RU2298440C2 - Cleaner of the plane screens - Google Patents

Abstract

FIELD: agricultural machinery industry; production of the grain-cleaning machines.

SUBSTANCE: the invention is pertaining to the agricultural machinery industry, in particular to production of the grain-cleaning machines for cleaning and grading of seeds of crops. The cleaner of the plane screens includes the frame located in the screen boot between the screen and the supporting grate divided by the slats into the square or rectangular cells with the located in them cleaning components, and the installed with the possibility of vibration together with the screen boot and the free reciprocating motion with respect to the screen boot. The stop components are made out of the elastic material. The stop components are consolidated on the butt walls of the screen boot, the supporting grate is made out of the bars and the cells of the frame are formed by the longitudinal and transversal slats. At that the longitudinal slats are made with the height exceeding the height of the transversal slats and rest on the bars of the supporting grate with the possibility of the free relocation of the frame concerning the screen boot from one supporting component to anther by the value of no less than the half of the diameter of the cleaning components made in the form of the hollow flexible cylinders or beads. At that the diagonal size of the cylinders or the diameter of the beads is made smaller, than the gap of the under-screen space. The technical result of the invention is the increased efficiency of the screens cleaning and simplification of the screen cleaner design.

EFFECT: the invention ensures the increased efficiency of the screens cleaning and simplification of the screen cleaner design.

2 cl, 1 dwg

Description

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

For cleaning sieves from grains stuck in them, ball cleaning of sieves is becoming more widespread. Its main disadvantage lies in the fact that at a distance of less than half the diameter of the balls from the transverse and longitudinal strips of the sublattice, there are uncleaned zones. To achieve complete cleaning of the sieves, it is necessary to exclude uncleaned zones.

Known cleaner flat sieves, including located under the sieve frame for securing the axes with rings and support strips mounted under the frame parallel to the axes, undulating and at a minimum distance from the frame under the axes with rings, and the housing is made with guides in which the frame is movably mounted and the rings are located with the possibility of interaction with the support strips (A.S. No. 1816518 A1, B07B 1/54, 05.23.1993).

The disadvantage of this cleaner is the presence of a drive, which complicates the design of the sieve mill, as well as the possibility of rings being selectively positioned, i.e. shift to one side, snuggling tightly against each other and thereby reducing the cleaning effect.

The closest in technical essence and the achieved result is a ball sieve cleaner, including a frame located in the sieve mill between the sieve and the supporting grate, divided by strips into square or rectangular cells with cleaning elements located in them, and installed with the possibility of oscillation together with the sieve mill and free reciprocating movement relative to the sieve mill, thrust elements made of elastic material (Patent RU 2014160 C1, B07B 1/50, 06/15/1994).

Due to the reciprocating movement of the frame relative to the sieve, there are no uncleaned zones on the sieve, but at the same time, this design has a significant drawback - the complexity of the design due to the need for suspensions for an oscillating frame. In view of the small size of the under-sieve space, the pendants must have a sufficiently large length and a consistent mode of vibrations of the sieve mill and frame.

The technical result from the use of the claimed invention is to simplify the design of the sieve cleaner.

The technical result is achieved in that in a cleaner of flat sieves, including a frame located in the sieve mill between the sieve and the supporting grate, divided by strips into square or rectangular cells with cleaning elements located in them and installed with the possibility of oscillation together with the sieve mill and free reciprocating movements relative to the sieve mill, thrust elements made of an elastic material, according to the invention, thrust elements are fixed on the end walls kach sieve mill, the supporting grid is made of rods, and the frame cells are formed by longitudinal and transverse bars, and the longitudinal bars are made with a height greater than the transverse, and rely on the bars of the supporting grid with the possibility of free movement of the frame relative to the sieve mill from one stop element to another, at least half the diameter of the cleaning elements made in the form of hollow elastic cylinders or balls, while the diagonal size of the cylinders or the diameter of the balls less than the clearance of the subsurface space is made.

In this case, the frame is made of elastic material.

In the sieve mill, a frame is installed between the sieve and the supporting grate, consisting of longitudinal and transverse planks made of elastic material and forming square or rectangular cells to accommodate rubber balls or hollow cylinders of elastic material, the height of the longitudinal planks being greater than the transverse ones and the diagonal size of the cylinders or the diameter of the balls is less than the gap between the sieve and the supporting grid. The frame with longitudinal strips rests on the bars of the supporting grid.

When the sieve mill oscillates due to inertial forces, the frame with elastic cleaners, overcoming the friction forces of the longitudinal bars along the bars of the grate, starts moving relative to the sieve mill and at the same time vibrates with the sieve mill. In the process of movement, elastic cleaners, bumping with the bars of the grate, bounce and, bumping with the surface of the sieve, clean it of stuck grains. Moving the grate relative to the sieve mill during vibrations eliminates the uncleaned zones of the sieve without using special devices for driving the grating into oscillatory motion and its suspensions, which greatly simplifies the design of the sieve mill.

A comparison of the distinguishing features of the proposed and known technical solutions shows that the proposed set of features is new.

The drawing shows a schematic diagram of a cleaner flat sieves.

The sieve cleaner is installed in the sieve mill 1 between the sieve 2 and the supporting grid 3 with square holes. It contains a frame 4 with longitudinal 5 and transverse 6 strips, forming between themselves square or rectangular cells in which elastic cleaning elements are placed (rubber balls 9, hollow rubber cylinders 7, etc.). On the end walls of the sieve mill 1 are fixed thrust elements 8 of elastic material.

The proposed cleaner works as follows.

Grain heap is fed to sieve 2 and, when the sieve mill is oscillating, it moves along the sieve, being divided into two fractions: descent and passage. At the same time, part of the sieve holes are clogged with stuck grains. The cleaning of these holes is carried out by elastic cleaning elements 7 or 9, which make a random movement between the sieve 2 and the supporting grid 3 in the cells of the frame 4 due to the forces acting during the oscillatory movement of the sieve mill, and the stuck grains are knocked out of the holes. Moving the frame 4 from one stop element 8 to another when the sieve mill is oscillating eliminates the uncleaned areas of the sieve without the use of suspensions and devices for driving the grate.

The oscillation mode of the sieve mill should be such that the movement of the frame was not less than half the diameter of the cleaning element.

When a hollow rubber cylinder 7 is used as a cleaning element to prevent its jamming between the sieve and the supporting grate, the diagonal size of the element must be less than the clearance of the under-sieve space.

Claims (2)

1. Flat sieve cleaner, including a frame located in the sieve mill between the sieve and the supporting grate, divided by strips into square or rectangular cells with cleaning elements located in them, and installed with the possibility of oscillation together with the sieve mill and free reciprocating movement relative to the sieve mill , thrust elements made of elastic material, characterized in that the thrust elements are fixed to the end walls of the sieve mill, supporting the sieve a is made of rods, and the cells of the frame are formed by longitudinal and transverse bars, and the longitudinal bars are made with a height greater than the transverse, and rely on the rods of the supporting grid with the possibility of free movement of the frame relative to the sieve mill from one stop element to another, by at least half the diameter of the cleaning elements made in the form of hollow elastic cylinders or balls, while the diagonal size of the cylinders or the diameter of the balls is made smaller than the clearance wounds. 2. The cleaner according to claim 1, characterized in that the frame is made of elastic material.