SU1680367A1 - Sieving device - Google Patents

Description

The invention relates to equipment for sorting chopped wood and m. B. used in wood processing enterprises. The purpose of the invention to improve the quality of waste sorting chips. In the case (K) of the device installed with the possibility of circular oscillations, inclined sieves are arranged in tiers with alternating perforated sections (PU) 6 and non-perforated sections (WELL) 7. At the same time, WELL 7 on the underlying screens are located under PU 6 on the overlying screens and vice versa. In addition, PU 6 are alternated with OU 7 across the width of each sieve with the formation of chess squares over the entire surface of the sieves. The installation pitch of the chess squares is determined by the formula ΐ aK / cos a, where a is the amplitude of the circular, oscillations of the K device; and - the tilt angle of sieves; K = 0.8-1 - coefficients. proportionality. Due to the circular oscillations of K1, the sorted raw material moves on each sieve along a spiral path. Such a trajectory in combination with the staggered arrangement of PU 6 and NU 7 provides an effective release of the sieves from the fines fraction and the promotion of long particles through the sieves without sieving. 3 il.

The invention relates to equipment for sorting chopped wood and can be used in wood processing enterprises.

The purpose of the invention is to improve the quality of waste sorting chips.

FIG. 1 shows a device for separating waste sorting chips, general view; in fig. 2 is a view A of FIG. 1 (one of the tiers of screens with the location of perforated and non-perforated sections); in fig. 3 - the trajectory of movement of particles of the sorted raw materials on the sieve in the process of separation.

The device includes a case 1 installed with circular oscillation, a feed 2 and a discharge 3 trays, a receiver of the fine fraction 4, placed in the case 1 by tiers of sieves 5, mounted at an angle a to the horizon and having alternating between the perforated 6 and non-perforated 7 sections, the non-perforated portions 7 on the underlying sieves 5 are located under the perforated portions on the overlying sieves 5 and vice versa. The device has an eccentric drive shaft 8 for providing circular oscillations of the housing 1. 6 perforated sections are located with

1680367 A1

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alternating with non-perforated sections 7 across the width of each sieve 5 with the formation of chess squares over their entire surface, while the placement of chess squares is determined by the formula

x

"cos

where ΐ is the spacing of perforated areas, mm;

a is the amplitude of circular oscillations of the device case, mm;

a-tilt angle sieves;

K = 0,8-1 - proportionality coefficient (determined empirically).

A device for separating waste sorting chips is as follows.

Waste sorting chips for tray 2 enters the housing 1 on the upper tier. Due to the circular oscillations of the housing 1 with a set of sieves 5, obtained from the eccentric drive. the shaft 8, the sorted raw material moves on each sieve 5 in a spiral with a radius commensurate with the amplitude of the circular oscillations of the housing 1, i.e. the sorted raw material moves on each tier of sieves 5 along the spiral trajectory.

When moving the sorted raw materials through the perforated areas of 6 one-dimensional sieves 5, the fine fraction of the sorted raw materials is more likely sifted to the lower tier. Sifting of long particles of raw materials to the lower tier is less likely, since sifting of long particles through the cells of the perforated area can occur only if long particles of the raw material in the sorting process have a vertical or semi-vertical position. Long particles of raw materials with further movement, falling on the perforated section 7, lose the possible vertical or semi-vertical position, return to

horizontal position and further, getting back to the next perforated section 6, are less capable of sifting to a lower tier than the fine fraction, i.e. the spiral trajectory of movement of the particles of raw materials in combination with the staggered arrangement of the perforated sections 6 provide a high frequency of soothing long particles of raw materials, low probability of penetration of long particles on the lower tier with an effective release from the fine fraction and with the successful achievement of long particles of raw materials in the discharge tray 3 and minik large fraction.

Claims (2)

Claims of the Invention A screening device that includes a body mounted with the possibility of circular oscillations, inclined screens placed in a case in tiers with alternation of perforated and non-perforated sections and location of non-perforated sections on the underlying screens under the perforated sections on the overlying screens and vice versa, feeding and discharging trays, receiving chalks, and receiving chalks characterized in that, in order to improve the quality of separation of waste from the sorting of chips, the perforated areas are arranged in alternation with non-perforated portions across the width of each sieve with the formation of chess squares over the entire surface of the sieves, and the pitch of placing the chess squares is determined by the formula x from the lake where a is the amplitude of the circular oscillations of the device, mm • a-tilt angle sieve, hail; K = 0.8 - 1 - proportionality coefficient. 2 1680367