Laboratory soil sample crushing and sieving device and laboratory soil sample crushing and sieving method

Abstract

The invention discloses a laboratory soil sample crushing and sieving device and a laboratory soil sample crushing and sieving method, and belongs to the technical field of laboratory soil nutrient determination and analysis preprocessing. The method comprises the steps that a soil sample enters crushing units via a sample inlet by a roller rolling crushing method; the soil sample is rolled and crushed by two soil rollers to reach a soil collecting base at the bottom; the soil sample is sieved by a sieve mesh in the base; and then the soil sample in a corresponding particle size is obtained. According to the device and the method, various inconveniences caused by manual laboratory soil grinding and sieving are avoided; the working efficiency is greatly improved; the workload of laboratory personnel is reduced; the device is closed, so that injuries of dust to an environment and a human body can be avoided; the device is compact in structure; the different crushing units and sieve meshes can be flexibly and freely assembled and selected; the soil samples in different particle sizes can be obtained; the shape that a cuboid is connected with two semi-cylinders facilitates wiping and avoids soil remaining in the device; and the method is easy and simple to operate and easy to master.

Description

technical field [0001] The invention relates to a laboratory soil sample pretreatment device, in particular to a laboratory soil sample crushing and screening device and a method thereof. Background technique [0002] my country is a large agricultural country. In 2013, the grain output reached 6,019.35 billion tons. With the intensification of agricultural production, the amount of chemical fertilizers has increased significantly. Statistics show that the amount of chemical fertilizers used in my country has reached 261kg hm 2 , ranking first in the world. On the one hand, the enrichment of soil nutrients leads to eutrophication of the soil; on the other hand, with the massive loss of nitrogen and phosphorus, more than 50% of the nitrogen and phosphorus in lakes in my country comes from agricultural sources, and agricultural non-point source pollution has caused nearly half of China's The eutrophication of lakes has increased year by year, even endangering the safety of dri...

AI Technical Summary

Problems solved by technology

However, the mechanism of the grinder is not closed, and there is still the problem of "dusty", and it is impossible to obtain soil samples of different particle sizes

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