EP3552788B1 - Mischgerät für feuchte oder trockene materialien, insbesondere komponenten für die betonherstellung - Google Patents

Mischgerät für feuchte oder trockene materialien, insbesondere komponenten für die betonherstellung Download PDF

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Publication number
EP3552788B1
EP3552788B1 EP19165308.8A EP19165308A EP3552788B1 EP 3552788 B1 EP3552788 B1 EP 3552788B1 EP 19165308 A EP19165308 A EP 19165308A EP 3552788 B1 EP3552788 B1 EP 3552788B1
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European Patent Office
Prior art keywords
mixing
train
diameter
tank
drive shaft
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Active
Application number
EP19165308.8A
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English (en)
French (fr)
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EP3552788A1 (de
Inventor
Jens AALBORG NIELSEN
Eric Brunquet
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Skako Concrete AS
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Skako Concrete AS
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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
    • B28C5/168—Pan-type mixers with stirrers having planetary motion
    • 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
    • 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
    • B28C5/0806—Details; Accessories
    • B28C5/0818—Charging or discharging gates or chutes; Sealing means

Definitions

  • the present invention relates to an apparatus for mixing wet or dry materials, in particular components for the manufacture of concrete.
  • the field of the invention is that of devices for mixing wet or dry materials, and in particular of the various components used during the manufacture of concrete, and more particularly on concrete production sites, known under the name of concrete factories. concrete.
  • such an apparatus generally comprises a tank, the size of which may be up to several m 3 .
  • Said tank receives the various materials to be mixed, such as for example the various components of concrete, such as cement, water, sand, aggregates and various additives, which are mixed and mixed so as to form a homogeneous pasty mixture which can then be used on any type of site.
  • Mixing blades driven in rotation with respect to the tank are used in order to achieve the mixing and mixing of the raw concrete materials.
  • the invention relates more particularly to the field of mixers with a fixed tank and an epicyclic train for which the mixing blades are driven along epicyclic paths.
  • a fixed-tank mixing apparatus comprising a fixed tank into which the various components to be mixed are introduced, a mixing train comprising blades driven in an epicyclic movement by a motor member.
  • the mixing train drive device comprises a motor member, fixed, driving a rotary plate via a ring integral with the outer diameter of the plate.
  • the rotating plate serves as a support for the mixing train, said mixing train being articulated in rotation on the plate.
  • the mixing train has, on its drive shaft, a receiving pinion which meshes around a fixed ring gear so as to be rotated relative to the rotary plate.
  • the rotary plate and the fixed crown are coaxial and leave a large central clearance in their center.
  • a central, fixed supply duct crosses this central clearance and allows wide access to the center of the tank, in particular allowing the loading of materials.
  • a mixing train generally comprises at least one arm, at each end of which is fixed a blade, said arm extending perpendicular to the drive shaft of the mixing train, and conventionally centered on said shaft. training.
  • the drive shafts of the various mixing trains are designed to be rotated by a single drive ring gear, and conventionally by means of identical pinions.
  • these different drive shafts will have angular drive speeds relative to the same tank, the angular speed of rotation of each mixing train relative to its drive shaft depending on the ratio between the number of teeth. of its receiving pinion and that of the fixed wheel.
  • the mixing blades fixed to the two ends of the arm of each mixing train, will have a linear speed, which will vary continuously, which allows the mixing by differential stretching of the mixture of the different materials.
  • the mixing trains are driven in rotation about their axis, in the same direction of rotation as the turntable, which makes it possible to maximize the maximum linear speed of said blade.
  • the linear speed of each blade must be such that it does not exceed a certain value, so as not to cause a degradation of the efficiency of the mixture, by segregation and projection, as well as accelerated wear, and that it is not less than a certain value, which would also affect its effectiveness.
  • the dimension of the arms supporting the mixing blades must be such that at least the blades of a mixing train pass through the center of the tank and through the peripheral zone of the tank, which receives the majority of the mixture, without the blades of the various mixing trains coming into collision, during the operation of said mixing apparatus. For this purpose, mixing trains with arms of different lengths can be provided.
  • Such a mixer 1 ' is shown schematically in the figure 1 of the present application.
  • a single mixing train 3 ' has its blades 34'. passing through the center A 'of the tank 2' and that the other mixing trains 4 'have their blades 44' passing at the level of the periphery 21 'of the tank 2'.
  • two pinions 45 ', 46' are interposed between said circular crown 6 'and said drive pinion 42' of the offset mixing trains 4 ', not passing through the center A' of the tank 2 '.
  • the blades 44 of the offset mixing trains 4 ' travel a circular path T4' of diameter D4 ', less than the diameter D3' of the circular path T3 'traveled by the blades 34 of the first mixing train 3.
  • the angular drive speeds of the different mixing trains 3 ', 4' remain identical if their drive pinions 32 ', 42' are, which is the case in the device described in the document WO 9 511 120 A .
  • the maximum linear speed of the blades 34 of the first mixing train 3 is 3.71 m / s
  • the maximum linear speed of the blades 44 of each of the second mixing trains 4 is 3.59 m / s.
  • the average maximum linear speed of the blades is also 3.63 m / s.
  • said ring being intended to be optionally disposed around a supply duct of the tank, provision will have to be made to also reduce the diameter of said duct, which can prove to be problematic for ensuring the supply of the tank. optimally.
  • the maximum linear speed of the blades of the mixing trains in the offset position is limited by this design. Such a limitation affects the general mixing performance, in particular when there are a number of mixing trains in the offset position (ie two, three) and their mixing action thus becomes predominant.
  • the document DE 10 2014 008 067 A1 discloses an apparatus for mixing wet and dry materials according to the preamble of claim 1.
  • the invention proposes to overcome these drawbacks by providing an apparatus for mixing wet or dry materials, in particular components for the manufacture of concrete making it possible to ensure a homogeneous mixture of materials, of simple design and of reduced production cost, and in particular in the case where said mixing apparatus is provided for mixing a large quantity of materials.
  • the invention also makes it possible to use a feed duct centered on the axis of the fixed tank, of dimensions such as to allow optimum feeding of said tank.
  • the pinion fixed on the drive shaft of the first mixing train engages with the first circular ring gear
  • the pinion fixed on the drive shaft of at least one second mixing train engages with the second circular crown
  • the mixing apparatus 1 will be considered in the normal operating position, that is to say placed on the ground. Spatial references, such as “above”, “below”, are considered in such a position, unless specified.
  • the at least one second mixing train 4 can be located in a position offset from the first mixing train 3, without using intermediate gears, which simplifies the design of said device. mixing 1 and reduces its cost price.
  • the angular drive speed of the drive shaft 41 of the at least one second mixing train 4 will be greater than the angular speed of drive of the drive shaft 31 of the first mixing train 3, while their respective pinions 32, 42 may remain identical.
  • the linear speeds at each of the at least one blade 34, 44 of each of the mixing trains 3, 4 are such that the mixing of the materials is optimal so as to obtain a homogeneous concrete.
  • the maximum linear speeds of the blades 34, 44 can be substantially identical, or similar, which allows optimal mixing of the materials in the tank 2.
  • the maximum linear speed of the at least one blade 44 of each second mixing train 4 may be greater than the maximum linear speed of the at least one blade of the first mixing train 3, which is particularly advantageous, in that the mixing action of said second mixing trains is preponderant.
  • the maximum linear speed of each of the blades 44 of the second mixing trains is around 3.8 m / s while the maximum linear speed of the blades 34 of the first mixing train 3 is around 3.5 m / s. .
  • the average maximum linear speed is then 3.72 m / s.
  • the rotary plate 5 is driven in rotation by means of a plurality of geared motors 51, distributed evenly around the rotary plate, each comprising for example a pinion 52 mounted on their drive shaft, said pinion 52 coming into mesh with a circular toothed ring 53 fixed to the turntable 5.
  • geared motors 51 distributed evenly around the rotary plate, each comprising for example a pinion 52 mounted on their drive shaft, said pinion 52 coming into mesh with a circular toothed ring 53 fixed to the turntable 5.
  • all or part of the blades 34, 44 of the mixing trains 3, 4 can be replaced by other rotating elements involved in the mixing of the concrete, such as for example a concrete propeller or also a rapid dispersive effect tool 48, also known under the name of Wirbler in English or Wirbel in German.
  • such a rapid tool with a dispersive effect 48 can advantageously be positioned at the level of a second mixing train 4, sized so as to be propelled at a linear speed of between 5 and 10 m / s, depending on the size of the particles present in tank 2 and the viscosity of the materials.
  • a dispersive effect tool 48 has a crushing effect by impact on the materials present in the tank 2, which combined with the differential stretching effected by the blades 34, 44 of the mixing trains 3, 4, makes it possible to optimize the mixing of materials in the tank 2.
  • this rapid dispersive effect tool 48 at the level of a second mixing train 4, the pinion 42 of which engages with the second circular ring 7 advantageously makes it possible to act on the particles of the materials in the tank 2 near the periphery 22 of said tank 2, which will end up wedged against the periphery 22 of the tank 2 by such a rapid tool with a dispersive effect 48, which can thus break the nodules of fine particles of materials.
  • the mixing apparatus 1 comprises a supply duct 21 arranged above the tank 2, centered on the axis A of the tank 2.
  • the first ring 6 and the second ring 7 are positioned around the supply duct 21 and their respective diameter D6, D7 is strictly greater than the diameter D21 of said supply duct 21, so as not to obstruct the passage through through the supply duct 21, which can thus retain a dimension such as to allow optimum supply of said fixed tank 2.
  • the rotary plate 5 may have a central bore 51, of diameter strictly greater than the diameter D21 of the supply duct.
  • the first mixing train 3 comprises an arm 33 of length L33, arranged perpendicular to the drive shaft 32, centered on said drive shaft 32, two blades 34 being fixed at each end.
  • the second mixing train 4 comprises an arm 43 of length L43, arranged perpendicular to the drive shaft 42, centered on said drive shaft 42, two blades 44 being fixed at each end of the arm 43.
  • the blades 34, 44 are connected to the arms 33, 43 of the mixing trains 3, 4 by means of connecting rods 37, 47.
  • the length L33 of the arm 33 of the first mixing train 3 is strictly greater than the length L43 of the arm 43 of at least one second mixing train 4.
  • the at least one second mixing train 4 meshing with the second ring 7 of larger diameter will be located closer to the periphery 22 of the fixed tank 2.
  • the length of its arm 43 must be reduced compared to that of the arm 33 of the first mixing train 3, so that its blades 34 do not collide with the periphery 22 of said tank 2.
  • the diameter D3 of the path T3 traversed by the at least one blade 34 of the first mixing train 3 is such that said at least one blade 34 passes through the axis A of the tank 2.
  • the diameter D4 of the path T4 traversed by the at least one blade 44 of the at least one second mixing train 4 is such that said at least one blade 44 passes close to the periphery 22 of the tank 2 .
  • the entire surface of the bottom of the fixed tank 2 will be swept by the blades 34, 44 of the first 3 or of at least one second 4 mixing train, which guarantees a homogeneous mixture of materials in the tank 2 during the mixing process. operation of the mixing device 1.
  • the diameter D4 of the path T4 traveled by the at least one blade 44 of the at least one second mixing train 4 is strictly less than the diameter D3 of the path T3 traveled by the at least one blade 34 of the first mixing train 3.
  • the difference between the diameter D3 and the diameter D4 can be greater than or equal to the difference between the diameter D6 of the first ring 6 and the diameter D7 of the second ring 7.
  • the drive shafts 31 of the first 3 and of at least one second 4 mixing train being arranged on the rotary plate 5 so that the blades 34, 44 of each of the mixing trains 3, 4 n ' do not collide during the rotation of the mixing trains 3, 4.
  • the entire surface of the bottom of the fixed tank 2 will be swept by the blades 34, 44 of the first 3 or of at least one second 4 mixing train during the operation of the mixing device 1, which allows that all of the materials present in the tank 2 are mixed simultaneously.
  • a homogeneous mixture of materials is guaranteed, without the blades 34, 44 of the first and at least one second mixing train 3, 4 colliding with each other during their respective paths in the fixed tank 2 .
  • the first ring gear 6 has teeth 61 on its outer periphery 62 or on its inner periphery 63, with which the pinion 32 of the first mixing train 3 engages.
  • the second ring gear 7 has teeth 71 on its outer periphery 72 or on its inner periphery 73, with which the pinion 42 of at least one second mixing train 4 engages.
  • the volume of the tank 2 is greater than or equal to 3 m 3 .
  • the mixing apparatus 1 is particularly suitable for ensuring the mixing of a large quantity of materials, in that it makes it possible to provide a plurality of mixing trains 3, 4, and in particular of second trains. mixing 4, so that all the materials in the fixed tank 2 are mixed simultaneously, which makes it possible to obtain a homogeneous mixture.
  • said mixing apparatus 1 comprises at least two second mixing trains 4.
  • the kneading apparatus 1 thus comprises at least three kneading trains 3, 4, which are distributed substantially regularly around the axis A of the tank 2, so that all the materials in the tank 2 are mixed simultaneously, during the operation of said mixing device 1.
  • a first mixing train 3 and at least four second mixing trains 4. Therefore, so that all of the materials located in the fixed tank 2 are mixed simultaneously, during the operation of said mixing device 1, there can be advantageously provided a third toothed circular ring (not shown in the figures) with a diameter strictly greater than the diameter D6 of the first ring 6 and the diameter D7 of the second ring gear 7, with which at least one pinion of a second mixing train 4 engages.
  • the various mixing trains are dimensioned so that their blades do not collide during the operation of the mixing apparatus 1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Claims (11)

  1. Mischgerät (1) für feuchte oder trockene Materialien, insbesondere Komponenten für die Betonherstellung, umfassend:
    - einen feststehenden Behälter (2) in zylindrischer Form mit einer Achse (A)
    - ein erstes Rührwerk (3), umfassend eine Antriebswelle (31) mit einer Achse (B), die mit einem Ritzel (32) versehen ist, das zentriert auf der Achse (B) der Antriebswelle (32) befestigt ist, und mindestens eine Rührschaufel (34), wobei die Schaufel (34) um die Achse (B) der Antriebswelle (31) in einer kreisförmigen Bahn (T3) mit dem Durchmesser (D3) läuft,
    - mindestens ein zweites Rührwerk (4), umfassend eine Antriebswelle (41) mit einer Achse (C), die mit einem Ritzel (42) versehen ist, das zentriert auf der Achse (C) der Antriebswelle (41) befestigt ist, und mindestens eine Rührschaufel (44), wobei die Schaufel (44) um die Achse (C) der Antriebswelle (41) in einer kreisförmigen Bahn (T4) mit dem Durchmesser (D4) läuft,
    - einen Drehteller (5), zentriert auf der Achse (A) des Behälters (2), der um die Achse (A) des Behälters (2) in Drehung versetzt wird, wobei der Drehteller (5) die Antriebswelle (31, 41) von jeder des ersten (3) und des mindestens einen zweiten (4) Rührwerks aufnimmt, wobei das Mischgerät ferner Folgendes umfasst:
    - einen ersten umlaufenden Zahnkranz (6) mit dem Durchmesser (D6), zentriert auf der Achse (A) des Behälters (2) und unbeweglich in Bezug auf den Behälter (2), und
    - einen zweiten umlaufenden Kranz (7) mit dem Durchmesser (D7), zentriert auf der Achse (A) des Behälters (2), so dass der Durchmesser (D7) strikt größer als der Durchmesser (D6) ist,
    das Ritzel (33), das auf der Antriebswelle (31) des ersten Rührwerks (3) befestigt ist und mit dem ersten umlaufenden Kranz (6) in Eingriff steht, und das Ritzel (43), das auf der Antriebswelle (41) des mindestens einen zweiten Rührwerks (4) befestigt ist und mit dem zweiten umlaufenden Kranz (7) in Eingriff steht, dadurch gekennzeichnet, dass der zweite umlaufende Zahnkranz (7) unbeweglich in Bezug auf den Behälter (2) ist.
  2. Mischgerät (1) nach Anspruch 1, umfassend eine Zuführleitung (21), die unterhalb des Behälters (2), zentriert auf der Achse (A) des Behälters angeordnet ist.
  3. Mischgerät (1) nach Anspruch 1 oder 2, wobei das erste Rührwerk (3) einen Arm (33) mit einer Länge (L33), der senkrecht auf der Antriebswelle (32) und zentriert auf der Antriebswelle (32) angebracht ist, zwei Schaufeln (34), die auf der Ebene von jedem Ende des Arms (33) befestigt sind, umfasst und das zweite Rührwerk (4) einen Arm (43) mit einer Länge (L43), der senkrecht auf der Antriebswelle (42) und zentriert auf der Antriebswelle (42) angebracht ist, zwei Schaufeln (44) des mindestens einen zweiten Rührwerks (4), die auf der Ebene von jedem Ende des Arms (43) befestigt sind, umfasst.
  4. Mischgerät (1) nach Anspruch 3, wobei die Länge (L33) des Arms (33) des ersten Rührwerks (3) strikt größer als die Länge (L43) des Arms (43) des mindestens einen zweiten Rührwerks (4) ist.
  5. Mischgerät (1) nach einem der Ansprüche 1 bis 4, wobei der Durchmesser (D3) der Bahn (T3), die von der mindestens einen Schaufel (34) des ersten Rührwerks (3) durchlaufen wird, derart ist, dass die mindestens eine Schaufel (34) durch die Achse (A) des Behälters (2) geht.
  6. Mischgerät (1) nach einem der Ansprüche 1 bis 5, wobei der Durchmesser (D4) der Bahn (T4), die von der mindestens einen Schaufel (44) des mindestens einen zweiten Rührwerks (4) durchlaufen wird, derart ist, dass die mindestens eine Schaufel (44) nahe des Umfangs (22) des Behälters (2) vorbeigeht.
  7. Mischgerät (1) nach einem der Ansprüche 1 bis 6, wobei der Durchmesser (D4) der Bahn (T4), die durch die mindestens eine Schaufel (44) des mindestens einen zweiten Rührwerks (4) durchlaufen wird, strikt innerhalb des Durchmessers (D3) der Bahn (T3), die durch die mindestens eine Schaufel (34) des ersten Rührwerks (3) durchlaufen wird, liegt, und die Differenz zwischen dem Durchmesser (D3) und dem Durchmesser (D4) größer oder gleich der Differenz zwischen dem Durchmesser (D6) des ersten Kranzes (6) und dem Durchmesser (D7) des zweiten Kranzes (7) ist, wobei die Antriebswellen (31, 41) des ersten (3) und des mindestens einen zweiten (4) Rührwerks auf dem Drehteller (5) derart angeordnet sind, dass die Schaufeln (34, 44) von jedem der Rührwerke (3, 4) während der Rotation der Rührwerke (3, 4) nicht kollidieren.
  8. Mischgerät (1) nach einem der Ansprüche 1 bis 7, wobei der erste Kranz (6) eine Verzahnung (61) auf seinem Außenumfang (62) oder auf seinem Innenumfang (63) umfasst, mit dem das Ritzel (32) des ersten Rührwerks (3) in Eingriff steht.
  9. Mischgerät (1) nach einem der Ansprüche 1 bis 8, wobei der zweite Kranz (7) eine Verzahnung (71) auf seinem Außenumfang (72) oder auf seinem Innenumfang (73) umfasst, mit dem das Ritzel (42) des mindestens einen zweiten Mischerarms (4) in Eingriff steht.
  10. Mischgerät (1) nach einem der Ansprüche 1 bis 9, wobei das Volumen des Behälters (2) größer oder gleich 3 m3 ist.
  11. Mischgerät (1) nach einem der Ansprüche 1 bis 10, umfassend mindestens zwei zweite Rührwerke (4).
EP19165308.8A 2018-04-09 2019-03-26 Mischgerät für feuchte oder trockene materialien, insbesondere komponenten für die betonherstellung Active EP3552788B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1853058A FR3079770B1 (fr) 2018-04-09 2018-04-09 Appareil de malaxage pour materiaux humides ou secs, notamment de composants pour la fabrication de beton

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EP3552788A1 EP3552788A1 (de) 2019-10-16
EP3552788B1 true EP3552788B1 (de) 2020-08-19

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FR (1) FR3079770B1 (de)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115431409B (zh) * 2022-09-02 2023-12-15 黄淮学院 一种砂浆自动化搅拌设备
CN116351289B (zh) * 2023-05-29 2023-08-18 无锡氟士德防腐科技有限公司 化学品材料搅拌储罐

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Publication number Priority date Publication date Assignee Title
FR2527939B1 (fr) * 1982-06-04 1985-12-06 Couvrot Laine Cie Malaxeur a cuve fixe
DK118393D0 (da) 1993-10-21 1993-10-21 Skako As Blandemaskine
DE102008033644A1 (de) * 2008-07-17 2010-01-21 Elba-Werk Maschinen-Gesellschaft Mbh Vorrichtung und Verfahren zum Mischen von Beton
DE102014008067A1 (de) * 2014-05-27 2015-12-03 Ammann Elba Beton GmbH Vorrichtung zum Mischen von Beton

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* Cited by examiner, † Cited by third party
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FR3079770B1 (fr) 2020-03-27
EP3552788A1 (de) 2019-10-16

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