EP0590472B1 - Mélangeur magnétique - Google Patents

Mélangeur magnétique Download PDF

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Publication number
EP0590472B1
EP0590472B1 EP93115170A EP93115170A EP0590472B1 EP 0590472 B1 EP0590472 B1 EP 0590472B1 EP 93115170 A EP93115170 A EP 93115170A EP 93115170 A EP93115170 A EP 93115170A EP 0590472 B1 EP0590472 B1 EP 0590472B1
Authority
EP
European Patent Office
Prior art keywords
tube
agitator
drive
shaft
agitator 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.)
Expired - Lifetime
Application number
EP93115170A
Other languages
German (de)
English (en)
Other versions
EP0590472A1 (fr
Inventor
Hans Peter Meier
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.)
Mavag Verfahrenstechnik AG
Original Assignee
Mavag Verfahrenstechnik AG
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 Mavag Verfahrenstechnik AG filed Critical Mavag Verfahrenstechnik AG
Publication of EP0590472A1 publication Critical patent/EP0590472A1/fr
Application granted granted Critical
Publication of EP0590472B1 publication Critical patent/EP0590472B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/45—Magnetic mixers; Mixers with magnetically driven stirrers
    • B01F33/453—Magnetic mixers; Mixers with magnetically driven stirrers using supported or suspended stirring elements

Definitions

  • the invention relates to an agitator with an agitator shaft, a drive, an agitator tool and a contactless coupling for transmitting a drive torque from the drive via the agitator shaft to the agitator tool.
  • an agitator with an agitator shaft and a drive via a drive belt is known.
  • the belt drives a pulley, which in turn is connected to a contactless coupling.
  • the contactlessly acting magnetic coupling transmits the drive torque to a second coupling part arranged within a can, which is firmly connected to a stirring shaft which projects into a container and has a stirring tool on the lower part.
  • the tube which has the secondary part of the electromagnetic coupling on the inside, hermetically seals the container from the outside.
  • the interior of the tube with two bearing points for the secondary part of the magnetic coupling and for the flying mounting of the agitator axis thus forms part of the interior of the container.
  • an agitator which has a tube projecting into the tank, the stator of an electromotive drive being inserted into the tube.
  • the tube is also from encased a second tube, which in turn has stirring tools fixedly attached to it.
  • the inner tube hermetically separates the contents of the container from the environment.
  • the outer tube is also supported in the upper flange area. In addition, it is stored again at the lower end of the inner tube.
  • This stirrer is completely unsuitable for sterile applications because it has long, difficult to access gaps and several storage points inside the container.
  • specially designed motors are required for agitators according to EP 02 10 651 A2, the cooling of which inside the tube can be problematic if, as usual, process heat is generated in the container and is transferred to the motor.
  • US 5 061 079 describes an agitator in which a stator is provided in part of the mixing vessel. In this way, the mixing vessel can be completely encapsulated.
  • a rotor is placed on the stator without contact in the mixing vessel. During operation, the rotor sucks in liquid between the vessel wall and the inside of the rotor by means of blades, which can escape again through an opening on the top of the rotor. Due to the excess pressure inside the rotor, the rotor is raised and then runs with low friction losses. The constant flow of liquid through the rotor ensures thorough mixing of the liquid in the mixing vessel.
  • a disadvantage of this agitator is that it cannot be used for microbiological processes. Strong shear forces occur when flowing through the rotor, which would destroy the microorganisms. In addition, this stirrer drive also has cooling problems with the stator when the device is used in exothermic processes.
  • the object of the invention is therefore to provide a stirrer using known standard motors, which is easy to sterilize for aseptic and sterile processes.
  • the agitator shaft is encased by a tube which is open on one side and is connected to the drive through the opening of the tube, the non-contact coupling being provided between the agitator shaft and the agitating tool arranged outside the tube.
  • Commercially available electric motors can be used, the cooling of which outside the container presents no difficulties.
  • the agitator shaft can be easily stored inside the pipe, even with tall containers. Malfunctions due to defective bearings are therefore not to be feared. This is particularly important because the batches in fermenters, for example for the production of pharmaceuticals, are very valuable. Such batches are endangered by disruptions in process control.
  • the agitator shaft is mounted at least twice within the tube.
  • the deflections of the agitator shafts known from the prior art are advantageously avoided by this measure.
  • Critical shaft speeds are mastered.
  • the stirring tool can be provided at the optimal location for stirring and mixing.
  • the measure that the stirring tool is designed as an impeller with an inner surface partially enveloping the tube and an outer surface with at least one channel connecting the two surfaces serves to improve the self-cleaning property of the stirring tool.
  • the inner area around the bearing is constantly rinsed with the product to be mixed.
  • the cleaning liquid also reaches the hard-to-reach places in the area of the bearings.
  • the product or the cleaning liquid can also run out of the stirring tool after the container has been emptied.
  • the hermetic separation of the container interior is achieved in that the tube has a seal or sealing surface at the drive end.
  • the attachment of the stirring tool to the container is made easier if the tube has a mounting flange at the drive end.
  • a second clutch is arranged between the drive and agitator shaft serves to facilitate disassembly of the agitator.
  • the tube has an interior that is heatable or coolable.
  • the tube itself is coolable or heatable, preferably double-walled for this purpose.
  • 1 denotes a bearing and protective tube, within which a drive shaft 2 is rotatably fixed by means of bearings 7 and 8.
  • the lower end of the bearing and protective tube 1 is designed as a pot-like can 12, which forms the end of the bearing and guide tube.
  • the agitator shaft 2 projects into the can 12 and carries at its lower end a magnetic disk 5 equipped with a plurality of permanent magnets in a rotationally fixed manner.
  • the can 12 is partially enveloped by the impeller head 13. Inside the impeller head 13 is the magnetic disk 5 a number of oppositely polarized permanent magnets, not shown, is arranged opposite, so that a torque can be transmitted from the drive shaft 2 to the impeller head 13 without contact by the magnetic forces between the magnetic disk 5 and the permanent magnets.
  • the impeller head 13 carries vanes 4 attached to webs as stirring tools.
  • the impeller head is supported by the product-lubricated slide bearing 6, which is seated on a shaft stub 14 formed downwards on the can 12.
  • the inner depression with the surface 15 of the impeller 13 is connected via channel 3 to the outer surface 16 of the impeller 13.
  • a pump effect is generated from the channel 3, which is directed radially outwards in some way, and allows the liquid present in the pot-shaped cavity of the impeller 13 to flow outwards.
  • the inner surface of the impeller is constantly rinsed with product liquid, which has a self-cleaning effect.
  • the upper end of the guide and bearing tube ends in a guide surface 17 with a subsequent mounting flange 18.
  • a sealing groove with a seal 11 is formed, which closes the gap between the guide surface 17 and the mounting socket 19 in the container wall 20.
  • the mounting piece 19 and wall 20 is shown in broken lines.
  • the agitator shaft 2 is connected to drive 10 via coupling 9 and gear 21.
  • the drive 10 and the gear 21 are coaxially screwed directly onto the mounting flange 18.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Accessories For Mixers (AREA)

Claims (9)

  1. Mélangeur ou agitateur comprenant un arbre de mélangeur, un moyen d'entraînement, un outil de mélangeur et un embrayage sans contact pour transmettre le couple d'entraînement du moyen d'entraînement à l'outil mélangeur par l'intermédiaire de l'axe de mélangeur,
    caractérisé en ce que
    l'axe de mélangeur (2) est entouré par un tube (1) ouvert à une extrémité et relié à travers l'ouverture du tube au moyen d'entraînement (10), l'embrayage (5) fonctionnant sans contact, étant prévu entre l'arbre (2) du mélangeur et l'outil (4) du mélangeur à l'extérieur du tube.
  2. Mélangeur selon la revendication 1,
    caractérisé en ce que
    l'arbre (2) est monté dans le tube (1) par l'intermédiaire d'au moins deux paliers.
  3. Mélangeur selon la revendication 1 ou 2,
    caractérisé en ce que
    l'outil de mélangeur (4) est réalisé sous la forme d'une hélice avec une surface intérieure (15) entourant au moins partiellement le tube (1) et une surface extérieure (16) avec au moins un canal (3) reliant les deux surfaces extérieures.
  4. Mélangeur selon l'une des revendications 1, 2 ou 3,
    caractérisé en ce que
    le canal (3) présente une pente.
  5. Mélangeur selon l'une des revendications 1, 2, 3 ou 4,
    caractérisé en ce que
    à l'extrémité de sortie le tube (1) comporte un joint (11) ou une surface d'étanchéité (17).
  6. Mélangeur selon l'une des revendications 1, 2, 3, 4 ou 5,
    caractérisé en ce que
    le tube (1) présente une bride de montage (18) à son extrémité située du côté du moyen d'entraînement.
  7. Mélangeur selon l'une des revendications 1, 2, 3, 4, 5 ou 6,
    caractérisé en ce que
    un second embrayage (9) est prévu entre le moyen d'entraînement (10) et l'arbre (2) du mélangeur.
  8. Mélangeur selon l'une des revendications 1, 2, 3, 4, 5, 6 ou 7,
    caractérisé en ce que
    le tube (1) présente un volume intérieur qui peut être chauffé ou refroidi.
  9. Mélangeur selon l'une des revendications 1, 2, 3, 4, 5, 6, 7 ou 8,
    caractérisé en ce que
    le tube (1) peut être directement refroidi ou chauffé et comporte de préférence, à cet effet, une double paroi.
EP93115170A 1992-10-01 1993-09-21 Mélangeur magnétique Expired - Lifetime EP0590472B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4232935A DE4232935C2 (de) 1992-10-01 1992-10-01 Magnetrührwerk
DE4232935 1992-10-01

Publications (2)

Publication Number Publication Date
EP0590472A1 EP0590472A1 (fr) 1994-04-06
EP0590472B1 true EP0590472B1 (fr) 1996-12-11

Family

ID=6469333

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93115170A Expired - Lifetime EP0590472B1 (fr) 1992-10-01 1993-09-21 Mélangeur magnétique

Country Status (3)

Country Link
EP (1) EP0590472B1 (fr)
JP (1) JPH07788A (fr)
DE (1) DE4232935C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013104788A1 (de) 2013-05-08 2014-11-13 Liquitec Ag Magnetrührwerk

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19544529C2 (de) * 1995-11-29 2000-03-09 Alfred Wanner Magnetisches Rührsystem mit Zwangskonvektion zur Vermeidung von Toträumen und Zweiphasenrührreaktor
DE19963542C2 (de) * 1999-12-22 2003-08-28 Freyer Thomas Vorrichtung zur Mischung mehrkomponentiger Fluide
DE10318599A1 (de) * 2003-04-24 2004-11-11 Mavag Verfahrenstechnik Ag Rührer zum Mischen, Homogenisieren und Dispergieren
DE102009021992B3 (de) * 2009-05-19 2010-12-09 PRG Präzisions-Rührer GmbH Magnetrührwerk
DE102010016014A1 (de) 2010-03-18 2011-09-22 PRG Präzisions-Rührer GmbH Antriebseinheit für ein Rührwerk
DE102012005640B4 (de) 2012-03-21 2017-01-26 Festo Ag & Co. Kg Mischvorrichtung
DE102012019215B4 (de) * 2012-10-01 2014-10-30 Sartorius Stedim Biotech Gmbh Rührereinbauhilfe und Verfahren zum Einbau eines Rührorgans in einen Bioreaktor
DE102014204156A1 (de) * 2014-03-06 2015-09-10 Volkswagen Aktiengesellschaft Elektromotor
DE102015106566B3 (de) 2015-04-28 2016-06-09 PRG Präzisions-Rührer GmbH Antriebseinheit für ein Rührwerk und Rührwerk
DE102016005240B4 (de) * 2016-04-29 2018-12-13 Sartorius Stedim Biotech Gmbh Mischvorrichtung
JP6770734B2 (ja) * 2016-07-05 2020-10-21 ヤヨイ化学工業株式会社 ローター分離型撹拌機
DE102016114545A1 (de) * 2016-08-05 2018-02-08 Hans Heidolph GmbH Rührvorrichtung
DE102016114546A1 (de) * 2016-08-05 2018-02-08 Hans Heidolph GmbH Rührvorrichtung
DE202017103837U1 (de) * 2017-06-27 2018-10-01 Hans Heidolph GmbH Rührvorrichtung, insbesondere Überkopf-Rührer
CN112942751A (zh) * 2021-04-19 2021-06-11 深圳市汇德绘设计事务有限公司 一种建筑装修用室内粉刷墙装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1905322A1 (de) * 1969-02-04 1970-08-06 Andreas Hofer Hochdruck Appbau Verfahren zum automatischen Wiederanlassen einer abgefallenen Dauermagnetkupplung fuer Drehruehrer

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3681846D1 (de) * 1985-08-02 1991-11-14 Inoue Mfg Vorrichtung zum agitieren und dergleichen.
JPS62247830A (ja) * 1986-04-21 1987-10-28 Sendai Mech Kogyo Kk 磁気回転体
JPS6336825A (ja) * 1986-07-28 1988-02-17 Satake Kagaku Kikai Kogyo Kk 撹拌装置
DE3637863A1 (de) * 1986-11-06 1988-05-19 Horst Haering Ruehrvorrichtung
DE3839693A1 (de) * 1988-11-24 1990-05-31 Normag Labor Und Verfahrenstec Ruehrverschluss
KR0138254B1 (ko) * 1989-03-10 1998-04-27 니시오카 시게루 교반장치
DE3942679A1 (de) * 1989-12-22 1991-06-27 Ekato Ind Anlagen Verwalt Mischvorrichtung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1905322A1 (de) * 1969-02-04 1970-08-06 Andreas Hofer Hochdruck Appbau Verfahren zum automatischen Wiederanlassen einer abgefallenen Dauermagnetkupplung fuer Drehruehrer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013104788A1 (de) 2013-05-08 2014-11-13 Liquitec Ag Magnetrührwerk
DE202013012407U1 (de) 2013-05-08 2016-10-11 Liquitec Ag Magnetrührwerk

Also Published As

Publication number Publication date
JPH07788A (ja) 1995-01-06
DE4232935A1 (de) 1994-04-07
EP0590472A1 (fr) 1994-04-06
DE4232935C2 (de) 1996-03-28

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