WO1992004110A1 - Mecanisme agitateur avec dispositif permettant le remplacement rapide de la garniture d'etancheite - Google Patents

Mecanisme agitateur avec dispositif permettant le remplacement rapide de la garniture d'etancheite Download PDF

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Publication number
WO1992004110A1
WO1992004110A1 PCT/EP1991/001525 EP9101525W WO9204110A1 WO 1992004110 A1 WO1992004110 A1 WO 1992004110A1 EP 9101525 W EP9101525 W EP 9101525W WO 9204110 A1 WO9204110 A1 WO 9204110A1
Authority
WO
WIPO (PCT)
Prior art keywords
sealing
shaft
container
housing
agitator
Prior art date
Application number
PCT/EP1991/001525
Other languages
German (de)
English (en)
Inventor
Heinz-Jürgen BACHELIER
Original Assignee
Eberhard Hoesch & Söhne Gmbh Verfahrens- Und Anlagentechnik
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 Eberhard Hoesch & Söhne Gmbh Verfahrens- Und Anlagentechnik filed Critical Eberhard Hoesch & Söhne Gmbh Verfahrens- Und Anlagentechnik
Priority to EP91914507A priority Critical patent/EP0500833B1/fr
Priority to DE59102079T priority patent/DE59102079D1/de
Publication of WO1992004110A1 publication Critical patent/WO1992004110A1/fr

Links

Classifications

    • 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
    • B01F35/40—Mounting or supporting mixing devices or receptacles; Clamping or holding arrangements therefor
    • B01F35/41—Mounting or supporting stirrer shafts or stirrer units on receptacles
    • B01F35/411—Mounting or supporting stirrer shafts or stirrer units on receptacles by supporting only one extremity of the shaft
    • B01F35/4111—Mounting or supporting stirrer shafts or stirrer units on receptacles by supporting only one extremity of the shaft at the top of the receptacle
    • 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
    • B01F35/10—Maintenance of mixers

Definitions

  • the invention relates to an agitator for a container with at least one axially liftable and lowerable agitator shaft and with a drive attached to the container by means of a support housing with at least one drive shaft, the drive shaft and the agitator shaft being releasably connected to one another via an intermediate part outside the container are and the intermediate part has a sealing arrangement for the passage of the agitator shaft through the container wall.
  • a stroke drive for moving the upper part of the stirrer shaft in the axial direction is just as indispensable as a push-off device for ejecting the lower part of the stirrer shaft from the coupling.
  • a stroke drive for moving the upper part of the stirrer shaft in the axial direction is just as indispensable as a push-off device for ejecting the lower part of the stirrer shaft from the coupling.
  • the sealing arrangement is arranged at an axial distance from the passage of the agitator shaft, that the sealing arrangement is supported on a sealing housing which covers the connection between the intermediate part and the agitator shaft and can be tightly connected to the sealing arrangement and the container wall and that the sealing housing and the sealing arrangement are telescopically displaceable in the axial direction.
  • the intermediate part carrying the sealing arrangement is connected outside the container by means of detachable couplings, preferably disc couplings, to the drive shaft and to the agitator shaft.
  • the two coupling halves and in particular the structural elements connecting them to one another are easily accessible from the outside.
  • a free space is created between the container wall and the coupling, which considerably simplifies the maintenance and / or repair work occurring in this area.
  • neither the normal agitators according to the invention nor the coaxial agitators according to the invention require the assembly and / or disassembly of the sealing arrangement to be raised or removed from the agitator drive beforehand. Rather, the free space available above the container wall allows the sealing arrangement and the intermediate part connected to it to form a structural unit in their installed position. catch and in this position to connect the intermediate part with drive shaft and agitator shaft or to release the corresponding couplings.
  • the intermediate part can be aligned between the ends of the drive and agitator shaft without the use of complex auxiliary devices, or laterally out of the support parallel to its axis ⁇ Slide out the housing.
  • the replacement of the "sealing module" consisting of the intermediate part and the sealing arrangement takes only little time.
  • the maintenance-related standstill of the agitator can be reduced to a minimum. This applies in particular if the construction effort is kept extremely low by constructive measures, such as the use of fitting screws for connecting coupling halves.
  • a sealing housing is provided. This covers the connection between the intermediate part and the agitator shaft and the sealing arrangement is supported on it.
  • the sealing housing of the sealing arrangement offers a rotationally fixed abutment.
  • it forms the lateral closure of the container wall and sealing arrangement of limited space above the passage of the agitator shaft. Since the medium to be processed can enter the space unhindered through the gap between the agitator shaft and the container wall in the container, it is advantageous that the sealing housing can be tightly connected to both the sealing arrangement and the container wall.
  • a hermetic seal of the interior of the container from the environment is essential, especially when processing hot, aggressive and / or toxic substances.
  • the sealing housing and the sealing arrangement 5 are telescopically displaceable in the axial direction.
  • the sealing housing is raised, the entire coupling area of the intermediate part and the agitator shaft is exposed, and in particular the connecting elements of the two coupling halves are easily accessible.
  • a sufficiently large assembly space is also available within the support housing 0 of the agitator drive if, as in the case of coaxial agitators, outer coupling shells have to be removed first before the coupling of the centrally located intermediate part and the centrally arranged agitator shaft is accessible .
  • the telescopic displaceability of the sealing housing allows the sealing arrangement to be underpinned by means of mounting rails, as may be necessary when installing and removing the sealing arrangement.
  • a "sealing module” change it makes sense to raise the sealing housing to the height of the sealing arrangement and to remove it together with the "sealing module” from the supporting housing or to insert it into the supporting housing via mounting rails.
  • the individual housing parts which, however, have to be tightly connected to one another, can be handled independently of the sealing arrangement. They must be removed from the support housing separately from the other parts of the agitator to be assembled or disassembled and placed outside the agitator during the work in question.
  • the telescopic displaceability of the sealing arrangement relative to the sealing housing is particularly advantageous in those cases in which aggressive and / or toxic substances are processed. In these cases, it must be avoided that the fitter comes into contact with the container contents during the seal change. For this purpose, it may be necessary to first lower the agitator shaft before removing the sealing housing, in order to close the gap between the agitator shaft and the container wall.
  • the sealing housing can be connected to a mounting flange of the container and to a supporting flange of the sealing arrangement by means of releasable connecting elements.
  • the detachability of the connection between the sealing housing and the container and between the sealing housing and the sealing arrangement is an indispensable prerequisite for the sealing arrangement being able to be replaced as part of a quick change.
  • means for centering the sealing housing are provided in its installed position. They serve as an assembly aid and allow an exact installation of the sealing housing with minimal expenditure of time. Because only with precise positioning of the sealing housing is an accurate one Alignment of the sealing arrangement connected to the sealing housing and closely encompassing the intermediate part of the agitator shaft is ensured. A precise alignment of the sealing arrangement and, associated therewith, an arrangement of the intermediate part that is exactly aligned in the axial direction with the drive shaft and the agitator shaft is, however, a prerequisite for vibration-free running of the agitator shaft which is mounted on the drive side on the fly.
  • the sealing housing and the sealing arrangement can be displaced relative to one another on approximately axially aligned sliding surfaces and that seals are provided on the sliding surfaces and on the contact surfaces of the sealing housing with the mounting flange.
  • the presence of axially aligned sliding surfaces makes it easier to move the sealing arrangement and sealing housing relative to one another when the seal is changed.
  • the seals provided both on the sliding surfaces and on the contact surfaces of the sealing housing with the mounting flange ensure that the interior of the container remains hermetically sealed from the surroundings even during such relative movements. This is of great importance especially when processing aggressive and / or toxic media.
  • the agitator shaft in the area of the sealing housing is provided with a radially oriented, circumferential collar, which on its side facing the passage has a seal encompassing it.
  • the radially oriented, circumferential collar acts as a catching device on which the agitator shaft can be suspended with the sealing arrangement attached to it during assembly or disassembly of the intermediate part.
  • the circumferential collar can consist, for example, of a ring shrunk onto the shaft for this purpose; it is also possible, as a catching device, to connect the part of the coupling to use stirrer shaft and intermediate part.
  • the seal arranged on the side of the collar facing the passage and encompassing the passage ensures that the interior of the container is sealed against the environment when the agitator shaft is suspended.
  • Suitable sealing elements are, for example, O-rings which develop their sealing effect under the influence of the inherent weight of the stirring shaft and the stirring elements attached to it. In this way, a further contribution to reducing the maintenance-related downtimes of the agitator can be made.
  • the medium to be processed can remain in the agitator container during the change of the sealing arrangement. It is not necessary to empty the entire system or at least the container of the agitator in question before starting the maintenance work. The system can start operating again correspondingly quickly after completion of the maintenance work.
  • the sealing housing has flushing connections. Through the gap between the agitator shaft and the container wall, the medium to be processed enters the space above the container delimited by the sealing arrangement. If these are aggressive and / or toxic substances, this space must first be flushed out after the agitator has been shut down for maintenance and before the sealing arrangement has been removed.
  • rinsing connections are used, through which steam or rinsing liquids, for example, can initially be introduced and through which rinsing agent loaded with the medium to be processed is to be removed.
  • means are provided for locking the sealing housing pushed over the sealing arrangement.
  • Fig. 1 shows a longitudinal section through a normal agitator in the region of its intermediate part
  • FIG. 2 shows a longitudinal section through a coaxial agitator with two coaxial, counter-rotating agitator shafts in the region of its intermediate part.
  • FIG. 1 shows an intermediate part 1 arranged within a support housing 21 of an agitator drive. This is connected via an upper disk clutch 2 to a drive shaft 3 and via a lower disk clutch 4 to an agitator shaft 5. Both the upper disk clutch 2 and the lower disk clutch 4 are two-part machine elements of conventional design. For reasons of ease of maintenance and repair, a drive-side coupling half 6 of the intermediate part 1 is detachably connected to the latter. The torsional strength of the connection of the coupling half 6 on the drive side and the intermediate part 1 is achieved with the aid of a feather key 7. The coupling halves are connected to one another by means of connecting screws 8.
  • intermediate part 1 carries a sealing arrangement 11.
  • sealing liquid is conducted in a closed circuit, in which, among other things, a thermosiphon container (not shown) is switched on. Starting from an inlet channel 12, it is fed via a blocking channel 13 to an outlet channel 14 of the mechanical seal 11.
  • the mechanical seal 11 On the drive side, the mechanical seal 11 is provided with a mounting bracket 15 which can be locked in place on a protective sleeve 16 which is firmly connected to the intermediate part 1.
  • the mechanical seal 11 On its container side, the mechanical seal 11 carries a support flange 17 over its entire circumference, with which it is supported on a sealing housing 18.
  • the sealing housing 18 is screwed on the container side to a part of the container wall 10 designed as a mounting flange 19.
  • seals 20 are provided on the contact surfaces of the sealing housing 18 and the support flange 17 or mounting flange 19.
  • Flushing connections 26 are distributed over the jacket of the sealing housing 18. These serve to flush the space above the passage 9 delimited by the sealing housing 18 after the agitator has been shut down for maintenance. At least two rinsing connections 26 are to be provided, one serving to supply detergent such as steam or rinsing liquids, while the other is used to discharge detergent loaded with the medium to be processed from the space under the sealing housing 18.
  • the lines connecting it to the thermosiphon container (not shown) at the inlet channel 12 and at the outlet channel 14 ' must first be disconnected. Subsequently, the mechanical seal 11 is fixed on the intermediate part 1 by inserting and locking the mounting bracket 15 in a groove provided in the protective sleeve 16. After loosening the screw connections on the support flange 17 and on the mounting flange 19 of the container wall 10, the sealing housing 18 can be raised and pushed telescopically over the mechanical seal 11. Corresponding locking means (not shown in FIG. 1) arranged in the upper region of the support housing 21 allow the sealing housing 18 to be fixed above the upper disk clutch 2.
  • this “sealing module” settles on the mounting rails and can be slid freely on the side of the support housing 21. With the aid of a hoist it can then be removed from there and placed on a means of transport to the workshop.
  • the sealing housing 18 remains within the support housing 21, suspended from the locking means provided for this purpose in the upper part of the support housing. If a multi-part sealing housing 18 is used, the locking means in the upper support housing part can be dispensed with. In this case, the housing parts which can be detachably connected to one another can be removed individually from the support housing 21 and placed in the vicinity of the agitator.
  • a ready-to-use new or overhauled "sealing module” is available immediately next to the machine, it can be installed in a short time instead of the previously disassembled unit.
  • the work steps required for this result analogously from the work steps of dismantling.
  • the centering 25 permits an exact alignment of the “sealing module” and the sealing housing 18 with only a small expenditure of time.
  • the agitator shaft 5 with the intermediate part 1 must first be placed on the extension 23 on the shoulder 22. In this position, the O-ring 27 seals the passage 9 against the interior of the container.
  • the seal 20 arranged on the sliding surface between the mechanical seal 11 and the sealing housing 18 ensures that when the agitator shaft 5 is lowered, no medium is released into the environment through the gap between the two components. Rather, the mechanical seal 11 fixed to the intermediate part 1 can be lowered like a piston within the sealing housing 18. Subsequently, the space between the sealing housing 18 and the container wall 10 must first be flushed out via the flushing connections 26. Only then can the sealing housing 18 be removed, thereby making the lower disc clutch 4 accessible.
  • the portion of a coaxial agitator shown in FIG. 2 comprises an inner intermediate part 1 '. 1 is connected to an inner drive shaft 3 'via an upper disk clutch 2' and to an inner agitator shaft 5 'via a lower disk clutch 4'.
  • a sealing arrangement 11 'supported within a support housing 21' on a sealing housing 18 'with an axial distance from a passage 9' of the agitator shafts 5 ', 5' 1 consists, in the case of the coaxial agitator shown, of a two-part, double-acting and with sealing liquid mechanical seal for two counter-rotating shafts.
  • the inner part of the mechanical seal 11 ' is connected to the outer intermediate part 1''and consequently rotates with it.
  • the outer part of the mechanical seal 11 ' is screwed non-rotatably to the sealing housing 18' on a support flange 17 '.
  • the exemplary embodiments of agitators shown in FIGS. 1 and 2 correspond to one another.
  • Flushing connections 26 ' are provided on the jacket of the sealing housing 18', flushing connections 26 '' on the shell-like coupling 4 ''.
  • two mounting brackets are provided on the drive side of the mechanical seal 11 ":
  • An inner mounting bracket 15 ' allows the outer intermediate part 1" to be fixed to a protective sleeve 16' of the inner intermediate part 1 ' ⁇ 15 ′′ a connection can be made between the mechanical seal 11 ′ and the outer intermediate part 1 ′′.
  • Paragraphs 22 ′ and 22 ′′ of the inner stirring shaft 5 ′ and the outer stirring shaft 5 ′′ serve as further assembly aids, a recess 23 'of the container wall 10', an inner flange 24 of the outer agitator shaft 5 '' and a centering 25 'between the support housing 21' and the sealing housing 18 '.
  • An inner O-ring 27' and a sealing ring are used to seal the container interior O-ring 27 ''.
  • the barrier liquid lines which are not shown in FIG. 2 and lead to a thermosiphon container, must first be removed.
  • the outer part of the mechanical seal 11 ' is then secured against slipping in the axial direction by pushing and locking the outer mounting bracket 15''into a groove in the outer intermediate part 1''provided for this purpose.
  • the sealing housing 18 ' can be raised, pushed over the mechanical seal 11' and above the upper couplings 2 ', 2''in the support housing by means of fastening means (not shown) Lock 21 '.
  • the lower shell-like coupling 4 ′′ is now exposed, and in particular the screw connections connecting it to the outer intermediate part 1 ′′ and the outer stirring shaft 5 ′′ are easily accessible.
  • the screw connection on the container side is loosened, 'the outer agitator shaft 5''lowers until its shoulder 22''touches the base of the recess 23' of the container wall 10 '.
  • the lower shell-like coupling 4 ′′ is designed as a two-part component, consisting, for example, of two half-shells connected to one another by means of clamping screws, it can be removed after loosening the screw connections Remove dangles from the assembly space between the container wall 10 'and the mechanical seal 11' without any problems.
  • the entire sealing area is then underpinned by means of mounting rails (not shown in FIG. 2) which are pushed through corresponding openings in the support housing 21 'of the agitator drive.
  • the outer intermediate part 1 ′′ together with the mechanical seal 11 ′ sits on the mounting rails and can then be connected to the protective sleeve 16 ′ of the inner intermediate part 1 ′ via the inner mounting tab 15 ′. get connected.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Accessories For Mixers (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Sealing Devices (AREA)

Abstract

Un mécanisme agitateur pour un récipient comprend au moins un arbre agitateur axialement levable et abaissable et un entraînement assujetti par un boîtier de support au récipient, pourvu d'au moins un arbre d'entraînement. L'arbre d'entraînement et l'arbre agitateur sont mutuellement reliés de manière amovible par une pièce intermédiaire à l'extérieur du récipient. La pièce intermédiaire comprend un dispositif d'étanchéité dans le passage de l'arbre agitateur à travers la paroi du récipient. Le dispositif d'étanchéité (11) est axialement espacé par rapport au passage (9) de l'arbre agitateur (5) et s'appuie sur un boîtier étanche (18) qui recouvre la liaison entre la pièce intermédiaire (1) et l'arbre agitateur (5) et qui peut être relié de manière étanche avec l'agencement d'étanchéité (11) et avec la paroi (10) du récipient. En outre, le boîtier étanche (18) et l'agencement d'étanchéité (11) sont télescopables l'un dans l'autre dans le sens axial. Ce mécanisme agitateur, tout en ayant une construction simple et en étant relativement compact, permet de remplacer rapidement la garniture d'étanchéité du passage de l'arbre à travers la paroi du récipient, tant lorsque les arbres agitateurs sont agencés perpendiculairement que lorsqu'ils sont agencés coaxialement.
PCT/EP1991/001525 1990-09-06 1991-08-09 Mecanisme agitateur avec dispositif permettant le remplacement rapide de la garniture d'etancheite WO1992004110A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP91914507A EP0500833B1 (fr) 1990-09-06 1991-08-09 Mecanisme agitateur avec dispositif permettant le remplacement rapide de la garniture d'etancheite
DE59102079T DE59102079D1 (de) 1990-09-06 1991-08-09 Rührwerk mit einrichtung zum dichtungsschnellwechsel.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4028306.2 1990-09-06
DE4028306A DE4028306A1 (de) 1990-09-06 1990-09-06 Ruehrwerk mit einrichtung zum dichtungsschnellwechsel

Publications (1)

Publication Number Publication Date
WO1992004110A1 true WO1992004110A1 (fr) 1992-03-19

Family

ID=6413741

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1991/001525 WO1992004110A1 (fr) 1990-09-06 1991-08-09 Mecanisme agitateur avec dispositif permettant le remplacement rapide de la garniture d'etancheite

Country Status (6)

Country Link
EP (1) EP0500833B1 (fr)
AT (1) ATE107874T1 (fr)
DE (2) DE4028306A1 (fr)
DK (1) DK0500833T3 (fr)
ES (1) ES2062810T3 (fr)
WO (1) WO1992004110A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE234669T1 (de) * 1999-11-10 2003-04-15 Buss Sms Gmbh Verfahrenstechni Mischer und reaktor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1557104B2 (de) * 1966-11-19 1970-06-18 Gerhard Kestermann Zahnraeder Ruehrwerksantrieb
DE1809018A1 (de) * 1968-11-15 1970-12-03 Dieter Kupka Ruehrwerk
DE7525572U (de) * 1975-08-12 1976-03-25 Braren, Rudolf, 8061 Guending Vorrichtung zum Auswechseln der Dichtung eines mit einer Dichtung versehenen Antriebs für Rührwerke
DE3818613A1 (de) * 1988-06-01 1989-12-14 Hoesch & Soehne Eberhard Behaelterruehrwerk
AT391095B (de) * 1989-04-06 1990-08-10 Eisenbeiss Soehne E Ruehrwerksgetriebe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1557104B2 (de) * 1966-11-19 1970-06-18 Gerhard Kestermann Zahnraeder Ruehrwerksantrieb
DE1809018A1 (de) * 1968-11-15 1970-12-03 Dieter Kupka Ruehrwerk
DE7525572U (de) * 1975-08-12 1976-03-25 Braren, Rudolf, 8061 Guending Vorrichtung zum Auswechseln der Dichtung eines mit einer Dichtung versehenen Antriebs für Rührwerke
DE3818613A1 (de) * 1988-06-01 1989-12-14 Hoesch & Soehne Eberhard Behaelterruehrwerk
AT391095B (de) * 1989-04-06 1990-08-10 Eisenbeiss Soehne E Ruehrwerksgetriebe

Also Published As

Publication number Publication date
ES2062810T3 (es) 1994-12-16
DE4028306A1 (de) 1992-03-12
EP0500833B1 (fr) 1994-06-29
DK0500833T3 (da) 1994-11-28
ATE107874T1 (de) 1994-07-15
EP0500833A1 (fr) 1992-09-02
DE59102079D1 (de) 1994-08-04

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