EP2196408B1 - Flexible silo - Google Patents

Description

The invention relates to a flexible silo according to the preamble of claim 1. Silos are bulk storage for storage or storage of stored goods, in particular of bulk material, and are known. In silos powder, granules, wood chips and / or pellets can be stored. In particular, feedstuffs, for example cereals, heating means, for example wood pellets and / or wood chips, and / or semi-finished products, for example plastic granules and / or plastic powders, can be stored in the silo. Flexible silos are often - temporarily or permanently - in buildings or attached to buildings, since flexible silos can be produced inexpensively and inexpensively mounted, so built into the building or attached to this can be. In particular, the building may be a single or multiple dwelling, an office building, a factory and / or a factory.

Flexible silos usually have a silo volume between 0.5m ³ and 100m ³ . The invention particularly relates to flexible silos which have a silo volume between 0.5m ³ and 100m ³ and are suitable for the storage of heating means for one to two heating seasons of a building, in particular a single or multiple dwelling, a factory or a factory.

From the CH 689 555 A5 a receptacle for bulk material is known, which has a Räumorgan and arranged at the lower end of the container walls outlet device.

From the DE 93 11 790 U1 a device for bunkering, separating and dosing of fiber material is known, which has a stirring finger and a turntable at the bottom. From the DE 20 2006 006 242 U1 a device for receiving free-flowing material is known, which has an outlet pipe.

From the US 5 564 329 A is a solid silo for bulk-like cooking ingredients known, wherein on the V-shaped tapered bottom of the silo a screw conveyor is arranged.

From the DE 20 2004 002 601 U1 a device for dosing bulk materials is known, which has a container with a bottom arranged agitator. A disadvantage of conventional flexible silos is that the removal of the stored material is often unreliable, with the reliability of the removal often changes with the filling level of the flexible silo or wherein the sampling system is clogged and to maintain or clean. In this case, the difference of the maximum filling height can be limited to the minimum filling level of the flexible silo, whereby the usable filling level of the silo is limited.

The object of the invention is therefore to provide a flexible silo of the type mentioned, with which the mentioned disadvantages can be avoided, from which the stored goods can be removed with high reliability and which in this case has a high usable degree of filling.

This is achieved by the features of claim 1 according to the invention.

As a result, the removal of the storage product can be carried out particularly reliably, wherein the reliability in the removal of the stored material is substantially independent of the filling level of the stored material in the flexible silo by the Rührwerksaustragung. The advantage here is that the high reliability of the removal of the stored material is largely the same with largely filled flexible silo and largely emptied silo. The advantage here is further that the difference in the filling amount of the stored material between maximally filled and minimally filled silo can be particularly large, so that the usable degree of filling of the flexible silo can be particularly high.

In particular, it is possible for the flexible silo to be filled substantially completely, that is, as far as a silo corner, and to be emptied completely by means of the agitator discharge, ie, except for a few storage residues. Particularly in the case of flexible silos with a height of several meters, the uniform reliability of the removal of the stored material, which is made possible by the agitator discharge, is particularly advantageous for all fill levels of the stored goods between the largest fill level and the lowest fill level. The advantage here is that the flexible silo allows a high space utilization, which is in particular between 80% and 90% of the theoretically available silo volume. Dead volume in the flexible silo can be kept so low.

The subclaims, which as well as the patent claim 1 simultaneously form part of the description, relate to further advantageous embodiments of the invention.

• Fig. 1 schematisch im Schnitt eine Seitenansicht auf den flexiblen Silo einer bevorzugten ersten Ausführungsform in der Betriebslage des Silos;
• Fig. 2 den Silo nach Fig. 1 schematisch im Schnitt in einer Aufsicht;
• Fig. 3 den Silo einer vorteilhaften zweiten Ausführungsform schematisch in einer Schrägansicht und mit teilweise geschnittener Ansicht der Silohülle;
• Fig. 4 den Silo einer vorteilhaften dritten Ausführungsform schematisch in einer Schrägansicht und mit teilweise geschnittener Ansicht der Silohülle; und
• Fig. 5 den Silo einer vorteilhaften vierten Ausführungsform schematisch in einer Schrägansicht und mit teilweise geschnittener Ansicht der Silohülle.

The invention will be described in more detail with reference to the accompanying drawings, in which only preferred embodiments are shown by way of example. Showing:

• Fig. 1 schematically in section a side view of the flexible silo a preferred first embodiment in the operating position of the silo;
• Fig. 2 the silo after Fig. 1 schematically in section in a plan view;
• Fig. 3 the silo of an advantageous second embodiment schematically in an oblique view and with a partially sectioned view of the silo shell;
• Fig. 4 the silo of an advantageous third embodiment schematically in an oblique view and with a partially sectioned view of the silo shell; and
• Fig. 5 the silo of an advantageous fourth embodiment schematically in an oblique view and with a partially sectioned view of the silo.

The Fig. 1 to 5 show different views of a preferred first and an advantageous second, an advantageous third and an advantageous fourth embodiment of a flexible silo 1 with a silo 2 and with a silo 3, wherein the silo 3 is at least partially supported by the silo 3. In the silo 1, a stirrer discharge 4 is provided for the reliable removal of storage goods stored in the silo 1.

In this way, the disadvantages mentioned above can be avoided. Surprisingly, it has been shown that the reliability of the removal of the stored material from the silo 1 remains substantially constant with variable filling level of the silo 1 and in particular can remain constantly high. This can improve or facilitate the subsequent further transport of the stored goods. In this case, it is advantageous in particular that the flexible silo 1 can be completely filled with stored goods, ie as far as a silo corner. Another advantage is that the flexible silo 1 can be emptied particularly thoroughly, in particular with the exception of a few storage residues of the possible filling volume. The difference between the usable maximum filling level of the silo 1 and the usable minimum filling level is particularly high.

The flexible silo 1 can be designed as a so-called sack silo. In this case, the silo shell 3 is bag-shaped, in particular so that it is in the form of a foil, and can be referred to as a flexible silo shell 3 since it is flexible in terms of shape. In particular, the silo 3 may be formed as a fabric film, whereby the silo 1 can also be referred to as a fabric tank. In particular, the silo envelope 3 may comprise a dust-proof and antistatic fabric film. In an advantageous embodiment, the silo 3 may be provided in the bottom region of the flexible silo 1 with a moisture protection. Likewise, the silo 3 may be plate-shaped or sheet-shaped, wherein the silo 3 may comprise in particular one or more plastic plates or one or more metal sheets.

The flexible silo 1 may be round, square, rectangular or polygonal in its base. For the installation of the flexible silo 1 can be located on one side of the silo 3 a zipper entry door.

The silo 2 is to be provided for at least partially carrying the silo 3 and can support the silo 3 and the silo 1 in particular to the side. The silo rack 2 is placed on a base 7 and is provided for stable installation of the silo 1 and for introducing - in particular weight-related - forces from the silo 1 in the substrate 7. The silo 2 can hold the silo 1 in its desired position and prevent tilting and can prevent collapse of the silo 3 both during filling and during emptying. The silo 2 may comprise a galvanized steel frame.

Depending on the local fire protection regulations, the flexible silo 1 can either be installed directly in a boiler room, in a room provided for the flexible silo 1, in particular a storage room, and / or outdoors, in particular outdoors protected against the weather.

In a particularly advantageous manner can be provided that - seen in the operating position of the silo 1 - the Rührwerksaustragung 4 is disposed adjacent to a silo bottom 11. It is advantageous that the silo bottom 11 - as in Fig. 1 to 5 shown - may be executed substantially flat and at least partially rest on the substrate 7. The advantage here is that the weight forces of stored in the silo 1 stored goods - at least partially - absorbed by the silo 3 in the area of the silo bottom 11 and can be introduced substantially directly into the ground 7, so these forces do not have the silo 3 and the silo 2 must be initiated in the underground 7.

Due to the fact that the silo 1 extends as far as possible uniformly in its base surface to the ground 7, the silo 1 can be largely self-supporting or self-standing. The advantage here is that hiebei both the silo 2 and the silo 3 are less burdened, so that the silo 1 thereby can have a longer life and thus the silo 2 and the silo 3 can be made easier and with less material use. In particular, it is not necessary to use fabrics as strong as in conventional sack silos. The advantage here is that both the manufacturing costs and the weight of the silo 1 can be reduced.

Thus, it has proved particularly advantageous in the case of the silo 1 according to the invention that the non-discharged stored material is mixed during the movement of the agitator discharge 4, whereby a segregation of the stored material in the silo 1 can be counteracted. This too has proved to be advantageous for achieving the uniformly high reliability of the removal of the stored goods.

The stored product can be, for example, granulated, powdered and / or chopped. This type of stored product has, for example, biomass, animal feed, plastics and / or wood chips. The stored material can be, for example, a fuel for firing a biomass firing.

The flexible silo 1 can be formed with a height between 1m and 15m. In particular, the flexible silo 1 can have a height of between 1.5 m and 4 m and can be provided for arrangement in rooms, in particular in basements. In particular, the flexible silo 1 can be provided for a filling capacity of 2.2 to 10.5 tons.

In particular, it can be provided that the silo envelope 3 is reinforced in the region in which the agitator discharge 4 is arranged. In particular, it can be provided that the silo bottom 11 is designed to be dimensionally stable - in the case of a conventional load. For this purpose, the silo bottom 11 may be formed, for example, as a molded part. The advantage here is that the silo bottom 11 may be protected against chafing.

The silo shell 3 can also be reinforced on the side of the at least one agitator arm 41, wherein the agitator arm 41 can be arranged in particular in the bottom region 12 of the silo 1. For this purpose, the silo sheath 3 may be reinforced throughout the floor area 12. It can thus be provided that the silo 1 is reinforced in the area in which the agitator discharge 4 is arranged, which makes it possible to ensure that the entire bottom area 12 is designed to be dimensionally stable - in the case of conventional storage load. It can be prevented that movements of the Rührwerksarms 41 deform the silo 3 clearly visible.

Advantageously, the silo bottom 11 and / or the silo shell 3 in the entire base region 12 may be made of wood, metal and / or plastic.

The silo bottom 11 and / or the silo shell 3 in the entire bottom area 12 may be formed in one piece or in several pieces. The multi-piece silo bottom 11 and / or the silo shell 3 in the entire floor area 12 may be foldable, whereby the simple transport of the silo 1 can be ensured.

The silo shell 3 may be formed impermeable to water - at least in the region of the silo bottom 11. The use of a water-impermeable fabric as a silo envelope 3 has proved to be particularly advantageous. The silo 3 may be plastic coated or formed as a plastic sheet. The advantage here is that the stored goods can be stored protected from dirt and water so.

The silo 2 may comprise a plurality of rod-shaped rods and may be formed of wood, plastic and / or metal. In particular, the silo 2 may comprise a plurality of steel bars.

In a particularly advantageous manner, it can be provided that the silo rack 2 comprises adjusting means 21 for adjusting the maximum capacity of the silo 1. By means of the adjusting means 21, the capacity of the silo 1, which can be referred to as silo volume, are easily and quickly adjusted. The agitator 4 has proved to be particularly advantageous: Since the reliability of the discharge of the stored material in dependence of the level, in particular the filling height of the silo 1 essentially does not change in the inventive flexible silo, so the silo height can be greatly changed. In this way, the silo volume in the flexible silo 1 according to the invention can be varied particularly strongly, in particular by up to 250%, whereby the adjusting means 21 can be particularly useful here.

In particular, when a large part of the weight of the stored material is not transferred to Silogestell 2, but rather are introduced directly into the substrate 7 via the silo bottom 11, the adjusting means 21 need only absorb small forces and can be designed accordingly simple and inexpensive.

Advantageously, it can be provided that the silo frame 2 is adjustable in height by means of the adjusting means 21, so that the silo 1 can be adapted to different room heights. Such adjusting means 21 are shown schematically in FIG 4 and 5 shown. In particular, individual linkage parts of the silo frame 2 can be longitudinally adjustable, that is to say can be pulled apart or inserted into one another.

The silo 2 may also be designed hinged or extendable. In this case, the silo 3 Silogewebe be pre-assembled in the folded state of the silo frame 2. The advantage here is that in the construction of the silo 1 of these essentially only needs to be unfolded, so that the assembly can be particularly particularly quickly and inexpensively. Such silos 1 can be broken down especially often for one to several days events, for example, for fairs, live performances, concerts and the like, particularly inexpensive and again.

In another advantageous embodiment of the silo 1, provision can be made for the silo sheath 3 to have a substantially dimensionally stable design when used under normal load conditions, ie during loads such as these during filling and when the stored material is removed from the silo 1. For this purpose, the silo 3 consist of several plates which can be folded or adjusted relative to each other.

For the installation of the silo 1, a door can be provided in the silo 1, which, however, is not necessarily required for filling. This can be provided for the service case. If the door is arranged in the region of the silo corner, it can be used to charge the silo 1 through it, for example by pouring it in.

The filling can be done with at least one injection nozzle 8, as in Fig. 1 and 2 is shown. The injection nozzle 8 encompassed by the silo 1 can be arranged in particular in the upper region 18 of the silo 1.

In particular, the injection nozzle 8 can be designed to be height adjustable. The advantage here is that the injection nozzle 8 can be moved down with empty silo or substantially empty silo. The advantage here is that a drop height - in which the blown in storage falls downwards in free fall - between injection nozzle 8 and the storage material located in the silo 1 can be kept low. This can be particularly advantageous for sensitive stored goods. In this case, at least one of the at least one injection nozzle 8 can be moved together with the storage goods filling level of the silo 1 substantially upwards together, in particular upwardly displaced.

Advantageously, in particular in connection with the height-adjustable injection nozzle 8, it can be provided that the silo envelope 3 is at least - seen in the operating position of the silo 1 - in the upper region 18 of the silo 1 as a flexible silo fabric and that this flexible silo fabric - compared to the silo 2 - Tailored with an oversize 19 upwards, as in Fig. 1 is shown. When viewed in the operating position of the silo 1 - upwardly directed oversize 19 can be provided that the injection nozzle. 8 is pushed upward over the upper end of the silo frame 2 out and that the silo 1 is filled at the top end of the silo frame 2 addition. The advantage here is that the maximum possible silo volume can be increased with the same geometry of the silo frame 2. An advantage here is further that the silo 1 can continue to be easily constructed and that caused by the excess 19 of the silo 3 and the height adjustment of the injection nozzle 8 additional costs are low. If the silo 1 is at least partially emptied, it is advantageous that the injection nozzle 8 can be moved downwards and the oversize 19 of the silo shell 3 can substantially automatically collapse downwards, whereby the silo shell 3 essentially only above the silo frame 2 upwards stands out if additional, in particular short-term additional silo volume is needed. The filled with stored material oversize 19 may be formed in particular hump-shaped, as in Fig. 1 is shown, wherein the oversize 19 relative to the silo 2 can also be more pronounced than in Fig. 1 is shown.

In the Fig. 1 to 5 shown Rührwerksaustragung 4, which is advantageously suitable for the promotion of biomass from a silo 1 in a biomass furnace, also includes a stirrer 9 with a main axis of rotation and may be provided in particular for at least partially near-ground arrangement. The agitator 9 is provided for stirring in the silo 1 and may comprise the substantially horizontally rotating components of the Rührwerksaustragung 4, ie in particular at least the at least one Rührwerksarm 41 and a central agitator shaft which holds the at least one Rührwerksarm 41. The agitator discharge 4 comprises the agitator 9 and the screw conveyor 42 arranged between the agitator and the silo bottom 11.

The main axis of rotation of the agitator 9 may in particular be arranged substantially vertically.

In the operating position of the Rührwerksaustragung 4 seen - as in Fig. 1 to 5 shown - can be arranged under the agitator 9, the screw conveyor 42.

The screw conveyor 42 may in particular be exposed in the direction of a substantially horizontal plane, and in particular substantially horizontally.

The bottom surface of the silo 1, that is to say the silo bottom 11, is arranged substantially in a horizontal plane and is substantially flat. The advantage here is that the silo bottom 11 can lie substantially flat and large area on the substrate 7 and that while the weight of the stored material substantially can be worn directly from the ground 7. In this way, the silo rod 2 can be relieved of load and / or accordingly made thinner, lighter and / or more cost-effective.

In particular, it may also be provided in this context that the main axis of rotation of the agitator 9 of the agitator discharge 4 is arranged substantially perpendicular to the substantially horizontal silo bottom 11, wherein the main axis of rotation of the agitator 9 while within 5 °, in particular within 3 °, preferably within 2 °, may be oriented to a perpendicular. In this way, the agitator arm of the agitator discharge 4 can act substantially parallel to the silo bottom 11.

In an advantageous embodiment it can be provided that the screw conveyor 42 is arranged substantially horizontally, wherein the screw conveyor 42 can be provided particularly advantageous for conveying the biomass, the feed and / or the plastic granules from the silo 1.

With the silo 1 can be provided that the stored material is detected in a removal step of the Rührwerksaustragung 4 and discharged from the flexible silo 1, that is conveyed out of the silo 1. The discharge takes place in particular in the bottom region 12 of the silo. 1

In particular, it may be provided that the stored product is moved in the removal step by means of at least one agitator arm 41 of the agitator 9 of the Rührwerksaustragung 4.

In particular, it may be provided that the stored product is conveyed in the removal step by means of the screw conveyor 42 from the silo 1 addition.

In particular, the flexible silo 1 makes possible a method for conveying biomass into a biomass furnace from the silo 1, wherein the biomass in the silo 1 can be moved by means of the agitator discharge 4, mixed and discharged from the silo 1.

The Rührwerksaustragung 4 and the flexible silo 1 can together form a storage facility for storage of stored goods. The storage device can be provided in particular for firing a biomass firing. Biomass furnaces and

Biomass combustion plants are increasingly being used for heating buildings, in particular single or multi-family houses or commercial buildings. For the operator of the biomass combustion plant, the greatest possible use of the gross silo volume is very important in order to be able to store at least the total annual requirement quantity of heating material, ie biomass, with as small a space requirement as possible.

An advantage of the silo 1 according to the invention is that the available space can be used well, in particular at a high percentage. The advantage here is that the silo 1 can be emptied easily, evenly and inexpensively. The advantage here is that the storage facility can be built very flexible and fast.

In particular, the silo 1 can be temporarily installed. For example, if the silo 1 is used for the firing of a biomass furnace, the silo shell 3 can be folded over, rolled up and / or dismounted over the summer months, and the resulting space within the boom 2 can be used. The advantage here is that the agitator 9 is low, ie adjacent to the substrate 7, is arranged, can be easily covered and can be protected.

A further advantage is that the majority of the moving parts of the storage facility can be accessible from outside the silo 1 and when the silo 1 is filled, and can optionally be exchanged when the silo 1 is filled.

In an advantageous embodiment, it can be provided that the feed screw 42 and the agitator 9 are operatively connected by means of an angular gear 45. Thereby, the screw conveyor 42 and the agitator 9 can be driven easily and inexpensively by means of a common drive. Also hiebei the screw conveyor 42 may preferably substantially about a horizontal axis, ie by up to plus / minus 5 °, in particular 3 °, preferably 2 °, about the horizontal axis, and the agitator 9 is substantially perpendicular, ie up to plus / minus 5 °, in particular 3 °, preferably 2 °, be arranged about a vertical axis, rotatable and rotated. Likewise advantageously, the agitator 9 at the Be mounted and supported bevel gear 5 and driven by the screw conveyor 42, wherein the screw conveyor 42 siloextern, so from the outside, can be driven.

It can preferably be provided that a housing of the angular gear 45 is formed for at least partially near-ground arrangement of the agitator 9. In this case, the agitator 9 can be arranged by means of the housing near the ground and in a fixed position in the silo 1, whereby the structure and the space required for the arrangement of the agitator 9 in the silo 2 can be low.

In an advantageous development, the agitator 9 can be fastened directly to the substrate 7 by means of the housing. The load on the silo bottom 11 can be kept particularly low.

The main axis of rotation may advantageously be arranged substantially centrally symmetrical with respect to the interior of the silo 1, as shown in FIG Fig. 1 to 5 is shown. In this way, the agitator 9 near the bottom and - seen in supervision - be formed in the center of the silo bottom 11.

Advantageously, it can be provided that the at least one agitator arm 41 is designed as a spring leaf. The agitator 41 can thereby - resiliently deform - according to the resistance. Likewise, it can be provided in this context that the at least one agitator arm 42 is designed as a spring-actuated articulated arm.

As a result, the agitator arm 42 can be completely retracted and / or applied or partially or completely extended and / or deployed as a function of a weight load, which results from the fill level, in particular the degree of filling, of the silo 1, whereby the spring leaf itself deforms and wherein the spring-actuated articulated arm with at least one articulated joint and / or foldable collapsible and the deformation for extending and / or unfolding and for folding and / or retracting the spring-actuated articulated arm is spring-actuated. In the retracted and / or applied state of the Rührwerksarmes 42 of the Rührwerksarm 42 sweeps over a complete rotation, ie at least one complete revolution around the main axis of rotation of the agitator 9 only a small area, which only a little biomass is stirred by means of Rührwerksaustragung 4. In the extended and / or unfolded state of the Rührwerkarms 42 of the Rührwerksarm 42 sweeps over a complete rotation about the main axis of rotation of the agitator 9 a large area - like this in Fig. 1 to 5 is shown - and in particular can paint over the maximum possible area, which much storage material can be stirred by the agitator 9.

It is advantageous in this case that the size of the area swept over per rotation of the agitator 9 can be predeterminably designed to be weight-load-dependent. The advantage here is that the agitator 9 moves when filled silo 1 little storage, especially little stir, so the drive of the agitator 9 is little loaded, so that the drive requires little energy and thus the stored goods are not unnecessarily moved, sheared and / or crushed , The advantage here is that the agitator 9 stirred barely filled silo 1 a lot of stored goods and / or moved, which can be ensured that the stored material is contacted with the screw conveyor 42 and so the screw conveyor 42 the stored goods reliably discharged from the silo 1, ie can be promoted.

In a - not shown - further advantageous embodiment of the Rührwerksaustragung 1 can be provided that the agitator 9 by its own drive, in particular independently of the screw conveyor 42, is driven. It can be advantageously provided that the rotation of the agitator 9 Lagerfüllstandsabhängig, in particular weight-dependent, is controlled, with its own drive only turns on when a contact of the stored material with the screw conveyor 42 without the rotation of the agitator 9 can not be reliably guaranteed.

In the preferred embodiment of the agitator discharge 4, the agitator 9 may comprise two agitator arms 42, in particular opposing one another, whereby imbalances acting on the angular gear 45 may be prevented.

The agitator 9 may in a further advantageous embodiment of the Rührwerksaustragung 4 three, four or more - in particular evenly around the circumference of the agitator 9 arranged - agitator arms 42 include.

Advantageously, it may be provided that - seen in the operating position of the silo 1 - the vertical distance of a lower edge of the Rührwerkarmes 42 to the lower edge of the housing of the angular gear 45 1.1 times to 3 times, especially 1.2 times to 2.4 times, preferably the first , 3 times to 1.8 times the outer diameter of the screw conveyor 42 is. This can ensure that the agitator is at least partially adjacent to the silo bottom 11 of the silo 1, so close to the ground, is arranged, whereby the silo 1 can be emptied particularly well. In particular, the formation of oblique linings and / or sliding surfaces for slipping off the stored material can be dispensed with. In this way, a dead space in the silo 2, that is to say a part of the silo 2 which can not be used by the user for storage of the stored goods, can be low and the storage facility can be designed to be cost-saving and space-saving.

Advantageously, the Rührwerksaustragung 4 comprises a motor 6 for driving the agitator 9, wherein the first motor 6 forms the drive of the agitator 9.

In particular, the first motor 6 can also form the drive for further moving parts of the agitator discharge 4 and, in particular, can also drive the conveyor worm 42.

In particular, it can be provided that the first motor 6 is arranged outside of the silo 1 and that the first motor 6, the screw conveyor 4 and the angle gear 45 are operatively connected to each other for transmitting the torque of the first motor 6 to the agitator 9, as in Fig. 1 to 5 is shown. The first motor 6 can be cooled so easily and does not have to be protected from penetrating stored goods and / or stored product dust.

The Füllgutentnahme, in particular the fuel extraction, preferably the pellet removal from the flexible silo can be done by means of buckling or suction system. The screw conveyor 42 can hiebei be formed as part of the buckling screw. The buckling screw may extend from the angle gear 45 to the first motor 6.

The screw conveyor 42 may be arranged in regions within a conveying channel 43, as shown in FIG Fig. 1 to 5 is shown.

According to the invention, it is provided that the conveyor screw 42 is arranged within the silo conveyor channel free. It can be provided that the screw conveyor is arranged from the silo 3 inside the conveying channel 43. In this context, it can be provided that the delivery channel 43 - as in Fig. 1 to 5 shown - the screw conveyor 42 completely encloses, including the conveying channel 43 may be formed substantially as a tube.

To the motor 6, in particular directly to the conveying channel 43, may be connected to the silo 1 subsequent, suction conveyor for further promotion of discharged from the silo 1 stored goods.

In this case, the outside, ie the outside, of the silo 1 arranged parts may be formed in particular previously known. This also existing flexible silos 1 can be easily retrofitted and adapted by means of the Rührwerksaustragung 4 and adapted, whereby the net silo volume can be increased with a constant gross silo volume. The gross silo volume is the space required to set up the silo 1. The net silo volume is the usable volume of the silo 1 and is equal to the difference between the largest possible silo filling and the smallest possible silo filling with the respective stored product. The net silo volume is usually used as a space designated. The space utilization can advantageously be up to 90%, in particular between 80% and 90%.

As a result, larger individual totals of stored goods can be stored, whereby the purchase price per unit mass and / or per unit volume of the stored goods can decrease and thus the heating costs, feed costs and / or material costs can be reduced.

The advantage here is that for this purpose only conversion work on the substantially arranged in the interior of the silo 1 parts of the Rührwerksaustragung 4 and the silo 1 itself may be necessary, so that the remaining parts of the system can be used substantially without adaptation, simple and inexpensive.

The feed screw 42 is formed as a substantially cylindrical member having a central shaft and a helical screw surface with a slope for conveying the stored material in the direction of the outside of the silo 1 arranged parts of the Rührwerksaustragung 4 and usually has a length between 1m and 12m. The screw surface is radially outwardly of the outer diameter of the screw conveyor 42, which is usually between 30mm and 200mm, limited, wherein the outer diameter over the length of the screw conveyor 42 may vary substantially, in particular discontinuously vary. In particular, the feed screw 42 in the front end region, which is provided for arrangement in the silo 1, in particular in the region of the center of the silo bottom 11, the outer diameter of the screw conveyor 42 may be smaller than in the rear end region, which may be provided for arrangement in the conveying channel 43. As a result, the reliable conveyance from the stored goods in the direction of the conveying channel 43 and into the conveying channel 43 can be ensured.

Preferably - and as in Fig. 1 to 5 shown - may be arranged substantially positionally fixed a longitudinal center axis of the screw conveyor 42. In this case, the screw conveyor 42 may be fixed in position at the front end region, in particular at the angle gear 45 and at the rear end region, in particular in the region of the conveying channel 43. This allows the simple and inexpensive substantially exposed arrangement of the screw conveyor 43 in the silo 1 and - seen in the operating position of the Rührwerksaustragung 4 - a displacement of the screw conveyor 42 and in particular prevent rotation of the screw conveyor 42 and the longitudinal center axis of the screw conveyor 42 to the angle gear 45 reliably ,

Advantageously, the pitch of the screw surface may increase from the forward end portion of the auger 42 towards the rear end portion of the auger 42, which can be promoted reliably and without clogging the Rührwerksaustragung 4 even when a trituration of the stored material.

In other embodiments of the screw conveyor 42 may be formed conical or frusto-conical and so the screw conveyor 42 may have a continuous, varying outer diameter, wherein the diameter of the central shaft along the longitudinal extent of the screw conveyor 42 may be formed substantially constant or varying.

According to the invention, the screw conveyor 42 is arranged exposed in the silo 1, wherein the silo 1 is channel-free and substantially flat. Particularly advantageous has shown in the Rührwerksaustragung 4 that granular and / or hackschnitzelförmiges stored goods reliably with the exposed in the silo 1 screw conveyor 42 - like this in Fig. 1 to 5 is presented - promoted, so discharged, can be.

In the silo 1 exposed means in this context that the screw conveyor 42 is not disposed within the silo 1 within a channel, but is free in the silo 1. In this way, the silo 1 without a channel for receiving the screw conveyor 42, that is channel-free, formed, so that the dead space in the silo 1 and the cost of the silo 1 can be low. The screw conveyor 42 can rotate freely in the stored product. The advantage here is that - due to the lack of the channel in the interior of the silo 1 - too much of the screw conveyor 42 detected and / or promoted stored goods can slide sideways and / or upwards. As a result, a clogging of the conveying channel 43, in which the transfer of the biomass from the silo 1 to the parts of the Rührwerksaustragung 4 located outside the silo 1 takes place, in particular substantially self-regulating, be prevented. In this way, the control of the promotion of the speed of the discharge of the stored material from the silo 1 to a downstream device can be simple and reliable or can be self-regulating.

The advantage here is that the screw conveyor 42 does not have to be tuned to a channel, with which a standardized embodiment of the screw conveyor 42 for different geometries and different sizes of the silo 1 may be suitable. As a result, a standardized screw conveyor 42 on-site can be cut to the required length and installed. As a result, expensive individual productions of the screw conveyors 42 can be avoided, as well as the production costs and the production costs of the silo 1 can be reduced. In particular, it can be provided that the feed screw 42 can be cut to length as an on-site Standard screw conveyor is formed. The advantage here is that it can be dispensed with individual productions of screw conveyors 42 and thus the cost of production are low. It is also advantageous that the conveyor screw 42 designed as a standard screw conveyor can be delivered to the destination with a predetermined excess length and that it can be cut to length on-site. As a result, deviations of the actual silo dimensions from the planned silo dimensions can be compensated, and thus it can be prevented that a conveyor screw 42 prefabricated with a planned length can subsequently be reworked, length-corrected or replaced.

In view from above, the silo shell 3 - as in Fig. 2 shown - be formed substantially round and the silo 1 may comprise four housing supports.

In view from above, the silo shell 3 - like this Fig. 3 to 5 emerges - be substantially square, in particular rectangular, preferably square, be formed and the silo 1 may comprise four housing supports.

In other, not shown, embodiments of the silo 1 this - seen in the view from above - also be oval or polygonal, in particular triangular, hexagonal or octagonal.

Advantageously, it can be provided that the maximum area 411 which can be painted over by means of the agitator arm 41 is substantially only slightly smaller than an inner circle of the silo bottom 11. The area not covered by the stirrer 9 - at its rotation about the main axis of rotation - can be small. An advantageous direction of rotation 412 of the agitator arm 41, in particular of the two agitator arms 41, is also in Fig. 2 shown.

In an advantageous development, it can be provided that the maximum coatable surface of the agitator arm 42 can be larger than the inner circle of the silo bottom 11. In this way, it can be ensured that the agitator arm 42 can also extend into corners of the silo 1 during its movement-in particular slowly-and can also ensure the emptying of the silo 1 there. As a result, the usable volume for the user, ie the net silo volume, can be made particularly high.

In particular, for this purpose, the agitator arm 42 may be formed with a flexible free Rührwerksarmspitze, which has a particularly high deformability. It can thus be ensured that the silo shell 3 is essentially permanently touched by this agitator arm tip, whereby due to the flexibility of the flexible free agitator arm tip it can be provided that the silo shell 3 is not damaged by the agitator arm tip. This can be ensured in an advantageous embodiment of the Rührwerksarmes 42 by a combination of the spring leaf and the spring-actuated articulated arm, wherein the free Rührwerksarmspitze, which forms a free end of the Rührwerkarmes 42, instead of steel and a plastic, in particular a thermoplastic and / or an elastomer may be formed.

In an advantageous development, it can be provided that the at least one agitator arm 42 is designed to minimize friction, in particular as a sliding surface, preferably as a roller mounted so as to be pivotable essentially about the perpendicular, at its free end, in particular on the free agitator arm tip. As a result, the abrasion of the silo shell 3 with rotating agitator arm 42 can be particularly low. The advantage here is that while little friction occurs and thus the load of the agitator 9 and the drive of the agitator 9 can be low. In particular, the necessary drive power of the agitator 9 can be kept low.

The agitator 9 used may further comprise a central agitator cover 44, which in the region of the main axis of rotation and - seen in the position of use of Rührwerksaustragung 4 - can be formed above the bevel gear 45. The agitator cover 44 prevent ingress of stored goods in the angular gear 45, whereby the angle gear 45 can be formed in particular substantially maintenance-free.

Further embodiments according to the invention have only a part of the features described, wherein each feature combination, in particular also of various described embodiments, can be provided.

Claims (8)

1. A flexible silo (1), comprising a silo frame (2) and a silo housing (3), wherein the silo housing (3) is carried at least partly by the silo frame (2), and comprising an agitator discharge unit (4) for discharging stored goods in the silo (1), wherein the agitator discharge unit (4) comprises at least one agitator (9) and a screw conveyor (42), characterized in that the screw conveyor (42) is arranged between the agitator (9) and a silo floor (11), the silo floor (11) is formed in a substantially flat way and is formed at least in sections for resting on a base (7), and the screw conveyor (42) is arranged in the interior of the silo (1) without any conveying channel.
2. A flexible silo according to claim 1, characterized in that the screw conveyor (42) is arranged in an exposed manner in the direction of a substantially horizontal plane, especially substantially horizontally.
3. A flexible silo according to one of the claims 1 to 2, characterized in that the screw conveyor (42) is arranged in an exposed manner in the silo (1).
4. A flexible silo according to one of the claims 1 to 3, characterized in that the agitator discharge unit (4) is arranged adjacent to the silo floor (11), as seen in the operating position of the silo (1).
5. A flexible silo according to one of the claims 1 to 4, characterized in that the agitator discharge unit (4) comprises at least one agitator arm (41).
6. A flexible silo according to one of the claims 1 to 5, characterized in that the screw conveyor (42) is arranged from the silo housing (3) within a conveying channel (43).
7. A flexible silo according to one of the claims 1 to 6, characterized in that the silo (1) is arranged in a reinforced manner in the region in which the agitator discharge unit (4) is arranged.
8. A flexible silo according to one of the claims 1 to 7, characterized in that the silo floor (11) is formed under the usual storage loading in a dimensionally stable manner.

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