EP2714257B1 - Stirring device comprising a stirring tool and a drive motor - Google Patents

Stirring device comprising a stirring tool and a drive motor Download PDF

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Publication number
EP2714257B1
EP2714257B1 EP12712957.5A EP12712957A EP2714257B1 EP 2714257 B1 EP2714257 B1 EP 2714257B1 EP 12712957 A EP12712957 A EP 12712957A EP 2714257 B1 EP2714257 B1 EP 2714257B1
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EP
European Patent Office
Prior art keywords
drive motor
sensor
stirring
stirring device
imbalance
Prior art date
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Active
Application number
EP12712957.5A
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German (de)
French (fr)
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EP2714257A1 (en
EP2714257B2 (en
Inventor
Erhard Eble
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.)
IKA Werke GmbH and Co KG
Original Assignee
IKA Werke GmbH and Co KG
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Filing date
Publication date
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Application filed by IKA Werke GmbH and Co KG filed Critical IKA Werke GmbH and Co KG
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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
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
    • B01F35/32—Driving arrangements
    • B01F35/32005—Type of drive
    • B01F35/3204—Motor driven, i.e. by means of an electric or IC motor
    • 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
    • B01F33/50—Movable or transportable mixing devices or plants
    • B01F33/501—Movable mixing devices, i.e. readily shifted or displaced from one place to another, e.g. portable during use
    • B01F33/5011—Movable mixing devices, i.e. readily shifted or displaced from one place to another, e.g. portable during use portable during use, e.g. hand-held
    • 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
    • B01F33/86—Mixing heads comprising a driven stirrer
    • 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
    • B01F35/21—Measuring
    • B01F35/212—Measuring of the driving system data, e.g. torque, speed or power data
    • 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
    • B01F35/22—Control or regulation
    • B01F35/221—Control or regulation of operational parameters, e.g. level of material in the mixer, temperature or pressure
    • B01F35/2214—Speed during the operation
    • B01F35/22142—Speed of the mixing device during the operation
    • B01F35/221422—Speed of rotation of the mixing axis, stirrer or receptacle during the operation
    • 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
    • B01F35/60—Safety arrangements
    • B01F35/605—Safety devices concerning the operation of the mixer

Definitions

  • the invention relates to a stirring device according to the preamble of claim 1.
  • a stirring device is known from EP 1835559 A1 known.
  • stirrers are also from the GB 2122396 A . US 6155113 A . US 4142804 A . EP 0124383 A1 and US 4606648 A known. Above all, such stirrers for laboratory use are often attached to a tripod, but such stirrers are also known with another associated holder or storage.
  • the invention provides to propose a stirring device according to claim 1.
  • the sensor is arranged on a control board serving for the control. Thereby, the sensor can be directly included in the corresponding circuit and connected to this.
  • an expedient embodiment may be that the unbalance-responsive sensor is an acceleration sensor.
  • Acceleration sensors are known per se and can be purchased inexpensively and mounted in a simple manner on or in the stirrer.
  • the senor is provided with an audible and / or optical display or signaling device or controls such.
  • the user of the mixer can be warned acoustically or visually, if too much imbalance should occur.
  • the unbalance-responsive sensor is connected to the control of the drive motor and changes the speed of the drive motor when a limit value is exceeded, namely reduced or increased, or switches off the drive motor.
  • An expedient embodiment, in particular of the sensor, can provide that it is piezobased or inductively formed with a plunger coil or by means of a deflectable mass or by means of strain gauges. Sensors designed in this way have proved useful in detecting imbalances or vibrations, so that a corresponding use for the stirring device according to the invention represents an inexpensive solution.
  • An agitator is intended to be stirred with a stirring tool that can be introduced into a mass or liquid.
  • the stirring tool can be coupled with a chuck 2, which in turn is connected via a shaft 3 with a drive motor 4, so that after inserting a stirring tool in the chuck 2 by switching this drive motor 4 can be stirred.
  • the drive motor 4 is housed in a housing 5 enclosing it, on which outside an attachment point 6 is provided for fixing the stirring device 1 in the position of use. It can be seen in the embodiment on the rear wall 7 of the housing 5 as an attachment point 6 a provided with a fastening screw 8 console 9, which allows plugging the mixer 1 with this attachment point 6 on a horizontal arm 61 of a tripod.
  • an unbalance responsive sensor 11 or a vibration sensor 11 is provided on an arranged in the housing 5 of the stirring device 1 printed circuit board 10.
  • This is inventively arranged at the for the control or regulation of the drive motor 4.
  • this can be arranged on a serving for the power supply of the drive motor 4 circuit board 10 and integrated into the circuit.
  • the sensor 11 may be piezobased or inductively formed with a plunger coil or by means of a deflectable mass or by means of strain gauges and, for example, be commercially available. It should be mentioned that, if appropriate, more than one sensor 11 could also be provided.
  • the stirrer 1 with a stir-in to be stirred mass or liquid agitator, with a stirring tool driving drive motor 4, with a drive motor 4 enclosing the housing 5 and with an attachment point 6 for fixing the stirrer 1 in the use position has at least one unbalance responsive sensor 11, which is preferably connected to the control or regulation of the drive motor 4 or interconnected and unwanted or dangerous vibrations or vibrations Turn off the drive motor 4 or change its speed.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Accessories For Mixers (AREA)
  • Devices For Use In Laboratory Experiments (AREA)

Description

Die Erfindung betrifft ein Rührgerät gemäß dem Oberbegriff von Anspruch 1. Ein derartiges Rührgerät ist aus der EP 1835559 A1 bekannt.The invention relates to a stirring device according to the preamble of claim 1. Such a stirring device is known from EP 1835559 A1 known.

Derartige Rührgeräte sind auch aus der GB 2122396 A , US 6155113 A , US 4142804 A , EP 0124383 A1 und US 4606648 A bekannt. Vor allem werden derartige Rührgeräte für den Laborbedarf häufig an einem Stativ befestigt, jedoch sind auch derartige Rührgeräte mit einer anderen ihnen zugeordneten Halterung oder Lagerung bekannt.Such stirrers are also from the GB 2122396 A . US 6155113 A . US 4142804 A . EP 0124383 A1 and US 4606648 A known. Above all, such stirrers for laboratory use are often attached to a tripod, but such stirrers are also known with another associated holder or storage.

Häufig ist die aus dem Gehäuse des Rührgerätes austretende Welle des Rührwerkzeugs relativ lang und das Rührwerkzeug ist in der Regel fliegend gelagert. Dies kann je nach Rührgut und zu rührender Masse und je nach Fertigungstoleranzen zu Vibrationen oder zu einer Unwucht an den rotierenden Teilen und insbesondere auch an dem Rührwerkzeug führen, was vor allem bei relativ langen Wellen oder Rührschäften vor allem dann gefährlich werden kann, wenn das Rührwerkzeug in ein Glasgefäß eintaucht. Durch Unwucht kann es dazu kommen, dass das Glasgefäß von dem Rührwerkzeug innenseitig berührt und gegebenenfalls sogar zerstört wird.Often the emerging from the housing of the agitator shaft of the stirring tool is relatively long and the stirring tool is usually stored on the fly. Depending on the material to be stirred and the mass to be stirred and the manufacturing tolerances, this can lead to vibrations or imbalance on the rotating parts and, in particular, on the stirring tool, which can be dangerous especially in the case of relatively long shafts or stirring shafts, especially if the stirring tool immersed in a glass jar. Imbalance can cause the glass vessel to be touched on the inside by the stirring tool and possibly even destroyed.

Es besteht deshalb die Aufgabe, ein Rührgerät der eingangs definierten Art zu schaffen, bei welchem die Gefahr einer Beschädigung oder Zerstörung von an dem Rührvorgang beteiligten Teilen vermindert oder vermieden wird.There is therefore the object to provide a stirrer of the type defined, in which the risk of damage or destruction of parts involved in the stirring parts is reduced or avoided.

Zur Lösung dieser Aufgabe ist erfindungsgemäß vorgesehen, ein Rührgerät gemäß Anspruch 1 vorzuschlagen.To solve this problem, the invention provides to propose a stirring device according to claim 1.

Dadurch ist es möglich, an dem Rührgerät auftretende Vibrationen oder Unwucht rechtzeitig zu erkennen und Abhilfe vorzusehen. Der Sensor ist an einer für die Steuerung dienenden Leiterplatte angeordnet. Dadurch kann der Sensor unmittelbar in den entsprechenden Stromkreis einbezogen und an diesen angeschlossen sein.This makes it possible to detect occurring vibrations or imbalance on the mixer in good time and provide a remedy. The sensor is arranged on a control board serving for the control. Thereby, the sensor can be directly included in the corresponding circuit and connected to this.

Eine zweckmäßige Ausführungsform kann dabei darin bestehen, dass der auf Unwucht ansprechende Sensor ein Beschleunigungssensor ist. Beschleunigungssensoren sind an sich bekannt und können preiswert bezogen und auf einfache Weise an oder in dem Rührgerät angebracht werden.An expedient embodiment may be that the unbalance-responsive sensor is an acceleration sensor. Acceleration sensors are known per se and can be purchased inexpensively and mounted in a simple manner on or in the stirrer.

Es kann zweckmäßig sein, wenn der Sensor mit einer akustischen und/oder optischen Anzeige- oder Signaleinrichtung versehen ist oder eine solche ansteuert. Somit kann der Benutzer des Rührgerätes akustisch oder optisch gewarnt werden, wenn eine zu große Unwucht auftreten sollte.It may be expedient if the sensor is provided with an audible and / or optical display or signaling device or controls such. Thus, the user of the mixer can be warned acoustically or visually, if too much imbalance should occur.

Besonders günstig ist es, wenn der auf Unwucht ansprechende Sensor mit der Steuerung des Antriebsmotors verbunden ist und bei Überschreiten eines Grenzwertes die Drehzahl des Antriebsmotors ändert, nämlich vermindert oder erhöht, oder den Antriebsmotor abschaltet. Somit kann durch eine derartige Ausgestaltung eine automatische Verhinderung oder auch Beseitigung von Schäden durch Unwucht erzielt werden.It is particularly advantageous if the unbalance-responsive sensor is connected to the control of the drive motor and changes the speed of the drive motor when a limit value is exceeded, namely reduced or increased, or switches off the drive motor. Thus, by such a configuration, an automatic prevention or elimination of damage can be achieved by imbalance.

Eine zweckmäßige Ausführung insbesondere des Sensors kann vorsehen, dass dieser piezobasiert oder induktiv mit Tauchspule oder mittels auslenkbarer Masse oder mittels Dehnmessstreifen ausgebildet ist. Derartig gestaltete Sensoren haben sich bei der Erkennung von Unwucht oder von Vibrationen bewährt, so dass eine entsprechende Verwendung für das erfindungsgemäße Rührgerät eine preiswerte Lösung darstellt.An expedient embodiment, in particular of the sensor, can provide that it is piezobased or inductively formed with a plunger coil or by means of a deflectable mass or by means of strain gauges. Sensors designed in this way have proved useful in detecting imbalances or vibrations, so that a corresponding use for the stirring device according to the invention represents an inexpensive solution.

Vor allem bei Kombination einzelner oder mehrerer der vorbeschriebenen Merkmale und Maßnahmen ergibt sich ein Rührgerät, bei welchem die Folgen von Vibrationen oder von Unwucht rechtzeitig erkannt und dadurch gemildert oder vermieden werden können.Especially when combining one or more of the features and measures described above results in a stirrer in which the consequences of vibration or imbalance can be detected in good time and thereby mitigated or avoided.

Nachstehend ist ein Ausführungsbeispiel der Erfindung anhand der Zeichnung näher beschrieben. Es zeigt in zum Teil schematisierter Darstellung:

Fig. 1
eine Vorderansicht,
Fig. 2
eine teilweise im Längsschnitt gehaltene Seitenansicht,
Fig. 3
eine Rückansicht und
Fig. 4
eine Draufsicht eines erfindungsgemäßen Rührgeräts mit einem ein nicht dargestelltes beziehungsweise nicht angekuppeltes Rührwerkzeug antreibenden Antriebsmotor.
An embodiment of the invention will be described in more detail below with reference to the drawing. It shows in partly schematized representation:
Fig. 1
a front view,
Fig. 2
a partially longitudinal sectioned side view,
Fig. 3
a rear view and
Fig. 4
a top view of a stirring device according to the invention with a not shown or not hitched agitator driving drive motor.

Ein im Ganzen mit 1 bezeichnetes Rührgerät ist dazu vorgesehen, mit einem in eine Masse oder Flüssigkeit einbringbaren Rührwerkzeug diese zu rühren. Das Rührwerkzeug ist dabei mit einem Spannfutter 2 kuppelbar, welches seinerseits über eine Welle 3 mit einem Antriebsmotor 4 verbunden ist, so dass nach dem Einsetzen eines Rührwerkzeugs in das Spannfutter 2 durch Einschalten dieses Antriebsmotors 4 gerührt werden kann.An agitator, generally designated 1, is intended to be stirred with a stirring tool that can be introduced into a mass or liquid. The stirring tool can be coupled with a chuck 2, which in turn is connected via a shaft 3 with a drive motor 4, so that after inserting a stirring tool in the chuck 2 by switching this drive motor 4 can be stirred.

Der Antriebsmotor 4 ist in einem ihn umschließenden Gehäuse 5 untergebracht, an welchem außenseitig eine Befestigungsstelle 6 zum Festlegen des Rührgeräts 1 in Gebrauchsstellung vorgesehen ist. Man erkennt im Ausführungsbeispiel an der Rückwand 7 des Gehäuses 5 als Befestigungsstelle 6 eine mit einer Befestigungsschraube 8 versehene Konsole 9, die ein Aufstecken des Rührgerätes 1 mit dieser Befestigungsstelle 6 auf einen horizontalen Ausleger 61 eines Stativs ermöglicht.The drive motor 4 is housed in a housing 5 enclosing it, on which outside an attachment point 6 is provided for fixing the stirring device 1 in the position of use. It can be seen in the embodiment on the rear wall 7 of the housing 5 as an attachment point 6 a provided with a fastening screw 8 console 9, which allows plugging the mixer 1 with this attachment point 6 on a horizontal arm 61 of a tripod.

Vor allem wenn eine relativ lange Rührwerkswelle an dem Spannfutter 2 befestigt wird und/oder wenn relativ großzügige Fertigungstoleranzen vorliegen, kann es zu einer Unwucht des Rührwerkzeugs und seiner Welle und dadurch zu Schwingungen und Vibrationen an und in dem Rührgerät 1 kommen.Especially if a relatively long agitator shaft on the Chuck 2 is attached and / or if there are relatively large manufacturing tolerances, it can lead to an imbalance of the stirring tool and its shaft and thereby vibrations and vibrations on and in the mixer 1.

Um solche unerwünschten Erscheinungen rechtzeitig erkennen zu können, ist gemäß Fig. 2 an einer in dem Gehäuse 5 des Rührgeräts 1 angeordneten Leiterplatte 10 ein auf Unwucht ansprechender Sensor 11 oder ein Vibrationssensor 11 vorgesehen. Dieser ist erfindungsgemäß an der für die Steuerung oder Regelung des Antriebsmotors 4 angeordnet. Alternativ kann dieser an einer für die Stromversorgung des Antriebsmotors 4 dienenden Leiterplatte 10 angeordnet und in die Schaltung integriert sein.In order to detect such unwanted phenomena in a timely manner, is in accordance with Fig. 2 On an arranged in the housing 5 of the stirring device 1 printed circuit board 10, an unbalance responsive sensor 11 or a vibration sensor 11 is provided. This is inventively arranged at the for the control or regulation of the drive motor 4. Alternatively, this can be arranged on a serving for the power supply of the drive motor 4 circuit board 10 and integrated into the circuit.

An der Rückwand 7 erkennt man noch eine Schnittstelle 12 und ein Kabel 13 für die Energie- oder Stromzufuhr, und ferner innenseitig Leitungen 14 zu der Leiterplatte 10.On the rear wall 7 can be seen still an interface 12 and a cable 13 for the power or power supply, and also inside lines 14 to the circuit board 10th

Der Sensor 11 kann piezobasiert oder induktiv mit Tauchspule oder mittels auslenkbarer Masse oder mittels Dehnmessstreifen ausgebildet und beispielsweise handelsüblich sein. Es sei noch erwähnt, dass gegebenenfalls auch mehr als ein Sensor 11 vorgesehen sein könnte.The sensor 11 may be piezobased or inductively formed with a plunger coil or by means of a deflectable mass or by means of strain gauges and, for example, be commercially available. It should be mentioned that, if appropriate, more than one sensor 11 could also be provided.

Das Rührgerät 1 mit einem in eine zu rührende Masse oder Flüssigkeit einbringbaren Rührwerkzeug, mit einem das Rührwerkzeug antreibenden Antriebsmotor 4, mit einem den Antriebsmotor 4 umschließenden Gehäuse 5 und mit einer Befestigungsstelle 6 zum Festlegen des Rührgeräts 1 in Gebrauchsstellung weist wenigstens einen auf Unwucht ansprechenden Sensor 11 auf, der bevorzugt mit der Steuerung oder der Regelung des Antriebsmotors 4 verbunden oder verschaltet ist und bei unerwünschten oder gefährlichen Schwingungen oder Vibrationen den Antriebsmotor 4 ausschalten oder seine Drehzahl verändern kann.The stirrer 1 with a stir-in to be stirred mass or liquid agitator, with a stirring tool driving drive motor 4, with a drive motor 4 enclosing the housing 5 and with an attachment point 6 for fixing the stirrer 1 in the use position has at least one unbalance responsive sensor 11, which is preferably connected to the control or regulation of the drive motor 4 or interconnected and unwanted or dangerous vibrations or vibrations Turn off the drive motor 4 or change its speed.

Claims (5)

  1. Stirring device (1) having a stirring tool which can be introduced into a mass or liquid to be stirred, having a drive motor (4) driving the stirring tool, having a housing surrounding the drive motor (4), and having a sensor (11) responding to imbalance, characterised in that the stirring device (1) has a fastening point (6) for fixing the stirring device (1) in the usage position, and that the sensor (11) is disposed on a printed circuit board (10) serving to control the drive motor (4).
  2. Stirring device as claimed in claim 1, characterised in that the sensor responding to imbalance is an acceleration sensor.
  3. Stirring device as claimed in claim 1 or 2, characterised in that the sensor (11) is provided with an acoustic and/or optical display device or signalling device or actuates such a device.
  4. Stirring device as claimed in any one of claims 1 to 3, characterised in that the sensor (11) responding to imbalance is connected to the control or regulating means of the drive motor (4) and, when a limit value is exceeded, changes the speed of the drive motor (4), specifically reduces or increases it, or switches off the drive motor (4).
  5. Stirring device as claimed in any one of the preceding claims, characterised in that the sensor (11) is formed in a piezo-based manner or inductively with a plunger coil or by means of a deflectable mass or by means of a strain gauge.
EP12712957.5A 2011-05-27 2012-03-28 Stirring device comprising a stirring tool and a drive motor Active EP2714257B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011102606A DE102011102606A1 (en) 2011-05-27 2011-05-27 Stirrer with a stirring tool and with a drive motor
PCT/EP2012/001367 WO2012163444A1 (en) 2011-05-27 2012-03-28 Stirring device comprising a stirring tool and a drive motor

Publications (3)

Publication Number Publication Date
EP2714257A1 EP2714257A1 (en) 2014-04-09
EP2714257B1 true EP2714257B1 (en) 2015-09-02
EP2714257B2 EP2714257B2 (en) 2018-09-05

Family

ID=45937214

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12712957.5A Active EP2714257B2 (en) 2011-05-27 2012-03-28 Stirring device comprising a stirring tool and a drive motor

Country Status (5)

Country Link
US (1) US20140112092A1 (en)
EP (1) EP2714257B2 (en)
CN (1) CN103596668A (en)
DE (2) DE102011102606A1 (en)
WO (1) WO2012163444A1 (en)

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US4491019A (en) 1981-12-24 1985-01-01 Kontron Holding A.G. Detection of dynamic unbalances of centrifuges
GB2122396A (en) 1982-06-11 1984-01-11 Exxon Research Engineering Co Monitoring system, for example for a pump or fluid mixer/agitator
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US20140112092A1 (en) 2014-04-24
WO2012163444A1 (en) 2012-12-06

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