EP0050177B1 - Machines with lids for the treatment of products, especially centrifugal drying machines - Google Patents

Machines with lids for the treatment of products, especially centrifugal drying machines Download PDF

Info

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
Other languages
German (de)
French (fr)
Other versions
EP0050177A1 (en
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/en
Publication of EP0050177A1 publication Critical patent/EP0050177A1/en
Application granted granted Critical
Publication of EP0050177B1 publication Critical patent/EP0050177B1/en
Expired legal-status Critical Current

Links

Images

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)

Description

La présente invention a trait aux machines, et notamment aux essoreuses centrifuges, dans lesquelles on traite des matières susceptibles de dégager des vapeurs ou des gaz pouvant former avec l'air des mélanges détonants comportant des risques d'explosion.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.

Il est à noter qu'on connaît déjà des essoreuses centrifuges de lavage à sec comportant en dehors de leur couvercle une canalisation d'évacuation des vapeurs du solvant, généralement combustible, mais celle-ci est de section nettement insuffisante pour assurer le libre passage d'une onde de pression due à une explosion intérieure sans apparition d'une surpression dangereuse dans la machine. On a également proposé d'entourer une centrifugeuse de laboratoire d'une enceinte cuirassée en vue de retenir les morceaux en cas d'éclatement mécanique de l'appareil sous l'effet d'une force centrifuge trop élevée, cette enceinte étant pourvue d'un couvercle articulé percé d'une ouverture centrale de surveillance. Mais là encore dans le cas d'une explosion proprement dite sous l'effet d'un mélange détonant ou analogue, l'ouverture serait insuffisante et le couvercle serait brutalement arraché.It should be noted that there are already known 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. It has also been proposed to surround a laboratory centrifuge with a shielded enclosure in order to retain the pieces in the event of mechanical bursting of the apparatus under the effect of a too high centrifugal force, this enclosure being provided with an articulated cover pierced with a central surveillance opening. But here again in the case of an explosion proper under the effect of an explosive mixture or the like, the opening would be insufficient and the cover would be brutally torn off.

Le document DE-C-273 735 décrit une essoreuse verticale dont la cuve est fermée par un couvercle fait d'une chape en matière élastique, en forme de tronc de cône convergent en direction du haut et dont l'extrémité supérieure est fermée par une plaque formant support. En cas d'explosion un tel couvercle peut aisément s'effacer en évitant ainsi toute surpression notable à l'intérieur de la cuve. Mais alors les gaz enflammés peuvent se répandre dans l'atelier au niveau du bord supérieur de cette dernière en risquant donc d'atteindre le personnel ainsi que les objets voisins de celle-ci.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. In the event of an explosion, such 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.

Aussi dans les machines appelées à traiter des produits susceptibles de donner naissance à la formation de mélanges détonants la seule solution actuellement utilisée consiste dans le maintien d'une atmosphère intérieure inerte, ce qui implique l'amenée d'un gaz particulier extrêmement coûteux.Also in the machines called upon to treat products capable of giving rise to the formation of detonating mixtures, the only solution currently used consists in maintaining an inert interior atmosphere, which implies the supply of a particular gas which is extremely expensive.

L'invention vise au contraire à éviter les dangers susceptibles de résulter d'une explosion éventuelle à l'intérieur d'une machine pour le traitement de produits, telle qu'une essoreuse centrifuge, non pas en cherchant à éviter la formation d'un mélange détonant ou à résister à la surpression que l'explosion d'un tel mélange peut provoquer, mais bien au contraire en s'arrangeant pour que si cette explosion vient à se produire, l'onde de pression à laquelle elle donne naissance puisse s'évacuer librement sans danger ni pour le personnel, ni pour le matériel.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.

Conformément à l'invention, dans une telle machine comprenant un panier propre à recevoir le produit à traiter, un dispositif de cuve entourant ce panier et s'ouvrant suivant l'axe de celui-ci, et un couvercle effaçable en forme de tronc de cône à sommet situé à l'opposé dudit dispositif, ce couvercle est établi sous la forme d'une tuyère ouverte à son extrémité opposée au dispositif de cuve et qui est dimensionnée de façon telle qu'en cas d'explosion à l'intérieur de ce dispositif, l'onde de pression puisse traverser librement ladite tuyère et s'évacuer sans créer une surpression locale susceptible d'endommager les parois de la machine ou de ses accessoires et sans risque pour le personnel.According to the invention, 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.

Avec une telle disposition, les explosions éventuelles, qui se produisent à la limite d'inflammation, s'évacuent librement par le débouché supérieur de la tuyère, lequel est situé à un niveau élevé, de sorte que les flammes ne risquent plus de brûler le personnel. On peut d'ailleurs prolonger cette tuyère par une manche reliée à une canalisation d'évacuation et assez souple pour ne pas gêner l'ouverture du couvercle.With such an arrangement, 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. We can also extend this nozzle by a sleeve connected to an evacuation pipe and flexible enough not to interfere with the opening of the cover.

Si l'on désire éviter la circulation d'air à l'intérieur de la machine, on peut serrer entre le couvercle et la cuve de celle-ci un obturateur aisément frangible qui assure l'étanchéité sans gêner pratiquement le passage d'une onde d'explosion.If one wishes to avoid the circulation of air inside the machine, one can tighten between the cover and the tank of this one an easily frangible obturator which ensures sealing without practically hindering the passage of a wave explosion.

Le dessin annexé, donné à titre d'exemple, permettra de mieux comprendre l'invention, les caractéristiques qu'elle présente et les avantages qu'elle est susceptible de procurer:

  • Fig. 1 est une coupe schématisée d'une essoreuse centrifuge comportant application de l'invention, cette vue ne montrant que les dispositions générales.
  • Fig. 2 est une coupe de détail de la partie supérieure de l'essoreuse avec indication des détails de l'articulation de couvercle et de la lunette d'observation.
  • Fig. 3 est une coupe suivant III-III (fig. 2).
The appended drawing, given by way of example, will allow a better understanding of the invention, the characteristics which it presents and the advantages which it is capable of providing:
  • Fig. 1 is a schematic section of a centrifugal wringer comprising application of the invention, this view showing only the general provisions.
  • Fig. 2 is a detail section of the upper part of the wringer with an indication of the details of the cover joint and of the observation scope.
  • Fig. 3 is a section along III-III (fig. 2).

L'essoreuse très schématiquement réprésentée en fig. 1 comprend une cuve inférieure fixe 1 supportée par exemple par des moyens élastiques non représentés et comportant suivant son axé un palier 2 dans lequel tourne un arbre 3 entraîné par un moteur 4. L'arbre 3 porte à l'intérieur de la cuve un panier perforé 5 propre à recevoir les produits à essorer. La cuve 1 se prolonge vers le haut par une enveloppe ou "cerce" 6 qui se resserre légèrement au-dessus du panier 5 pour porter un court manchon cylindrique 6a présentant un diamètre intérieur de l'ordre de celui du débouché du panier. Une canalisation 7, éventuellement équipée d'une vanne 8, permet d'évacuer de la cuve le liquide essoré pendant l'opération.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.

Le manchon 6a porte une bride supérieure 6b sur laquelle est disposé un joint d'étanchéité 9 destiné à recevoir la bride inférieure 10a d'un couvercle 10 en forme de tronc de cône à faible angle de conicité convergeant vers le haut et dont la petite base définit une ouverture supérieure à forte section. A cette petite base se raccorde une manche verticale souple 11 à paroi repliée en accordéon, laquelle aboutit à une conduite 12, elle aussi substantiellement verticale, qui débouche à l'extérieur de l'atelier par une ouverture de ventilation appropriée, préférablement équipée d'un ventilateur aspirant, non représenté.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. To this small base is connected 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.

Comme le montrent les coupes de détail de fig. 2 et 3, la bride 10a du couvercle 10 est solidaire d'un bras latéral 13 qui vient s'articuler autour d'un axe horizontal transversal 14 à un plateau- support 15 lui-même solidaire d'un bout d'arbre 16 orienté verticalement vers le bas et qui peut tourner dans un palier à roulements 17 fixé sur le côté du haut de l'enveloppe ou cerce 6. Un vérin 18 est attelé en 19 au plateau 15 et en 20 à la paroi du couvercle 10 de manière à permettre de faire pivoter ce dernier vers le haut d'un angle limité autour de l'axe d'articulation 14.As shown in the detail sections of fig. 2 and 3, 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.

Pour ouvrir l'essoreuse on contracte très légèrement le vérin 18 afin de dégager la bride 10a du joint 9 retenu par la bride inférieure 6b. On peut alors faire pivoter latéralement le couvercle 10 autour de l'axe du bout d'arbre 16, comme montré en traits interrompus en fig. 3 (la manoeuvre pouvant s'effectuer à la main ou à l'aide par exemple d'un second vérin, non représenté). L'ouverture supérieure de l'enveloppe 6 est ainsi dégagée et l'on peut accéder au panier 5, par exemple pour le remplir de produit à traiter. On ramène ensuite le couvercle 10 et l'on actionne le vérin 18 à la dilatation pour serrer le joint 9. Puis on met en marche le moteur 4 afin de réaliser l'essorage. La canalisation de vidange 7 étant de diamètre suffisant et la vanne 8 n'existant pas ou étant maintenue ouverte, le ventilateur aspirant éventuellement disposé en bout de la conduite 12 assure la ventilation normale à l'intérieur de la machine et l'évacuation des vapeurs ou gaz combustibles en évitant ainsi tout risque d'explosion, du moins avec des produits non particulièrement dangereux..En tout cas, même s'il se forme dans la cuve un mélange explosif qui s'enflamme au contact d'une étincelle ou d'un point chaud, l'onde de pression ainsi provoquée peut librement cheminer à travers le couvercle 10, la manche 11 et la conduite 12 sans provoquer nulle part une surpression locale que les parois ne puisse supporter. La manche 11 peut d'ailleurs se gonfler librement au passage de l'onde en amortissant celle-ci.To open the wringer, 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. In any case, even if an explosive mixture forms in the tank which ignites on contact with a spark or 'a hot spot, 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.

Pour fixer les idées par un exemple en ce qui concerne les dimensions relatives du passage d'évacuation de l'onde de pression précitée, on peut signaler que dans des réalisations pratiques le diamètre de la cuve est de 1 200 mm, celui du manchon 6a et de l'entrée inférieure du couvercle 10 de 750 mm, celui du débouché supérieur dudit couvercle et de la manche 11 de 500 à 700 mm.To fix the ideas by an example as regards the relative dimensions of the passage for evacuating the aforementioned pressure wave, it may be pointed out that in practical embodiments 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.

Comme à l'ordinaire le couvercle 10 est préférablement pourvu d'une lunette latérale oblique 10b fermée par une glace d'observation 21 à travers laquelle l'opérateur peut surveiller l'intérieur de la machine. Bien entendu la glace 21 est prévue très résistante à la pression. Mais pour réaliser un surcroît de sécurité, on peut lui associer une caméra de télévision 22 qui dispense l'opérateur de demeurer près de l'essoreuse pendant le fonctionnement de celle-ci.As usual, 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. Of course 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.

Si l'opération d'essorage devait s'effectuer en milieu fermé, on pourrait isoler la cuve d'une part en fermant la vanne 8, d'autre part en disposant entre le joint 9 et la bride 10a un diaphragme obturateur frangible comme indiqué en traits mixtes en 23 (fig. 1 fait par exemple en paper ou matière plastique de très faible épaisseur. En cas d'explosion intérieure un tel diaphragme n'opposerait à l'onde de pression qu'une résistance pratiquement nulle et ne gênerait donc pas se libre évacuation. Bien entendu le diaphragme 23 peut tout aussi bien être disposé en n'importe quel autre point du trajet de l'onde, notamment entre la manche 11 et le couvercle 10, mais sa mise en place sur le joint 9 est plus facile à réaliser, quitte à avoir à le prévoir transparent pour permettre l'observation par la lunette.If the spinning operation were to be carried out in a closed environment, 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. In the event of an internal explosion, such a diaphragm would oppose the pressure wave only practically zero resistance and would therefore not interfere not free evacuation. Of course 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.

Il doit d'ailleurs être entendu que la description qui précède n'a été donnée qu'à titre d'exemple et qu'elle ne limite nullement le domaine de l'invention.It should moreover be understood that the above description has been given only by way of example and that it in no way limits the field of the invention.

Claims (7)

1. Machine for the treatment of products, and in particular a centrifugal drier, comprising a basket (5) suitable to receive the product which is to be treated, a tank means (1) surrounding this basket and opening following the axis of the basket, and a cover (10), able to be drawn aside, in the form of a frustum of a cone with an apex situated opposite the said means, characterized in that this cover (10) is contructed in the form of a pipe which is open at its end opposite the tank means (1) and which is dimensioned such that in the case of explosion on the interior of this means, the pressure wave may pass freely through the said pipe (10) and be evacuated without creating a local excess pressure liable to damage the walls of the machine or its accessories and without risk to personnel.
2. Machine according to Claim 1, with an interior basket substantially coaxial to the opening of the cover, characterized in that the cross- section of the opening of the pipe constituted by the cover (10) is substantially equal to that of the upper outlet of the basket (5).
3. Machine according to Claim 1, of the type provided to operate in closed state in a right manner, characterized in that it comprises a breakable diaphragm (23) arranged in the path of a possible pressure wave between the tank means (1) and the upper outlet of the pipe constituted by the cover (10).
4. Machine according to any one of the preceding Claims, characterized in that its cover (10) opens by pivoting about an axis (shaft end 16) parallel to that of the tank means (1) but offset laterally in relation to the latter.
5. Machine according to Claim 4, with a tightness joint provided between the cover and the tank means, characterized in that the cover (10) is articulated about a lateral axis (14) perpendicular to that of the tank means (1) with a support plate (15), which itself is articulated about the axis (shaft end 16) parallel to the axis of this device and staggered laterally, such that it is possible to slightly raise the said cover (10) from its tightness joint (9) before pivoting it laterally.
6. Machine according to Claim 4, in which the cover is joined to a system of evacuation channels by a deformable sleeve, characterized in that this sleeve (11) is provided so as to allow the rotation of the cover (10) of approximately 180° about its axis (shaft end 16) parallel to that of the tank means (1), but offset laterally.
7. Machine according to Claim 6, characterized in that the deform,::!::!:; sleeve (11) is of a known type with concertina-pleated walls.
EP80420113A 1980-10-17 1980-10-17 Machines with lids for the treatment of products, especially centrifugal drying machines Expired EP0050177B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP80420113A EP0050177B1 (en) 1980-10-17 1980-10-17 Machines with lids for the treatment of products, especially centrifugal drying machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP80420113A EP0050177B1 (en) 1980-10-17 1980-10-17 Machines with lids for the treatment of products, especially centrifugal drying machines

Publications (2)

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

Family

ID=8187418

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80420113A Expired EP0050177B1 (en) 1980-10-17 1980-10-17 Machines with lids for the treatment of products, especially centrifugal drying machines

Country Status (1)

Country Link
EP (1) EP0050177B1 (en)

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 (en) *

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 (en) 1982-04-28

Similar Documents

Publication Publication Date Title
EP1869534B1 (en) Valve adjusting device for fire extinguishing systems
EP0050177B1 (en) Machines with lids for the treatment of products, especially centrifugal drying machines
CH616506A5 (en) Device for aseptic sampling
EP0018881B1 (en) Process for reducing the risks of inflammation and explosion as a result of the decomposition of ethylene under high pressure, and device for carrying out the process
FR2465423A1 (en) DRAGEIFICATION DEVICE
EP0055665A1 (en) Process for avoiding heat damage to the motor of an emergency smoke extractor ventilator, and apparatus for the realization of that process
FR2460719A1 (en) Explosion relief vent for cover of drying centrifuge etc. - carries pressure wave through flexible sleeve to exhaust duct
FR2545381A1 (en) Improvements to lidded machines for the treatment of products, and especially to centrifugal dryers
EP0120777B1 (en) Device for the observation of the interior of a cryogenic tank in service
FR2733923A1 (en) MATRAS SHUTTERING SYSTEM AND MICROWAVE PROCESSING APPARATUS HAVING SUCH A SHUTTERING SYSTEM
EP0332490B1 (en) Ladle for transporting especially liquid metals
FR2521534A1 (en) RESERVOIR FOR BULK COAL
FR2581729A1 (en) Ball valve
EP0663991A1 (en) Waste incineration apparatus and plant.
FR2504659A1 (en) Security valve for gas heater combustion chamber - has vented sealed box equalising pressure on chamber flexible wall
EP2815809B1 (en) Device for loading deliquescent solids for a drying device of a fluid in liquid or gaseous form and method for using such a loading device
FR3008482A1 (en) IMPROVEMENT IN HEATING INSTALLATIONS WITH SMOKE EXHAUST DUCT PROVIDED WITH A COMBUSTION AIR INLET
EP0246992B1 (en) Device for the introduction of a probe into a melting-reduction furnace
FR2706313A1 (en) Fire protection device for vehicles equipped with a fuel tank
CA2086371A1 (en) Uitraviolet dryer for labelling machines having multiple printing groups
FR2666992A1 (en) Safety device for a storage tank containing inflammable products
FR2631252A2 (en) Laminar flow enclosure with a housing for removing waste
BE444175A (en)
WO1999005050A1 (en) Device for recuperating liquids
FR2608939A1 (en) IMPROVED FILTER-DRYING PROCESS AND DEVICE

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE CH GB IT NL

17P Request for examination filed

Effective date: 19820802

ITF It: translation for a ep patent filed

Owner name: MODIANO & ASSOCIATI S.R.L.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): BE CH GB IT LI NL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Effective date: 19851031

Ref country code: LI

Effective date: 19851031

Ref country code: BE

Effective date: 19851031

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
BERE Be: lapsed

Owner name: ROBATEL S.L.P.I. S.A.

Effective date: 19851031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19860501

GBPC Gb: european patent ceased through non-payment of renewal fee
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19881118