EP0668794B1 - Dispositif permettant de recouvrir des particules solides - Google Patents

Dispositif permettant de recouvrir des particules solides Download PDF

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Publication number
EP0668794B1
EP0668794B1 EP94924850A EP94924850A EP0668794B1 EP 0668794 B1 EP0668794 B1 EP 0668794B1 EP 94924850 A EP94924850 A EP 94924850A EP 94924850 A EP94924850 A EP 94924850A EP 0668794 B1 EP0668794 B1 EP 0668794B1
Authority
EP
European Patent Office
Prior art keywords
disc
housing
locking pin
parts
disc parts
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
EP94924850A
Other languages
German (de)
English (en)
Other versions
EP0668794A1 (fr
Inventor
Axel König
Mathias Kleinhans
Janéz MIHELIC
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.)
Santrade Ltd
Original Assignee
Santrade 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 Santrade Ltd filed Critical Santrade Ltd
Publication of EP0668794A1 publication Critical patent/EP0668794A1/fr
Application granted granted Critical
Publication of EP0668794B1 publication Critical patent/EP0668794B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/70—Spray-mixers, e.g. for mixing intersecting sheets of material
    • B01F25/74—Spray-mixers, e.g. for mixing intersecting sheets of material with rotating parts, e.g. discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/70—Spray-mixers, e.g. for mixing intersecting sheets of material
    • B01F25/74—Spray-mixers, e.g. for mixing intersecting sheets of material with rotating parts, e.g. discs
    • B01F25/743—Spray-mixers, e.g. for mixing intersecting sheets of material with rotating parts, e.g. discs the material being fed on both sides of a part rotating about a vertical axis

Definitions

  • the invention relates to a device for coating solid-state particles with a layer obtained and solidifying from a liquid phase, in which a rotating turbine in a housing, constructed from two disk parts is provided, on a surface of a disk part with the solid particles and in an underlying cavity is supplied with the liquid forming the liquid phase, the liquid for coating the solid particles passing through an annular gap between the disk parts into an annular space leading to the outwardly thrown solid particles in the housing.
  • Such a device is known from EP 0 048 312 A1.
  • the two disk parts forming the turbine lie axially against one another with blade webs, which protrude downward into the cavity from the upper disk part and form flow channels between them for the liquid, which is generally formed from a melt, which then reaches the annular gap. If the amount of melt discharged which forms the liquid is to be varied, for example by different droplet sizes in the coating veil, then it becomes necessary to remove the turbine and replace it with a turbine provided with a different annular gap, or to provide spacers which change the distance between the disk parts. In both cases it is necessary to remove the turbine from the housing.
  • the invention has for its object to provide a device of the type mentioned in such a way that a change in the annular gap height is possible without removing the turbine.
  • a device of the type mentioned at the outset to arrange the two disk parts so as to be axially adjustable relative to one another from outside to adjust the size of the annular gap.
  • this can be done in a particularly simple and advantageous manner in that the axial adjustment takes place through a central thread connecting the two disk parts, in particular a fine thread, and in that means that can be actuated from outside the housing to rotate the disk parts against one another and Means for fixing the mutual position of the disk parts are provided.
  • a mutual rotation of the two disk parts which can be brought about from the outside, is sufficient in order to be able to carry out the change in the annular gap, which is generally only slight.
  • the means for rotation are formed from an adjusting pin which engages radially into a first disk part through a housing slot which extends over part of the circumference, and the second disk part is advantageously provided with an anti-rotation device for this purpose.
  • the turbine therefore only needs to be stopped, after which - after removal of a locking device - the two disk parts are rotated relative to one another by a certain angle, so that they can be adjusted axially against one another in the desired manner by the fine thread.
  • the anti-rotation device consists of a locking pin which is guided through a housing cover and is supported on the surface of the second disk part.
  • the means for fixing the relative position of the two disc parts can be formed from a locking pin which engages radially in both disc parts.
  • the locking pin can be screwed into a thread provided radially in the second disk part, and the adjusting pin can be axially and non-rotatably connected to the locking pin.
  • the locking pin can initially be moved out of its locking position via the adjusting pin introduced from the outside for the adjustment process. The desired adjustment can then be made when the anti-rotation device is attached to the second disk part. The locking pin is then screwed in again and the turbine can take over production again without the need for expansion or laborious conversion work.
  • the two disk parts can be axially displaced relative to one another, but a feed connection for the melt protrudes expediently into the cavity in the turbine, which causes a uniform distribution of the liquid and which is firmly connected to a feed pipe coming from the outside, it is in a further development of the invention, it is advantageous if this feed connector is arranged axially displaceably in a central collar of the second disk part. Finally, a labyrinth seal can be provided between the collar and the supply nozzle, so that even with the given adjustment possibility for the annular gap, the supply for the melt forming the liquid can take place in a proven manner.
  • FIG. 1 shows a device for coating solid particles, which essentially consists of a tubular housing (1) which, in the exemplary embodiment, is composed of four housing rings (1a, 1b, 1c and 1d).
  • a drive shaft (4) designed as a hollow shaft for a turbine (5) is mounted, which in a manner not shown via a drive in Rotation is set.
  • a further pipe (6) is laid at a distance from the inner diameter of the hollow shaft (4), which is attached to the turbine and serves to supply the trubin body with a heating medium which can pass through the channels arranged in the turbine body in the circuit .
  • the turbine (5) is constructed from two disc parts (5a and 5b), the disc part (5b) being connected to the hollow shaft (4) and the tube (6) and also having the heating channels (7).
  • the disc part (5b) is provided with a threaded connector (8) which has a fine thread.
  • a second disk part (5a) is screwed on its surface with the Radially extending blades (10) shown in section and provided with a cavity (11) in its interior, can be guided via a fit relative to the first disc part and connected via a feed nozzle (12) to a feed tube (13), the in Fig.
  • the feed connector (12) is guided in an axially displaceable manner in a collar (32) which is provided in the middle of the disk part (5a) and projects upwards.
  • a labyrinth seal is provided between the feed connector (12) and the collar (32).
  • the tube (13) is surrounded by a heating jacket (14) through which a heating medium can be supplied in the direction of the arrow (15) and can be discharged again through a second tube (16).
  • a cylindrical tube (17) with a funnel (18) is inserted centrally in the cover (3), which is formed in two parts, through which the solid particles to be coated are supplied to the surface of the disk part (5a) in a manner not shown.
  • the mass required for coating is fed in the form of a melt in the heated state in the direction of the arrow (20) through the pipe (13) into the space (11) and from there via radially running bores into an annular gap (21) and from there together with the solid particles thrown radially outwards from the blades (10) into an annular space (22), in which the melt which forms a kind of veil after emerging from the annular gap (21) coats the solid particles.
  • This coating layer is then cooled and solidified.
  • the slot (26) opens out into a larger recess (27), which serves for better accessibility.
  • the cover (3) is provided with a bore (28) which is directed obliquely from above onto the disc part (5a) in such a way that a locking pin (29) is inserted from above can be inserted at the bottom into the space between the radially extending blades (10).
  • This locking pin (29) blocks rotation of the disk part (5a). If the adjusting pin (25) is pivoted counterclockwise from its position shown in FIG. 3 within its slot (26), the disk part (5b) rotates relative to the fixed disk part (5a). The disc part (5a) is therefore adjusted in its axial position relative to the disc part (5b) by the thread of the connecting piece (8) which engages in it, which is a fine thread.
  • the adjustment pin is of course in a position in which it does not engage in the disk part (5a). This means that the height of the annular gap (21) also changes. If the desired height of the annular gap is set, the adjusting pin (25) is pulled out of its bore (24) and replaced by a further locking pin (30), which is shown in FIGS. 1 and 2.
  • This locking pin has a threaded head and can be screwed into a corresponding thread in the bore (24). During this screwing operation, its end engages in blind hole bores (40) with an insertion cone which are radially arranged on the outer circumference of the disk part (5a) and which are evenly distributed over the circumference of the disk part (5a) at certain angular intervals. This results in securing the two disc parts (5a and 5b) to one another.
  • annular gap (21) is to be adjusted after a certain operating phase, then the locking pin (30) is turned off its openings of the disc part (5a) and after the insertion of the adjustment pin (25), a new adjustment process can be carried out without the need to remove the turbine (5).
  • the locking pin (30) has, for example, a hexagon socket on its end provided with the threaded head (31) for inserting the adjusting pin (25). Adjusting pin and locking pin form a common adjusting pin when the locking pin (30) is removed from its locking position by actuation by the adjusting pin. In this embodiment, it is not necessary to remove the locking pin (31) completely from the disk body (5b) each time. However, this configuration presupposes that the axial path, which is necessary for removing the locking pin (30) from the bores of the disk part (5a), is available for the head (31) of the locking pin (30) within the disk part (5b).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Glanulating (AREA)
  • Glass Compositions (AREA)
  • Nozzles (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)
  • Manufacturing Of Micro-Capsules (AREA)
  • Paints Or Removers (AREA)

Claims (10)

  1. Dispositif permettant de recouvrir des particules solides à l'aide d'une couche tirée d'une phase liquide et se durcissant, dans lequel est prévue une turbine (5) tournant dans un bâti, constituée de deux parties en forme de disque (5a, 5b), qui est approvisionnée en particules solides sur une surface d'une partie en forme de disque (5a) et en matière fondue formant la phase liquide dans une cavité (11) se trouvant au-dessous, la matière liquide destinée à recouvrir les particules solides parvenant dans le bâti à un espace annulaire (22) portant les particules solides projetées par la force centrifuge vers l'extérieur à travers une fente annulaire (21) entre les parties en forme de disque (5a, 5b), caractérisé en ce que les deux parties en forme de disque (5a, 5b) sont configurées axialement mobiles l'une par rapport à l'autre depuis l'extérieur pour le réglage de la hauteur de la fente annulaire (21).
  2. Dispositif selon la revendication 1, caractérisé en ce que le déplacement axial est obtenu grâce à un filetage central (8), notamment un filetage à pas fin, liant les deux parties en forme de disque (5a, 5b) et en ce qu'il est prévu des moyens (25) susceptibles d'être manoeuvrés depuis l'extérieur du bâti (1, 1a) permettant la rotation mutuelle des parties en forme de disque et des moyens (30) permettant la fixation de la position mutuelle des parties en forme de disque.
  3. Dispositif selon la revendication 2, caractérisé en ce que les moyens (25) permettant la rotation sont formés d'une broche de déplacement s'enclenchant radialement dans une première partie en forme de disque (5b) par une fente de bâti (26) s'étendant sur une partie de la périphérie.
  4. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la deuxième partie en forme de disque (5a) est munie d'un dispositif de protection contre la rotation (29)
  5. Dispositif selon la revendication 4, caractérisé en ce que le dispositif de protection contre la rotation est formé d'une broche d'arrêt (29) dirigée à travers un couvercle de bâti (3), s'appuyant à la surface de la deuxième partie en forme de disque (5a).
  6. Dispositif selon la revendication 2, caractérisé en ce que les moyens permettant la fixation de la position relative des deux parties en forme de disque (5a, 5b) sont constitués d'une broche d'arrêt (24) s'enclenchant radialement dans les deux parties en forme de disque.
  7. Dispositif selon la revendication 6, caractérisé en ce que la broche d'arrêt (24) est susceptible d'être vissée sur un filetage prévu dans la première partie en forme de disque (5b).
  8. Dispositif selon la revendication 7, caractérisé en ce que la broche de déplacement (25) est susceptible d'être connectée de manière axiale et libre en rotation à la broche d'arrêt (30).
  9. Dispositif selon la revendication 7, caractérisé en ce qu'un embout d'approvisionnement (12) relié à un tuyau d'approvisionnement (13) de la matière fondue fixe est disposé de manière axialement mobile dans une collerette centrale (32) de la deuxième partie en forme de disque (5a).
  10. Dispositif selon la revendication 9, caractérisé en ce qu'entre la collerette (32) et l'embout d'approvisionnement (12) est prévue une garniture à labyrinthe.
EP94924850A 1993-09-10 1994-08-05 Dispositif permettant de recouvrir des particules solides Expired - Lifetime EP0668794B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4330632 1993-09-10
DE4330632A DE4330632C1 (de) 1993-09-10 1993-09-10 Vorrichtung zum Überziehen von Festkörperpartikeln
PCT/EP1994/002608 WO1995007135A1 (fr) 1993-09-10 1994-08-05 Dispositif permettant de recouvrir des particules solides

Publications (2)

Publication Number Publication Date
EP0668794A1 EP0668794A1 (fr) 1995-08-30
EP0668794B1 true EP0668794B1 (fr) 1996-11-06

Family

ID=6497308

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94924850A Expired - Lifetime EP0668794B1 (fr) 1993-09-10 1994-08-05 Dispositif permettant de recouvrir des particules solides

Country Status (11)

Country Link
US (1) US5593500A (fr)
EP (1) EP0668794B1 (fr)
JP (1) JPH08501729A (fr)
KR (1) KR950704031A (fr)
CN (1) CN1114496A (fr)
AT (1) ATE144914T1 (fr)
AU (1) AU665914B2 (fr)
CA (1) CA2147131A1 (fr)
DE (2) DE4330632C1 (fr)
GR (1) GR3021597T3 (fr)
WO (1) WO1995007135A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102712009A (zh) * 2010-01-08 2012-10-03 福伊特专利有限公司 Df涂布机用头

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3269660A (en) * 1965-10-12 1966-08-30 Stratford Eng Corp Mixing atomizing rotor
EP0048312A1 (fr) * 1980-09-19 1982-03-31 Nemo Ivarson Procédé et dispositif de mélange continu d'un liquide avec une poudre
SE455672B (sv) * 1985-02-04 1988-08-01 Lejus Medical Ab Forfarande for overdragning av fasta patiklar med en smelta
US5132142A (en) * 1991-03-19 1992-07-21 Glatt Gmbh Apparatus and method for producing pellets by layering power onto particles
DE59201645D1 (de) * 1991-07-11 1995-04-20 Glatt Gmbh Verfahren und Einrichtung zum Beschichten von Teilchen.
DE4330633C1 (de) * 1993-09-10 1995-04-13 Santrade Ltd Vorrichtung zum Überziehen kleiner Festkörper

Also Published As

Publication number Publication date
KR950704031A (ko) 1995-11-17
CN1114496A (zh) 1996-01-03
ATE144914T1 (de) 1996-11-15
EP0668794A1 (fr) 1995-08-30
WO1995007135A1 (fr) 1995-03-16
GR3021597T3 (en) 1997-02-28
CA2147131A1 (fr) 1995-03-16
DE59401000D1 (de) 1996-12-12
AU665914B2 (en) 1996-01-18
AU7498194A (en) 1995-03-27
US5593500A (en) 1997-01-14
JPH08501729A (ja) 1996-02-27
DE4330632C1 (de) 1995-02-09

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