SU492316A1 - Drum crash - Google Patents

Description

DRUMBACK

(54)

one

The invention relates to the field of screening and can be used in the mining, coal, construction and other industries.

A drum screen, including a rotating drum with a no-i screening surface, is known. formed by a set of parallel arranged and mounted by means of fasteners rings.

Disadvantage of the famous drum

The screen is contaminated with fine grains of the product.

The proposed screen is equipped with a frame, made in the form of a set of parallel semicircles, on which a vibrator is mounted.

The drawing is a diagram of the drum screen, with a side view.

It contains a drum 1 made of two bands 2 supported on supporting and driving rollers 3. The bandages are interconnected by longitudinal strips 4 on which rings 5i are attached. Under frame 6 is located a frame with half rings 7 placed in a plane

symmetry between the rings of the drum. The frame is installed on the elastic elements 8 and a vibrator 9 is mounted on it. Inside the drum, the fixed end of the loading chute, 10, is inserted into the lower end of the drum.

The rumble works as follows.

Using the drive rollers 3, the drum 1 is driven into rotation and includes a VIBRATION 9. Through the feed chute 10, the source material is fed into the drum. The grains, the size of which exceeds the size of the neckline between the rings by rings 5 and half rings 7, remain inside the drum, are transported to the discharge end of the drum, forming a nadreshet product. Grains whose size is smaller than the size of the gaps between the rings 5 and the half rings 7 fall through these gaps and form an understeer product. The grains above the sieve product are simultaneously in contact with both the rings 5 and the semirings 7. When the semirings 7 vibrate, oscillations are transmitted to about half of the total mass of the oversize material,

as the number of rings is almost equal to the number of half-rings. Due to vibrations, the national sieve product loosens better, smaller grains pass more easily between large rings between the rings 5 and half rings 7. In addition, small grains more quickly flow through the gaps between the rotating rings and vibrating half rings, because the vibration of the half rings eliminates the possibility of small grains getting stuck in the slit

The drum screen, the screening surface of which is made as a set of rings arranged in parallel and mounted by means of fasteners, is characterized in that, in order to reduce the clogging of the fine product with fine grains, it is equipped with a frame made in the vice set of parallel arranged semirings on which a vibrator is mounted.