EP3639915B1 - Organe d'agitation multiple - Google Patents

Organe d'agitation multiple Download PDF

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Publication number
EP3639915B1
EP3639915B1 EP18200749.2A EP18200749A EP3639915B1 EP 3639915 B1 EP3639915 B1 EP 3639915B1 EP 18200749 A EP18200749 A EP 18200749A EP 3639915 B1 EP3639915 B1 EP 3639915B1
Authority
EP
European Patent Office
Prior art keywords
stirring
shaft
bodies
agitator
element 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.)
Active
Application number
EP18200749.2A
Other languages
German (de)
English (en)
Other versions
EP3639915A1 (fr
Inventor
Dieter Wassmer
Christoph Kohlbrenner
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.)
Visco Jet Ruehrsysteme GmbH
Original Assignee
Visco Jet Ruehrsysteme GmbH
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 Visco Jet Ruehrsysteme GmbH filed Critical Visco Jet Ruehrsysteme GmbH
Priority to EP18200749.2A priority Critical patent/EP3639915B1/fr
Priority to PL18200749.2T priority patent/PL3639915T3/pl
Priority to DK18200749.2T priority patent/DK3639915T3/da
Priority to HUE18200749A priority patent/HUE059951T2/hu
Priority to ES18200749T priority patent/ES2927666T3/es
Priority to RU2019132610A priority patent/RU2770580C2/ru
Publication of EP3639915A1 publication Critical patent/EP3639915A1/fr
Application granted granted Critical
Publication of EP3639915B1 publication Critical patent/EP3639915B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/07—Stirrers characterised by their mounting on the shaft
    • B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
    • B01F27/0726—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis having stirring elements connected to the stirrer shaft each by a single radial rod, other than open frameworks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/117—Stirrers provided with conical-shaped elements, e.g. funnel-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/19—Stirrers with two or more mixing elements mounted in sequence on the same axis
    • B01F27/191—Stirrers with two or more mixing elements mounted in sequence on the same axis with similar elements

Definitions

  • the invention relates to an agitator for mixing and/or homogenizing flowable media according to the preamble of patent claim 1, and an agitator equipped with this agitator.
  • Agitators are used in a wide variety of applications. Examples of possible areas of application include the production of paints and varnishes or the production of beverages and food.
  • the use of agitators is also regularly required in the manufacture of pharmaceutical products and cosmetics, as is the case in the manufacture of paper and ceramics.
  • Different agitator arrangements are used for mixing and/or homogenizing the respective substances, depending on the respective area of application.
  • barrel and container agitators that are arranged in or on the respective container, or self-supporting tripod agitators are known.
  • Small to large-volume containers for storing or transporting mixtures of substances can also be equipped with an agitator to prevent segregation during storage or transport.
  • the agitator is adjusted to the material to be mixed as well as the shape and size of the respective container.
  • Agitators generally include a shaft that can be driven by an electric motor, by means of which one or more agitating elements connected to the shaft in a rotationally fixed manner are moved on a circular path. Placed in a container with a flowable Medium, the stirring elements are flown around by the medium due to their movement. Depending on the shape of the stirring elements, their arrangement in the container and the speed at which the stirring elements are moved, certain flow conditions occur in the material to be stirred, which cause thorough mixing of the material to be stirred.
  • Agitators are known which are operated at high speeds in order to achieve the desired thorough mixing effect by swirling the material to be agitated. This can lead to air intake and/or foam formation, which, however, are undesirable for certain applications. This is the case, for example, in the manufacture of paints or in the manufacture of ceramics. High speeds, especially in combination with sharp-edged agitators, can also cause shear forces that can damage mixtures of substances that are sensitive to impact and shear. Sensitive mixtures of substances also include certain foods or biochemical products.
  • color mixtures can also exhibit such a sensitivity.
  • the high flow velocities usually associated with the high speeds can also lead to heating of the material to be stirred.
  • an agitator which allows a flowable medium to be completely mixed at a relatively low speed of movement of the agitating elements. It is therefore also suitable for treating sensitive mixtures of substances.
  • the low speed of movement of the stirring elements causes countercurrents to develop in the material being stirred, which promote the mixing effect.
  • the stirring times can even be shortened. Low drive power and short stirring times also lead to a reduction in the required energy consumption.
  • the known agitator comprises a shaft for rotating the agitating elements, which comprise arms running perpendicularly to the longitudinal axis of the shaft, each of which carries an agitating body with a conically running tube section.
  • the cross section of the conical tube section narrows in the opposite direction to the direction of rotation, ie in the direction of flow.
  • the inlet opening for the stirring material flowing through is therefore larger than the outlet opening.
  • the longitudinal axis of the conical tube section is also inclined downwards in the direction of rotation.
  • the concrete design and arrangement of the stirring bodies and their low speed of movement are intended to bring about flow conditions which enable the material to be stirred to be covered over a wide area and thus enable effective and efficient mixing.
  • agitating bodies are designed as tube sections which have four side walls, at least one of which has an arcuate or polygonal course.
  • the arms carrying the agitating bodies are arranged on a common hub which is connected to the shaft for common rotation. This simplifies production and, above all, assembly on the shaft of the agitator.
  • the use of such a hub is not absolutely necessary for the invention. Instead, it is conceivable to arrange the arms on the shaft in a different way.
  • the entirety of the hub (if present), arms and stirring bodies is referred to as a stirring element in the context of this application.
  • the stirring bodies of the stirring element are also referred to as beakers, regardless of their specific shape.
  • a cup within the meaning of the invention is therefore any stirring body through which the material to be mixed flows during operation.
  • the cups are arranged in a common plane perpendicular to the direction of the drive shaft.
  • Another important object of the invention is to provide an agitator and an agitator equipped therewith which can be used effectively at both high and low speeds.
  • the essence of the solution according to the invention consists in the arrangement of the beakers belonging to a stirring element of a stirring stage on different levels normal (perpendicular) to the stirring shaft, which are each at a defined distance from one another in the axial direction.
  • the individual beakers of the agitator are not at the same height, i. H. that the distance between the end of the shaft and the arm (mounting of the cups) is different in each case.
  • the stirring medium usually has a sufficiently small inertia to react to the force exerted by the individual bowls of the stirring element before the next bowl of the stirring element reaches the position of the previous bowl.
  • the speed is increased until the inertia of the medium is sufficiently effective, the effect begins with the previously known agitators that the following cup disturbs the resulting flow.
  • buckets with smaller diameters can be used with the same peripheral speed.
  • the stirring element preferably consists of a hub (or the stirring shaft or a part of the stirring shaft) on which spoke-like rods are attached are attached, which serve as arms to support the cups and in turn connect the individual cups with the shaft or hub.
  • each cup of the stirring element basically has a cone shape, similar to that of DE 39 01 894 known stirring body.
  • the cup has an inlet opening and an outlet opening opposite this for the material to be mixed, the diameter of the inlet opening being larger than that of the outlet opening.
  • impeller bowls be of the same shape and size.
  • the stirring element is preferably made of a metallic material such as steel.
  • the stirring element comprises at least two, more preferably at least three, cups, which are advantageously arranged symmetrically around the hub or stirring shaft.
  • the cups can advantageously be arranged so that their longitudinal axis runs at a non-zero angle to the plane perpendicular to the main axis of the stirring shaft, in which the point of attachment of the corresponding arm to the hub or shaft lies.
  • the cups are therefore arranged inclined or angled with respect to the direction of rotation of the stirring element. The angle does not have to be the same for all beakers of a stirring element.
  • the cups can be movably attached to the arms in such a way that their angular position relative to the agitator shaft can be adjusted.
  • the agitator according to the invention according to claim 1 comprises a drivable agitator shaft and at least one agitator, each agitator at least two stirring bodies (beakers) firmly connected to the shaft via a support arm.
  • the agitator shaft can preferably be driven by an electric motor, so that each agitator body attached to the outside of a support arm can be moved along a circular path concentrically to the longitudinal axis of the shaft.
  • the agitator preferably has at least one agitating element which comprises three agitating bodies arranged in a star shape at the corners of an imaginary isosceles triangle.
  • the support arm preferably has a low overall height in the direction of the longitudinal axis of the shaft, in order to reduce the flow resistance.
  • a hub or sleeve, to which the support arms are attached, is preferably used to attach the agitator elements to the agitator shaft. Provision can be made for the support arms to be connected to the hub by a screw connection or directly to the agitator shaft.
  • the attachment of the stirring elements or the support arms to the stirring shaft can also take place via a plug-in connection, insofar as a non-rotatable connection is ensured at least in the direction of rotation of the shaft.
  • a screw or plug connection for fastening the stirring element to the stirring shaft of the agitator should be detachable in order to enable the stirring element to be replaced. Provision can be made for the cups to be arranged on the support arms in a detachable and thus interchangeable manner. Depending on the type of material to be stirred or the size of the container, the agitator or the agitating elements and/or beakers can then be matched to the respective application with regard to their specific shape, size or number.
  • each beaker is connected to the stirrer shaft by means of a folding and/or swiveling support arm.
  • the support arms are then pivoted into an orientation parallel to the longitudinal axis of the shaft, and the stirring elements are brought together in the process. In this way, the unloading of the Agitator can be reduced, so that the insertion of the stirring elements is also possible through small openings.
  • the agitators can be reset automatically by the action of the centrifugal forces when the agitator is started up.
  • restoring mechanisms can be provided, for example springs, which—possibly with support—cause the restoring of the stirring elements.
  • the design of a stirring element described above or a stirring mechanism equipped with such stirring elements make it possible to save energy and time when mixing and/or homogenizing a flowable medium and thus allow a particularly efficient stirring process to be carried out.
  • differently designed agitators, agitators or agitator arrangements can be kept in stock and replaced if necessary, so that the right agitator can be provided for every area of application.
  • the specific design and arrangement of the stirring elements which are tailored to the material to be stirred and the container, also counteracts the formation of dead zones, since the material to be stirred is completely covered and thoroughly mixed.
  • each cup 2 is fastened to the support arm 3 by means of a welded connection, but can instead be made, for example, by means of a detachable connection, such as a screw connection, or by means of a swivel joint.
  • the stirring bodies or beakers 2 are conical hollow bodies with an inlet opening 5 and an outlet opening 6 of smaller diameter for a medium flowing through. All cups 2 of the stirring element 1 are of the same shape and size in the exemplary embodiment, but could be different.
  • the inlet opening 5 is in the intended direction of rotation of the stirring element 1 during operation on the front side of the cup, and the outlet opening is correspondingly on its rear side.
  • the beakers 2 are arranged on different planes which are normal (perpendicular) to the agitator shaft and which are each at a defined distance from one another in the axial direction. With regard to the longitudinal extent of the stirring shaft, the individual cups 2 of the stirring element 1 are therefore not at the same height, i. H. that the distance between the end of the shaft and the support arm 3 (mounting of the buckets) is different for all buckets 2.
  • the beakers 2 are arranged in such a way that their longitudinal axis runs at an angle other than zero to the plane perpendicular to the main axis of the agitator shaft, in which the attachment point of the corresponding support arm 3 on the hub 4 lies.
  • the cups 2 are therefore arranged inclined or angled with respect to the direction of rotation of the stirring element 1 .
  • the angle does not have to be the same for all beakers 2 of a stirring element 1 .
  • the beakers can be movably attached to the support arms 3 in such a way that their angular position relative to the agitator shaft can be adjusted.
  • a (preferably electric motor) drivable agitator shaft which is concentrically connected to the agitator for common rotation.
  • the shaft can, for example, be part of a tripod agitator or another agitator that can be inserted into a container containing a flowable medium.
  • connection of the stirring element to the stirring shaft is expediently detachable, so that the stirring element can be exchanged and adapted to the respective application.
  • An agitator optimized in this way enables the material to be agitated to be thoroughly mixed in the shortest possible time and with reduced drive power, so that the process can be described as particularly efficient.
  • Fig. 2 shows the power consumption of an agitator that is provided with the agitator element described above (lower curve), compared to the power consumption of an otherwise identical agitator in which, according to the prior art mentioned at the outset, all the buckets are arranged in the same plane (upper Curve).
  • the mix is always the same in terms of type and quantity. The difference is therefore only in the arrangement of the cups, in three different planes in the invention but in the same plane in the prior art.
  • the power consumption in the agitator according to the invention is significantly lower at speeds above 500 rpm than in the conventional agitator.
  • the agitator according to the invention can also be operated at higher speeds than the conventional agitator without the stirring effect suffering.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Claims (6)

  1. Agitateur pour mélanger et/ou homogénéiser des milieux aptes à l'écoulement avec un arbre d'agitation pouvant être entraîné et avec au moins un organe agitateur (1), sachant que chaque organe agitateur (1) est relié fixement à l'arbre d'agitation dans le sens de la rotation, sachant que l'organe agitateur (1) est doté au moins deux corps d'agitation (2) comportant une ouverture d'entrée et une ouverture de sortie pour le milieu apte à l'écoulement, sachant qu'au moins les deux corps d'agitation sont reliés fermement chacun par un bras de support (3) à l'arbre, sachant que l'ouverture d'entrée (5) est plus grande que l'ouverture de sortie (6),
    sachant que les corps d'agitation (2) correspondant à l'organe agitateur (1) sont disposés sur des plans différents, se trouvant normalement, perpendiculairement à l'arbre d'agitation, qui comportent respectivement dans la direction axiale une distance définie les uns par rapport aux autres,
    sachant que les corps d'agitation sont des corps creux coniques,
    caractérisé en ce qu'
    en fonctionnement, l'axe longitudinal des bras de support (3) est orienté pour l'essentiel perpendiculairement à l'axe longitudinal de l'arbre d'agitation.
  2. Agitateur selon la revendication 1, caractérisé en ce qu'au moins deux, de façon plus préférée, au moins trois corps d'agitation (2) sont disposés au moyen de bras de support (3) symétriquement autour d'un moyeu (4) sur l'arbre d'agitation ou autour de l'arbre d'agitation.
  3. Agitateur selon l'une quelconque des revendications précédentes, caractérisé en ce que les axes longitudinaux des corps d'agitation (2) passent sous un angle différent de zéro par rapport au plan perpendiculairement à l'axe principal de l'arbre d'agitation dans lequel se situe le point de fixation du bras de support correspondant (3) sur le moyeu ou l'arbre.
  4. Agitateur selon l'une quelconque des revendications précédentes, caractérisé en ce que les corps d'agitation (2) sont fixés mobiles sur les bras de support (3) de manière que leur position angulaire peut être réglée par rapport à l'arbre d'agitation.
  5. Agitateur selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins un corps d'agitation, de préférence chaque corps d'agitation (2) est relié par un bras de support (3) rabattable et/ou pivotable au moyeu (4) de l'arbre d'agitation.
  6. Agitateur selon la revendication 1, caractérisé en ce que les corps d'agitation (2) sont disposés en fonctionnement de façon symétrique en rotation et à la même distance les uns des autres.
EP18200749.2A 2018-10-16 2018-10-16 Organe d'agitation multiple Active EP3639915B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP18200749.2A EP3639915B1 (fr) 2018-10-16 2018-10-16 Organe d'agitation multiple
PL18200749.2T PL3639915T3 (pl) 2018-10-16 2018-10-16 Wielopłaszczyznowy element mieszający
DK18200749.2T DK3639915T3 (da) 2018-10-16 2018-10-16 Flertrinsomrøringselement
HUE18200749A HUE059951T2 (hu) 2018-10-16 2018-10-16 Többsíkú keverõmû
ES18200749T ES2927666T3 (es) 2018-10-16 2018-10-16 Elemento agitador multinivel
RU2019132610A RU2770580C2 (ru) 2018-10-16 2019-10-15 Многоступенчатый месильный орган

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18200749.2A EP3639915B1 (fr) 2018-10-16 2018-10-16 Organe d'agitation multiple

Publications (2)

Publication Number Publication Date
EP3639915A1 EP3639915A1 (fr) 2020-04-22
EP3639915B1 true EP3639915B1 (fr) 2022-07-20

Family

ID=63878423

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18200749.2A Active EP3639915B1 (fr) 2018-10-16 2018-10-16 Organe d'agitation multiple

Country Status (6)

Country Link
EP (1) EP3639915B1 (fr)
DK (1) DK3639915T3 (fr)
ES (1) ES2927666T3 (fr)
HU (1) HUE059951T2 (fr)
PL (1) PL3639915T3 (fr)
RU (1) RU2770580C2 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH333494A (fr) * 1957-01-22 1958-10-31 Plenty & Son Limited Dispositif mélangeur rotatif
CH675215A5 (fr) 1988-02-08 1990-09-14 Kurt Walter Wyss
DE4129594C2 (de) * 1991-09-06 1994-06-23 Marquardt Juergen Vorrichtung zum Behandeln einer Flüssigkeit
RU2277964C2 (ru) * 2004-08-12 2006-06-20 Общество с ограниченной ответственностью "НПО Янтарь" Мешалка
DE202005008676U1 (de) * 2005-01-25 2005-10-06 Wp-Aro Gmbh Rührvorrichtung
DE102008005018B3 (de) 2008-01-17 2009-03-12 INOTEC GmbH Transport- und Fördersysteme Rührorgan und Rührwerk zum Mischen und/oder Homogenisieren strömungsfähiger Medien
RU2396108C1 (ru) * 2009-04-13 2010-08-10 Государственное образовательное учреждение высшего профессионального образования "Ивановский государственный архитектурно-строительный университет" (ГОУ ВПО ИГАСУ) Мешалка
RU2578156C1 (ru) * 2014-10-09 2016-03-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Ярославский государственный технический университет" (ФГБОУВПО "ЯГТУ") Мешалка
DE102016114735A1 (de) * 2016-08-09 2018-02-15 Mut Tschamber Misch- Und Trenntechnik Gmbh Rührwerkzeug

Also Published As

Publication number Publication date
ES2927666T3 (es) 2022-11-10
PL3639915T3 (pl) 2023-01-09
RU2770580C2 (ru) 2022-04-18
RU2019132610A3 (fr) 2021-10-14
EP3639915A1 (fr) 2020-04-22
DK3639915T3 (da) 2022-10-17
HUE059951T2 (hu) 2023-01-28
RU2019132610A (ru) 2021-04-15

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