EP0345178A1 - Vorrichtung zum vollständigen Abschaben des Kuchens, der sich bildet bei gesteuerten Zentrifugen - Google Patents

Vorrichtung zum vollständigen Abschaben des Kuchens, der sich bildet bei gesteuerten Zentrifugen Download PDF

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Publication number
EP0345178A1
EP0345178A1 EP89420192A EP89420192A EP0345178A1 EP 0345178 A1 EP0345178 A1 EP 0345178A1 EP 89420192 A EP89420192 A EP 89420192A EP 89420192 A EP89420192 A EP 89420192A EP 0345178 A1 EP0345178 A1 EP 0345178A1
Authority
EP
European Patent Office
Prior art keywords
squeegee
scraper
knife
edge
shaft
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Withdrawn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
EP89420192A
Other languages
English (en)
French (fr)
Inventor
Bernard Carbon
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 EP0345178A1 publication Critical patent/EP0345178A1/de
Withdrawn legal-status Critical Current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
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/08—Skimmers or scrapers for discharging ; Regulating thereof
    • 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
    • B04B11/08—Skimmers or scrapers for discharging ; Regulating thereof
    • B04B2011/086—Skimmers or scrapers for discharging ; Regulating thereof with a plurality of scraper blades

Definitions

  • the present invention relates to cycle centrifuges and it relates in particular to the scraping of the cake obtained in the rotor once the centrifugation operation is completed.
  • the scraping of the cake is carried out either with a scraper whose length is identical to that of the basket, or by means of a knife which is shorter than the length of the basket.
  • the scraping device is mounted on a shaft which allows its tilting so that the scraper or the knife penetrates into the cake to eliminate it ("deflate"). If we are dealing with a knife, the shaft in question is subjected to an axial movement allowing the movement of said knife over the entire length of the basket.
  • the basket is made in the form of a perforated grille internally coated with a filter cloth, so that in order not to damage these two elements, it is necessary to stop the plunge of the scraper or the knife at a suitable distance from the canvas and the grille. Under these conditions, there remains a peripheral layer of cake called a neutral layer which the usual scraping devices are unable to remove. We therefore have recourse to auxiliary members which are powerful blowers or else to other devices such as auxiliary scrapers which are not integral with the main scraper. Under these conditions, on a wringer with a horizontal axis, the material falls into the bottom of the basket, so that it is necessary to perform a subsequent operation to extract this material from the centrifuge.
  • the improvements which are the subject of the present invention aim to remedy these drawbacks and to allow the production of a complete scraper device for the cake obtained in the rotor of a centrifuge.
  • the scraper device associates the secondary scraping means with the scraper or main knife, the secondary scraping means being brought into action by an additional rotation of the scraper or main knife capable of causing only one low penetration of the latter into the neutral layer and a radial displacement of the secondary scraping means such that the latter can remove all of the neutral layer.
  • the device according to the invention comprises an oscillating blade holder secured to a tilting shaft mounted eccentric relative to the central axis of the basket, this arm being oriented towards the outside to carry a squeegee the active edge of which is further from the center of the shaft than the edge of the scraper or knife and on a radius offset in the direction of rotation of the basket with respect to that which passes through said edge of the scraper or knife, that is to say that the active edge of the squeegee is located outside the scraper or knife relative to its shaft.
  • a flexible squeegee is preferably provided, preventing any deterioration of the filter cloth and / or of the basket grille.
  • the non-liquid elements condense in the form of a "cake" 2 which adheres to the internal face of the wall 1 and is therefore in tubular form.
  • the front face of the centrifuge supports a shaft 3 mounted in suitable bearings, not shown, and which can pivot to cause the rotation of the scraper device according to the invention which has been generally referenced 4. It is observed that this device 4 is located at - above a recovery chute 5.
  • the device according to the invention firstly comprises a tubular sleeve 6 wedged angularly on the shaft 3 by means of a key 7 (fig. 1). Under these conditions, any rotary or longitudinal movement of the shaft 3 is transmitted to the sleeve 6. From the latter stands a veil 8 normal to said sleeve and the end of which carries a plate 9 oriented parallel to the sleeve, this is that is to say directed perpendicularly to the web 8.
  • the web 8-plate 9 assembly forms a blade holder.
  • On the plate 9 is fixed a blade 10 by means of appropriate screws 11.
  • the blade 10 constitutes a scraper, the end edge 10 a of which , oriented parallel to the axis of the shaft 3, is intended to remove the cake 2.
  • an arm 12 extends outwards from the plate 9 and carries a sole 13 oriented obliquely with respect to the plate 9, so that it diverges towards the outside with respect to the latter.
  • the sole 13 allows the fixing of a multitude of strips clamped against said sole by a counter plate 15 thanks to bolts 16 cooperating with the sole considered.
  • the set of blades forms a squeegee 14 whose active edge 14 a is intended for scraping the neutral layer of the cake 2.
  • the edge 14a is more distant from the center of the shaft 3 that the edge 10a of the blade 10 while it is on a radius in the offset without rotation of the basket has been illustrated by the arrow F and which corresponds clockwise, with respect to the radius which passes through the edge 10 a of the blade 10.
  • the active edge 14 a of the squeegee 14 is located outside of the blade 10 relative to the shaft 3.
  • the illustration in fig. 1 shows the cake 2 attached to the wall 1 of the basket of the centralizing machine, while the scraper device 4 is erased inside the chute 5.
  • the shaft 3 is rotated in the opposite direction to that of the basket, that is to say in the counterclockwise direction (arrows F1 of fig. 3 and 4) for the illustrated example.
  • the active edge 10 a of the blade 10 attacks the cake 2 and eliminates it little by little, the fragments falling into the chute 5.
  • the rotation of the shaft 3 takes place up to a stop, not shown , corresponding to the position of fig. 3 of the device 4.
  • This figure shows that there is a layer 2 has cake 2 between the extreme position of the edge 10a of the blade 10 and the inner face of the wall 1.
  • the edges 10a and 14a are in the vicinity of the circumference which corresponds to the internal face of the neutral layer 2 a .
  • the invention is applicable to both horizontal and vertical centrifuges.
  • a device for scraping the cake obtained in the rotor of a centrifuge was thus produced completely automatically without manual intervention, by simple eclipsing of the stop of the end of the first stroke of said device, which eclipsing can be programmed automatically.

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  • Centrifugal Separators (AREA)
EP89420192A 1988-06-01 1989-06-01 Vorrichtung zum vollständigen Abschaben des Kuchens, der sich bildet bei gesteuerten Zentrifugen Withdrawn EP0345178A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8807512 1988-06-01
FR8807512A FR2632213A1 (fr) 1988-06-01 1988-06-01 Dispositif de raclage complet du gateau obtenu dans le rotor d'une centrifugeuse a cycles

Publications (1)

Publication Number Publication Date
EP0345178A1 true EP0345178A1 (de) 1989-12-06

Family

ID=9366984

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89420192A Withdrawn EP0345178A1 (de) 1988-06-01 1989-06-01 Vorrichtung zum vollständigen Abschaben des Kuchens, der sich bildet bei gesteuerten Zentrifugen

Country Status (3)

Country Link
EP (1) EP0345178A1 (de)
JP (1) JPH0226656A (de)
FR (1) FR2632213A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6425849B1 (en) * 2001-03-27 2002-07-30 Ronald D. Benson Solid bowl centrifuge with liquid release during rotation
WO2003035267A1 (de) * 2001-10-06 2003-05-01 Guntram Krettek Nassklassiereinrichtung
CN111225728A (zh) * 2018-05-15 2020-06-02 株式会社荒井铁工所 剪切部件及过滤装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB183028A (en) * 1921-06-23 1922-07-20 Edmund Daniels Improvements in apparatus for removing accumulation of sugar or cake from the filtering walls of centrifugal machines

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB183028A (en) * 1921-06-23 1922-07-20 Edmund Daniels Improvements in apparatus for removing accumulation of sugar or cake from the filtering walls of centrifugal machines

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6425849B1 (en) * 2001-03-27 2002-07-30 Ronald D. Benson Solid bowl centrifuge with liquid release during rotation
US6740027B1 (en) * 2001-03-27 2004-05-25 Ronald D. Benson Solid bowl centrifuge with liquid release during rotation
WO2003035267A1 (de) * 2001-10-06 2003-05-01 Guntram Krettek Nassklassiereinrichtung
US7033311B2 (en) * 2001-10-06 2006-04-25 Guntram Krettek Cleaning device for drum centrifuge
CN1308089C (zh) * 2001-10-06 2007-04-04 贡特拉姆·克雷泰克 湿式分类装置
CN111225728A (zh) * 2018-05-15 2020-06-02 株式会社荒井铁工所 剪切部件及过滤装置

Also Published As

Publication number Publication date
FR2632213A1 (fr) 1989-12-08
JPH0226656A (ja) 1990-01-29

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