DE102009010684A1 - Sieve drum for use in sieving centrifuge, has sieving elements forming sieving surface, fixed on inner side of curved drum-segment box in form fit and detachable manner and covering inner side of segment-box - Google Patents

Abstract

The drum has a sieving elements (2) forming a sieving surface and fixed on an inner side of a curved drum-segment box (1) in a form fit and detachable manner. The elements cover the inner side of the segment-box. The sieving elements are made of metal, plastic and ceramics. The box has a recess i.e. rear sectioned groove (7), on the inner side on the outer edges, which are provided parallel to each other and lie opposite to each other. A longitudinal edge of the sieving elements lie in the grooves in a form fit manner. The sieving elements comprise slot-, hole- or wire sieve.

Description

The The invention relates to a sieve drum, in particular a sieve centrifuge with the screen surface forming Sieve elements, each attached to the inside of arched drum segment boxes are.

It It is known to the screen drum of a centrifuge with curved segment boxes too provided, which are screwed to the screen drum and on their Inside carry strainer elements. It is known, the sieve elements on the inside of the frame-shaped To weld segment box. This leads in particular when replacing the sieve elements to a considerable amount of work. Further does that welding to a measure and shape change of the segment box and thus to warping.

task The invention is a screen drum of the type mentioned To improve so that the sieve elements simple and easy to assemble and dismantle and thus are easy to replace.

These Task is inventively characterized solved, that the sieve elements on the segment boxes form fit and solvable are attached.

By the form-fitting Fixing is a welding the sieve elements on the segment boxes not necessary, so it also does not warp the Segment box can come. Assembly, disassembly and replacement of the Screen elements are thus particularly easy and simple.

Preferably It is proposed that at each segment box only one Sieve element is attached, which is the inside of the segment box in the Essentially covered. Alternatively, it is proposed that at each segment box two or more sieve elements are fastened, which together the inside essentially cover the segment box.

One particularly secure hold with simple production is achieved when the segment box on its inside face each other, mutually parallel outer edges each a recess has in particular an undercut groove, in each case a longitudinal edge the Siebelementes form-fitting rests. It is also particularly advantageous if the segment box on its inside on opposite, parallel to each other Outer margins respectively has a plurality of recesses in which at the edge of the sieve element located protrusions einliegen. Here you can the projections be formed of the ends of the cross bars, which on the back the sieve surface are attached.

One particularly safe and easy grip is given when the sieve elements with their two opposite edges releasably secured to the straight or curved outer edges of the segment box are. Also, this is advantageous if the sieve elements in the in particular groove-shaped recesses of the segment box from the side are inserted.

Preferably It is proposed that the sieve elements gap, perforated or wire sieves exhibit. It is also proposed that the sieve elements Metal, plastic or ceramic.

embodiments The invention are shown in the drawing, the perspective shows a segment box with three different sieve elements, of which a sieve element consists of three parts.

A sieve centrifuge has a sieve drum, which consists of a metal drum frame, in the frame-shaped curved segment box 1 made of metal, which are screwed to the drum frame. Each segment box 1 forms a sector of the screening drum and on the inside of the segment box is a sieve element 2 attached, which covers the segment box inside and is curved according to the segment box. The sieve elements 2 form the screen surface of the screen drum and have gaps, holes and / or slots 3 through which the liquid of the discontinued mixture penetrates to the outside.

The segment box 1 has a frame with two axially parallel axial webs 4 with intermediate webs arranged in parallel between the axial webs 5 and with two curved, arranged at right angles to the axial webs and intermediate webs end webs 6 to which the ends of the axial and intermediate webs are welded.

Both axial webs 4 have inside each an undercut groove 7 on, which extends in the longitudinal direction of the Axialsteges. For this purpose, each Axialsteg forms 4 an inwardly facing L-shaped strip-shaped projection 8th parallel to the longitudinal direction of the axial web, wherein the two groove openings face each other.

The sieve elements 2 have at their two non-curved side edges projections 9 on whose cross section of the cross section of the respective groove 7 equivalent. With these projections 9 the sieve elements are in the segment box from the side 1 einschiebbar, so that the sieve elements are held positively in the segment box. Anschwei It is not necessary to screw on or screw on.

The projections 9 may be formed by a continuous running, on the screen element protruding side edge in particular the screen surface, or the projections are from the two ends of transverse bars 10 formed on the back of the screen element 2 are attached. Such crossbars stabilize the screen surface and connect the profile bars in gap screens 11 together.

The sieve element 2 a segment box 1 can also be in two or more Siebelementabschnitte 2a . 2 B . 2c be split, side by side in the two grooves 7 einliegen a Siebelements.

Claims (10)

Sieve drum, in particular a sieve centrifuge with the sieve surface forming sieve elements ( 2 ), each on the inside of arched drum segment boxes ( 1 ) are fastened, characterized in that the sieve elements ( 2 ) to the segment box ( 1 ) are positively and releasably secured. A screening drum according to claim 1, characterized in that on each segment box ( 1 ) only one sieve element ( 2 ), which substantially covers the inside of the segment box. A screening drum according to claim 1, characterized in that on each segment box ( 1 ) two or more sieve elements ( 2a . 2 B . 2c ), which together substantially cover the inside of the segment box. Screening drum according to one of the preceding claims, characterized in that the segment box ( 1 ) on its inner side on opposite, mutually parallel outer edges each have a recess ( 7 ) in particular has an undercut groove, in each of which a longitudinal edge of the sieve element ( 2 ) rests positively. Screening drum according to one of the preceding claims, characterized in that the segment box ( 1 ) on its inside on mutually parallel outer edges, in particular a plurality of recesses ( 7 ), in which located at the edge of the screen element projections ( 9 ) einliegen. A screening drum according to claim 5, characterized in that the projections of the screening element from the ends of the transverse rods ( 10 ) are formed, which are fixed to the back of the screen surface. Screening drum according to one of the preceding claims, characterized in that the sieve elements ( 2 ) with its two opposite edges ( 9 ) at the straight or curved outer edges ( 4 ) of the segment box ( 1 ) are releasably attached. Screening drum according to one of the preceding claims, characterized in that the sieve elements ( 2 ) in the particular groove-shaped recesses ( 7 ) of the segment box from the side are inserted. Screening drum according to one of the preceding claims, characterized in that the sieve elements ( 2 ) Have gap, perforated or wire screens. Screening drum according to one of the preceding claims, characterized in that the sieve elements ( 2 ) made of metal, plastic or ceramic.