LOW-PROFILE MOBILE SORTER WITH SHAKE TABLE AND SCREW BRUSH FOR SIZING FORAGE PEAS AND CEREALS.

Abstract

La présente Addition concerne la combinaison d'un système de nettoyage du grain avec grilles longues et ventilation inspiré du tarare classique, avec une brosse vis et sa grille fixe semi circulaire, laquelle est raclée mécaniquement pour éviter son obturation par les grains cassés. Elle comporte un moteur électrique indépendant (1) qui commande le ventilateur axial (3) dont le courant d'air passe entre les grilles (5) et (6) pour éliminer les menues pailles et poussières. Ces grilles sont animées par 2 excentriques situés à chaque extrémité de l'arbre du ventilateur. Le chargement est opéré latéralement dans la trémie (4). Les grains entiers et cassés tombent alors en bas de la grille semi circulaire fixe amovible boulonnée sous la brosse vis (8) pour l'élimination des grains cassés. La brosse vis est commandée par le moto réducteur (2). Un dispositif réducteur par pignons à chaine inégaux avec balancier et bielle (10) permet l'animation du racleur caoutchouté (9) qui subit un mouvement de va et vient en pivotant à chaque extrémité de l'arbre de la brosse vis. A noter que toutes les grilles sont interchangeables.

Description

This addition concerns improvements made to the Patent filed on 18 / 10 / 89 by the applicant under the same title and registered under Number 89 13727. It concerns a low-profile mobile sorter intended mainly for sorting fodder pea and cereal seeds on the farm, whereas conventional sorters are high and fixed, requiring the presence of an elevator to feed them. Unlike the original design described in the main patent and the first addition, the present invention comprises two long, alternating longitudinally moving grids at the top (when the upper grid advances, the other retracts). These grids are driven bilaterally by two connecting rods with eccentrics fixed to the end of the shaft of a four-bladed fan, which is driven (500 to 600 rpm) by an independent motor. The airflow circulating between the two grids eliminates straw or light impurities that pass through the first grid (oblong holes for grain). The second grid (preferably equipped with round holes) retains these light impurities for more effective removal. Whole and broken grains, after passing through the first two flat, rotating screens, fall into a fixed semi-circular screen at the bottom. Inside this screen, a screw brush, approximately 250 mm in diameter, rotates at about 40 revolutions per minute. This screw brush is driven by a geared motor. The movement of the nylon bristles, arranged in spirals, is designed to move the grain and even lift it into the slightly inclined, fixed semi-circular screen. Broken or undersized grains then pass through the holes in the trough screen, the perforations of which have been determined according to each grain size. They are collected in a chute inclined parallel to the screw brush and fixed semi-circular screen assembly and slide downwards into a receiving tray designed for this purpose. To prevent broken grains from becoming trapped as they pass through the perforations of the fixed semi-circular screen, the screen is swept along its entire path by a flexible rubber scraper (or brush) that pivots at each end of the auger shaft. The back-and-forth sweeping motion is controlled by a device located at the lower end of the auger brush. This movement is achieved at low speed by a chain drive: a small gear at the end of the auger brush shaft drives another gear four or five times larger, which is equipped with a nylon cam inside which slides a steel rod connected to a fixed pivot point located a certain distance from the frame. As the cam rotates at low speed, it forces a back-and-forth motion on the steel rod, which is connected at its lower end to the scraper mechanism by a connecting rod. This automatic cleaning element was essential for the ratio to improve the device and make the most of it, some broken or imperfect grains pushed by the bristles of the nylon brush, which tend to get stuck these are at the passage of the perforations in the semi-circular grid. The invention will be better understood upon reading the following description. linking you to the attached drawings which schematically represent an example of implementation Figure 1 shows an overall view; the upper half shows the winnowing machine: grids and fan, the lower half The screw brush device with its automatic cleaning device for the semi-circular grid at the end of the screw. Figure 2 shows us the automatic cleaning device of the lower semi-circular grid with indication of the different positions of the whole. Figure 3 shows an overview of a sorting station and treatment within the scope of the invention. Referring to figure 1, we will note in (1) the electric motor which drives the opposite side of the 4-bladed fan (3) which propels, via 2 eccentrics at the ends of the shaft, the shaking table with its 2 removable grids (5) and (6) which by a system of pendulum have an opposite movement to avoid vibrations, the electro-reducer (2 drives by chain the screw brush (8) located at the lower level of the interior the semi-circular grid which must eliminate broken grains which fall into the chute (ll) and slide into a receiving tray tion. The supply can be made laterally to the vibrating hopper (4) being attached to the upper shaking table. To facilitate moving the apparatus, two handles (7) allow the sorter which rests on two wheels. In (9) the scraper device which pivots at each end of the screw brush shaft to clean the grid The semi-circular mechanism is driven by the device (10). The receiving chute (11) (shown in transparency) allows the grains to be collected. As they fall from the semi-circular grid, they slide and can be detached. poured into a tray on the floor. Figure 2 shows us, in two positions, the principle of the device. cleaning the semi-circular grid using a scraper The flexible shaft allows the extraction of grains stuck in the slots. The small pinion (12) fixed to the end of the screw brush shaft drives the large pinion (13) at reduced speed via a chain. The nylon or Ertalon cam (14), which pivots on the periphery of the pinion (13), is pierced transversely by a round drawn steel rod (15), which pivots in its upper part at a fixed articulated point (16). The lateral reciprocating movement is transmitted by the adjustable bracket (17) to the connecting rod (18), which actuates the scraper device (19). Note the two extreme positions of the scraper device, left position in solid lines, right position in dotted lines. Figure 3 shows a schematic plan view of a grain sorting and processing unit. The skip (20) discharges the grain to be sorted and processed via a special chute onto the side of the sorter (21), which discharges the calibrated grain into the receiving hopper of a soft-bottom screw (22) (as a non-limiting example), the grain rising directly into the trailer (23) after processing; Note that this sorter is adjustable in tilt and height, and the ventilation is also variable. All the grids are interchangeable.

Claims

DEMANDS 1 - Combination of a device having two long grids shaken longitudinally with opposite movement with axial fan inspired by the classic winnowing fan to perfect the cleaning of seeds on the farm, on the one hand, with a screw brush rotating at about 40 revolutions per minute inside a semi-circular grid on the other hand, according to claim 1 of the main Patent. 2 - Device according to claim 1 relating to shaking the two upper grids from the two ends of the fan shaft, characterized in that the latter is provided with an eccentric at each end to jointly actuate the control rods. 3 - A device according to any one of the preceding claims, characterized in that, with the receiving hopper being in the center, the grain is fed from the side of the apparatus. The tipping hopper containing the waiting grain is provided with a special chute so that the discharge occurs at the top and center of the upper screen. n 4 - Device according to claim 1 of the main Patent concerning the mechanization of the external scraping system of the semi-circular grid by a bar with a rubberized edge pivoting at each end of the screw brush shaft, characterized by the presence of a speed reduction assembly: the screw shaft (at the lower end) is provided with a small chain sprocket which transmits a reduced rotation to another large diameter sprocket which drives an eccentric nylon cam which is crossed by a steel rod which pivoting at a fixed articulated point at the top transmits a lateral back and forth movement to the connecting rod which controls the scraper.