Screening device and method for detecting reliability of gradation property of granular material

Abstract

The invention discloses a screening device and method for detecting the reliability of a gradation property of a granular material. The screening device comprises a base plate, an elastic vibration module, a vertical column, a frame beam, a vibration table, and a screening box, wherein the elastic vibration module is mounted on the base plate, the vibration table is mounted on the elastic vibration module, and the screening box is arranged on the vibration table; the upper part of the frame beam is fixedly providedwith a feeding box, and an outlet of the feeding box extends into the screeningbox; the vertical column is provided with a bearing platform, and the bearing platform is provided with a plurality of material storing boxes, and a discharging port of the screening box is aligned with feeding openings of the material storing boxes; and the screening box is divided into a plurality of cells by a plurality of horizontally arranged screening hole plates from bottom to top, whereinthe screening hole aperture of one upper screening hole plate is larger than that one lower screening hole plate, the discharging opening of each cell is correspondingly provided with a material storing box; the vibration table is arranged to incline to one side, the feeding box is located on the higher side of the vibration table, and the material storing box is located on the lower side of the vibration table. The screening device is quick and convenient to use, and precision is reliable.

Description

technical field [0001] The invention relates to a sieving apparatus and a sieving method for detecting the reliability of gradation characteristics of granular materials, in particular to a sieving apparatus capable of intelligently tracking and analyzing the particle size of granular material samples and the reliability of their distribution characteristics. Background technique [0002] Granular materials widely exist in nature, daily life and production and technical fields, such as: sand and gravel in nature, soil, grains, sugar, salt, medicine in daily life, and various ores and coal in production and technical fields Building materials such as lime, fly ash, etc. are all particulate matter. [0003] The bulk properties of granular materials mainly include particle size, shape, surface area, and magnetic, electrical, and optical properties of particles. The particle size is an important basis for classifying granular materials, and it also has a significant impact on v...

AI Technical Summary

Problems solved by technology

For example, when the total number of particles is huge and the particle size distribution range is wide, if the sampling volume is insufficient, the particle size and its distribution characteristics determined by the sieving test cannot represent the particle size distribution characteristics of the particle population; When the amount is too much, it means that the engineering amount is gradually increasing, which will not only cause too much material in the screen box, reduce the screening efficiency, but also cause a lot of waste of manpower, material resources and other resources in the screening test process. It shows that when the sample size reaches a certain limit, continuing to increase the sample size has little effect on improving the accuracy of the test results

[0005] To sum up, in order to determine the overall particle gradation distribution of granular materials, how many samples need to be taken for sieving tests to objectively and accurately reflect the overall particle gradation distribution characteristics? Clearly, relevant scientific research has rarely been reported

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