EP0360767A1 - Unité d'agitation à entraînement magnétique - Google Patents

Unité d'agitation à entraînement magnétique Download PDF

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Publication number
EP0360767A1
EP0360767A1 EP89830408A EP89830408A EP0360767A1 EP 0360767 A1 EP0360767 A1 EP 0360767A1 EP 89830408 A EP89830408 A EP 89830408A EP 89830408 A EP89830408 A EP 89830408A EP 0360767 A1 EP0360767 A1 EP 0360767A1
Authority
EP
European Patent Office
Prior art keywords
stirring
unit according
stirring unit
flanged plate
stirring element
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Withdrawn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
EP89830408A
Other languages
German (de)
English (en)
Inventor
Salvatore Lardieri
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.)
Cora Di Lardieri Salvatore
Original Assignee
Cora Di Lardieri Salvatore
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 Cora Di Lardieri Salvatore filed Critical Cora Di Lardieri Salvatore
Publication of EP0360767A1 publication Critical patent/EP0360767A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • B01F33/4535—Magnetic mixers; Mixers with magnetically driven stirrers using supported or suspended stirring elements using a stud for supporting the stirring element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/10—Maintenance of mixers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/40—Mounting or supporting mixing devices or receptacles; Clamping or holding arrangements therefor
    • B01F35/41—Mounting or supporting stirrer shafts or stirrer units on receptacles
    • B01F35/411—Mounting or supporting stirrer shafts or stirrer units on receptacles by supporting only one extremity of the shaft
    • B01F35/4112—Mounting or supporting stirrer shafts or stirrer units on receptacles by supporting only one extremity of the shaft at the bottom of the receptacle, e.g. by studs

Definitions

  • the present invention refers to the field of the industrial mixing equipments with particular, even if not exclusive, reference to the chemical and pharmaceutical field, and, more precisely, concerns a magnetic drive stirring unit.
  • the stirring equipments known in the art comprise a stirring element, whose design and construction varies according to the uses, integral to a supported shaft, usually on rolling bearings, placed outside the container, which holds the product to be mixed.
  • Mechanical seals are arranged between the shaft and the container in order to prevent, or at least to limit, the environment pollution and/or the product contamination.
  • Magnetic drive stirring units essentially used in laboratory vessels and small scale plants, are also well known in the art. These stirring units assure the best seal conditions required in most appliances, because they comprise a stirring element inside the vessel magnetically coupled to an outer driving device without any mutual mechanical joint as well as mechanical seals.
  • Another object of the present invention is to provide a magnetic drive stirring unit capable of being easily and rapidly installed on the container and without significant maintenance problems.
  • the novel feature of the magnetic drive stirring unit according to the invention consists in that it comprises a flanged plate seal mountable in correspondence with a bottom opening of the vessel containing the product to be mixed, from said flanged plate centrally extending a tubular casing on which a stirring element is pivotally mounted, while the driving device is installed inside said tubular casing, in coaxial relation with the stirring element and the container, and is supported by said flanged plate.
  • the stirring element is supported on friction bearings.
  • the flanged plate is fixed to a corresponding counterflange of the container by means of a rapid lock connection engaging with two tapered surfaces correspondingly formed on said flanged plate and said counterflange.
  • a flanged plate preferably of circular shape, from the central part of which a tubular casing 2 extends upwardly, whose free end is closed by a wall 3.
  • a driving unit able to produce a rotating magnetic field, is housed within the tubular casing 2, that has a cylindrical shape.
  • the driving unit 4 consists of a shaft 5, to the end of which a magnet 6 is keyed.
  • the shaft 5 is supported by bearings, not shown, housed within a bracket 7 fixed to the plate 1.
  • a stirring element 8 for instance a propeller, radially extends from an annular support body 9 that is pivotally mounted on the outer side of tubular casing 2 in a coaxial relation with shaft 5. Within the annular body 9 there is mounted a second magnet 10 of annular shape driven in rotation by the rotating magnet 6.
  • Annular body 9 rotates by sliding on side cylindrical surface of tubular casing 2, friction bearing means being provided therebetween.
  • the friction bearing means comprises a pair of substantially L-shaped rings 11, fixed to the outer side of tubular casing 2 in correspondence with the base and, respectively the free end thereof, and a pair of squared section rings 12 correspondingly fixed to the ends of annular body 9 with a face frictionally contacting a corresponding face of L-shaped rings 11.
  • Rings 11 and 12 are made of a material that does not exhibit overheating during the use and compatible with the product to be mixed; the most suitable material for each case can be easily chosen by a person skilled in the art.
  • the above described stirring unit is set in correspondence with opening 13, formed in the bottom of a vessel or container 14, in order that the tubular casing 2 results inside the container 14 itself.
  • the bottom opening 13 is provided with a counterflange 15 matching the flange 1a of the plate 1 by interposition of a sealing member, for instance an o-ring 16.
  • the coupling between the flange 1a and the counterflange 15 is firmly assured by a rapid lock connection 17, for instance a jaw connection, as schematically shown in figure 1.
  • the outer faces of the flange 1a and of the counterflange 15 are tapered and converging, giving rise altogether to a frustum of cone surface with which the correspondingly shaped rapid lock connection 17 can be firmly engaged.
  • a through hole 18, normally plugged by a cap 19 is formed in the plate 1, and a large conic hollow 20 is formed on the internal surface of the plate 1 in order to make easier the drainage of the product.
  • the stirring element 8 may be of the blade type or a propeller, or it may have any other shape chosen by the designer as a function of the kind of material to be mixed.
  • FIG. 2 A simplified structure of the stirring unit according to the invention is shown in the embodiment of Figure 2.
  • the tubular casing 2 is fixed, for example by means of welding, to the flanged plate 1
  • the annular body 9, which supports the propeller 8 is fixed to a bell-shaped support 23, coaxially arranged over the tubular casing 2.
  • Support 23, which houses the magnetic element or rotor 9, is magnetically driven into rotation around the tubular casing 2, frictional bearing means being provided comprising two rings 21 and 22.
  • the first ring 21 is housed in a peripheral seat of the plate 3, while the second ring 22 is housed in a seat formed at the base of the tubular casing 2.
  • the bell-shaped support 23 may be provided with a screw threaded pivot 24 outwardly extending above it so that a lot of different types of propellers, as far as diameter and shape are concerned, can be mounted on it so as to get the best performance of the stirring unit with every kind of fluid to be mixed.
  • the stirring unit according to the present invention may advantageously be equipped with a supporting device suitable to make easier the removal of the unit, as schematically shown in figure 4.
  • the supporting device substantially comprises a base 25, preferably mounted on wheels 26 and tubular rod 27 extending vertically therefrom and housed within corresponding cylinders 28 and suitable to mutually slide by means of pneumatic actuation or the like. In this way the stirring unit, once disconnected from the container, may easily be lowered and moved.
  • the magnetic drive stirring unit according to the present invention allows to get significant advantages in comparison with the mechanic drive stirring units presently known.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • Accessories For Mixers (AREA)
EP89830408A 1988-09-23 1989-09-21 Unité d'agitation à entraînement magnétique Withdrawn EP0360767A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8809490A IT1225238B (it) 1988-09-23 1988-09-23 Gruppo di agitazione a trascinamento magnetico
IT949088 1988-09-23

Publications (1)

Publication Number Publication Date
EP0360767A1 true EP0360767A1 (fr) 1990-03-28

Family

ID=11130909

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89830408A Withdrawn EP0360767A1 (fr) 1988-09-23 1989-09-21 Unité d'agitation à entraînement magnétique

Country Status (2)

Country Link
EP (1) EP0360767A1 (fr)
IT (1) IT1225238B (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0599010A1 (fr) * 1992-10-01 1994-06-01 Mavag Verfahrenstechnik Ag Agitateur double pour remuer des liquides steriles
US5478149A (en) * 1995-04-24 1995-12-26 Magnetic Mixers, Inc. Magnetic mixer
US5758965A (en) * 1996-12-05 1998-06-02 General Signal Corporation Mixer system
US5779359A (en) * 1996-12-05 1998-07-14 General Signal Corporation Mixer having exposed clean-in-place bearing assemblies
US6065865A (en) * 1998-06-05 2000-05-23 Mixel Magnetically driven agitator with magnetic rotation detector
US6206562B1 (en) * 1998-01-28 2001-03-27 Mixel Agitator with adjustable magnetic drive coupling
DE10318599A1 (de) * 2003-04-24 2004-11-11 Mavag Verfahrenstechnik Ag Rührer zum Mischen, Homogenisieren und Dispergieren
CN109843424A (zh) * 2016-08-01 2019-06-04 捷特有限公司 模块化搅拌机构
IT201900019172A1 (it) * 2019-10-17 2020-01-17 Paolo Stemberger Agitatore elettromagnetico perfezionato
CN112871045A (zh) * 2021-01-18 2021-06-01 乐锐 一种分层搅拌混合机
CN114588849A (zh) * 2022-02-22 2022-06-07 兰州城市学院 一种水热法制备3d纳米花复合材料的方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2495895A (en) * 1945-10-31 1950-01-31 Universal Oil Prod Co Fluid circulating device
US2506886A (en) * 1948-04-19 1950-05-09 Automatic Magnetic Agitators L Magnetic drive agitator
US2810556A (en) * 1955-03-14 1957-10-22 Tormag Transmissions Ltd Agitators for fluid cooling tanks and the like
DE1294936B (de) * 1964-03-03 1969-05-14 Teikoku Denki Seisakusho Kk Ruehrvorrichtung
FR2164837A1 (fr) * 1971-12-22 1973-08-03 Nippon Steel Corp
GB2185862A (en) * 1985-12-11 1987-07-29 Chem Plant Stainless Limited Mixing vessel

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2495895A (en) * 1945-10-31 1950-01-31 Universal Oil Prod Co Fluid circulating device
US2506886A (en) * 1948-04-19 1950-05-09 Automatic Magnetic Agitators L Magnetic drive agitator
US2810556A (en) * 1955-03-14 1957-10-22 Tormag Transmissions Ltd Agitators for fluid cooling tanks and the like
DE1294936B (de) * 1964-03-03 1969-05-14 Teikoku Denki Seisakusho Kk Ruehrvorrichtung
FR2164837A1 (fr) * 1971-12-22 1973-08-03 Nippon Steel Corp
GB2185862A (en) * 1985-12-11 1987-07-29 Chem Plant Stainless Limited Mixing vessel

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0599010A1 (fr) * 1992-10-01 1994-06-01 Mavag Verfahrenstechnik Ag Agitateur double pour remuer des liquides steriles
US5407272A (en) * 1992-10-01 1995-04-18 Mavag Verfahrenstechnik Ag. Double impeller for stirring sterile liquids
US5478149A (en) * 1995-04-24 1995-12-26 Magnetic Mixers, Inc. Magnetic mixer
US5758965A (en) * 1996-12-05 1998-06-02 General Signal Corporation Mixer system
US5779359A (en) * 1996-12-05 1998-07-14 General Signal Corporation Mixer having exposed clean-in-place bearing assemblies
US6206562B1 (en) * 1998-01-28 2001-03-27 Mixel Agitator with adjustable magnetic drive coupling
US6065865A (en) * 1998-06-05 2000-05-23 Mixel Magnetically driven agitator with magnetic rotation detector
DE10318599A1 (de) * 2003-04-24 2004-11-11 Mavag Verfahrenstechnik Ag Rührer zum Mischen, Homogenisieren und Dispergieren
CN109843424A (zh) * 2016-08-01 2019-06-04 捷特有限公司 模块化搅拌机构
IT201900019172A1 (it) * 2019-10-17 2020-01-17 Paolo Stemberger Agitatore elettromagnetico perfezionato
CN112871045A (zh) * 2021-01-18 2021-06-01 乐锐 一种分层搅拌混合机
CN114588849A (zh) * 2022-02-22 2022-06-07 兰州城市学院 一种水热法制备3d纳米花复合材料的方法

Also Published As

Publication number Publication date
IT1225238B (it) 1990-11-02
IT8809490A0 (it) 1988-09-23

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