Concrete crushing and screening device

Abstract

The invention discloses a concrete crushing and screening device which comprises a screen piece disc, a screen hole groove, a threaded seat and a bolt rod, so that after aggregate is soaked, a plurality of adjustable upper-layer screen pieces parallel to the axis of a roller are arranged in a roller screen in the circumferential direction at equal intervals, and the hole diameter of the upper-layer screen pieces can be several times larger than the control granularity of an outer-layer main screen; the main effect is to prevent a large number of materials from being accumulated on the screen surface of the outer layer main screen mesh at the same time, the ball shifting balls are arranged on the upper layer screen piece, and when aggregates with different sizes are fed and discharged on the shifting balls, the aggregates can roll into the screening groove, so that the aggregates are effectively prevented from being clamped in the discharging groove, blockage and material clamping between the aggregates and the screen pieces are effectively reduced, and the screening efficiency is improved. And the situation that the sliding discharging operation of the aggregate is affected by crushed aggregate dust on the wave beads is prevented, the discharging speed during rotary screening can be controlled when the aggregate is stacked, and therefore the problem that screen holes are blocked when the screened material is screened is solved.

Description

technical field

[0001] The invention relates to the technical field of concrete recycling, in particular to a concrete crushing and screening device. Background technique

[0002] Concrete or cementitious concrete is a composite material formed by bonding fine and coarse aggregates with cement and hardening over a period of time. In the past, lime-based cements were most common, such as lime plaster, but hydraulic cements are sometimes used. Cement, such as calcium aluminate cement or Portland cement, non-cement-based concrete is different from other concretes in that it directly bonds various aggregates. Non-cement-based concrete includes asphalt concrete bonded with bitumen and polymers as Polymer concrete as a cementitious material, of which asphalt concrete is often used for pavement.

[0003] Currently, crushing and screening of waste concrete is often required when recycling waste concrete. In the prior art, mist spraying inside the sorting cylinder is often required ...

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