SU1660764A1 - Classifier of bulk materials - Google Patents

Abstract

The invention relates to the separation of material by size, in particular to the structures of drum-type classifiers. The purpose of the invention is to reduce the metal content and labor intensity of making a classifier while maintaining a given performance. The classifier contains concentrically arranged screening surfaces (PP) 1 and 2, made of composite radial sections (RS), by means of spacers 5 connected to the shaft 4. At the same time, the PCs are installed with the possibility of their alternate opening in the upper position with subsequent RS and closing with lower in the previous position of the RS. The arc length of PP 1 and 2 is equal to (1.25-1.5) ϕR, where R is the radius of the corresponding PP1 or PP2. The PCs are fixed on the sleeves 6 with recesses in which the spring stops 8 are located, which are brought together with the shaft 4 by means of projections 9 made on the latter. When the shaft 4 is rotated, the protrusions 9 cause the PC to rotate. In the upper position, the center of gravity of the PC is displaced and they "fall" under the action of the force of gravity, turning on the sleeves 6 and taking place from the previous PC. A continuous surface is created in the screening area of the material. 1 hp f-ly, 2 ill.

Description

The invention relates to the field of separation of bulk material by size and can be used in the building materials industry, for example, to classify aggregates of concrete into fractions, as well as in the mining, metallurgical and other industries.

The aim of the invention is to reduce the metal intensity and labor intensity of making a classifier while maintaining the specified performance.

FIG. 1 shows a classifier, a longitudinal section; in fig. 2 shows section A-A in FIG. one.

The bulk materials classifier contains concentrically arranged inner and outer screening surfaces 1 and 2 of cylindrical type, made of composite radial sections, joined in places 3 and connected to shaft A by means of a spacer 5. Radial sections are installed with the possibility of alternately opening in the upper position of the radial sections with subsequent radial sections turning them in the direction of rotation of the shaft and closing them with the previous radial sections in the lower position E, wherein the bottom arc of sieving surfaces is (1.25-1.5) To (R - radius screening surface). To sort the claydite, three sections are installed with an arc length of the screening surface of 1.5 lN. The selection of the number of sections is made constructively. The spacers 5 of the radial sections are fixed on sleeves 6 made by tapers 7. To ensure opening and closing the section there are spring stops 8 located in the recesses 7 of the sleeves and connected to the shaft 4 by means of acute angles 9 on the last corner. in the direction of rotation of the shaft 4, it is placed along its radius, and the second, along an arc that is convex relative to the center of the shaft 4, connecting the top of the protrusion with the base of the subsequent protrusion.

The classifier is equipped with a drive 10, a loading chute 11 and bunkers 12, 13 and 14 of the finished product, respectively, fractions 0-5, 5-10 and 10-20 mm.

Classifier bulk materials as follows.

A mixture of claydite fractions is fed through the loading chute 11 into the internal sieving surface 2, which consists of three adjacent sections. When the rotation of the shaft 4 from the drive 10 protrusions

9, made on the shaft 4, interacting with its radial side with the 7 stops 8 extended from the recesses 7 of the sleeves b, are rotated around the central axis

the sections of the screening surfaces 1 and 2. They move to a position, for example, the uppermost one, in which the first ones move the center of gravity along the sections and they break away from the subsequent

sections, fall under the force of gravity, turning on the sleeves 6 and taking place next to the previous section, creating a continuous surface in the area of screening material. In this way

section, one lash first during the rotation,

after the fall takes the place of the last

section, advanced into place

section, which in turn became the first,

When the sections fall, their lugs 8 move away from the protrusions 9 of the shaft 4 interacting with them and, moving along the arcuate surface of the lugs and overcoming the force of the springs of the lugs 8, move in the recess 7.

After turning the surface sections 1

and 2 over 90 ° spring stops, re-extended from the recesses 7 of the sleeves 6, vtr t into engagement with the following in the direction of rotation of the protrusions 9 of the shaft 4, Next

the process is repeated. When the sections are moved before they fall, the expanded clay is classified into fractions. From the sections of the element 1 claydite fraction of 0-5 mm, which passed through holes with a diameter of 5 mm,

enters the bunker 12 of the finished product, expanded clay fraction 5-10 mm, passed through the holes with a diameter of 10 mm sections of element 2, enters the hopper 13 of the finished product, and expanded clay fraction 10-20 mm enters the hopper 14.

Claims (1)

Claim 1. Classifier of bulk materials, comprising a shaft, cylindrical type screening surfaces concentrically located relative to the shaft, made of composite radial sections connected to the shaft by means of spacers, and an actuator, characterized in that reduction of metal consumption and laboriousness of making a classifier while maintaining a given performance, the classifier is equipped with a device for alternately opening the upper position of the radial sections with subsequent radial sections, their rotation in the direction of rotation of the shaft and the closure with the previous radial sections in the lower position. at the same time the length of the arcs sifting 73 eleven