EP0021999A1 - Device for aeration by sudden discharge of compressed air - Google Patents

Device for aeration by sudden discharge of compressed air Download PDF

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Publication number
EP0021999A1
EP0021999A1 EP19800400904 EP80400904A EP0021999A1 EP 0021999 A1 EP0021999 A1 EP 0021999A1 EP 19800400904 EP19800400904 EP 19800400904 EP 80400904 A EP80400904 A EP 80400904A EP 0021999 A1 EP0021999 A1 EP 0021999A1
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EP
European Patent Office
Prior art keywords
compressed air
inlet orifice
discharge
valve
tank
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.)
Granted
Application number
EP19800400904
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German (de)
French (fr)
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EP0021999B1 (en
Inventor
Jacques Albert Lestoquoy
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A Responsabilite Dite Ermap Ltee Ste
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A Responsabilite Dite Ermap Ltee Ste
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Publication of EP0021999A1 publication Critical patent/EP0021999A1/en
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Publication of EP0021999B1 publication Critical patent/EP0021999B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/54—Large containers characterised by means facilitating filling or emptying
    • B65D88/64—Large containers characterised by means facilitating filling or emptying preventing bridge formation
    • B65D88/70—Large containers characterised by means facilitating filling or emptying preventing bridge formation using fluid jets
    • B65D88/703—Air blowing devices, i.e. devices for the sudden introduction of compressed air into the container

Definitions

  • the present invention relates to an aeration device by sudden discharge of compressed air, in particular to facilitate the flow of stored materials, of the type comprising a compressed air storage tank provided with an inlet orifice capable of '' be connected to a compressed air supply source via a three-way valve, a discharge pipe of the stored compressed air, which pipe extends substantially over the entire length of the tank and extends to the exterior of the tank to open into an enclosure to be aerated, and valve means for firstly, communicating the interior of the tank, except said pipe, with the air supply orifice compressed, and on the other hand, in a second step close the inlet port and put the interior of the tank in communication with said discharge line, the inlet port connected to the compressed air supply source being arranged in the axis of the said discharge line, at a distance from the internal end of the latter which constitutes a valve seat.
  • Such a device capable of recharging from ordinary sources of compressed air is thus provided for producing intermittently, sudden discharges of a predetermined volume of compressed air, in the very mass of the products which it is desired to aerate and whose flow we want to improve.
  • the existing devices are relatively expensive and time-consuming to manufacture because they require the use of a machined piston.
  • the presence of a piston of fairly large mass subjected to sudden backward movements constitutes a drawback insofar as in particular the kinetic energy put is not negligible.
  • the present invention aims precisely to remedy the aforementioned drawbacks and to allow the production of a shock wave ventilation device which is both safe, inexpensive, easy to manufacture, and of greater efficiency thanks to a simpler design of the various components.
  • valve means comprise at least one flexible membrane interposed between the internal end of the discharge line and said inlet port, and capable of alternately closing off the only internal end of the discharge line when the pressure of the compressed air from the power source is applied to the port inlet, and the closure of the single inlet orifice when the pressure of the compressed air from the supply source is no longer exerted thereon, and said membrane is arranged substantially perpendicular to the axis of the exhaust pipe and the inlet orifice and has at least one perforation in its part situated between the internal end of the exhaust pipe and the part forming the outer wall of the compressed air storage tank.
  • the inlet orifice is formed in a removable piece attached to the end of the storage tank which is close to the internal end of the exhaust pipe and has an opening of section greater than the section of the exhaust pipe and the peripheral part of the membrane of the valve means is fixed between the end of the storage tank and said removable removable part.
  • said removable end piece attached has an internal part of substantially frustoconical shape.
  • the central part of the diaphragm forming a valve is clamped between two rigid plates cooperating respectively with the internal end of the exhaust pipe and the contour of the inlet orifice forming seats valve.
  • FIG. 1 shows a container or container 100, such as a hopper, filled with pulverulent or granular products 101. It is desirable that such a hopper 100 is static and not equipped with a vibrator in order to avoid settling of the product 101 which must flow by gravity and escape through the lower opening 103. In order to destroy the vaults, bridges, chimneys which naturally tend to form by the agglomeration of particles of product 101. in particular in the vicinity of the walls of lower slope such as 104, one or more devices 1 for aeration by sudden discharge of compressed air are mounted on the same wall of the container 100.
  • Each aeration device 1 essentially comprises a reservoir 10 for storing compressed air, extended by an exhaust duct 9 provided with a coupling device, for example with a flange 91, to facilitate mounting of the device 1 on the container 100.
  • the exhaust duct 9 or an associated duct extends to the interior of the container 100.
  • an assembly 8 controls the arrival of compressed air in the tank proper 10 from a pipe 7 connected via a three-way valve 6 to a normal network 4 for supplying compressed air, for example at a pressure between about 4 and 16 bars .
  • the valve 6 controls the filling of the tank 10 by putting the pipe 7 into communication with the compressed air supply network 4, and the emptying of the tank 10 by putting the pipe 7 into communication with the exhaust 5.
  • the assembly 8 of the aeration device 1 automatically causes the immediate discharge of the compressed air contained in the reservoir 10, through the conduit 9 to produce a shock wave 102 inside container 100.
  • a tank 10 the capacity of which depends on the applications envisaged and can for example be between approximately 10 and 150 liters, but can also reach values very superior, is formed for example from two caps 11, 12 sheet steel welded tightly to form a pressure-resistant enclosure.
  • One of the ends of the tank 10, for example the cap 11, is crossed by an exhaust duct 9 whose section is very substantially smaller than the tank section 10.
  • the axial duct 9 which emerges outside the tank 10 is tightly fixed, for example by welding, to the cap 11 and is extended by a portion 90 over the major part of the length of the reservoir 10. As can be seen in FIG.
  • the cap 12 can be provided with an opening 13 with a diameter greater than the diameter of the conduit 90 and a portion 14 can be attached to the cap 12, around the opening 13.
  • the portion of the conduit 90 can relate beyond the defined surface by the simple cap 12 and ending in the vicinity of the end of the attached part 14.
  • the end 92 of the conduit 90 is designed to constitute a valve seat intended to cooperate with a valve 2 integral with a membrane 22 arranged transversely relative to the pipe section t 90.
  • the flexible membrane 22 which may for example be made of rubber is fixed by its periphery to the end 14 of the reservoir 10.
  • the membrane 22 sealingly closes the part 14 with the exception of one or more small calibrated orifices 26 formed in the membrane in its crown-shaped part disposed between the internal end of the conduit 92 of the conduit 90 and the part of the wall 14 of the reservoir 10.
  • An insert 8 provided with an inlet orifice 81 is removably attached to the end portion 14 of the reservoir 10 by connecting means such as bolts 83, 84 engaged in orifices 82.
  • the bottom part removable 8 especially clamps the peripheral part of the membrane 22 on the part 14.
  • a small free space is provided between the internal wall of the bottom part 8 and the end 92 of the section of conduit 90 so as to allow a certain clearance of the membrane 22 carrying the valve 2 between the end 92 of the axial exhaust duct and the internal wall 30 of the bottom part 8.
  • An axial inlet orifice 81 is formed in the bottom part 8 and is intended to be connected to a pipe 7.
  • the internal wall 30 of the bottom part 8 can be for example of frustoconical shape and delimits with the membrane 2 a chamber 31 which is placed in communication with the pipe 7 by the inlet port 81 and with the interior of the tank 10 by calibrated ports 26.
  • the membrane 22 can be sandwiched between two plates 21, 23 cooperating respectively with the end 92 of the duct section 90 and a bearing 85 of the internal wall 30 of the bottom part 8.
  • the bearing 85 constitutes a valve seat for the plate 23 around the inlet orifice 81.
  • the plates 21, 23 are assembled to the membrane 22 in a leaktight manner, using an assembly means such as 24.
  • a spring 25 can cooperate with the valve 21, 22, 23 for adjusting the stiffness of the membrane 22.
  • the valve 6, which is a conventional 3/2 way valve or solenoid valve, puts the pipe 7 in communication with the source 4 of compressed air supply.
  • the compressed air enters through the inlet orifice 81 of the bottom part 8 into the chamber 31 and pushes the membrane 22 which presses the valve 21 against the end 92 of the section conduit 90 thus closing the opening of the latter.
  • the compressed air then passes from the chamber 31 inside the tank 10, except the conduit 90, through the orifices 26 of the membrane 22.
  • the interior of the conduit 90 being at atmospheric pressure, the assembly 2 remains plated against the end 92 of the conduit 90 during the entire time of filling of the reservoir 10 with compressed air.
  • the cycle can start again and the tank 10 is recharged as indicated above by placing the pipe 7 in communication with the compressed air supply 4 by the valve 6.
  • the device according to the invention is particularly remarkable in that the power supply in compressed air is operated axially from the inlet orifice 81, as is the discharge through the axial tube 9.
  • the arrival and departure in line of the compressed air contribute to ensuring easy and safe operation of the system, especially since the only mobile assembly is constituted by the membrane 22 which with its associated elements is of low mass and has a limited clearance.
  • the device according to the invention is particularly compact because the valve means constituted by the assembly 2 forming a valve and the bottom part 8 have a limited bulk in the axial direction.

Abstract

1. Ventilation device by sudden release of compressed air particularly to help the flow of stored materials, of the type comprising a reservoir (10) for storing compressed air provided with an inlet orifice (81) adapted to be connected to a source (4) supplying compressed air via a three-way valve (6), a conduit (9) to discharge the stored compressed air, which conduit extends substantially over the entire length of the reservoir (10) and projects out of said reservoir to issue into an enclosure (100) to be ventilated, and valve means (2) provided on the one hand to first create a communication between the inside of the reservoir (10), excepting said conduit (9), and the orifice (81) supplying the compressed air, and on the other hand, to later close the said inlet orifice (81) and create a communication between the inside of the reservoir (10) and the said discharge conduit (9), said inlet orifice (81) connected to the source supplying the compressed air being in alignment with the said discharge (9), at a distance from the inner end (92) thereof which constitutes a valve seat, characterized in that the valve means (2) comprise at least a flexible membrane (22) interposed between the inner end (92) of the discharge and said inlet orifice (81), capable of alternately closing off only the inner end (92) of the discharge when the compressed air pressure of the supply source is applied on the inlet orifice (81), and the closing off of the inlet orifice (81) only when the compressed air pressure of the supply source (4) is no longer exerted thereon, and in that the said membrane (22) is placed substantially perpendicularly to the axis of the discharge (9) and of the inlet orifice (81) and presents at least one perforation (26) in its part situated between the inner end of the discharge and the part (14) forming the outer wall of the compressed air storage reservoir.

Description

La présente invention a pour objet un dispositif d'aération par décharge brusque d'air comprimé, notamment pour faciliter l'écoulement de matières stockées, du type comprenant un réservoir de stockage d'air comprimé muni d'un orifice d'entrée susceptbile d'être relié à une source d'alimentation en air comprimé par l'intermédiaire d'une vanne à trois voies, une conduite de décharge de l'air comprimé stocké, laquelle conduite sétend sensiblement sur toute la longueur du réservoir et se prolonge à l'extérieur du réservoir pour déboucher dans une enceinte à aérer, et des moyens de valve pour d'une part, dans un premier temps, mettre en communication l'intérieur du réservoir, sauf ladite conduite, avec l'orifice d'alimentation en air comprimé, et d'autre part, dans un deuxième temps obturer l'orifice d'entrée et mettre en communication l'intérieur du réservoir avec ladite conduite de décharge, l'orifice d'entrée relié à la source d'alimentation en air comprimé étant disposé dans l'axe de ladite conduite de décharge, à distance de l'extrémité interne de cette dernière qui constitue un siège de soupape.The present invention relates to an aeration device by sudden discharge of compressed air, in particular to facilitate the flow of stored materials, of the type comprising a compressed air storage tank provided with an inlet orifice capable of '' be connected to a compressed air supply source via a three-way valve, a discharge pipe of the stored compressed air, which pipe extends substantially over the entire length of the tank and extends to the exterior of the tank to open into an enclosure to be aerated, and valve means for firstly, communicating the interior of the tank, except said pipe, with the air supply orifice compressed, and on the other hand, in a second step close the inlet port and put the interior of the tank in communication with said discharge line, the inlet port connected to the compressed air supply source being arranged in the axis of the said discharge line, at a distance from the internal end of the latter which constitutes a valve seat.

L'écoulement des produits par exemple granulaires ou pulvérulents stockés en silos, trémies, convoyeurs ou similaires présente souvent des difficultés du fait de la formation de ponts, voûtes ou cheminées qui constituent des zones critiques de colmatage où les produits sont comprimés et bloqués.The flow of products, for example granular or pulverulent stored in silos, hoppers, conveyors or the like often presents difficulties due to the formation of bridges, vaults or chimneys which constitute critical areas of clogging where the products are compressed and blocked.

Afin de libérer les produits accumulés dans des zones de colmatage, il est connu de procéder dans le silo ou récipient de stockage de produits, à des décharges brusques d'air comprimé préalablement accumulé dans un réservoir relié à une source d'alimentation en air comprimé. De telles décharges brusques sont réalisées à l'aide d'appareils dits canons à air comprimé qui comprennent une chambre à piston reliée par l'intermédiaire d'une vanne à un réseau de distribution d'air comprimé, un tuyau d'éjection et un réservoir disposé autour du tuyau d'éjection et de la chambre à piston. Dans un tel système, l'air comprimé entrant dans la chambre à piston repousse celui-ci vers l'avant afin d'obturer le tuyau d'éjection et permettre l'entrée d'air dans le réservoir grâce à une petite ouverture latérale libérée entre la chambre à piston et le réservoir. Lorsque le réservoir a été rempli d'air comprimé, il est possible de provoquer une décharge brutale de l'air par le tuyau d'éjection en diminuant brusquement la pression dans la chambre à piston de sorte que le piston se décolle de l'extrémité du tuyau d'éjection et est renvoyé en arrière par la presssion de l'air accumulée dans le réservoir. L'air s'échappe alors par le tuyau d'éjection et produit, dans le silo ou récipient où les produits sont accumulés,une véritable onde de choc qui fluidifie les produits stockés et favorise ainsi leur écoulement.In order to release the products accumulated in clogging areas, it is known to proceed in the silo or product storage container, to sudden discharges of compressed air previously accumulated mule in a tank connected to a compressed air supply source. Such sudden discharges are carried out using devices known as compressed air cannons which include a piston chamber connected by means of a valve to a compressed air distribution network, an ejection pipe and a tank arranged around the ejection pipe and the piston chamber. In such a system, the compressed air entering the piston chamber pushes it forward in order to close the ejection pipe and allow the entry of air into the tank thanks to a small side opening released. between the piston chamber and the tank. When the tank has been filled with compressed air, it is possible to cause a sudden discharge of air through the ejection pipe by abruptly reducing the pressure in the piston chamber so that the piston comes off from the end of the ejection pipe and is sent back by the pressure of the air accumulated in the tank. The air then escapes through the ejection pipe and produces, in the silo or container where the products are accumulated, a real shock wave which fluidizes the stored products and thus promotes their flow.

Un tel dispositif, capable de se recharger à partir de sources ordinaires d'air comprimé est ainsi prévu pour produire par intermittence, des décharges brusques d'un volume prédéterminé d'air comprimé, dans la masse même des produits que l'on désire aérer et dont on veut améliorer l'écoulement. Toutefois, les dispositifs existants sont relativement coûteux et longs à fabriquer car ils nécessitent la mise en oeuvre d'un piston usiné. En outre, la présence d'un piston de masse assez importante soumis à des mouvements de recul brusques constitue un inconvénient dans la mesure où notamment l'énergie cinétique mise en oeuvre est non négligeable.Such a device, capable of recharging from ordinary sources of compressed air is thus provided for producing intermittently, sudden discharges of a predetermined volume of compressed air, in the very mass of the products which it is desired to aerate and whose flow we want to improve. However, the existing devices are relatively expensive and time-consuming to manufacture because they require the use of a machined piston. In addition, the presence of a piston of fairly large mass subjected to sudden backward movements constitutes a drawback insofar as in particular the kinetic energy put is not negligible.

La présente invention vise précisément à remédier aux inconvénients précités et à permettre la réalisation d'un dispositif d'aération par onde de choc qui soit à la fois sûr, peu coûteux, facile à fabriquer, et d'une plus grande efficacité grâce à une conception plus simple des divers éléments constitutifs.The present invention aims precisely to remedy the aforementioned drawbacks and to allow the production of a shock wave ventilation device which is both safe, inexpensive, easy to manufacture, and of greater efficiency thanks to a simpler design of the various components.

Ces buts sont atteints grâce à un dispositif d'aération par décharge brusque d'air comprimé, du type mentionné au début, dans lequel, conformément à l'invention, les moyens de valve comprennent au moins une membrane flexible interposée entre l'extrémité interne de la conduite de décharge et ledit orifice d'entrée, et capable de réaliser alternativement l'obturation de la seule extrémité interne de la conduite de déchargé lorsque la pression de l'air comprimé de la source d'alimentation est appliquée sur l'orifice d'entrée, et l'obturation du seul orifice d'entrée lorsque la pression de l'air comprimé de la source d'alimentation n'est plus exercée sur celui-ci, et ladite membrane est disposée sensiblement perpendiculairement à l'axe de la conduite d'échappement et de l'orifice d'entrée et présente au moins une perforation dans sa partie située entre l'extrémité interne de la conduite d'échappement et la partie formant paroi extérieure du réservoir de stockage d'air comprimé.These aims are achieved by means of an aeration device by sudden discharge of compressed air, of the type mentioned at the start, in which, in accordance with the invention, the valve means comprise at least one flexible membrane interposed between the internal end of the discharge line and said inlet port, and capable of alternately closing off the only internal end of the discharge line when the pressure of the compressed air from the power source is applied to the port inlet, and the closure of the single inlet orifice when the pressure of the compressed air from the supply source is no longer exerted thereon, and said membrane is arranged substantially perpendicular to the axis of the exhaust pipe and the inlet orifice and has at least one perforation in its part situated between the internal end of the exhaust pipe and the part forming the outer wall of the compressed air storage tank.

De façon préférentielle, l'orifice d'entrée est formé dans une pièce démontable rapportée à l'extrémité du réservoir de stockage qui est voisine de l'extrémité interne de la conduite d'échappement et présente une ouverture de section supérieure à la section de la conduite d'échappement et la partie périphérique de la membrane des moyens de valve est fixée entre l'extrémité du réservoir de stockage et ladite pièce démontable rapportée.Preferably, the inlet orifice is formed in a removable piece attached to the end of the storage tank which is close to the internal end of the exhaust pipe and has an opening of section greater than the section of the exhaust pipe and the peripheral part of the membrane of the valve means is fixed between the end of the storage tank and said removable removable part.

Dans ce cas, ladite pièce démontable d'extrémité rapportée présente une partie interne de forme sensiblement tronconique.In this case, said removable end piece attached has an internal part of substantially frustoconical shape.

Selon encore une autre caractéristique de l'invention, la partie centrale de la membrane formant clapet est serrée entre deux plaques rigides coopérant respectivement avec l'extrémité interne de la conduite d'échappement et le contour de l'orifice d'entrée formant sièges de soupape.According to yet another characteristic of the invention, the central part of the diaphragm forming a valve is clamped between two rigid plates cooperating respectively with the internal end of the exhaust pipe and the contour of the inlet orifice forming seats valve.

D'autres caractéristiques et avantages de la présente invention apparaîtront mieux à la lecture de la description qui fait suite d'un mode particulier de réalisation, en référence aux dessins annxés, sur lesquels :

  • - la figure 1 est une vue schématique montrant l'agencement d'un dispositif d'aération sur un silo rempli de produits à écouler,
  • - la figure 2 est une vue en élévation avec arrachement d'un exemple de dispositif d'aération conforme à la présente invention,
  • - les figures 3 et 4 sont des vues schématiques en coupe axiale d'un dispositif d'aération selon l'invention respectivement en position de remplissage et en position de décharge.
Other characteristics and advantages of the present invention will appear better on reading the description which follows a particular embodiment, with reference to the appended drawings, in which:
  • FIG. 1 is a schematic view showing the arrangement of an aeration device on a silo filled with products to be drained,
  • FIG. 2 is a cutaway elevation view of an example of a ventilation device in accordance with the present invention,
  • - Figures 3 and 4 are schematic views in axial section of a ventilation device according to the invention respectively in the filling position and in the discharge position.

La figure 1 montre un récipient ou conteneur 100, tel qu'une trémie, rempli de produits pulvérulents ou granulaires 101. Il est souhaitable qu'une telle trémie 100 soit statique et non équipée de vibreur afin d'éviter des tassements du produit 101 qui doit s'écouler par gravité et s'échapper par l'ouverture inférieure 103. Afin de détruire les voûtes, ponts, cheminées qui de façon naturelle tendent à se former par l'agglomération de particules du produit 101 . notamment au voisinage des parois de plus faible pente telles que 104, un ou plusieurs dispositifs 1 d'aération par décharge brusque d'air comprimé sont montés sur la paroi même du récipient 100.FIG. 1 shows a container or container 100, such as a hopper, filled with pulverulent or granular products 101. It is desirable that such a hopper 100 is static and not equipped with a vibrator in order to avoid settling of the product 101 which must flow by gravity and escape through the lower opening 103. In order to destroy the vaults, bridges, chimneys which naturally tend to form by the agglomeration of particles of product 101. in particular in the vicinity of the walls of lower slope such as 104, one or more devices 1 for aeration by sudden discharge of compressed air are mounted on the same wall of the container 100.

Chaque dispositif d'aération 1 comprend essentiellement un réservoir 10 de stockage d'air comprimé, prolongé par un conduit d'échappement 9 muni d'un dispositif d'accouplement, par exemple à bride 91, pour faciliter le montage du dispositif 1 sur le récipient 100. Le conduit d'échappement 9 ou un conduit associé, se prolonge jusqu'à l'intérieur du récipient 100. Du côté du réservoir 10 opposé au conduit d'échappement 9, un ensemble 8 contrôle l'arrivée d'air comprimé dans le réservoir proprement dit 10 à partir d'une canalisation 7 reliée par l'intermédiaire d'une vanne à trois voies 6 à un réseau normal 4 d'alimentation en air comprimé, par exemple à une pression comprise entre environ 4 et 16 bars. La vanne 6 commande le remplissage du réservoir 10 par la mise en communication de la canalisation 7 avec le réseau 4 d'alimentation en air comprimé, et le vidage du réservoir 10 par la mise en communication de la canalisation 7 avec l'échappement 5. Lors de la mise à l'échappement de la canalisation 7, l'ensemble 8 du dispositif d'aération 1 provoque automatiquement la décharge immédiate de l'air comprimé contenu dans le réservoir 10, par le conduit 9 pour produire une onde de choc 102 à l'intérieur du récipient 100.Each aeration device 1 essentially comprises a reservoir 10 for storing compressed air, extended by an exhaust duct 9 provided with a coupling device, for example with a flange 91, to facilitate mounting of the device 1 on the container 100. The exhaust duct 9 or an associated duct extends to the interior of the container 100. On the side of the reservoir 10 opposite the exhaust duct 9, an assembly 8 controls the arrival of compressed air in the tank proper 10 from a pipe 7 connected via a three-way valve 6 to a normal network 4 for supplying compressed air, for example at a pressure between about 4 and 16 bars . The valve 6 controls the filling of the tank 10 by putting the pipe 7 into communication with the compressed air supply network 4, and the emptying of the tank 10 by putting the pipe 7 into communication with the exhaust 5. When the pipe 7 is exhausted, the assembly 8 of the aeration device 1 automatically causes the immediate discharge of the compressed air contained in the reservoir 10, through the conduit 9 to produce a shock wave 102 inside container 100.

La structure même du dispositif 1 sera maintenant décrite de façon détaillée en référence à la figure 2. Un réservoir 10, dont la contenance est fonction des applications envisagées et peut être par exemple comprise entre environ 10 et 150 litres, mais peut également atteindre des valeurs très supérieures, est formé par exemple à partir de deux calottes 11, 12 en tôle d'acier soudées de façon étanche pour constituer une enceinte résistant à la pression. L'une des extrémités du réservoir 10, par exemple la calotte 11 est traversée par un conduit d'échappement 9 dont la section est très sensiblement inférieure à la section de réservoir 10. Le conduit axial 9 qui émerge à l'extérieur du réservoir 10 est fixé de façon étanche, par exemple par soudage, à la calotte 11 et se prolonge par une portion 90 sur la majeure partie de la longueur du réservoir 10. Comme on peut le voir sur la figure 2, la calotte 12 peut être munie d'une ouverture 13 de diamètre supérieur au diamètre du conduit 90 et une partie 14 peut être rapportée sur la calotte 12, autour de l'ouverture 13. Dans ce cas, la partie de conduit 90 peut se rapporter au-delà de la surface définie par la simple calotte 12 et se terminer au voisinage de l'extrémité de la partie rapportée 14. L'extrémité 92 du conduit 90 est prévue pour constituer un siège de soupape destiné à coopérer avec un clapet 2 solidaire d'une membrane 22 disposée transversalement par rapport au tronçon de conduit 90. La membrane 22 flexible qui peut être par exemple en caoutchouc est fixée par sa périphérie sur l'extrémité 14 du réservoir 10. La membrane 22 ferme de façon étanche la partie 14 à l'exception de un ou plusieurs petits orifices calibrés 26 ménagés dans la membrane dans sa partie en forme de couronne disposée entre l'extrémité interne du conduit 92 du conduit 90 et la partie de la paroi 14 du réservoir 10.The very structure of the device 1 will now be described in detail with reference to FIG. 2. A tank 10, the capacity of which depends on the applications envisaged and can for example be between approximately 10 and 150 liters, but can also reach values very superior, is formed for example from two caps 11, 12 sheet steel welded tightly to form a pressure-resistant enclosure. One of the ends of the tank 10, for example the cap 11, is crossed by an exhaust duct 9 whose section is very substantially smaller than the tank section 10. The axial duct 9 which emerges outside the tank 10 is tightly fixed, for example by welding, to the cap 11 and is extended by a portion 90 over the major part of the length of the reservoir 10. As can be seen in FIG. 2, the cap 12 can be provided with an opening 13 with a diameter greater than the diameter of the conduit 90 and a portion 14 can be attached to the cap 12, around the opening 13. In this case, the portion of the conduit 90 can relate beyond the defined surface by the simple cap 12 and ending in the vicinity of the end of the attached part 14. The end 92 of the conduit 90 is designed to constitute a valve seat intended to cooperate with a valve 2 integral with a membrane 22 arranged transversely relative to the pipe section t 90. The flexible membrane 22 which may for example be made of rubber is fixed by its periphery to the end 14 of the reservoir 10. The membrane 22 sealingly closes the part 14 with the exception of one or more small calibrated orifices 26 formed in the membrane in its crown-shaped part disposed between the internal end of the conduit 92 of the conduit 90 and the part of the wall 14 of the reservoir 10.

Une pièce rapportée 8 munie d'un orifice d'admission 81 est fixée de façon amovible sur la partir d'extrémité 14 du réservoir 10 par des moyens de liaison tels que des boulons 83,84 engagés dans des orifices 82. La pièce de fond amovible 8 vient notamment serrer la partie périphérique de la membrane 22 sur la partie 14. Un petit espace libre est ménagé entre la paroi interne de la pièce de fond 8 et l'extrémité 92 du tronçon de conduit 90 de manière à permettre un certain débattement de la membrane 22 portant le clapet 2 entre l'extrémité 92 de conduit axial d'échappement et la paroi interne 30 de la pièce de fond 8. Un orifice axial d'admission 81 est formé dans la pièce de fond 8 et est prévu pour être raccordé à une canalisation 7. La paroi interne 30 de la pièce de fond 8 peut être par exemple de forme tronconique et délimite avec la membrane 2 une chambre 31 qui est mise en communication avec la canalisation 7 par l'orifice d'admission 81 et avec l'intérieur du réservoir 10 par des orifices calibrés 26.An insert 8 provided with an inlet orifice 81 is removably attached to the end portion 14 of the reservoir 10 by connecting means such as bolts 83, 84 engaged in orifices 82. The bottom part removable 8 especially clamps the peripheral part of the membrane 22 on the part 14. A small free space is provided between the internal wall of the bottom part 8 and the end 92 of the section of conduit 90 so as to allow a certain clearance of the membrane 22 carrying the valve 2 between the end 92 of the axial exhaust duct and the internal wall 30 of the bottom part 8. An axial inlet orifice 81 is formed in the bottom part 8 and is intended to be connected to a pipe 7. The internal wall 30 of the bottom part 8 can be for example of frustoconical shape and delimits with the membrane 2 a chamber 31 which is placed in communication with the pipe 7 by the inlet port 81 and with the interior of the tank 10 by calibrated ports 26.

La membrane 22 peut être montée en sandwich entre deux plaques 21,23 coopérant respectivement avec l'extrémité 92 du tronçon de conduit 90 et une portée 85 de la paroi interne 30 de la pièce de fond 8. La portée 85 constitue un siège de clapet pour la plaque 23 autour de l'orifice d'admission 81. Les plaques 21,23 sont assemblées à la membrane 22 de façon étanche, à l'aide d'un moyen d'assemblage tel que 24. Un ressort 25 peut coopérer avec le clapet 21,22,23 pour ajuster la raideur de la membrane 22.The membrane 22 can be sandwiched between two plates 21, 23 cooperating respectively with the end 92 of the duct section 90 and a bearing 85 of the internal wall 30 of the bottom part 8. The bearing 85 constitutes a valve seat for the plate 23 around the inlet orifice 81. The plates 21, 23 are assembled to the membrane 22 in a leaktight manner, using an assembly means such as 24. A spring 25 can cooperate with the valve 21, 22, 23 for adjusting the stiffness of the membrane 22.

Le fonctionnement du dispositif sera maintenant décrit en référence aux figures 2 à 4.The operation of the device will now be described with reference to FIGS. 2 to 4.

Dans un premier temps, la vanne 6, qui est une vanne ou électrovanne classique à 3/2 voies, met en communication la canalisation 7 avec la source 4 d'alimentation en air comprimé. L'air comprimé pénètre par l'orifice d'admission 81 de la pièce de fond 8 dans la chambre 31 et repousse la membrane 22 qui plaque le clapet 21 contre l'extrémité 92 du tronçon de conduit 90 fermant ainsi l'ouverture de ce dernier. L'air comprimé passe alors de la chambre 31 à l'intérieur du réservoir 10, sauf le conduit 90, par les orifices 26 de la membrane 22. L'intérieur du conduit 90 étant à la pression atmosphérique, l'ensemble 2 reste plaqué contre l'extrémité 92 du conduit 90 pendant tout le temps du remplissage du réservoir 10 par l'air comprimé.Firstly, the valve 6, which is a conventional 3/2 way valve or solenoid valve, puts the pipe 7 in communication with the source 4 of compressed air supply. The compressed air enters through the inlet orifice 81 of the bottom part 8 into the chamber 31 and pushes the membrane 22 which presses the valve 21 against the end 92 of the section conduit 90 thus closing the opening of the latter. The compressed air then passes from the chamber 31 inside the tank 10, except the conduit 90, through the orifices 26 of the membrane 22. The interior of the conduit 90 being at atmospheric pressure, the assembly 2 remains plated against the end 92 of the conduit 90 during the entire time of filling of the reservoir 10 with compressed air.

Lorsque l'opération de recharge du réservoir 10 est terminée, cest-à-dire lorsque tout l'intérieur du réservoir 10, sauf le conduit 90, est rempli d'air comprimé, le dispositif qui reste en communication avec l'alimentation en air comprimé est prêt à fonctionner. La décharge brusque de l'air comprimé par le conduit d'échappement 9 est alors provoqué par la simple manoeuvre de l'électrovanne 6 qui est mise à l'échappement (figure 4). L'air comprimé encore présent dans la petite chambre 31 et la canalisation 7 est alors évacué instantanément par l'échappement 5 de la vanne 6, provoquant un mouvement de la membrane 22 sous l'action de la pression emmagasinée dans le réservoir 10 et amenant la fermeture de l'orifice d'admission 81 par la plaque 23. L'extrémité 92 du conduit d'échappement 90 est alors dégagée et l'air comprimé emmagasiné dans le réservoir 10 s'échappe brusquement par ce conduit 9 vers l'intérieur de l'enceinte sur laquelle est monté le dispositif.When the recharging operation of the reservoir 10 is complete, that is to say when the entire interior of the reservoir 10, except the conduit 90, is filled with compressed air, the device which remains in communication with the air supply tablet is ready to use. The sudden discharge of compressed air through the exhaust pipe 9 is then caused by the simple operation of the solenoid valve 6 which is exhausted (Figure 4). The compressed air still present in the small chamber 31 and the pipe 7 is then evacuated instantaneously by the exhaust 5 of the valve 6, causing a movement of the membrane 22 under the action of the pressure stored in the tank 10 and bringing the closure of the intake orifice 81 by the plate 23. The end 92 of the exhaust duct 90 is then released and the compressed air stored in the tank 10 suddenly escapes through this duct 9 inwards of the enclosure on which the device is mounted.

Le réservoir 10 une fois vidé, le cycle peut recommencer et la recharge du réservoir 10 s'effectue comme indiqué précédemment par mise en communication de la canalisation 7 avec l'alimentation 4 en air comprimé par la vanne 6.Once the tank 10 has been emptied, the cycle can start again and the tank 10 is recharged as indicated above by placing the pipe 7 in communication with the compressed air supply 4 by the valve 6.

Le dispositif selon l'invention est particulièrement remarquable par le fait que l'alimentation en air comprimé est opérée axialement à partir de l'orifice d'entrée 81, de même que la décharge par le tube axial 9. L'arrivée et le départ en ligne de l'air comprimé contribuent à assurer un fonctionnement aisé et sûr du système, d'autant plus que le seul ensemble mobile est constitué par la membrane 22 qui avec ses éléments associés est de faible masse et présente un débattement limité.The device according to the invention is particularly remarkable in that the power supply in compressed air is operated axially from the inlet orifice 81, as is the discharge through the axial tube 9. The arrival and departure in line of the compressed air contribute to ensuring easy and safe operation of the system, especially since the only mobile assembly is constituted by the membrane 22 which with its associated elements is of low mass and has a limited clearance.

Enfin, le dispositif selon l'invention est particulièrement compact car les moyens de valve constitués par l'ensemble 2 formant clapet et la partie de fond 8 présentent un encombrement limité dans le sens axial.Finally, the device according to the invention is particularly compact because the valve means constituted by the assembly 2 forming a valve and the bottom part 8 have a limited bulk in the axial direction.

Claims (4)

1. Dispositif d'aération par décharge brusque d'air comprimé, notamment pour faciliter l'écoulement de matières stockées, du type comprenant un réservoir (10) de stockage d'air comprimé muni d'un orifice d'entrée (81) susceptible d'être relié à une source (4) d'alimentation en air comprimé par l'intermédiaire d'une vanne (6) à trois voies, une conduite (9) de décharge de l'air comprimé stocké, laquelle conduite s'étend sensiblement sur toute la longueur du réservoir (10) et se prolonge à l'extérieur du réservoir pour déboucher dans une enceinte (100) à aérer, et des moyens de valve (2) pour d'une part, dans un premier temps, mettre en communication l'intérieur du réservoir (10), sauf ladite conduite (9) avec l'orifice (81) d'alimentation en air comprimé, et d'autre part, dans un deuxième temps obturer l'orifice d'entrée (81) et mettre en communication l'intérieur du réservoir (10) avec ladite conduite de décharge (9), l'orifice d'entrée (81) relié à la source d'alimentation en air comprimé étant disposé dans l'axe de ladite conduite de décharge (9), à distance de l'extrémité interne (92) de cette dernière qui constitue un siège de soupape,
caractérisé en ce que les moyens de valve (2) comprennent au moins une membrane flexible (22) interposée entre l'extrémité interne (92) de la conduite de décharge et ledit orifice d'entrée (81), et capable de réaliser alternativement l'obturation de la seule extrémité interne (92) de la conduite de décharge lorsque la pression de l'air comprimé de la source d'alimentation est appliquée sur l'orifice d'entrée (81), et l'obturation du seul orifice d'entrée (81) lorsque la pression de l'air comprimé de la source d'alimentation (4) n'est plus exercée sur celui-ci, et
en ce que ladite membrane (22) est disposée sensiblement perpendiculairement à l'axe de la conduite d'échappement (9) et de l'orifice d'entrée (81) et présente au moins une perforation (26) dans sa partie située entre l'extrémité interne de la conduite d'échappement et la partie (14) formant paroi extérieure du réservoir de stockage d'air comprimé.1. Aeration device by sudden discharge of compressed air, in particular to facilitate the flow of stored materials, of the type comprising a reservoir (10) for storing compressed air provided with an inlet orifice (81) capable of to be connected to a source (4) of compressed air supply via a three-way valve (6), a pipe (9) for discharging the stored compressed air, which pipe extends substantially over the entire length of the tank (10) and extends outside the tank to open into an enclosure (100) to be aerated, and valve means (2) for firstly, putting in communication inside the tank (10), except said line (9) with the orifice (81) for supplying compressed air, and on the other hand, in a second step shut off the inlet orifice (81 ) and to put in communication the interior of the tank (10) with said discharge line (9), the inlet orifice (81) connected to the source of supply of compressed air rhymed being disposed in the axis of said discharge line (9), at a distance from the internal end (92) of the latter which constitutes a valve seat,
characterized in that the valve means (2) comprise at least one flexible membrane (22) interposed between the internal end (92) of the discharge line and said inlet port (81), and capable of alternately producing the closing the only internal end (92) of the discharge line when the pressure of the compressed air from the power source is applied to the inlet port (81), and closing the only port d 'inlet (81) when the pressure of the compressed air from the supply source (4) is no longer exerted on it, and
in that said membrane (22) is arranged sensitive ment perpendicular to the axis of the exhaust pipe (9) and the inlet orifice (81) and has at least one perforation (26) in its part located between the internal end of the exhaust pipe and the part (14) forming the outer wall of the compressed air storage tank. 2. Dispositif d'aération selon la revendication 1, caractérisé en ce que l'orifice d'entrée (81) est formé dans une pièce démontable (8) rapportée à l'extrémité du réservoir de stockage qui est voisine de l'extrémité interne (92) de la conduite d'échappement (9) et présente une ouverture (13) de section supérieure à la section de la conduite d'échappement (9), et en ce que la partie périphérique de la membrane (22) des moyens de valve (2) est fixée entre l'extrémité du réservoir de stockage et ladite pièce démontable rapportée (8).2. Aeration device according to claim 1, characterized in that the inlet orifice (81) is formed in a removable part (8) attached to the end of the storage tank which is close to the internal end (92) of the exhaust pipe (9) and has an opening (13) of section greater than the section of the exhaust pipe (9), and in that the peripheral part of the membrane (22) means valve (2) is fixed between the end of the storage tank and said removable removable part (8). 3. Dispositif d'aération selon la revendication 2, caractérisé en ce que ladite pièce démontable d'extrémité rapportée présente une paroi interne (30) de forme sensiblement tronconique.3. Aeration device according to claim 2, characterized in that said removable end-piece attached has an internal wall (30) of substantially frustoconical shape. 4. Dispositif d'aération selon l'une des revendications 1 à 3, caractérisé en ce que la partie centrale de la membrane (22) formant clapet est serrée entre deux plaques rigides (21,23) coopérant respectivement avec l'extrémité interne de la conduite d'échappement et le contour de l'orifice d'entrée formant sièges de soupape.4. Aeration device according to one of claims 1 to 3, characterized in that the central part of the membrane (22) forming a valve is clamped between two rigid plates (21,23) cooperating respectively with the internal end of the exhaust pipe and the contour of the inlet orifice forming valve seats.
EP19800400904 1979-06-19 1980-06-19 Device for aeration by sudden discharge of compressed air Expired EP0021999B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7915704A FR2459188A1 (en) 1979-06-19 1979-06-19 APPARATUS FOR AEROSPACE BY COMPRESSED AIR INJECTION
FR7915704 1979-06-19

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EP0021999A1 true EP0021999A1 (en) 1981-01-07
EP0021999B1 EP0021999B1 (en) 1983-04-27

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DE (1) DE3062887D1 (en)
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2518668A1 (en) * 1981-12-23 1983-06-24 Agrichema Materialflusstechnik APPARATUS FOR AIR PULSES, PARTICULARLY FOR STORAGE AND TRANSPORT FACILITIES OF BULK PRODUCTS
EP0097236A1 (en) * 1982-06-23 1984-01-04 VSR Engineering GmbH Fördertechnik Blowing device for removing banks in silos for bulk material
US4449644A (en) * 1981-06-18 1984-05-22 Ludlow Industries, Inc. Blast aerator for fluidizing granular material
FR2547639A1 (en) * 1983-06-15 1984-12-21 Simoens Herve SUPPLY VALVE PISTON OF A CAPACITY AND THEN A BRUTAL DISCHARGE OF THIS CAPACITY AND A BRUTAL DISCHARGE VALVE PROVIDED WITH THIS PISTON
AU580414B2 (en) * 1985-05-24 1989-01-12 Technisch Bureau Knol B.V. Air cannon
US4817821A (en) * 1985-10-31 1989-04-04 Simoens Herve H J Valve for pressurizing a compressed gas accumulator and for the sudden discharge of gas from the accumulator
US5853160A (en) * 1997-12-23 1998-12-29 Martin Engineering Company Aerator valve assembly
EP0881417A3 (en) * 1997-05-30 1999-01-20 Martin Engineering Company Aerator valve assembly
EP1279622A1 (en) * 2001-07-23 2003-01-29 Kanekita Co., Ltd. Air pulser and devices utilizing the same
US7273205B2 (en) 2004-01-14 2007-09-25 Martin Engineering Company Positive pressure actuated aerator valve assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104828896A (en) * 2015-05-15 2015-08-12 浙江沐源环境工程有限公司 Sealed active carbon powder feeding device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2214651A1 (en) * 1973-01-22 1974-08-19 Martin Eng Co

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2214651A1 (en) * 1973-01-22 1974-08-19 Martin Eng Co

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4449644A (en) * 1981-06-18 1984-05-22 Ludlow Industries, Inc. Blast aerator for fluidizing granular material
FR2518668A1 (en) * 1981-12-23 1983-06-24 Agrichema Materialflusstechnik APPARATUS FOR AIR PULSES, PARTICULARLY FOR STORAGE AND TRANSPORT FACILITIES OF BULK PRODUCTS
EP0097236A1 (en) * 1982-06-23 1984-01-04 VSR Engineering GmbH Fördertechnik Blowing device for removing banks in silos for bulk material
FR2547639A1 (en) * 1983-06-15 1984-12-21 Simoens Herve SUPPLY VALVE PISTON OF A CAPACITY AND THEN A BRUTAL DISCHARGE OF THIS CAPACITY AND A BRUTAL DISCHARGE VALVE PROVIDED WITH THIS PISTON
EP0134726A1 (en) * 1983-06-15 1985-03-20 Standard Industrie S.A. Quick discharge valve actuated by a piston
US4579138A (en) * 1983-06-15 1986-04-01 Herve Simoens Piston and valve arrangement
AU580414B2 (en) * 1985-05-24 1989-01-12 Technisch Bureau Knol B.V. Air cannon
US4817821A (en) * 1985-10-31 1989-04-04 Simoens Herve H J Valve for pressurizing a compressed gas accumulator and for the sudden discharge of gas from the accumulator
EP0881417A3 (en) * 1997-05-30 1999-01-20 Martin Engineering Company Aerator valve assembly
AU732749B2 (en) * 1997-05-30 2001-04-26 Martin Engineering Company Aerator valve assembly
US5853160A (en) * 1997-12-23 1998-12-29 Martin Engineering Company Aerator valve assembly
EP1279622A1 (en) * 2001-07-23 2003-01-29 Kanekita Co., Ltd. Air pulser and devices utilizing the same
US6755114B2 (en) 2001-07-23 2004-06-29 Kanekita Co., Ltd. Air pulser and devices
US7273205B2 (en) 2004-01-14 2007-09-25 Martin Engineering Company Positive pressure actuated aerator valve assembly

Also Published As

Publication number Publication date
DE3062887D1 (en) 1983-06-01
FR2459188A1 (en) 1981-01-09
FR2459188B1 (en) 1983-05-06
EP0021999B1 (en) 1983-04-27

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