Multi-stage screening device

Abstract

The invention discloses a multi-stage screening device. The device comprises a screening tank, wherein a plurality of screening plates are arranged in the screening tank, and are arranged in an inclined and parallel manner; a plurality of screening holes are formed in each screening plate and are uniformly distributed; a feeding opening is formed above the higher side of each screening plate, is provided with a valve, and is connected with a main feeding pipe through a connecting pipe; a plurality of discharge openings corresponding to the screening plates are formed in the side face of the screening tank; a discharging blanking plate is arranged at the top end of each screening plate, and comprises a rectangular material receiving part and a ladder-shaped dispersing part; the bottom endsof the dispersing parts are connected with the screening plates; baffles are arranged on two sides of the material receiving parts and dispersing parts; each material receiving part is positioned under the corresponding feeding opening; and a plurality of separators are arranged on the dispersing parts and are distributed in a sector shape. The multi-stage screening device has a simple structure,strong adaptability and high screening efficiency.

Description

technical field [0001] The patent of the present invention relates to the field of mechanical processing, in particular to a multi-stage screening device. Background technique [0002] The vibrating screen is a kind of vibrating screening mechanical equipment suitable for screening fine-grained difficult-to-sieve materials and screening through the vibrator to drive the screen frame. It can screen and select stones, ores or chemical powders. Vibrating screens It has the technological characteristics of large amplitude, large vibration intensity, low frequency and elastic screen. [0003] The vibrating screen in the prior art includes a screen box and a multi-layer screen installed in the screen box. Each layer of screen is equipped with screen holes from the receiving end to the discharge end. The screen from the upper screen to the lower screen The hole size also gradually decreases. Taking the common three-layer screen vibrating screen in the prior art as an example, mat...

AI Technical Summary

Problems solved by technology

Since the sieve apertures of each layer of the vibrating screen are fixed, the gradation of materials with different particle sizes cannot be adjusted during the production process. When the gradation needs to be adjusted, part of the sieve layer can only be removed by stopping the machine. to achieve, resulting in time-consuming and labor-intensive screen mesh grading adjustment process, which increases the labor intensity of operators and affects production efficiency

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