CS237021B1 - Device for reducing the content of impurities in harvested seed cultures - Google Patents

Abstract

The device is intended for harvesting seed crops, especially legumes, with intensive cleaning of seeds from unwanted impurities. At least part of the arched bottom of the harvesting table is perforated under the transverse screw conveyor.

Description

The invention relates to a device for reducing the content of impurities in harvested seed cultures, in particular legumes.

Existing machine harvesters harvest seed cultures with a considerable amount of undesirable impurities, in particular impurities and weed seeds. The harvested material has to be refined, which increases the costs of operation and energy consumption. Although a device is known in which a portion of the bottom of an inclined rotary conveyor is formed as a perforated surface, through which the dirt holes fall through, this device is capable of removing only part of the dirt from the harvested material. Indeed, only those impurities that do not go below fall through, others that are higher in the material layer do not have this possibility.

The device for reducing the amount of impurities in the harvested seed cultures according to the invention is able to ensure a high degree of purification and purity of the processed material which reaches the purification area so that all its layers come into contact with the separation point. The quality of work and efficiency of the equipment is therefore high and a considerable part of the purchase and operation costs, including energy, is saved.

An exemplary embodiment of the device according to the invention is shown schematically in the attached drawing, wherein Fig. 1 is a side view of the device in the basic embodiment and Fig. 2 is a side view of the device adapted for cases where increased cleaning is not needed.

Behind the mowing bar 6 of the harvesting table 1 is provided. A cross-worm conveyor 2. The harvest table 1 is arranged in front of a seed crop harvesting machine (not shown), for example a combine harvester, adapted for harvesting legumes. The transverse worm conveyor 2 of the harvesting table 1 is arranged in front of an inclined rotary conveyor 4 intended for transferring material further to a machine (not shown). Underneath the transverse screw conveyor 2, at least a portion of the arch bottom 3 of the harvesting table 1 is provided as a perforated surface which, if necessary, is covered by an arch cover 3 without holes.

The device according to the invention works as follows:

The harvested material picked up by the cutter bar B reaches the harvester table 1 and is folded in the middle by a transverse screw conveyor 2. In so doing, it is moved along the perforated portion of the arched bottom 3 through which impurities fall outside the harvester. Since the transverse screw conveyor 2 mixes the harvested material, partially carries it up and again falls down, another layer of the harvested material still reaches the perforated portion of the arched bottom 3, so that a large part of the dirt and impurities falls out. In the event that such an operation is not desirable in some crops, the perforated portion of the arch bottom 3 is covered by the arch cover 3, thereby allowing normal, only transport, operation of the cross-screw conveyor 2.

Claims (1)

psedmet Apparatus for reducing the amount of impurities in harvested seed crops, provided with a harvest table with a transverse screw conveyor, behind which a conventional conveyor is arranged, characterized in that a perforated arch bottom (3) of the harvest table (1) is arranged under the transverse screw conveyor (2j) .