EP0154112A2 - Dispositif agitateur magnétique - Google Patents

Dispositif agitateur magnétique Download PDF

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Publication number
EP0154112A2
EP0154112A2 EP85100225A EP85100225A EP0154112A2 EP 0154112 A2 EP0154112 A2 EP 0154112A2 EP 85100225 A EP85100225 A EP 85100225A EP 85100225 A EP85100225 A EP 85100225A EP 0154112 A2 EP0154112 A2 EP 0154112A2
Authority
EP
European Patent Office
Prior art keywords
pole
pole cores
conductor tracks
magnetic
cores
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
EP85100225A
Other languages
German (de)
English (en)
Other versions
EP0154112A3 (en
EP0154112B1 (fr
Inventor
Helmut Dipl.-Ing. Herz
Klaus Dipl.-Ing. Kaufmann
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0154112A2 publication Critical patent/EP0154112A2/fr
Publication of EP0154112A3 publication Critical patent/EP0154112A3/de
Application granted granted Critical
Publication of EP0154112B1 publication Critical patent/EP0154112B1/fr
Expired legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D5/00—Construction of single parts, e.g. the parts for attachment
    • E05D5/02—Parts for attachment, e.g. flaps
    • 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
    • B01F33/452—Magnetic mixers; Mixers with magnetically driven stirrers using independent floating stirring elements
    • 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
    • B01F35/20—Measuring; Control or regulation

Definitions

  • the invention relates to a magnetic stirring device with a base containing a magnetic winding system, on each of which a magnetic stirring rod and the vessels to be stirred, made of non-magnetic material, can be placed in the region of a plurality of stirring points.
  • Magnetic stirring devices of this type are known for example from German Offenlegungsschrift 31 35 961.
  • the magnetic winding system of the known magnetic stirring devices of the type just mentioned contains a large number of magnetic coils surrounding each pole core, which are wired in such a way and can be supplied with current that magnetic rotating fields are generated in the area of the stirring points above the surface of the base, which are generated with the stirring rod interact and set the stir bar in rotation.
  • the object of the invention is to achieve a magnetic stirring device of the type briefly described at the beginning. that the magnetic winding system can be manufactured quickly and cheaply and is also suitable for miniaturization.
  • the above-mentioned object is achieved in that a plurality of stirring points are achieved in that the magnetic winding system is formed by elongated conductor tracks that intersect and intersect in the spaces between the pole cores and intersect with one another.
  • the magnetic winding system does not have to be formed from individual magnetic coils wrapping around the pole cores, but rather by inserting elongated conductors lanes can be produced that only need to be wired or connected outside the arrangement of the pole cores.
  • a complete current-carrying turn around a pole core is composed of four conductor sections which run past this pole core on the four sides of a pole core, which projects from a base plate forming the magnetic yoke.
  • Figure 1 shows a part of the base of the magnetic stirring device forming base plate 1 made of ferromagnetic material, from which a plurality of pole cores 2 protrudes, which are shown in the illustration of Figure 1 with a cylindrical shape to improve the clarity of the illustration.
  • pole cores are used which have a prismatic shape, as is shown, for example, in FIGS. 4 to 6.
  • pole cores 2 are located at the crossover points of a square grid of groups of grid lines parallel to one another that cross over one another.
  • design principles given here can also be applied to pole core arrangements in which the pole cores protrude at the crossover points of rectangular grids or parallelogram grids or trapezoid grids.
  • the current direction in the conductors within a pole core gap is opposite to the current direction in the conductors of the adjacent, parallel pole core gap, which is both applies to the longitudinal conductor tracks of one group as well as to the transverse conductor tracks of the other conductor group. Furthermore, the current direction is alternately reversible in one conductor group and then in the other conductor group. This can be done intermittently by loading both conductor groups with rectangular wave-shaped supply voltages with a corresponding phase shift, or continuously by applying two phase waves to the two groups of conductor tracks with sine-wave-shaped supply voltages.
  • a south pole or a north pole thus forms at the upper ends of the pole cores mentioned, as shown in FIG. 1.
  • a vessel 15 made of non-magnetic material with a liquid to be stirred therein and a magnetic stirring rod 16 in the vessel is placed on the stirring point R, the magnetic field above the pole cores 2, which progressively progresses in the direction of rotation, causes the stirring rod 16 to be within the position stirring liquid in the vessel 15 is rotated.
  • An improvement in the field distribution above the pole cores 2 is achieved by attaching pole shoes 17, indicated by dash-dotted lines in FIG. 1, which extend from the upper ends of the pole cores 2 to the center of the stirring points R. After, apart from the pole cores at the corners; Each pole core belongs to several stirring points, the pole shoes 17 are generally multi-armed, so that the pole core 2 shown in the center of the illustration in FIG.
  • pole shoe 17 which has its arms towards the four neighboring stirring point centers While a pole shoe arrangement is shown in the illustration of FIG. 1, which is located substantially in the plane of the upper ends of the pole cores 2, the pole shoes 17 are practically preferably bent upwards from their fastening points at the upper ends of the pole cores 2 and then bent into a horizontal plane which is essentially in the plane of the base top side is located on which the vessels 15 are placed. In this way, not only is an improved field concentration in the area of the stirring points R achieved, but there is also an enlargement of the space for inserting the conductor tracks into the interstices of the pole cores.
  • auxiliary pole cores 18 which protrude from the base plate 1 in the spaces between the pole cores 2.
  • auxiliary pole cores are arranged around a stirring point center, each of which is located essentially in the middle of the pole core spaces and, in the direction of the longitudinal extension of the pole core spaces, has a cross-sectional dimension which is essentially the same as the corresponding dimensions of the pole cores. In this way it is achieved that the conductor tracks can be guided past the auxiliary pole cores 18 without undergoing a bend, as is readily apparent from the illustration in FIG. It should be noted that, for reasons of greater clarity, only auxiliary pole cores are shown in FIG. 1 only grouped around two stirring points.
  • two coils of large circumference consisting of a number of turns are first produced, one of which is used to form a group of conductors running in parallel, while the other coil is used to form the conductor tracks running transversely thereto.
  • one coil is designated by 19 and is indicated schematically in a solid line, while the other coil is designated by 20 and is symbolized by a broken line.
  • individual coil loops 19a, 19b and 19c are first braided around the rows of pole cores from one of these coils, so that the individual coil loops each wrap around a row of pole cores and an arrangement is obtained in which one coil side of the coil largely runs through the parallel pole core spaces in a continuous wavy line and the other side of the coil runs through the pole core spaces in a mirror-image continuous wavy line.
  • the coil 20 is then moved in a corresponding manner with the formation of coil loops 20a, 20b and 20c, which loop around the pole core rows which run perpendicular to the former pole core rows. It should be noted that in order to fill the available winding space in the spaces between the rows of pole cores, the manufacturing process explained with reference to FIG. 2 can be repeated several times, so that several groups of coil loops are stacked on top of one another in the manner of the coil loops 19a to 19c and 20a to 20c will.
  • Another possibility of producing the magnetic winding system provides, according to FIG. 3, that individual elongated coils are wound, which are then pushed in groups which cross one another over the rows of pole cores and are wired in such a way that elongated ones run parallel to one another Coils results in a changing direction of winding. Also, in the magnetic winding system according to Figure 3, the arrangement is such that the individual elongated coils protrude at the ends over the respective looped olkern réelle P, as indicated in Figure 3 at 21 and 22nd The influence of this design feature has been discussed above.
  • FIG. 4 shows a perspective view of a section of the base of a magnetic stirring device in the region of a pole core 2, which here has a square cross section and in turn protrudes from a ferromagnetic base plate 1.
  • a corresponding plurality of pole cores 2 are provided, which protrude from the crossover points of a square grid, the gaps between the pole cores 2 having dimensions which are comparable to those of the pole core cross section.
  • the conductor tracks have the shape of thin conductor strips standing upright in the interstices between the pole cores, which, for example, consist of copper or aluminum, in the latter case a very high-quality thin insulation an oxide layer can be applied to the conductor strips.
  • the conductor tapes are provided with transverse incisions reaching to the middle, with care being taken, of course, by appropriate insulation that no short circuits occur in the region of the crossovers of the conductor tapes. In this way, a base with a low overall height and an optimal use of the space between the pole cores 2 for accommodating the winding is obtained.
  • Pole shoe plates 23 are attached to the upper ends of the pole cores 2, which are approximately square in shape when viewed from above and carry pole shoe extensions 24 at the corners, which are initially bent upwards from the pole shoe plate 23 and then bent horizontally.
  • the pole shoe lugs 24 extend with their outer ends close to the stirring point centers.
  • the individual pole cores 2 are solid, in certain cases it may be expedient to improve and equalize the rotating field above the surface of the base of the magnetic stirrer, an accumulation of ferromagnetic material in the area of the upper ends of the pole cores 2 to avoid.
  • the upper ends of the pole cores 2 are provided with a conical countersink, so that in the case of a square cross section of the pole cores 2, pole core elements which run diagonally upward in the corner region remain, which form the magnetic field lines Lead diagonally upwards from the lower area of the pole core to the pole shoe arms, which then direct the field lines towards the stirring point centers.
  • the individual pole cores 2 consist of four pin-like pole core elements 2a, 2b, 2c and 2d which protrude at the corners of a square corresponding to the pole core cross section and are each fastened to the base plate 1.
  • pole shoe plates can each be fastened in the manner of the pole shoe plate 23 according to FIG. 4.
  • the conductor tracks are inserted in a number of intersecting layers, the pole core spaces.
  • FIG. 6 shows an embodiment of the base of the magnetic stirring device of the construction specified here, in which a multiplicity of prismatic pole cores 2 with a square cross section protrude from a base plate 1 made of ferromagnetic material and serving as a magnetic yoke the crossing points of a regular grid in the above-mentioned manner.
  • the magnetic winding system is formed by a number of stacked, insulated circuit carrier plates 25, 26, 27 and 28, which are provided with bridges 29, which are aligned with one another in the different circuit carrier plates and serve to receive the pole cores 2.
  • Conductor tracks are produced on the individual circuit carrier boards in the manner of printed circuits, whereby according to an embodiment not shown in FIG.
  • the circuit carrier boards can each be provided with conductor tracks on both sides, such that complete elongated coils, each wrapping around the rows of pole cores, form on a circuit carrier board, as is the case with Arrangement according to Figures 2 and 3 corresponds.
  • intermediate insulation layers are to be provided between the individual circuit carrier plates, which are indicated schematically in FIG. 6 at 30 and with which it is prevented that conductor tracks on the mutually facing sides of the circuit carrier plates form a short circuit.
  • the circuit carrier plates 25 to 28 are each provided on one side with conductor tracks which run in a wavy line between the rows of openings 29. If it is a square arrangement of pole cores 2 on a square grid, one and the same components can be used to form the circuit carrier plates 25 to 28, which are stacked on the pole cores 2 rotated relative to each other. as can be seen easily from FIG. 6.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Continuous Casting (AREA)
  • Coils Or Transformers For Communication (AREA)
EP85100225A 1984-01-11 1985-01-11 Dispositif agitateur magnétique Expired EP0154112B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843400724 DE3400724A1 (de) 1984-01-11 1984-01-11 Magnet-ruehreinrichtung
DE3400724 1984-01-11

Publications (3)

Publication Number Publication Date
EP0154112A2 true EP0154112A2 (fr) 1985-09-11
EP0154112A3 EP0154112A3 (en) 1986-05-07
EP0154112B1 EP0154112B1 (fr) 1988-08-10

Family

ID=6224690

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85100225A Expired EP0154112B1 (fr) 1984-01-11 1985-01-11 Dispositif agitateur magnétique

Country Status (2)

Country Link
EP (1) EP0154112B1 (fr)
DE (1) DE3400724A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998006485A1 (fr) * 1996-08-09 1998-02-19 Genex Limited Appareil agitateur

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4440250B4 (de) * 1994-11-10 2006-12-21 WTW Wissenschaftlich-Technische Werkstätten GmbH & Co. KG Meßwerterfassungsvorrichtung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE394212C (de) * 1922-03-03 1925-01-23 Aeg Aus einer Anzahl parallelgeschalteter ueberkreuzter Teilstaebe bestehender Wicklungstab
DE1457328A1 (de) * 1965-11-22 1969-10-23 Abe Hershler Verfahren und Vorrichtung zum Ruehren und Bewegen von stroemungsfaehigen Medien
DE2215798A1 (de) * 1972-03-30 1973-10-11 Int Labor Apparate Gmbh Magnetruehrgeraet
US3786325A (en) * 1970-09-14 1974-01-15 Ass Biomedic Syst Inc Electronic motorless stirrer
DE2945269A1 (de) * 1979-11-09 1981-05-21 Teldix Gmbh, 6900 Heidelberg Positionierungseinrichtung fuer einen koerper
EP0052324A2 (fr) * 1980-11-17 1982-05-26 Helmut Dipl.-Ing. Herz Mélangeur magnétique
DE3106175A1 (de) * 1981-02-19 1982-09-09 Helmut Dipl.-Ing. 8990 Lindau Herz Magnet-ruehreinrichtung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3135961A1 (de) * 1981-09-10 1983-03-17 Helmut Dipl.-Ing. 8990 Lindau Herz Magnet-ruehreinrichtung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE394212C (de) * 1922-03-03 1925-01-23 Aeg Aus einer Anzahl parallelgeschalteter ueberkreuzter Teilstaebe bestehender Wicklungstab
DE1457328A1 (de) * 1965-11-22 1969-10-23 Abe Hershler Verfahren und Vorrichtung zum Ruehren und Bewegen von stroemungsfaehigen Medien
US3786325A (en) * 1970-09-14 1974-01-15 Ass Biomedic Syst Inc Electronic motorless stirrer
DE2215798A1 (de) * 1972-03-30 1973-10-11 Int Labor Apparate Gmbh Magnetruehrgeraet
DE2945269A1 (de) * 1979-11-09 1981-05-21 Teldix Gmbh, 6900 Heidelberg Positionierungseinrichtung fuer einen koerper
EP0052324A2 (fr) * 1980-11-17 1982-05-26 Helmut Dipl.-Ing. Herz Mélangeur magnétique
DE3106175A1 (de) * 1981-02-19 1982-09-09 Helmut Dipl.-Ing. 8990 Lindau Herz Magnet-ruehreinrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998006485A1 (fr) * 1996-08-09 1998-02-19 Genex Limited Appareil agitateur

Also Published As

Publication number Publication date
DE3400724A1 (de) 1985-07-18
EP0154112A3 (en) 1986-05-07
DE3400724C2 (fr) 1992-09-03
EP0154112B1 (fr) 1988-08-10

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