DE2152636A1 - SILO FOR PRODUCTS THAT ARE HARDLY STARTING AND EXPIRING - Google Patents

Description

2152638

September 28, 1971 Pat / lie As MIAG (EM 1529)

Silo for products that are difficult to start and run out of

The invention relates to a silo for products that are difficult to start and stop, in particular for silos with a circular shape or polygonal cross-section.

The loose storage of heavy arriving and leaving bulk goods in silo cells is today for handling facilities and for the most diverse branches of industry - for example oil mills, concentrate plants - to safeguard the operation and for the Profitability of production is an indispensable necessity. It is necessary that any disturbance or undesirable Interruption of the production process or the material flow as a result of poor processing of the stored goods from the silo is avoided.

In the case of rectangular silo cells with sloping floors sloping towards a floor outlet and in the case of cylindrical silo cells with a conical discharge funnel, prepares the discharge of the silo content, especially when it comes to poorly flowing products, insofar as difficulties than as a result of the high pressures occurring and the strong reduction in cross-section in the silo foot section above the outlet easily form bridge-like accumulations, which make it difficult for the stored goods to run in and out and up to the point of interruption leakage.

In order to eliminate such malfunctions as far as possible, various starting and stopping of the silo contents have already been implemented promotional and favoring facilities proposed, which focus in particular on the formation of the silo foot section and the internals arranged therein. Relief bodies of different shapes have become known,

309817/0158

09/28/1971 Pat / He / Ls MIAG -2- (EM 1529)

which serve the purpose of removing the floor outlet from the one above To relieve the bulk material column and to loosen the bulk material directly above the outlet. At a these embodiments, especially for a silo with a rectangular cross-section and with two opposite, one running over the entire silo depth Inclined floors sloping towards the central spout Ehtlastungskörper from a roof-shaped above, arranged above the opening and parallel to it running bar, which at the level of the approaches of the sloping floors or a little above its largest cross-section and with a slightly reduced cross-section, bia extends almost over the floor outlet. This will provide some relief of the outlet and a loosening of the silo above the outlet, so that congestion in the outlet area as far as possible be avoided.

The above-described structure of a silo for products that are difficult to start and run out refers to, as I said, to silos with a rectangular cross-section and cannot be transferred to a cylindrical silo without special structural measures.

The original form of a container for storing bulk goods is the round cell. Silo cells of this type are particularly suitable for rows of large spaces because, as is known, due to their shape, the horizontal forces caused by the filling are advantageously absorbed by their walls. In the case of cylindrical silos bit conical discharge funnels, as already mentioned, strong compaction of the material occurs in the discharge area, which, especially in the case of difficult-to-flow products, can lead to undesired bridging and thus to disturbances and interruptions of the discharge.

3Ö9817 / 0156

09/28/1971 Fat / He / Ls MIAG - 3 - (EH 1529)

In order to avoid this compaction and also to loosen up the bulk material above the outlet, there is a cell shape has been developed, with a cylindrical base on a square base with cross saddles in the middle Silo cell is attached. The inner length of the side walls of the substructure is equal to the inner diameter of the cylindrical part. The purpose of this is that on the one hand there is good when it comes out of the cylindrical upper part slides down, loosens itself in the square substructure, and that on the other hand the one at the bottom of the substructure and in its corner zones not covered by the cylindrical upper part, outlets of the Bulk column are relieved. Disadvantageous with this one The shape of the silo is that at least two discharge conveyors are required to withdraw the contents of the silo, and that the construction its substructure is complicated and expensive.

The invention is based on the object, in particular for silo cells with a circular or polygonal cross-section a simple structure and only with to find a silo foot part equipped with an outlet, which causes a trouble-free discharge of the silo contents, even if it is a question of products that are difficult to start and stop.

The object is achieved according to the invention by the combination of the features known per se that the silo upper part is cylindrical on the inside and that the silo foot part is inside is rectangular that the shapes of the two clear cross-sections do not intersect at the transition point, that two opposite walls of the silo foot part merge into sloping floors that end in an outlet slot, and that over

3ÖÖ81_7 / 0156

09/28/1971 Pat / He / Ls MIAG -4- (EM 1529;

A relief beam is arranged in the outlet slot.

The inventive design of the silo foot part is achieved that the from the cylindrical silo upper part Downward sliding material into the not covered by the upper part and from the pressure of the bulk material sow Relieved corner zones of the foot part can flow relaxed and loosened up to the Auelauf in its area the relief bar arranged above it with simultaneous relief of the outlet a further loosening he follows. In order to reduce the cross-section and thus compress the bulk material through the relief beam in the To avoid the area of the transition from the cylindrical upper part of the silo to the foot part, according to a further embodiment of the invention, the ratio of the diameter of the upper part of the silo to the greatest width of the relief bar is at least five. This value results from the difference between the connection surfaces of the two silo parts.

Next is on the one hand by the distraction of the goods at Transition into the relieved corner zones and through the repeated opposite deflection to the sloping floors a den Shear effect favoring the flow of material is generated, and on the other hand, the lower bulk material layer lying on the sloping floors is given a shear force directed towards the outlet. If then, according to a further embodiment of the invention, the lower edges of the down evenly or step-shaped tapering, roof-shaped relief beam, the largest width in the area of Sloping base approaches, from those opposite them Inclined floors have a distance of about the width of the outlet slots, the silo contents can be unhindered under the Relief bar pass through into the outlet relieved by it and can be pulled off without jamming.

3Öä8l7 / 0156

- 5 - ■

£ 152,836

09/28/1971 Pat / He / Ls MIAG -5- (EM 1529;

An embodiment of the invention is shown in the drawing and is described in more detail below. Show it

Fig. 1 shows a cross section through a cylindrical silo with a rectangular base and with one above Spout arranged relief beams and

FIG. 2 is a plan view of the silo shown in FIG.

The cylindrical upper part 1 of a silo stands up in the middle a foot part 2, which iet rectangular inside. In the transition point of the silo upper part 1 to the silo foot part 2 is the Connection cross-section of the foot part 2 is a square, the sides of which with the bottom circular connection cross-section of the Tangent silo upper part 1, so that the Eckxonen of the foot part 2 protrude beyond the lower cross section of the upper part 1, and thus relieved of the pressure of the bulk material column are. The silo foot part 2 consists of two opposite, vertical walls and two connecting them ·, in Sloping floors merging walls. The two sloping floors 4 sloping down from the transition point 5 to an axis of the foot part 2 end in one of them the entire width of the outlet slit 9 * Above the outlet slit 9 and parallel to it is to relieve it from the pressure of the bulk material column in the foot part 2 a top Roof-shaped relief beam 6 is arranged, which has its greatest width 7 in the area of the transition point 3 has and «with a little reduced cross-section extends down to almost over the outlet slot 9, the shortest distance 5 its lower edges 10 from the sloping floors 4 opposite them corresponds approximately to the width of the outlet slot 9.

The shape of the relief bar 6 shown in Fig. 1 represents only one of various possibilities, so can for

3Ö9817 / 0156
- 6 -

09/28/1971 Pat / He Ae MIAG - 6 -, (St. 1529)

For example, its cross-section reduction running from top to bottom can be implemented in one or more stages or can also be achieved by curved side walls, the curvature of which can go outwards or inwards. Nor does it need to protrude into the top. The greatest width 7 of the relief bar 6 amounts to a maximum of one fifth of the diameter of the cylindrical upper silo part 1, so that no cross-sectional narrowing occurs due to the widening SiIo foot part 2 in its upper area. In doing so, its width, at least at its lower end, smaller than that of the outlet slot 9, because even a partial loosening, which is effective up to the outlet, is sufficient for a trouble-free flow of the goods.

The inclined floors 4 are trough-shaped in their upper part following the transition point 3 and then go into flat slopes ending in the outlet 9, the polar axis of the radius 8 of the trough in the im Area of the transition point 3 extending upper kink edge of the relief alkena 6 lies. By this in itself known design of the inclined floors 4, the start and P run-out of the silo contents is also favored.

The advantages achieved by the combination according to the invention of features known per se exist in particular in that at favorable structural and demanded without Effort Silos for products that are difficult to run up and run out can also be designed in a cylindrical shape and with a large cell diameter.

Of course, instead of a cylindrical upper part, an upper part with a polygonal »or with it step from top to bottom widening cross-section.

- 7 -309817/0156

Claims (3)

2152631 September 28, 1971 Pat / He / Le MIAG - 7 - (EM 1529) Claims Ip for products that are difficult to start and stop running, identified by the combination of the characteristics known per se, that the silo upper part (1) is cylindrical on the inside, that the silo foot part (2) is rectangular on the inside, that the shapes of both clear cross-sections the transition point (3) do not cut that two opposite walls of the silo foot part merge into sloping floors (4), which end in an outlet slot (9) and that a relief beam (6) is arranged above the Auelaufschlitz. 2. Silo according to claim 1 with a circular cylindrical upper part and square foot part, characterized in that the ratio rom the diameter of the silo upper part (1) to the width (7) of the relief beam (6) is at least five. 3. Silo according to claim 1 or 2, characterized by the use of a known relief beam (6), the largest width (7) of which lies in the area of the sloping bottom (4) approach (3), the width of which is (7) downwards only a little Terringert and its lower edges (10) tone the sloping floors opposite them have a distance (5) τοη approximately the width of the outlet slot (9). 309817/0158 Blank page