Cereal screening device

Abstract

The invention relates to the technical field of agricultural production, and discloses a cereal screening device. The cereal screening device comprises a frame, a feeding hole and a discharging hole,wherein the feeding hole is formed in the upper end of the frame; the discharging hole is formed in one side of the frame; and semi-cylindrical screening cylinder and a driving structure for driving the semi-cylindrical screening cylinder are fixedly arranged inside the frame. According to the cereal screening device, a screening structure is arranged reasonably, and the screening flow is optimized. Smaller impurity particles and lighter grain husk are screened firstly by winnowing and screening, then larger and heavier particles are screened by winnowing and inertia screening, and the impurities and particles are greatly different on the aspects of size and quality during twice, so that a better screening effect is achieved. Meanwhile, the cereal screening device is simple in structure, and is high in reliability. Internal circulation is created at the upper end of the frame, and the blown impurities move inside the frame and are discharged from the impurity outlet at the lower end during first-step screening of lighter impurities, so that the noise and flying dust in the screening process are reduced.

Description

technical field [0001] The invention relates to the technical field of agricultural production, in particular to a grain screening device. Background technique [0002] Rice and wheat are daily staple foods. After harvesting, farmers need to screen the dried grains to remove dust, rice husks, straw, etc. mixed in the grains. The grain is stored in the granary. [0003] There are many types of grain screening devices on the market, usually through vibrating screens, air selection, water selection or inertial selection. It is difficult to remove impurities with a diameter similar to grains through vibrating screens, and at the same time it will generate relatively loud noises, while air selection and water selection The cost of selection is relatively large, and more grains will be removed, while the equipment for inertial selection is usually more complicated and the cost is higher. [0004] Secondly, because the dried grains usually contain more dust, the existing machines...

AI Technical Summary

Problems solved by technology

[0003] There are many types of grain screening devices on the market, usually through vibrating screens, air selection, water selection or inertial selection. It is difficult to remove impurities with a diameter similar to grains through vibrating screens, and at the same time it will generate relatively loud noises, while air selection and water selection The cost of selection is relatively large, and more grains will be removed, while the equipment for inertial selection is usually more complicated and the cost is higher

[0004] Secondly, since the dried grains usually contain a lot of dust, the existing machines will raise the dust when they are screened, making the working environment bad and not conducive to the health of farmers

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