EP0323375B1 - Mobile d'agitation pour appareils de mélange de produits pulvérulents, pâteux ou granuleux - Google Patents

Mobile d'agitation pour appareils de mélange de produits pulvérulents, pâteux ou granuleux Download PDF

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Publication number
EP0323375B1
EP0323375B1 EP88420436A EP88420436A EP0323375B1 EP 0323375 B1 EP0323375 B1 EP 0323375B1 EP 88420436 A EP88420436 A EP 88420436A EP 88420436 A EP88420436 A EP 88420436A EP 0323375 B1 EP0323375 B1 EP 0323375B1
Authority
EP
European Patent Office
Prior art keywords
blade
rotation
blade root
axis
angle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88420436A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0323375A1 (fr
Inventor
Alain Bouchez
Patrice Cognard
Gérard Marie
Alain Schmidt
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.)
Moritz SA
Original Assignee
Moritz SA
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 Moritz SA filed Critical Moritz SA
Priority to AT88420436T priority Critical patent/ATE79786T1/de
Publication of EP0323375A1 publication Critical patent/EP0323375A1/fr
Application granted granted Critical
Publication of EP0323375B1 publication Critical patent/EP0323375B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
    • B01F27/1123—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades sickle-shaped, i.e. curved in at least one direction
    • 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
    • B01F35/90—Heating or cooling systems
    • B01F35/95—Heating or cooling systems using heated or cooled stirrers
    • 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
    • B01F35/90—Heating or cooling systems
    • B01F2035/99—Heating

Definitions

  • the invention relates to the technical field of mixing, stirring, kneading, stirring, in a neutral or reactive atmosphere, under relative pressure and / or under relative temperature, of pulverulent, pasty or granular products, in an enclosure of confinement.
  • the mixing or stirring of pulverulent, pasty or granular products or compositions is carried out inside containers, vats or enclosures, generally closed and crossed locally by a drive shaft on which is fitted a stirring mobile composed of 'a hub and a specified number of blades.
  • One of the first possibilities concerns the profile of the blades to improve the vigorous stirring of the products contained in the container or the tank of the apparatus and to avoid the creation of preferential movement veins. It was found that the number of blades of the agitator did not make it possible to solve this problem which had to be taken into account for the particular conformation of the blades.
  • Another objective is to improve the resistance of the blades to intense mechanical forces, increasing with the increase in the drive torque and the viscosity of the products to be brewed.
  • Another objective is the regulation of the internal temperature, at the heart, of the products or of the composition during brewing, either to avoid a rise in temperature resulting from the friction due to brewing, or, on the contrary, to supply or take calories favoring an intimate reaction in a neutral or reactive atmosphere.
  • the invention also relates to an apparatus for mixing pulverulent, pasty or granular products, comprising a container, tank or enclosure, locally traversed by a motor shaft on which is adapted a stirring mobile in accordance with the invention.
  • Fig. 1 is a schematic sectional elevation illustrating a stirring, mixing or kneading apparatus equipped with a stirring mobile in accordance with the invention.
  • Fig. 2 is a plan section taken along line II-II of FIG. 1.
  • Fig. 3 is a plan view showing, on a larger scale, one of the constituent elements of the stirring mobile, as illustrated in FIGS. 1 and 2.
  • Fig. 4 is a side elevation, taken substantially along the line IV-IV of FIG. 3.
  • Fig. 5 and fig. 6 are sectional elevations taken, respectively, along the lines VV and VI-VI of FIG. 3.
  • Fig. 7 is a plan view, on a larger scale, similar to FIG. 1 and illustrating constructive details of the subject of the invention.
  • Fig. 8 is a partial section taken on the line VIII-VIII of FIG. 4.
  • FIGs. 1 and 2 show an apparatus 1 for stirring, mixing, stirring, kneading or reacting a product or a pulverulent, pasty or granular composition.
  • Such an apparatus 1 comprises a tank, a container or an enclosure 2, for example but not exclusively, of spherical shape, which is carried by a structure 3.
  • the tank 2 is crossed, for example at the level of its flat bottom 4, by the output shaft of a geared motor group 5 can be of any suitable type.
  • the output shaft is associated with a sealing box 6, of the rotary joint type, connected to a 7- way circuit and to a 8-way circuit, connected to an installation, not shown, capable of maintaining the circulation of '' a heat transfer fluid.
  • the part of the motor shaft, protruding inside the tank 2, supports a stirring mobile 9 comprising a hub 10 from which extend blades 11 which, in a known manner, are shaped to follow closely the portion corresponding to the inner face 2a of the vessel 2, before which they operate by the rotated mobile 9 via the drive shaft 5 driven by the group.
  • the stirring mobile 9 is shown provided with three blades 11, but it should be considered that a different number could also be provided.
  • the object of the invention relates, essentially, to the structure of the blades 11 , with the exclusion of the constitution of the hub 10 which must be considered to be part of the known prior art, as regards its mechanical connection function with the drive shaft and its transfer or transit function of the heat transfer fluid passing through the circuits 7 and 8 via the box 6.
  • Each blade 11 is formed, according to FIGS. 3 and 4, to include a base 12 capable of allowing a removable attachment to the hub 9, while being centered on the axis of rotation x-x ' of the latter.
  • the fixing base 12 can be constituted by a crown sector 13 capable of being fixed by means of screws 14 ensuring a radial immobilization and axial.
  • An effective angular hold, capable of ensuring the rotational drive, for example in the direction of the arrow f1 is established by the presence of a key partially engaged in a housing 15 open from the interior surface of the sector of crown 13.
  • the mounting base 12 carries, from its outer peripheral surface, a blade root 16 whose general axis y-y ' is substantially radial to the axis of rotation x-x'.
  • the longitudinal axis y-y ' is offset retrogradely with respect to the direction of the arrow f par , with respect to a pure radial direction centered on the axis x-x', by a value ⁇ of between 5 and 30 °.
  • the blade root 16 is extended by a blade segment 17 affecting a general shape of a semi-crescent whose width decreases from the attachment with the blade root 16 to the marginal edge 18.
  • the blade segment 17 follows the blade root 16 and rises by making, with respect to the axis x-x ', an angle ß which can be between 30 and 60 °.
  • the angle ß is around 45 °.
  • the blade segment 17, in the form of a semi-crescent, is turned or oriented in the retrograde direction relative to the direction of rotation according to the arrow f1, so that its convex edge, forming part of the leading edge 19 of the blade 11 , follows as closely as possible the corresponding part of the internal face 2a in front of which the blade 11 moves during rotation in the direction of the arrow f1.
  • the blade root 16 and the blade segment 17 are produced in the form of hollow boxes, being made from any suitable material.
  • the boxed shape retained has a triangular shape in substantially straight cross section.
  • Figs. 4 to 6 show, by way of example, that the blade root 16 and the blade segment 17 can be made in the form of a triangular box to have a wall 20, called the lower wall, forming the lower surface, a wall 21 forming the upper upper surface, in consideration of the direction of rotation according to the arrow f1, and a wall 22 forming posterior extrados with respect to the same direction of rotation.
  • the walls 20 to 22 are joined together to form the leading edge 19 between the lower surface 20 and the front upper surface 21, a stalling edge 23 between the front upper surface 21 and the rear upper surface 22 and an edge of leakage 24 between the posterior extrados 22 and the intrados 20.
  • the stall edges 23 and trailing 24 have, as shown in FIG. 3, a concave conformation.
  • the attachment to the base 12, for example by welding, of the blade root 16 extended by the blade segment 17, is carried out in such a way that the front upper surface 21 makes, with respect to a reference plane P perpendicular to the axis x-x ', an angle ⁇ which can be between 30 to 60 ° and preferably around 45 °.
  • This fixing is also carried out, so that the lower surface 20 makes, from its birth with the base 12 and along the blade and relative to the same reference plane P, an angle ⁇ , called clearance, of which the value can be between 10 and 20 ° and, for example, varying around 13 °.
  • the angle ⁇ is provided to avoid damaging the products being kneaded and to facilitate cleaning.
  • the blade segment 17 is shaped so that the anterior upper surface 21 undergoes, from birth with the blade root 16 to the marginal edge 18, a twist in the direction of the axis x-x '.
  • a twist can be expressed as a variation of the angle ⁇ taking, as illustrated from FIGS. 4 and 7, in the different successive planes P1 to P5, values close to 105, 95, 90, 60, and 30 ° measured, according to the plane considered, between the cutting edge of the upper surface 21 and the perpendicular p in the radial direction D joining the axis x-x ' at the intersection of said cutting edge with the leading edge 19.
  • the same reference coordinates make it possible to appreciate, in FIG . 7, the angle ⁇ between the lower surface 20 and the perpendiculars p .
  • the first, resulting from the boxed form, is intended to give it a particularly high mechanical strength, to make it withstand the stresses resulting from the application of the torque or the reaction presented by the more or less viscous nature of the products being mixed, stirring or kneading.
  • the triangular shape in a hollow box, also makes it possible to confer on the blade 11 a particularly high mechanical resistance to pressure variations likely to occur inside the tank 2, that is to say as a result of reaction of the products entering into the composition, either because of the maintenance of a relative pressure variation compared to the ambient.
  • the shape of the blade 11 is also chosen so that the part of the leading edge 19, defined by the blade root 16, assumes a scraping function relative to the bottom of the tank 2 and thus limits the stagnation of a mass of product material which is weakly stressed due to the relatively low linear speed of movement which is imparted to the product or to the material at a short distance from the hub 10.
  • the scraping function is also assigned to the assembly of the leading edge 19, due to the particular conformation of the blade 11 causing this leading edge to follow, as closely as possible, the corresponding part of the inner face 2a of the tank.
  • the particular shape of the blade 11 and, more particularly, that of a box with a triangular section, makes it possible to constitute, between the anterior 21 and posterior extrados 22, an edge 23 known as a stall, having the effect of creating a flow break for the material or the products previously taken care of by the upper surface 21.
  • a stall creates a turbulent movement, immediately after the edge 23 and promotes the mixing, kneading, mixing or homogenization of the products being treated.
  • the production in a box of the blade root 16 and of the blade segment 17 is completed by an internal partitioning constituted by walls 30 added by any suitable means.
  • the walls 30 assume a function of reinforcing the boxes and are, moreover, organized, as appears in FIGS. 5 and 8, to delimit, between them and inside the blade root 16 and the blade segment 17, channels or compartments 31 and 32 communicating with each other at the blade tip, to allow the circulation of a heat transfer fluid inside the latter.
  • the channels 31 and 32 are in relation to passages 33 and 34 which are formed in the fixing base 12, so as to coincide with complementary conduits presented by the hub 10.
  • the walls 30 could also be organized so as not to define that a go circuit in the case where the blades have porous orifices or not diffusion of a fluid in the products.
  • the blade root 16 and the blade segment 17 can be produced by assembling the walls 20 and 21, completed by assembling the partition walls 30 and finished by assembling the wall 22.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Manufacturing And Processing Devices For Dough (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
EP88420436A 1987-12-30 1988-12-27 Mobile d'agitation pour appareils de mélange de produits pulvérulents, pâteux ou granuleux Expired - Lifetime EP0323375B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88420436T ATE79786T1 (de) 1987-12-30 1988-12-27 Ruehrvorrichtung fuer mischapparate fuer pulverfoermige, teigige oder koernige produkte.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8718546 1987-12-30
FR8718546A FR2625449B1 (fr) 1987-12-30 1987-12-30 Mobile d'agitation pour appareils de melange de produits pulverulents, pateux ou granuleux

Publications (2)

Publication Number Publication Date
EP0323375A1 EP0323375A1 (fr) 1989-07-05
EP0323375B1 true EP0323375B1 (fr) 1992-08-26

Family

ID=9358581

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88420436A Expired - Lifetime EP0323375B1 (fr) 1987-12-30 1988-12-27 Mobile d'agitation pour appareils de mélange de produits pulvérulents, pâteux ou granuleux

Country Status (8)

Country Link
US (1) US4941750A (ja)
EP (1) EP0323375B1 (ja)
JP (1) JP2935845B2 (ja)
AT (1) ATE79786T1 (ja)
CA (1) CA1295325C (ja)
DE (1) DE3874114T2 (ja)
ES (1) ES2035355T3 (ja)
FR (1) FR2625449B1 (ja)

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DE59008085D1 (de) * 1990-01-04 1995-02-02 Bohle L B Pharmatech Gmbh Mischgranulator.
DE4226498A1 (de) * 1992-08-11 1994-02-17 Klein Schanzlin & Becker Ag Rührwerkspropeller
US5344235A (en) * 1993-01-21 1994-09-06 General Signal Corp. Erosion resistant mixing impeller
DE19636989B4 (de) * 1995-10-27 2010-08-26 Richard Frisse Gmbh Scher-/Mischwerkzeug
DE10006253A1 (de) * 2000-02-11 2001-08-16 Ekato Ruehr Mischtechnik Rührvorrichtung
NZ535344A (en) * 2002-02-16 2006-02-24 Nicholas J Method and apparatus for malting
DE20307458U1 (de) * 2003-05-13 2003-09-25 Ekato Rühr- und Mischtechnik GmbH, 79650 Schopfheim Vorrichtung zur Behandlung von Feststoffen
DE202006003390U1 (de) * 2006-03-03 2006-07-13 Mavag Ag Mischtrockner
CN103170279A (zh) * 2013-03-27 2013-06-26 印峰 一种改进的搅拌机用搅拌叶片
CN103223325A (zh) * 2013-05-07 2013-07-31 南通大力化工设备有限公司 反应釜机械搅拌器
CA2935483A1 (en) * 2013-12-30 2015-07-09 Artech S.R.L. Rotor for alimentary dough kneader machines
EP3164007B1 (en) * 2014-07-03 2018-09-12 Aktiebolaget Electrolux Household appliance mixing arrangement
WO2016000782A1 (en) 2014-07-03 2016-01-07 Aktiebolaget Electrolux Household appliance mixing arrangement
US10849308B2 (en) * 2014-08-15 2020-12-01 Aquilla Elfindale Pet sanitation device
US9913453B2 (en) * 2014-08-15 2018-03-13 Aquilla Elfindale Pet sanitation device
ES2759917T3 (es) * 2015-06-12 2020-05-12 De Longhi Appliances Srl Aparato con un dispositivo de mezcla para cocinar alimentos
CN106311046B (zh) * 2016-08-17 2018-11-06 新沂市芭缇雅商贸有限公司 一种齿轮式万能清洗液配制装置
CN106268448A (zh) * 2016-09-23 2017-01-04 重庆牧宇农业发展有限公司 家禽饲料搅拌装置及其刀具
GB2577030A (en) * 2018-03-13 2020-03-18 705 Srl Scraper blade
JP2020203256A (ja) * 2019-06-18 2020-12-24 セイコーエプソン株式会社 攪拌装置
DE102019124886A1 (de) * 2019-09-16 2021-03-18 EKATO Rühr- und Mischtechnik GmbH Rührorganvorrichtung

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Also Published As

Publication number Publication date
DE3874114D1 (de) 1992-10-01
CA1295325C (en) 1992-02-04
FR2625449A1 (fr) 1989-07-07
EP0323375A1 (fr) 1989-07-05
ATE79786T1 (de) 1992-09-15
FR2625449B1 (fr) 1991-05-10
DE3874114T2 (de) 1993-04-01
JP2935845B2 (ja) 1999-08-16
JPH01215337A (ja) 1989-08-29
ES2035355T3 (es) 1993-04-16
US4941750A (en) 1990-07-17

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