Experiment device and experiment method for detecting flow regularity of granular mixtures in silo

Abstract

The invention discloses an experiment device for detecting flow regularity of granular mixtures in a silo. The experiment device comprises a support mechanism, a silo main body arranged on the support mechanism, and a supply mechanism for supplying granular mixtures for the silo main body. The silo main body comprises a positive organic glass barricade at the front part, a rear organic glass barricade at the rear part, left and right side plates located at two sides, and a discharge mechanism located at the bottom. The positive organic glass barricade is provided with scales I and the rear organic glass barricade is provided with strain gages used for monitoring pressure change of points of the organic glass barricades in granular mixture flowing. The positive organic glass barricade and the rear organic glass barricade are transparent organic glass plates. The experiment device realizes visual and convenient research on flow regularity of granular mixtures in a silo and prevents influence caused by place, equipment and personnel safety on an on-site test thereby preventing measurement data errors.

Description

technical field [0001] The invention belongs to the field of testing the flow law of granular bodies in underground mining ore-drawing and silo loading and unloading processes, and in particular relates to an indoor experimental device and method for testing the moving zone range and side wall pressure during the flow process of silo granular bodies . Background technique [0002] In recent years, with the continuous development of bulk material storage and transportation in the direction of fast, quantitative and accurate, silos and hoppers have been widely used in metallurgy, chemical industry, coal, grain and other industries. Many problems have also been found during use, such as the blockage of the discharge port by the particles, the wear and tear on the silo wall, etc. In order to study the above problems, it is necessary to understand the flow characteristics of bulk materials. Since its flow is more complicated than that of liquid and solid, its in-depth study is ...

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Problems solved by technology

However, a large number of practices have proved that the empirical formula method (Janssen formula) is quite different from the actual test results, and even some calculations are contrary to engineering phenomena; the field test is restricted by conditions such as site, equipment and personnel safety (especially large chute and large tube warehouse), it is often difficult to carry out on-site operation, and the results are highly discrete, so it is not suitable for analysis and research; numerical simulation is the main means of utilization at the present stage, but due to the friction coefficient between particles and between particles and the well wall is difficult Determined, so the results can only be used for qualitative analysis and cannot be used as the main basis for design

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