CS227232B1 - Disc sorter wiper - Google Patents

Abstract

The object of the invention is to provide a wiper for a disk screener for bulk materials containing water or other impurities that cause the bulk materials to stick to parts of the disk screener, which has minimal friction surfaces between the side walls of the wiper fingers and the side walls of the screener disk. For this purpose, the wiper fingers (3) have a trapezoidal cross-section along their entire length, the longer side of which forms the leading edge of the scraped material from the shaft (4) of the screener disks (5).

Description

(54)

Disc separator wiper

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wiper of a disc sorter of loose materials containing water or other impurities that cause loose materials to adhere to a portion of the disc sorter having minimal friction surfaces between the side walls of the wiper fingers and the sides of the screen. For this purpose, the wiper fingers (3) have a trapezoidal cross section over their entire length, the longer side of which forms the leading edge of the stripped material from the shaft (4) of the screening disc (5).

Giant. 1

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BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary disc screen wiper for granulometric screening of bulk materials containing water or other impurities causing the screened material to adhere to a portion of the disc screen.

The rotating disc sorter consists essentially of a series of rotating shafts with mutually parallel axes, provided with discs of different shapes, mounted on the shafts at certain distances relative to each other, to determine the upper limit of the so-called subnet fraction falling through the sorter. The disks are situated on the shafts such that in plan view they are in alignment with each other in the longitudinal and transverse directions with respect to the axes of the shafts or are offset from one another. The shafts are driven either by a central drive or individual drives. These screeners are preferably used for granulometric screening of bulk materials with water or other impurities, causing the screened material to stick to parts of the disk screen. For poorly sticky bulk materials, it is sufficient to prevent their sticking from the main functional elements, i.e. the rotating discs, the centrifugal force exerted by the rotation of the discs.

For more sticky loose materials, the sorter must already be equipped with wipers, situated mostly vertically below the longitudinal axis of the disc shafts. The wipers are in the form of fingers of rectangular or square cross section extending into the disc gaps, with the rotation of the disc shafts wiping sorted bulk material stuck or stuck in the gaps between the discs. The main functional sink openings are safely cleaned even when sorting loose materials with an increased tendency to stick these openings.

One of the main factors determining the intensity and efficiency of this cleaning of the gap between discs is the distance of the side surfaces of the wiper fingers from the sides of the discs. With small gaps between the side surfaces of the wiper fingers and the sides of the discs, the gaps between the discs are well cleaned. The disadvantage here is the increased friction which, due to the large number of gaps in one shaft, which increases towards the lower required separation limits and thus narrower gaps, affects the sorting performance or results in increased power consumption of the screen and increased wear of the wipers. disks. With large gaps between the side surfaces of the wiper fingers and the sides of the discs, friction is reduced, but the accompanying disadvantage is that the gap between discs not treated with bulk material on the disc sides is reduced and thus the sharpness and sorting efficiency are reduced.

These disadvantages of existing disc wipers are eliminated by a disc sorter consisting of holders and fingers, wherein the individual fingers are located in the gaps between the individual discs mounted on the shaft according to the invention, characterized in that at least part of the length of each finger has a trapezoidal cross-section. the other side of which forms the leading edge of the scraped material from the separator shaft.

An advantage of the disc sorter wiper according to the invention is that the friction surface between the sides of the wiper fingers and the side surfaces of the discs is minimized. This significantly reduces friction and thus reduces the power consumption of the sorter and increases the life of the discs.

The disc wiper of the present invention is shown by way of example in the accompanying drawing, wherein FIG. 1 is a side view of the wiper and the disc sorter; and FIG. 2 is a plan view of FIG. 1.

According to an exemplary embodiment, the wiper of the disc sorter according to the invention consists of holders 1 mounted on a common support shaft 2, to which the fingers 2, whose cross-sections have the shape of a regular trapezoid, are attached. The longer side of each regular trapezoid forms the leading edge of the scraped material from the separator discs 6 and the longitudinal edges of the fingers 1, the leading edge of the scraped material from the side walls of the separator discs between which the fingers 1 are disposed.

Claims (1)

SUBJECT OF THE INVENTION A disc classifier wiper consisting of holders and fingers, wherein the individual fingers are located in the gaps between the disks mounted on the shaft, characterized in that at least part of the length of each finger (3) has a trapezoidal cross-section whose longer side forms the leading edge of the shaft material (4) discs (5) screeners.