A curved grid plate re-cleaning type three-cylinder sieve oat cleaning device

Abstract

The invention relates to the field of agricultural machinery, in particular to an arc-shaped grid plate re-cleaning type three-cylinder sieve oat cleaning device. It includes a casing, a three-drum sieve cleaning mechanism, a grained rod drum type threshing mechanism, a reselection mechanism and a collection mechanism; the three-drum sieve cleaning mechanism includes a fan installed at one end of the casing, and a fan installed at the other end of the casing. The position of the miscellaneous discharge port and the rotation of the three cylindrical screens arranged in the casing and between the fan and the miscellaneous discharge port; The arc-shaped grid plate is distributed in the casing between the cylinder screen with the smallest diameter and the miscellaneous discharge port, and the first conveying auger is distributed at the position below the cylinder screen with the smallest diameter and the arc-shaped grid plate, The second conveying auger is used to convey the sieve collected in the first conveying auger to the largest diameter drum screen. The invention can effectively reduce the impurity rate and loss rate of oat grain cleaning in the prior art.

Description

technical field [0001] The invention relates to the field of agricultural machinery, in particular to an arc-shaped grid plate re-cleaning type three-cylinder sieve oat cleaning device. Background technique [0002] At present, there is basically no combine harvester specifically for oat harvesting in the market. In addition to manual harvesting of oats, some farmers will choose to harvest oats with combine harvesters for other grains, which has caused great losses, and the impurity rate is also high. The required requirements cannot be met. When different crops are harvested with the same harvester, compared with other grains, oat grains lose more in the two parts of threshing and cleaning than other grains. Experiments have proved that the grain bar drum type threshing mechanism can minimize the loss of grains. Therefore, whether the cleaning part can meet the needs becomes an important step in the combined harvest of oats. [0003] The traditional centrifugal fan and cy...

AI Technical Summary

Problems solved by technology

[0003] The traditional centrifugal fan and cylinder sieve cleaning device cannot meet the requirements of the impurity content and loss rate of oat grains at the same time, and has the following disadvantages: (1) The chaff of the grains transported by the bar drum threshing mechanism to the cleaning device The falling area of ​​the mixture material in the cleaning device is small, and the cleaning efficiency is low for the oat grains containing more impurities, and the impurity rate is high; (2) When the material passes through the cylinder sieve, due to the cylinder sieve The rotating movement not only gives the grains but also the chaff debris a circular force, causing the chaff debris that should have been blown out to return from the bottom of the cylinder sieve and fall into the receiving plate into the grain collection box, which greatly increases the oat grain. Impurity rate; (3) Since the oat cleaning device of the centrifugal fan cylindrical sieve type does not have any parts or devices that prevent the grains from being blown away with the impurities, this results in serious loss of grains

To sum up, when cleaning oat grains with this type of cleaning device, when the impurity content meets the requirements, the loss rate will increase greatly; The needs of modern agricultural production

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