[go: up one dir, main page]

EP0042771A1 - Method to regulate the pulse amplitude in a pneumatic jig - Google Patents

Method to regulate the pulse amplitude in a pneumatic jig Download PDF

Info

Publication number
EP0042771A1
EP0042771A1 EP81400798A EP81400798A EP0042771A1 EP 0042771 A1 EP0042771 A1 EP 0042771A1 EP 81400798 A EP81400798 A EP 81400798A EP 81400798 A EP81400798 A EP 81400798A EP 0042771 A1 EP0042771 A1 EP 0042771A1
Authority
EP
European Patent Office
Prior art keywords
leak
air
pneumatic piston
chamber
leakage
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
EP81400798A
Other languages
German (de)
French (fr)
Other versions
EP0042771B1 (en
Inventor
Jean-Luc Lambert
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.)
Fives Cail Babcock SA
Original Assignee
Fives Cail Babcock 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 Fives Cail Babcock SA filed Critical Fives Cail Babcock SA
Publication of EP0042771A1 publication Critical patent/EP0042771A1/en
Application granted granted Critical
Publication of EP0042771B1 publication Critical patent/EP0042771B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/02—Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation
    • B03B5/10—Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation on jigs
    • B03B5/24—Constructional details of jigs, e.g. pulse control devices

Definitions

  • the present invention relates to the separation by densimetric classification in a liquid medium of grain products of different densities in a plunger tank where the liquid is subjected to pulsations pneumatically controlled by admission of compressed air into a chamber communicating with the separation chamber, the bottom consists of a grid immersed in the liquid.
  • the products to be classified are separated into two superimposed layers, a lower layer composed mainly of high density products, and an upper layer composed of low density products. It then becomes easy to discharge the products of the two aforementioned layers separately.
  • the invention relates more particularly to the regulation of the amplitude of the pulsation in a pneumatic piston plunger of this kind.
  • Such regulation is essential to properly evacuate heavy products depending on the quantity of said products to be evacuated. It is therefore necessary to increase the amplitude of the pulsation when the quantity of heavy products increases, causing the level of separation of the layers to rise, and to decrease the amplitude of the pulsation otherwise.
  • a known solution consists in using a probe capable of detecting the level of separation of the two layers of products and in controlling the degree of throttling of an air leakage member.
  • the main object of the invention is to avoid the drawbacks inherent in known containers.
  • the invention more specifically relates to a method of regulation of the amplitude of the pulsation in a pneumatic piston vat where products to be classified are separated into two superimposed layers, characterized in that, on the one hand, the level of separation of the layers is detected by means of a probe emitting a measurement signal, and in that, on the other hand, an intermittent air leak is caused by means of a leak member, the start of the leak being controlled after the complete opening of the member d air intake in the tank, the end of the leak being controlled at the same time as the closing of said air intake member, and the duration of the leak being determined by the signal emitted by the probe, said signal being directed to a computing unit which receives information sent by a unit for storing the program for opening and closing the intake member and which delivers a control signal from the leak member.
  • a pneumatic piston tray for implementing the method comprising a pulsation chamber filled with liquid, said pulsation chamber communicating with a separation chamber, the bottom of which consists of a grid immersed in the liquid. , an air chamber in relation to the pulsation chamber, a member for admitting compressed air into said air chamber, and an element for exhausting air from said air chamber, characterized in that it furthermore comprises an intermittent operation leakage member which is connected to the air chamber, a probe capable of detecting the level of separation of the layers and of transmitting a measurement signal, a unit for storing the opening program and closing the admission unit which delivers information representative of said program, and a calculation unit which receives the information delivered by the storage unit and the signal emitted by the probe and which delivers a control signal from the leakage device.
  • the leakage member is constituted by a valve provided for this sole purpose, preferably an electro-valve.
  • the leakage member consists of the air exhaust member.
  • the latter is advantageously produced in the form of a valve, preferably of the butterfly valve type.
  • the plunger tank is divided into two adjacent compartments each having its pulsation chamber, its separation chamber and its air chamber.
  • a single compressed air intake member is then provided for the two compartments, to each of which are assigned a particular probe and a specific leak member, the two probes and the two leak members being connected to a computing unit. to which is also connected a storage unit which is also unique.
  • the leakage device relating to each compartment is constituted by a valve provided for this sole purpose, preferably an electro-valve.
  • the leakage member relating to each compartment is constituted by the particular air exhaust member of said compartment.
  • Said air exhaust member is advantageously produced in the form of a valve, preferably of the butterfly valve type.
  • Figure 1 shows, in cross section, a simple tray made according to a first form of the invention.
  • Figure 2 is a diagram illustrating the operation from this bin.
  • Figure 3 shows, in cross section, a simple tray made according to a second form of the invention.
  • Figure 4 is a diagram illustrating the operation of this tank.
  • FIG. 5 represents, in cross section, a compartmentalized container produced according to a third form of the invention.
  • Figure 6 is a diagram illustrating the operation of this tank.
  • FIG. 7 shows, in cross section, a compartmentalized container produced according to a fourth form of the invention.
  • Figure 8 is a diagram illustrating the operation of this tank.
  • the reference numeral 1 designates the pulsation chamber of the pneumatic piston plunger for the separation of grain products of different densities.
  • Chamber 1 is supplied with water by a tube 2. Inside chamber 1, the water is subjected to pulsations pneumatically controlled by admission of compressed air.
  • an air chamber 3 is arranged through the chamber 1. Said air chamber, open over its entire length at its lower part, is thus placed in communication with the pulsation chamber 1.
  • the chamber 3 is compressed from a feeder 4, via a pipe 5 on which is mounted an inlet member, such as a butterfly valve 6. Said butterfly valve is controlled to ensure cyclically the opening and closing of the passage established by the piping 5 between the feeder 4 and the air chamber 3.
  • the exhaust of air from the chamber 3 is ensured, towards a pressure reduction pot 7, by the intermediate a pipe 8 on which is mounted an exhaust member, such as a butterfly valve 9.
  • Said butterfly valve is controlled to cyclically ensure the opening and closing of the passage established by the pipe 8 between the air chamber 3 and the trigger pot 7.
  • the pulsations are transmitted to the water contained in a separation chamber 10 situated above the pulsation chamber 1, said chambers communicating with each other.
  • the bottom of the chamber 10 is constituted by a grid 11 in the form of a perforated table, which is immersed in water.
  • the products are separated under the effect of pulsations, into two superimposed layers.
  • the products of the lower layer, of high density are evacuated by the tube 13 which is provided for the lower part of chamber 1, while the products of the upper layer, of low density, are evacuated with water, by overflowing of the latter out of chamber 10.
  • the reference numeral 14 designates a valve, more precisely a solenoid valve, mounted on a tube 15 putting the air chamber 3 into communication with an expansion pot 16.
  • the solenoid valve 14 constitutes a leak member operating intermittently in conditions which will be explained below.
  • the reference 17 designates a probe capable of detecting the level of separation of the two layers of the bed 12 and of transmitting a measurement signal representative of said level.
  • the reference 18 designates a unit for storing the program for opening and closing the butterfly valve 6. Said unit delivers in the form of a signal information representative of said program.
  • the signals delivered by the probe 17 and by the unit 18 are sent to a calculation unit 19, which delivers a control signal from the solenoid valve 14.
  • Units 18 and 19 are designed so that the start of the leak (opening of the solenoid valve 14) is com ordered after the complete opening of the butterfly valve 6, that the end of the leak (closing of the solenoid valve 14) is controlled at the same time as the closing of said butterfly valve, and that the duration of the leak is determined by the signal emitted by the probe 17.
  • FIG. 2 illustrates, in the form of a diagram, the opening and closing cycles which we have just described.
  • the operating cycles of the butterfly valve 6, of the butterfly valve 9 and of the solenoid valve 14 are shown from top to bottom.
  • the opening of the butterfly valve 6 is controlled at time t 1 , complete opening is carried out at time t 2 and closing is ordered at time t 4 .
  • the opening of the solenoid valve 14 is controlled at time t 3 , after time t 2 and before time t 4 where the closing of the solenoid valve 14 is controlled at the same time as that of the butterfly valve 6.
  • the instants t 1 and t 4 are fixed instants provided by the program stored in the unit 18, while the instant t 3 , depending on the signal emitted by the probe 17, is variable.
  • the leak is controlled for only part of the duration (t 4 - t 2 ) of the full admission of the compressed air, more precisely at the end of said admission.
  • the opening and closing of the butterfly valve 9 are, of course, controlled after the instant t 4 , before a new opening of the butterfly valve 6.
  • FIG. 3 the same references have been used as in FIG. 1 to designate the identical or equivalent elements and we will only describe below the differently arranged elements.
  • the manifold 4, the piping 5 and the butterfly valve 6 are arranged on one side of the tank, while the expansion pot 7, the piping 8 and the butterfly valve 9 are arranged on the opposite side.
  • the signal delivered by the calculation unit 19 here controls the opening and closing of the butterfly valve 9 which constitutes both the leakage organ and the organ exhaust. This signal is received by any conventional device, not shown, capable of controlling the operation of said butterfly valve.
  • FIG. 4 illustrates, in diagram form, the opening and closing cycles of the butterfly valves 6 and 9 represented respectively by the upper and lower traces.
  • the instants t 1 , t 2 , t 3 and t 4 have the same meaning here as in the case of FIG. 2. It goes without saying that the opening and closing of the butterfly valve 9 operating as a member d 'air exhaust, are ordered again, after time t 4' before a new opening of the butterfly valve 6.
  • FIG. 5 there is shown a piston container divided into two adjacent compartments by a longitudinal partition 20. Each of these compartments constitutes a container similar to that shown in Figure 1.
  • the entire container is distinguished from a classic double tray, because the two compartments are associated with common elements.
  • These elements are designated by the same references as those used in Figure 1; in particular the marks 4, 5, 6, 7, 8 and 9.
  • the same marks have also been used as in FIG. 1 to designate the particular elements of each compartment, these marks however being assigned the "prime" index for the compartment on the left of the figure, and the index "second" for the compartment on the right of the figure.
  • a single unit 18 is provided for storing the programs relating to each compartment, and a calculation unit 19, also unique.
  • Figure 6 illustrates, in diagram form, the different opening and closing cycles.
  • the operating cycles of the butterfly valve 6, the butterfly valve 9, the solenoid valve 14 'and the solenoid valve 14 " This diagram differs from that of FIG. 2 by the only fact that two leakage members are provided, the opening of these members 14 ′ and 14 ′′ being respectively controlled at times t ′ and t ′′ 3. These two variable times are not necessarily the same, since the signals emitted by the feelers 17 'and 17 "are not necessarily the same.
  • FIG. 7 there is shown a piston container divided into two adjacent compartments by a longitudinal partition 20. Each of these compartments constitutes a container similar to that shown in Figure 3. The entire container is distinguished from a classic double tray, because the two compartments are associated with common elements. To identify the different elements represented, the same conventions have been adopted as those used with reference to FIG. 5.
  • the units 18 and 19 are identical to those of FIG. 5 but the unit 19 delivers two signals, one for controlling the butterfly valve 9 ', the other for controlling the butterfly valve 9 ".
  • Figure 8 illustrates, in diagram form, the different opening and closing cycles.
  • the operating cycles of the butterfly valve 6, the butterfly valve 9 'and the butterfly valve 9 "have been shown from top to bottom.
  • This diagram differs from that of FIG. 4 by the simple fact that two leak are planned, the open ture of these members 9 'and 9 "being respectively controlled at times t' and t" 3 .
  • these two variable instants are not necessarily the same. We find here the same advantage as that highlighted with reference to the description of FIG. 6.
  • each single tray or each compartmented tray into a plurality of cells.
  • Each cell of a single bin or each pair of cells opposite a compartmentalized bin is then arranged in accordance with the preceding description.
  • the duration of the opening of the leakage organ is controlled by the signal emitted by the corresponding probe, so that the pulsation decreases in intensity when the quantity of heavy products decreases, or more precisely falls below a setpoint.
  • the invention therefore covers, in addition to the examples shown, their different variants of execution.

Landscapes

  • Reciprocating Pumps (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Characterised By The Charging Evacuation (AREA)

Abstract

L'invention concerne un bac à pistonnage pneumatique pour la séparation par classement densimétrique en milieu liquide de produits en grains de densités différentes. En vue d'effectuer la régulation de l'amplitude de la pulsation, on détecte le niveau de séparation des couches de produits au moyen d'un palpeur (17) émettant un signal de mesure, et l'on provoque une fuite d'air intermittente au moyen d'un organe de fuite (14), le début de la fuite étant commandé après l'ouverture complète de l'organe (6) d'admission d'air dans le bac, la fin de la fuite étant commandée en même temps que la fermeture dudit organe d'admission, et la durée de la fuite étant déterminée par le signal émis par le palpeur (17), ledit signal étant dirigé vers une unité de calcul (19) qui reçoit une information émise par une unité de mise en mémoire (18) du programme d'ouverture et de fermeture de l'organe d'admission (6) et qui délivre un signal de commande de l'organe de fuite (14).The invention relates to a pneumatic piston tray for separation by densimetric classification in liquid medium of grain products of different densities. In order to regulate the amplitude of the pulsation, the level of separation of the layers of products is detected by means of a probe (17) emitting a measurement signal, and an air leak is caused. intermittent by means of a leak member (14), the start of the leak being controlled after the complete opening of the member (6) for admitting air into the tank, the end of the leak being controlled by at the same time as the closing of said admission member, and the duration of the leak being determined by the signal emitted by the probe (17), said signal being directed to a computing unit (19) which receives information emitted by a unit for memorizing (18) the program for opening and closing the intake member (6) and which delivers a command signal from the leak member (14).

Description

La présente invention concerne la séparation par classement densimétrique en milieu liquide de produits en grains de densités différentes dans un bac à pistonnage où le liquide est soumis à des pulsations commandées pneumatiquement par admission d'air comprimé dans une chambre communiquant avec la chambre de séparation dont le fond est constitué par une grille immergée dans le liquide. Dans le lit se trouvant au-dessus de la grille, les produits à classer sont séparés en deux couches superposées, une couche inférieure composée principalement de produits de densité élevée, et une couche supérieure composée de produits de faible densité. Il devient alors facile d'évacuer séparément les produits des deux couches précitées.The present invention relates to the separation by densimetric classification in a liquid medium of grain products of different densities in a plunger tank where the liquid is subjected to pulsations pneumatically controlled by admission of compressed air into a chamber communicating with the separation chamber, the bottom consists of a grid immersed in the liquid. In the bed above the grid, the products to be classified are separated into two superimposed layers, a lower layer composed mainly of high density products, and an upper layer composed of low density products. It then becomes easy to discharge the products of the two aforementioned layers separately.

L'invention concerne plus particulièrement la régulation de l'amplitude de la pulsation dans un bac à pistonnage pneumatique de ce genre.The invention relates more particularly to the regulation of the amplitude of the pulsation in a pneumatic piston plunger of this kind.

Une telle régulation est indispensable pour assurer convenablement l'évacuation des produits lourds en fonction de la quantité desdits produits à évacuer. Il convient alors d'augmenter l'amplitude de la pulsation lorsque la quantité de produits lourds augmente, en provoquant la montée du niveau de séparation des couches, et de diminuer l'amplitude de la pulsation dans le cas contraire.Such regulation is essential to properly evacuate heavy products depending on the quantity of said products to be evacuated. It is therefore necessary to increase the amplitude of the pulsation when the quantity of heavy products increases, causing the level of separation of the layers to rise, and to decrease the amplitude of the pulsation otherwise.

Une solution connue consiste à faire appel à un palpeur apte à détecter le niveau de séparation des deux couches de produits et à commander le degré d'étranglement d'un organe de fuite d'air.A known solution consists in using a probe capable of detecting the level of separation of the two layers of products and in controlling the degree of throttling of an air leakage member.

Cette solution présente l'inconvénient de donner lieu à une fuite permanente, de débit instantané variable, pendant toute la durée de l'admission de l'air comprimé. Le bac fonctionne alors dans de mauvaises conditions étant donné que l'effet de choc résultant de l'ouverture rapide de l'organe d'admission de l'air comprimé est considérablement atténué.This solution has the drawback of giving rise to a permanent leak, of variable instantaneous flow, throughout the duration of the admission of the compressed air. Baccalaureat then operates in poor conditions since the shock effect resulting from the rapid opening of the compressed air intake member is considerably attenuated.

Un autre inconvénient de cette solution réside dans le fait qu'elle est inapplicable aux bacs de grandes largeurs avec lesquels les couches de produits ne sauraient-présenter une épaisseur uniforme.Another drawback of this solution lies in the fact that it is inapplicable to large width tanks with which the product layers cannot have a uniform thickness.

Pour remédier à ce dernier inconvénient, on a déjà pensé à diviser un bac de pistonnage en deux compartiments distincts adjacents et à associer un palpeur à chaque compartiment. Cette disposition dite "à bac double" ne permet pas d'éliminer le premier inconvénient susmentionné, et par ailleurs, n'offre pas la possibilité d'assurer une régulation différente de part et d'autre de la cloison de séparation des deux compartiments, à moins de traiter les deux compartiments comme deux bacs totalement indépendants l'un de l'autre. Cette disposition est donc absolument inapplicable lorsque les deux compartiments du bac sont alimentés en air comprimé par un organe d'admission unique.To overcome this last drawback, it has already been thought of dividing a plunger tank into two adjacent separate compartments and of associating a probe with each compartment. This so-called "double bin" arrangement does not eliminate the first aforementioned drawback, and moreover, does not offer the possibility of ensuring different regulation on either side of the partition dividing the two compartments, unless you treat the two compartments as two completely independent from one another. This provision is therefore absolutely inapplicable when the two compartments of the tank are supplied with compressed air by a single intake member.

L'invention a surtout pour but d'éviter les inconvénients inhérents aux bacs connus.The main object of the invention is to avoid the drawbacks inherent in known containers.

Elle consiste, afin de bénéficier intégralement de l'effet de choc, à assurer une fuite d'air à débit instantané constant, pendant une partie seulement de la durée de l'admission de l'air comprimé, plus précisément en fin d'admission.It consists, in order to fully benefit from the shock effect, to ensure an air leak at constant instantaneous flow, during only part of the duration of the admission of the compressed air, more precisely at the end of admission .

Elle consiste en outre, dans le cas d'un bac à deux compartiments alimentés en air comprimé par un même: organe d'admission, à assurer une régulation différente suivant les besoins dans chacun desdits compartiments.It also consists, in the case of a tank with two compartments supplied with compressed air by the same: inlet member, to ensure different regulation according to the needs in each of said compartments.

L'invention a plus précisément pour objet un procédé de régulation de l'amplitude de la pulsation dans un bac à pistonnage pneumatique où des produits à classer sont séparés en deux couches superposées, caractérisé en ce que, d'une part, on détecte le niveau de séparation des couches au moyen d'un palpeur émettant un signal de mesure, et en ce que, d'autre part, on provoque une fuite d'air intermittente au moyen d'un organe de fuite, le début de la fuite étant commandé après l'ouverture complète de l'organe d'admission d'air dans le bac, la fin de la fuite étant commandée en même temps que la fermeture dudit organe d'admission d'air, et la durée de la fuite étant déterminée par le signal émis par le palpeur, ledit signal étant dirigé vers une unité de calcul qui reçoit une information émise par une unité de mise en mémoire du programme d'ouverture et de fermeture de l'organe d'admission et qui délivre un signal de commande de l'organe de fuite.The invention more specifically relates to a method of regulation of the amplitude of the pulsation in a pneumatic piston vat where products to be classified are separated into two superimposed layers, characterized in that, on the one hand, the level of separation of the layers is detected by means of a probe emitting a measurement signal, and in that, on the other hand, an intermittent air leak is caused by means of a leak member, the start of the leak being controlled after the complete opening of the member d air intake in the tank, the end of the leak being controlled at the same time as the closing of said air intake member, and the duration of the leak being determined by the signal emitted by the probe, said signal being directed to a computing unit which receives information sent by a unit for storing the program for opening and closing the intake member and which delivers a control signal from the leak member.

L'invention a également pour objet un bac à pistonnage pneumatique pour la mise en oeuvre du procédé comprenant une chambre de pulsation remplie de liquide, ladite chambre de pulsation communiquant avec une chambre de séparation dont le fond est constitué par une grille immergée dans le liquide, une chambre à air en relation avec la chambre de pulsation, un organe d'admission d'air comprimé dans ladite chambre à air, et un organe d'échappement d'air hors de ladite chambre à air, caractérisé en ce qu'il comprend, en outre un organe de fuite à fonctionnement intermittent qui est raccordé à la chambre à air, un palpeur apte à détecter le niveau de séparation des couches et à émettre un signal de mesure, une unité de mise en mémoire du programme d'ouverture et de fermeture de l'organe d'admission qui délivre une information représentative dudit programme, et une unité de calcul qui reçoit l'information délivrée par l'unité de mise en mémoire et le signal émis par le palpeur et qui délivre un signal de commande de l'organe de fuite.Another subject of the invention is a pneumatic piston tray for implementing the method comprising a pulsation chamber filled with liquid, said pulsation chamber communicating with a separation chamber, the bottom of which consists of a grid immersed in the liquid. , an air chamber in relation to the pulsation chamber, a member for admitting compressed air into said air chamber, and an element for exhausting air from said air chamber, characterized in that it furthermore comprises an intermittent operation leakage member which is connected to the air chamber, a probe capable of detecting the level of separation of the layers and of transmitting a measurement signal, a unit for storing the opening program and closing the admission unit which delivers information representative of said program, and a calculation unit which receives the information delivered by the storage unit and the signal emitted by the probe and which delivers a control signal from the leakage device.

L'organe de fuite est constitué par une vanne prévue à ce seul effet, de préférence une électro-vanne.The leakage member is constituted by a valve provided for this sole purpose, preferably an electro-valve.

En variante, l'organe de fuite est constitué par l'organe d'échappement d'air. Ce dernier est avantageusement réalisé sous la forme d'une vanne, de préférence du type vanne papillon.As a variant, the leakage member consists of the air exhaust member. The latter is advantageously produced in the form of a valve, preferably of the butterfly valve type.

Suivant une forme particulière de réalisation, le bac à pistonnage est divisé en deux compartiments adjacents possédant chacun sa chambre de pulsation, sa chambre de séparation et sa chambre à air. Il est alors prévu un organe d'admission d'air comprimé unique pour les deux compartiments, à chacun desquels sont affectés un palpeur particulier et un organe de fuite particulier, les deux palpeurs et les deux organes de fuite étant reliés à une unité de calcul unique à laquelle est reliée une unité'de mise en mémoire également unique.According to a particular embodiment, the plunger tank is divided into two adjacent compartments each having its pulsation chamber, its separation chamber and its air chamber. A single compressed air intake member is then provided for the two compartments, to each of which are assigned a particular probe and a specific leak member, the two probes and the two leak members being connected to a computing unit. to which is also connected a storage unit which is also unique.

Il est prévu, en outre, soit un organe d'échappement d'air unique pour les deux compartiments, soit un organe d'échappement d'air particulier pour chaque compartiment.There is also provided either a single air exhaust member for the two compartments, or a specific air exhaust member for each compartment.

L'organe de fuite afférent à chaque compartiment est constitué par une vanne prévue à ce seul effet, de préférence une électro-vanne.The leakage device relating to each compartment is constituted by a valve provided for this sole purpose, preferably an electro-valve.

En variante, l'organe de fuite afférent à chaque compartiment est constitué par l'organe d'échappement d'air particulier dudit compartiment. Le dit organe d'échappement d'air est avantageusement réalisé sous la forme d'une vanne, de préférence du type vanne papillon.Alternatively, the leakage member relating to each compartment is constituted by the particular air exhaust member of said compartment. Said air exhaust member is advantageously produced in the form of a valve, preferably of the butterfly valve type.

L'invention sera mieux comprise en se référant à la description qui suit, faite en regard des dessins annexés, concernant différentes formes de réalisation de l'invention données à titre d'exemples non limitatifs.The invention will be better understood by referring to the description which follows, given with reference to the appended drawings, relating to various embodiments of the invention given by way of nonlimiting examples.

La figure 1 représente, en coupe transversale, un bac simple réalisé suivant une première forme de l'invention. La figure 2 est un diagramme illustrant le fonctionnement de ce bac. La figure 3 représente, en coupe transversale, un bac simple réalisé suivant une deuxième forme de l'invention. La figure 4 est un diagramme illustrant le fonctionnement de ce bac. La figure 5 représente, en coupe transversale, un bac compartimenté réalisé suivant une troisième forme de l'invention. La figure 6 est un diagramme illustrant le fonctionnement de ce bac. La figure 7 représente, en coupe transversale, un bac compartimenté réalisé suivant une quatrième forme de l'invention. La figure 8 est un diagramme illustrant le fonctionnement de ce bac.Figure 1 shows, in cross section, a simple tray made according to a first form of the invention. Figure 2 is a diagram illustrating the operation from this bin. Figure 3 shows, in cross section, a simple tray made according to a second form of the invention. Figure 4 is a diagram illustrating the operation of this tank. FIG. 5 represents, in cross section, a compartmentalized container produced according to a third form of the invention. Figure 6 is a diagram illustrating the operation of this tank. FIG. 7 shows, in cross section, a compartmentalized container produced according to a fourth form of the invention. Figure 8 is a diagram illustrating the operation of this tank.

Sur la figure 1, le repère 1 désigne la chambre de pulsation du bac à pistonnage pneumatique pour la séparation de produits en grains de densités différentes. La chambre 1 est alimentée en eau par une tubulure 2. A l'intérieur de la chambre 1, l'eau est soumise à des pulsations commandées pneumatiquement par admission d'air comprimé. A cet effet, une chambre à air 3 est aménagée au travers de la chambre 1. Ladite chambre à air, ouverte sur toute sa longueur à sa partie inférieure, est ainsi mise en communication avec la chambre de pulsation 1. L'alimentation en air comprimé de la chambre 3 est assurée, à partir d'une nourrice 4, par l'intermédiaire d'une tuyauterie 5 sur laquelle est monté un organe d'admission, tel qu'une vanne papillon 6. Ladite vanne papillon est commandée pour assurer cycliquement l'ouverture et la fermeture du passage établi par la tuyauterie 5 entre la nourrice 4 et la chambre à air 3. L'échappement de l'air hors de la chambre 3 est assuré, vers un pot de détente 7, par l'intermédiaire d'une tuyauterie 8 sur laquelle est monté un organe d'échappement, tel qu'une vanne papillon 9. Ladite vanne papillon est commandée pour assurer cycliquement l'ouverture et la fermeture du passage établi par la tuyauterie 8 entre la chambre à air 3 et le pot de détente 7.In FIG. 1, the reference numeral 1 designates the pulsation chamber of the pneumatic piston plunger for the separation of grain products of different densities. Chamber 1 is supplied with water by a tube 2. Inside chamber 1, the water is subjected to pulsations pneumatically controlled by admission of compressed air. To this end, an air chamber 3 is arranged through the chamber 1. Said air chamber, open over its entire length at its lower part, is thus placed in communication with the pulsation chamber 1. The air supply The chamber 3 is compressed from a feeder 4, via a pipe 5 on which is mounted an inlet member, such as a butterfly valve 6. Said butterfly valve is controlled to ensure cyclically the opening and closing of the passage established by the piping 5 between the feeder 4 and the air chamber 3. The exhaust of air from the chamber 3 is ensured, towards a pressure reduction pot 7, by the intermediate a pipe 8 on which is mounted an exhaust member, such as a butterfly valve 9. Said butterfly valve is controlled to cyclically ensure the opening and closing of the passage established by the pipe 8 between the air chamber 3 and the trigger pot 7.

Les pulsations se transmettent à l'eau contenue dans une chambre de séparation 10 située au-dessus de la chambre de pulsation 1, lesdites chambres communiquant entre elles.The pulsations are transmitted to the water contained in a separation chamber 10 situated above the pulsation chamber 1, said chambers communicating with each other.

Le fond de la chambre 10 est constitué par une grille 11 en forme de table perforée, qui est immergée dans l'eau. Dans le lit 12 situé au-dessus de la grille 11, les produits sont séparés sous l'effet des pulsations, en deux couches superposées.Les produits de la couche inférieure, de densité élevée, sont évacués par la tubulure 13 qui est prévue à la partie inférieure de la chambre 1, tandis que les produits de la couche supérieure, de faible densité, sont évacués avec l'eau, par débordement de celle-ci hors de la chambre 10.The bottom of the chamber 10 is constituted by a grid 11 in the form of a perforated table, which is immersed in water. In the bed 12 located above the grid 11, the products are separated under the effect of pulsations, into two superimposed layers. The products of the lower layer, of high density, are evacuated by the tube 13 which is provided for the lower part of chamber 1, while the products of the upper layer, of low density, are evacuated with water, by overflowing of the latter out of chamber 10.

La description qui précède concerne des dispositions relatives à un bac de pistonnage connu. On va maintenant décrire les.dispositions caractéristiques de l'invention, à savoir les moyens de régulation de l'amplitude de la pulsation.The foregoing description relates to provisions relating to a known plunger tank. We will now describe the characteristic features of the invention, namely the means for regulating the amplitude of the pulsation.

Le repère 14 désigne une vanne, plus précisément une électro-vanne, montée sur une tubulure 15 mettant en communication la chambre à air 3 avec un pot de détente 16. L'électro-vanne 14 constitue un organe de fuite fonctionnant de façon intermittente dans des conditions qui seront explicitées plus loin.The reference numeral 14 designates a valve, more precisely a solenoid valve, mounted on a tube 15 putting the air chamber 3 into communication with an expansion pot 16. The solenoid valve 14 constitutes a leak member operating intermittently in conditions which will be explained below.

Le repère 17 désigne un palpeur apte à détecter le niveau de séparation des deux couches du lit 12 et à émettre un signal de mesure représentatif dudit niveau.The reference 17 designates a probe capable of detecting the level of separation of the two layers of the bed 12 and of transmitting a measurement signal representative of said level.

Le repère 18 désigne une unité de mise en mémoire du programme d'ouverture et de fermeture de la vanne papillon 6. Ladite unité délivre sous la forme d'un signal une information représentative dudit programme.The reference 18 designates a unit for storing the program for opening and closing the butterfly valve 6. Said unit delivers in the form of a signal information representative of said program.

Les signaux délivrés par le palpeur 17 et par l'unité 18 sont dirigés sur une unité de calcul 19, laquelle délivre un signal de commande de l'électro-vanne 14.The signals delivered by the probe 17 and by the unit 18 are sent to a calculation unit 19, which delivers a control signal from the solenoid valve 14.

Les unités 18 et 19 sont prévues de telle sorte que le début de la fuite (ouverture de l'électro-vanne 14) soit commandé après l'ouverture complète de la vanne papillon 6, que la fin de la fuite (fermeture de l'électro-vanne 14) soit commandée en même temps que la fermeture de ladite vanne papillon, et que la durée de la fuite soit déterminée par le signal émis par le palpeur 17.Units 18 and 19 are designed so that the start of the leak (opening of the solenoid valve 14) is com ordered after the complete opening of the butterfly valve 6, that the end of the leak (closing of the solenoid valve 14) is controlled at the same time as the closing of said butterfly valve, and that the duration of the leak is determined by the signal emitted by the probe 17.

La figure 2 illustre, sous forme de diagramme, les cycles d'ouverture et de fermeture que l'on vient d'exposer. On a représenté, de haut en bas, les cycles de fonctionnement de la vanne papillon 6, de la vanne papillon 9 et de l'électro-vanne 14. L'ouverture de la vanne papillon 6 est commandée à l'instant t1, l'ouverture complète est réalisée à l'instant t2 et la fermeture est commandée à l'instant t4. L'ouverture de l'électro-vanne 14 est commandée à l'instant t3, postérieurement à l'instant t2 et antérieurement à l'instant t4 où la fermeture de l'électrovanne 14 est commandée en même temps que celle de la vanne papillon 6. Les instants t1 et t4 sont des instants fixes prévus par le programme mis en mémoire dans l'unité 18, tandis que l'instant t3, dépendant du signal émis par le palpeur 17, est variable. De toute façon, la fuite est commandée pendant une partie seulement de la durée (t4 - t2) de la pleine admission de l'air comprimé, plus précisément en fin de ladite admission. L'ouverture et la fermeture de la vanne papillon 9 sont, bien entendu, commandés postérieurement à l'instant t4, avant une nouvelle ouverture de la vanne papillon 6.FIG. 2 illustrates, in the form of a diagram, the opening and closing cycles which we have just described. The operating cycles of the butterfly valve 6, of the butterfly valve 9 and of the solenoid valve 14 are shown from top to bottom. The opening of the butterfly valve 6 is controlled at time t 1 , complete opening is carried out at time t 2 and closing is ordered at time t 4 . The opening of the solenoid valve 14 is controlled at time t 3 , after time t 2 and before time t 4 where the closing of the solenoid valve 14 is controlled at the same time as that of the butterfly valve 6. The instants t 1 and t 4 are fixed instants provided by the program stored in the unit 18, while the instant t 3 , depending on the signal emitted by the probe 17, is variable. In any case, the leak is controlled for only part of the duration (t 4 - t 2 ) of the full admission of the compressed air, more precisely at the end of said admission. The opening and closing of the butterfly valve 9 are, of course, controlled after the instant t 4 , before a new opening of the butterfly valve 6.

Sur la figure 3, on a utilisé les mêmes repères que sur la figure 1 pour désigner les éléments identiques ou équivalents et on ne décrira ci-après que les éléments différemment agencés.In FIG. 3, the same references have been used as in FIG. 1 to designate the identical or equivalent elements and we will only describe below the differently arranged elements.

La nourrice 4, la tuyauterie 5 et la vanne papillon 6 sont aménagées sur un côté du bac, tandis que le pot de détente 7, la tuyauterie 8 et la vanne papillon 9 sont aménagés sur le côté opposé. Le signal délivré par l'unité de calcul 19 commande ici l'ouverture et la fermeture de la vanne papillon 9 qui constitue à la fois l'organe de fuite et l'organe d'échappement. Ce signal est reçu par tout dispositif usuel, non représenté, apte à commander le fonctionnement de ladite vanne papillon.The manifold 4, the piping 5 and the butterfly valve 6 are arranged on one side of the tank, while the expansion pot 7, the piping 8 and the butterfly valve 9 are arranged on the opposite side. The signal delivered by the calculation unit 19 here controls the opening and closing of the butterfly valve 9 which constitutes both the leakage organ and the organ exhaust. This signal is received by any conventional device, not shown, capable of controlling the operation of said butterfly valve.

La figure 4 illustre, sous forme de diagramme, les cycles d'ouverture et de fermeture des vannes papillons 6 et 9 représentés respectivement par les tracés supérieur et inférieur. Les instants t1, t2, t3 et t4 ont ici la même signification que dans le cas de la figure 2. Il va de soi que l'ouverture et la fermeture de la vanne papillon 9 fonctionnant en tant qu'organe d'échappement d'air, sont commandées une nouvelle fois, postérieurement à l'instant t4' avant une nouvelle ouverture de la vanne papillon 6.FIG. 4 illustrates, in diagram form, the opening and closing cycles of the butterfly valves 6 and 9 represented respectively by the upper and lower traces. The instants t 1 , t 2 , t 3 and t 4 have the same meaning here as in the case of FIG. 2. It goes without saying that the opening and closing of the butterfly valve 9 operating as a member d 'air exhaust, are ordered again, after time t 4' before a new opening of the butterfly valve 6.

Sur la figure 5, on a représenté un bac à pistonnage divisé en deux compartiments adjacents par une cloison longitudinale 20. Chacun de ces compartiments constitue un bac analogue à celui représenté sur la figure 1. L'ensemble du bac se distingue toutefois d'un bac double classique, du fait que les deux compartiments sont associés à des éléments communs. Ces éléments sont désignés par les mêmes repères que ceux utilisés sur la figure 1 ; notamment les repères 4, 5, 6, 7, 8 et 9. On a également utilisé les mêmes repères que sur la figure 1 pour désigner les éléments particuliers de chaque compartiment, ces repères étant toutefois affectés de l'indice "prime" pour le compartiment situé à gauche de la figure, et de l'indice "seconde" pour le compartiment situé à droite de la figure.In Figure 5, there is shown a piston container divided into two adjacent compartments by a longitudinal partition 20. Each of these compartments constitutes a container similar to that shown in Figure 1. The entire container is distinguished from a classic double tray, because the two compartments are associated with common elements. These elements are designated by the same references as those used in Figure 1; in particular the marks 4, 5, 6, 7, 8 and 9. The same marks have also been used as in FIG. 1 to designate the particular elements of each compartment, these marks however being assigned the "prime" index for the compartment on the left of the figure, and the index "second" for the compartment on the right of the figure.

Il est prévu une unité 18 unique pour la mise en mémoire des programmes afférents à chaque compartiment, et une unité de calcul 19, également unique. Les signaux émis par les palpeurs 17' et 17" sont reçus par l'unité 18 qui délivre deux signaux, l'un pour commander l'électro-vanne 14', l'autre pour commander l'électro-vanne 14".A single unit 18 is provided for storing the programs relating to each compartment, and a calculation unit 19, also unique. The signals emitted by the probes 17 'and 17 "are received by the unit 18 which delivers two signals, one for controlling the solenoid valve 14", the other for controlling the solenoid valve 14 ".

La figure 6 illustre, sous forme de diagramme, les différents cycles d'ouverture et de fermeture. On a représenté de haut en bas, les cycles de fonctionnement de la vanne papillon 6, de la vanne papillon 9, de l'électrovanne 14' et de l'électrovanne 14". Ce diagramme diffère de celui de la figure 2 par le seul fait que deux organes de fuite sont prévus, l'ouverture de ces organes 14' et 14" étant respectivement commandée aux instants t' et t"3. Ces deux instants variables ne sont pas nécessairement les mêmes, étant donné que les signaux émis par les palpeurs 17' et 17" ne sont pas nécessairement identiques. Cela illustre la possibilité de réaliser une régulation différente de l'amplitude de la pulsation de part et d'autre de la cloison 20. Cette possibilité se révèle particulièrement avantageuse dans le cas du bac compartimenté avec admission d'air comprimé unique, du fait qu'il serait impossible, dans ce cas, de parvenir à ce résultat en assurant une telle régulation en agissant sur l'admission d'air comprimé.Figure 6 illustrates, in diagram form, the different opening and closing cycles. We represented from top to bottom, the operating cycles of the butterfly valve 6, the butterfly valve 9, the solenoid valve 14 'and the solenoid valve 14 ". This diagram differs from that of FIG. 2 by the only fact that two leakage members are provided, the opening of these members 14 ′ and 14 ″ being respectively controlled at times t ′ and t ″ 3. These two variable times are not necessarily the same, since the signals emitted by the feelers 17 'and 17 "are not necessarily the same. This illustrates the possibility of carrying out a different regulation of the amplitude of the pulsation on either side of the partition 20. This possibility proves to be particularly advantageous in the case of the compartmentalized tank with single compressed air intake, because 'It would be impossible, in this case, to achieve this result by ensuring such regulation by acting on the intake of compressed air.

Sur la figure 7, on a représenté un bac à pistonnage divisé en deux compartiments adjacents par une cloison longitudinale 20. Chacun de ces compartiments constitue un bac analogue à celui représenté sur la figure 3. L'ensemble du bac se distingue toutefois d'un bac double classique, du fait que les deux compartiments sont associés à des éléments communs. Pour repérer les différents éléments représentés on a adopté les mêmes conventions que celles utilisées en référence à la figure 5.In Figure 7, there is shown a piston container divided into two adjacent compartments by a longitudinal partition 20. Each of these compartments constitutes a container similar to that shown in Figure 3. The entire container is distinguished from a classic double tray, because the two compartments are associated with common elements. To identify the different elements represented, the same conventions have been adopted as those used with reference to FIG. 5.

Les unités 18 et 19 sont identiques à celles de la figure 5 mais l'unité 19 délivre deux signaux, l'un pour commander la vanne papillon 9', l'autre pour commander la vanne papillon 9".The units 18 and 19 are identical to those of FIG. 5 but the unit 19 delivers two signals, one for controlling the butterfly valve 9 ', the other for controlling the butterfly valve 9 ".

La figure 8 illustre, sous forme de diagramme les différents cycles d'ouverture et de fermeture. On a représenté, de haut en bas, les cycles de fonctionnement de la vanne papillon 6, de la vanne papillon 9' et de la vanne papillon 9". Ce diagramme diffère de celui de la figure 4 par le seul fait que deux organes de fuite sont prévus, l'ouverture de ces organes 9' et 9" étant respectivement commandée aux instants t' et t"3. Comme dans le cas de la figure 6, ces deux instants variables ne sont pas nécessairement les mêmes. On retrouve ici le même avantage que celui mis en évidence en référence à la description de la figure 6.Figure 8 illustrates, in diagram form, the different opening and closing cycles. The operating cycles of the butterfly valve 6, the butterfly valve 9 'and the butterfly valve 9 "have been shown from top to bottom. This diagram differs from that of FIG. 4 by the simple fact that two leak are planned, the open ture of these members 9 'and 9 "being respectively controlled at times t' and t" 3 . As in the case of FIG. 6, these two variable instants are not necessarily the same. We find here the same advantage as that highlighted with reference to the description of FIG. 6.

Quelle que soit la forme de réalisation, il est possible de diviser longitudinalement chaque bac simple ou chaque bac compartimenté en une pluralité de cellules. Chaque cellule d'un bac simple ou chaque paire de cellules en regard d'un bac compartimenté est alors aménagée conformément à la description qui précède.Whatever the embodiment, it is possible to divide longitudinally each single tray or each compartmented tray into a plurality of cells. Each cell of a single bin or each pair of cells opposite a compartmentalized bin is then arranged in accordance with the preceding description.

Quelle que soit la forme de réalisation, il est indispensable de prévoir des mesures propres à éviter un déficit d'air, un tel déficit interviendrait dans le cas où, en raison du débit de fuite, la quantité d'air à l'échappement serait supérieure à la quantité d'air comprimé admise. Le fonctionnement du bac serait alors perturbé. On peut éviter cet inconvénient, soit en agissant sur la durée de l'échappement, soit en prévoyant sur l'échappement une soupape de détente.Whatever the embodiment, it is essential to provide measures to avoid an air deficit, such a deficit would occur in the event that, due to the leakage rate, the quantity of air in the exhaust would be greater than the quantity of compressed air allowed. The operation of the tank would then be disturbed. This disadvantage can be avoided, either by acting on the duration of the exhaust, or by providing an expansion valve on the exhaust.

De toute façon, on asservit la durée d'ouverture de l'organe de fuite au signal émis par le palpeur correspondant, de telle sorte que la pulsation diminue d'intensité lorsque la quantité de produits lourds diminue, ou plus précisément tombe au-dessous d'une valeur de consigne.In any case, the duration of the opening of the leakage organ is controlled by the signal emitted by the corresponding probe, so that the pulsation decreases in intensity when the quantity of heavy products decreases, or more precisely falls below a setpoint.

Bien que l'invention ait été décrite en référence à des formes particulières de réalisation, il va de soi qu'elle ne leur est en rien limitée et que des modifications peuvent y être apportées sans sortir de son domaine.Although the invention has been described with reference to particular embodiments, it goes without saying that it is in no way limited to them and that modifications can be made thereto without departing from its field.

On pourra, bien entendu, remplacer l'un quelconque des moyens décrits par un moyen techniquement équivalent.We can, of course, replace any of the means described by a technically equivalent means.

L'invention couvre donc, outre les exemples représentés, leurs différentes variantes d'exécution.The invention therefore covers, in addition to the examples shown, their different variants of execution.

Claims (11)

1. Procédé de régulation de l'amplitude de la pulsation dans un bac à pistonnage pneumatique où des produits à classer sont séparés en deux couches superposées, caractérisé en ce que, d'une part, on détecte le niveau de séparation des couches au moyen d'un palpeur (17) émettant un signal de mesure, et en ce que, d'autre part, on provoque une fuite d'air intermittente au moyen d'un organe de fuite, le début de la fuite étant commandé après l'ouverture complète de l'organe (6) d'admission d'air dans le bac, la fin de la fuite étant commandée en même temps que la fermeture dudit organe d'admission d'air, et la durée de la fuite étant déterminée par le signal émis par le palpeur (17), ledit signal étant dirigé vers une unité de calcul (19) qui reçoit une information émise par une unité de mise en mémoire (18) du programme d'ouverture et de fermeture de l'organe d'admission (6) et qui délivre un signal de commande de l'organe de fuite.1. Method for regulating the amplitude of the pulsation in a pneumatic piston container where products to be classified are separated into two superposed layers, characterized in that, on the one hand, the level of separation of the layers is detected by means of a probe (17) transmitting a measurement signal, and in that, on the other hand, an intermittent air leak is caused by means of a leak member, the start of the leak being controlled after the complete opening of the air intake member (6) into the tank, the end of the leak being controlled at the same time as the closing of said air intake member, and the duration of the leak being determined by the signal emitted by the probe (17), said signal being directed to a computing unit (19) which receives information emitted by a storage unit (18) of the program for opening and closing the organ d intake (6) which delivers a control signal from the leakage device. 2. Bac à pistonnage pneumatique pour la mise en oeuvre du procédé suivant la revendication 1, comprenant une chambre de pulsation (1) remplie de liquide, ladite chambre de pulsation communiquant avec une chambre de séparation (10) dont le fond est constitué par une grille (11) immergée dans le liquide, une chambre à air (3) en relation avec la chambre de pulsation (1), un organe (6) d'admission d'air comprimé dans ladite chambre à air, et un organe (9) d'échappement d'air hors de ladite chambre à air, caractérisé en ce qu'il comprend, en outre un organe de fuite à fonctionnement intermittent qui est raccordé à la chambre à air (3), un palpeur (17) apte à détecter le niveau de séparation des couches et à émettre un signal de mesure, une unité de mise en mémoire (18) du programme d'ouverture et de fermeture de l'organe d'admission (6) qui délivre une information représentative dudit programme, et une unité de calcul (19) qui reçoit l'information délivrée par l'unité de mise en mémoire (18) et le signal émis par le palpeur (17) et qui délivre un signal de commande de l'organe de fuite.2. Pneumatic piston plunger for implementing the method according to claim 1, comprising a pulsation chamber (1) filled with liquid, said pulsation chamber communicating with a separation chamber (10) the bottom of which consists of a grid (11) immersed in the liquid, an air chamber (3) in relation to the pulsation chamber (1), a member (6) for admitting compressed air into said air chamber, and a member (9 ) air exhaust from said air chamber, characterized in that it further comprises an intermittent leakage member which is connected to the air chamber (3), a feeler (17) capable of detecting the level of separation of the layers and transmitting a measurement signal, a unit for storing (18) the program for opening and closing the admission member (6) which delivers information representative of said program, and a calculation unit (19) which receives the information delivered by the storage unit (1 8) and the signal emitted by the probe (17) and which delivers a control signal from the leakage device. 3. Bac à pistonnage pneumatique suivant la revendication 2, caractérisé en ce que l'organe de fuite est constitué par une vanne (14) prévue à ce seul effet.3. Pneumatic piston tray according to claim 2, characterized in that the leakage member is constituted by a valve (14) provided for this sole purpose. 4. Bac à pistonnage pneumatique suivant la revendication 2, caractérisé en ce que l'organe de fuite est constitué par l'organe (9) d'échappement d'air.4. Pneumatic piston tray according to claim 2, characterized in that the leakage member is constituted by the member (9) for air exhaust. 5. Bac à pistonnage pneumatique suivant la revendication 4, caractérisé en ce que l'organe (9) d'échappement d'air est constitué par une vanne.5. Pneumatic piston container according to claim 4, characterized in that the air exhaust member (9) is constituted by a valve. 6. Bac à pistonnage pneumatique suivant la revendication 2, divisé. en deux compartiments adjacents possédant chacun sa chambre de pulsation (1', 1"), sa chambre de séparation (10', 10") et sa chambre à air (3', 3"), caractérisé en ce qu'il est prévu un organe (6) d'admission d'air comprimé unique pour les deux compartiments à chacun desquels sont affectés un palpeur particulier (17', 17") et un organe de fuite particulier, les deux palpeurs et les deux organes de fuite étant reliés à une unité de calcul unique (19) à laquelle est reliée une unité de mise en mémoire (18) également unique.6. Pneumatic piston tray according to claim 2, divided. in two adjacent compartments each having its pulsation chamber (1 ', 1 "), its separation chamber (10', 10") and its air chamber (3 ', 3 "), characterized in that it is provided a single compressed air intake member (6) for the two compartments to each of which are assigned a particular probe (17 ′, 17 ") and a particular leakage member, the two feelers and the two leakage members being connected to a single calculation unit (19) to which is connected a storage unit (18) also unique. 7. Bac à pistonnage pneumatique suivant la revendication 6, caractérisé en ce qu'il est prévu, en outre, un organe (9) d'échappement d'air unique pour les deux compartiments.7. Pneumatic piston tray according to claim 6, characterized in that there is further provided a single air exhaust member (9) for the two compartments. 8. Bac à pistonnage pneumatique suivant la revendication 6, caractérisé en ce qu'il est prévu, en outre, un organe d'échappement d'air particulier (9', 9") pour chaque compartiment.8. Pneumatic piston tray according to claim 6, characterized in that there is further provided a specific air exhaust member (9 ', 9 ") for each compartment. 9. Bac à pistonnage pneumatique suivant l'une des revendications 6 à 8, caractérisé en ce que l'organe de fuite afférent à chaque compartiment est constitué par une vanne (14', 14") prévue à ce seul effet.9. Pneumatic piston tub according to one of claims 6 to 8, characterized in that the leakage member relating to each compartment is constituted by a valve (14 ′, 14 ") provided for this purpose only. 10. Bac à pistonnage pneumatique suivant la revendication 8, caractérisé en ce que l'organe de fuite afférent à chaque compartiment est constitué par l'organe (9', 9") d'échappement d'air dudit compartiment.10. A pneumatic piston tray according to claim 8, characterized in that the leakage member relating to each compartment is constituted by the member (9 ', 9 ") for air exhaust from said compartment. 11. Bac à pistonnage pneumatique suivant la revendication 10, caractérisé en ce que l'organe (9', 9") d'échappement d'air afférent à chaque compartiment est constitué par une vanne.11. Pneumatic piston tray according to claim 10, characterized in that the air exhaust member (9 ', 9 ") relating to each compartment is constituted by a valve.
EP81400798A 1980-06-25 1981-05-21 Method to regulate the pulse amplitude in a pneumatic jig Expired EP0042771B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8014080 1980-06-25
FR8014080A FR2485397A1 (en) 1980-06-25 1980-06-25 METHOD FOR REGULATING THE AMPLITUDE OF PULSATION IN A PNEUMATIC PICK-UP BIN, AND PISTONING BAGS USING SAID METHOD

Publications (2)

Publication Number Publication Date
EP0042771A1 true EP0042771A1 (en) 1981-12-30
EP0042771B1 EP0042771B1 (en) 1984-12-05

Family

ID=9243491

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81400798A Expired EP0042771B1 (en) 1980-06-25 1981-05-21 Method to regulate the pulse amplitude in a pneumatic jig

Country Status (7)

Country Link
US (1) US4342654A (en)
EP (1) EP0042771B1 (en)
CA (1) CA1174750A (en)
DE (1) DE3167568D1 (en)
FR (1) FR2485397A1 (en)
IN (1) IN152606B (en)
ZA (1) ZA814069B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997009116A1 (en) * 1995-09-08 1997-03-13 The University Of Queensland Dynamic monitoring and control of jigs

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3150999C2 (en) * 1981-12-23 1985-06-20 Klöckner-Humboldt-Deutz AG, 5000 Köln Wet setting machine for processing coal or other minerals
US4586091A (en) * 1984-05-03 1986-04-29 Kalhas Oracle, Inc. System and method for high density data recording
CA1311218C (en) * 1986-06-27 1992-12-08 University Of Queensland Control of jig separators
US4902429A (en) * 1988-06-20 1990-02-20 Redux Corporation Gas assisted flotation process
US5055184A (en) * 1988-06-20 1991-10-08 Redux Corporation Gas assisted flotation apparatus
JPH03258341A (en) * 1990-03-06 1991-11-18 Konica Corp Method of removing organic solvent
US5128068A (en) * 1990-05-25 1992-07-07 Westinghouse Electric Corp. Method and apparatus for cleaning contaminated particulate material
US5268128A (en) * 1990-05-25 1993-12-07 Westinghouse Electric Corp. Method and apparatus for cleaning contaminated particulate material
US5541831A (en) * 1993-04-16 1996-07-30 Oliver Manufacturing Co., Inc. Computer controlled separator device
CN111889220B (en) * 2020-07-13 2022-03-18 唐山开远科技有限公司 Stepped jigger

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE467117A (en) *
GB425704A (en) * 1933-10-21 1935-03-20 Arthur Algernon Hirst Improvements in or relating to washer boxes for treating coal or other granular substances
FR946173A (en) * 1947-04-23 1949-05-25 Prep Ind Combustibles Device for producing and regulating the pulsation of a liquid in a receptacle topped with a grid
US2846071A (en) * 1956-04-26 1958-08-05 Link Belt Co Washing jig
FR1465130A (en) * 1966-01-21 1967-01-06 Westfalia Dinnendahl Washing machine for the preparation of coal or other mineral materials
DE2539374A1 (en) * 1975-09-04 1977-03-10 Kloeckner Humboldt Deutz Ag Coal beneficiation by pneumatically controlled jig - has layer thickness sensor controlling heavy material discharge volume and pulsation intensity
US4019981A (en) * 1973-10-20 1977-04-26 Klockner-Humboldt-Deutz Aktiengesellschaft Method and apparatus for the preparation of mineral mixtures on a jig controlled by compressed air
FR2407748A1 (en) * 1977-11-04 1979-06-01 Fives Cail Babcock Granular material classifier control - uses level difference to regulate pulsation of piston acting on liq. carrier medium
DE2823148A1 (en) * 1978-05-26 1979-11-29 Kloeckner Humboldt Deutz Ag AUTOMATIC CONTROL PROCESS FOR ELECTRIC-PNEUMATIC WETTENING MACHINE FOR SEPARATION OF MINERAL MIXTURES, IN PARTICULAR COAL

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1515865A (en) * 1966-06-14 1968-03-08 Saint Gobain Techn Nouvelles Improvements in the separation of a liquid and an immiscible solid or liquid in suspension
US3822015A (en) * 1970-02-04 1974-07-02 Battelle Development Corp Separation of solids by varying the bulk density of a fluid separating medium
US4120783A (en) * 1977-07-05 1978-10-17 Baummer George P Apparatus and process for ordinary and submarine mineral beneficiation
US4226714A (en) * 1978-12-27 1980-10-07 The Anaconda Company Thickener control system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE467117A (en) *
GB425704A (en) * 1933-10-21 1935-03-20 Arthur Algernon Hirst Improvements in or relating to washer boxes for treating coal or other granular substances
FR946173A (en) * 1947-04-23 1949-05-25 Prep Ind Combustibles Device for producing and regulating the pulsation of a liquid in a receptacle topped with a grid
US2846071A (en) * 1956-04-26 1958-08-05 Link Belt Co Washing jig
FR1465130A (en) * 1966-01-21 1967-01-06 Westfalia Dinnendahl Washing machine for the preparation of coal or other mineral materials
US4019981A (en) * 1973-10-20 1977-04-26 Klockner-Humboldt-Deutz Aktiengesellschaft Method and apparatus for the preparation of mineral mixtures on a jig controlled by compressed air
DE2539374A1 (en) * 1975-09-04 1977-03-10 Kloeckner Humboldt Deutz Ag Coal beneficiation by pneumatically controlled jig - has layer thickness sensor controlling heavy material discharge volume and pulsation intensity
FR2407748A1 (en) * 1977-11-04 1979-06-01 Fives Cail Babcock Granular material classifier control - uses level difference to regulate pulsation of piston acting on liq. carrier medium
DE2823148A1 (en) * 1978-05-26 1979-11-29 Kloeckner Humboldt Deutz Ag AUTOMATIC CONTROL PROCESS FOR ELECTRIC-PNEUMATIC WETTENING MACHINE FOR SEPARATION OF MINERAL MIXTURES, IN PARTICULAR COAL

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997009116A1 (en) * 1995-09-08 1997-03-13 The University Of Queensland Dynamic monitoring and control of jigs
US6070738A (en) * 1995-09-08 2000-06-06 The University Of Queensland Dynamic monitoring and control of jigs

Also Published As

Publication number Publication date
IN152606B (en) 1984-02-18
DE3167568D1 (en) 1985-01-17
FR2485397B1 (en) 1982-07-23
FR2485397A1 (en) 1981-12-31
US4342654A (en) 1982-08-03
CA1174750A (en) 1984-09-18
EP0042771B1 (en) 1984-12-05
ZA814069B (en) 1982-07-28

Similar Documents

Publication Publication Date Title
EP0042771A1 (en) Method to regulate the pulse amplitude in a pneumatic jig
FR2519905A1 (en) INK FEED SYSTEM FOR INKJET PRINTER
BE898611A (en) METHOD AND APPARATUS FOR AEROPONIC PROPAGATION OF PLANTS
FR2503129A1 (en) DEVICE FOR PRODUCING FRESH WATER FROM SEAWATER BY REVERSE OSMOSIS
FR2996986A1 (en) METHOD FOR CONTROLLING A PRESSURIZED RICE COOKER AND A PRESSED RICE COOKER FOR IMPLEMENTING SUCH A METHOD
FR2498989A1 (en) METHOD OF PROTECTING AGAINST THE COLLAPSE OF AN INK DROPLELET PROJECTION DEVICE, PROJECTION DEVICE AND INKJET PRINTER
EP0239708B1 (en) Pasteurization apparatus for foodstuffs in containers
WO2010072943A1 (en) Food cooking basket and corresponding cooking system
CA2969175A1 (en) Method for controlling a rice cooker and rice cooker for implementation of such a method
FR2484839A1 (en) METHOD AND DEVICE FOR CIRCULATING AND PUMPING ORGANO-BIOLOGICAL LIQUIDS, IN PARTICULAR BLOOD
FR2555469A1 (en) Improvements to agricultural spraying installations
EP0210914B1 (en) Pressure cooker with a safety device formed by a gasket with a controlled steam outlet
FR2635499A1 (en) SYSTEM FOR DETERMINING THE MOMENT OR FUEL TANK OF A SPATIONEF IS EMPTY
EP1981658B1 (en) Method of washing pipework
FR2706788A1 (en)
FR2475079A1 (en) LIQUID PRODUCT DISPENSER, AND WASHING MACHINE HAVING SUCH A DISPENSER.
WO2016019476A1 (en) Method for supplying gas to an environment assigned to artificial cell culture and device for implementation of said method
FR2511839A1 (en) DEVICE FOR PRUNING TREES AND VINES
FR2484866A1 (en) Regulator for liquid amplitude control in swabbing tank - uses programmed calculator to control butterfly type air valve from separation level detector
EP0927826B1 (en) Liquid pumping system
FR2654817A1 (en) THERMAL TREATMENT DEVICE, PARTICULARLY FOR THE CHEMICAL AND FOOD INDUSTRIES.
EP0855164B1 (en) Compact water softening device for electrical domestic machine
FR2658068A1 (en) SYSTEM FOR THE SUPPLY OF WATER AND DETERGENT OF A DISHWASHER.
BE1022262B1 (en) APPARATUS FOR AUTOMATICALLY DISTRIBUTING PELLET FOODS FOR ANIMALS
FR2651645A1 (en) Device for improving the quality of the grape harvest by ripening or over-ripening with a view to vinification

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): DE GB

17P Request for examination filed

Effective date: 19820116

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE GB

REF Corresponds to:

Ref document number: 3167568

Country of ref document: DE

Date of ref document: 19850117

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

Ref country code: GB

Effective date: 19880521

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19890201