EP0367948B1 - Mélangeur - Google Patents

Mélangeur Download PDF

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Publication number
EP0367948B1
EP0367948B1 EP89116941A EP89116941A EP0367948B1 EP 0367948 B1 EP0367948 B1 EP 0367948B1 EP 89116941 A EP89116941 A EP 89116941A EP 89116941 A EP89116941 A EP 89116941A EP 0367948 B1 EP0367948 B1 EP 0367948B1
Authority
EP
European Patent Office
Prior art keywords
mixing
vessel
extraction
mixing device
valve body
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
EP89116941A
Other languages
German (de)
English (en)
Other versions
EP0367948A1 (fr
Inventor
Michael Derksen
Joachim Domke
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.)
Dr Herfeld GmbH and Co KG
Original Assignee
Dr Herfeld GmbH and Co KG
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 Dr Herfeld GmbH and Co KG filed Critical Dr Herfeld GmbH and Co KG
Publication of EP0367948A1 publication Critical patent/EP0367948A1/fr
Application granted granted Critical
Publication of EP0367948B1 publication Critical patent/EP0367948B1/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
    • 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
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/35—Mixing after turning the mixing vessel upside down
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
    • B01F35/32—Driving arrangements
    • B01F35/321—Disposition of the drive
    • B01F35/3213—Disposition of the drive at the lower side of the axis, e.g. driving the stirrer from the bottom of a receptacle

Definitions

  • the invention relates to a mixing device according to the preamble of claim 1.
  • Mixing devices of the type required in the preamble of claim 1 are known, for example, from DE-C-2 110 047 and EP-A-168 564.
  • the invention is therefore based on the object of designing a mixing device according to the preamble of claim 1 in such a way that disruptive dust formation when the mixing container is opened is avoided.
  • a suction device with a valve body is thus provided on the second container part, through which a suction opening provided in a wall of the second container part can be optionally blocked or released.
  • An expedient embodiment of the invention provides for protective gas to be introduced into the mixing container in order to carry out the mixing process under explosion protection conditions.
  • the suction device according to the invention allows the oxygen atmosphere to be drawn off when the mixing container is filled with the protective gas and, after the mixing process has ended, the protective gas to be removed.
  • the mixing device shown in FIGS. 1 and 2 as the first exemplary embodiment of the invention contains a mixing container which consists of two bowl-shaped container parts 1 and 2, which with the aid of clamping devices 3 at their open ends facing one another can be firmly connected.
  • the first container part 1 provided with a floor outlet 4 can be moved with the help of a driving pallet 5.
  • the second container part 2 contains mixing tools 6 inside, which are driven by a drive motor 7.
  • the second container part 2 is held stationary on a column-like stationary holder 8, specifically by means of a swivel shaft 8a with a horizontal swivel axis 9.
  • the swivel shaft 8a is driven by a swivel drive 10 consisting of a drive motor 10a and a slip-on gear 10b.
  • the second container part 2 can be pivoted about 180 ° about the horizontal pivot axis 9 by the pivot drive 10, namely between an initial position (FIG. 1) in which the second container part 2 forms the lid of the mixing container and a mixing position in which the second container part 2 forms the bottom of the mixing container.
  • a suction device 11 is fastened to the second container part 2, specifically to its bottom wall 2a located in the starting position. It contains a tubular, preferably cylindrical suction housing 12, which in the region of its - in the drawing - upper end 12a has a connecting piece 13 which can be connected to a suction line 15 by a pipe coupling 14 (preferably in the manner of a quick coupling).
  • This suction line 15 is part of a suction system with (not shown) filter and suction fan.
  • the end of the suction line 15 that can be connected to the connecting piece 13 may also be flexible in order to enable a quick coupling connection to the connecting piece 13.
  • the suction housing 12 is fastened to the bottom wall 2a, for example welded on. It projects with its lower end through an outer bottom wall part 2a 'and is connected to an inner bottom wall part 2ateil at a point at which a circular suction opening 16 is provided in the inner bottom wall part 2a' of the second container part 2.
  • the suction opening 16 is surrounded by an annular sealing seat 17 which widens in the direction of the suction device 11.
  • the suction device 11 contains a valve body 18 which is essentially in the form of a circular disk.
  • This valve body 18 fits exactly into the sealing seat 17 of the suction opening 16.
  • the valve body 18 has a sealing section 18a which tapers against the sealing seat 17.
  • a groove 19 is provided on the circumference of this sealing section 18a, into which a sealing ring 20 is inserted.
  • the valve body 18 can be moved axially back and forth between the closed position shown in FIG. 2 in solid lines and the open position 18 ′ shown in broken lines in the suction housing 12 (corresponding to the double arrow 21).
  • the valve body 18 closes the suction opening 16 flush with the inner wall of the inner bottom wall part 2a ⁇ .
  • the valve body 18 In the starting position of the mixing container, on the other hand, the valve body 18 can be brought into its open position 18 'and the suction opening 16 can thereby be opened.
  • the tubular suction housing 12 has a clear cross section which is larger than the cross section of the suction opening 16 and the diameter of the valve body 18.
  • the suction ring gap 22 between the circumference of the valve body 18 and the inner wall of the suction housing 12.
  • a pressure-medium-actuated cylinder-piston unit in the form of a compressed air cylinder 24 is provided in the illustrated embodiment, which is axially flanged to the upper end 12a of the suction housing 12 facing away from the suction opening 16 (flange connection 25).
  • the piston rod 24a of the compressed air cylinder 24 is fixedly connected to the end 26a of an actuating rod 26, the other end 26b of which supports the valve body 18.
  • the establishment and release of the coupling connection between the suction line 15 and the connecting piece 13 can be reported by limit switches of a control device belonging to the mixing device, so that the actuation of the valve body 18 by the compressed air cylinder 24 is controlled as a function of the actuation of these limit switches.
  • FIG 3 shows a further embodiment of the mixing device according to the invention, which makes it possible to carry out the mixing process under a protective gas atmosphere (for example under a nitrogen atmosphere) in order to meet explosion protection conditions in this way.
  • a protective gas atmosphere for example under a nitrogen atmosphere
  • FIG. 3 only illustrates the area which is delimited in FIG. 1 with dashed lines and identified by the reference symbol x.
  • FIG 3 shows the swivel shaft 8a, via which the slip-on gear 10b of the swivel drive 10 with the second container part 2 is rotatably connected.
  • This pivot shaft 8a is rotatably supported by bearings 27 in the fixed bracket 8.
  • the slip-on gear 10b is fixed on the bracket 8 by means of screws 28.
  • the pivot shaft 8a is designed as a hollow shaft.
  • a pipe 29 is arranged, which serves for the supply of protective gas and rotates with the pivot shaft 8a.
  • the outer end of the pipeline 29 is connected via a sealing head 30 to a stationary and rotationally fixed (not illustrated) protective gas supply line, a sealed rotary connection 31 being present between the sealing head 30 and the pipeline 29.
  • a valve 32 is arranged, the details of which are not illustrated in FIG.
  • This valve 32 opens under pressure (i.e. when protective gas under pressure is supplied via the pipeline 29). In the depressurized state, the valve closes and is preferably flush with the inner wall of the second container part 2.
  • a measuring point can be provided to which a residual oxygen measuring system is connected.
  • the first container part 1 filled with the product becomes moved under the second container part 2 and coupled with this via the pneumatic clamping devices 3. If the coupling connection is established (which is reported by the limit switch) and the lifting cylinders (which have raised the first container part 1 for establishing the coupling connection) are again in their lower position, protective gas (for example Nitrogen) supplied to the pipeline 29 and introduced into the mixing container via the valve 32.
  • protective gas for example Nitrogen
  • the feed pressure can be, for example, 1 to 2 bar.
  • the valve body 18 of the suction device 11 opens, so that the mixed atmosphere (oxygen / protective gas) which is formed in the mixing container is sucked off via the suction line 15.
  • the mixing container is suctioned off via the suction device 11 in the manner already explained.
  • the mixing container can then be opened.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Accessories For Mixers (AREA)
  • Glanulating (AREA)

Claims (8)

1. Dispositif mélangeur de matière pulvérulente et granulaire, comprenant:
a) une cuve mélangeuse formée de deux parties en forme de cuvettes (1, 2) pouvant être assemblées l'une à l'autre et dont la première (1), équipée d'une décharge par le fond (4), est transportable et dont la seconde (2), qui est équipée d'outils mélangeurs (6) pouvant être entraînés en rotation, est montée en position fixe,
b) un support fixe (8) sur lequel la seconde partie (2) de la cuve est montée de manière qu'elle puisse basculer d'environ 180° autour d'un axe horizontal de pivotement (9) entre une position initiale dans laquelle la seconde partie (2) de la cuve forme le couvercle de cette dernière et une position de mélange dans laquelle cette seconde partie forme le fond de la cuve mélangeuse,
caractérisé par la particularité suivante:
c) un dispositif d'aspiration (11) prévu sur la seconde partie (2) de la cuve est équipé d'un corps de vanne (18) qui peut sélectivement fermer ou ouvrir un orifice d'aspiration (16) existant dans une cloison (2a, 2a˝) de la seconde partie (2) de la cuve.
2. Dispositif mélangeur selon la revendication 1, caractérisé en ce que le dispositif d'aspiration (11) comporte une enveloppe tubulaire d'aspiration (12) qui comprend une tubulure d'assemblage (13) pouvant être reliée à un conduit d'aspiration (15) et dans laquelle est disposée une tige de manoeuvre (26) qui est mobile alternativement dans la direction de l'axe longitudinal (12c) de l'enveloppe, qui supporte à l'extrémité libre (26b) le corps de vanne (18) et dont l'autre extrémité (26a) est reliée à une commande d'actionnement (24).
3. Dispositif mélangeur selon la revendication 2, caractérisé en ce que l'enveloppe tubulaire d'aspiration (12) a une section interne qui est supérieure à la section de l'orifice d'aspiration (16), le corps discoïdal de vanne (18) mobile de manière à pouvoir se loger à ajustement et de façon étanche dans cet orifice d'aspiration étant réalisé de manière à avoir une dimension telle que, lorsqu'il est en position d'ouverture, il existe un interstice annulaire d'aspiration (22) entre sa circonférence et la paroi interne de l'enveloppe d'aspiration.
4. Dispositif mélangeur selon la revendication 3, caractérisé en ce qu'un siège d'étanchéïté circulaire (17) s'élargissant en cône est prévu dans l'orifice d'aspiration (16), le corps de vanne (18) comportant une partie d'étanchéïté (18a) dont le profil est complémentaire de celui du siège d'étanchéïté (17) et dans laquelle un joint d'étanchéïté (20) est placé.
5. Dispositif mélangeur selon la revendication 2, caractérisé en ce que la commande d'actionnement est formée d'un groupe à cylindre et piston (24) actionné par un fluide sous pression.
6. Dispositif mélangeur selon la revendication 1, caractérisé par un dispositif d'introduction de gaz protecteur dans la cuve mélangeuse.
7. Dispositif mélangeur selon la revendication 6, dans lequel un moto-réducteur (10a, 10b) peut faire pivoter la seconde partie (2) de la cuve au moyen d'un arbre de basculement (8a) autour de l'axe horizontal (9) de pivotement entre la position initiale et la position de mélange, caractérisé en ce qu'un conduit (29) tournant avec l'arbre de basculement (8a) et disposé à l'intérieur de ce dernier, qui est creux, est destiné à l'arrivée du gaz protecteur et un conduit d'arrivée de gaz protecteur qui est monté en position fixe et immobile en rotation est raccordé à ce conduit rotatif (29) au moyen d'une tête d'étanchéïté (20) équipée d'une liaison à rotation (31).
8. Dispositif mélangeur selon la revendication 7, caractérisé en ce qu'une soupape (32) s'ouvrant sous pression et qui est à fleur de la paroi interne de la seconde partie (2) de la cuve en l'absence de pression est disposée à l'embouchure du conduit (29) dans le volume interne de la seconde partie (2) de la cuve.
EP89116941A 1988-11-07 1989-09-13 Mélangeur Expired - Lifetime EP0367948B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3837763A DE3837763A1 (de) 1988-11-07 1988-11-07 Mischvorrichtung
DE3837763 1988-11-07

Publications (2)

Publication Number Publication Date
EP0367948A1 EP0367948A1 (fr) 1990-05-16
EP0367948B1 true EP0367948B1 (fr) 1992-03-04

Family

ID=6366663

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89116941A Expired - Lifetime EP0367948B1 (fr) 1988-11-07 1989-09-13 Mélangeur

Country Status (3)

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EP (1) EP0367948B1 (fr)
DE (2) DE3837763A1 (fr)
ES (1) ES2030250T3 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4204086C2 (de) * 1992-02-12 1995-07-13 Ruberg Mischtechnik Kg Mischer
DE4419598C2 (de) * 1994-06-03 1998-10-29 Ruberg Mischtechnik Kg Mischer
DE102013111158B3 (de) * 2013-10-09 2014-11-13 Dr. Herfeld Gmbh & Co. Kg Verfahren zum Mischen eines Mischgutes innerhalb eines geschlossenen Mischraumes sowie industrieller Mischer
CN108905766A (zh) * 2018-08-23 2018-11-30 烟台市鸿风机有限公司 一种防止粉尘泄露的混料机
DE102019123666B3 (de) 2019-09-04 2020-07-30 Dr. Herfeld Gmbh & Co. Kg Mischmaschine
DE202019104874U1 (de) 2019-09-04 2019-09-18 Dr. Herfeld Gmbh & Co. Kg Mischmaschine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7401746U (fr) * 1974-05-16 Willmes J
DE2110047C2 (de) * 1971-03-03 1983-01-20 Herfeld, Dipl.-Volksw. Dr., Friedrich Walter Adolf, 5982 Neuenrade Mischvorrichtung
DE3206385C2 (de) * 1982-02-22 1986-03-27 Wolfram Dipl.-Ing. 6074 Rödermark Reimelt Pneumatischer Mischer für fließfähiges Schüttgut
DE3426159A1 (de) * 1984-07-16 1986-01-23 Herfeld, Friedrich Walter, Dr., 5982 Neuenrade Mischvorrichtung
DE3543913A1 (de) * 1985-12-12 1987-06-19 Herfeld Friedrich W Mischvorrichtung

Also Published As

Publication number Publication date
ES2030250T3 (es) 1992-10-16
DE3837763A1 (de) 1990-05-17
EP0367948A1 (fr) 1990-05-16
DE58900923D1 (de) 1992-04-09

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