US3056505A - Centrifuges - Google Patents

Centrifuges Download PDF

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Publication number
US3056505A
US3056505A US847541A US84754159A US3056505A US 3056505 A US3056505 A US 3056505A US 847541 A US847541 A US 847541A US 84754159 A US84754159 A US 84754159A US 3056505 A US3056505 A US 3056505A
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United States
Prior art keywords
sleeve
diaphragm
spindle
drum
valve
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Expired - Lifetime
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US847541A
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English (en)
Inventor
Andersson Nils Vilhelm
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Landsverk AB
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Landsverk AB
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Publication date
Application filed by Landsverk AB filed Critical Landsverk AB
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    • 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
    • B04B11/05—Base discharge

Definitions

  • the present invention relates generally to discontinuously operating centrifuges and particularly relates to a cut-off valve for a central outlet opening at the bottom of the centrifugal drum, through which the material, such as sugar crystals, subjected to centrifugal treatment may be discharged from the centrifugal drum. Valves for opening and closing the discharge opening of a cen trifuge are known.
  • the material subjected to the treatment may be scraped off by means of an excavator of known type, and allowed to fall down through the outlet opening in the bottom of the drum, so that another charge of the material may be treated.
  • an excavator of known type
  • the material forms vaults from the covering tunnel to the inner surface of the drum or to the material remaining in the drum, so that the material cannot be scraped off by means of the excavator and be removed through the bottom openings.
  • the cut-off valve member comprising a deformable, preferably flexible and elastic body, that is a diaphragm, which is secured to a sleeve and adapted axially displaceable on the drum driving spindle to be deformed by the displacement of thesleeve along the spindle of the drum in a manner such as to cover the bottom opening in its entirety, when the sleeve assumes its lower position.
  • the valve body has so small a diameter that the material may pass between the valve body and the inner surface of the drum or the material remaining in the drum without building any vaults.
  • a sprayer screen is arranged on the sleeve above the diaphragm'
  • the screen is adapted, in the filling of the drum with material, to throw a portion at least of the filling mass directly out against the inner surface of the drum, Without the filling material first touching the diaphragm.
  • FIG. 1 is a vertical view of a centrifuge partly in section provided with a valve according to the invention
  • FIG. 2 is a fragmentary view on an enlarged scale of a vertical view of the valve of the invention.
  • FIG. 3, is a plan view of the valve
  • FIG. 4 is a fragmentary section through a portion of the diaphragm and its supporting plates in an expanded position of the diaphragm;
  • FIG. 5 is a fragmentary section of the diaphragm, illustrating its folded position
  • FIG. 6 is an axial section through a modified construction of the diaphragm.
  • the cylindrical surface of the drum is perforated and provided on the inside thereof with a strainer cloth 6. It is covered by a cover 7 underneath of which an excavator-not shown in the drawing-is arranged for digging out the material gathered on a strainer drum in the form of a cylinder 8.
  • At the bottom 9 of the bowl 1 are provided central outlet openings 10, through which the excavated material may fall downwardly and be discharged from the bowl.
  • openings are adapted to be closed by means of a cut-off valve in the form of a diaphragm 14, which is carried by a sleeve 11 rotatable with the driving spindle 2.
  • the sleeve is provided at the top with a flange 12 and at the bottom with a cone 13 secured to the sleeve 11 and in which the diaphragm 14 is inserted.
  • the sleeve 11 is axially slidable on the spindle and is carried by a roller 16 supporting the flange 12.
  • the roller is arranged on an arm 15, which may have a vertical movement imparted thereto by a pneumatic cylinder 17, so that the sleeve 11 with the cone 13 is raised in a direction away from the opening into the position indicated by dotted or broken lines in FIG. 1.
  • the diaphragm 14 consists of a circular disk of a flexible material, preferably rubber, which is braced by a number of radial struts 19, which are pivotally connected at one end with the cone 13, as at 18, and at the other end with levers or links 20 pivotally secured to the spindle 2.
  • These links radially expand the diaphragm in response to downward travel of said :sleeve 11 and radially contract it inwardly in response to upward travel of said sleeve as hereafter described.
  • the links 20 have one end thereof connected to a ring 24 movable axially on the lower large diameter portion of the spindle.
  • the diaphragm When the sleeve moves upwardly the upward travel of the ring is limited by a stop 25 so the diaphragm is collapsed radially inwardly as shown in FIG. 2.
  • the diaphragm is stiffened by means of rigidifying members comprising sector shaped supporting plates 21 radially arranged on the upper side thereof. These plates are riveted to the respective struts 19 and have a curved configuration with a concave lower side and form rigidified sectors on the diaphragm as illustrated in FIG. 3.
  • the diaphragm has a slightly conical shape with an apex portion circumferentially of said sleeve and a base portion thereof has so large a diameter that a peripheral marginal edge portion seats on a circular valve seat formed by the bottom 9 coaxial with the bottom opening or openings to cover the outlet openings :10 in their entirety.
  • the diaphragm is contracted radially inwardly so that the parts 19, 20 and 21 will take the positions indicated by broken lines. The portions of the diaphragm lying between the sectors formed by the supporting plates 21 will thus be folded in the manner shown in FIG. 5.
  • the concavity of the supporting plates imparts to the intermediate portions a tendency to flex inwardly.
  • the diaphragm In its collapsed position, the diaphragm has a diameter small enough to permit the centrifuged material to pass out thrciugh the openings 10 without any risk of forming vau ts.
  • FIG. 6 Another construction of the diaphragm and associated parts is shown in FIG. 6.
  • the outer part of the diaphragm 22 is double-folded and stiffened by means of resilient insets of steel wires, for example, so as to bear with a resilient pressure in its closed position on the inner edge portion of the bottom 9 and to seat thereagainst, while in the open position it assumes the position indicated by broken lines in the figure.
  • the valve device may be provided with a sprayer screen 23 secured to the sleeve 11.
  • This screen is adapted, in the filling of the centrifuge, to throw at least a portion of the filling material out against the inner side of the centrifugal bowl during filling of the centrifuge. Consequently, the filling material does not hit the diaphragm 14.
  • This arrangement is of particular advantage in connection with filling materials which are otherwise difiicult to distribute along the inner surface of the bowl 1.
  • a centrifuge having a driven bowl having a bottom provided with a central discharge opening and circular valve seat coaxially with said central opening in said bottom, a driving spindle extending axially into said bowl, a sleeve axially slidable on said spindle, a valve member comprising a collapsible conical diaphragm having an apex portion mounted circumferentially of said sleeve for axial travel therewith and a base portion comprising a peripheral marginal edge portion movable radially outwardly of said sleeve selectively into a position seated on said circular valve seat, means for selectively axially displacing said sleeve axially on said spindle, means responsive to said axial displacement of said sleeve for contracting the diaphragm radially inwardly to uncover said discharge opening when the sleeve is moved in a direction away from said seat and for expanding the diaphragm and causing said edge portion to seat
  • a centrifuge having a driven bowl having a bottom provided with a central discharge opening and circular valve seat coaxially with said central opening in said bottom, a driving spindle extending axially into said bowl, a sleeve axially slidable on said spindle, a valve member comprising a collapsible conical diaphragm having an apex portion mounted circumferentially of said sleeve for axial travel therewith and a base portion comprising a peripheral marginal inner edge portion movable radially outwardly of said sleeve selectively into a position seated on said circular valve seat, means for selectively axially displacing said sleeve axially on said spindle, means responsive to said axial displacement of said sleeve for contracting the diaphragm radially inwardly to uncover said discharge opening when the sleeve is moved in a direction away from said seat and for expanding the diaphragm and causing said edge portion to
  • means responsive to said axial displacement of said sleeve comprises a plurality of angularly spaced links disposed extending radially inwardly toward said spindle, means pivotally connecting one end of each link to the diaphragm and means pivotally connecting the opposite end of each link to a point adjacent the periphery of said spindle, and means allowing the last-mentioned pivot means to travel axially a relatively lesser extent than said sleeve travels when displaced and in response and correspondence in time and direction with said sleeve displacement.

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  • Centrifugal Separators (AREA)
US847541A 1959-07-24 1959-10-20 Centrifuges Expired - Lifetime US3056505A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE864596X 1959-07-24

Publications (1)

Publication Number Publication Date
US3056505A true US3056505A (en) 1962-10-02

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US847541A Expired - Lifetime US3056505A (en) 1959-07-24 1959-10-20 Centrifuges

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US (1) US3056505A (it)
DE (1) DE1151221B (it)
FR (1) FR1247363A (it)
GB (1) GB864596A (it)
NL (2) NL123103C (it)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3140258A (en) * 1961-02-03 1964-07-07 Beloit Iron Works Pulp centrifuge
US3257073A (en) * 1962-03-07 1966-06-21 Richard Steimel Centrifuge having a combined cover and filling funnel
US3294317A (en) * 1963-11-27 1966-12-27 Ohg E Fonderie A Bosco S P A Device for opening the discharge opening of a hydroextractor and concurrently locking the extractor
US3655124A (en) * 1969-04-16 1972-04-11 Braunschweigische Masch Bau Auxiliary device for centering of the centrifugal drum of pendulum type hydro extractors during clearing with a high number of revolutions
US3765600A (en) * 1971-03-11 1973-10-16 R Steimel Centrifuge
US3961746A (en) * 1973-06-29 1976-06-08 Salzgitter Maschinen Aktiengesellschaft Centrifuge with a device for blocking and unblocking an opening thereof
JPS51129974A (en) * 1975-04-22 1976-11-11 Escher Wyss Ag Vertical centrifugal separator
US5217628A (en) * 1991-05-20 1993-06-08 Lundquist Lynn C Method of batch centrifugal removal of residual liquid waste from recyclable container material
US5328441A (en) * 1991-12-04 1994-07-12 Carr Engineering Associates, Inc. Imperforate bowl centrifugal separator with solids gate
US5356367A (en) * 1991-12-04 1994-10-18 Carr Engineering Associates, Inc. Centrifugal separator with flexibly suspended restrainable bowl

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2933599A1 (de) * 1979-04-06 1980-10-16 Ferrum Ag Vorrichtung zur abdeckung des produkteentleerungsschachtes bei pendelzentrifugen
EP0557560A1 (de) * 1992-02-28 1993-09-01 Braunschweigische Maschinenbauanstalt AG Siebzentrifuge zur chargenweisen Trennung von Flüssigkeits-Feststoffgemischen
FR3026025A1 (fr) * 2014-09-19 2016-03-25 Fives Cail Babcock Essoreuse centrifuge a marche discontinue

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US706441A (en) * 1901-10-04 1902-08-05 Jeremiah K Mclaughlin Pulp-separator.
US2037655A (en) * 1931-04-15 1936-04-14 Western States Machine Co Control apparatus for centrifugals
US2890716A (en) * 1956-03-16 1959-06-16 Buensod Stacey Inc Control device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE634021C (de) * 1935-04-16 1936-08-17 Roderich Freudenberg Schleudermaschine fuer koerniges Gut mit unterer Entleerungsoeffnung
DE863925C (de) * 1951-03-29 1953-01-22 Gregor Gattner Bodenverschluss fuer Zentrifugen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US706441A (en) * 1901-10-04 1902-08-05 Jeremiah K Mclaughlin Pulp-separator.
US2037655A (en) * 1931-04-15 1936-04-14 Western States Machine Co Control apparatus for centrifugals
US2890716A (en) * 1956-03-16 1959-06-16 Buensod Stacey Inc Control device

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3140258A (en) * 1961-02-03 1964-07-07 Beloit Iron Works Pulp centrifuge
US3257073A (en) * 1962-03-07 1966-06-21 Richard Steimel Centrifuge having a combined cover and filling funnel
US3294317A (en) * 1963-11-27 1966-12-27 Ohg E Fonderie A Bosco S P A Device for opening the discharge opening of a hydroextractor and concurrently locking the extractor
US3655124A (en) * 1969-04-16 1972-04-11 Braunschweigische Masch Bau Auxiliary device for centering of the centrifugal drum of pendulum type hydro extractors during clearing with a high number of revolutions
US3765600A (en) * 1971-03-11 1973-10-16 R Steimel Centrifuge
US3961746A (en) * 1973-06-29 1976-06-08 Salzgitter Maschinen Aktiengesellschaft Centrifuge with a device for blocking and unblocking an opening thereof
JPS51129974A (en) * 1975-04-22 1976-11-11 Escher Wyss Ag Vertical centrifugal separator
US4014497A (en) * 1975-04-22 1977-03-29 Escher Wyss Limited Vertical centrifuge
JPS5746899B2 (it) * 1975-04-22 1982-10-06
US5217628A (en) * 1991-05-20 1993-06-08 Lundquist Lynn C Method of batch centrifugal removal of residual liquid waste from recyclable container material
US5328441A (en) * 1991-12-04 1994-07-12 Carr Engineering Associates, Inc. Imperforate bowl centrifugal separator with solids gate
US5356367A (en) * 1991-12-04 1994-10-18 Carr Engineering Associates, Inc. Centrifugal separator with flexibly suspended restrainable bowl
US5425698A (en) * 1991-12-04 1995-06-20 Carr Engineering Associates, Inc. Centrifugal separator with flexibly suspended restrainable bowl

Also Published As

Publication number Publication date
FR1247363A (fr) 1960-12-02
NL123103C (it)
GB864596A (en) 1961-04-06
DE1151221B (de) 1963-07-04
NL250317A (it)

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