EP0186457A2 - Turbinenmischer - Google Patents

Turbinenmischer Download PDF

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Publication number
EP0186457A2
EP0186457A2 EP85309300A EP85309300A EP0186457A2 EP 0186457 A2 EP0186457 A2 EP 0186457A2 EP 85309300 A EP85309300 A EP 85309300A EP 85309300 A EP85309300 A EP 85309300A EP 0186457 A2 EP0186457 A2 EP 0186457A2
Authority
EP
European Patent Office
Prior art keywords
inner rotor
drum
blades
concrete mixer
mixer according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP85309300A
Other languages
English (en)
French (fr)
Other versions
EP0186457A3 (de
Inventor
Robert Keith Tomlinson
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.)
Monier Ltd
Original Assignee
Monier Ltd
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
Priority claimed from AU51164/85A external-priority patent/AU573934B2/en
Application filed by Monier Ltd filed Critical Monier Ltd
Publication of EP0186457A2 publication Critical patent/EP0186457A2/de
Publication of EP0186457A3 publication Critical patent/EP0186457A3/de
Ceased 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
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/10—Maintenance of mixers
    • 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
    • B28C5/18—Mixing in containers to which motion is imparted to effect the mixing
    • B28C5/20—Mixing in containers to which motion is imparted to effect the mixing rotating about a horizontal or substantially horizontal axis during mixing, e.g. without independent stirrers
    • B28C5/24—Mixing in containers to which motion is imparted to effect the mixing rotating about a horizontal or substantially horizontal axis during mixing, e.g. without independent stirrers with driven stirrers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/07—Stirrers characterised by their mounting on the shaft
    • B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
    • B01F27/0724—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis directly mounted on the rotating axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F29/00—Mixers with rotating receptacles
    • B01F29/25—Mixers with rotating receptacles with material flowing continuously through the receptacles from inlet to discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F29/00—Mixers with rotating receptacles
    • B01F29/40—Parts or components, e.g. receptacles, feeding or discharging means
    • B01F29/403—Disposition of the rotor axis
    • B01F29/4033—Disposition of the rotor axis inclined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F29/00—Mixers with rotating receptacles
    • B01F29/60—Mixers with rotating receptacles rotating about a horizontal or inclined axis, e.g. drum mixers
    • B01F29/64—Mixers with rotating receptacles rotating about a horizontal or inclined axis, e.g. drum mixers with stirring devices moving in relation to the receptacle, e.g. rotating
    • 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
    • B01F35/10—Maintenance of mixers
    • B01F35/145—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means
    • 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
    • B01F35/50—Mixing receptacles

Definitions

  • This invention relates to a mixer which is useful as a concrete mixer, and in particular to a turbine mixer having a rotary drum.
  • the main object of this invention is to provide a continuous mixer wherein the cleaning requirement is less than with the batch type mixer which is presently used in production factories, and wherein there is also an improvement in concrete mixing, in throughput and in cost, and wherein cleaning is facilitated.
  • a mixer having a rotary drum which comprises a flexible member, an inner rotor with outstanding blades thereon, the flexible member, the inner rotor, and its blades all being of elastomeric material, the inner diameter of the flexible member being greater than the envelope diameter of the rotor blades, the mixer rotor being positionable within the flexible member with which its blades co-operate in the mixing of concrete, but being withdrawable therefrom for cleaning and maintenance purposes.
  • the blades can be so orientated that they cause the concrete mix to move forwardly at a rate which is not constant, and this is found to provide an exceedingly high speed mixing rate.
  • the amount of power required to operate the machine can be made quite small.
  • the invention consists of a main frame and a sub-frame, an inner rotor carried by the sub-frame and journalled for rotation with respect thereto, and comprising blades radially outstanding from its outer surface, a rotary drum assembly carried by the main frame and journalled for rotation with respect thereto, and comprising a flexible member, said inner rotor, its said blades and said drum flexible member all being of elastomeric material, guide means guiding the sub-frame for movement with respect to the main frame between a first position wherein the inner rotor is within the drum flexible member with which its blades co-operate in the mixing of concrete and a second position wherein the inner rotor is withdrawn therefrom, first drive means on a said frame coupled to the inner rotor for effecting rotational drive thereof, and second drive means on the main frame coupled to the rotary drum for effecting rotational drive thereof.
  • elastomeric material is found in itself to greatly facilitate the shedding of concrete which otherwise packs or builds up on surfaces within a mixer, but it is desired to reduce even more the building up of concrete on the surfaces than can be achieved by using fixed elastomeric material, as for example, an elastomeric sleeve cemented to the inner wall of the rotary drum, and in another aspect of this invention the inner member comprises an inflated body having a curved surface from which the blades project, and the drum flexible member is either an inner liner of the drum or an inflated annular member, so that there is a "live” effect which is found to be particularly effective in reducing adhesion of concrete to the surfaces.
  • the rotary drum assembly is supported by supporting wheels on a frame, and the frame comprises a swing away housing which, when released, enables immediate access to the rotary drum for maintenance purposes.
  • the entry end of the rotary drum assembly is provided with a part-conical ring which converges away from the rotary drum.
  • a rotary drum type mixer 10 is a relatively small mixer, being provided with an inner rotor assembly 11 and a rotary drum assembly 12.
  • the rotary drum assembly 12 comprises a generally cylindrical outer drum 13 which has a centrally located outstanding circular flange 14 engaged by idler rollers 15 to inhibit axial movement, otherwise the drum being supported on two driven rollers 16 set at "4.30" and “7.30” (referred to the hour hand of a clock), these rollers being provided with rubber tyres and being driven by a motor and gearbox combination 17 for rotation of the drum.
  • the drum 13 may be further retained in engagement with the rollers 16 (if required) by means of two additional guide rollers which are located at "10.30" and "1.30” (these locations being related to the hour hand of a clock for convenience of understanding).
  • the two upper guide rollers are carried however on a swing-away frame housing, the swing-away frame housing being an inverted "U" part of the housing having a hinge extending longitduinally on one lower edge and a latching arrangement on the other lower edge, the arrangement being such that upon lifting up the swing-away frame housing, the rotary drum assembly is immediately exposed to an operator for maintenance purposes. Since this arrangement is not commonly used, it is not illustrated herein.
  • the rotary drum 13 is a steel drum which, as said, is driven by the rollers 16, but this contains a driven flexible member 21 being an annular liner of rubber or other elastomeric material.
  • member 21 is inflated, but provides a generally cylindrical inner surface. On being inflated this inner surface is "live". In the embodiment illustrated herein, however, instead of use being made of inflation, the cylindrical liner 21 is connected to the outer drum 13 by a plurality of rubber straps 23. Each strap 23 is bolted to outer drum 24 by bolts 24, and vulcanised to the outer surface of the flexible liner 21. Each strap 23 is inclined with respect to the radius of the drum 13 and the liner 21, and the latter two members are generally concentric.
  • the entry end of the drum has secured to it a conical rubber lip (a "rubber cone") which converges beyond the entry end and this limits spillage from whatever charging means is used.
  • the rotary drum assembly 12 comprises an outer rotor, and the inner rotor assembly comprises a pair of hydraulic cylinders 27, the piston rods 28 of which extend beyond the entry end of the rotor assembly, and are joined by a transverse frame comprising a pair of spaced parallel plates 29 which between them support a motor/gearbox combination 30, and the gearbox output shaft 31 is secured to a central shaft 32 of the inner rotor assembly 11, by bolts 33, the central shaft being cantilevered.
  • the hydraulic cylinders 27 By actuation of the hydraulic cylinders 27, the whole rotor assembly can be withdrawn from the flexible liner 21 for cleaning purposes.
  • the inner rotor assembly 11 comprises an inner rotor 36 which is generally cylindrical but sealed at both ends.
  • the projecting end is sealed by an end cap 37 and has end wiper blades 38 which wipe the inner surfce of the part-conical lip 26, and a plurality of outstanding blades 39. All this part of the structure is of rubber, or elastomeric material with similar properties.
  • Low pressure air is introduced into inner rotor 36 through air hose 41, and caused by valve 'V' to pulsate alternately at about 1 p.s.i. and 3 p.s.i. (7 kPa and 21 kPa) to cause flexure of the cylindrical walls, which in turn causes shedding of concrete which might otherwise adhere.
  • the outstanding blades 39 are inclined such that they lie in a helical direction, but the helix angle varies for different blades so that the progress of particulate material through the rotary drum assembly is not a steady flow, but rather a flow of varying velocity which causes effective mixing.
  • the inner rotor 36 can be driven in the same rotational direction as a rotary drum 13, it is preferred to be driven in a contrary direction. It is also regarded as important that the rotary drum assembly should not be driven so fast that the particulate material is retained against the inner surface by centrifugal force, and that the inner rotor speed should be such that aeration of the mix does not occur.
  • the inner rotor rotates on an axis which is parallel to but displaced downwardly from the axis of rotation of the flexible inner liner 21, and at the bottom portion of their traverse, the blades 39 sweep the inner surface of the liner 21.
  • FIG. 2 there is a central space beneath the rotary drum assembly 12, and this will accommodate one end of a conveyor belt (if required). Such a conveyor belt would then carry away the mixed , material.
  • the rotor and stator can be separated immediately and the rotor can be cleaned by hand with much less effort than a batch mixer which would otherwise be required for the same throughput of concrete.
  • the cost is so low that it is feasible for a factory to be provided with a "stand by" mixer which can be used if the first mixer is required to be cleaned or to have maintenance work effected.
  • maintenance is reduced to be much less than the maintenance required for batch mixers of the type previously used.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Accessories For Mixers (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
EP85309300A 1984-12-20 1985-12-19 Turbinenmischer Ceased EP0186457A3 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AU8647/84 1984-12-20
AUPG864784 1984-12-20
AU51164/85A AU573934B2 (en) 1984-12-20 1985-12-12 Turbine mixer

Publications (2)

Publication Number Publication Date
EP0186457A2 true EP0186457A2 (de) 1986-07-02
EP0186457A3 EP0186457A3 (de) 1987-08-19

Family

ID=25629189

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85309300A Ceased EP0186457A3 (de) 1984-12-20 1985-12-19 Turbinenmischer

Country Status (1)

Country Link
EP (1) EP0186457A3 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0300715A1 (de) * 1987-07-20 1989-01-25 Monier Redland Limited Turbinenmischer für Beton
WO2019185234A1 (de) * 2018-03-24 2019-10-03 Siempelkamp Maschinen- Und Anlagenbau Gmbh Mischersystem

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2397323A (en) * 1943-01-19 1946-03-26 Julius F Trefz Method for making molding material
US2630301A (en) * 1950-11-16 1953-03-03 Kendrick W Lentz Rotary elastic drum blender
US2797903A (en) * 1955-07-19 1957-07-02 Universal Oil Prod Co Contacting vessel
DE1065381B (de) * 1959-09-17 Krauss-Maffei-Imperial G.m.b.H. >&. Co., München-Obermenzing Hubrührer
GB877247A (en) * 1960-01-25 1961-09-13 Us Stoneware Co Blending and apparatus therefor
US3211435A (en) * 1963-09-09 1965-10-12 Laszlo Steve Agitating means with air chamber and reciprocating pistons
GB1039758A (en) * 1962-05-15 1966-08-24 Farrel Corp Improvements in or relating to continuous mixers
US3273863A (en) * 1964-04-24 1966-09-20 Lodige Wilhelm Mixing apparatus
US3358973A (en) * 1966-09-26 1967-12-19 Jack M Mitchell Mixing apparatus
GB1198336A (en) * 1967-07-26 1970-07-08 Gunther Papenmeier Mixing Devices
US4158629A (en) * 1974-08-12 1979-06-19 Vernon D. Beehler Dynamic self-cleaning filter for liquids
EP0084359A2 (de) * 1982-01-15 1983-07-27 Hudelmaier, Ingrid Betonmischer mit Vibrator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3230912C1 (de) * 1982-08-19 1984-01-05 Hudelmaier, Ingrid, 7900 Ulm Betonmischer mit Vibrator

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1065381B (de) * 1959-09-17 Krauss-Maffei-Imperial G.m.b.H. >&. Co., München-Obermenzing Hubrührer
US2397323A (en) * 1943-01-19 1946-03-26 Julius F Trefz Method for making molding material
US2630301A (en) * 1950-11-16 1953-03-03 Kendrick W Lentz Rotary elastic drum blender
US2797903A (en) * 1955-07-19 1957-07-02 Universal Oil Prod Co Contacting vessel
GB877247A (en) * 1960-01-25 1961-09-13 Us Stoneware Co Blending and apparatus therefor
GB1039758A (en) * 1962-05-15 1966-08-24 Farrel Corp Improvements in or relating to continuous mixers
US3211435A (en) * 1963-09-09 1965-10-12 Laszlo Steve Agitating means with air chamber and reciprocating pistons
US3273863A (en) * 1964-04-24 1966-09-20 Lodige Wilhelm Mixing apparatus
US3358973A (en) * 1966-09-26 1967-12-19 Jack M Mitchell Mixing apparatus
GB1198336A (en) * 1967-07-26 1970-07-08 Gunther Papenmeier Mixing Devices
US4158629A (en) * 1974-08-12 1979-06-19 Vernon D. Beehler Dynamic self-cleaning filter for liquids
EP0084359A2 (de) * 1982-01-15 1983-07-27 Hudelmaier, Ingrid Betonmischer mit Vibrator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
TENSIDE DETERGENTS, vol. 9, no. 4, July/August 1972, pages 197-198 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0300715A1 (de) * 1987-07-20 1989-01-25 Monier Redland Limited Turbinenmischer für Beton
WO2019185234A1 (de) * 2018-03-24 2019-10-03 Siempelkamp Maschinen- Und Anlagenbau Gmbh Mischersystem

Also Published As

Publication number Publication date
EP0186457A3 (de) 1987-08-19

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Inventor name: TOMLINSON, ROBERT KEITH