SU1360820A1 - Sieve for separating grain products - Google Patents

Abstract

The invention relates to a technique for the separation of bulk mixtures and m. used in the milling, feed and other industrial sectors. The purpose of the invention is to increase the production of water by increasing the throughput of the sieve (C). The pro-surface surface C is made in the form of alternating protrusions (B) 1 with openings 2 on their upper edges and depressions 3 with openings 2 on their bottom. to each other. The upper edges of the adjacent B 4.5 are located in the same vertical plane one way along the other. The minimum distance between the walls of adjacent B 4.5 and their minimum height is greater than the diameter of the holes 2; The size and shape of the holes 2 are selected from the process conditions. The material mixture is fed to C, making reciprocating oscillations in the direction of the trenches formed by the 3 channels. Passing particles that did not fall directly into the holes 2, fly into them after one or several collisions with the surface B 1, are sieved and removed into the passage fraction. Large and part of m (soft particles, bred from the surface B 1 to the depressions 3, are transported along the bottom of the depressions 3 to the edge C and removed to the tailing fraction. 1 Cp f-crystals, 1 dl., S СХ oh 00 oh

Description

one

The image is intended for the separation by size of bulk mixtures, mainly grain products, and can be used in the milling, animal feed and other industries.

The aim of the invention is to increase productivity by

136

increase its capacity. 10 hollows, or circular transducers. The drawing shows the screening surface of the sieve.

The sieve includes a sweeping surface, made in the form of alternating protrusions 1 with holes 2 and cavities 3 with holes 2 on the bottom of the depression, evenly spaced on the sieve with a step t determined by the condition

d + where d

2S + X t. b.

- the largest hole size

sieve, mm;

S - tol Djpnna screen sieve, .mm; b is the longest rebound length of the particles of the mixture to be separated from the sieve surface, mm; X - the largest particle size

mixes, mm

The upper faces of the protrusions 1 are inclined relative to the plane of the valleys 3 and are made with holes 2, and the upper edges of the adjacent protrusions 4 and 5

located in the same vertical area of the average smaller length of the rebound, one below the other. The minimum distance between the walls of adjacent protrusions and their minimum height with larger than the diameter of the openings when moving over the surface of the protrusions 1 to the valleys 3, they experience several impacts, as a result most of them fall into the screening surface. The lateral interstates of version 2 are sifted out and the forged faces of the protrusions are inclined in the passage fraction, at an acute angle to each other.

The size and shape of the sieve holes are chosen by their technological considerations Large particles: and some of the small particles bred from the surface of the projections 1 into the hollows 3, as a result. For example, the holes can have 45 slopes down the bottom of the hollows and their

round, square, oblong shape.

The web thickness S is selected from the conditions for providing rigidity to the sieve, ease of fabrication of the sieve, etc. and is usually when grading grain products from 0.5 to 1.2 Mm.

The installation angle of the entire sieve is selected in the range of 0-30 ° from the conditions for preventing overflow of the depressions transported by particles into the tailing fraction.

Sieve works. following way.

202

The sieve is placed in a working position in which the same cross-sectional points of the sieve are arranged horizontally, and the edges of the troughs, their bottom are inclined to the horizon at an angle / i. Then, siting is reported to reciprocate oscillations in the direction of the channels formed

oscillations in the sieve plane. From above, the whole horizontal projection of the sieve is uniformly distributed across its area with a rarefied flow of a mixture of raw material beams. The mixture enters from the top only to the areas of the projections 1. Gravitational forces accelerate into the field when the flow-through particles that fall directly into the holes are fed.

0 2, are sieved into them at the feed rate and, the passage between the side edges of the adjacent protrusions, are output to the production fraction. All coarse-sized particles and passable particles, not directly into the sieve opening, hit the partitions between the openings and are reflected due to the inclination of the surface of the projections 1 in the direction of the entrance to the hollows 3,

0 located between the edges 4 and 5. Large particles with a large rebound length, fly into the depressions after the first impact with the surface of the projections 1. Small particles have

five

When moving over the surface of the protrusions 1 to the valleys 3, they experience several collisions, as a result most of them fall into the holes 2, sift. And are released into the pass-through fraction,

Large particles: and part of the small particles, bred from the surface of the protrusions 1 into the valleys 3, as a result of vibrations are transported along them to the edge of the sieve and discharged into the tailing fraction. In the process of transporting these particles through the cavities through the holes in the bottoms of the cavities, additional extraction of fine particles into the pass-through fraction can be carried out.

55

Claims (1)

1. A sieve for separating grain products, including a screening surface made in a series of protrusions and depressions having 31 the upper and lower edges and parallel located upper and lower edges, the last of which are made with an opening, so that, in order to increase the productivity of the sieve by increasing its throughput; the upper faces of the protrusions are inclined relative to the plane of the depressions and are made with holes, and the upper edges of the adjacent protrusions are located Editor I. Shulla Compiled by S. Shestakova Tehred M. Khodanich Proofreader L. Patay Order 6176/12 Circulation 539. Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow. Zh-35, Raushsk na6., .4 / 5 ....-.- - - - “and .-- -.1 --.-- - - Production and printing company, Uzhgorod, Projecto st., 4 360820 in one vertical plane one below the other, with the minimum distance between the walls of adjacent - protrusions and their minimum height larger than the diameter of the holes of the screening surface. 2, Sieve POP.1, which is 1Q e so that the side faces of the protrusion are inclined at an acute angle to each other.