EP0321365A2 - Dekantierzentrifuge mit einziehbarer Zuführvorrichtung - Google Patents

Dekantierzentrifuge mit einziehbarer Zuführvorrichtung Download PDF

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Publication number
EP0321365A2
EP0321365A2 EP88420415A EP88420415A EP0321365A2 EP 0321365 A2 EP0321365 A2 EP 0321365A2 EP 88420415 A EP88420415 A EP 88420415A EP 88420415 A EP88420415 A EP 88420415A EP 0321365 A2 EP0321365 A2 EP 0321365A2
Authority
EP
European Patent Office
Prior art keywords
spout
plug
bowl
extraction
integral
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.)
Granted
Application number
EP88420415A
Other languages
English (en)
French (fr)
Other versions
EP0321365B1 (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 does not in fact satisfy either of the two imperatives.
  • the present invention proposes to solve the problem by eliminating outright the protective metal bellows usually associated with the spout.
  • the retractable spout is mounted to slide axially in a sleeve carried inside the fixed confinement envelope by a vertical wall secured to the removable plug traversed by the drive shaft of the bowl, the displacement of this spout in one direction or 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 for the purpose of pouring into the bowl of the loaded liquid to be treated, or to release said end of this outlet in order to allow the extraction of the aforementioned plug and of the rotating assembly of the machine.
  • connection of the pouring spout and the end of the supply pipe is thus produced inside the fixed casing, thereby dispensing with any deformable protective bellows.
  • the end of the pipe 10 is engaged the end, advantageously provided swollen to recover any accidental overflow, of a sliding pouring spout, here referenced 19 and assumed to be established with a bent profile in order to penetrate through 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 wedged 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 external flange 19 b of the spout 19 and an internal 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 the event of untimely blockage.

Landscapes

  • Centrifugal Separators (AREA)
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 true EP0321365A2 (de) 1989-06-21
EP0321365A3 EP0321365A3 (en) 1990-03-07
EP0321365B1 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
EP0321365B1 (de) 1992-02-26
FR2624764A1 (fr) 1989-06-23
FR2624764B1 (fr) 1990-05-18
JPH01297160A (ja) 1989-11-30
US4869713A (en) 1989-09-26
EP0321365A3 (en) 1990-03-07

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