Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
  • B65G65/00—Loading or unloading
  • B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
  • B65G65/34—Emptying devices
  • B65G65/36—Devices for emptying from the top
  • B65G65/365—Devices for emptying from the top comprising a vertical passage located inside the container

Definitions

• the invention relates to a silo with a circular outline for bulk goods, in which a rotating mechanism for a filling device which can be fed centrally from above and a double screw conveyor which can be lifted and lowered can be arranged at the head end of a central support column, the filling device having a perpendicular telescope ⁇ like extendable filling tube is provided, the double screw conveyor is attached to a crane bridge, which can be raised and lowered, the outer end of the crane bridge is supported on a circular crane track supported on the silo wall, and the support column is equipped with ring disks and a central emptying shaft.
• the ring disks are arranged columnar at a distance, and their horizontal ring area is at least so wide that the bulk material remains on it according to its bulk cone and only falls into the emptying shaft by the action of the radially inward-transporting twin-screw conveyor.
• bulk material such as coal, lime, gypsum and the like.
• the bulk goods delivered mostly in wagons frequently change in quality (grain structure, moisture, chemical composition, etc.) from load to load, so that stratification of bulk material of different quality occurs in the silo ⁇ stands.
• the invention has for its object to design a silo of the generic type such that layered material of different quality is discharged as a largely homogenized mixture during emptying.
• twin-screw conveyor is mounted with its inner end on a lifting frame guided by the supporting column and attached to the slewing gear so that it can be pivoted about a horizontal axis and with its outer end is attached to a lifting gear attached to the crane bridge.
• the twin-screw conveyor can be arranged obliquely with respect to its horizontal position, so that the outer end is either higher or lower than the inner end.
• a funnel-shaped transverse distribution and stratification take place in the raised position and a conical cross-distribution in the lowered position.
• the twin-screw conveyor is brought into an opposite swivel position so that it cuts several layers and mixes them during the emptying process. If, for example, a funnel-shaped layering has taken place when filling with the raised twin-screw conveyor, the removal takes place with the lowered position of the twin-screw conveyor and a conical broaching profile.
• the setting of the twin-screw conveyor in different swivel positions permits adaptation to different conveying capacities when filling or emptying.
• a high conveying capacity is often required. wishes.
• the double screw conveyor is in a lowered position, the gradient of the conical bulk material profile is used,. so that the " twin-screw conveyor can be equipped with a correspondingly weaker drive motor.
• the lowered position of the double-screw conveyor is also suitable for emptying the silo. With a lower delivery rate.
• a favorable constructive solution provides that the double screw conveyor is fastened under a swivel arm which is articulated in a pivotable manner on the mast and is attached to the crane bridge so that it can be raised and lowered.
• the inclination of the twin-screw conveyor can be set as a function of the properties of the bulk material, in particular its bulk cone.
• the twin-screw conveyor can preferably be pivoted upwards and downwards from its horizontal position up to approximately 45 °.
• Figure 1 is a silo in a vertical section.
• Fig. 2 shows the subject of Fig. 1 in a cross section along line I - I and
• Fig. 3 shows the upper part of another embodiment in a vertical section.
• FIGS. 1 and 2 shows a large silo, the diameter of which is generally 8 m and more and the height of which is 10 m and more.
• the silo 1 has a circular floor plan through a cylindrical wall.
• A is assigned Soil 2 and a roof 3.
• Large silos of this type are increasingly being used where, on the one hand, an offset by wind effects is to be prevented for the purpose of environmental protection and on the other hand protection of the container contents is required.
• a support column 4 is arranged in the vertical central axis, the structure of which is explained in more detail below.
• a rotating mechanism 5 above which an inlet pipe 6 for the bulk material is attached.
• a screw conveyor 7 is provided, at the outlet opening of which a downwardly telescopically extendable filling tube 8 is attached.
• a crane bridge 9 is also attached to the slewing gear 5, which extends radially to one side up to approximately the container wall and is supported there on a crane runway 11 which is fastened on an annular bracket 10.
• An annular lifting frame 12 is attached under the rotating mechanism 5 and lies around the supporting column 4 and is mounted on vertical guide tubes 25.
• This mast 12 is attached to the slewing gear 5 with several hoisting ropes 13.
• the lower end of the telescopic filler tube 8 is attached to this mast 12.
• a pivot arm 14 is mounted about a horizontal axis 15. This is suspended at its outer end by means of a hoist rope 17 on a hoist 16 which is mounted on the crane bridge 9. With the help of the lifting mechanism 16, the swivel arm 14 can be lowered or raised in relation to the horizontal position. Under the swivel arm 14 is a 'double screw conveyor 18 is attached, which is provided with two screws' 19,20. These screws can either be " individually driven, or together in the opposite sense.
• the support column 4 is constructed from stacked ring disks 21. These are arranged one above the other at a distance. The disc holes, which are aligned in the vertical direction, form an emptying shaft 22.
• the radial width of the ring surfaces is dimensioned such that the bulk material remains on it according to its cone of bulk and does not fall into the emptying shaft 22 until the bulk material has been transported through the radially inward direction Double screw conveyor 18 is pushed through.
• a screw conveyor 24 serving for emptying is arranged under the emptying shaft 22.
• the silo 1 shows, for example, how the silo 1 is filled with the aid of a lowered double-screw conveyor 18.
• the bulk material passes through the inlet pipe 6 into the screw conveyor 7 and from there falls through the filling pipe 8 onto the surface of the bulk material in the container.
• the double screw conveyor 18 is driven so that the material is distributed radially outwards.
• the slewing gear 5 rotates and takes the crane bridge 9 and the over-screw conveyor 18 located underneath with it. After each full revolution, the mast 12 and the swivel arm 14 are raised by one layer.
• a stratification is created which is indicated schematically by the filling layers 23.
• a layered filling content is built up in this way, which is mounted conically to the vertical central axis.
• the twin-screw conveyor 18 For emptying, the twin-screw conveyor 18 is pivoted upward, so that it receives the position shown at 18 'in which its longitudinal axis intersects the filling layers 23.
• the twin screw conveyor is used for emptying whose 18 or 18 'driven in the opposite direction, so that the material is transported radially inwards, is pressed between the washers 21 and falls into the discharge shaft 22.
• This emptying method is particularly suitable for bulk goods that easily get stuck in the silo. In connection with the washers 21 and the emptying shaft 22, removal takes place from above.
• the possibility of giving the twin-screw conveyor 18 different inclinations for filling and emptying makes it possible to achieve a favorable mixing of the material during emptying.
• FIG. 3 essentially corresponds to the embodiment described above. 1, the crane bridge 9 is slightly inclined downwards in the radial direction, the crane bridge 9 'according to FIG. 3 is directed slightly upwards. This allows the swivel range for the swivel arm 14 and the double screw conveyor
• the twin-screw conveyor 18 can be expanded upwards.
• the roof 3 ' is accordingly designed as a sunroof.
• the lowered position of the twin-screw conveyor 18 is indicated by the dashed line 18 '.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
• Vertical, Hearth, Or Arc Furnaces (AREA)
• Crystals, And After-Treatments Of Crystals (AREA)
• Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6238616

Family Applications (1)

Country Status (7)

Families Citing this family (11)

Family Cites Families (5)

• 1984
  • 1984-06-18 DE DE19843422569 patent/DE3422569A1/de active Granted
• 1985
  • 1985-06-14 AU AU46049/85A patent/AU4604985A/en not_active Abandoned
  • 1985-06-14 JP JP60503030A patent/JPS61502460A/ja active Pending
  • 1985-06-14 EP EP85903244A patent/EP0185745A1/de not_active Withdrawn
  • 1985-06-14 WO PCT/EP1985/000283 patent/WO1986000281A1/de not_active Application Discontinuation
  • 1985-12-30 NO NO855333A patent/NO855333L/no unknown
• 1986
  • 1986-02-11 DK DK66486A patent/DK66486A/da not_active Application Discontinuation

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events