Sand screening facility capable of scraping sand on belt and characterized by being adjustable in separation distance between scraping plate and belt

Abstract

The invention discloses a sand screening facility capable of scraping sand on a belt and characterized by being adjustable in the separation distance between a scraping plate and the belt. The sand screening facility structurally comprises a sand scraping device, a supporting frame, a finished product sand conveying device, a discharging drum, a drum screen, a raw material feeding belt conveyor and a raw material storage hopper. The drum screen is arranged on one side of the supporting frame. Compared with the prior art, the sand screening facility has the beneficial effects that the sand which is kept on the belt can be timely scraped, the phenomenon of accumulation of the sand is effectively avoided, and therefore the sand conveying speed cannot be affected; the normal amount of sand canbe held in a screen drum, and therefore the electric energy is saved advantageously as the screening efficiency is improved, and then the screening cost is reduced; meanwhile, the phenomenon that dueto accumulation of the sand, the flowing sand slides to a rotating shaft can be avoided, the phenomenon that the rotating shaft gets stuck is avoided, the belt can normally supply materials, and theconstruction progress is not affected; and the gap between the sand scraping plate and the belt is adjustable, sand scraping operation is more facilitated, the sand scraping plate is convenient to replace and install, and sand discharging operation is also thorough.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a sand screening device capable of scraping sand on a belt and having an adjustable distance between the scraper and the belt. Background technique [0002] Sand is the main material for concrete and mortar. Because sand has different thicknesses, different specifications of sand are required for different construction conditions. Therefore, it is necessary to screen the sand, which is often screened by a drum type sand screen machine. When screening, the raw materials pass through The feeding belt is put into the horizontal screen drum for screening. In the raw material transportation, due to the imperfect technology of the existing drum sand screen machine, the following defects need to be improved: [0003] 1) During the construction of the construction site, the drum type sand screening machine and the sand are placed in the open air. Because the air contains wa...

AI Technical Summary

Problems solved by technology

[0003] 1) During the construction of the construction site, the drum type sand screening machine and the sand are placed in the open air. Because the air contains water vapor, when the water vapor content in the air is supersaturated, the sand will condense with water vapor, which makes the sand contain water. The sand will be stuck on the belt due to superimposition, resulting in sand accumulation, which makes the sand transport slow, so that there is less sand in the screen cylinder, and the screening amount is small, and the screening time is long, so the screening efficiency is low. In addition, it needs to consume More power, high screening cost;

[0004] 2) Raw materials are put into the horizontal sieve cylinder for screening through the feeding belt. This transportation is from bottom to top. When the sand accumulates a lot and is transported to a high place, the sand will slide up and down, and may slide down on the rotating shaft of the feeding belt conveyor On the other hand, when a lot of sand is accumulated, the shaft of the feeding belt conveyor will be stuck, so that the material cannot be fed normally, which will affect the sand screening progress and construction progress.

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