EP0154112B1 - Magnet-Rühreinrichtung - Google Patents

Magnet-Rühreinrichtung Download PDF

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Publication number
EP0154112B1
EP0154112B1 EP85100225A EP85100225A EP0154112B1 EP 0154112 B1 EP0154112 B1 EP 0154112B1 EP 85100225 A EP85100225 A EP 85100225A EP 85100225 A EP85100225 A EP 85100225A EP 0154112 B1 EP0154112 B1 EP 0154112B1
Authority
EP
European Patent Office
Prior art keywords
pole cores
pole
cores
conductor members
magnetic
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
Application number
EP85100225A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0154112A2 (de
EP0154112A3 (en
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
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 Individual filed Critical Individual
Publication of EP0154112A2 publication Critical patent/EP0154112A2/de
Publication of EP0154112A3 publication Critical patent/EP0154112A3/de
Application granted granted Critical
Publication of EP0154112B1 publication Critical patent/EP0154112B1/de
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 3 135 961.
  • 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 such that the magnetic winding system can be produced quickly and cheaply in a simple manner 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 which intersect and intersect in the spaces between the pole cores and in which a current flow can be generated in such a way that the The direction of current in adjacent pole gaps running longitudinally in the same direction is different and the current direction intermittently or periodically runs once in one group of conductor tracks lying in the same direction and then transversely in the other group is reversible in the same direction to each other conductor tracks.
  • the magnetic winding system does not have to be formed from individual magnetic coils that wrap around the pole cores, but can be produced by inserting elongated conductor tracks 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.
  • FIG. 1 shows a part of the base of the magnetic stirrer-forming base plate 1 made of ferromagnetic material, from which a multiplicity of pole cores 2 protrude, which are drawn in with a cylindrical shape in the illustration according to FIG. 1, in order 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.
  • elongated conductor tracks 3 to 8 and 9 to 14 are inserted in such a way that the conductor tracks 3 to 8 form a group of mutually parallel conductors in the unidirectional pole core spaces, while the conductors 9 to 14 form one form the former conductor crossing group of mutually parallel conductor tracks in the transverse pole core spaces.
  • the conductor tracks 3 to 14 are now wired and can be supplied with current such that, as indicated by arrows in FIG. 1, the current direction in the conductors within one pole core gap is opposite to the current direction in the conductors of the adjacent, parallel pole core gap, which is for both the longitudinal conductor tracks of one group as well as the transverse conductor tracks of the other group of conductors.
  • 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.
  • pole shoe 17 which also supports his arms in the direction of the four neighboring stirring point centers. While a pole shoe arrangement is shown in the illustration in FIG. 1, which is located essentially in the plane of the upper ends of the pole cores 2, the pole shoes 17 are practically preferably starting from their fastening points at the upper ends of the pole cores 2, first upwards and then in bent a horizontal plane, which is essentially in the plane of Base 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.
  • Four such auxiliary pole cores are arranged around a center of the tube, 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 that 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. 1. It should be noted that, for reasons of greater clarity, only reel poles 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 of all 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 of large circumference is parallel Intermediate pole core in a continuous wavy line and the other side of the coil runs through the interpole in a continuous wavy line mirrored to this
  • 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 of the type of the coil loops 19a to 19c and 20a to 20c are stacked one on top of the other .
  • FIG. 3 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 an alternating sense of winding results in mutually parallel elongated coils. Also in the magnetic winding system according to FIG. 3, the arrangement is such that the individual elongated coils at the ends protrude beyond the wrapped pole core row in question, as indicated in FIG. 3 at 21 and 22. 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 spaces 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 which stand upright in the interstices between the pole cores and which, for example, consist of copper or aluminum, in the latter case a very high-quality thin one Insulation can be attached to the conductor strips using an oxide layer.
  • 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 stirring device, 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 are fastened to the base plate 1 at the corners of a square corresponding to the pole core cross section.
  • pole shoe plates can be fastened in the manner of the pole shoe plate 23 according to FIG. 4.
  • the conductor tracks are inserted into the interstices of the pole cores in a plurality of layers crossing one another.
  • 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, in such a way 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 wave-like manner between the rows of openings 29. If there 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 rotated relative to one another on the pole cores 2, as can be seen in FIG. 6 is.

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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 Magnet-Rühreinrichtung Expired EP0154112B1 (de)

Applications Claiming Priority (2)

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

Publications (3)

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

Family

ID=6224690

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85100225A Expired EP0154112B1 (de) 1984-01-11 1985-01-11 Magnet-Rühreinrichtung

Country Status (2)

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

Families Citing this family (2)

* 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
WO1998006485A1 (en) * 1996-08-09 1998-02-19 Genex Limited Agitation apparatus

Family Cites Families (8)

* 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
DE2215798B2 (de) * 1972-03-30 1975-12-18 Internationale Laboratoriums-Apparate Gmbh, 7801 Ballrechten-Dottingen Magnetrührgerät
DE2945269A1 (de) * 1979-11-09 1981-05-21 Teldix Gmbh, 6900 Heidelberg Positionierungseinrichtung fuer einen koerper
DE3135961A1 (de) * 1981-09-10 1983-03-17 Helmut Dipl.-Ing. 8990 Lindau Herz Magnet-ruehreinrichtung
EP0052324B1 (de) * 1980-11-17 1986-03-05 Helmut Dipl.-Ing. Herz Magnet-Rühreinrichtung
DE3106175A1 (de) * 1981-02-19 1982-09-09 Helmut Dipl.-Ing. 8990 Lindau Herz Magnet-ruehreinrichtung

Also Published As

Publication number Publication date
EP0154112A2 (de) 1985-09-11
DE3400724C2 (enrdf_load_stackoverflow) 1992-09-03
DE3400724A1 (de) 1985-07-18
EP0154112A3 (en) 1986-05-07

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