EP0177602A1 - Dispositif pour le vidage terminal d'un conteneur - Google Patents

Dispositif pour le vidage terminal d'un conteneur

Info

Publication number
EP0177602A1
EP0177602A1 EP19850902195 EP85902195A EP0177602A1 EP 0177602 A1 EP0177602 A1 EP 0177602A1 EP 19850902195 EP19850902195 EP 19850902195 EP 85902195 A EP85902195 A EP 85902195A EP 0177602 A1 EP0177602 A1 EP 0177602A1
Authority
EP
European Patent Office
Prior art keywords
membrane
container
partitions
silo
outlet opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19850902195
Other languages
German (de)
English (en)
Inventor
Lennart Forsberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0177602A1 publication Critical patent/EP0177602A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/54—Large containers characterised by means facilitating filling or emptying
    • B65D88/58—Large containers characterised by means facilitating filling or emptying by displacement of walls
    • B65D88/60—Large containers characterised by means facilitating filling or emptying by displacement of walls of internal walls
    • B65D88/62—Large containers characterised by means facilitating filling or emptying by displacement of walls of internal walls the walls being deformable

Definitions

  • the present invention relates to an apparatus for final emptying of bulk goods from a container through an opening in or in the vicinity of the bottom surface thereof.
  • containers means silos, railway goods waggons, trucks, containers, ship storage rooms etc, which contain bulk goods such as grain, cement, coal, wood chips, sand, chemicals etc.
  • the invention is not limited to the types of containers mentioned above, but all types of containers are encompassed, which may include bulk goods. Also other types of bulk goods are encompassed than those enumerated above.
  • Silos having uniform goods without any claim for first-in-first-out are instead build on a firm ground having a plane bottom with one or several outlet openings to culverts or conduits positioned therebelow or with outlet openings at the lower portion of the vertical wall.
  • the goods stored in the silo will form its own slide plane. However, due to the goods pressure from the material postioned above, said goods is compressed to the limit of petrifaction and will grow til stalagmitic statues which finally occupy a considerable portion of the storage volume of the silo and cause a considerable storage cost.
  • the container is lined with a lining disposed to rest on the adjacent inside surface of the container and the top edge of the lining is secured by a gas-tight seal in a horizontal plane about the inside perimeter of the container to form a gas-impervious pocket between the lining and the inside lower portion of the container which may be inflated.
  • a double lining can be used.
  • this patent is not directed to solve the problems associated with cylindrical containers of a substantial height, such as silos. In such an environment as a silo substantial forces arises when the membrane is inflated. It is not sufficient to anchore the membrane at the bottom of the silo since it is not easy to obtain an anchorement which is strong enough to resist the forces excerted in the holding down wires if such are used. Neither can the membrane be hold down by a line attachment to the bottom of the container, while the bottom of the container cannot withstand such high forces but ruptures. Summary of the invention.
  • the object of the present invention is to provide an apparatus for final emptying of a container which can be used in silos or other container having a great height, in which the pressure of the material is substantial.
  • a device for final emptying of a container which contains bulk goods to be fed out through one or several outlet openings or to an outlet device in or adjacent the bottom surface of the container, whereby an essentially air-tight membrane is covering the bottom surface of the container and at least a portion of the side walls but leaving the outlet opening free.
  • the membrane is double-sided and forms a closed bladder or space with one surface abutting the bottom surface of the container.
  • a device for holding down a portion of the membrane is attached close to the outlet opening.
  • Said device for holding down the membrane is triangular partitions attached between the upper and the lower part of the membrane and directed from the outlet opening.
  • the partitions are attached to the membrane by seams or welds so that the forces excerted when the space between the partitions and the membrane is inflated is completetly taken up by the membrane itself and the membrane is bulging out between the partitions both at the bottom part and at the upper part thereof.
  • the device for holding down may further comprises essentially rigid sliding planes directed towards the outlet opening and attached to the upper part of the membrane.
  • the membrane may further be provided with a device for urging the membrane to be positioned flat across the bottom of the container after the final emptying of the container when the air inside the membrane is expelled.
  • Fig. 1 is a perspective view partially in section of a cylindric silo having a side opening for emptying of the silo.
  • the silo has been emptied to the natural slide angle of the goods and uses the apparatus according to the invention;
  • Fig. 2 is a perspective view partially in section similar to Fig. 1 of a cylindric silo having a central outlet opening;
  • Fig. 3 is a cross-sectional view similar to Fig. 1 showing the operation of the invention, whereby air is supplied below the membrane so that the goods can flow out;
  • Fig. 4 is a cross-sectional view similar to Fig. 1 showing the corresponding effect in a silo having a central outlet opening;
  • Fig. 5 is a perspective view partially in cross-section of a mobile container having central bottom openings for emptying of the container;
  • Fig. 6 is a cross-sectional view of the membrane showing the connection of the slide plane to the membrane.
  • a cylindric container 10 provided with a final emptying apparatus according to the invention.
  • the container 10 can be a silo having a plane bottom and is emptied through an opening 13 in the side thereof.
  • a silo 10 having central emptying in the silo bottom 7.
  • the final emptying apparatus comprises a membrane 1, which is connected around the outlet opening 13 and covers the bottom 7 of the container 10 and extends upwards along the side walls of the container as shown in Figs. 1 and 2.
  • the membrane 1 forms a closed space 8 in the silo at the bottom thereof, in which space 8 air can be supplied through an inlet 1 1.
  • the bulk goods When the silo is emptied, the bulk goods will initially flow out through the opening 13 until the goods reaches the level shown in Figs. 1 and 2.
  • the goods form a slide plane, the angle of which is dependent on the specific properties of the goods.
  • the air is supplied at an inlet 1 1 placed immediately adjacent the top portion of the membrane.
  • the pressure of the bulk goods is lowest in this position and thus only a relatively low pressure is required in the supplied air in order to entail that the upper portion of the bulk goods is lifted somewhat and is caused to slide or flow downwards towards the opening 13. in this way it is assured that the membrane is firstly filled with air at the upper portion of the closed space adjacent the inlet 1 1, where the pressure from the bulk goods is lowest, and the most effective emptying is achieved.
  • the membrane comprises an attachment device for holding down the membrane, in the nature of vertical partitions 6, which are shown in greater details in Figs. 3 and 4.
  • Each partition 6 is triangular and extends from the inlet opening 13 and essentially radially in the direction from the opening.
  • the partitions 6 are attached to the membrane 1 by means of seams or welds 2 and are also attached by seams or welds to the lower portion of the membrane.
  • the partitions lie folded between the membrane portions.
  • Fig. 4 there is shown that the connection between the partitions 6 and the membrane can be provided with a reinforcement in the nature of a rigid strip 15.
  • This strip facilitates the formation of the correct slide plane and slide angle.
  • This strip can be a plastic strip, which is attached above the membrane 1, as is shown more closely in Fig. 6, and is provided with an outer lining 9 of any slippery or smooth material.
  • Several known materials can be used, such as TEFLON ® , so called non-friction materials, glaze, enamel, polished steel etc.
  • the strip 15 can also be an air cushion which is inflated to a higher pressure than inside the space 8.
  • Other solutions are suggested e. g. in the above-mentioned U.S. patent specification US-A-3.202.461.
  • Fig. 4 there is shown in phantom lines that the strips 15 may be held down by wires 5 which may be attached to the bottom of the silo.
  • wires 5 which may be attached to the bottom of the silo.
  • the anchoring means for these wires must be heavily reinforced which is expensive if possible at all.
  • anchoring wires completely broke the bottom of the silo in which the apparatus was installed.
  • silos having a considerable height and diameter.
  • by attaching the partitions by seams or welds to both the bottom part and the upper part of the membrane it was achieved that the force holding down the upper part of the membrane was distributed over a substantial surfaceof the bottom part of the membrane.
  • both the bottom part and the upper part of the membrane form bulges between the partitions and the forces are completely taken up by the membrane itself.
  • the membrane must be double-sided as shown in Figs. 1 to 4.
  • the slide plane is flexibly attached to the outlet opening as shown by 12 in Fig. 3 and extends so far out through the opening 13 that a mechanical element, e. g. a crank rod, impact hammer, vibrator etc 14 may be attached to this extention 12.
  • a mechanical element e. g. a crank rod, impact hammer, vibrator etc 14
  • the membrane 1 is shaped as a closed space or in the shape of a double-sided membrane in which one side of the membrane abuts the bottom of the container while the other side is inflated as clearly appears from Fig. 3. With this construction it is not necessary that the bottom of the silo is air-tight. In certain applications it may be possible to use a single-sided membrane. By the device according to the invention it is avoided that the space below the membrane 1 is inflated by an excessive amount of air and a very efficient emptying of the container is achieved.
  • Fig. 5 there is shown an application of the invention in a rectangular container.
  • the membrane is shown in its inflated position and is provided with constructed sliding planes or reinforcement strips 15.
  • the bottom of the container is air-tight and forms together with the membrane 1 said space 8.
  • the greatest advantages with the present invention is achieved with a cylindric container of a considerable height having a central outlet opening in the bottom surface, such as a silo.
  • the advantages of the present invention can also be used in other types of containers.
  • platic tubes provided with perforations along the seams 2 of the membrane 1 (not shown in the drawings).
  • the plastic tubes extend forwards to the outlet opening 13 and is connected to a source of cold air, which is blown through the plastic tubes and efficiently cools the grain.
  • the space 8 When the bulk goods have been fed out through the outlet opening 13, the space 8 is emptied through the inlet 1 1 or by the fact that a suction device is connected to the inlet 1 1. It is essential that the membrane at the emptying takes the position as shown in Figs. 1 and 2, that is with the bottom surface carefully drawn out in the corners.
  • the membrane can be provided with pockets comprising a weight, suck as a chain, heavy balls etc. When the space 8 becomes free from air, these wights will draw the membrane against the side walls of the silo to the position shown in Figs. 1 and 2.
  • the wires 16 may be used for excerting a tractive force to the upper surface of the membrane.
  • an air-tight inflatable hose attached to the lower border of the vertical portion of the membrane. If this hose is inflated before the space 8 below the membrane is completely empty, the bottom surface will easily expand due to the air-cushion effect provided by the remaining air below the membrane.
  • the membrane 1 can be manufactured of a suitable woven material, which is coated with an elstomer so that an air-tight membrane is provided.
  • the membrane can be reinforced in different ways if so required.
  • the reinforcing strip 15, if it is used, can be made of a material having a low friction, such as polyethylen or ROBALON ® .
  • the invention is specifically intended to be used at cylindrical containers, such as silos, the invention may as well be used for other types of containers, such as cargo spaces in a ship, plane store rooms/grain stores, railway wagoons, lorries, containers or pressure tanks of different types.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)

Abstract

Dispositif pour le vidage terminal d'un silo. Une membrane (1) recouvre le fond du silo et s'étend le long des parois latérales de celui-ci. La membrane est à deux faces et forme une chambre ou un espace fermé (8), dans lequel de l'air peut être amené, une surface butant contre la surface de fond du conteneur. Des séparations triangulaires (6) sont disposées entre la partie supérieure et la partie inférieure de la membrane et s'étendent à partir de l'ouverture de sortie et radialement en direction des parois latérales du silo. Lorsque l'espace (8) en dessous de la membrane est gonflé avec de l'air, les parois latérales sont étirées et poussent la surface supérieure de la membrane (1) afin de former un plan conique ayant essentiellement l'angle de glissement du matériau. Les séparations (6) sont reliées à la membrane (1) par des coutures (2). Les coutures peuvent être renforcées par des bandes (15).
EP19850902195 1984-04-12 1985-04-12 Dispositif pour le vidage terminal d'un conteneur Withdrawn EP0177602A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8402044 1984-04-12
SE8402044A SE8402044L (sv) 1984-04-12 1984-04-12 Anordning for sluttomning av en behallare

Publications (1)

Publication Number Publication Date
EP0177602A1 true EP0177602A1 (fr) 1986-04-16

Family

ID=20355553

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850902195 Withdrawn EP0177602A1 (fr) 1984-04-12 1985-04-12 Dispositif pour le vidage terminal d'un conteneur

Country Status (3)

Country Link
EP (1) EP0177602A1 (fr)
SE (1) SE8402044L (fr)
WO (1) WO1985004637A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0375986A1 (fr) * 1988-12-30 1990-07-04 Emitec Gesellschaft für Emissionstechnologie mbH Support pour un réacteur catalytique pour la purification des gaz d'échappement

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1246827A (fr) * 1985-08-30 1988-12-20 Petro-Canada Inc. Concentration de stocks par deplacement
DE4308473A1 (de) * 1993-03-17 1994-09-22 Eberhard Jost Schüttgutsilo
DE19537219A1 (de) * 1995-10-06 1997-04-10 Schenck Ag Carl Verfahren und Vorrichtung zum dosierten Austrag aus einem flexiblen Vorratsbehälter
DE19947696A1 (de) * 1998-12-07 2001-04-05 Adolf Lesk Verringern oder Auflösen von Verdichtungen
DE19856345A1 (de) * 1998-12-07 2000-06-08 Adolf Lesk Austragshilfe für nicht anbackende Schüttgüter bei Silos und Behältern
FR2815948B1 (fr) * 2000-10-27 2003-02-14 Gen Trailers France Reservoir pour un vehicule industriel et procede de vidange d'un tel reservoir
US7597525B2 (en) 2004-03-16 2009-10-06 Illinois Tool Works Inc. Tiltless bulk material cargo container liner system for use with bulk material cargo containers

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2249783A1 (de) * 1972-10-11 1974-04-25 Nolte Carl Fa Behaelter fuer schuettgueter
FR2398684A1 (fr) * 1977-07-29 1979-02-23 Lagneau Jean Dispositif de vidange des conteneurs a fond plat
GB2105310A (en) * 1981-07-31 1983-03-23 Brian Willis Emptying silos

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8504637A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0375986A1 (fr) * 1988-12-30 1990-07-04 Emitec Gesellschaft für Emissionstechnologie mbH Support pour un réacteur catalytique pour la purification des gaz d'échappement

Also Published As

Publication number Publication date
SE8402044L (sv) 1985-10-13
WO1985004637A1 (fr) 1985-10-24
SE8402044D0 (sv) 1984-04-12

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