Agricultural three-stage cereal screening device

Abstract

The invention discloses a three-stage screening device for agricultural grains, which comprises a screening box installed on a frame, the screening box is fixed on the upper end of the frame, and a material inlet is provided in the middle part on the left side of the top of the screening box. There is an auger feeding mechanism at the butt joint of the feed port; a blast pipe is provided on the right side of the feed port, and the blast pipe is connected with an external blower; inside the screening box, a coarse screen and a fine screen are installed at intervals from top to bottom. net; on the right side of the screening box, there are first sundries outlet, grain outlet and second sundries outlet; a shock-absorbing base is installed in the middle of the bottom end of the frame, and a vibration motor is fixed on the shock-absorbing base, and an eccentric connection The rod assembly connects the vibrating end of the vibrating motor with the bottom of the bottom plate of the screening box. The left side of the screening box is provided with a suction pipe, and the inner end of the suction pipe communicates with the inside of the screening box through multiple suction ports, and the outer end is connected to the bag filter. butt.

Description

technical field [0001] The invention relates to the field of agricultural machinery and equipment, in particular to a three-stage screening device for agricultural grains. Background technique [0002] At present, after the grain is harvested, impurities such as stones and sand are often mixed into the grain, which affects the overall quality of the grain. Therefore, the grain screening machine is usually used to clean the grain and separate large impurities such as stones and sand grains in the raw materials. However, during the use of the existing drum-type grain screening machine, because the angle of the screen drum is mostly fixed, it cannot be adjusted according to different materials and different cleaning requirements, resulting in unsatisfactory screening effect. The shriveled grains, drum skins, wheat ear silk mixed in the grain grains and the dust wrapped in the finished product flow cannot be effectively separated. [0003] In addition, due to the many impuriti...

AI Technical Summary

Problems solved by technology

Most of the existing vibrating cleaning sieves for grain screening only have the function of one-level grading and screening, and the material grading degree is low. Sometimes multiple devices are used for sieving in series to achieve multi-grain size grading, which greatly wastes space resources and increases costs.

It is not possible to efficiently complete the grading and screening

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