DE4344206A1 - Twin=roll machine for pressing friable materials - Google Patents

Abstract

The pressing machine has two rolls running in opposite directions with a clearance between them and a cylindrical casing containing the rolls. The roll jacket is composed of segments. Its division into segments can be axial or circumferential as required, to form at least two segments (2). The segments have holders and screws to form them into the jacket. The holders are undivided rings (3) spaced from the cylindrical surface of the roll casing (1) axially, alongside the segments. They are pressed in position by screws (5) so that their conical shoulder surfaces (8,9) are pressed virtually flush into side segment recesses (10).

Description

The invention relates to a two-roll machine for the pressure treatment of Bulk materials, in particular high pressure roller press for pressure reduction of granular, brittle bulk goods, with two counter-rotating and through a nip separate rollers that consist of a cylindrical Roller base body and one composed of individual segments Roll jacket exist, the segments of the roll jacket using Retaining devices and clamping screws releasably ver with the roller base are bound.

In the pressure treatment of bulk goods in two-roll machines, in particular not only for pressure reduction in high-pressure roller presses, but also for Compacting or briquetting in briquetting presses with a bulk material high pressure between two counter-rotating rollers, who which the surfaces of the rollers are subject to severe wear.

In order not to replace the entire rollers on worn surfaces it has proven itself to have a roller jacket on the roller base to be arranged detachably from individual segments, so that when necessary swap only the segments need to be swapped. The attachment of the segmen te on the roll body happens in known two-roll machines through screw or clamp connections.

Thus, in DE-A-39 27 884 a two-roll machine for compacting and / or crushing of bulk goods described, in which on the rolling basic body arranged roller jacket in the circumferential direction from individual Seg elements is composed. The individual segments, the width of the entire  Working width of the roller correspond to the side in the axial direction outside with a U-shaped clamping element with the roller base Clamping screws releasably connected, the clamping elements on the rollers base body. The clamping screws are in axially extending Grooves of the roller base body added.

Because the roll shell segments are not of any width for manufacturing reasons can be carried out and their attachment to known two-roll machines only on the sides, so the middle of the segment is large Warping segment widths under load is the case with these known two roller machines the effective working width of the roller by the width of the Segments limited.

It is an object of the invention to further develop a two-roll machine development of the known segment fastening based on a clamp connection create whose working width is not due to the width of the segments used is more restricted, and in which the fastening and loosening of the segments in is possible in a simple manner.

The task is solved with the features of the labeling part of the Claim 1. Advantageous embodiments of the invention are in the Unteran sayings.

By the inventive measure, the clamping rings and the segments so ge stalten that the clamping rings in the installed state almost completely from the Ausneh The segments are recorded, it is possible to add segments and Arrange the clamping rings in the axial direction next to each other and the one for proper operation of the closed two-roll machine required on the surface of the rollers, apart from a remaining joint. The The number of segments to be arranged side by side in the axial direction is at Application of the invention freely selectable and the two-roll machine can thus with regard to their size (width) the desired throughput rates, independent gig of the width of the individual segments.  

According to the invention, the division of the rollers is also in the circumferential direction jacket freely selectable in segments, but according to an advantageous Ausge staltung of the invention this division can be omitted, so that then the whale zenmantel formed from bandage rings, which are arranged axially next to each other becomes. The bandage rings are axial at one point for easier assembly severed. This is possible because the bandage rings are firmly seated on the Roll body not like in known two-roll machines by Auf shrink, but obtained by the clamping rings according to the invention.

Further details, advantages and features of the invention result from the following explanations of an Aus shown in drawing figures leadership example.

Show it

FIG. 1 is an axial section through a roller having two axially adjacent segments;

Fig. 2 is a radial section along the line II-II in FIG. 1.

In Fig. 1, two segments ( 2 ) are arranged on a cylindrical roller base body ( 1 ) in the axial direction next to each other, which is fixed in the circumferential direction by a feather key ( 4 ), which is introduced into corresponding grooves ( 13 , 14 ), with the roller base body become.

Undivided clamping rings ( 3 ) are arranged in segment recesses ( 10 ) laterally in the axial direction next to the segments ( 2 ) and at a distance from the cylindrical surface ( 12 ) of the roller base body ( 1 ). The clamping rings ( 3 ) have flat end faces ( 17 ), flat outer surfaces ( 11 ) and opposite inner surfaces with two conical shoulder surfaces ( 8 , 9 ). Since the segment recesses ( 10 ) are adapted to the shape of the clamping rings ( 3 ), the clamping rings ( 3 ) fill the segment recesses ( 10 ) almost completely in the assembled state, their flat outer surfaces ( 11 ) being flush with the segment side surfaces ( 15 ) and the conical shoulder surfaces ( 8 , 9 ) bear against correspondingly conical surfaces of the segment recesses ( 10 ).

By means of a clamping screw ( 5 ) which is guided through the segment bore ( 18 ) and through bores ( 19 ) of the clamping rings and tightened with the screws ( 7 ), the clamping rings are pressed laterally into the segment recesses ( 10 ) in the axial direction, whereby the segments ( 2 ) are pressed radially against the roller base body ( 1 ) via the conical shoulder surfaces ( 8 , 9 ).

The accuracy of fit of clamping rings ( 3 ) and segment recesses ( 10 ) is so high that in the installed state only a narrow gap ( 16 ) remains between the segments ( 2 ), but the effectiveness of the working surface ( 20 ) of the segments ( 2 ) is not diminishes.

In the illustrated embodiment, as shown in FIG. 2, the roller shell is divided into four segments ( 2 ) in the circumferential direction, which are detachably connected to the clamping rings ( 3 ) by four clamping screws ( 5 ) each and each with four parallel keys ( 4 ) the roller base body ( 1 ) are detachably fixed in the circumferential direction.

The invention is regarding the number and arrangement of the parallel keys and Tensioning screws are not limited to the exemplary embodiment mentioned. Also according to the invention, the number and shape of the segments can vary from the one shown management example deviate, for example by using molded recesses segments for the briquetting of bulk goods.

Claims (3)

1. Two-roll machine for the pressure treatment of bulk materials, in particular high-pressure roller press for pressure comminution of granular, brittle bulk goods, with two counter-rotating rollers separated by a roller gap, which consist of a cylindrical roller body and a roller shell composed of individual segments, wherein the segments of the roll shell are releasably connected to the roll base body by means of holding devices and clamping screws, characterized in that

• a) the division of the roll shell into segments in the axial direction and in the circumferential direction is freely selectable, the roll shell being divided into at least two segments ( 2 ) in the axial direction;
• b) the holding devices are designed as undivided clamping rings ( 3 ), which are arranged at a distance from the cylindrical surface of the roller base body ( 1 ) in the axial direction to the side next to the segments ( 2 ) and with the aid of clamping screws ( 5 ) with their conical shoulder surfaces ( 8 , 9) mentausnehmungen in corresponding lateral Seg (10) are pressed so that they are accommodated almost entirely from Segmentausnehmungen (10) and their outer flat surface (11) aligned with the segment side surfaces (15);
• c) the segments ( 2 ) by axially parallel keys ( 4 ), which are introduced in corre sponding keyways ( 13 , 14 ) between the segments ( 2 ) and the roller base body ( 1 ), with the roller base bodies are detachably fixed in the circumferential direction.

2. Two-roll machine according to claim 1, characterized in that the Roll shell, which is divided into segments only in the axial direction, from parallel arranged roller jacket rings (bandage rings) is composed. 3. Two-roll machine according to claim 2, characterized in that the Roll sleeve rings are axially severed at any point.