EP0050177B1 - Maschinen mit Deckeln zum Behandeln von Produkten, insbesondere Trockenschleudern - Google Patents

Maschinen mit Deckeln zum Behandeln von Produkten, insbesondere Trockenschleudern Download PDF

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Publication number
EP0050177B1
EP0050177B1 EP80420113A EP80420113A EP0050177B1 EP 0050177 B1 EP0050177 B1 EP 0050177B1 EP 80420113 A EP80420113 A EP 80420113A EP 80420113 A EP80420113 A EP 80420113A EP 0050177 B1 EP0050177 B1 EP 0050177B1
Authority
EP
European Patent Office
Prior art keywords
cover
axis
machine according
basket
tank means
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
Application number
EP80420113A
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English (en)
French (fr)
Other versions
EP0050177A1 (de
Inventor
Michel Martin
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.)
Robatel SLPI SA
Original Assignee
Robatel SLPI SA
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 Robatel SLPI SA filed Critical Robatel SLPI SA
Priority to EP80420113A priority Critical patent/EP0050177B1/de
Publication of EP0050177A1 publication Critical patent/EP0050177A1/de
Application granted granted Critical
Publication of EP0050177B1 publication Critical patent/EP0050177B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B7/00—Elements of centrifuges
    • B04B7/02—Casings; Lids
    • B04B7/06—Safety devices ; Regulating

Definitions

  • the present invention relates to machines, and in particular to centrifugal dryers, in which materials are treated which are liable to give off vapors or gases which may form detonating mixtures with air, entailing risks of explosion.
  • centrifugal dry-washing extractors comprising, outside their cover, a pipe for discharging the vapors of the solvent, generally combustible, but this is of clearly insufficient cross-section to ensure the free passage of '' a pressure wave due to an internal explosion without the appearance of a dangerous overpressure in the machine.
  • the document DE-C-273 735 describes a vertical wringer whose tank is closed by a cover made of a yoke of elastic material, in the form of a truncated cone converging towards the top and whose upper end is closed by a support plate.
  • a cover made of a yoke of elastic material, in the form of a truncated cone converging towards the top and whose upper end is closed by a support plate.
  • a cover can easily be erased, thus avoiding any significant overpressure inside the tank. But then the ignited gases can spread in the workshop at the upper edge of the latter, thus risking reaching the personnel as well as objects neighboring it.
  • the invention aims, on the contrary, to avoid the dangers likely to result from a possible explosion inside a machine for the treatment of products, such as a centrifugal wringer, not by seeking to avoid the formation of a detonating mixture or to resist the overpressure that the explosion of such a mixture can cause, but on the contrary by arranging so that if this explosion occurs, the pressure wave to which it gives rise can s '' Evacuate freely without danger to personnel or equipment.
  • this cover in such a machine comprising a basket suitable for receiving the product to be treated, a tank device surrounding this basket and opening along the axis thereof, and an erasable cover in the form of a trunk of cone with apex situated opposite said device, this cover is established in the form of a nozzle open at its end opposite to the tank device and which is dimensioned so that in the event of an explosion inside With this device, the pressure wave can pass freely through said nozzle and be evacuated without creating a local overpressure liable to damage the walls of the machine or its accessories and without risk to personnel.
  • any explosions, which occur at the ignition limit, are freely evacuated through the upper outlet of the nozzle, which is located at a high level, so that the flames no longer risk burning the staff.
  • the wringer very schematically represented in fig. 1 comprises a fixed lower tank 1 supported for example by elastic means not shown and having along its axis a bearing 2 in which rotates a shaft 3 driven by a motor 4.
  • the shaft 3 carries inside the tank a basket perforated 5 suitable for receiving the products to be wrung.
  • the tank 1 is extended upwards by an envelope or "hoop" 6 which tightens slightly above the basket 5 to carry a short cylindrical sleeve 6a having an inside diameter of the order of that of the outlet of the basket.
  • a pipe 7, possibly fitted with a valve 8, makes it possible to evacuate from the tank the liquid spun during the operation.
  • the sleeve 6a carries an upper flange 6b on which is disposed a seal 9 intended to receive the lower flange 10a of a cover 10 in the form of a truncated cone with a low angle of conicity converging upwards and whose small base defines an upper opening with a large section.
  • a flexible vertical sleeve 11 with an accordion-folded wall, which leads to a pipe 12, also substantially vertical, which opens out of the workshop through an appropriate ventilation opening, preferably equipped with a suction fan, not shown.
  • the flange 10a of the cover 10 is secured to a lateral arm 13 which is articulated around a horizontal transverse axis 14 to a support plate 15 itself secured to a shaft end 16 oriented vertically downwards and which can rotate in a rolling bearing 17 fixed on the top side of the casing or hoop 6.
  • a jack 18 is coupled in 19 to the plate 15 and in 20 to the wall of the cover 10 so as to allow the latter to pivot upwards by a limited angle around the axis of articulation 14.
  • the cylinder 18 is contracted very slightly so as to release the flange 10a from the seal 9 retained by the lower flange 6b.
  • the cover 10 can then be pivoted laterally around the axis of the shaft end 16, as shown in broken lines in FIG. 3 (the operation can be carried out by hand or using, for example, a second cylinder, not shown).
  • the upper opening of the envelope 6 is thus released and the basket 5 can be accessed, for example to fill it with product to be treated.
  • the cover 10 is then brought back and the actuator 18 is actuated at expansion to tighten the seal 9. Then the motor 4 is started in order to carry out the spinning.
  • the drain pipe 7 being of sufficient diameter and the valve 8 not existing or being kept open, the suction fan possibly placed at the end of the pipe 12 ensures normal ventilation inside the machine and the evacuation of the vapors or combustible gases, thus avoiding any risk of explosion, at least with products which are not particularly dangerous.
  • the pressure wave thus caused can freely travel through the cover 10, the sleeve 11 and the pipe 12 without anywhere causing a local overpressure that the walls can not support.
  • the sleeve 11 can also inflate freely with the passage of the wave by damping the latter.
  • the diameter of the tank is 1,200 mm, that of the sleeve 6a and from the lower inlet of the cover 10 of 750 mm, that of the upper outlet of said cover and of the sleeve 11 from 500 to 700 mm.
  • the cover 10 is preferably provided with an oblique side window 10b closed by an observation window 21 through which the operator can monitor the interior of the machine.
  • the glass 21 is provided very resistant to pressure. But to achieve additional security, it can be associated with a television camera 22 which dispenses the operator from remaining close to the wringer during the operation thereof.
  • the tank could be isolated on the one hand by closing the valve 8, on the other hand by arranging between the seal 9 and the flange 10a a frangible shutter diaphragm as indicated in phantom in 23 (fig. 1 made, for example, of paper or plastic of very small thickness.
  • a frangible shutter diaphragm as indicated in phantom in 23 (fig. 1 made, for example, of paper or plastic of very small thickness.
  • the diaphragm 23 can just as easily be arranged at any other point of the wave path, in particular between the sleeve 11 and the cover 10, but its positioning on the seal 9 is easier to carry out, even if it means having to provide it transparent to allow observation by the telescope.

Landscapes

  • Drying Of Solid Materials (AREA)

Claims (7)

1. Vorrichtung zur Behandlung von Produkten, insbesondere eine Zentrifuge, mit einem zur Aufnahme der zu behandelnden Produkte geeigneten Korb (5), einer Wannenanordnung (1) um den Korb herum, und einem Deckel (10) in Form eines Kegelstumpfes, dessen Spitze entgegengesetzt zur Wannenanordnung angeordnet ist, dadurch gekennzeichnet, dass der Deckel (10) in Form einer am zur Wannenanordnung (1) entgegengesetzten Ende offenen Düse ausgebildet ist, die so dimensioniert ist, daß im Fall einer Explosion im Inneren der Wannenanordnung die Druckwelle frei durch besagte Düse laufen und austreten kann, ohne einen lokalen Überdruck zu erzeugen, der die Wände der Maschine oder der Zubehörteile beschädigen könnte, und ohne Risiko für das Personal.
2. Vorrichtung nach Anspruch 1, mit einem im wesentlichen zur Öffnung des Deckels koaxialen inneren Korb, dadurch gekennzeichnet, dass der vom Deckel (10) gebildete Öffnungsquerschnitt der Düse im wesentlichen gleich dem des oberen Ausganges des Korbes (5) ist.
3. Vorrichtung nach Anspruch 1, von der zum Arbeiten im geschlossenen Zustand der Dichtheit vorgesehenen Gattung, dadurch gekennzeichnet, dass sie ein über der Weg einer eventuellen Druckwelle angeordnetes Diaphragma (23) zwischen der Wannenanordnung (1) und dem oberen Ausgang der durch den Deckel (10) gebildeten Düse umfasst.
4. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ihr Deckel (10) sich durch Schwenken um eine parallel zur Achse der Wannenanordnung (1), jedoch seitlich gegenüber dieser verschobenen Achse (Wellenstumpf 16) öffnen lässt.
5. Vorrichtung nach Anspruch 4, mit einer zwischen dem Deckel und der Wannenanordnung vorgesehenen Dichtung, dadurch gekennzeichnet, dass der Deckel (10) schwenkbar um eine senkrecht zur Achse der Wannenanordnung (1) angeordnete seitliche Achse (14) an einer Trägerplatte (15) angebracht ist, die wiederum schwenkbar um die parallel zur Achse der Wannenanordnung angeordnete und seitlich verschobene Achse (Wellenstumpf 16) angebracht ist, derart, dass es möglich ist, den Deckel (10) leicht von seiner Dichtung (9) abzuheben, bevor er seitlich geschwenkt wird.
6. Vorrichtung nach Anspruch 4, bei der der Deckel mit einem Austrittskanal über einen deformierbaren Ärmel verbunden ist, dadurch gekennzeichnet, dass dieser Ärmel (11) die Drehung des Deckels (10) um etwa 180° um die parallel zur Achse der Wannenanordnung (1) angeordnete, jedoch seitlich dazu verschobene Achse (Wellenstumpf 16) erlaubt.
7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass der deformierbare Ärmel (11) nach bekannter Art mit einer Faltenwand, wie bei einem Akkordeon versehen ist.
EP80420113A 1980-10-17 1980-10-17 Maschinen mit Deckeln zum Behandeln von Produkten, insbesondere Trockenschleudern Expired EP0050177B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP80420113A EP0050177B1 (de) 1980-10-17 1980-10-17 Maschinen mit Deckeln zum Behandeln von Produkten, insbesondere Trockenschleudern

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP80420113A EP0050177B1 (de) 1980-10-17 1980-10-17 Maschinen mit Deckeln zum Behandeln von Produkten, insbesondere Trockenschleudern

Publications (2)

Publication Number Publication Date
EP0050177A1 EP0050177A1 (de) 1982-04-28
EP0050177B1 true EP0050177B1 (de) 1985-04-17

Family

ID=8187418

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80420113A Expired EP0050177B1 (de) 1980-10-17 1980-10-17 Maschinen mit Deckeln zum Behandeln von Produkten, insbesondere Trockenschleudern

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1984513A (en) * 1932-02-09 1934-12-18 Angelus Dry cleaning apparatus
GB909453A (en) * 1960-07-11 1962-10-31 Sorvall Inc Ivan Explosion-proof enclosure for centrifuges and the like

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE273735C (de) *

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1984513A (en) * 1932-02-09 1934-12-18 Angelus Dry cleaning apparatus
GB909453A (en) * 1960-07-11 1962-10-31 Sorvall Inc Ivan Explosion-proof enclosure for centrifuges and the like

Also Published As

Publication number Publication date
EP0050177A1 (de) 1982-04-28

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