SU906627A1 - Drum tyre screen - Google Patents

Description

(54) DRUM DIE

one

The invention relates to devices for the separation of multicomponent high-moisture granular materials into fractions and can be used in the municipal, chemical, metallurgical or other industries.

A drum screen is known in which nozzles for supplying compressed air are installed along the drum.

The disadvantage of this ycTpovicTBa is that it quickly becomes clogged and goes out of line.

Also known drum screen, comprising a sieve drum, enclosed in a casing, drive and cleaning device, made in the form of a brush 2.

However, when sifting wet materials with a complex fractional orological composition, for example, a compacted mass of solid household waste, 11 clogging of screen holes occurs, and the brush fails due to winding of long fiber and textile materials on it

The purpose of the invention is to increase productivity by preventing clogging of the drum holes.

The goal is achieved by the fact that the screen is equipped with an additional cleaning device made in the form of knives

10 the perimeter of the cross section of the drum and nozzles, the knives have spring-hydraulic shock absorbers and rollers in contact with the drum surface, and the nozzles are located between the blades and rollers coaxially with the drum holes, while the brushes are installed along the drum and have spring-loaded combs.

FIG. 1 image ken drum

20 crash, longitudinal section; 2 in FIG. 2, a cross-section.

The screen consists of a support frame 1, support rollers 2 mounted on the frame, drum 3 and drive k. The drum is installed with a horizon to the horizon. To eliminate axial movement of the drum, the stop rollers 5 serve. The screen is equipped with loading 6 and discharge 7 trays, feeding 8 and discharging 9 and 10 conveyors. Screw blades 11 are provided in the drum loading area. An additional cleaning device is made in a series of rows of knives 12 and nozzles connected by nozzle headers 13 that are located along the perimeter of the drum cross section. The screen is also equipped with rotating brushes 1, drive 15 and spring loaded 16b Nozzles coaxially the holes of the screening surface of the Knives are equipped with rollers 17 and spring-hydraulic shock absorbers, consisting of shock absorbers 18 and levers 19 providing swing knives in two mutually perpendicular planes. The nozzle headers are connected by flexible inlet pipes 20 to a common discharge pipe 21 to prevent dusting and reduce noise, the drum is covered by a casing 22 equipped with exhaust ventilation. The screen operates as follows. The source material is transported by the conveyor 8 into the loading tray 6, and from there into the rotating drum 3. The helical blades 11 capture the material and distribute it evenly over the screening surface of the drum. Moving through the sieve, the fine fractions fall through the openings of the screening surface into the discharge tray 7 and enter the discharge conveyor 9 Large fractions are withdrawn by the conveyor 10. The long fibrous materials stuck in the openings of the sieve are cut off by means of 12, which are used to increase the effects : The capacities are self-aligning with respect to the screening surface of the drum with a constant gap. For this they are supplied with contact

torsion rollers 17 with a screening surface, shock absorbers 18, and have the possibility of limited movements in two mutually perpendicular planes on the levers 19.

Research institutes in the openings of the screening surface of non-cutting materials, such as metal fragments, knives

Claims (2)

knives, located around the perimeter of the cross section of the drum and nozzles, the knives have spring-hydraulic shock-absorbing drum rollers, and the nozzles are located between the knives and rollers coaxially with the holes of the drum, while brushing out due to the excess cutting forces clamping rollers to the drum, which can be adjusted. The smoothness of knives tilting and unaccented return feed is ensured by using spring-hydraulic dampers, jams. The remaining long-fibrous, as well as sticky and damp materials are left in the holes of the screening surface of the drum, as well as using rotating brushes H, and In order to increase the efficiency of air cleaning, nozzle headers 13 are placed between the blades 12 and the rollers 17 in the immediate vicinity of the screening surface and are moved together with the knives relative to the drum, aka arrangement reduces the air flow and prevent sticking of the material on the knives and rollers. In order to prevent the long-fiber materials from winding on the rotating brushes, the latter are equipped with cleaning elements 16 made in the form of spring-loaded combs. Purging the sieve with an air stream provides simultaneously with the cleaning of the holes, the drying of the screening surface and the cleaning tools, which reduces the possibility of sticking of the whitefish and increases the performance of the screen as a whole. Claims: A drum screen comprising a screen drum enclosed in a casing, an actuator and a cleaning device made in the form of a brush, characterized in that, in order to improve performance by preventing the drum holes from clogging, the screen is equipped with an additional cleaning device that makes contact with the surface 5 ki. installed along the drum and have spring-loaded combs. Sources of information taken into account in the examination of 906627 1. Authors certificate of the USSR t W 278396, class, B 07 B 1/22, 1968. 2. USSR Author's Certificate No. itl9266, cl. В-07 В 1/22, 1972 (prototype).