EP3556525A1 - Mélangeur à bac annulaire - Google Patents

Mélangeur à bac annulaire Download PDF

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Publication number
EP3556525A1
EP3556525A1 EP19169269.8A EP19169269A EP3556525A1 EP 3556525 A1 EP3556525 A1 EP 3556525A1 EP 19169269 A EP19169269 A EP 19169269A EP 3556525 A1 EP3556525 A1 EP 3556525A1
Authority
EP
European Patent Office
Prior art keywords
swirler
vortex
mixing
ring trough
main axis
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Withdrawn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
EP19169269.8A
Other languages
German (de)
English (en)
Inventor
Dr. Angelo Schmandra
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.)
Liebherr Mischtecknik GmbH
Original Assignee
Liebherr Mischtecknik GmbH
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 Liebherr Mischtecknik GmbH filed Critical Liebherr Mischtecknik GmbH
Publication of EP3556525A1 publication Critical patent/EP3556525A1/fr
Withdrawn legal-status Critical Current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
    • B28C5/16—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
    • B28C5/163—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 in annularly-shaped containers
    • B28C5/165—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 in annularly-shaped containers 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
    • B01F27/808—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with stirrers driven from the bottom of the 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
    • B01F27/82—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
    • 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
    • B01F27/96—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with openwork frames or cages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2215/00—Auxiliary or complementary information in relation with mixing
    • B01F2215/04—Technical information in relation with mixing
    • B01F2215/0413—Numerical information
    • B01F2215/0418—Geometrical information
    • B01F2215/0431—Numerical size values, e.g. diameter of a hole or conduit, area, volume, length, width, or ratios thereof

Definitions

  • the invention relates to a Ringtrogmischer with a ring extending around a main axis mixing channel and with a mixer.
  • a specific form of mixing is dispersive mixing. Dispersion processes are required if undesired particle bonds in the form of agglomerations occur or occur in the mixing process.
  • An example of such a task is the production of high-strength and ultra-high-strength concretes.
  • so-called swirlers are used in ring trough mixers, which are typically occupied by rod-shaped elements. These penetrate the mixed material distributed in the mixer from top to near the mixing trough bottom.
  • a major challenge which also determines the cost-effectiveness of such processes, is to achieve the shortest possible mixing times. For this it is necessary to improve the efficiency of the mixing process.
  • the object of the invention is to provide a ring trough mixer with which such an increase in efficiency can be achieved.
  • the mixer has two or more swirler carriers rotatably mounted about the main axis, on each of which at least one swirler is arranged, and / or that exactly one swirler is arranged on each swirler carrier.
  • An embodiment with exactly two swirler carriers, corresponding to n 2, may be particularly preferred.
  • the two or more turbulence carriers are arranged at the same angular distance from one another. In the case of two swirler-carriers this would lead to an angular distance of 180 °, in the case of three swirler-carriers to an angular distance of 120 °, and so on.
  • corresponding turbulizers of different turbulence carriers and preferably all turbulizers are arranged at the same distance from the main axis.
  • corresponding swirlers of different swarm bearers are to be understood as meaning, for example, the innermost swarmers of all swarm carriers.
  • corresponding turbulizers of different turbulence carriers and preferably all turbulizers have the same vortex diameter D w .
  • D w is the diameter of that circle to be drawn in self-rotation of the swirler around the swirler axis of the movement of the outermost vortex element, such as a vortex bar.
  • the swirler or swirlers have one or more swirl rods, which are preferably arranged parallel to the swirling axis. For example, three, four or five vertebrae can be provided per swirler.
  • corresponding turbulizers of different turbulence carriers and preferably all turbulizers have the same number of vertebrae.
  • the proportion of the annular channel width detected by the swirlers is more than 0.75 and preferably more than 0.85.
  • the proportion of the annular channel width detected by the swirler is calculated using the formula 1 - [(G a + G i ) / B r ], wherein the outer gap width G a denotes the distance between the annular channel outer wall and the outer side of the swirler closest to the annular channel outer wall and the inner gap width G i the distance between the annular channel inner wall and the inside of the closest to the annular channel inner wall vortex reaching swirler.
  • the invention further relates to the use of a ring trough mixer according to the invention for dispersive mixing, in particular for mixing concrete.
  • Ring trough mixers with the geometries according to the invention are in particular for dispersive mixing, for example for the mixing of high-strength or ultrafine Stress beneficial. But also in other applications, there are favorable results.
  • ring trough mixers 1 generally comprise a cylindrical trough 2 with a trough inner radius R a , in the middle of which a cylindrical housing 3 with a housing outer radius R i is arranged, which receives the drive of the mixing plant.
  • the width B r of the arranged between the trough 2 and housing 3, annular mixing channel 4 results from the difference R a - R i .
  • the mixer comprises a set of swirler carriers 5 (in the examples shown two) and is designed so that the swirler carriers 5 can rotate in the operation of the swivel mixer at a rotational speed U u around the center axis of the trough 2 extending main axis A h .
  • a swirler 6 is arranged such that it can be rotated in the operation of the ring trough mixer with a swirler speed U w about its parallel to the main axis A h extending, own swirler axis A w .
  • the swirlers 6 thus revolve as rotating planets the annular mixing channel 4.
  • the swirler 6 each have one certain number of swirler bars 7 (in the examples shown four or five) and have a specific swirler diameter D w .
  • the swirler carriers 5 and swirler 6 are either synchronized via a transmission or can be driven separately from one another.
  • the swirlers 6 are operated at higher rotational speeds than the swirler carriers 5, as U w > U u .
  • the direction of rotation of the swirler 6 can be varied with separate drive. Also, the direction of rotation of the swirler 6 when using two or more swirly 6 also differ.
  • the distance between the trough wall and the outer side of the zoom reaching the next to the trough wall swirler is referred to herein as outer gap width G a and the distance between the housing wall and the inside of the zoom reaching the next to the housing wall swirler as the inner gap width G i.
  • the mixing channel width B r can be calculated from the formula 1 - [(G a + G i ) / B r ] of Proportion of the detected by the Whirler 6 ring channel width can be calculated. This proportion is typically less than 75% in prior art trough mixers.

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)
EP19169269.8A 2018-04-18 2019-04-15 Mélangeur à bac annulaire Withdrawn EP3556525A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018109175.3A DE102018109175A1 (de) 2018-04-18 2018-04-18 Ringtrogmischer

Publications (1)

Publication Number Publication Date
EP3556525A1 true EP3556525A1 (fr) 2019-10-23

Family

ID=66182432

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19169269.8A Withdrawn EP3556525A1 (fr) 2018-04-18 2019-04-15 Mélangeur à bac annulaire

Country Status (2)

Country Link
EP (1) EP3556525A1 (fr)
DE (1) DE102018109175A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2281329A (en) * 1940-06-29 1942-04-28 Herbert S Simpson Muller and motor driven agitator
FR1008483A (fr) * 1949-07-16 1952-05-19 Malaxeur de béton ou de matières similaires
DE2440809A1 (de) * 1974-08-26 1976-03-18 Hans Kimmel Ruehrwerkzeug fuer einen mischer oder ruehrer
US4132484A (en) * 1974-06-11 1979-01-02 Hans Kimmel Mixer, particularly heating-cooling mixer for chemical processes

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9100412U1 (fr) * 1991-01-15 1991-04-04 Kniele, Harald, 7952 Bad Buchau, De
DE9412699U1 (de) * 1994-08-05 1995-12-07 Liebherr Mischtechnik Gmbh Ringtragzwangsmischer
DE29505229U1 (de) * 1995-03-28 1995-05-24 Teka Maschinenbau Gmbh Vorrichtung zum Antreiben von Intensiv-Wirblern für Zwangsmischer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2281329A (en) * 1940-06-29 1942-04-28 Herbert S Simpson Muller and motor driven agitator
FR1008483A (fr) * 1949-07-16 1952-05-19 Malaxeur de béton ou de matières similaires
US4132484A (en) * 1974-06-11 1979-01-02 Hans Kimmel Mixer, particularly heating-cooling mixer for chemical processes
DE2440809A1 (de) * 1974-08-26 1976-03-18 Hans Kimmel Ruehrwerkzeug fuer einen mischer oder ruehrer

Also Published As

Publication number Publication date
DE102018109175A1 (de) 2019-10-24

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