Grain second-level winnowing device

Abstract

The invention discloses a grain second-level winnowing device. The grain second-level winnowing device comprises a feeding barrel, a first air suction way located in the side direction of the feeding barrel and communicated with the lower portion of the feeding barrel, a first settling chamber located in the side direction of the first air suction way, a second settling chamber located in the side direction of the first settling chamber and a second air suction way located in the side direction of the second air suction way; the cross sectional area of the first settling chamber is larger than that of the first air suction way, the cross sectional area of the second settling chamber is larger than that of the second air suction way, and impurity collecting boxes are arranged below the first settling chamber and the second settling chamber; the middle of the first settling chamber and the middle of the settling chamber are separated through a separating plate capable of vertically moving, first frustums are arranged on the two sides of the separating plate, and vertical plates are arranged at the upper ends of the first settling chamber and the second settling chamber; and vertical plate inclined faces are arranged at the upper ends of the vertical plates, inclined plates for being supported on the vertical plate inclined faces are arranged at the upper portions of the vertical plates, the upper end faces of the inclined plates are provided with inclined plate inclined faces matched with the first frustums, and the inclined plate inclined faces abut against the first frustums.

Description

technical field [0001] The invention relates to a grain wind separation and impurity removal technology, in particular to a grain secondary air separation device. Background technique [0002] According to the difference in the aerodynamic properties of grain and impurities, the method of separating by air flow is called winnowing. Wind separation equipment used for grain cleaning is divided into external suction type and circulation type according to the treatment method of dusty air, blowing type and suction type according to gas pressure, and vertical type and horizontal type according to the direction of airflow movement. There is a secondary air separation device for grains, the main structure of which includes a feeding cylinder, a first air suction channel connected to the feeding cylinder, a first air suction channel located on the side of the first air suction channel and connected to the first The settling chamber is provided with a second settling chamber on the ...

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Problems solved by technology

[0003] The problems existing in the above-mentioned secondary air separation device for grains are: 1. After the grains that have been removed for the first time are collected, they need to be manually sent to the second air suction channel for secondary removal of impurities, which is cumbersome to operate and low in efficiency; 2. The cross-sectional area of ​​the settling chamber cannot be adjusted, so that it is impossible to select a settling chamber with an appropriate cross-sectional area according to the particle size of the impurities; 3. The adjustment of the outlet size of the settling chamber and the size of the air outlet are all through a separately set regulating valve Realized, complex structure, high cost and inconvenient adjustment

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