieves, and longitudinal partitions forming, with the transverse partitions, cells, cleaning balls located in the cells, characterized in with The purpose of improving the screening efficiency and device performance is that the lower sieve is connected to the upper one by means of vertical elastic plates and is installed with the ability to control the amplitude of its oscillations relative to the upper sieve, the longitudinal partitions are located at an acute angle to the transverse partitions, and the cleaning balls are made tinplate 2. Device pop. 1, characterized in that the transverse side of the cell formed by longitudinal and transverse partitions is longer than its longitudinal side. J d four E g Fy  WadA I FIG. five