DE2813989A1 - SCREEN DEVICE FOR GRAINY GOODS WITH AN INTERMEDIATE DISPENSER - Google Patents

Description

HOFFMANN · EITIJE & PARTNER

PATENT LAWYERS

DR. ING. E. HOFFMANN (1930-1976). DIPL.-I NG. W.EITLE DR. RER. NAT. K. HOFFMANN. DIPL.-ING. W. LEH N

DIPL.-ING. K. FOCHSLE DR. RER. NAT. B. HANSEN ARABELLASTRASSE 4 (STERNHAUS) ■ D-8000 MD NCH EN 81 · TELEPHONE (089) 911087. TELEX 05-29619 (PATH E)

30 470 v / each

Glowne Biuro Studiow i Projektow Przerobki Wegla "Separator" Katowice (Poland)

Sieving device for granular material with an intermediate deck transfer

The invention relates to a screening device for screening granular material in the pre-classification process in order to separate the finest grain classes from the feed material.

Up to now, the screening of granular material has been carried out on single or multi-storey built-in vibration screen boxes Sieve bottom carried out (Stanislaw Blaschke: "Mechanical preparation", Wydawnictwo Slask, Katowice 1972),

Also known is a device for sieving granular material (PL-PA p-184416), the sieve arrangement of which consists of at least two

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consists of parallel sieve trays arranged one above the other, at least one gap is made in the upper floor over its entire width.

There are also known sieve devices in which the sieve trays are installed in one or more sieve boxes, each of which executes vibratory movements during operation Sieve boxes contain several floors arranged one above the other, whereby several goods to be sieved according to decreasing grain classes (DT-PS 1,184,610; US-PS 2,578,177 and 3,347,368).

With the sieve constructions described above, only a low sieve performance and yield is achieved. With the two Sieve wings existing sieve trays, the upper wing only fulfills the function of relieving the sieve tray during the Screening process.

In contrast, it is the object of the invention to create a screening device with a high screening capacity and yield.

This object is achieved by the screening device characterized in the patent claim.

The device according to the invention gives a considerable Enlargement of the entire working sieve area and the entire width of the grain layer, and causes a significant increase the screening performance and yield of multi-deck screens. through utilization both sieve blades of the upper sieve bottom and by a continuous separation of the sieve passage 'from the sieving process of the upper wing into a container.

The invention is to be explained in more detail below using an exemplary embodiment. In the accompanying drawing shows:

1: the longitudinal section of the screening device;

2: the top view of the sieve device; and

Fig. 3: the cross section of the sieve box with consideration

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the roof-shaped inclined slide.

In a sieve box 1, an upper sieve bottom 2 and a lower one are inclined to the horizontal and parallel to one another Sieve bottom 3 arranged, the width of the lower sieve bottom 3 is smaller than that of the upper sieve bottom 2. Both Sieve bottoms 2 and 3 are equipped with sieves with the same mesh size.

The upper sieve bottom 2, consisting of two sieve blades 4 and 5 lying in one plane, is provided with a transverse gap 6 provided, through which part of the pre-screened material is transferred to the lower sieve bottom 3. The transverse gap 6 is covered on both sides with tabs 7 to give the flow of grain the required width.

The sieve passage of the lower sieve wing 5 of the upper sieve bottom 2 passes over a roof-shaped inclined chute 8, which with its lower edges up to the outlet gaps 9 and 10 configured along the side walls of the sieve box 1, together with the sieve passage of the lower sieve bottom 3 to a container 11.

The roof-shaped inclined slide 8, which is opened by angle 14 limited support profiles rests, is attached to one of the lower sieve flat steel profiles 13 of the upper sieve bottom 2.

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Claims (1)

HOFFMAiSN · IQITLE & PARTNER PAT E N TAN WALTE DR. ING. E. HOFFMANN (1930-1975) DIPL.-ING. W.EITLE - DR. RER. NAT. K. HOFFMANN DIPU-ING. W. LEHN DIPL.-ING. K. FOCHSLE DR. RER. NAT. B. HANSEN ARABELLASTRASSE 4 (STAR HOUSE). D-8000 MO NCH EN 81 TELEPHONE (089) 911087 TELEX 05-29619 (PATHE) . 30 470 v / each Glowne Biuro Studiow i Projektow Przerobki Wegla "Separator" Katowice (Poland) Sieving device for granular material with an intermediate deck transfer Claim Screening device for granular material with an intermediate deck transfer consisting of a vibrating screen box, the has an upper and a lower sieve tray with the same mesh size, the upper sieve tray with a is provided over the entire width of the gap, characterized in that between the Sieve bottom (2 and 3), preferably below the lower one Sieve wing (5) of the upper sieve bottom (2) a roof-shaped inclined chute (8) is installed, which with its lower Edges up to the outlet gaps (9 and 10) along the side walls of the sieve box (1) is sufficient and the width of the lower sieve bottom (3) is smaller than that of the upper sieve bottom (2) 809842/0718