EP0584151B1 - Mischwerkzeug - Google Patents

Mischwerkzeug Download PDF

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Publication number
EP0584151B1
EP0584151B1 EP92910039A EP92910039A EP0584151B1 EP 0584151 B1 EP0584151 B1 EP 0584151B1 EP 92910039 A EP92910039 A EP 92910039A EP 92910039 A EP92910039 A EP 92910039A EP 0584151 B1 EP0584151 B1 EP 0584151B1
Authority
EP
European Patent Office
Prior art keywords
mixing
container
wall
mixing element
shaft
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
EP92910039A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0584151A1 (de
Inventor
Peter Wilson
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.)
Gebrueder Loedige Maschinenbau GmbH
Original Assignee
Gebrueder Loedige Maschinenbau 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
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Application filed by Gebrueder Loedige Maschinenbau GmbH filed Critical Gebrueder Loedige Maschinenbau GmbH
Publication of EP0584151A1 publication Critical patent/EP0584151A1/de
Application granted granted Critical
Publication of EP0584151B1 publication Critical patent/EP0584151B1/de
Anticipated expiration legal-status Critical
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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
    • B01F27/07—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
    • B01F27/0726—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis having stirring elements connected to the stirrer shaft each by a single radial rod, other than open frameworks
    • 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
    • B01F27/09—Stirrers characterised by the mounting of the stirrers with respect to the receptacle
    • B01F27/091—Stirrers characterised by the mounting of the stirrers with respect to the receptacle with elements co-operating with receptacle wall or bottom, e.g. for scraping the receptacle wall

Definitions

  • the invention relates to a mixing tool for the treatment of solids or individual solid components in a horizontally lying container with a concentrically arranged shaft, which is rotatably mounted in the container and carries several axially spaced mixing tools attached to the shaft, which are directed radially towards the inner wall of the container point out and end at a short distance in front of the inner wall of the container, the individual mixing tool having an arm and a mixing body composed of at least two plate-shaped mixing elements.
  • Such a mixing tool has become known from DE-B-11 22 355.
  • mixers with horizontally lying containers are known in which the material to be mixed is moved by mixing tools rotating with a shaft.
  • Ploughshare blades which have proven themselves in a wide range of applications, are primarily used as mixing bodies. These mixing tools can be used to produce multi-component mixtures of high mixing quality.
  • Plate-shaped mixing bodies are also known which have concave and / or convex surface sections. If strongly adhering products are mixed, dried or processed in another way in horizontally arranged mixers, dryers or reactors, it is known that a product layer can build up on the inside wall of the container is formed between the inner wall of the container and the end face of the mixing elements (product approach).
  • a larger gap between the mixing tools and the inner wall of the container arises because the shaft has a certain deflection due to its own weight, provided that the shaft is only rotatably supported at the shaft ends. Furthermore, a larger gap between the mixing tool and the inner wall of the container is also mandatory if the container wall is heated by means of an energy source. The container then undergoes a certain amount of deformation, which differs depending on the temperature and the material used for the container or for the shaft and for the mixing tool. It is therefore easy to see why there must be an enlarged gap between the mixing tool and the inner wall of the container, even when manufacturing mixers, dryers and reactors with high precision.
  • the product batch building up in the gap can harden, build up further and increase the energy consumption of the mixing tools.
  • the batch can flake off from time to time and thereby deteriorate the quality of the final mix.
  • Such a product batch is also overheated in dryers or reactors, that is to say the product itself is destroyed in the region of the inner wall of the container. In a reaction process, stoichiometric conditions can change uncontrollably.
  • the known mixing tool is therefore resiliently fastened in the product space in order to gap widths between the inner wall of the container and the end face of the Compensating the mixing tool This requires complex construction and is prone to malfunction in production.
  • a cleaning device for mixing or moving containers is known from US-A-2,320,976, which consists of harrow-like flexible blades.
  • the blades are staggered on rods that move the material to be mixed. With rotating bars, the blades lie flexibly under tension on the inner surface of the container and scrape off product batches from the inner wall. The blades are pivoted.
  • the invention has for its object to develop a mixing tool of the type mentioned in such a way that the product approach in the gap between the inner wall of the container and the mixing tool is largely avoided or can be removed reliably.
  • the mixing elements are arranged at least partially one behind the other in the circumferential direction and have cutouts at the free end pointing towards the inner wall of the container, which are offset from the first mixing element to the second mixing element, and that the cutouts in the front view are at least partially protrusions of the second mixing element are covered.
  • the mixing tool according to the invention thus has the essential advantage that it is possible with the mixing tool to be removed in narrow paths in the product build-up.
  • the power consumption of the shaft that carries the mixing tools can be kept low.
  • a protrusion is provided between the individual cutouts, which borders on the cutouts. By means of these projections, the product batch is torn open over a certain axial length.
  • the still existing product attachment strips are then removed from protrusions of the second mixing element. With the recesses arranged offset from one another on the mixing elements, it is ensured that the entire inner wall of the container is coated in the region of the plane of rotation of a mixing tool, and consequently permanent circular product attachment rings cannot occur.
  • the individual mixing tools also work together in such a way that the entire axial length of the inner wall of the container is covered.
  • the individual mixing elements are still exposed to lower moments and can therefore be manufactured in a reduced material thickness.
  • an end face of the mixing elements facing the inner wall of the container forms a wedge gap with the inner wall of the container.
  • the rear edges of the mixing elements are at a greater distance from the inner wall of the container than the front edges.
  • the mixing elements are spaced at different distances from the inner wall of the container, the product-specific behavior of the approach can be taken into account even more.
  • the mixing elements are also arranged obliquely to the arm of the mixing tool and in the plane of rotation of the mixing tool, so that a defined conveying characteristic of the product to be processed can take place in the container.
  • the product exchange in the container and thus the mixing quality or the yield can be improved with such an arrangement of the mixing elements.
  • the projections of the second mixing element are designed such that they describe the same orbit as the recesses of the first mixing element.
  • the first projections of the first mixing element are in the same association with the second recesses of the second mixing element.
  • the mixing elements aligned differently i. H. the mixing elements do not run exactly parallel one behind the other, the recesses of the first mixing element must be adapted to the projections of the second mixing element in such a way that they describe the same orbits on an inner wall of the container.
  • the mixing tool according to the invention thus corresponds to the expanded requirements in mixing technology.
  • With the trailing mixing element additional backmixing and thus better homogeneity of the end product can be achieved.
  • the power requirement compared to conventional mixing elements is lower. This is due to effects that are known per se.
  • the product emptying is improved and the granulation properties of the invention
  • Mixing tools are better than the mixing tools known from the prior art.
  • FIG. 1 shows in cross section a mixing tool 10 as it is arranged on a shaft 11 and in a container 12.
  • the mixing tool 10 projects radially from the shaft 11 toward a container inner wall 13.
  • the mixing tool 10 is composed of an arm 14 and a first mixing element 15 and a second mixing element 16.
  • the arm 14 of the mixing tool 10 is held in a pocket 17 which is attached to the shaft 11 in a rotationally fixed manner.
  • the arm 14 is to be fastened in the pocket 17 by means of fastening means which engage in bores 18, 18 '.
  • the first mixing element 15 has first recesses 19, 19 '19''which are offset from second recesses 20, 20' of the second mixing element. First projections 21, 21 ', 21''adjoin the first recesses 19, 19', 19 '' and protrude beyond the first recesses 19, 19 ', 19''. On the second mixing element 16, second projections 22, 22 ', 22''are provided which adjoin the second cutouts 20, 20'.
  • the recesses 19, 19 ', 19''and 20, 20' are offset from one another in such a way that in the case of the mixing elements 15, 16 arranged one behind the other, as seen in the circumferential direction, a recess 19 has a projection 22 of the second mixing element 16 assigned.
  • the mixing tool 10 moves along the inner wall 13 of the container.
  • a first gap 24 is formed between the first mixing element 15 and the inner wall 13 of the container, and a second gap 25 exists between the second mixing element 16 and the inner wall 13 of the container.
  • the mixing elements 15, 16 1 in an angled position relative to the arm 14 are arranged one behind the other in such a way that a first recess 19, 19 ', 19''interacts with a second projection 22, 22', 22 ''.
  • FIG. 2 shows a perspective view of a mixing tool 30 as it is assigned to an inner wall 31 of the container.
  • a mixing tool 30 is assigned to an inner wall 31 of the container.
  • only one container section is shown here, and the figure also does not show the shaft to which the mixing tool 30 can be fastened.
  • the mixing tool 30 has a first mixing element 33 and a second mixing element 34 on an arm 32.
  • the mixing tool 30 rotates in the direction of the arrow 35 on a circular path along the inner wall 31 of the container.
  • a product batch with points of different densities is shown schematically at 36 on the inner wall 31 of the container.
  • the inner wall 31 of the container 31 which is free of product is shown at 36 '.
  • First cutouts 37, 37 ', 37''are provided on the first mixing element 33 and second cutouts 38, 38' are provided on the second mixing element 34.
  • the first and second recesses 37, 37 ', 37'', 38, 38' are designed such that they have a first projection 39, 39 ', 39''and a second projection 40, 40', 40 '' of the first and second mixing elements 33, 34 can cooperate.
  • the displaced first and second projections 39, 39 ', 39''and 40, 40', 40 ''' product set 36 is removed in lanes from the container inner wall 31.
  • FIG. 3 shows a mixing tool 50 as it is assigned to a developed container section 51.
  • An arm 52 of the mixing tool 50 is shown without a shaft.
  • a first mixing element 53 and a second mixing element 54 are fastened to the arm 52.
  • the mixing elements 53, 54 sweep the inside of the container section 51.
  • First cutouts 56, 56 ', 56' 'of the first mixing element 53 and second cutouts 57, 57' of the second mixing element 54 are arranged offset to one another.
  • first projections 58, 58 ', 58' 'and second projections 59, 59', 59 '', a dotted product attachment 60 on the inside of the container section 51 is removed in axially short paths.
  • 61 shows the seamless inside of the container section 51 in the figure.
  • Fig. 4 shows a mixing tool 70 as it can be fastened in a horizontally lying container to a shaft mounted therein.
  • the mixing tool 70 is composed of an arm 71 and a first mixing element 72 and a second mixing element 73.
  • the second mixing element 73 is arranged behind the first mixing element 72.
  • Second recesses 75, 75 'are also provided on the second mixing element 73 and are arranged offset from the first recesses 74, 74', 74 '' of the first mixing element 72.
  • the mixing tool 70 can move in the direction of the arrows 78 when it is open a shaft is rotated attached.
  • the mixing tool 70 can be fastened to a shaft not shown in the figure via bores 79, 79 '.
  • End faces 80, 81 of the first and second mixing elements 72, 73 can form a wedge gap that opens against the direction of travel with an adjacent container inner wall.
  • the mixing elements 72, 73 are inclined to the plane of rotation.
  • the end faces 80, 81 of the mixing elements 72, 73 can be profiled in a wide variety of ways over the entire axial length of the mixer.
  • the cutouts and projections are rectangular. Different polygon shapes are conceivable both for the recesses and for the projections.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
EP92910039A 1991-05-11 1992-05-06 Mischwerkzeug Expired - Lifetime EP0584151B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4115496 1991-05-11
DE4115496A DE4115496A1 (de) 1991-05-11 1991-05-11 Mischwerkzeug
PCT/DE1992/000377 WO1992020440A1 (de) 1991-05-11 1992-05-06 Mischwerkzeug

Publications (2)

Publication Number Publication Date
EP0584151A1 EP0584151A1 (de) 1994-03-02
EP0584151B1 true EP0584151B1 (de) 1995-03-01

Family

ID=6431516

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92910039A Expired - Lifetime EP0584151B1 (de) 1991-05-11 1992-05-06 Mischwerkzeug

Country Status (7)

Country Link
US (1) US5407273A (ja)
EP (1) EP0584151B1 (ja)
JP (1) JPH07106313B2 (ja)
AT (1) ATE119068T1 (ja)
DE (2) DE4115496A1 (ja)
ES (1) ES2073300T3 (ja)
WO (1) WO1992020440A1 (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4425297C2 (de) 1994-07-18 1996-11-21 Loedige Maschbau Gmbh Geb Homogenisierungswerkzeug
US5523501A (en) * 1994-12-22 1996-06-04 E. I. Du Pont De Nemours And Company Catalytic hydrogenolysis
DE19600466A1 (de) * 1996-01-09 1997-07-10 Henkel Kgaa Verfahren zur Herstellung von granularen Wasch- oder Reinigungsmitteln bzw. Komponenten hierfür
DE19743923C2 (de) * 1997-10-04 2000-06-15 Loedige Maschbau Gmbh Geb Mischwerkzeug
JP4881652B2 (ja) * 2006-05-15 2012-02-22 梶原工業株式会社 攪拌羽根及び攪拌装置
CN103726431B (zh) * 2013-12-08 2016-02-24 广东易山重工股份有限公司 一种沥青石料混合搅拌加热釜的搅拌机构

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US739422A (en) * 1902-06-28 1903-09-22 Robert Vinton Jones Cooking utensil.
US969016A (en) * 1908-02-13 1910-08-30 Joseph Willmann Ice-cream freezer.
US1308819A (en) * 1918-05-10 1919-07-08 Borden S Condensed Milk Company Evaporating apparatus.
US2320976A (en) * 1940-12-12 1943-06-01 Armstrong Cork Co Cleaning device for mixing or agitating vessels
FR1001188A (fr) * 1946-03-22 1952-02-20 Agitateur
DE1122355B (de) * 1958-11-26 1962-01-18 Wilhelm Loedige Vorrichtung zum Mischen
GB882662A (en) * 1959-11-26 1961-11-15 Loedige Wilhelm Improvements relating to mixing machines
US3194504A (en) * 1962-09-07 1965-07-13 Patterson Ind Inc Mixing machine
DE2402891A1 (de) * 1973-01-31 1974-08-08 Frigomat S A S Di Cipelletti A Misch- und schabschnecke fuer diskontinuierliche speiseeismaschinen
US4095307A (en) * 1976-06-28 1978-06-20 Lox Equipment Company Scraper for a vessel interior surface
DE2739106C2 (de) * 1977-08-30 1985-02-28 Giusti International Ltd., London Vorrichtung zum Rühren einer feste Teilchen enthaltenden Flüssigkeit
US4199266A (en) * 1977-08-31 1980-04-22 Giusti Raolo B Processing vessels
DE3332069A1 (de) * 1983-09-06 1985-03-21 Hoechst Ag Ruehrer fuer wandnahes ruehren
DE3826039A1 (de) * 1988-07-30 1990-02-01 Henkel Kgaa Schlagmuehle
US4951262A (en) * 1989-04-18 1990-08-21 Halliburton Company Agitator and baffles for slurry mixing

Also Published As

Publication number Publication date
WO1992020440A1 (de) 1992-11-26
ATE119068T1 (de) 1995-03-15
DE59201554D1 (de) 1995-04-06
DE4115496A1 (de) 1992-11-12
DE4115496C2 (ja) 1993-03-04
EP0584151A1 (de) 1994-03-02
US5407273A (en) 1995-04-18
ES2073300T3 (es) 1995-08-01
JPH06503268A (ja) 1994-04-14
JPH07106313B2 (ja) 1995-11-15

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