A sieving instrument and sieving method for detecting the reliability of gradation characteristics of granular materials

Abstract

The invention discloses a sieving instrument and a sieving method for detecting the reliability of gradation characteristics of granular materials. The sieving instrument comprises a base plate, an elastic vibration module mounted on the base plate, a column and a frame beam, a vibration table mounted on the elastic vibration module, and a screen box arranged on the vibration table; the frame beam The upper part is fixedly equipped with a feeding box, and the outlet of the feeding box extends into the screen box; a bearing platform is installed on the column, and a plurality of material storage boxes are arranged on the bearing platform, and the outlet of the screen box Align with the feed inlet of the material storage box; the screen box is divided into multiple grids by a plurality of horizontally arranged sieve plates from bottom to top, and the sieve holes of the upper layer of sieve plates are larger than the sieve holes of the next layer. According to the sieve hole diameter of the orifice plate, there is a storage box corresponding to the discharge port of each grid; the vibration table is set on one side inclined, wherein the feed box is located on the higher side of the vibration table, and the storage box is located on the side of the vibration table. lower side. The sieving instrument of the invention is quick and convenient to use and has reliable precision.

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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