SU1371718A1 - String sieve - Google Patents

Abstract

The invention relates to a device for separating materials by size and Mob. used in the coal, ore, and other areas of promet. The purpose of the invention is to increase the efficiency of sieving due to additional oscillations of the screening surface. The sieve consists of a frame 1, a screening surface in the form of strings (C) 2, a tension device 3, transverse combs 4 and 5, devices for fastening C 2 in the form of rollers 6 mounted on cross-beams 7 and 8. On C 2, weights are fixed (D) 9, made in the form of cylinders with cuts. The ends of G 9 are in the shape of truncated cones. With this, G 9 is set to the width of the sieve through one C 2. When mounted on the screen, frame 1 transmits C 2 oscillations. At the same time, the adjacent C 2 has a different amplitude of oscillation due to G 9. The blow to the moving stream of the blasted material, G 9 mix it, which contributes to the effective screening of small fractions from the wetted material. 1 hp f-ly, 4 ill. from 9 (L

Description

00

CX)

113

The invention relates to devices for the separation of materials by size and can be used in the coal, ore industries and other sectors of the national economy.

The purpose of the invention is to increase the effi- ciency of sieving due to additional vibrations of the screening surface.

Figure 1 shows a side view of a string screen; figure 2 is the same, the view in the plan; on fig.Z - part of the screening surface, isometric; figure 4 - section aa in figure 1.

The string sieve consists of a frame 1, a screening surface in the form of a jet 2, a tension device 3, transverse combs 4 and S, devices for fastening the strings in the form of rollers 6 mounted on cross-bars 7 and 8. On the strings 2 are fixed loads 9, made in as cylinders with a slit 10, the ends of the weights 9 are in the shape of truncated cones 1i.

I

Originally wound the strings 2 with

a slight slight tension around the pinch rollers 6 and then tighten them. After the chug; 1 st device 3, the final tension of the strings is performed, then weights 9 are set through one string across the width of the sieve. Cargoes are initially i-shaped. After installing them on the strings compressed to a cylindrical shape.

The string screen works as follows

When mounted on the screen, frame 1 oscillates, which transmits vibrations to strings 2. Since half of the strings are supplied with loop 9, they have a greater mass than adjacent strings without weights, and consequently, a large additional amplitude. Consequently, the weights hit the moving stream of rattling material.

and stirred it, which contributes

Yu

five

0 5

0 5

0

five

0

182

effective screening of small fractions from the wetted material.

If the string sieve is installed without a vibrator stationary in the hopper flow before the crusher at an angle of 50-70 °, then moving pieces of material hit the tapered surface of the weights, which deviate in the direction opposite to the deviation of the struck piece and cause the string to oscillate.

Thus, the strings in the stationary sieve oscillate and contribute to the mixing of the material and the effective screening of small fractions from the cargo flow of high humidity and with clay inclusions.

The arrangement of the strings through one with the weights and the alternating tension of the strings on the combs with variable groove depths (not shown in the description) create a wavy screening surface with impacting loads on the moving traffic. Such vibration of the strings in the process of screening leads to their self-cleaning and separation of sticky material, an increase in the efficiency of sieving due to additional oscillations of the screening surface.

Claims (2)

1. A string sieve comprising a frame with a screening surface in the form of strings, a tension device and a device for fastening strings, characterized in that. what, in order to increase the sifting efficiency due to additional oscillations of the screening surface, the strings are provided with weights made in the form of split cylinders with bevels at the ends, and the weights are set across the width of the sieve through one string. 2. Sieve on Po1, characterized in that the bevels at the ends of the goods are made in the shape of a truncated cone. figure 1 CPU g / g