EP3189889B1 - Mischvorrichtung - Google Patents

Mischvorrichtung Download PDF

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Publication number
EP3189889B1
EP3189889B1 EP16205608.9A EP16205608A EP3189889B1 EP 3189889 B1 EP3189889 B1 EP 3189889B1 EP 16205608 A EP16205608 A EP 16205608A EP 3189889 B1 EP3189889 B1 EP 3189889B1
Authority
EP
European Patent Office
Prior art keywords
mixing
container
arms
tool
central 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.)
Active
Application number
EP16205608.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3189889A1 (de
Inventor
Stefan Soiné
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.)
IREKS GmbH
Original Assignee
IREKS 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 IREKS GmbH filed Critical IREKS GmbH
Publication of EP3189889A1 publication Critical patent/EP3189889A1/de
Application granted granted Critical
Publication of EP3189889B1 publication Critical patent/EP3189889B1/de
Active 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
    • B01F27/114—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections
    • B01F27/1145—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections ribbon shaped with an open space between the helical ribbon flight and the rotating 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
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/19—Stirrers with two or more mixing elements mounted in sequence on the same axis
    • B01F27/192—Stirrers with two or more mixing elements mounted in sequence on the same axis with dissimilar elements
    • B01F27/1921—Stirrers with two or more mixing elements mounted in sequence on the same axis with dissimilar elements comprising helical elements and paddles
    • 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
    • B01F27/21—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by their rotating shafts
    • B01F27/2122—Hollow shafts
    • 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
    • B01F27/61—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis about an inclined 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
    • B01F29/40—Parts or components, e.g. receptacles, feeding or discharging means
    • B01F29/401—Receptacles, e.g. provided with liners
    • B01F29/402—Receptacles, e.g. provided with liners characterised by the relative disposition or configuration of the interior of the receptacles
    • B01F29/4022—Configuration of the interior
    • 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
    • B01F29/80—Mixers with rotating receptacles rotating about a substantially vertical axis
    • B01F29/85—Mixers with rotating receptacles rotating about a substantially vertical axis with helices, e.g. rotating about an inclined axis

Definitions

  • the invention relates to a mixing device for mixing mixed material, such as dry and / or moistened solids and / or liquids, with a container rotatably mounted about a vertical axis for receiving the mixed material with an opening and one reaching through the opening into the container and rotatable about an axis of rotation Mixing tool with at least one mixing helix in order to transport the material to be mixed upwards essentially along a container wall of the container, the axis of rotation of the mixing tool being inclined to the vertical axis of the container during operation.
  • mixed material such as dry and / or moistened solids and / or liquids
  • Such a mixer is for example in the DE 29 02 570 C2 described.
  • the mixer has a container which tapers downwards and which is closed by a lid rotatably mounted on the container.
  • a screw rotatably arranged in the container is held eccentrically on the lid and extends obliquely to the central axis and parallel to the side wall of the container in the direction of the container bottom, which is designed as a cone-shaped tapering upwards.
  • a device for mixing powdery substances is known, with a container for receiving the material to be mixed and a mixing tool in the form of a mixing screw on a screw shaft.
  • the container has an outlet for the material to be mixed at its lower end.
  • the mixing screw conveys the mix from the lower end to the upper end of the container.
  • the worm shaft is designed hollow and provided with nozzles to introduce liquid or plastic substances under pressure into the interior of the vessel.
  • the worm shaft In order to guide the worm shaft close to the container wall, it is designed in two parts, with the individual parts being coupled via an articulated coupling. At the bottom of the container, which is flat, as well as at the upper end of the worm shaft, it is rotatably mounted centrally on the container. At the lower end or part of the screw this has a stirring or baffle in the form of an L-shaped arm, which is arranged directly above the bearing of the screw shaft.
  • the disadvantage here is that, particularly in the area of storage, there is an accumulation of material that is not effectively mixed.
  • the two-part design of the shaft is also difficult because it makes an additional bearing point in the lower container area necessary.
  • the system is not suitable for mixing devices in which the container is provided not only as a mixing container but also as a transport container that can be removed from the mixing device.
  • a mixing device is inefficient for industrial use because the agitator is also removed when the mixing container is removed.
  • the mixing device described therein comprises a mixing vessel which widens conically upwards and rotates about its central axis and which comprises two helical stirring members which protrude obliquely and on opposite sides of the vessel wall into the vessel.
  • a whirling device is provided in the center of the bottom of the container, which consists of a hub rotatably mounted in the container bottom, which comprises an injection tube provided concentrically with a nozzle and mixing arms.
  • the container bottom extends from the side wall in the direction of the center of the container initially at an angle upwards and then merges into a steeply upwardly extending dome on which the hub is rotatably mounted is.
  • the mixing arms are arranged at the upper end of the hub and thus at a distance from the container bottom
  • JP S57 140630 A describes a mixing tool for a mixing device for mixing mixes.
  • the mixing tool has a mixing helix in order to transport mixed material upwards along a container wall.
  • Several mixing arms are provided on a central shaft, which are guided along the floor by rotation.
  • EP 0 125 392 A2 discloses a mixing device according to the preamble of claim 1.
  • the object of the present invention is to propose a mixing device which has more efficient mixing properties in the bottom area of the container. Furthermore, the mixing device should have a simpler structure. This object is achieved by the features of claim 1.
  • the container bottom is conical and that the mixing tool carries a plurality of mixing arms at an end directed towards the container bottom of the container, one end of which is attached to a central shaft of the mixing tool and which are guided along the floor by rotation of the mixing tool, wherein at least one of the mixing arms has a free-standing end on the side facing away from the central shaft.
  • the at least one mixing arm is free-standing at the other end which is opposite the one end which is fastened to the central shaft and, for example, not fastened to the mixing helix. It extends from the central shaft in the direction of the container wall and ends in a section which in particular does not carry the mixing helix. It can be distinguished from a holding arm. Holding arms are provided on the central shaft in order to hold the mixing helix at a distance from the central shaft. They are attached to the central shaft at one end and the mixing helix at the other end.
  • the conical bottom is designed in such a way that it tapers upwards or tapers to a point upwards and effectively guides the material to be mixed in the direction of the mixing helix or mixing arms.
  • the rotate Mixing arms at an angle to the container axis.
  • a mixing arm and a section of the container bottom run past one another or pass one another and then move away from one another again.
  • a floor section and a mixing arm are sequentially guided past one another by the additional mixing arms. Deposits or even sticking to the floor are excluded.
  • a floor section and a mixing arm pass each other at a very short distance so that the material on the floor is effectively displaced by this.
  • the mixing arms move past the floor in quick succession, this sensitive area is better mixed and material accumulations in the floor area are efficiently avoided. There is therefore no time for the mix to settle.
  • the additional mixing arms have a reinforcing effect with regard to the mixing efficiency and act as a kind of booster that reinforces the mixing effect before the material is transported up through the helix.
  • the mixing tool preferably ends at a distance from the ground so that abrasion is avoided. The mixing tool thus protrudes into the interior of the container only from above.
  • the mixing arms can be guided along at a distance from the floor which can preferably be 3 mm to 20 mm. In contrast to other constructions, the construction of the mixing device is significantly simplified.
  • the mixing arm construction differs from the mixing helix in particular in that the mixing arms do not extend helically around the central shaft.
  • the mixing arms can extend radially outward or in the direction of the container wall from the central shaft of the mixing tool. It is also possible for the mixing arms to be offset from the central shaft so that the extension of the mixing arm or its longitudinal axis runs at a distance from the axis of rotation of the central shaft and does not intersect it.
  • the container is designed in such a way that it tapers conically downwards towards the container bottom.
  • the container base is the opening through which the material to be mixed can be introduced and via which the mixing tool is also introduced into the container so that it floats above the base.
  • the container can be connected to a drive which rotates the container about its vertical axis.
  • the upper end of the conical bottom converges with the vertical axis of the container, which can also be the axis of rotation of the container.
  • the container bottom can have the shape of a triangle, at least in sections.
  • the number of mixing arms is preferably greater than the number of mixing spirals. This ensures that the mix is whirled up before it is transported upwards through the helix.
  • the mixing arms create turbulence effects between the spirals, which further improve the mixing result.
  • the rapid sequence of the mixing arms compared to a mixing helix comes into play here in particular and can cause considerable turbulence.
  • the mixing arms preferably converge in a common section of the central shaft. They can be distributed around the central shaft in a conical plane corresponding to the conical bottom, so that the mixing arms open into the central shaft at an angle, that is not perpendicular to the rotary shaft.
  • the section of the central shaft that carries the mixing arms can directly adjoin the helix or mixing helix.
  • the helix can accordingly extend in the axial direction of the mixing shaft up to the section that carries the mixing arms.
  • An advantageous embodiment provides the helix in one to let the mixing arms end. This means that at least one of the mixing arms is also designed as a holding arm.
  • the mixing tool can be attached to the container lid. This preferably carries the drive for the mixing tool.
  • the mixing tool can be mounted and / or supported on the container lid and extend from the direction of the upper container opening in the direction of the container bottom without being supported on the latter. Due to the inclined arrangement of the mixing tool, the axis of rotation of the mixing tool moves away from the vertical or central and / or rotational axis of the container in the direction of the container opening.
  • the mixing tool can be designed as a mixing screw and have one or more helically upwardly extending spirals which transport the material from the lower end of the mixing vessel to the upper end of the mixing vessel. Ideally, the helix is designed in such a way that when the central shaft rotates it moves along the inner container wall or inner jacket surface of the container and transports the material to be mixed upwards.
  • the mixing helix can be designed to be continuous in the axial direction of the central shaft. However, it can also be divided into individual helical segments spaced apart from one another, similar to an interrupted worm thread.
  • the proposed mixing device is particularly suitable for mixing powdery, granular, pasty and / or liquid material to be mixed and can be used with great efficiency, for example, in dough production.
  • the mixing tool preferably has at least six in the circumferential direction of the central shaft Has evenly distributed mixing arms. As indicated above, these can be attached to the central shaft and extend outward in a star shape. In particular, adjacent mixing arms can each have the same angular distance from one another.
  • the mixing arms can be designed so that a flat underside of the mixing arms is guided on the floor. According to a further embodiment of the invention, the underside of the mixing arms is guided past the conical surface of the container bottom in parallel or past a section of the conical surface of the container bottom.
  • the mixing arms have an inclined surface in the direction of rotation provided for operation.
  • the inclined surface can be formed on a front section of the mixing arms and form the front or a frontal section of the mixing arms when the central shaft rotates.
  • the mixing arms can have a profiled, in particular sharp, acute-angled edge so that the frontal section of the mixing arms extends at an angle of less than 90 ° to the bottom or to the top of the mixing arms. In particular, this prevents unmixed and compacted materials from settling on the bottom of the container.
  • Other pointed shapes of the front are also possible, whereby the mixing arms can move through the mix like a knife and provide additional homogenization of the mix.
  • the at least one helix can be arranged at a distance from the central shaft.
  • the mixing tool can thus have at least one holding arm which connects the lower end of the mixing helix to the central shaft.
  • holding arms which extend outward in the radial direction from the central shaft can be the helix hold.
  • the holding arms can also contribute to mixing.
  • at least one mixing arm can be designed as a holding arm for the at least one helix, so that the helix ends at a distance from the central shaft.
  • the mixing tool in particular the central shaft, has a passage and at least one nozzle or the like for feeding gases, liquids or solids into the container.
  • additional loosening air can be passed through the mixing tool and introduced into the mix. This ensures that the mixing components are completely mixed.
  • the loosening air can also generate additional turbulence, which further increases the mixing effect.
  • At least one of the mixing arms has such a nozzle at its outer end for feeding gases, liquids or solids into the container.
  • the introduction of substances at the outermost point of the circular path, which the mixing arm describes, guarantees that areas of the container that are difficult to reach, in particular the outermost edge of the container bottom, are mixed thoroughly.
  • a mixing tool for a mixing device for mixing mixed material is also described.
  • the features and embodiments described herein in relation to the mixing tool of the mixing device apply equally to the mixing tool.
  • Particularly suitable mixing devices are those which have a container rotatably mounted about a vertical axis, in which the mixing tool extends into the container at an angle to the vertical axis of the container, and in which the container bottom is conical. Further developments, advantages and possible applications of the invention can also be found in the following description of an exemplary embodiment and the drawings.
  • Figure 1 shows part of a mixing device 1 for mixing mixed material with a mixing container 2 with a vertical or central axis 3.
  • the container 2 has an opening 4 through which the container 2 can be filled with mixed material.
  • a cover 5 that can be attached to the container 1 is arranged over the opening 4.
  • the mixing tool 7 is rotatably mounted in a drive unit 8 in the cover 5.
  • the drive unit 8 drives the mixing tool 7 during operation in a rotational manner about an axis of rotation 9 running through the longitudinal axis of the mixing tool 7.
  • the drive unit 8 is firmly attached to the cover 5 so that the mixing tool 7 can also be removed from the container 2 by lifting the cover 5.
  • Such covers are called mixer bells.
  • the mixing tool 7 protrudes from the cover 5 into the interior 10 or mixing space of the container 2 and extends to the container bottom 11, where the mixing tool 7 ends at a distance from the container bottom 11 so that the mixing tool 7 is not supported on the container bottom 11. Furthermore, the mixing tool 7 is arranged at an angle to the vertical axis 3 of the container 2.
  • the mixing tool 7 carries two mixing spirals 12, which extend helically around the axis of rotation 9 at a distance from a central shaft 13 of the mixing tool 7 from the lower end of the mixing tool 7, which faces the container bottom 11, upwards towards the cover 5.
  • the container 2 comprises a downwardly extending cylindrical section 14 of a container wall 15.
  • the cylindrical section 14 merges into a container section 16 that tapers towards the container bottom 11, the container wall 15 in this section at an angle to the vertical axis 3 of the container 2 is inclined.
  • the outer sections of the spirals 12 are guided along the inside of the inclined container wall section 16 during the rotation of the mixing tool 7, whereby, due to their helical shape, they transport mixed material in the container 2 upwards from the container bottom 11 and mix it thoroughly.
  • the container bottom 11 is conical. Starting from corner regions or an edge region 17 in which the container wall 14 merges into the container bottom 11 and in which the lowest point of the container interior 10 lies, the container bottom 11 extends upwards in a tapered manner.
  • the container 2 is rotatably mounted about the vertical axis 3 via a bearing 18.
  • a drive 19 drives rollers which engage the underside of the container 2 and through which the container 2 is driven to rotate about its vertical axis or axis of rotation 3 for the mixing process.
  • the mixing tool 7 ends at a distance from the container bottom 11 in a section which has a number of mixing arms 20.
  • the mixing arms 20 extend, starting from the central shaft 13, essentially in the radial direction outward, but are arranged slightly offset from the axis of rotation 9. The arrangement of the mixing arms 20 on the central shaft 13 also results from the perspective view in FIG Figure 2 .
  • the Figure 2 shows the lower end of the mixing tool 7.
  • six mixing arms 20 are connected to the central shaft 13.
  • the mixing arms 20 extend in a star shape from the mixing shaft 13 and each have the same angular spacing from the adjacent mixing arm.
  • Four of the mixing arms 20 have a free-standing end.
  • two mixing spirals 12 are mounted on the mixing tool 7.
  • the mixing spirals 12 are arranged at a distance from the central shaft 13, the mixing spirals 12 being connected to the central shaft 13 via holding arms 21.
  • the holding arms 21 provide an additional mixing effect.
  • the Figure 3 shows the distal end of the mixing tool 7 in an enlarged view.
  • two essentially opposite mixing arms 20 are designed as holding arms for the lower end of the mixing spirals 12, the mixing spirals 12 ending at the rear of the holding arms 20. This ensures better intake of the mix.
  • the direction of rotation of the mixing tool 7 about the axis 9 provided for operation is indicated by the arrow 22 drawn there.
  • the front section 23 of the mixing arms 20 has a profiled edge with an inclined surface 24. The mixing arm 20 thus cuts through the material to be mixed in the manner of a knife when the mixing tool 7 rotates.
  • a nozzle 25 is arranged, which with a not shown Air passage in the central shaft 13 is connected so that air or other gases or solids and the like can be introduced through the central shaft 13 and the mixing arm 20 from the nozzle 25 into the material to be mixed.
  • the mixing tool 7 rotates about the axis of rotation 9, while the container 2 rotates about its axis of rotation 3.
  • one of the mixing arms 20 passes a section of the conical container bottom 11 at the in the Figure 1
  • the right side of the container bottom 11 shown here.
  • the mixing arms are guided at a distance 26 from the surface of the container bottom 11.
  • the number of mixing arms 20 is greater than the number of mixing spirals 12.
  • the nozzles 25 are directed into the corner region 17 of the container bottom 11. This leads to material accumulations in this sensitive area that would otherwise not be mixed being whirled up and directed into the mixing area.
  • the nozzles 25 thus provide additional turbulence which significantly improves the mixing result.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
EP16205608.9A 2016-01-05 2016-12-21 Mischvorrichtung Active EP3189889B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016100153.8A DE102016100153A1 (de) 2016-01-05 2016-01-05 Mischvorrichtung und Mischwerkzeug

Publications (2)

Publication Number Publication Date
EP3189889A1 EP3189889A1 (de) 2017-07-12
EP3189889B1 true EP3189889B1 (de) 2020-09-23

Family

ID=57614185

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16205608.9A Active EP3189889B1 (de) 2016-01-05 2016-12-21 Mischvorrichtung

Country Status (3)

Country Link
EP (1) EP3189889B1 (es)
DE (1) DE102016100153A1 (es)
ES (1) ES2836130T3 (es)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111773977A (zh) * 2020-07-24 2020-10-16 张建华 一种有机硅生产用搅拌装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE707621C (de) 1939-11-13 1941-06-27 Johannes Ewardus Nauta Vorrichtung zum Mischen von pulverfoermigen Stoffen
NL157510B (nl) 1973-06-15 1978-08-15 Nautamix Patent Ag Menginrichting.
CH637033A5 (de) 1978-12-22 1983-07-15 Baumgartner Rolf Ag Konus-schneckenmischer.
JPS57140630A (en) * 1981-02-21 1982-08-31 Nippon Kayaku Co Ltd Continuous emulsifying apparatus
DE3314727C2 (de) * 1983-04-22 1986-08-21 Werner & Pfleiderer, 7000 Stuttgart Mischer
KR100538640B1 (ko) * 1999-06-02 2005-12-22 삼성엔지니어링 주식회사 탱크형 반응기용 임펠라 및 이를 사용한 반응기
DE102011085010A1 (de) * 2011-10-21 2013-04-25 Thomas Kainz Rührwerk für einen Fermenterbehälter, Fermenterbehälter mit einem derartigen Rührwerk sowie Biogasanlage
FR3000906B1 (fr) * 2013-01-15 2015-03-06 Skako Concrete Melangeur a cuve conique tournante

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
ES2836130T3 (es) 2021-06-24
EP3189889A1 (de) 2017-07-12
DE102016100153A1 (de) 2017-07-06

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