Multi-stage rice screening equipment and screening method

Abstract

The invention provides multi-stage rice screening equipment. The multi-stage rice screening equipment comprises a power transmission device and a material screening device that are connected with eachother; the power transmission device comprises a main body rack as well as an eccentric slewing mechanism and a connecting bracket that are rotationally arranged on the main body rack; the multi-stage rice screening equipment is also provided with a motor and a gearbox; the material screening device comprises a vibrating bin, a separating screen and a rice discharging pipe; the separating screenis movably installed in the vibrating bin; and the eccentric slewing mechanism is driven to rotate by a power system so that the vibrating bin rotates to classify and screen the rice. The multi-stagerice screening equipment provided by the invention is simple in structure, convenient to use and stable in running; the multi-stage rice screening equipment provided by the invention is combined witha screening method to separate five grades of rice including intact rice, first-grade large broken rice, second-grade broken rice, intermediate-grade broken rice and small broken rice through continuous screening of different screening holes of four layers of separating sieves; the grading specification is standard; moreover, relatively light dust impurities in the rice are collected in a graded screening process; and thus a good dust removal effect is achieved, and the screening efficiency and quality are high.

Description

technical field [0001] The invention belongs to the technical field of rice processing equipment, and in particular relates to a multi-stage rice screening equipment and a screening method. Background technique [0002] In the production process of rice, it is necessary to go through the steps of dust removal and screening and separation of complete grains and incomplete grains of rice. The incomplete grains are divided into large broken rice and small broken rice. The large broken rice is used to make porridge or use For food processing, small broken rice can only be used for feed; there are usually two kinds of existing rice screening methods: one is the manual screening method, which has the advantages of high labor intensity, high cost, and low work efficiency. The second is the method of using a rice screening machine, which has the disadvantage of high cost of purchasing the equipment due to the complex structure of the rice screening machine. In addition, it is diffic...

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Problems solved by technology

[0002] In the production process of rice, it is necessary to go through the steps of dust removal and screening and separation of complete grains and incomplete grains of rice. The incomplete grains are divided into large broken rice and small broken rice. The large broken rice is used to make porridge or use For food processing, small broken rice can only be used for feed; there are usually two kinds of existing rice screening methods: one is the method of manual screening, which has the advantages of high labor intensity, high cost, low work efficiency, and the screening of rice The second is the method of using a rice screening machine, which has the disadvantage of high cost of purchasing the equipment due to the complex structure of the rice screening machine. In addition, it is difficult to make standard grading and screening for incomplete rice grains, which affects Screening efficiency and quality; in addition, because there are many dust impurities in rice, a large amount of dust will appear during the screening process, which will pollute the environment and affect the health of operators

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