Multi-stage screening device for grain

Abstract

The invention discloses a multi-stage screening device for grain. The device comprises a shell, an inner working groove and a first discharging opening, wherein a motor is installed at the left end ofthe interior of the shell; a main gear and first auxiliary gears are connected with each other, and the first auxiliary gears are connected with a second auxiliary gear; a first screening mesh is installed on the sides, close to a power rod, of fixing rods; an outer working block is fixed to the side, close to the shell, of a middle ring; an inner working block is fixed to the side, close to thepower rod, of the middle ring; the left end of a baffle is fixed to the power rod, and the power rod is provided with a threaded piece; and the first discharging opening is arranged in the lower end face of the shell. According to the multi-stage screening device for the grain, the grain is placed in a structure with the screening function, so that the problem about insufficient screening of an existing device is solved; a pushing structure with the independent rotating function is designed, so that the problem of low screening efficiency is solved; and meanwhile, a structure with a reinforcing function is designed, so that the situation that the screening meshes are unstable in fixing is avoided.

Description

technical field [0001] The invention relates to the field of agricultural technology, in particular to a grain multistage screening device. Background technique [0002] Grain sieving refers to the sieving of grain seeds of different sizes. Generally speaking, the seedlings formed by large grain seeds are usually larger than the seedlings formed by small grain seeds. Under the same sowing conditions, the growth of seedlings of seeds of different sizes Growth and the formation of later yield have a great influence. Plants formed from grain seeds with larger grains grow vigorously, have larger reproductive volumes, and can obtain higher yields. [0003] With the continuous development of the field of agricultural technology, grain sieving has become an essential operation after harvesting grains. However, the existing grain sieving devices have insufficient sieving during operation, resulting in the mixing of grain seeds of different sizes. , The screening net is not fixed st...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-stage grain screening device to solve the problems of insufficient screening, unstable fixing of the screening net and low screening efficiency in the above-mentioned background technology

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