SU1440563A1 - Disk grain grader - Google Patents

Abstract

The invention relates to the separation of bulk mixes according to grain size and can be applied in mining, the construction industry and agriculture. The purpose of the invention is to increase the productivity and efficiency of the separation due to the selective separation of segregated grains. In case 1 on the horizontal. the shaft 2 is fixed with disks (D) 3. The latter have a cellular side surface on which concentric rows of cells are made with dimensions decreasing from the center of D 3 to the periphery. In the upper part of the housing 1 there is a loading opening 4, in the lower part - discharge pipes 5,6 to remove, respectively, short and long grains. Under the influence of rotating D 3, the initial mass acquires the property of fluidity and is divided by size. In its lower layers small short particles are grouped, in the upper ones - large long particles. Particles perform a relative slip along the cell surface of D 3. Each cell captures one short grain, which d drops out into the nozzle 5 with a corresponding S rotation of the DZ. When moving from the opening 4 to the nozzle 6, the mixture is freed from short grains and discharged into the nozzle 6. 3 sludge. And cl

Description

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The invention relates to the separation of bulk mixes according to grain size and can be applied in mining, the construction industry and in agriculture.

The purpose of the invention is to increase the productivity and efficiency of the separation through the selective separation of segregated grains.

FIG. 1 shows a device, a longitudinal section; in fig. 2 is a section A-A in FIG. 1, in FIG. 3 — node 1 in FIG. 2

The device consists of a housing 1, in which disks 3 are fixed on a horizontal shaft 2. In the upper part of the housing 1 there is a loading opening 4, in the lower part there are discharge pipes for removing short grains 5 and long grains 6. The disks have a cellular side surface 7 limited by internal radius Rm / n and outer radius Rmax, nn which made cells 8-10, having different sizes. The cells are arranged in concentric rows and their size decreases from the center of the disk 3 to the periphery.

Trier works as follows.

The initial grain mixture, consisting of particles differing in length, continuously and evenly enters the body 1 through the loading opening 4. The Trier drive (conventionally not shown) informs the shaft 2 of the cellular disks 3 with a uniform rotational movement in the direction of the arrow n (Fig. 2) . Under the influence of rotating disks of a grain, the mass acquires the property of fluidity, i.e. liquefies, resulting in its segregation (separation by size). In its lower layers mainly small, short particles are grouped, and in the upper layers - large long particles. Particles with intermediate properties occupy an intermediate position. Particles,

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having made relative slip along the lateral surface 7 of the rotating disks 3, they come into contact with the cells 8.9 and 10, the geometrical parameters of which are chosen taking into account the sizes of the grain material being sorted. Each cell picks up no more than one short grain, which then falls into the collecting and removing nipple 5 at the corresponding angle of rotation of the disks 3. Moving along the trier in the direction from the feeder 4 to the nipple 6, the grain mixture is gradually released from the short particles and the moment of reaching the outlet of the nozzle b practically contains only long particles. Since the Trier works continuously, then at steady state operation, the dynamic grain layer acquires characteristic outlines (section A-A in Fig. 1).

The use of cellular disks with different cell sizes allows an increase in the number of cells in comparison with the known devices, and the selective removal of stratified grains increases the separation efficiency of bulk mixtures.

Claims (1)

Invention Formula Trier disc, comprising a housing, a horizontal shaft located inside the housing, with disks mounted on it with lateral sides, a loading device, removal pipes for separation products, and a drive characterized in that, in order to increase separation efficiency and efficiency, due to selective separation of segregated grains The cells are made with a variable cross section, while the cell sizes are reduced from the center to the periphery of the disks. Fa.H.