EP2119496A1 - Outil de mélange et dispositif de mélange - Google Patents

Outil de mélange et dispositif de mélange Download PDF

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Publication number
EP2119496A1
EP2119496A1 EP08009066A EP08009066A EP2119496A1 EP 2119496 A1 EP2119496 A1 EP 2119496A1 EP 08009066 A EP08009066 A EP 08009066A EP 08009066 A EP08009066 A EP 08009066A EP 2119496 A1 EP2119496 A1 EP 2119496A1
Authority
EP
European Patent Office
Prior art keywords
mixing
tool
drive
mixing tool
rotation
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
EP08009066A
Other languages
German (de)
English (en)
Other versions
EP2119496B1 (fr
Inventor
Jens Biehl
Jörg-Henry Dr. Schwabe
Werner Müller
Martin Wieland
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.)
WIGGERT and Co GmbH
Institut fuer Fertigteiltechnik und Fertigbau Weimar eV
Original Assignee
WIGGERT and Co GmbH
Institut fuer Fertigteiltechnik und Fertigbau Weimar eV
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 WIGGERT and Co GmbH, Institut fuer Fertigteiltechnik und Fertigbau Weimar eV filed Critical WIGGERT and Co GmbH
Priority to DK08009066.5T priority Critical patent/DK2119496T3/da
Priority to AT08009066T priority patent/ATE493198T1/de
Priority to DE502008002141T priority patent/DE502008002141D1/de
Priority to EP08009066A priority patent/EP2119496B1/fr
Publication of EP2119496A1 publication Critical patent/EP2119496A1/fr
Application granted granted Critical
Publication of EP2119496B1 publication Critical patent/EP2119496B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/10—Mixing in containers not actuated to effect the mixing
    • B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
    • B28C5/16—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a vertical or steeply inclined axis
    • B28C5/166—Pan-type mixers
    • 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
    • B01F27/114—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections
    • 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
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/82—Pan-type mixers, i.e. mixers in which the stirring elements move along the bottom of a pan-shaped receptacle
    • 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
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/95—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with stirrers having planetary motion, i.e. rotating about their own axis and about a sun axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/28—Mixing cement, mortar, clay, plaster or concrete ingredients

Definitions

  • the invention relates to a mixing tool for installation in a mixing device for mixing concrete quantities or other mixtures of several components.
  • the invention also relates to a mixing device for mixing a batch of several components with such a mixing tool.
  • the process chain of the processing of cementitious mixtures for the production of concrete products ranges from the preparation and metering of raw materials through the mixing process, transport and shaping to compaction.
  • the mixing process is of particular importance.
  • Mixing is one of the basic operations of process engineering. This is understood to mean the material combination of different starting materials. Before the mixing process, the starting materials are separated and often present in different states of aggregation, and the composition also varies as a rule. In the mixing process, these starting materials are mixed, combined, homogenized or homogenized.
  • the aim of each mixing process consists in a uniform distribution of all components of the starting materials in the total mixture, the so-called population. Each sample should therefore have the same composition as the population after mixing.
  • the degree of homogenization is called mixed quality.
  • the prerequisite for achieving a high product quality with high efficiency is therefore the creation of an evenly distributed mixing quality in the population within the shortest possible time.
  • the assessment of the mixing quality is regulated in DIN 459-2 (11/1995).
  • mixer types can be made by the type of movement of the mix, such as in an article of P. Nolt and R. Loewe in the journal BWI - Concrete Plant International, No. 3, June 2004, pages 54-77 described.
  • compulsory mixers which forcibly move the mix by rotating mixing tools and thereby mix thoroughly and with high mixing quality.
  • free-fall mixers on the other side have a rotating drum vessel with internal blading. By turning the drum, the mix is lifted and mixed in free fall.
  • free-fall mixers have a long mixing time and lower mixing quality.
  • a type of compulsory mixer often encountered in concrete works is the so-called plate mixer.
  • This consists of a stationary in operation or rotating mixing container with vertical or inclined symmetry or rotation axis.
  • the plate mixer has fixed or rotating mixing tools, which are arranged centrally or eccentrically with respect to the axis of symmetry. Due to the rotational movements of the movable components, a homogenization of the mixed material is achieved, wherein the main direction of movement of the batch components runs parallel to the mixer bottom.
  • mixing tools are usually mixing blades, which are arranged obliquely, so that an additional vertical movement of the mixed material takes place, in order to achieve in this way over the entire volume uniformly high mixing quality.
  • these blades are arranged, for example, in a ring trough mixer or planetary mixer with drum-shaped mixing container on the bottom of the mixing container or at a fixed height, the mixing in the vertical direction is often not sufficient, the batch flows do not go through the entire batch height. On the contrary, areas occur in which the mixing is poor. In particular, when mixing water, this can lead to consistency variations within a batch of the mixture, so that ultimately quality losses are to be expected.
  • a cone mixer which also has several mixing tools. These are on the one hand mixing arms with mixing paddles which coat the mixing container surface touched by the mixture, and on the other hand a stirrer, which comprises a vertically arranged screw whose axis of rotation is arranged centrally with respect to the cross-sectional area of the mixing container.
  • the axis of rotation of the agitator and that of the mixing arms are coaxial.
  • the object of the invention is therefore to develop a mixing tool with which an improved compared to the prior art, more efficient mixing of mixture of a plurality of components, in particular concrete amount is achieved.
  • the mixing tool should be designed so that it can be used in a variety of existing planetary mixing devices.
  • This object is achieved for a mixing tool of the type described in the introduction by having at least one arm with two ends, at one end of the at least one arm a rotating mixing helix, a mixing tool drive which drives the mixing helix and a connecting piece for connecting the mixing tool to a mixing device includes.
  • the mixing spiral - also referred to as a screw - promotes mixing against gravity during rotation.
  • the position of the mixing helix i. the position of the mixing helix rotational axis with respect to a central axis of rotation or symmetry of the mixing device-for example a plate mixing device-is adjustable in a preferred embodiment with respect to the distance to this central axis of rotation.
  • the mixing tool has two arms, the arms preferably include an angle of 180 degrees. At the outside, each other opposite ends of the two arms, that is, the ends located farther away from each other, the mixing helices are arranged. In this way, the mixing can be improved without driving the design effort too much in the air.
  • the two arms can also be combined and manufactured as a structural unit, which increases the stability.
  • the mixing tool drive which can be arranged, for example, in the interior of the arms designed as a unit, then drives both mixing spirals.
  • the use of several arms is possible. For example, three arms may be arranged in a star shape around the connector at an angle of 60 degrees, or four and more arms. Also asymmetric arrangements with respect to the angle and the length of the arms are feasible variants, the latter in particular to reach as far as possible areas of the batch. Also in the middle, below the connector, an additional mixing coil can be arranged.
  • the central axis of rotation and the mixing helix rotational axes are generally parallel, ie the rotating mixing helixes convey in a direction corresponding to the screw guide set direction of rotation counter to the force of gravity in a vertical upward direction.
  • the rotational relative movement between mixing tools and mixing container may mean, on the one hand, that the mixing container rotates about fixed mixing tools, but on the other hand, that the mixing container is fixed and rotate the mixing tools in this around the central axis of rotation. Both devices are equivalent in their effect.
  • the mixing tools themselves can also be designed so that they rotate about a common axis.
  • the mixing tool according to the invention can be designed such that the mixing spirals rotate about a common axis of rotation in the middle of the arm. If the mixing tool mounted in a planetary mixer, so this additional rotation can be, for example, by an additional planetary gear realize, which is itself driven by the planetary gear of the mixer.
  • the connector is designed as a flange - with holes mounted on the circumference - whose dimensions are chosen so that a connection to the arms of conventional plate mixing devices, in particular planetary mixers or planetary countercurrent mixers, can be readily produced.
  • a connection to the arms of conventional plate mixing devices in particular planetary mixers or planetary countercurrent mixers, can be readily produced.
  • An exchange with attached to these arms mixing tools in commercial mixers is readily possible in this way.
  • a corresponding Anflansch published must be attached as an adapter to the mixing device, if it is not there.
  • the position of the mixing helix (s) in the mixing device can be easily changed and set as variable:
  • the position of the arm can be easily and mechanically robustly changed by means of the flange, since the holes usually present on a flange insertion into different positions with subsequent screwing with a corresponding Anflansch published on a boom of the mixing device allow.
  • the position of the arm between radial and tangential with respect to the symmetry axis of the Mischvorrichung can also be motorized, this can be provided an internal or external control device. This allows adjustment during operation.
  • the mixing tool in this case has a mixing tool drive, which is preferably designed as a toothed belt drive or gear drive and drives both mixing spirals.
  • the mixing tool may be provided with its own motor, but preferably it has a coupling through which the mixing tool drive is coupled to the drive of a mixing device.
  • the clutch expediently comprises a drive pinion, which is set in rotation by the drive of the mixing device and transmits this to the drive. Other, common types of coupling are usable.
  • the rotational speed of the mixing spirals can also be adjusted by means of a corresponding control device.
  • the mixing tool on can be variably adjusted. This allows adaptation to different batch types. Since the drive of the mixing device usually only generates rotations with low rotational frequencies, preferably a translation into faster rotations takes place.
  • the mixing container rotates with fixed - but rotating - mixing tools the symmetry axis of the mixing container, or the mixing tools in the container.
  • An opposite rotation of container and tools is possible.
  • the mixing device usually has a planetary gear, wherein the sun gear rotates about the central axis of rotation, thereby driving the mixing tools and possibly rotated.
  • About the coupling of the mixing tool drive is coupled via the planetary gear with the drive of the mixing device.
  • the drive then drives the mixing tools via the planetary gear, so that they rotate about the axis of symmetry. In this way can be dispensed with a separate motor in the first mixing tool, the drive of the mixing tool drive via the planetary gear of the mixing device.
  • the ratio between the planetary gear and the toothed belt drive is variably adjustable, for example, the clutch may have integrated tasksseinstellstoff.
  • a second mixing tool for example, a slider or a mixing blade in question, or even a pair of such blades, which can also rotate about a common, eccentric second axis of rotation.
  • a third mixing tool can be designed as a scraper. The use of further, known in the art mixing tools is also possible.
  • a mixing device for mixing a mixture of several components is shown.
  • the mixing device is based on the principle of a plate mixer and comprises a drum-shaped mixing container 1 with a circular cross-sectional area.
  • the mixing device also comprises a first mixing tool 2, which in turn comprises two rotating mixing helices 4 with mixing helix axes of rotation attached to two arms 3.
  • the arms 3 are here arranged at an angle of 180 degrees to each other and configured as a unit of two individual arms, but it can also be two single arms that do not form a unit used.
  • a second mixing tool is designed as a conventional mixing star 5 with mixing blades 6.
  • Fig.1 is the second mixing tool, the mixing star 5 arranged behind the first mixing tool 2.
  • the mixing blades 6 are here shown slightly above the bottom of the mixing container 1, but they can also be mounted in the vertical direction still higher or at different heights.
  • the mixing device also has one or more scrapers 7a, 7b, with scraper 7a mixture is scraped off the ground, with scraper 7b batch of the wall of the mixing container 1.
  • mixing stars 5 and scrapers 7a, 7b belong to the standard equipment one mixing device.
  • Above the mixing container 1 is a drive 8, by means of which a planetary gear 9, the mixing tools are driven, so that they rotate about a central axis of rotation R.
  • the planetary gear 9 also the mixing star can be set directly in rotation, including a further planetary gear can be provided.
  • the first mixing tool 2 In order to set the mixing spirals 4 in rotation, the first mixing tool 2 has a corresponding coupling and its own drive. About a Anflansch published 10, the first mixing tool 2 can be connected to the planetary gear 9 of the mixing device, the orientation of the combined to form a unit two individual arms 3 with respect to the central axis of rotation R can be done arbitrarily between radial and tangential position.
  • Fig.2 are the mixing tools off Fig.1 without the mixing device shown in detail in perspective view.
  • Anflansch consortium 10 for the first mixing tool 2 is used at this a flange 11.
  • a drive pinion 12 which is basically assigned to the planetary gear 9 in the mixing device.
  • the drive pinion 12 is assigned to the first mixing tool 2, since a coupling, not shown, is connected to the drive pinion 12, which makes it possible to realize different gear ratios from the planetary gear 9 to the mixing tool drive.
  • a gear ratio to the faster, for example between 1: 2 and 1: 4.
  • the mixing helices 4 may for example have a diameter between 300 mm and 1000 mm and an increase between 300 mm and 800 mm. However, these details are only to be understood as examples and relate to typical mixer sizes. Depending on the dimensions of the mixing container 1, deviating dimensions of the mixing coils 4 are also possible.
  • the mixing helices 4 are also provided at their lower end with sliders 13. These allow an additional improvement of the horizontal and vertical mixing of the batch.
  • the first mixing tool 2 is in the FIGS. 3 and 4 shown in more detail.
  • the assembly of two individual arms 3 is shown open to more clearly show the mixing tool drive therein, a toothed belt drive.
  • a toothed belt drive When the housing wall of the unit is still an upper housing part 14 and a lower housing part 15 can be seen, between which the toothed belt drive is located, which is shown here only schematically by a rotating toothed belt 16 which is guided over guide rollers 17.
  • the pulleys 17 serve as tension rollers at the same time.
  • Inside the arm housing is behind the timing belt 16 - not shown - the clutch.
  • the translation is usually fixed, but the device may be designed to allow for the variable adjustment of translations - controlled manually or externally.
  • the first mixing tool 2 can be used on the Anflansch Swiss 10 of a mixing device, in this way, the first mixing tool 2 for an easily replaceable and universally usable in different mixing devices, if they have corresponding Anflansch publishede 10. You may also be able to use adapters to deliver a connection. Another type of connection is possible, which allows a motorized and controlled adjustment of the positions of the mixing helix rotational axes E relative to the central symmetry or rotation axis R.
  • the first mixing tool 2 which can be used universally, in particular also in planetary mixers and planetary countercurrent mixers, it is possible to generate vertical material flows against gravity in the mixture to be mixed, so that the mixture is mixed more efficiently.
  • the transport of the mixture in the vertical direction takes place with the aid of the mixing helices 4.
  • the mixing is intensified compared to the usual plate mixers by the additional vertical direction of movement, resulting in an overall shorter mixing time for the same or better mixing quality.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • General Preparation And Processing Of Foods (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Food-Manufacturing Devices (AREA)
EP08009066A 2008-05-16 2008-05-16 Outil de mélange et dispositif de mélange Not-in-force EP2119496B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DK08009066.5T DK2119496T3 (da) 2008-05-16 2008-05-16 Blandingsværktøj og blandingsindretning
AT08009066T ATE493198T1 (de) 2008-05-16 2008-05-16 Mischwerkzeug und mischvorrichtung
DE502008002141T DE502008002141D1 (de) 2008-05-16 2008-05-16 Mischwerkzeug und Mischvorrichtung
EP08009066A EP2119496B1 (fr) 2008-05-16 2008-05-16 Outil de mélange et dispositif de mélange

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08009066A EP2119496B1 (fr) 2008-05-16 2008-05-16 Outil de mélange et dispositif de mélange

Publications (2)

Publication Number Publication Date
EP2119496A1 true EP2119496A1 (fr) 2009-11-18
EP2119496B1 EP2119496B1 (fr) 2010-12-29

Family

ID=39790206

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08009066A Not-in-force EP2119496B1 (fr) 2008-05-16 2008-05-16 Outil de mélange et dispositif de mélange

Country Status (4)

Country Link
EP (1) EP2119496B1 (fr)
AT (1) ATE493198T1 (fr)
DE (1) DE502008002141D1 (fr)
DK (1) DK2119496T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114030086A (zh) * 2021-11-18 2022-02-11 怀化远大建筑工业有限公司 一种混凝土预制件生产加工用混凝土搅拌装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012210558B4 (de) 2012-06-22 2017-05-24 Ernst-Abbe-Fachhochschule Jena Planetenmischwerkzeug

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE878174C (de) * 1944-10-18 1953-06-01 Ernst Brueckner Mischmaschine
US4034967A (en) * 1975-08-27 1977-07-12 Gustairs John A Mixer
DE3114477C1 (de) 1981-04-10 1982-11-04 Walter Stahl Ringtrogzwangsmischer
EP0096136A1 (fr) * 1982-06-04 1983-12-21 COUVROT LAINE & Cie Société Anonyme Malaxeur à cuve fixe
DE29722838U1 (de) * 1997-12-24 1998-02-12 Liebherr-Mischtechnik Gmbh, 88427 Bad Schussenried Ringtrogzwangsmischer
DE19806140A1 (de) 1998-02-14 1999-08-19 Wollenick Wirbler für Mischer
DE19950743A1 (de) 1999-10-21 2001-04-26 Harald Kniele KKM-Mischer
DE10137489A1 (de) * 2001-07-31 2003-02-13 Martin Theodor Melchior Mischvorrichtung zum Mischen von pulverförmigen Stoffen mit Wasser

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE878174C (de) * 1944-10-18 1953-06-01 Ernst Brueckner Mischmaschine
US4034967A (en) * 1975-08-27 1977-07-12 Gustairs John A Mixer
DE3114477C1 (de) 1981-04-10 1982-11-04 Walter Stahl Ringtrogzwangsmischer
EP0096136A1 (fr) * 1982-06-04 1983-12-21 COUVROT LAINE & Cie Société Anonyme Malaxeur à cuve fixe
DE29722838U1 (de) * 1997-12-24 1998-02-12 Liebherr-Mischtechnik Gmbh, 88427 Bad Schussenried Ringtrogzwangsmischer
DE19806140A1 (de) 1998-02-14 1999-08-19 Wollenick Wirbler für Mischer
DE19950743A1 (de) 1999-10-21 2001-04-26 Harald Kniele KKM-Mischer
DE10137489A1 (de) * 2001-07-31 2003-02-13 Martin Theodor Melchior Mischvorrichtung zum Mischen von pulverförmigen Stoffen mit Wasser

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
VON P. NOLT; R. LOEWE, DER ZEITSCHRIFT BWI - BETONWERK INTERNATIONAL, June 2004 (2004-06-01), pages 54 - 77

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114030086A (zh) * 2021-11-18 2022-02-11 怀化远大建筑工业有限公司 一种混凝土预制件生产加工用混凝土搅拌装置

Also Published As

Publication number Publication date
DE502008002141D1 (de) 2011-02-10
DK2119496T3 (da) 2011-04-18
ATE493198T1 (de) 2011-01-15
EP2119496B1 (fr) 2010-12-29

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