EP1122047A1 - Verbesserte Mischbecher - Google Patents

Verbesserte Mischbecher Download PDF

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Publication number
EP1122047A1
EP1122047A1 EP01400233A EP01400233A EP1122047A1 EP 1122047 A1 EP1122047 A1 EP 1122047A1 EP 01400233 A EP01400233 A EP 01400233A EP 01400233 A EP01400233 A EP 01400233A EP 1122047 A1 EP1122047 A1 EP 1122047A1
Authority
EP
European Patent Office
Prior art keywords
propeller
trough
flap
edge
mixing
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.)
Withdrawn
Application number
EP01400233A
Other languages
English (en)
French (fr)
Inventor
Rabaud
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.)
Rabaud SAS
Original Assignee
Rabaud SAS
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 Rabaud SAS filed Critical Rabaud SAS
Publication of EP1122047A1 publication Critical patent/EP1122047A1/de
Withdrawn legal-status Critical Current

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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
    • B28C5/14—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 horizontal or substantially horizontal axis
    • B28C5/141—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 horizontal or substantially horizontal axis with container tiltable or elevatable for emptying
    • 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
    • B01F27/1143—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections screw-shaped, e.g. worms
    • 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
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/72—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices
    • B01F27/726—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices with two helices with opposite pitch on the same shaft; with two helices on the same axis, driven in opposite directions or at different speeds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/50—Movable or transportable mixing devices or plants
    • B01F33/502—Vehicle-mounted mixing devices
    • 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
    • B01F35/45—Closures or doors specially adapted for mixing receptacles; Operating mechanisms therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/60—Safety arrangements
    • 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
    • B28C5/14—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 horizontal or substantially horizontal axis
    • B28C5/142—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 horizontal or substantially horizontal axis the stirrer shaft carrying screw-blades

Definitions

  • the present invention relates to mixing buckets which allow the preparation of products of all kinds and more particularly in the public works, the mixing buckets used for manufacture and distribution of concrete.
  • This type of equipment is generally associated with a handling machine to which it is linked by an appropriate coupling of the three-point coupling type or other.
  • This bucket in the shape of a trough, contains a motorized mixing screw. Its connection system with the machine allows it to be placed in position normal mixing and in this position the opening of the trough is substantially horizontal. It can also be placed in the loading position; in this case the trough is tilted and its front face acts as a shovel.
  • Filling the trough with basic ingredients such as sand and / or gravel can be done directly. Indeed, the trough being in tilted position, horizontally, the machine can take sand from a pile, gravel or whatever. The cement can then be introduced into the trough, by the opening, and preferably through a protective grid which covers this opening and on which the operator can deposit and open his or her cement bags.
  • the mixing operation is carried out by means of a very particular which has two propellers of different diameters but concentric, and whose threads are not inverted. This mixture is discharged preferably through an opening in the bottom of the trough.
  • the present invention provides improvements which allow improve the efficiency of this type of equipment.
  • the invention therefore relates to a mixing bucket consisting essentially on the one hand, of a trough provided with an opening, one side of which forms the leading edge of the wall acting as a shovel, which trough is provided in its lower part, opposite to said opening, a drain flap, and, on the other hand, a mixing screw of the type with two propellers or turns of different but concentric diameters and whose steps are reversed: an internal propeller mounted on the drive shaft and an external propeller mounted on said internal propeller, which external propeller has a direction which allows the emptying of the products stirred in the trough by said hatch; this bucket also has a retractable protective grid located on the opening.
  • this bucket is characterized in that the external propeller consists of several overlapping blades each fixed on the internal propeller by means of a lug whose characteristic is to form a dihedron with the general surface of the blade; the edge of this dihedron is substantially radial and is located along the length of the peripheral strip of the blade, and in particular in an area upstream of its length which is between 1/6 th and 1/3 of the length of said strip, in order to balance the forces exerted on said blade so as to limit its deformation.
  • each blade of the external propeller has - a continuous peripheral band which truly constitutes the portion of propeller, with an external edge which follows the contour of the surface from the bottom of the trough, - a veil which extends towards the center of the propeller, the downstream end of said blade to the edge of the dihedral, and - the tab of fixing which extends upstream of said edge.
  • the downstream part forming the peripheral strip of the blade has at least one fold which gives said downstream part a pitch greater than the pitch of the upstream part of the strip device constituting the propeller, in order to accelerate the movement of produced in the bottom of the trough at the end of each blade.
  • the upstream part of the peripheral band constituting the propeller is shaped in a point shape to improve the penetration of the blade in the products, and especially for avoid jamming of materials and in particular gravel between the end of the blade and the wall of the trough.
  • the blades forming the propeller external are angularly offset from each other, by a angle between 110 and 120 °.
  • the internal helix of the screw of mixing consists of sheet metal sectors, fixed on the central shaft of the screws, which sectors are shaped at their ends to allow their assembly with respect to each other, which assembly is carried out on a radiant portion of a few centimeters, between 3 and 8 cm for example, which portion gives the internal propeller a continuous periphery of a end to end of the tree.
  • each constituent sector of the internal propeller represents approximately 1/3 of circumference and it is made up a flat sheet, the ends of which, at the peripheral strip, are folded, forming a dihedral, the edge of which is substantially perpendicular to the radiant portion where the assembly of two adjacent sectors is located.
  • the grid acting as a hatch, above the mixing screw extends over the entire opening of the trough and it consists of two flaps which are integral with one of the another by means of a joint and which are foldable one on the other; one of the flaps, that located on the front wall of the trough, is articulated on the front edge of the opening and it is operated by means of an appropriate member of the hydraulic cylinder type; the other flap is, on the one hand, articulated on the first flap by means of a hinge situated between their adjacent sides and, on the other hand, guided by means of at least one connecting rod which extends between one of the sides of said flap and the corresponding side wall of the trough.
  • the choice of a grid formed by two components makes it possible to have a large opening, while benefiting from a small footprint of this grid or hatch in the open position, during the sand and / or gravel loading operation.
  • the anchoring and articulation points of the connecting rod that holds the second flap are arranged so that they cause almost complete clearance of the opening when the first flap is operated by the jack, which flaps are found in a folded position one on the other, in the extension of the wall front of the trough.
  • the connecting rod is articulated on the side wall of the trough, at a point which is situated approximately halfway down the flap anterior when the latter is in the closed position, and it is articulated on the front flap at a point located substantially 1/3 of the length of this flap front, length taken from the joint interposed between the two shutters.
  • the mixing bucket includes, conventionally, a trough 1 which consists of two side walls 2 and 3 and a wall 4 with a U-shaped section, the front or rear part of which is equipped with a coupling system 5 cooperating with a handling; we also notice feet 6 arranged at the bottom of the U-shaped wall, which allow the bucket to be placed on the ground in a normal mixing position, i.e. with its opening partly upper facing up.
  • a trough 1 which consists of two side walls 2 and 3 and a wall 4 with a U-shaped section, the front or rear part of which is equipped with a coupling system 5 cooperating with a handling; we also notice feet 6 arranged at the bottom of the U-shaped wall, which allow the bucket to be placed on the ground in a normal mixing position, i.e. with its opening partly upper facing up.
  • the shaft 11 of this screw is driven for example by means of a motor hydraulic 12 visible in Figure 2, via a transmission suitable housed on the side of the wall 3, in a casing 13.
  • the lower part 41 of the trough and of the wall 4 is shaped as half cylinder shape.
  • the front wall 42 of the trough extends from the semi-cylindrical part 41 up to the level of the upper rim 14 which forms the anterior side of the trough opening.
  • the front wall 43 of the trough extends between the semi-cylindrical part 41 and the edge 15 of the opening, which edge 15 is parallel to the front edge 14. This wall 43 and its edge 15 in fact form the part which constitutes the bucket shovel and which allows by appropriate manipulation of the bucket, to take products in a pile of sand or gravel for example.
  • the mixing screw 9 has a first propeller 19 which is secured to the shaft 11 and a second propeller which is made up of several blades 20 fixed on the periphery of the first propeller 19.
  • the mixing screw 9 will be detailed later in conjunction with the figures 3 to 6.
  • the internal propeller 19, the pitch of which is reversed with respect to that of the blades 20, tends to bring the products away from the orifice of drain 16, that is to say on the side of the drive housing 13.
  • the operator has to pour one or more bags of cement directly in the trough.
  • the opening of the trough is covered with a grid 25 on which the operator can very well put down his bag.
  • This protective grid has the particularity of being made up of two flaps 26 and 27.
  • the flap 26 or anterior flap is articulated in its part rear on an axis 29 located above the front edge 14 of the trough.
  • This flap 26 is operated by means of a jack 30.
  • This jack 30 is interposed between, on the one hand, a yoke 31 mounted in the center of the part upper of the front wall 42, on a reinforcing beam 32, and other part, a yoke 33 disposed at the end of the flap 26, that is to say on the side 34 of this flap, that which is located substantially in the center of the opening of the trough.
  • the second flap 27 is articulated by means of hinges 37 on the flap anterior 26 and in particular on its side 34.
  • the movement of the flap 27 is controlled by means of the side rods 39 which are interposed between the walls 2 and 3 and the lateral sides 44 of the part 27.
  • Each connecting rod 39 is articulated on the sides or sides 2 and 3 of the trough at their upper part, around an axis 47 which, as shown in FIG. 2, is located approximately halfway along the side 49 of the flap 26 when it is in closed position.
  • the other end of the connecting rod 39 is articulated around an axis 50 which about 1/3 the length of the sides 44, from the end front of said flap 27, that is to say the end where the hinges are located 37.
  • each of the flaps 26 and 27 is a coarse grid meshes. Note on the flap 27, saw teeth 51 which allow tear a bag like a bag of cement to simplify the opening operation for the person responsible for emptying his bag of cement or other in the trough 4.
  • the articulation axes 47 and 50 of the connecting rods 39 are positioned such that when the jack 30 is actuated to operate the flap 26, the flap 27 folds down and folds over said flap 26, releasing as much as possible the opening of the trough which facilitates its filling and particularly the removal of products from a pile of sand or gravel by example.
  • the length of the flap 26, taken relative to the walls 2 and 3 of the trough, is significantly lower than that of the flap 27.
  • the flap 27 rests actually on the edges 22 and 23 of the sides 2 and 3, at its ends, and on the side or edge 15.
  • the flap 26 fits between the sides 2 and 3, with a minimum of play.
  • Figure 3 shows the shaft 11 of the mixing screw on which is mounted the first propeller 19.
  • This first propeller 19 consists of a assembly of sectors 55 which each cover approximately the equivalent of 1/3 in circumference, with the exception of the end sectors 56 and 57 which are particular in the sense that they are shaped to fit the contours and trough shapes at each of its ends.
  • These sectors 55 are in the form of a flat sheet metal part shaped so that it can be welded at its central part on the shaft 11 and to marry, by its external edge 60 a volume which is less than the overall volume of the bottom of the trough as determined by the semi-cylindrical portion 41 of wall 4.
  • the edge 60 is continuous between the two ends of the propeller 19. This continuity is constant over a radial height of several centimeters, from 3 to 8 cm for example.
  • the sectors are fixed at an angle on the shaft 11 and their ends adjacent are assembled on a portion 61 which extends along a radius starting from the tree 11. It is this radial portion 61 which can have a length from 3 to 8 cm for example.
  • the adjacent sectors 55 are assembled at this portion 61 by folding their ends 62, which ends 62 form with the general surface of sectors 55 a dihedral and the edge 63 of this dihedral is substantially perpendicular to the radial portion 61.
  • Figure 4 shows from another angle, the assembly of two adjacent ends 62 of sectors 55.
  • Figure 5 shows the complete mixing screw i.e. its internal propeller 19 and blades 20 forming the external propeller, mounted on said propeller 19.
  • the envelope of the outer propeller corresponds to the semi-cylindrical casing of the bottom of the trough 4.
  • the blades 20 overlap, that is to say that the space swept by each of them is partially taken up by the following blade.
  • the angular difference between two consecutive blades 20 is less than 120 °, it is for example between 113 and 116 °. This angular shift promotes mixing.
  • the blades 20 are shaped in a piece of sheet metal. They have - a peripheral strip 120 which truly constitutes the propeller portion, - a central sail 121 and - a fixing lug 122.
  • the blades 20 are preferably removable; they are assembled by their tab 122 on sectors 55 by means of bolts not shown.
  • peripheral strip 120 and the web 121 are located substantially in the same general flat surface while the tab 122 is folded by relative to the web 121, forming a dihedral whose edge 123 is substantially radial, that is to say it passes close to the axis of the shaft 11.
  • the angle of the dihedral at the edge 123 depends on the pitch given to each propeller; it is of the order of 135 ° for example.
  • peripheral strip 120 extends beyond the edge 123, on the side of the tab 122, that is to say in the upstream part of the blade.
  • the portion 124 of the strip 120, which is located upstream of the edge 123, has a length which is for example between 1/3 and 1/6 of the length total of said strip, so that said edge 123 is also located in a zone Z which extends in the same proportion.
  • the upstream end of part 124 of the peripheral strip is shaped into a point.
  • This point 125 avoids the jamming of the aggregates between the blade and the wall of the trough.
  • This point 125 also constitutes a wear indicator for the blades.
  • the downstream end of the peripheral strip 120 may include as detailed in Figure 6, two folds which give the downstream end of the paddles a step progressively larger than the rest of the strip peripheral.
  • the axis 127 is located approximately at a distance from the end downstream 129 of the strip 120 which corresponds to 1/8 of the length of the said bandaged.
  • the axis 126 is located for example at a distance from the axis 127 which is the order of 1 ⁇ 4 of the total length of the strip 120.
  • the first blade 20 ' located at the end of the shaft 11 on the side of the transmission, is fixed directly by means of a lug 130 on the shaft 11.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
EP01400233A 2000-01-31 2001-01-30 Verbesserte Mischbecher Withdrawn EP1122047A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0001332A FR2804361B1 (fr) 2000-01-31 2000-01-31 Perfectionnements aux godets malaxeurs
FR0001332 2000-01-31

Publications (1)

Publication Number Publication Date
EP1122047A1 true EP1122047A1 (de) 2001-08-08

Family

ID=8846597

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01400233A Withdrawn EP1122047A1 (de) 2000-01-31 2001-01-30 Verbesserte Mischbecher

Country Status (2)

Country Link
EP (1) EP1122047A1 (de)
FR (1) FR2804361B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPR20090010A1 (it) * 2009-03-02 2010-09-03 M3 Metalmeccanica Moderna Societa A Responsabilit Benna per macchine movimento terra
EP2586522A1 (de) * 2011-10-27 2013-05-01 Etablissements Emily Ladekübel, der mit Schaufeln mit einfahrbaren Kratzern ausgestattet ist
DE102016002644A1 (de) * 2016-03-04 2017-09-07 Klaus Stewering Gmbh & Co Kg Hydraulisch angetriebener Zwangsmischer

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU199421U9 (ru) * 2020-06-25 2020-10-16 федеральное государственное бюджетное образовательное учреждение высшего образования "Белгородский государственный технологический университет им. В.Г. Шухова" Устройство для перемешивания материалов
FR3108548B1 (fr) 2020-11-03 2022-03-25 Franck Greuet Dispositif d’alimentation d’eau adaptable sur tous types de godets malaxeurs
CN113085002A (zh) * 2021-04-14 2021-07-09 杭州鼎昌混凝土有限公司 高强度自密实混凝土的无尘雾化喷浆混合系统及其方法
CN113524449B (zh) * 2021-09-17 2022-03-01 山东圆友重工科技有限公司 一种高标号混凝土搅拌混合装置
RU210799U1 (ru) * 2021-12-21 2022-05-05 федеральное государственное бюджетное образовательное учреждение высшего образования "Белгородский государственный технологический университет им. В.Г. Шухова" Лопастной смеситель материалов

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1104199A (en) * 1965-08-13 1968-02-21 Stork & Co Nv Improvements in and relating to a worm for conveying mining material
IT1210783B (it) * 1987-06-03 1989-09-20 Merlo Ind Metalmecc Dispositivo miscelatore a coclea particolarmente per la miscelazione di aggregati solidi
DE9110138U1 (de) * 1991-08-16 1992-01-09 Gerhard Eckart Maschinenbau, 8300 Landshut Mischschaufel
EP0724940A2 (de) * 1995-02-03 1996-08-07 Ditta Porello G. Battista Einrichtung zum Mischen und Fördern von Schüttgütern
FR2759621A1 (fr) * 1997-02-20 1998-08-21 Rabaud Sa Godet malaxeur

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1104199A (en) * 1965-08-13 1968-02-21 Stork & Co Nv Improvements in and relating to a worm for conveying mining material
IT1210783B (it) * 1987-06-03 1989-09-20 Merlo Ind Metalmecc Dispositivo miscelatore a coclea particolarmente per la miscelazione di aggregati solidi
DE9110138U1 (de) * 1991-08-16 1992-01-09 Gerhard Eckart Maschinenbau, 8300 Landshut Mischschaufel
EP0724940A2 (de) * 1995-02-03 1996-08-07 Ditta Porello G. Battista Einrichtung zum Mischen und Fördern von Schüttgütern
FR2759621A1 (fr) * 1997-02-20 1998-08-21 Rabaud Sa Godet malaxeur

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPR20090010A1 (it) * 2009-03-02 2010-09-03 M3 Metalmeccanica Moderna Societa A Responsabilit Benna per macchine movimento terra
EP2226429A2 (de) * 2009-03-02 2010-09-08 M3 Metalmeccanica Moderne Societa' A Responsabilita'Limitata Schaufel für Erdbewegungsmaschine.
EP2226429A3 (de) * 2009-03-02 2010-09-29 M3 Metalmeccanica Moderne Societa' A Responsabilita'Limitata Schaufel für Erdbewegungsmaschine.
EP2586522A1 (de) * 2011-10-27 2013-05-01 Etablissements Emily Ladekübel, der mit Schaufeln mit einfahrbaren Kratzern ausgestattet ist
DE102016002644A1 (de) * 2016-03-04 2017-09-07 Klaus Stewering Gmbh & Co Kg Hydraulisch angetriebener Zwangsmischer

Also Published As

Publication number Publication date
FR2804361A1 (fr) 2001-08-03
FR2804361B1 (fr) 2002-05-03

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