Fine sand screening device

Abstract

The invention discloses a fine sand screening device. The fine sand screening device comprises a box body, an impacting mechanism and a screening mechanism; the impacting mechanism is arranged in thebox body, and the impacting mechanism comprises a scattering disc and impacting teeth; tooth plates with circumferential distribution are perpendicularly and fixedly connected to the upper end surfaceof the scattering disc, a center shaft is fixed to the scattering disc in a sleeving mode, and the impacting teeth with circumferential distribution are uniformly distributed at the positions, located on the inner wall of the outer side of the scattering disc, of the box body; and the screening mechanism comprises a collection cover and a screening cover, the screening cover is arranged below thecollection cover, the screening cover is fixedly connected with a spiral screen plate in a spiral rising shape, and a slag collecting groove is formed below the screening cover. Sand blocks and the impacting teeth are impacted and crushed by arranging the scattering disc and the impacting teeth, and subsequent screening is facilitated; and the tapered screening cover and the spiral screen plate in a spiral rising shape are arranged to enable sand material comprising waste slag to roll in a spiral waste slag channel, sufficient screening is achieved, the removal rate of the waste slag is improved, the screening out rate of fine sand is improved, and thus, the screening effect is improved.

Description

technical field [0001] The invention relates to the field of construction equipment, in particular to a fine sand screening device. Background technique [0002] The sand sieving machine imitates the working principle of artificially using the inclined screen to screen sand. It adopts a flat rolling screen cylinder and ensures that the material flow can be continuously rolled for more than five circles between the multi-turn inner spiral blades in the screen cylinder, so that the sand material can be repeatedly screened. It is fully discrete and separated by tumbling and sliding; it is different from the pushing and burying of large and small materials caused by inclined roller sieves, and the screening process is rushed; it is also different from the vibration and mixing of large and small materials caused by inclined vibrating screens. [0003] The traditional sand sieving machine cannot handle the bonded sand blocks well. During the screening process, the sand blocks are ...

AI Technical Summary

Problems solved by technology

[0003] The traditional sand sieving machine cannot handle the bonded sand blocks well. During the screening process, the sand blocks are sieved out, crushed and put into the sand sieving machine again, which prolongs the working time. At the same time, during the screening process, they cannot be separated efficiently. Fine sand and waste residue, the screening effect needs to be improved

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