Screening device capable of vibrating parallel to screen plate and efficient screening method

Abstract

The invention discloses a screening device capable of vibrating parallel to a screen plate and an efficient screening method, and relates to the field of screening machines. The screening device is mainly composed of a main support, a screen box, a first movable frame, a second movable frame, a guide rod, an electromagnet, an exciting coil, a spring, a positioning bolt, a long pin, a feeding hopper, a screened object receiving hopper and an oversize product receiving hopper. According to the efficient screening method, the screen box is driven by the exciting coil and the electromagnet to vibrate along the screen plate face under the guide effect of the guide rod; the inclination angle theta, the screen hole diameter and screen hole distribution of the screen box are adjusted, and through control over the amplitude and the frequency of the electromagnet and the exciting coil, rapid slippage of particles on the screen plate can be achieved, and efficient screening is achieved. Accurate vibration in the direction parallel to the screen face can be achieved, the method is particularly suitable for selecting and grading of long-strip-shaped particles such as medlar, rice grains, melon seeds and long and short straw, and the problems that the error-sifting rate is high, and screening is difficult are solved.

Description

technical field [0001] The invention belongs to the field of screening machinery, and in particular relates to a screening device vibrating parallel to a sieve plate and a high-efficiency screening method, which is especially suitable for the selection and classification of elongated particles such as wolfberry, rice grains, melon seeds, and long and short straws. technical background [0002] Screening machinery is widely used in coal, metallurgy, mining, chemical, food and other industries. The current screening equipment mainly includes fixed screens, drum screens, vibrating screens, and shaking screens. Different materials adopt different screening methods according to their shapes and characteristics. Long-strip granular materials have poor rolling characteristics and fluidity, so fixed sieves without power sources are generally not used; while drum sieves are operated when the materials are turned over in the drum, many long-strip granular materials will pass through t...

AI Technical Summary

Problems solved by technology

[0004] To sum up, the existing shaker and vibrating screen are difficult to meet the requirements of efficient screening and accurate screening of elongated granular materials

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