Laboratory particle screening equipment

Abstract

The invention provides laboratory particle screening equipment. The laboratory particle screening equipment comprises a connecting mechanism, multiple screening units and multiple weighing units, wherein each screening unit comprises a corresponding outer barrel, a corresponding inner screening barrel, a corresponding sealing piece, a corresponding hopper, a corresponding conveying mechanism and a corresponding connecting mechanism; the inner screening barrels are arranged in the outer barrels, the axes of the inner screening barrels are parallel to the axes of the outer barrels, and the inner screening barrels have the freedom degrees of rotating around the axes of the inner screening barrels, and are provided with screen holes; the apertures of the screen holes in the screening units on the upper layers are larger than those of the screen holes in the screening units on the lower layers; the sealing pieces are arranged between openings of the outer barrels and the outer wall surfaces of the inner screening barrels; the hoppers are arranged at the openings of the outer barrels; the conveying mechanisms are arranged in the inner screening barrels; the connecting mechanisms are in butt joint with the conveying mechanisms; and the weighing units is in butt joint with the hoppers. According to the laboratory particle screening equipment, manual screening is not needed, time and labor are saved in operation, and screened particles with various particle sizes can be collected respectively, so that the screening test process is more efficient.

Description

technical field [0001] The invention belongs to the technical field of screening equipment, and in particular relates to a laboratory particle screening equipment. Background technique [0002] Indoor experiments are an important part of scientific research. With the gradual deepening of experts and scholars' research on some issues, the research on indoor experiments is developing towards refinement. In order to more realistically simulate and restore the stress state of each object in the actual project, it is often necessary to use soil media to complete the test. Regarding the soil medium, many test results have confirmed that the impact of particle size on the test cannot be ignored. Although many experts and scholars have conducted a large number of experimental studies on the influence of particle size pairing test results, the impact mechanism of particle size pairing test and the mechanical behavior of particles between gradations are still unclear, so a large numb...

AI Technical Summary

Problems solved by technology

[0004] At present, most of the sieving tests are manual sieving, not only the process is cumbersome, but also the efficiency is slow. At the same time, the sieving process needs to be separated and stacked according to different particle sizes, and it is very easy to confuse the specific operation.

At the same time, some tests take into account the influence of the boundary effect and size effect of the test chamber. The size of the test chamber is generally large. In order to ensure the degree of compaction, more granular materials are needed, and purely rely on manual screening or traditional screening. The equipment is used for sieving, and the particle samples that may be obtained in one sieving test are far from enough for the soil volume of the experiment, so multiple sieving is required, which seriously reduces the test efficiency

In addition, after a period of use, the particles will be broken due to the force, which will cause a certain change in the gradation. It is time-consuming and laborious to use the traditional method to detect whether the particle gradation meets the test requirements.

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