EP0706829B1 - Tambour centrifuge - Google Patents

Tambour centrifuge Download PDF

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Publication number
EP0706829B1
EP0706829B1 EP95115891A EP95115891A EP0706829B1 EP 0706829 B1 EP0706829 B1 EP 0706829B1 EP 95115891 A EP95115891 A EP 95115891A EP 95115891 A EP95115891 A EP 95115891A EP 0706829 B1 EP0706829 B1 EP 0706829B1
Authority
EP
European Patent Office
Prior art keywords
chamber
valve
closing
outlet
control
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
EP95115891A
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German (de)
English (en)
Other versions
EP0706829A1 (fr
Inventor
Siegfried Dr.-Ing König
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.)
Flottweg GmbH
Original Assignee
Flottweg GmbH
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
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Application filed by Flottweg GmbH filed Critical Flottweg GmbH
Publication of EP0706829A1 publication Critical patent/EP0706829A1/fr
Application granted granted Critical
Publication of EP0706829B1 publication Critical patent/EP0706829B1/fr
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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
    • B04B1/10—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl
    • B04B1/14—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl with periodical discharge

Definitions

  • the invention relates to a centrifugal drum of a self-draining centrifuge with a hydraulically operated, axially movable piston valve, the one Seals solids space against at least one solids outlet, the piston valve via one with a locking medium, preferably locking water fillable lock chamber is held in its closed position, preferably one hydraulically movable piston valve, which is arranged in an outlet chamber is and the closing chamber seals against an outlet, whereby the piston valve on an energy accumulator arranged in the outlet chamber, preferably supports one or more compression springs and a passage opening has, through which lock chamber and outlet chamber connectable are, and a control line, via which control fluid to the energy storage opposite effective area of the piston valve can be fed.
  • DE-PS 19 09 996 discloses a centrifugal drum of a clarifier with a rotor body, in which a separation space and a set of plate inserts are arranged.
  • the wall of the rotor body has outlet openings on, which are closed by a piston valve, the Movement of the spool with a control liquid, for example water is performed.
  • the control liquid is a via a fixed line Space fed to the bottom of the spool.
  • the room has an outlet, which can be closed by means of a ring valve supported on springs is.
  • This ring valve is arranged in one chamber and can be opened in a second Control line with control liquid are applied so that the ring valve the outlet opening of the space located below the piston valve opens.
  • this known centrifugal drum has another control line with the one below the ring valve arranged space is connected.
  • this space is previously filled with control liquid via the control line, so that with further inflow of control fluid via the in the ring valve arranged bore the pressure in this room increases and the ring valve after a short opening time pushes back into the starting position.
  • centrifugal drum enables accelerated partial emptying the drum, however, can be by the simultaneous supply of Closing and opening water a complete emptying with safe keeping of the Discharge openings not closed.
  • centrifuges are required to perform full emptying in this way can that the solids space can be kept safely open to any Rinsing the plate pack to remove solid deposits to be able to perform.
  • centrifugal drums there are also a variety of designs of centrifugal drums previously known to use control systems with chambers that at a When completely drained, take up the entire closing water liquid and at Partial drains can be prefilled. These chambers are over throttled Outlets opened, so that the operation of such centrifugal drums exactly dosed control water supply presupposes, which is often complicated in practice is and requires complex control water treatment. Besides, it is structurally complex, the corresponding paths and closing speeds to master the spool in such centrifugal drums, so that among other things, complex control valves must be used, the one additional opening of the chamber to the outside to create inertia minimize these remarks.
  • control valves are however very limited, because of the limited executable Bore cross sections only a restricted escape of the control fluids is possible.
  • the scope of such Centrifugal drum several control valves are provided, which in addition should avoid tilting of the valve spool.
  • centrifugal drum is known for example from DE-PS 32 40 093, which is provided with a valve slide, which is used in the more common Partial emptying constantly via a pressure medium, namely one Closing liquid is pressed into its closed position.
  • a pressure medium namely one Closing liquid is pressed into its closed position.
  • the invention has for its object to design a centrifugal drum of the type mentioned in such a way that partial emptying with accelerated closing and large lifting height of the piston valve are possible and optionally completely controllable full emptying of the drum without the negative influence of a Collection chamber on the outflow of the closing liquid and in particular without being able to carry out the pre-filling in the event of partial emptying.
  • a centrifugal drum according to the invention that the outlet chamber is sealed by means of a preferably hydraulically controllable control slide against at least one outlet opening into which the flowing medium flowing into the outlet chamber flows freely when the solids space is completely emptied, the control slide mechanically over at least an energy store is held in its closed position.
  • a full drain should now be carried out become, during the above process without Closing medium supply of the controllable control slide by means of a Control liquid controlled so that it releases the outlet opening, via which can drain the closing medium arranged in the outlet chamber.
  • the drum now remains open until the control liquid supply is over stopped the piston valve and then the closing chamber again is filled with locking liquid.
  • the energy store presses namely the Compression springs return the control spool to its original position, so that the Outlet opening of the outlet chamber is sealed and in the Exhaust chamber increasing fluid pressure sealing the piston valve against the Outlet pushes.
  • the closing water remaining in the outlet chamber can then flow out through a throttled outlet.
  • control slide is substantially U-shaped in cross section and with its Legs forms part of the housing. Accordingly, the spool has an essentially pot-shaped design and encompasses with his Legs the area of the housing in which the outlet chamber is arranged.
  • control slide and the piston valve are through coordinated calibration of feed channels for opening the Control spool on the one hand and the movement of the piston valve on the other, in Connection with the dimensioning of the radius R via a common control water supply controllable.
  • the radius R is the dimension the supply chamber for the control liquid.
  • This feed chamber can be in shape an overflow weir be formed that the two feed channels to the Control spool on the one hand and to the piston valve on the other hand separates.
  • control slide and the piston valve can be controlled via separate control water supply lines.
  • a centrifugal drum shown in the drawing has a centric Inlet 1 for a solid-liquid mixture to be separated, via which the solid-liquid mixture arrives in a centrifugal space 2, which consists of a separation space 4 and a solid space 6 is composed.
  • the solid space 6 is designed as a double cone and in its lower area by one Piston slide 8 limits one provided in the drum jacket 9 Solid outlet for the solids closes or releases when the Piston slide 8 axially from the closed position shown in the drawing is moved within the centrifugal space 2.
  • the centrifugal drum has a drum cover 3 in its upper region closed, which is connected by a locking ring 5 to the drum shell 9 is.
  • a Locking liquid namely locking water via a fixed control water supply line 30 and a channel 28 acted upon closing chamber provided in whose outer peripheral region are arranged outlet channels 11, which Connect the lock chamber 10 to an outlet chamber 12.
  • An annular valve in the form of a piston valve 16 is arranged in the outlet chamber 12, which is supported on springs 21.
  • the piston valve 16 is thus can be moved parallel to the piston slide 8 in the axial direction of the centrifugal drum stored in the outlet chamber 12.
  • the piston valve 16 supporting springs 21 are supported on a ring member 19 which with the Drum shell 9 is screwed tight.
  • sealing bodies 23 are arranged, which are the outlet channels seal from the closing chamber 10 against the outlet chamber 12.
  • the piston valve 16 by means of the springs 21 against the inner surface of the Drum shell 9 pressed, in which the outlet channels 11 are arranged.
  • the centrifugal drum also has a control water supply line 32, which via channels 24 and 27 control water between the piston valve 16 and the Drum casing 9 promotes, so that hydraulic pressure builds up in this area which is larger than that by the springs on the underside of the Piston valve 16 applied pressure so that the piston valve 16 by acting with control water via the control water supply line 32 and the channels 24 and 27 moved in the axial direction of the centrifugal drum into the outlet chamber becomes.
  • the piston valve 8 in its Control water holding the closed position can thus enter the outlet channel 11 into the Outlet chamber 12 and through passages 22 in the piston valve 16 in a below of the piston valve 16 arranged chamber 17 suddenly flow.
  • the repression the control water from the lock chamber 10 takes place here by the pressure built up in the separation chamber 2, which acts on the piston slide 8 and moved this down.
  • the spool 8 Through this movement of the spool 8 the ejection openings 7 released so that solids via the ejection opening 7 can emerge from the centrifugal drum.
  • the chamber 17 arranged below the piston valve 16 has a smaller one Volume than the closing chamber 10, so that the chamber 17 is only a part of the escaping locking water escaping from the locking chamber 10.
  • the Closing water flowing under the piston valve 16 thus builds on the underside of the piston valve 16 a pressure supporting the spring 21, which the Piston valve 16 returns to its closed position.
  • By closing the Outlet channel 11 and the constant supply of closing water increases Pressure in the closing chamber 10 so that the closing water Piston slide 8 also transferred to its closed position and this the Ejection opening 7 closes.
  • the closing water flowing into the outlet chamber 12 during the partial emptying flows through throttled outlets after the opening process is completed 13 from.
  • the centrifugal drum also has an axially movable control slide 20 on the springs 25 against a sealing ring 14, for example made of polyamide, is pressed.
  • the springs 25 are supported in one, one in cross section U-shaped recess from the ring, which is fixed to the drum shell 9 is screwed.
  • the control slide 20 closes the chamber 17th between the piston valve 16 and a ring member 19 which is fixed to the Drum shell 9 is connected and on which the springs 21 of the Support piston valve 16.
  • control slide 20 is in cross section formed essentially U-shaped, with its legs part of the outer surface the centrifugal drum and have throttled outlets 15 and 18, which allow the control fluid to flow out.
  • a channel 26 for Supply of control water Between the drum jacket 9 and the control slide 20 is a channel 26 for Supply of control water arranged, the channel 26 to a control water supply line 31 is connected.
  • a pressure generated that is greater than the pressure acting on the spool 20 Springs 25 so that the spool 20 in the axial direction towards the springs 25 is moved.
  • This movement of the control slide 20 gives an annular gap in the Area of the sealing ring 14 free, so that located in the chamber 17 Control water can flow through this annular gap. The chamber 17 is thus ineffective.
  • control fluid is supplied via the control water supply 32 and the channels 24 and 27 of the outlet chamber 12 are supplied.
  • the Outlet chamber 12 creates a hydraulic pressure that the piston valve 16 after below, i.e. moves against the force of the springs 21 and the outlet channels 11 opens.
  • the pressure in the closing chamber 10 drops and the pressure on the piston valve in the centrifugal chamber 2 shifts the Piston slide 8 displacing what is arranged in the locking chamber Closing water in the axial direction such that the discharge openings 7 be released.
  • control and / or Locking water supply line 31 control and / or locking water into channel 26 passed so that between the spool 20 and the Drum shell 9 screwed ring part 19, a pressure is built up after Overcoming the force from the springs 25, the spool 20 in this way moves that the annular gap is opened in the area of the sealing ring 14, so that existing or inflowing closing water in the chamber 17 can flow out this annular gap. If one now carries out the procedure of above-mentioned partial emptying, it can be seen that the Chamber 17 is ineffective, so that closing water flowing into this chamber does not cause the piston valve to move out of the Open position is transferred to its closed position.
  • the illustrated embodiment of the centrifugal drum according to the invention sees separate control or closing water supply lines 30 and 31 for the control slide 20 and the piston valve 16 before.
  • the Control slide 20 and the piston valve 16 by coordinated calibration of supply channels 24, 26 and 27 for the opening of the control slide 20 on the one hand and the movement of the piston valve 16 on the other hand with the dimensioning of the radius R via a common control water supply are controllable.
  • a so-called overflow weir arranged by a Partition plate between the two feed channels 26 and 27 is formed and the the inflow of the control water into one or the other feed channel controls.

Landscapes

  • Centrifugal Separators (AREA)

Claims (4)

  1. Bol d'une centrifugeuse à vidange automatique, comprenant un piston-tiroir (8) qui est mobile axialement et est actionné hydrauliquement et qui étanche une chambre pour solides (6) vis à vis d'au moins une sortie pour solides (7), ledit piston-tiroir étant maintenu dans sa position de fermeture par le moyen d'une chambre de fermeture (10) pouvant être remplie d'un milieu de fermeture, de préférence d'eau de fermeture ; une soupape à tiroir (16) mobile de préférence par hydraulique, laquelle soupape est arrangée dans une chambre de sortie (17) et étanche la chambre de fermeture (10) vis à vis une sortie, ladite soupape à tiroir (16) prenant appui sur d'un accumulateur d'énergie arrangé dans la chambre de sortie (17), de préférence sur une ou plusieurs ressorts de compression (21), et ayant une orifice de passage (22) pour mettre en communication la chambre de fermeture (10) avec la chambre de sortie (17) ; et une conduite de pilotage (24), au moyen de laquelle peut être alimenté de liquide de commande vers la surface effective de la soupape à tiroir (16) opposée l'accumulateur d'énergie ; caractérisé en ce que
    la chambre de sortie (17) est rendue étanche vis à vis d'au moins une orifice d'échappement par le moyen d'un tiroir de commande (20), de préférence à commande hydraulique, à travers laquelle orifice d'échappement s'écoule, à la vidange complète de la chambre pour solides (6), le milieu de fermeture admis dans la chambre de sortie (17), le tiroir de commande (20) étant maintenu mécaniquement dans sa position de fermeture par le moyen d'au moins un accumulateur d'énergie (25).
  2. Bol selon la revendication 1, caractérisé en ce que
    le tiroir de commande (20) a un profil essentiellement en forme d'U, et que ledit tiroir forme, par ses branches, une partie de la boíte.
  3. Bol selon la revendication 1, caractérisé en ce que
    le tiroir de commande (20) et la soupape à tiroir (16) peuvent être commandés par le calibrage coordiné de canaux d'alimentation (24, 26, 27) pour l'ouverture du tiroir de commande (20) d'une part et le mouvement de la soupape à tiroir (16) d'autre part, en rapport avec le dimensionnement du rayon R, via une conduite d'alimentation d'eau de commande commune.
  4. Bol selon la revendication 1, caractérisé en ce que
    le tiroir de commande (20) et la soupape à tiroir (16) peuvent être commandés via conduites d'alimentation d'eau de commande séparées (31).
EP95115891A 1994-10-12 1995-10-09 Tambour centrifuge Expired - Lifetime EP0706829B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4436459A DE4436459C2 (de) 1994-10-12 1994-10-12 Schleudertrommel
DE4436459 1994-10-12

Publications (2)

Publication Number Publication Date
EP0706829A1 EP0706829A1 (fr) 1996-04-17
EP0706829B1 true EP0706829B1 (fr) 2001-06-06

Family

ID=6530589

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95115891A Expired - Lifetime EP0706829B1 (fr) 1994-10-12 1995-10-09 Tambour centrifuge

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EP (1) EP0706829B1 (fr)
DE (2) DE4436459C2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10102253C2 (de) * 2001-01-19 2003-11-06 Westfalia Separator Ag Zentrifuge
DE102004051264A1 (de) * 2004-10-21 2006-04-27 Westfalia Separator Ag Separator mit einer Schleudertrommel und einem Kolbenschieber
DE102008048934A1 (de) * 2008-09-25 2010-04-01 Gea Westfalia Separator Gmbh Zentrifuge mit einer selbstentleerenden Schleudertrommel
EP2774684B1 (fr) * 2013-03-06 2018-10-17 Alfa Laval Corporate AB Séparateur centrifuge

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1657269A1 (de) * 1967-03-29 1971-02-11 Alfa Laval Ab Zentrifuge mit intermittierendem teilweisem sowie vollem Austrag des Rotorinhalts
SE321896B (fr) * 1968-02-29 1970-03-16 Alfa Laval Ab
DE3240093C2 (de) * 1982-10-29 1986-03-27 Westfalia Separator Ag, 4740 Oelde Zentrifuge mit einer selbstentleerenden Schleudertrommel

Also Published As

Publication number Publication date
EP0706829A1 (fr) 1996-04-17
DE4436459C2 (de) 1997-04-24
DE59509317D1 (de) 2001-07-12
DE4436459A1 (de) 1996-04-18

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