DE2309900A1 - ARMOR RING FOR DEFLECTING A FLOW OF DUST GAS FOR EXAMPLE AT MUHLEN - Google Patents

Description

Loesche hard crushing and cement machines KG Düsseldorf, Steinstrasse 18

Armored ring for deflecting a dust gas flow to

Example at mills

The invention relates to the design and arrangement of an armored ring for deflecting a dust gas flow. Such Armored rings are known in various embodiments. Because they divert the air flow with grist particles they are subject to particularly high mechanical wear. You therefore had to come from a wear-resistant, especially expensive material can be produced.

The object on which the invention is based is to develop an armored ring for deflecting the dust gas flow, which can be produced at reasonable costs and which in particular has procedural advantages as a result offers that it can be used in different installation positions, so that the operating time until the required final Replacing due to wear can be increased significantly.

The invention consists in that the cross-sectional area of the armor ring is shaped in a very specific V / eise, namely consists of two trapezoids placed one on top of the other with the broad base line, two outwards and two towards the outside Inside protruding surfaces are created that each form a protruding edge on the outside and inside. Here it comes, however does not depend on being mathematically accurate

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Trapezoidal surfaces are used because, for example, the different Edges can also be made rounded. It is crucial that two each to the outside and two to the inside protruding surfaces are created that each form a protruding edge on the outside and inside. However, the surfaces can be in themselves also be arched. The armored ring has holes to accommodate a screw connection, the top and bottom in End recesses whose diameter is larger than the diameter of the holes. The armored ring can be related in cross section be designed symmetrically on the bolt axis. In one embodiment of the invention, there is the armored ring from individual pieces or segments that can be joined together. The upper trapezoid of the cross-sectional area of the armored ring can have a lower height than the lower trapezoid, so that the outwardly and inwardly protruding edge of the armor ring located in the upper half of the cross-sectional area. The upper trapezoid can also have a greater height than the lower one Own trapezoid. In a further embodiment of the invention the end faces of the armored ring segment are arranged at an angle that each one when assembling Arrangement with a left curvature or with a right curvature results. However, it is also possible to design the end faces in such a way that that they have a double bevel, each with the same angle of inclination, so that they can be combined to either a right or left curve.

The technical progress of the invention is that the armored ring or the individual armored ring segments on both sides have wear surfaces with a protruding edge. This offers the opportunity for the armored ring to achieve a significantly longer wear time. By dividing it into individual segments, it offers the advantage that each segment can be rotated around its vertical central axis by 180, as soon as the armor ring edge on one side worn on the inside of the

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2309300

Panzerringes was located. By turning the segment, it is possible to put the not yet worn edge into operation gain weight. Furthermore, each segment can be rotated by 100 about its horizontal longitudinal axis, so that the low trapezoidal surface is at the bottom, the protruding edge is lower and the angle of inclination in relation to the oncoming gas is itself changes. The inclination is increased when the small trapezoid is at the bottom, so that a sharper gas deflection is achieved. This is important if, for example, the grist is thrown out behind a roller in the shape of a strand and. a sharper gas deflection is required to get the rough Well better to throw back on the grinding bowl. It can also be useful to have only individual segments around their longitudinal axis to turn 180 ° in order to achieve a local sharper deflection. It is also advantageous that both the turning Armored ring segments or replacement can be done with little effort.

In the drawing, an embodiment of the invention is shown when used in a roller mill.

Fig. 1 shows a schematic representation of the arrangement of the grinding bowl in a roller mill with armored ring segments left in section and right in view;

Fig. 2 shows an enlarged representation in the side view of the outer edge of a grinding bowl with indicated Grinding rollers and representation of several armored ring segments;

Fig. 5 shows the sectional view of an armored ring according to Section III-III in Fig. 4;

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Fig. 4- shows a top view of a fan ring segment Representation of the double-sided bevelled faces ;

Fig. 5 shows two possible arrangements of armored ring segments.

Fig. 1 shows the arrangement of a grinding bowl 7 within a roller mill with the outer jacket 8. During operation there is a rotation of the grinding bowl 7 »which has blades 9 on the outer edge, which are arranged in a ring Form the blade ring. Above the grinding bowl 7 are the stationary, but vertically pivotable Grinding rollers 11. An air flow is generated by the blades 9, which at the top of the blade ring with the Shovels 9 exiting at high speed, the grist being carried upwards. The one on the grinding bowl 7 Sufficiently finely comminuted grist is led through the gas stream to a classifier (not shown), which is in the upper part the roller mill is arranged, while the not yet sufficiently comminuted material, namely the semolina, is as short as possible Way of the grinding bowl 7 is to be fed again. Depending on the size of the flow angle of the armored ring is here the gas flow is deflected more or less strongly towards the center of the mill, as indicated by the arrows drawn in FIG. 1. The described mode of operation within a roller mill, which is more or less always the same in mills of this type is, so causes the high signs of wear on the armored ring. The armored ring can be used wherever a Dust gas flow is to be deflected.

Fig. 2 shows in an enlarged representation those parts of a roller mill which are located within the ring 12, which is shown in FIG. 1. The illustration shows in particular the deflection of the gas flow on the inside protruding nose of the armored ring.

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! 'ig. 5 shows the. which has a hole 2 for receiving a screw connection, which is not shown.

The hole 2 for receiving the screw connection is provided with recesses 3j 4 · at the bottom and top, which are for receiving the heads serve for screwing.

Fig. 4- shows the plan view of an armored ring segment 1, the end faces of which have a double bevel 5 »6, which have the same angle of inclination.

Fig. 5 shows the options for assembling an armored ring from individual armored ring segments 1, which therefore optionally have a right or left curvature can.

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Claims (8)

Claims Armored ring to divert the exhaust gas flow on the outside Edge of the grinding bowl, which forms the outer, upper side closure of the grist throw path in roller mills, characterized in that the cross-sectional area of the armored ring (1) consists of two with the broad base line stacked trapezoids or trapezoidal surfaces consists, whereby two outwardly and inwardly protruding surfaces arise, the outside and inside each form a protruding edge. 2. armored ring according to claim 1, characterized in that the armored ring (1) has holes (2) for receiving a screw connection has, which are in recesses (3, 4-) at the top and bottom, the diameter of which is greater than the diameter of the holes (2) are. 3. armored ring according to claim 1 and 2, characterized in that the armored ring (1) is symmetrical in cross section is. 4. armored ring according to claim 1 to 3, characterized in that the armored ring (1) consists of individual attachable Segments. 5. armored ring according to claim 1 to 4-, characterized in that that the upper trapezoid of the cross-sectional area of the armored ring (1) has a lower height than the lower trapezoid, so that the outwardly and inwardly protruding edge of the armor ring is in the upper half of the cross-section sf pool is located. 409835 / Ü223 6. armored ring according to claim 1 to 4, characterized in that the lower trapezoid of the cross-sectional area of the armored ring (1) has a lower height than the upper trapezoid, so that the outward and inward protruding Edge of the armored ring is located in the lower half of the cross-sectional area. 7. armored ring according to claim 1 and 4, characterized in that the end faces (5) of the armored ring segment (1)
are arranged obliquely in such a way that when the individual segments (1) are put together, an arrangement with a left or right curvature results (Fig. 5). 8. armored ring according to claim 1 and 4, characterized in that the end face of the armored ring segment (1) has a
double bevel (5 »6) with the same angle of inclination, so that optionally when the segments (1) are put together, a right or left curvature results. A09835 / U223 Blank page