EP0297099B1 - Teilchenmaterialmischung - Google Patents

Teilchenmaterialmischung Download PDF

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Publication number
EP0297099B1
EP0297099B1 EP19870901545 EP87901545A EP0297099B1 EP 0297099 B1 EP0297099 B1 EP 0297099B1 EP 19870901545 EP19870901545 EP 19870901545 EP 87901545 A EP87901545 A EP 87901545A EP 0297099 B1 EP0297099 B1 EP 0297099B1
Authority
EP
European Patent Office
Prior art keywords
elongate member
conveying means
blending
conveying
stirring members
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
EP19870901545
Other languages
English (en)
French (fr)
Other versions
EP0297099A1 (de
Inventor
John W. Cruse
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.)
Pharmakopius Ltd
Original Assignee
CRUSE John William
Pharmakopius 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
Application filed by CRUSE John William, Pharmakopius Ltd filed Critical CRUSE John William
Priority to AT87901545T priority Critical patent/ATE60273T1/de
Publication of EP0297099A1 publication Critical patent/EP0297099A1/de
Application granted granted Critical
Publication of EP0297099B1 publication Critical patent/EP0297099B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B28C5/1238—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 for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices
    • B28C5/1246—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 for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices with feeding devices
    • 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
    • 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
    • B01F27/114—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
    • B01F27/11451—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 forming open frameworks or cages

Definitions

  • This invention is concerned with a device for blending a mixture of particulate materials.
  • FR-A-2321319 discloses mixing apparatus particularly designed for building materials in which a helical rotor is rotated within a cylindrical casing to agitate and convey in-fed materials towards an outlet.
  • the rotors disclosed have a cage of rods surrounded by a helical flight which is flat on the side thereof facing the conveying direction.
  • What constitutes the invention is set out in the following claim 1 and is characterised by the cross-section of the elongate member in the conveying means of the blending device being of arcuate form at least on the side thereof facing the conveying direction of the conveying means, and the stirring members being located on the outside of the respective helical turns of the elongate member.
  • the pitch of the helically formed member is constant throughout its length and the elongate member is desirably of circular cross-section.
  • some of the stirring members are also located on the inside of the respective helical turns (i.e. between those turns and the axis of rotation of the conveying means).
  • the stirring members can, with advantage, be disposed parallel to the axis of the conveying means and an aligned series of stirring members extending from end to end of the conveying means can be provided by a single bar, rod or wire extending from the first turn to the last turn of the helically formed member.
  • Conveniently stirring members extending the full length of the helically formed member alternate in being secured inside and outside the helical turns.
  • the metering means can conveniently each also comprise a respective conveying means formed from an elongate member of at least part- arcuate cross-section helically disposed and mounted for rotation about its helical axis.
  • the conveying means in each metering conveying means is designed to run at a slower speed (e.g. one tenth of the speed of the blending conveying means) in a casing containing particulate material to a depth completely covering each turn of the elongate member at least at the inlet end of the metering conveying means.
  • the amount of material dispensed from each metering conveying means into the blending means can be adjusted by varying the speed of rotation and/or the pitch of the elongate member forming the conveying means.
  • a blending device may be used not only to blend the particulate materials, but also to blend a dosed minor proportion of liquid inert to the other components of the blend.
  • 'inert' is meant both chemically and physically inert including at least to the extent that it is not a solvent for any solid component of the blend.
  • the blending conveying means not only blends the components fed to it at its upstream end but conveys the mixture of particulate materials to the downstream end of the conveying means from whence it is discharged as a well blended mixture.
  • a cross-section of at least part arcuate form for the elongate member of the conveying means is important to the blending process.
  • a flat surface of the elongate member is presented in the conveying direction (e.g. a member of rectangular cross-section is used)
  • the material is liable to pack between the helical turns and the relative movement of the particules during their conveyance along the helical member, necessary to making a thorough blend, is inhibited.
  • each of the plurality of metering means also comprises a conveying helix in a casing
  • the elongate members forming these helices may be of any convenient cross-sectional shape (e.g. of flat, rectangular or round section).
  • the helical conveying means may be driven at correlated speeds to deliver appropriate proportions of particulate materials, or the pitches of the helices may be varied and all conveying means driven at similar speeds of rotation to achieve the same purpose.
  • a component is required to form only a small proportion of a final blend
  • Two streams of blended particulate materials may be obtained from a blending device in which the helix of the conveying means changes hand mid-way along its length.
  • a helical conveying means having only one drive but receiving metered materials onto each different handed length adjacent to the centre of the length delivers two blends, one from each end of the helical conveying means.
  • the blending device 10 shown in Figure 1 basically comprises an inefficient helical conveying means 12 moving particulate materials (with a great deal of "fall back” and “tumbling” in a blending section 13) from an input hopper 14 (via an input section 15) to a discharge chute 16 (via an output section 17).
  • the section 13 of the conveying means 12 should be several times as long as the section 15 (typically between five and ten times as long).
  • the conveying means 12 comprises an elongate member 18 of circular cross-section wrapped helically at constant pitch about a central drive shaft 19. At intervals along its length, the member 18 is braced to the shaft 19 by radial arms 20. A drive wheel 21 is mounted on one end of the shaft 19 so that, in use of the blending device, the shaft 19 rotates (typically at a speed in the range 100 to 150 rpm) in the direction shown by the arrow 22.
  • the conveying means 12 is embraced throughout its length by a casing 23 which matches the cross-section of the lower half of the conveying means 12 and supports the particulate materials being blended in a region where they are continually disturbed by the rotating turns of the member 18.
  • the depth of the layer of particulate material over the blending section 13 will be between one and two times the diameter of the cross-section of the member 18 (i.e. the lower part only of each turn of the helix is covered by the particulate material being blended).
  • stirring members are arranged between adjacent turns of the helix so that these are periodically moved through the shallow bed of material being conveyed towards the chute 16.
  • the stirring means can be rods (or wires) 25a, 25b extending parallel to the axis of the shaft 19 at least over the blending section 13 and conveniently over all three sections 13, 15 and 17.
  • One rod 25a can be located between turns inside each turn and the next rod 25b can be located between turns outside each turn.
  • the rods 25a, 25b can be attached (eg welded) to each turn or to just some of the turns as may be required to give a stable structure.
  • Figure 2 shows a section on the line II-II of Figure 1 and indicate the open-topped nature of the casing 23.
  • Figure 1 shows three metering means 26a, 26b and 26c for feeding three different components of a mixture which is to be blended in the illustrated device 10. Any suitable means for supplying an accurately controlled rate of flow of material can be used but it is preferable to use in each metering means a similar conveying means to that shown at 12 in Figure 1.
  • FIGS 3 and 4 show such an arrangement in which two main metering conveyors 26A, 26B are combined with four secondary metering conveyors 26C-26F.
  • Hoppers 27A to 27F are provided above each conveyor and contain enough material to cover the turns of the respective conveying means at all times during use of the arrangement.
  • Each conveyor 26A to 26F discharges its output into the hopper 14 of the blending device 10, the conveyors 26C-26F discharging into a downwardly converging duct 28 which opens into the hopper 14. Since the secondary metering conveyors 26C-26F are intended to feed minor proportions of the ingredients of the mixture blended in the device 10, they can be of shorter length and smaller diameter than the conveyors 26A and 26B intended to meter major components of the blend.
  • Each metering conveyor 26A-26F and the blending conveying means can be driven from a single prime mover (e.g. an electric motor).
  • a prime mover e.g. an electric motor
  • gearboxes of variable ratio can be used as can chain and sprocket drives or toothed wheel and toothed belt drives.
  • varying the pitch of the helical turns of any given metering conveyor is a very useful way of fine tuning the metering rate at which it delivers its component to the blending device and accordingly each metering conveyor can be constructed as shown in the scrap section of Figure 5.
  • any radial supports (e.g. the arms 20) of the helically disposed member and any stirring members (25a, 25b) provided must be arranged to accommodate the slight axial movement made by each turn of the helix when the plate 30 is axially adjusted.
  • a rod forming a stirring member could be fixedly secured at one end to a turn of the helix and slidably mounted at all other turns.
  • the blending conveying means could include a construction such as shown in Figure 5 but it is not necessary to provide such a pitch adjustment facility in the blending device.
  • a sliding device can be used in place of the threaded arrangement 30-32 to provide for helix pitch adjustment.
  • the arrangement shown in Figures 3 and 4 can also be used to add small volumes of liquid (e.g. a liquid surfactant) to a mixture of ingredients to be blended and an inlet region for such a liquid is indicated at 33 in Figure 3.
  • liquid surfactant e.g. a liquid surfactant
  • a 1% v/v addition of liquid surfactant has been found to provide "particle coating" of the blended mixture.
  • the blending device 10 may be specifically arranged to ensure back mixing of the particulate materials e.g. it may be inclined upwardly towards the discharge end thereof and/orfitted with contra- wound helix sections.
  • a mixture of xanthan gum powder and sodium carboxy methyl cellulose particles fed to the hopper 14 of the device 10 in the proportion of 10:1 was found to be blended by the device to an accuracy of ⁇ 1% over six random samples of the blend.
  • the metering conveyors 26C-26F were each variable pitch helices of 51 mm (2 inches) diameter of 3.2 mm (1/8 inch) diameter round section rod of 9.5 mm (3/8 inch) pitch and the conveyors 26A, 26B were of variable pitch helices of 200 mm (8 inches) diameter of 9.5 mm (3/8 inch) diameter round section rod at 63.5 mm (2-1/2 inch) pitch.
  • the elongate member 18 in the blending device 10 was of the same size, pitch and rod diameter as the conveyors 26A, 26B but was of fixed pitch.
  • the overall length of the blending device was some 2000 mm.
  • Figure 6 shows some suitable cross-sectional shapes for the member 18 of the blending device.
  • the section 40 is circular, the sections 41 and 42 elliptical, and the sections 43 to 45 part arcuate with a flat section facing away from the conveying direction 24.

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)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)

Claims (10)

1. Vorrichtung (10) zum kontinuierlichen Mischen von teilchenförmigen Materialien, mit einer Mehrzahl von Dosiermitteln (26a, 26b, 26c), die jeweils ein teilchenförmiges Material dosieren, und einem Mischmittel zum Aufnehmen und Mischen der vom jeweiligen Dosiermittel gelieferten dosierten Mengen an teilchenförmigem Material, wobei jenes Mischmittel ein Fördermittel (12) in der Form eines länglichen Elementes (18) umfaßt, das schraubenförmig um eine Rotationsachse des Fördermittels angeordnet ist, das sich in einem Gehäuse (23) befindet, das über einen unteren Teil des schraubenförmig ausgebildete, länglichen Elementes dessen Mantelform entspricht, wobei an dem Fördermittel Rührelemente (25) vorgesehen sind, die sich zwischen mindestens einigen benachbarten Windungen des schraubenförmig ausgebildeten Elementes (18) erstrecken, dadurch gekennzeichnet, daß dessen Querschnitt des länglichen Elementes (18) mindestens an dessen in die Förderrichtung des Fördermittels (12) weisenden Seite bogenförmig ist, und die Rührelemente (25b) sich außen an den jeweiligen Schraubenwindungen des länglichen Elementes befinden.
2. Vorrichtung nach Anspruch 1, bei der es sich bei den Rührelementen (25b) um Drähte handelt.
3. Vorrichtung nach Anspruch 1 oder 2, bei der der Querschnitt des länglichen Elementes (18) kreisförmig ist und die Steigung des schraubenförmig ausgebildeten, länglichen Elementes (18) über dessen Gesamtlänge konstant ist.
4. Vorrichtung nach einem der vorhergehenden Ansprüche, bei der sich weitere Rührelemente (25a) innen an den jeweiligen Schraubenwindungen befinden.
5. Vorrichtung nach einem der vorhergehenden Ansprüche, bei der mindestens einige der Rührelemente (25b, 25a) parallel zu der Achse des Fördermittels (12) angeordnet sind.
6. Vorrichtung nach Anspruch 4, bei der eine Mehrzahl von sich über die Gesamtlänge des schraubenförmig ausgebildeten, länglichen Elementes (18) erstreckenden Rührelementen (25b, 25a) vorgesehen ist, die abwechselnd innerhalb und außerhalb der Schraubenwindungen befestigt sind.
7. Vorrichtung nach einem der vorhergehenden Ansprüche, bei der jedes Dosiermittel (26a, 26b, 26c; 26A-26F) ein jeweiliges Fördermittel umfaßt, das von einem länglichen Element gebildet wird, das schraubenförmig angeordnet und zur Rotation um seine Schraubenachse in einem Gehäuse angebracht ist, das über einen unteren Teil des schraubenförmig ausgebildeten, länglichen Elementes dessen Mantelform entspricht.
8. Vorrichtung nach Anspruch 7, bei der mindestens einige der Fördermittel in den Dosiermitteln mit Mitteln (30, 31, 32) zum Verändern der Schraubensteigung des jeweiligen länglichen Elementes ausgerüstet sind.
9. Vorrichtung nach einem der vorhergehenden Ansprüche, bei der das Gehäuse (23) und das Fördermittel (12) der Mischvorrichtung nach oben zu deren Ausgabeende hin geneigt sind.
10. Vorrichtung nach Anspruch 7, bei der das Fördermittel (12) in den Dosiermitteln (26a ... 26F) und die Mischvorrichtung (10) von einer einzigen Antriebsmaschine mit korrelierten Rotationsgeschwindigkeiten angetrieben werden.
EP19870901545 1986-02-27 1987-02-20 Teilchenmaterialmischung Expired - Lifetime EP0297099B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87901545T ATE60273T1 (de) 1986-02-27 1987-02-20 Teilchenmaterialmischung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8604811 1986-02-27
GB868604811A GB8604811D0 (en) 1986-02-27 1986-02-27 Metering device

Publications (2)

Publication Number Publication Date
EP0297099A1 EP0297099A1 (de) 1989-01-04
EP0297099B1 true EP0297099B1 (de) 1991-01-23

Family

ID=10593737

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870901545 Expired - Lifetime EP0297099B1 (de) 1986-02-27 1987-02-20 Teilchenmaterialmischung

Country Status (5)

Country Link
EP (1) EP0297099B1 (de)
JP (1) JPS63502493A (de)
FI (1) FI883919A0 (de)
GB (1) GB8604811D0 (de)
WO (1) WO1987005255A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104210023A (zh) * 2014-08-27 2014-12-17 郑旭 一种高效混凝土搅拌机

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8918512D0 (en) * 1989-08-14 1989-09-20 Pharmakopius Ltd Improved mixing apparatus and method
US5320861A (en) * 1992-01-03 1994-06-14 Ocean Spray Cranberries, Inc. Fruit extraction and infusion
EP1084808B1 (de) * 1999-09-16 2003-06-04 The Japan Steel Works, Ltd. Kontinuierliche Misch- und Zuführvorrichtung
JP7007708B2 (ja) * 2017-10-10 2022-01-25 関西産業株式会社 乾燥機

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2538891A (en) * 1948-02-19 1951-01-23 Hoge Warren Zimmerman Co Continuous mixing and delivering apparatus
FR1062514A (fr) * 1951-04-25 1954-04-23 Lauterberger Blechwarenfabrik Mélangeur
FR1397988A (fr) * 1964-03-23 1965-05-07 Cie Francaise Des Prod Chim Sh Perfectionnements aux dispositifs agitateurs pour cuves mélangeuses
FR2264640A1 (en) * 1974-03-19 1975-10-17 Missioux Jean Leon Machine for mixing and applying plaster - uses feed screw with variable pitch and radial or axial mixing bars
GB1553196A (en) * 1975-08-20 1979-09-26 London Brick Buildings Ltd Mixer for and method of mixing particulate constituents
US4071226A (en) * 1976-11-16 1978-01-31 Miller Charles R Portable concrete proportioning mixer
GB2060421B (en) * 1979-10-16 1983-03-16 Hamptons Aercrete Ltd Mixing and conveying apparatus
GB2090761B (en) * 1981-01-06 1984-12-12 Power Sprays Ltd Mixing apparatus
JPS588330A (ja) * 1981-07-07 1983-01-18 Nec Corp スイツチング電源制御回路
JPS5924340U (ja) * 1982-08-09 1984-02-15 アルプス電気株式会社 活字ホイ−ル
JPS5945411A (ja) * 1982-09-07 1984-03-14 Toshiba Corp カメラの自動焦点検出表示装置
JPS6017569A (ja) * 1983-07-11 1985-01-29 Yokogawa Hokushin Electric Corp 閉領域の塗りつぶし方法および装置
DE3347417A1 (de) * 1983-12-29 1985-07-11 Georg 8550 Forchheim Badum Vorrichtung zur aufbewahrung, dosierung und mischung von moertel-materialkomponenten und verfahren zum betrieb der vorrichtung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104210023A (zh) * 2014-08-27 2014-12-17 郑旭 一种高效混凝土搅拌机
CN104210023B (zh) * 2014-08-27 2016-05-18 郑旭 一种高效混凝土搅拌机

Also Published As

Publication number Publication date
FI883919A (fi) 1988-08-24
EP0297099A1 (de) 1989-01-04
JPS63502493A (ja) 1988-09-22
FI883919A0 (fi) 1988-08-24
GB8604811D0 (en) 1986-04-03
WO1987005255A1 (en) 1987-09-11

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