EP0590472A1 - Mélangeur magnétique - Google Patents

Mélangeur magnétique Download PDF

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Publication number
EP0590472A1
EP0590472A1 EP93115170A EP93115170A EP0590472A1 EP 0590472 A1 EP0590472 A1 EP 0590472A1 EP 93115170 A EP93115170 A EP 93115170A EP 93115170 A EP93115170 A EP 93115170A EP 0590472 A1 EP0590472 A1 EP 0590472A1
Authority
EP
European Patent Office
Prior art keywords
agitator
tube
shaft
drive
agitator according
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
EP93115170A
Other languages
German (de)
English (en)
Other versions
EP0590472B1 (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 and a contactless coupling for transmitting a drive torque from the drive via the agitator shaft to the agitator.
  • Such agitators are known, for example, as permanent magnetic rotary agitators.
  • the torque transmission between the drive motor and agitator shaft is based on the principle of the magnetic radial coupling.
  • the outer coupling part is connected to an electric motor with a continuously variable transmission and sets the inner coupling part into a rotational movement synchronous with the transmission via an air gap.
  • hydraulic, pneumatic or other types of gears can be used.
  • a can made of paramagnetic material is arranged, which is connected, for example, via a cooling column to an autoclave interior, the inner drive system being pressure-tight against the autoclave interior.
  • the cooling column keeps the high autoclave temperatures away from the magnet system and the bearings.
  • the can with the subsequent cooling column represents a common volume with the interior of the autoclave. Since the stirrer shaft is arranged and supported within the cooling column or the can, a seal must be provided within the can and the subsequent cooling column, which separates the autoclave space from the volume of the can or cooling tube, so that the agitator shaft bearing is protected from the autoclave atmosphere.
  • the rotating agitator shaft projects freely into the interior of the autoclave via this seal.
  • the bearing of this freely protruding shaft end causes problems because the shaft is easily deflected under the reaction forces and tends to vibrate.
  • the seals between the rotating agitator shaft and the stationary gap or cooling tube must not fail. Otherwise the entire batch would be lost.
  • seals and bearings represent a permanent weak point in the known magnetic agitators and have a particularly disadvantageous effect in the aseptic and sterile application area.
  • the upper part of the can or cooling tube has a constant air cushion without ventilation, which cannot be sterilized in the autoclave, or can only be sterilized with uncertainty.
  • the bearing cannot be lubricated.
  • the agitator shafts cannot be built to any length.
  • the bearings and seals to be provided within the canned tube form uncontrollable areas in which microorganisms can settle. The problems cannot be solved satisfactorily even with complex seals with barrier media.
  • the object of the invention is to avoid the disadvantages of the known agitators.
  • the object is achieved in that the non-contact coupling is provided between the agitator shaft and the agitating tool, the agitator shaft being arranged within a tube.
  • the tube serves as a guide tube for the agitator shaft. This makes it possible to run any length, because the shaft bearing can be brought up to the coupling. Normal materials can easily be used within the guide tube.
  • the pipe has no dead zone. It can be easily cleaned and sterilized. In addition, vulnerable additional mechanical seals are avoided.
  • the product in the autoclave is hermetically sealed against the environment.
  • the stirring tool is rotatably supported on the tube, in particular by means of a slide bearing, and the bearing is preferably lubricated by the medium to be stirred.
  • This storage on the fixed pipe prevents vibrations.
  • the life expectancy of the bearings is increased.
  • radial support is sufficient, since in minor cases the axial hold of the stirring tool is achieved by the magnetic forces.
  • 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.
  • the characteristics of the agitator are particularly advantageous when the agitator is used in containers for microbiological processes.
  • the design of the agitator can be further simplified if the drive is arranged in the tube, preferably without a shaft.
  • 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, 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.
  • fixed windings can also be arranged as a drive within the guide tube 1, which, with appropriate control, for example by means of known step controls, generate a rotating field, which then supply the required drive torque for the stirring tool without contact.

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)
EP93115170A 1992-10-01 1993-09-21 Mélangeur magnétique Expired - Lifetime EP0590472B1 (fr)

Applications Claiming Priority (2)

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

Publications (2)

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

Families Citing this family (16)

* 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
DE202013012407U1 (de) 2013-05-08 2016-10-11 Liquitec Ag Magnetrührwerk
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
DE102016114546A1 (de) * 2016-08-05 2018-02-08 Hans Heidolph GmbH Rührvorrichtung
DE102016114545A1 (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 (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0210651A2 (fr) * 1985-08-02 1987-02-04 Inoue Seisakusho (Mfg) Co., Ltd. Dispositif pour agiter et similaire
JPS6336825A (ja) * 1986-07-28 1988-02-17 Satake Kagaku Kikai Kogyo Kk 撹拌装置
US4806020A (en) * 1986-04-21 1989-02-21 Sendai Mechanic Kogyo Kabushiki Kaisha Magnetic rotator
US5061079A (en) * 1989-03-10 1991-10-29 Satake Chemical Equipment Mfg., Ltd. Stirrer

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1905322C3 (de) * 1969-02-04 1974-06-06 Andreas Hofer Hochdrucktechnik Gmbh, 4330 Muelheim Vorrichtung zum automatischen Wiederanlassen einer außer Tritt gefallenen Synchron-Dauermagnetkupplung
DE3637863A1 (de) * 1986-11-06 1988-05-19 Horst Haering Ruehrvorrichtung
DE3839693A1 (de) * 1988-11-24 1990-05-31 Normag Labor Und Verfahrenstec Ruehrverschluss
DE3942679A1 (de) * 1989-12-22 1991-06-27 Ekato Ind Anlagen Verwalt Mischvorrichtung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0210651A2 (fr) * 1985-08-02 1987-02-04 Inoue Seisakusho (Mfg) Co., Ltd. Dispositif pour agiter et similaire
US4806020A (en) * 1986-04-21 1989-02-21 Sendai Mechanic Kogyo Kabushiki Kaisha Magnetic rotator
JPS6336825A (ja) * 1986-07-28 1988-02-17 Satake Kagaku Kikai Kogyo Kk 撹拌装置
US5061079A (en) * 1989-03-10 1991-10-29 Satake Chemical Equipment Mfg., Ltd. Stirrer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 12, no. 248 (C - 511)<3095> 13 July 1988 (1988-07-13) *

Also Published As

Publication number Publication date
DE4232935A1 (de) 1994-04-07
DE4232935C2 (de) 1996-03-28
JPH07788A (ja) 1995-01-06
EP0590472B1 (fr) 1996-12-11

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