DE8435585U1 - DEVICE FOR SCREENING SEVERY DIFFERENT GOODS - Google Patents

Description

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COHATJSZ & FLORACK

PATBNTAN WALTSBÜRO SCHUMANNSTR. 97 D-4000 DÜSSELDORF 1

Telephone: (0211) 6B3346 Telex: 08586513 copd

PATENT LAWYERS:
DipL-lng. W. COHAUSZ DipWng. R. KNAUF Dipl-Ing. HB COHAUSZ · DipL-lng. D. H WERNER

11/19/84 - 2 -

Hein, Lehmann AG
Fichtenstrasse 75

4000 Düsseldorf 1
5

Device for sieving difficult-to-screen material

The invention relates to a device for sieving screen difficult to screen goods with a flexible, sohwingungs he excited, screen openings having work mat; and with a flexible second mat attached immediately below the work mat, which is a different Has vibration behavior compared to the working screen mat.

20th

With fine separations in the millimeter range, very moist and sticky bulk materials are sifted dry Anbackuivgen on the screen mats of the flip-flop machines, which open the screen, especially in the area greatly reduce the size of the terminal strips. This leads to ü.iner Reduction of the performance with a simultaneous reduction of the cut size. Both phenomena are undesirable. Performance and cut size should remain constant over a wide range of humidity, if possible.

30th

G04 / 51O
HC / Be

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With the previously known SpannweÜ screening machines, we encountered ^:

one increasing difficulty in screening, among other things, with increasing pre-tensioning of the screen mats. This approach

are, however, due to the decreasing stroke and the necessary-;

in the elastic range of the material used:

There are limits to staying with the screen mat. It is then .!'

necessary, the screen mats by constant knocking [

to keep them free from caking. _:;

With some fluted screen machine types, however, this can be ^

f not in the known way by means of rubber balls, for example

happen because the screening machines do not perform a stroke, but- [

dern only linearly offset from one another by 180 ° |

swing. Rubber balls or similar tapping elements would |

do not hit the sieve surface, but practical |

only fly back and forth parallel to the sieve surface. I.

From DE-OS 30 13 737 it is known, among other things, \

add a flexible second mat below the work mat

secure that a different Schwingungsverhai-)

ten compared to the working screen mat and thereby ■

reduces the risk of clogging and sticking. j.

The object of the invention is to improve a device of the type mentioned in such a way that with larger Effect caking and clogging of the sieving work mat is prevented.

This object is achieved according to the invention in that |

for hitting the underside of the work mat the lower second mat tapping elements are attached. |

The knocking | knocking from below against the work mat

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elements prevent one with a much greater effect Baking and clogging of the work mat. This is in the case of difficult-to-screen, moist and sticky bulk goods particular advantage.

It is preferably proposed that the knocking elements are attached in the area of the webs of the work mat, so that the knocking elements only against the webs of the work mat beat and are particularly effective with little wear.

It is advantageous if the knocking elements are exchangeable, Are rod-shaped and attached transversely to the direction of movement of the screenings. Also, the second mat should be releasably attached be.

An embodiment of the invention is shown in the drawing in a vertical section along the movement of the Material to be screened is shown and is described in more detail below. Show it:

Fig. 1 shows a section through three cross members lying next to one another with mats stretched in the left field and in the right field relaxed mats and 25

Fig. 2 is a section through two cross members with a tensioned upper working screen mat and below in Distance between the second mat due to its swinging-out. 30th

The expansion shaft screening machine has cross members 1, 2 made of hollow profiles, the cross member 1 being a first Frame system and the cross member 2 a second frame

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belong to the system. The cross members 1, 2 lead to each other coordinated oscillating movements in the horizontal direction, i.e. linearly offset from one another.

On the cross members 1, 2 are rectangular, strip-shaped Working sieve mats 3 clamped along their opposite longitudinal edges, with the one longitudinal edge on one Cross member 1 of the first frame system and the other longitudinal edge attached to the cross member 2 of the second frame system is. The side edges of the same working screen mat are thus assigned to different frame systems. the Working screen mats 3 consist of a perforated plate made of flexible material such as rubber or plastic.

Immediately below the working screen mats 3 is each a lower second flexible mat 4 clamped along its opposite longitudinal edges, in turn the one longitudinal edge on the cross member 1 of the first frame system and the other longitudinal edge on the cross member 2 of the second Frame system is attached. The edges of both mats 3, 4 are clamped between a lower cross bar 5 and an upper transverse strip 6, which are each screwed to the cross members 1, 2 on their upper sides. The lower second mat is also made of rubber or plastic.

The lower, second mat 4 has larger openings in terms of area 7 than the sieve openings 8 of the work mat. Furthermore, the lower mat has a lower pretension on than that of the upper one, so that when the cross members swing to one another in the sieve level, the lower mat Swings differently from the upper one and thus hits the upper one from below.

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On the top of the lower work mat 4 rod-shaped or strip-shaped knocking elements are horizontal and transverse to Direction of movement of the screened material attached, which are made in particular of steel and are interchangeable. This Klopfele ^ elements 9 are attached in the area or at the level of the webs 10 located between the sieve openings of the work slat, so that the knocking elements from below against the webs Beat 10. The knocking elements 9 consist of on the with the second lower mat 4 firmly connected KieSim elements, Consists of plastic and the easily exchangeable shaped rods made of steel.

In Figure 2, the position of the working screen mat 3 is shown so that they are the at this moment of the movement has reached the stretched state. While the working screen mat is stretching from this moment on, it beats the lower second mat 4 tapping elements against the working screen mat 3.

20th

Claims (4)

III ι · ■ ■ · ■ · «Til · ■ ■ · * ■ · ³ '■ *> S ■ · * 4 · I ι Ul IHI 1β COHAUSZ & FLORACK patbntanwaltsbOro
schumannstr. 97 d-4000 düsseldorf 1 Telephone: (0211) 6B3346 Telex: 08586513copd PATENT LAWYERS: DipWng. W. COHAUSZ DipHng. R. KNAUF · DipL-lng. H. B. COHAUSZ · Dipl-lng. D. H. WERNER 11/19/84 Expectations () 1. Device for sieving difficult sieves goods with a flexible, vibration-excited, sieve opener, exhibiting work mat and with a flexible second mat attached directly under the work mat, which has a different vibration behavior compared to the work sieve mat, characterized in that for bin hitting against the underside of the work mat (3) on the lower second mat (4) knocking elements (9) are attached. 2. Apparatus according to claim 1, characterized that the knocking elements (9) fastened in the region of the webs (10) of the work mat (3) are. 3. Apparatus according to claim 1 or 2, characterized in that the knocking elements (9) removable, rod-shaped and transverse to the direction of movement of the material to be screened are attached. 4. Device according to one of claims 1 to 3, characterized in that the second mat (4) is releasably attached. : 30 ^; G84 / 51O HC / Be