DE8712708U1 - System sieve bottom with a variety of interchangeable sieve elements - Google Patents

Description

PATENT ATTORNEYS? ^a lot of stress

DIPL-ING. BODO TMIELKING °° ^EEFE

DIPL- .NG OTTO ELBERTZMAGEN

POSTAL CHECK ACCOUNT: HAN 309193-302

änwautsäkt13 4 §/Sg"
DAfUfP «09.1987

Applicant: Steinhaus GmbH I

Plane Tree Avenue 46 §

4330 Mülheim (Ruhr) 1 I

Designation: System sieve bottom with a variety of

replaceable^ sieve elements f

The innovation refers to a system sieve tray with y

a variety of interchangeable sieve elements, each

a sieve surface with sieve openings of square-!>

ical or rectangular basic shape and which are

opposite edges, as on their longitudinal edges, ' ;

are detachably supported on intermediate strips which can be fastened to ^ a supporting structure.

A system sieve bottom of the aforementioned type is from the &iacgr;

DE-Al 33 07 916 known» The connection of the sieve- J

surface forming screen grid or perforated plate with the 1

Intermediate strips are made there by means of the top I

the screen surface from attachable locking profiles, between f

between which and the intermediate strips the sieve grids or perforated plates are clamped. This eliminates two essential
Disadvantages. Because the locking profiles are
over the top of the sieve, where it is in the
conveying direction of the screening machine. This creates so-called screening lines, which

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Because there are gaps between the locking profiles which the material to be screened cannot cross as long as the layer thickness on the top of the screen surface does not exceed the height of the locking profiles protruding upwards. This prevents the entire width of the system screen base from being used, especially when the material to be screened is fed in zones.

The innovation is therefore based on the task of creating a sieve bottom of the generic type in which the material to be sieved can be distributed unhindered over the entire upper side of the sieve surface, even when fed in zones.

According to the innovation, this task is solved in a generic system sieve base in that the sieve elements are directly connected to one another with the top sides of their sieve surfaces to form a continuous overall sieve surface and have protruding locking bodies on the underside at the support points of their fastening edges, whereby the intermediate strips have corresponding locking openings on their top sides.

The particular advantage of a system sieve bottom according to the innovation is that even simply constructed sieve grids or perforated sheets as the active sieving components of the sieve elements are attached to the intermediate strips in such a way that the sill-like projections that prevent the sieving material from passing through the continuous sieve surface are avoided. Due to the snap-in connection, the sieve elements can easily be snapped onto the intermediate strips or removed from there again, which makes it easy to replace all

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&iacgr;ich or individual sieve elements is ensured*

The locking bodies are advantageously formed on edge strips which are formed on the underside of the fastening edges of the slot elements or are firmly attached to them. In the case of a welded slotted screen which consists of cross bars arranged at a distance from one another on the underside and of longitudinal bars welded onto them, the latter enclosing slot-shaped screen openings between them, the edge strips with the locking bodies are arranged between the cross bars. As a result, the top of the screen surface is also formed by the longitudinal bars in the area of the support edges, the top sides of which are flush with the top sides of neighboring screen elements without intermediate elevations.

The intermediate strips can be connected to a substructure using suitable fastening means, which can be formed by a removable frame or by the support struts of a screening machine. In a preferred design, the intermediate strips have snap or expansion anchors on the underside, which engage in corresponding locking openings in the support profiles, whereby the snap effect is ensured by the fine rubber-elastic material of the intermediate strips. To ensure that the intermediate strips cannot permanently deform in the area of the upper locking openings for the locking bodies of the screening elements, reinforcement is embedded in the material of the intermediate strips below these locking openings.

Further advantageous design features of the innovation emerge from the subclaims and from the following description.

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The innovation is explained in more detail below using the drawing as an example of implementation. The drawing shows a section of a cross-section through a system sieve base in the support area of two interlocking sieve elements.

In detail, the drawing shows two sieve elements 1 of a welded slotted sieve, in which longitudinal bars 2 are welded onto cross bars 3 on the underside. Between the longitudinal bars 2 there are slotted openings of any width for the passage of the sieved material / which cannot be seen in more detail in the drawing. The cross bars 3 on the underside of the friction elements 1 are arranged at much greater distances from one another than the longitudinal bars 2 on the top, and edge strips 4 are inserted between the cross bars 3 on the undersides of the longitudinal edges of the sieve elements 1. The edge strips 4 essentially have a T-shaped cross-sectional profile, with the upper, roof-shaped T-flange having the same thickness as the quartz bars 3 of the sieve elements 1. On the top side of the upper T-flange, the longitudinal bars 2 extend to the edge of the respective sieve element 1, so that their top sides are flush with the top sides of the longitudinal bars 2 of the adjacent sieve element 1 without any disturbing elevations in between.

On the undersides of the edge strips 4, the central T-flange is formed by a protruding rib 6 with an edge bead 7, which results in an overall locking body 5.

The adjacent sieve elements 1 engage with the locking bodies 5 of their mirror-image

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Edge strips 4 each fit into a locking opening 8 of an intermediate strip 9, which is made of a sufficiently elastic material, such as polyurethane. The intermediate strip 9 is in turn locked to a support profile 12 via snap anchors Io on the underside, which has corresponding locking holes 11 for this purpose. The support profile 12 can be an integrated component of a screening machine or an interchangeable frame for a screening machine. So that the intermediate strip 9 has sufficient dimensional stability in the area of the locking openings 8 despite the elastic material, a reinforcement 13, for example in the form of a steel mesh, is embedded in the material of the intermediate strip 9 below these openings 8.

Claims (5)

1. System sieve base with a large number of replaceable sieve elements, each of which has a sieve surface with sieve openings of square or rectangular basic shape and which are detachably supported on intermediate strips on opposite edges, as well as on their longitudinal edges, which can be attached to a supporting structure, characterized, that the sieve elements (1) are directly connected to one another with the upper sides of their sieve surfaces to form a continuous overall sieve surface and have protruding locking bodies (5) on the underside at the support points of their fastening edges, whereby the intermediate strips (9) have corresponding locking openings (8) on their upper sides. 2. System sieve bottom according to claim 1,
characterized, that the sieve elements (1) have edge strips (4) formed or firmly attached to their fastening edges on the underside, on which the locking bodies (5) are arranged as protruding ribs (6) with thickened edge beads (7). 3. System sieve bottom according to claim 2,
characterized/ ■ t > I I- · S · - 2 - 3349 that the edge strips (4) on the sieve elements (1) have an approximately T-shaped cross-sectional profile. 4. System sieve bottom according to claim 2 or 3,
characterized, that the sieve surfaces of the sieve elements (1) consist of longitudinal bars (2) welded onto cross bars (3) arranged at a distance from one another, with the edge strips (4) being arranged between the cross bars (3). 5. System sieve bottom according to one of claims 1-4,
characterized, that the intermediate strips (9) consist of a rubber-elastic material with snap and expansion anchors (10) molded onto the underside and have an embedded reinforcement (13) below the locking openings (8). b. System sieve bottom according to one of claims 1-5,
characterized, that the intermediate strips (9) each have two locking openings (8) mirror-symmetrically to the longitudinal center of their upper sides, into which the locking bodies (5) of two adjacent sieve elements (1) can be snapped. S ·