Rotary type dry sieving device of soil applied to laboratories and dry sieving method

Abstract

The invention discloses a rotary type dry sieving device of soil applied to laboratories and a dry sieving method. The device comprises a base, a bottom tray, a group of sieving trays and a top cover which are successively in threaded connection with each other from bottom to top, wherein the base is a disc structure; a rotation motor is arranged at the center of the disc; an annular track is arranged at the edge of the disc; the bottom tray is a round basin structure; a group of rolling wheels which are uniformly distributed along the circumference are arranged at the periphery of the edge of the basin bottom and are in rolling connection with the rolling track; a bayonet connected with the rotation motor is formed in the sealed center of the basin bottom; the upper end surface of the round basin is opened; outer threads connected with the sieving trays are arranged at the edge of the basin; the sieving trays are cylinder structures; inner threads connected with the bottom tray and a sieving net are arranged on a lower end opening of each cylinder; the sieving nets are shaped as downward convex ball coronary; the upper end surface of each cylinder is opened; outer threads connected with other sieving trays or the top cover are arranged at the upper edge of each cylinder; the top cover is cone-shaped; the lower end surface of the cone is opened; the top of the cone is sealed; and a handle is arranged at the top of the cone. The device is few in parts and simple and convenient to assemble.

Description

technical field [0001] The invention relates to a laboratory rotary soil dry sieving device and a dry sieving method, belonging to the technical field of soil screening equipment. Background technique [0002] In laboratory soil experiments, it is often necessary to prepare soil samples with different particle gradations, which requires dry sieving of different levels of crushed soil. [0003] Fundamentally speaking, the basic principle of dry soil sieving is to provide some movement to the soil particles to generate a certain sieving speed or acceleration so that they can pass through the sieve and achieve the purpose of sieving. At present, the sieves of soil dry sieving equipment used in laboratories are all flat, and soil particles tend to gather towards the edge of the sieve during the sieving process, which affects the screening efficiency. Contents of the invention [0004] The purpose of the present invention is to provide a laboratory rotary soil dry sieving devi...

AI Technical Summary

Problems solved by technology

At present, the sieves of the soil dry sieving equipment used in the laboratory are all flat, and the soil particles tend to gather towards the edge of the sieve during the screening process, which affects the screening efficiency

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