EP0409904B1 - Appareil dechargeur - Google Patents

Appareil dechargeur Download PDF

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Publication number
EP0409904B1
EP0409904B1 EP19890906122 EP89906122A EP0409904B1 EP 0409904 B1 EP0409904 B1 EP 0409904B1 EP 19890906122 EP19890906122 EP 19890906122 EP 89906122 A EP89906122 A EP 89906122A EP 0409904 B1 EP0409904 B1 EP 0409904B1
Authority
EP
European Patent Office
Prior art keywords
container
gas
elements
outlet
conduit
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.)
Expired - Lifetime
Application number
EP19890906122
Other languages
German (de)
English (en)
Other versions
EP0409904A1 (fr
Inventor
Jan-Peter BJÖRKLUND
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.)
Partek Oy AB
Raute Dry Mix Oy
Original Assignee
Partek Oy AB
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 Partek Oy AB filed Critical Partek Oy AB
Priority to AT89906122T priority Critical patent/ATE97380T1/de
Publication of EP0409904A1 publication Critical patent/EP0409904A1/fr
Application granted granted Critical
Publication of EP0409904B1 publication Critical patent/EP0409904B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65D88/72—Fluidising devices

Definitions

  • the present invention relates to a discharge apparatus for a funnel-shaped container with an outlet at its narrow end, having a number of elements made of a gas-permeable material provided within the container on its wall so as to extend towards the outlet of the container in such a manner that a channel sealed along the edges of the elements is defined between each particular element and the wall of the container, the channel being divided into separate sections by means of transverse partition walls, and gas supply conduits being provided for these sections.
  • Bridging is a frequently occurring problem in the discharge of various materials from the lower end of funnel-shaped containers, which often form the lower end of a silo but can be open at the top as well.
  • the bridging causes the discharge to be interrupted more or less temporarily.
  • DE-A-1506977 discloses discharge apparatus which comprises a container with inclined side walls and an opening in its base. Porous elements are provided in the side walls. Air is supplied to the porous elements at a pressure selected according to the distribution of material in the container, to ensure that the distribution remains even.
  • the object of the invention is to provide an inexpensive discharge apparatus for powders, which allows a controllable and uninterrupted even discharge to be achieved, even with powders which are extremely liable to bridging.
  • the present invention provides an apparatus according to the introduction, in which apparatus each gas supply conduit is provided with a throttle provided by an apertured plate selected according to the material to be discharged from the container, the plate being capable of being removed from the conduit.
  • the elements made of a gas-permeable material are preferably arranged to extend at least substantially from the outlet of the funnel-shaped container up to the inlet end of the container.
  • gas is supplied to all the channel sections from a common source.
  • the gas supply conduits provided for each channel section is throttled by means of a throttle plate the throttle opening of which is chosen so as to suit the properties of the active dry powder.
  • the gas-permeable elements are preferably made of a weldable sheet metal available on the market under the name DYNAPORE®, whereby the pores in the sheet metal are preferably directed obliquely downward and towards the outlet of the funnel-shaped container.
  • Other materials for so called fluidised conveying can be used as well.
  • the throttled supply of gas into the separate channel sections between the wall of the container and the elements of gas-permeable material provides an uninterrupted even discharge of material, also when the material level in the funnel-shaped container is descending, right down to the outlet opening.
  • Figure 1 is a longitudinal sectional view of a funnel-shaped container with the apparatus according to the invention, the container forming a bottom at the lower end of a silo.
  • Figure 2 is a cross-sectional view through the upper end of the funnel-shaped silo bottom.
  • Figure 3 is an enlarged partial sectional view of the wall of the silo bottom at an element made of a material permeable to gas.
  • Figure 4 is an enlarged longitudinal sectional view of a gas supply conduit provided with a throttle.
  • Figure 5 is an enlarged partial longitudinal sectional view of the wall of the silo bottom and an element of gas-permeable material.
  • a funnel-shaped, preferably conical container forming the bottom at the lower end of a silo is designated generally by the reference numeral 1; the silo is designated by 17.
  • the conical wall of the container 1 is designated by 2.
  • An outlet 3 is provided at the lower end of the bottom part 1.
  • a conventional pivotable valve plate (not shown in the drawing) can be provided in the outlet 3.
  • a number of elements 4 is mounted on the inside of the wall 2.
  • the elements are made of a gas-permeable material, preferable of a sheet metal available on the market under the name DYNAPORE®, consisting of a porous metal sheet about 3 mm in thickness and welded up of a close-meshed metal network. Pores 7 in the sheet, Figure 5, are preferably directed obliquely downward towards the outlet 3 of the funnel.
  • the edges of the sheet elements 4 are welded to the wall 2, so that a channel 5 is defined between each sheet element 4 and the wall 2.
  • Two such edge welds 6 are visible in Figure 3; in Figures 1 and 2, these welds are shown by means of dashes.
  • the elements 4 extend from the upper end of the bottom part 1, which can be open at the top as well, down to the outlet 3.
  • the channels 5 are divided into separate sections 9 by means of transverse partition walls 8. The sections are positioned one after another from the top towards the outlet 3.
  • a separate gas supply conduit 10 is provided for each channel section 9, the gas being mostly air or nitrogen, for instance.
  • Each supply conduit 10 comprises a throttle 11.
  • the throttle 11 can be formed by means of a throttle plate with a constant throttle opening suited for the properties of the material.
  • 12 designates a rubber hose and 13 a hose clamp. The throttle plate is replaced whenever required.
  • the supply of gas is preferably carried out from a common source the outlet conduit of which is designated with 14. 15 designates the extension of the conduit 14 along the wall of the bottom part 1, and 16 designates annular distribution conduits extending around the bottom part 1 up to each particular channel section 9.
  • Gas trickling out through the elements 4 activates the material in the bottom part 1 so that an uninterrupted even flow is obtained through the outlet 3.
  • the channels 5 are divided into the separate transverse sections 9 and the supply of gas into each section 9 is throttled, the discharge of the material takes place evenly even when the material level in the bottom part 1 is descending.
  • the throttles 11 prevent the gas from "escaping" through the uncovered element portions.
  • the combination of the throttled supply of gas and the provision of the separate channel sections also keeps the consumption of gas at a low level, which is an advantage not only economically but also for the reason that high consumption of gas involves filtering problems with the excess gas to avoid formation of dust.

Landscapes

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

Abstract

La présente invention se rapporte à un appareil déchargeur pour un récipient en forme d'entonnoir (1) comportant un orifice de sortie (3) au niveau de son extrémité étroite. La présente invention a pour but d'assurer un déchargement régulier d'un matériau pulvérulent particulièrement exposé au risque de formation de pont, jusqu'à ce que le récipient soit vide, ce qu'on obtient en disposant, sur la face interne de la paroi (2) du récipient, des éléments (4) en matériau perméable au gaz et s'étendant en direction de l'orifice de sortie (3), chaque canal défini entre les éléments (4) et la paroi (2) du récipient étant divisé en sections transversales séparées (9) pourvues chacune d'une admission de gaz réduite. Le gaz pénétrant par les éléments active le matériau pulvérulent assurant ainsi un écoulement sortant régulier. Grâce à l'admission de gaz réduite, l'écoulement régulier est continu jusqu'à ce que le récipient (1) soit vide.

Claims (3)

  1. Appareil de déchargement pour un récipient en forme d'entonnoir présentant une sortie à son extrémité étroite, équipé d'un certain nombre d'éléments (4) faits d'une matière perméable aux gaz prévus dans le récipient (1) sur sa paroi (2) de manière à s'étendre vers la sortie (3) du récipient de manière qu'un canal (5) fermé le long des bords des éléments soit défini entre chaque élément particulier (4) et la paroi (2) du récipient (1), le canal (5) étant divisé en sections séparées (9) au moyen de cloisons transversales (8), et des conduits d'alimentation en gaz (10) étant prévus pour ces sections, caractérisé en ce que chaque conduit (10) d'alimentation en gaz est muni d'un étranglement (11) formé par une plaque perforée sélectionnée en fonction d'une matière qu'il s'agit de décharger du récipient, la plaque pouvant être retirée du conduit,
  2. Appareil de déchargement selon la revendication 1, dans lequel une fente est formée dans le conduit (10) pour recevoir la plaque perforée (11), l'appareil comprenant un élément d'étanchéité (12, 13) qui doit être positionné autour de la fente et des parties adjacentes du conduit (10).
  3. Appareil de déchargement selon la revendication 2, dans lequel l'élément d'étanchéité (12, 13) est en forme de manchon.
EP19890906122 1988-05-25 1989-05-24 Appareil dechargeur Expired - Lifetime EP0409904B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89906122T ATE97380T1 (de) 1988-05-25 1989-05-24 Entladungsgeraet.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI882470A FI80430C (sv) 1988-05-25 1988-05-25 Utmatningsanordning
FI882470 1988-05-25

Publications (2)

Publication Number Publication Date
EP0409904A1 EP0409904A1 (fr) 1991-01-30
EP0409904B1 true EP0409904B1 (fr) 1993-11-18

Family

ID=8526517

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890906122 Expired - Lifetime EP0409904B1 (fr) 1988-05-25 1989-05-24 Appareil dechargeur

Country Status (6)

Country Link
EP (1) EP0409904B1 (fr)
JP (1) JP2801940B2 (fr)
DE (1) DE68910819T2 (fr)
DK (1) DK171178B1 (fr)
FI (1) FI80430C (fr)
WO (1) WO1989011378A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007077294A1 (fr) * 2005-12-30 2007-07-12 Lahti Precision Oy Clapet de dosage

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI96297C (fi) * 1993-06-24 1996-06-10 Raute Precision Oy Laitteisto jauhemaisen aineen annostukseen säiliöstä
FI115518B (fi) 2002-06-12 2005-05-31 Raute Prec Oy Jauhemaisen aineen valutuslaite
DE102008014475A1 (de) 2008-03-17 2009-11-12 Uhde Gmbh Verfahren und Vorrichtung zur dosierten Entnahme eines fein- bis grobkörnigen Feststoffes oder Feststoffgemisches aus einem Vorratsbehälter
DE102008024576B3 (de) * 2008-05-21 2009-10-01 Uhde Gmbh Vorrichtung zum Austragen eines Feststoffes aus einem Behälter
DE102010018841A1 (de) 2010-04-29 2011-11-03 Uhde Gmbh Austragskonus
US10228077B2 (en) 2017-03-15 2019-03-12 The Young Industries, Inc. Fluidizing butterfly valve, and system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2723054A (en) 1951-10-04 1955-11-08 Nat Lead Co Feeders
DE1506977B2 (de) 1967-06-20 1973-11-22 Fa. Johannes Moeller, 2000 Hamburg Verfahren und Vorrichtung zur Auflocke, rung des in einem Silo gelagerten feinkorni gen Gutes
US3645583A (en) * 1970-04-09 1972-02-29 Calvin P Heath Apparatus and method for handling finely divided solids
US3713564A (en) * 1971-06-25 1973-01-30 Butler Manufacturing Co Method and means for facilitating the flow of granular materials
JPS5628815A (en) * 1979-08-16 1981-03-23 Toshiba Corp Method of forming photodiffusion-roughened surface
SE452875B (sv) * 1984-04-26 1987-12-21 Hans E Eriksson Anordning vid behallare med pneumatisk panelaktivator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007077294A1 (fr) * 2005-12-30 2007-07-12 Lahti Precision Oy Clapet de dosage

Also Published As

Publication number Publication date
DK171178B1 (da) 1996-07-15
DE68910819D1 (de) 1993-12-23
EP0409904A1 (fr) 1991-01-30
FI882470A (fi) 1989-11-26
JP2801940B2 (ja) 1998-09-21
WO1989011378A1 (fr) 1989-11-30
FI882470A0 (fi) 1988-05-25
JPH03504483A (ja) 1991-10-03
DK266290A (da) 1990-11-06
DK266290D0 (da) 1990-11-06
FI80430B (fi) 1990-02-28
FI80430C (sv) 1990-06-11
DE68910819T2 (de) 1994-03-17

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