A corn grain grading and screening device with good screening effect

Abstract

The invention provides a corn-grain grading screening device with a good screening effect. The grading screening device comprises a base, a feeding hopper, a first driving mechanism, a screening box, a second driving mechanism and a third driving mechanism. The screening box is installed on the base, the feeding hopper is used for quantitative feeding to the interior of the screening box, a first screening device body and a second screening device body are arranged in the screening box, and the first screening device body is located on the second screening device body; the first screening device body comprises a first rotating disc and a first screening plate which are horizontally arranged, the second screening device body comprises a partition plate, a second screening plate and a third screening plate, and the third screening plate is located below the second screening plate; and the second driving mechanism is connected with a first plate and a third plate, the third driving mechanism is connected with a second plate and a fourth plate, and the second driving mechanism and the third driving mechanism are used for driving the second screening plate and the third screening plate to vibrate up and down. The grading screening device is simple in structure and thorough in screening; and as the screening process is carried out in the completely-sealed box, dust can not be generated, and the corn grains with different full degrees can be separated.

Description

technical field [0001] The invention relates to the technical field of agricultural machinery, in particular to a corn grain grading and screening device with good screening effect. Background technique [0002] At present, after the corn is harvested and threshed, impurities such as husks and sand grains are often mixed in the corn, which affects the overall quality of the corn. There are usually two kinds of existing screening methods: one is the method of manual screening, which has the disadvantages of high labor intensity, high cost, low work efficiency, and low sieving clarity of corn; the other is the method of using a corn screening machine. The method has the disadvantage of high cost of purchasing the equipment due to the complex structure of the corn screening machine. In addition, due to the large amount of impurities in the corn, a large amount of dust will appear during the screening process, which will affect the health of the operators. Contents of the inve...

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Problems solved by technology

[0002] At present, after corn is harvested and threshed, impurities such as hulls and sand are often mixed into the corn, which affects the overall quality of the corn.

There are usually two kinds of existing screening methods: one is the method of manual screening, which has the disadvantages of high labor intensity, high cost, low work efficiency, and low sieving clarity of corn; the other is the method of using a corn screening machine. method, this method has the disadvantage of high cost of purchasing the equipment due to the complex structure of the corn screening machine. In addition, due to the large amount of impurities in the corn, a large amount of dust will appear during the screening process, which will affect the health of the operators

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