Construction waste dual-crushing and screening device

Abstract

The invention discloses a construction waste dual-crushing and screening device which comprises a base, wherein a crushing box is fixedly arranged on the base through a bracket; a sieve plate is fixedly arranged in the crushing box; support plates are arranged on left and right sides of the top of the base; a top plate is arranged at the tops of the support plates; a U-shaped plate is fixedly arranged at the bottom of the top plate; a hydraulic cylinder is further arranged at the bottom of the top plate; the bottom end of the piston rod of the hydraulic cylinder is rotatably connected with a first mounted bearing; a spline shaft is fixedly connected with the bottom of the first mounted bearing; a compression spring is connected onto the spline shaft in a sleeving manner; a second mounted bearing is further arranged at the bottom of the U-shaped plate; a rotary sleeve is rotatably connected below the second mounted bearing; a first gear is mounted on the rotary sleeve; smashing blades are further mounted on the spline shaft; and the bottom end of the spline shaft is rotatably connected with a crushing plate through a bearing. According to the construction waste dual-crushing and screening device, construction waste is first extruded and crushed by the crushing plate, and then, the crushed construction waste penetrates through through holes in the crushing plate to be crushed by the smashing blades rotating at a high speed, so that the construction waste is more sufficiently crushed.

Description

technical field [0001] The invention relates to the field of construction machinery, in particular to a double crushing and screening device for construction waste. Background technique [0002] With the improvement of urbanization and the continuous transformation of old urban areas, old buildings are demolished almost every day, and most of the construction waste is transported to the suburbs or villages without any treatment, and is piled up or landfilled in the open air. It not only consumes a large amount of land and construction costs such as land acquisition, but also causes a huge waste of resources. If these building demolition objects can be reused, the high cost of handling will be avoided, the cost will be saved, and it can be remade into concrete for on-site reuse. [0003] Ordinary construction waste crushing devices generally use extrusion crushing, but the general extrusion crushing efficiency is low. The crushed construction waste is not screened, and the c...

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Problems solved by technology

[0003] Ordinary construction waste crushing devices generally use extrusion crushing, but the general extrusion crushing efficiency is low. The crushed construction waste is not screened, and the crushing effect is difficult to meet the requirements. However, due to the different sizes of construction waste, if the crushing blades are used directly to rotate Crushing may also bring a large load to the crushing blades, causing the device to fail to work, and even cause damage to the crushing device. The applicability is poor, and there are certain defects in both extrusion crushing and rotary crushing.

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