EP0321365B1 - Dekantierzentrifuge mit einziehbarer Zuführvorrichtung - Google Patents

Dekantierzentrifuge mit einziehbarer Zuführvorrichtung Download PDF

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Publication number
EP0321365B1
EP0321365B1 EP88420415A EP88420415A EP0321365B1 EP 0321365 B1 EP0321365 B1 EP 0321365B1 EP 88420415 A EP88420415 A EP 88420415A EP 88420415 A EP88420415 A EP 88420415A EP 0321365 B1 EP0321365 B1 EP 0321365B1
Authority
EP
European Patent Office
Prior art keywords
spout
plug
immovable
integral
bowl
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
EP88420415A
Other languages
English (en)
French (fr)
Other versions
EP0321365A2 (de
EP0321365A3 (en
Inventor
Jean-Pierre Davier
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.)
Robatel SLPI SA
Original Assignee
Robatel SLPI SA
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 Robatel SLPI SA filed Critical Robatel SLPI SA
Publication of EP0321365A2 publication Critical patent/EP0321365A2/de
Publication of EP0321365A3 publication Critical patent/EP0321365A3/fr
Application granted granted Critical
Publication of EP0321365B1 publication Critical patent/EP0321365B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/04—Periodical feeding or discharging; Control arrangements therefor

Definitions

  • the present invention relates to centrifugal decanters and it relates more particularly (because it is in this case that its application seems to be of most interest), but not exclusively, centrifugal machines of the pendulum type intended for the reprocessing of radioactive materials .
  • such a machine generally comprises a lower bowl 1 which is disposed inside a fixed confinement envelope 2 and which is integral with the base of a vertical shaft 3 driven in rotation by a motor 4 with the interposition of a ball joint system 5 which allows the assembly to orient itself freely under the effect of the imbalances caused by the high speed rotation of the bowl 1.
  • the shaft 3 crosses the slab or protective screen 6 which supports the fixed casing 2, through a removable plug 7 which is itself secured to an internal tank 8 intended when feeding the rotating bowl 1.
  • the discharge of the liquid loaded into the tank 8 is effected by means of a pouring spout 9 mounted telescopically sliding on the end of the supply pipe 10.
  • the axial displacement of the spout 9 under the effect of a control mechanism 11 supported either by the slab 6 or by a removable plug 12 engaged in a vertical housing thereof, makes it possible in one direction to bring the free end of the spout 9 above the interior space of the tank 8 avoiding any risk of untimely flow of the liquid loaded in the lower part of the casing 2 at the level of which the purified liquid is collected and discharged (tubing referenced 13), while the sliding of this spout 9 in the opposite direction authorizes the withdrawal of the container 8 upwards with the assembly supported by the removable plug 7.
  • a deformable metal bellows 14 is ordinarily used which ensures the confinement of the abovementioned connection without interfering with the axial sliding of the spout 9.
  • this bellows 14 poses problems which are difficult to solve. If its thickness is too small, its damage by mechanical shock or by corrosion can occur very quickly, thereby generating the leaks that it was desired to avoid, while if this thickness is intended to be large enough to overcome the aforementioned drawback, the operation of the control mechanism 11 associated with the spout 9 becomes difficult and gives rise to risks of errors in positioning the spout or to damage. We are therefore naturally led to adopt a compromise which in fact satisfies neither of the two imperatives.
  • the present invention proposes to solve the problem by eliminating outright the protective metal bellows usually associated with the spout.
  • a centrifugal decanter according to the invention is characterized by the elements of the characterizing part of claim 1.
  • the retractable spout is mounted with axial sliding in a sleeve carried inside the fixed confinement envelope by a vertical wall integral with the removable plug traversed by the drive shaft of the bowl, the displacement of this spout in one direction or in the other under the action of its control mechanism suspended from said plug having the effect of either engaging its upstream end on the outlet of the supply pipe in the fixed casing with a view to pouring into the bowl of the liquid responsible for processing, or to clear said end of this outlet to allow the extraction of the aforementioned plug and the rotating assembly of the machine.
  • fig. 1 schematically illustrates the general arrangement of a decanter of the conventional type.
  • Fig. 2 similarly shows the arrangement of a decanter established in accordance with the invention.
  • Fig. 3 and 4 are axial sections on a larger scale representing the spout retractable to the two positions of use.
  • the end of the pipe 10 is engaged with the end, advantageously swollen to recover any accidental overflow, of a sliding pouring spout, here referenced 19 and assumed to have an angled profile in order to penetrate its downstream end into the flared top of the vertical tube 8 a of the internal tank 8.
  • This spout 19 is guided axially inside an oblique sleeve 20 made integral with the side wall 8 b of the tank 8, and it is also integral with two fins vertical 19 a which are turned upwards to form bearings for an eccentric 21; the latter is fixed on the base of the rotating operating shaft 22 of the control mechanism as in fig. 2 it was assumed, as in the prior art, to be carried by an independent stopper 12, it being however observed that in the case of FIG. 2 this plug 12 is housed, no longer in the slab 6 as in fig. 1, but in the removable cap 7.
  • the berser spout 19 with an elastic return system in the released position according to FIG. 4.
  • This system can in particular comprise a spring 23 interposed between an outer flange 19 b of the spout 19 and an inner flange 20 a of the sleeve 20.
  • the invention is capable of being applied to centrifugal decanters in which the internal feed tank 8 is replaced by a box forming a core to limit the volume of liquid liable to accumulate in the envelope. 2 in case of untimely blockage.

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  • Centrifugal Separators (AREA)

Claims (4)

1. Dekantierzentrifuge, insbesondere vom hängenden Typ zur Entnahme von radioaktivem Material, in der der Drehbehälter (1) mit seiner Vorrichtung zum Drehantrieb (3-4) durch einen Deckel (7) gehalten ist, der abnehmbar in den Schutzdeckel (6) eingebaut ist, der die den Drehbehälter (1) abschließende Außenhülle (2) trägt, wobei die Versorgung des Drehbehälters (1) mit zu behandelnder belasteter Flüssigkeit mittels einer Ausgießtülle (19) erreicht wird und wobei die Verschiebung dieser Ausgießtülle (19) in der einen oder anderen Richtung unter Einwirken eines am Dekkel (7) hängenden Steuermechanismus (21-22) zur Folge hat, daß entweder ihr oberes Ende mit dem Abfluß einer Versorpungsleitung (10) in der Außenhülle (2) verbunden wird, um das Ausfließen der belasteten Flüssigkeit in den Behälter zu ermöglichen, oder daß dieses Ende von diesem Abfluß getrennt wird, um das Herausziehen des abnehmbaren Deckels (7) und des drehbaren Aufbaus zu ermöglichen, dadurch gekennzeichnet, daß die Ausgießtülle (19) axial gleitend in einer Manschette (20) montiert, die im Inneren der festen Außenhülle (2) durch eine senkrechte Wand (8b) gehalten ist, die mit dem abnehmbaren Deckel (7) fest verbunden ist, und durch den Steuerungsmechanismus (21-22) einziehbar ausgestaltet ist.
2. Dekantierzentrifuge nach Anspruch 1, dadurch gekennzeichnet, daß der Mechanismus zur Steuerung der Ausgießtülle (19) eine drehbare Betätigungswelle (22) aufweist, auf der ein Exzenter (21) festgekeilt ist, dessen Umfang an zwei mit der Ausgießtülle (19) fest verbundenen Stege (19a) anliegt.
3. Dekantierzentrifuge nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß auf des Ausgießtülle (19) elastische Mittel (23) angeordnet sind, die die Ausgießtülle dauerhaft in die nicht im Eingriff stehende und das Herausziehen des abnehmbaren Deckels (7) ermöglichende Position zurückbringen können.
4. Dekantierzentrifuge nach Anspruch 3, dadurch gekennzeichnet, daß die elastischen Mittel von einer Feder (23) gebildet sind, die zwischen zwei Flanschen (19b und 20a) gehalten ist, die fest mit der Ausgießtülle (19) bzw. mit der Manschette (20) verbunden sind.
EP88420415A 1987-12-16 1988-12-12 Dekantierzentrifuge mit einziehbarer Zuführvorrichtung Expired - Lifetime EP0321365B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8717860A FR2624764B1 (fr) 1987-12-16 1987-12-16 Decanteuse centrifuge a bec d'alimentation retractable
FR8717860 1987-12-16

Publications (3)

Publication Number Publication Date
EP0321365A2 EP0321365A2 (de) 1989-06-21
EP0321365A3 EP0321365A3 (en) 1990-03-07
EP0321365B1 true EP0321365B1 (de) 1992-02-26

Family

ID=9358118

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88420415A Expired - Lifetime EP0321365B1 (de) 1987-12-16 1988-12-12 Dekantierzentrifuge mit einziehbarer Zuführvorrichtung

Country Status (5)

Country Link
US (1) US4869713A (de)
EP (1) EP0321365B1 (de)
JP (1) JPH01297160A (de)
DE (1) DE3868607D1 (de)
FR (1) FR2624764B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2706216B1 (fr) * 1993-06-07 1995-07-21 Robatel Slpi Décanteuse continue pour le traitement des produits nucléaires.
US11318480B2 (en) * 2019-03-04 2022-05-03 Kennametal Inc. Centrifuge feed pipes and associated apparatus

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1927822A (en) * 1926-02-16 1933-09-26 Merco Centrifugal Separator Co Centrifuge apparatus
US3073516A (en) * 1959-08-06 1963-01-15 Dorr Oliver Inc Centrifuges
US3893907A (en) * 1973-09-10 1975-07-08 Exxon Research Engineering Co Method and apparatus for the treatment of tar sand froth
JPS5365587A (en) * 1976-11-24 1978-06-12 Fujitsu Ltd Reciprocal motion driving device
FR2560071B1 (fr) * 1978-12-19 1987-01-16 Commissariat Energie Atomique Centrifugeuse pendulaire de decantation
JPS5845759A (ja) * 1981-09-11 1983-03-17 Toshiba Corp 遠心清澄機
US4406651A (en) * 1982-04-15 1983-09-27 Donaldson Company, Inc. Multi-phase self purging centrifuge
GB8517762D0 (en) * 1985-07-15 1985-08-21 British Nuclear Fuels Plc Centrifuges

Also Published As

Publication number Publication date
DE3868607D1 (de) 1992-04-02
FR2624764A1 (fr) 1989-06-23
FR2624764B1 (fr) 1990-05-18
JPH01297160A (ja) 1989-11-30
EP0321365A2 (de) 1989-06-21
US4869713A (en) 1989-09-26
EP0321365A3 (en) 1990-03-07

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