Automatic screening instrument applicable to fine particle cluster and use method of instrument

Abstract

The invention discloses an automatic screening instrument applicable to a fine particle cluster and a use method of the instrument. The instrument comprises a screening box, wherein a screening device and a weight measuring device are arranged in the screening box, and the screening device comprises a plurality of separating screens; the weight measuring device comprises a sensing upper loop, a sensing lower loop and a pressure spring; a fine particle cluster and water are poured into the screening box together and pass through multiple layers of separating screens, and weight measuring is further carried out on particles insulated on each layer of separating screens. Compared with the prior art, the automatic screening instrument applicable to a fine particle cluster and the use method of the instrument can carry out layered filtering and screening on sand particles of different particle sizes, and then can carry out layered weight measuring, thus being further improved in accurate measurement on fine-grained soil and being suitable for use in laboratories.

Description

technical field [0001] The invention relates to a separator and its use method, in particular to an automatic sieving instrument applicable to fine particle groups and its use method, and belongs to the technical field of sieving and analysis of granular materials. Background technique [0002] The existing sieving methods for the fine particle group mainly include the density meter method and the pipette method. In the measurement process, both methods have defects of varying degrees. First of all, the density meter itself has a certain manufacturing error. Excluding this factor, even an accurate density meter will often stick to the surface of the density meter because of the large volume of the floating bubble and more contact surfaces with the suspension. Layer suspension, can not completely return to the suspension. However, it needs to be picked and placed several times during the measurement, so that several times of sticking will cause a small amount of particle los...

AI Technical Summary

Problems solved by technology

First of all, the density meter itself has a certain manufacturing error. Excluding this factor, even an accurate density meter will often stick to the surface of the density meter when it is taken out because the volume of the bubble is large and there are many contact surfaces with the suspension. Layer suspension, can not completely return to the suspension

However, it needs to be taken and placed many times during the measurement, so that several times of sticking will cause a small amount of particle loss in the suspension

At the same time, taking and placing the density meter will also cause certain disturbances to the sample.

When the pipette method draws the suspension, due to the effect of suction, the suspension will flow to the pipette. During the flow, its motion speed will increase sharply, and the Reynolds number Re will become larger, which may make the motion of the water flow turbulent. state, so that the calculated percentage of soil mass smaller than a certain particle size is obviously too large

However, the existing sieving method cannot separate the fine-grained soil with a particle size less than 0.075mm due to the limitation of the pore size; and the limitation of the medium (air, non-enclosed environment) and the manual quality measurement method makes the fine-grained soil also result in a small disturbance. loss

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